Jack

Abstract

The utility model discloses a jack, the jack is provided with a telescopic part and a loading part, the telescopic part is provided with an outer pipe and an inner pipe, the loading part is installed on the outer pipe, the outline of the cross section of the outer pipe is in a regular hexagon shape, and the loading part comprises a reinforcing plate and a loading assembly. The load-carrying assembly can be firmly combined on the outer pipe of the telescopic component by means of the self-locking function of the load-carrying assembly. Due to the distribution characteristics of the adjusting holes in the reinforcing plate, the requirement that the load-carrying assembly is located at different positions relative to the telescopic component is met, and the load-carrying end on the load-carrying assembly can be combined to different parts of the outer pipe through the load-carrying assembly to obtain the position adjusting operation relative to the telescopic component. The jack is provided with a detachable structure formed by combining the loading component and the telescopic component, the position of the loading component on the telescopic component is adjusted in a coarse adjustment and fine adjustment mode, then the needed operation height is obtained, and the operation mode saves time and labor and is high in working efficiency.

Description

Technical Field

[0001] This utility model relates to a jack. Background Technology

[0002] The RV jack has a side-mounted load end, which is fixed in position relative to the outer tube of the jack's telescopic component. Adjusting the load end's height from the ground can only be done by rotating the screw inside the jack. This method is time-consuming, labor-intensive, and inefficient. The fixed load end also hinders maintenance and repair; if damaged, it cannot be repaired by simple parts replacement but requires complete replacement. Summary of the Invention

[0003] The technical problem this invention aims to solve is how to quickly and flexibly adjust the position of the load-bearing end on the jack.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: The jack is provided with a telescopic component and a load-bearing component. The telescopic component has an outer tube and an inner tube. The inner tube is located inside the outer tube. The inner tube and the outer tube are movably connected by a screw component. The screw component includes a nut and a screw rod. The nut is fixedly connected to the inner tube, and the screw rod is movably connected to the outer tube. The center line of the screw rod, the center line of the outer tube, and the center line of the inner tube are parallel to each other. One end of the screw rod is located outside the outer tube. The load-bearing component is installed on the outer tube. The cross-sectional profile of the outer tube is a regular hexagon. The load-bearing component includes a reinforcing plate and a load-bearing assembly. A plate is fixedly connected to one side of the outer tube. The reinforcing plate has adjustment holes spaced apart in a direction parallel to the centerline of the outer tube. The load-bearing component includes a sleeve, a self-locking unit I, and a load-bearing unit. The sleeve has a receiving hole for the outer tube to pass through, and the cross-sectional profile of the receiving hole is the same as the cross-sectional profile of the outer tube where the reinforcing plate is connected. The self-locking unit I has a mounting base I, a return spring I, and a pin I. The mounting base I is fixedly mounted on the sleeve, and the pin I is movably mounted on the mounting base I. The pin I passes through the return spring I, and one end of the return spring I is connected to the mounting base I. The other end of the return spring I... The outer tube is connected to pin I, one end of which is located outside the mounting base I, and the other end of which passes through the mounting base I and extends into the receiving hole. The outer tube passes through the receiving hole. The load-bearing component is movably connected to the reinforcing plate by the pin I being embedded in the adjustment hole. The load-bearing unit is fixedly installed on the sleeve. The self-locking unit I and the load-bearing unit are located on both sides of the outer tube. The load-bearing unit includes a base, a self-locking unit II, and a load-bearing component. The base is fixedly installed on the sleeve and has a cavity. The self-locking unit II includes a mounting base II, a return spring II, and a pin II. The mounting base II is fixedly installed on the base, and the pin II is movably installed on the mounting base II. Above, the pin II passes through the return spring II. One end of the return spring II is connected to the mounting base II, and the other end of the return spring II is connected to the pin II. One end of the pin II is located outside the mounting base II, and the other end of the pin II passes through the mounting base II and the base and extends into the cavity. The load-bearing component is provided with a connecting end for embedding into the cavity and a load-bearing end for bearing the load. The load-bearing component is rotatably connected to the base by embedding into the cavity through the connecting end. The connecting end is provided with a limiting hole, which is distributed around the center line of the connecting end. The load-bearing component is movably connected to the base by embedding into the limiting hole through the pin II. The extension direction of the cavity is perpendicular to the center line of the outer tube.

