Abstract: An oil return mechanism includes a base, a control switch, a first blocking ball mounted in the base, an elastic member mounted between the first blocking ball and the base. The base has a liquid storing cavity, a liquid returning cavity, a communicating cavity, a first communicating opening communicating between the liquid returning cavity and the communicating cavity, and a second communicating opening communicating between the communicating cavity and the liquid storing cavity. The present invention can regulate a speed of a fluid flowing from the liquid returning cavity to the communicating cavity, and has the advantages of simple structure and great reduction of cost.

Abstract: An oil return mechanism includes a base, a control switch, a first blocking ball mounted in the base, an elastic member mounted between the first blocking ball and the base. The base has a liquid storing cavity, a liquid returning cavity, a communicating cavity, a first communicating opening communicating between the liquid returning cavity and the communicating cavity, and a second commit eating opening communicating between the communicating cavity and the liquid storing cavity. The present invention can regulate a speed of a fluid flowing from the liquid returning cavity to the communicating cavity, and has the advantages of simple structure and great reduction of cost.

Abstract: An adjustable hydraulic jack with a slider locking structure that includes a chassis, hydraulic assembly, boom assembly, and handle lever. The boom assembly includes a bracket, a fore arm, and a rear arm. The bracket includes a pull handle, left and right bracket side-plates, and a bracket-fixing pin. The bracket is connected to one end of the fore arm, the other end of the fore arm is connected to one end of the rear arm, and the other end of the rear arm is connected to the chassis. The left and right bracket side-plates have left and right side-plate sockets on their respective bottoms; the fore arm has left and right sliding chutes and a spring-loaded fixing pin fixed on its upper end. A slider locking device is arranged between the bracket and the fore arm, and includes left and right sliders, a spring and at least one pin shaft.

Abstract: A creeper for car repair which belongs to the technical field of basic hand tools, includes a creeper body and an object scraper mechanism which is pivotally connected with one end of the creeper body. The technical solution provided by the present invention is equipped to an object scraper mechanism which is pivotally connected with one end of the creeper body for unfolding from the creeper body and being perpendicular to the service creeper body when the operator is standing upright and heavy objects are carried, as well as laying against the back of the service creeper body when the scraper mechanism is not being used and is folded, thus facilitating the object transportation and reducing the work intensity for the operators.

Abstract: A boom-adjustable horizontal hydraulic jack with a pull-lock mechanism belongs to a lifting apparatus. The jack comprises a chassis, a hydraulic assembly, a press handle, a boom assembly, and a link rod assembly, wherein, the boom assembly comprises a bearer, a forearm, and a rear arm; the link rod assembly comprises a first link rod and a second link rod; wherein, a pull-lock mechanism is additionally arranged on the bearer, and comprises a guide rod seat, a guide rod, a pull handle, a guide sleeve, a steel rope, a dialing plate shaft, and a locking pin shaft.

Abstract: A hydraulic jack capable of displaying load and overload warning, belonging to the technical field of hydraulic lifting equipment. It comprises: a base, a lifting arm, a pump body, a handle, and a tray, wherein, a signal collection assembly designed to sense the load on the tray is arranged at the end of the lifting arm, and the signal collection assembly is electrically connected to a weighing controller arranged on either the base or the pump body, and the tray is arranged on the signal collection assembly. Since a signal collection assembly designed to sense the load on the tray is arranged at the end of the lifting arm and electrically connected to the weighing controller, the load sensing method by the aid of communication with the oil circuit in the prior art is abandoned and the leakage of hydraulic oil can be avoided; since the signal collection assembly is arranged at the end of the lifting arm, the entire assembly can be easily processed, installed, and maintained.

Abstract: In pneumatic non-load quick dual-speed hydraulic jack, the small of piston ring (17) of hydraulic pump cylinder integrates with pump body (19) and external ring of step pump core (14) to form movable assembly. The middle part of step pump core (14) is provided with pump core step interface (8) used for conversion of hydraulic speed. The step hole on the same axis of pneumatic valve block on special pneumatic valve structure is provided with washer (48), button (49), pneumatic valve core (45), compressed spring (68) and valve core fastness set. The pneumatic valve parts can replace the hydraulic quick pump structure partially when the high-pressure air source is available. High-pressure air delivered to the oil reservoir of the external sleeve (4) presses the hydraulic oil into the oil chamber of oil cylinder, and thus facilitates the quick lift of jack piston under light load or empty load.

Abstract: An adjustable hydraulic horizontal jack including a frame, a hydraulic unit, a jib unit, link rods, and a handle. Here, the structures of the jib and the link rod(s) are improved according to an embodiment. With the improved structures, the jack has rational structures and can act reliably. In addition, under the parameters equivalent to those of conventional hydraulic horizontal jacks, the jack of an embodiment of the present invention can change the height of the lowest position and the load by adjusting the length of the jib and link rods. Therefore, the jack is adapted to jacking up not only a light automobile with a low chassis but also a heavy automobile with a high chassis, thus having a wider scope of application.

Abstract: This inventions involves a type of multi-node operating handle and elastic connecting device for non-cylinder shear jack; the front node handle is provided with two perforated holes used for locking of pin to facilitate the axle and hole coordination; the rear node handle is provided with three prefabricated holes for rivet joint, which makes use of two rivets to realize the serial connection of elastic metal sheet with locking pin and rear node handle as well as the pressing rivet joint of rivets; furthermore, both front and rear node handles have non-cylinder coordination available for better transfer of torsion moment, which can be used to shape the locking pin on the body of elastic metal sheet through pressing. Favorable effects of this invention are stated as follows: the handle structure and connecting device as described in this proposal can facilitate the length combination of operating handle in accommodation with lifting under different loads, which can ensure the reliability of the handle in use.

Abstract: A type of illuminating device used to horizontal jack, of which, the middle part of the axial hole of tray axle (1) is provided with insulating filling (6) and transparent polymethylmethacrylate sheet (10); the positioning set (11) under the polymethylmethacrylate sheet (10) is equipped with LED illuminating bulb (13) and relevant circuit elements to form the loop of the illuminating circuit available for control of switch-on and switch-off; the illuminating device of this invention is integrated on the central part of the tray of horizontal jack, which makes full use of the space of tray axial hole to ensure the reliable operation of illuminating elements and relevant circuits with its sound sealing performance for the purpose of improving the poor illumination and solving the problem with maintenance of vehicles and lifting of heavy goods at night.

Abstract: This invention involves a type of connecting device for handle operation, including front node handle, rear node handle and locking pin.