[0005] The design concept of this jack lies in the movable connection of the load-bearing component and the telescopic component in a combined manner. The load-bearing component, relying on its self-locking function, can be firmly attached to the outer tube of the telescopic component. Because the distribution of adjustment holes on the reinforcing plate accommodates the different positions of the load-bearing component relative to the telescopic component, the load-bearing end of the load-bearing component can be adjusted relative to the telescopic component by connecting it to different parts of the outer tube. Compared to the existing technology of adjusting position by rotating a screw, this quick, convenient, and flexible adjustment method results in more efficient use. From the perspective of load-bearing operation, the height of the load-bearing end meets the final usage requirements. This process includes both large-amplitude and small-amplitude height adjustments. Large-amplitude adjustments are achieved by locking the load-bearing component after it moves along the reinforcing plate. Small-amplitude adjustments are achieved by extending or shortening the overall length of the telescopic component by driving the screw, thereby changing the relative position of the load-bearing component on the telescopic component. In use, large-amplitude position adjustments correspond to large-amplitude height adjustments, and small-amplitude position adjustments correspond to small-amplitude height adjustments. The height adjustment of the load-bearing end is implemented through both coarse and fine adjustments.

[0006] Besides restricting position, the reinforcing plate also enhances the mechanical strength of the outer tube. The increased thickness of the outer tube at the point of contact with the reinforcing plate, combined with the hexagonal cross-sectional profile of the outer tube, results in higher bending and torsional resistance. The load-bearing and telescopic components are detachable; the load-bearing component can be removed from the telescopic component for replacement or repair. Based on the above combination, the load-bearing end of the component can be height-adjusted and its posture adjusted via a movable connection structure that allows rotation of the load-bearing component on the base, enabling it to operate in either a horizontal or inclined position.

[0007] To ensure that the sliding of pin I is in a straight position, the self-locking unit I is equipped with a guide structure to ensure that the translational movement of pin I corresponds to the range of the adjustment holes on the reinforcing plate. The self-locking unit I also has a handle I, which is fixedly connected to pin I. The handle I has a guide sleeve, and the mounting base I has a guide post. Pin I passes through the guide post, and the guide post is embedded in the guide sleeve. The guide sleeve and the guide post are movably connected. The guide sleeve also serves to prevent external contaminants from entering the movement range of pin I.

[0008] To improve the bending and torsional resistance of the inner tube, the cross-sectional profile of the inner tube is regular hexagonal. This effectively increases the mechanical strength of the telescopic component in terms of bending and torsional resistance.

[0009] To accommodate both manual and electric drive, this jack features an open transmission mechanism. This mechanism includes a mounting base III, a drive shaft, bevel gear I, and bevel gear II. The mounting base III is fixedly mounted on one end of the outer tube. The drive shaft is movably mounted on the mounting base III, with one end located outside the mounting base III. The cross-section of this external end of the drive shaft is a regular polygon. Bevel gear I is fixedly connected to the drive shaft, and bevel gear II is fixedly mounted on a screw. Bevel gear I and bevel gear II mesh with each other. The centerline of the drive shaft is perpendicular to the centerline of the screw. The external end of the drive shaft is used to connect to a hand crank or a drill with a socket. Both the hand crank and the socket have internal holes corresponding to the polygonal end of the drive shaft. Connecting the handle or the drill with the socket to the drive shaft drives its rotation, thus achieving compatibility with both manual and electric drive. The regular polygon can also be a square or a regular octagon.

[0010] This utility model adopts the above-mentioned technical solution: the jack has a detachable structure that combines a load-bearing component and a telescopic component. The position of the load-bearing component on the telescopic component can be adjusted by coarse and fine adjustment to obtain the required working height. This operation method saves time and effort and has high work efficiency. Attached Figure Description

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram illustrating the usage state of a jack equipped with a hand crank according to this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of a jack according to the present invention;

[0014] Figure 3 for Figure 2 A magnified view of a portion at point A;

[0015] Figure 4 for Figure 2 A magnified view of the area at point B;

[0016] Figure 5 This is a schematic diagram of the load-bearing component structure of a jack according to the present invention. Detailed Implementation

[0017] like Figure 1 , 2 As shown in Figures 3, 4, and 5, the jack includes a transmission component 1, a telescopic component 6, and a load-bearing component 11. The load-bearing component 11 is movably mounted on the telescopic component 6, and the transmission component 1 is fixedly mounted on one end of the telescopic component 6.

[0018] The telescopic component 6 comprises an outer tube 8 and an inner tube 7, both of which are hexagonal tubes, resulting in both the outer and inner contours of the cross-section of the outer tube 8 being regular hexagons. The inner tube 7 and outer tube 8 are movably connected via a lead screw assembly. The lead screw assembly includes a nut 9 and a screw rod 10. The nut 9 is fixedly connected to the inner tube 7, while the screw rod 10 is movably connected to the outer tube 8, with the nut 9 and screw rod 10 engaging. After installation, the inner tube 7 is located inside the outer tube 8, and the centerlines of the screw rod 10, the inner tube 7, and the outer tube 8 coincide; one end of the screw rod 10 is located outside the outer tube 8. Rotation of the screw rod 10 changes the position of the nut 9 on the screw rod 10, thus changing the relative position of the outer tube 8 and the inner tube 7, thereby enabling the telescopic component 6 to extend and retract.

[0019] The load-bearing component 11 includes a reinforcing plate 12 and a load-bearing assembly. The reinforcing plate 12 is a straight, elongated plate structure with equally spaced, straight-arranged adjustment holes 13. The reinforcing plate 12 is fixedly connected to one side of the outer tube 8, and the width of the reinforcing plate 12 is smaller than the width of the side of the outer tube 8. The adjustment holes 13 are arranged parallel to the centerline of the outer tube 8.

[0020] The load-bearing assembly includes a sleeve 14, a self-locking unit I, and a load-bearing unit. The sleeve 14 has a receiving hole for the outer tube 8 to pass through, the cross-sectional profile of which is the same as the cross-sectional profile of the outer tube 8 at the point where it is connected to the reinforcing plate 12. The self-locking unit I includes a mounting base I 15, a return spring I 17, a pin I 18, and a handle I 19. The mounting base I 15 is fixedly mounted on the sleeve 14. The mounting base I 15 has a guide post 16, the interior of which is a channel structure. The pin I 18 is located inside the guide post 16 and can slide within the mounting base I 15. The end of the guide post 16 has an inwardly protruding portion, and the pin I 18 has a stepped surface. The return spring I 17 is fitted onto the pin I 18 and located between the inwardly protruding portion of the guide post 16 and the stepped surface of the pin I 18. One end of the return spring I 17 is connected to the mounting base I 15, and the other end is connected to the pin I 18. Pin I18 passes through guide post 16, with one end of pin I18 located outside mounting base I15 and the other end extending into receiving hole through mounting base I15. The end of pin I18 outside mounting base I15 is fixedly connected to handle I19, which has a guide sleeve. Guide post 16 is embedded in the guide sleeve, and the guide sleeve and guide post 16 are movably connected in a guiding manner. Telescopic component 6 passes through sleeve 14, with outer tube 8 and reinforcing plate 12 both located within receiving hole. Pin I18 is embedded in adjustment hole 13, thus movably connecting the load-bearing component to reinforcing plate 12. When pin I18 disengages from adjustment hole 13, the load-bearing component is movable relative to telescopic component 6, allowing for significant changes in its position relative to telescopic component 6. When pin I18 is embedded in adjustment hole 13, the load-bearing component and telescopic component 6 are immovable.

[0021] The load-bearing unit is fixedly installed on the sleeve 14, and the self-locking unit I and the load-bearing unit are located on both sides of the outer tube 8. The load-bearing unit includes a base 20, a self-locking unit II, and a load-bearing component. The base 20 is fixedly installed on the sleeve 14 and has a cavity with a circular cross-section. The extension direction of the cavity is perpendicular to the center line of the outer tube 8. The load-bearing component has a connecting end 21 for embedding into the cavity and a load-bearing end 23 for bearing the load. The cross-sectional profile of the connecting end 21 is circular, and the load-bearing component is rotatably connected to the base 20 by embedding it into the cavity through the connecting end 21. The connecting end 21 also has limiting holes 22, which are distributed at equal angular intervals around the center line of the connecting end 21. The structure of the load-bearing end 23 is designed to match the load-bearing object and can be a disc-shaped structure with through holes or a load-bearing surface structure. The self-locking unit II has a mounting base II 24, a return spring II 25, a pin II 26, and a handle II 27. The mounting base II 24 is fixedly installed on the base 20 and located outside the base 20. Mounting base II 24 has an internal channel with an inward protrusion at one end. Pin II 26 has a stepped surface. Return spring II 25 is fitted onto pin II 26, positioned between the inward protrusion of mounting base II 24 and the stepped surface of pin II 26. One end of return spring II 25 is connected to mounting base II 24, and the other end is connected to pin II 26. One end of pin II 26 is located outside mounting base II 24, while the other end passes through mounting base II 24 and base 20, extending into the cavity of base 20. This external end of pin II 26 is connected to handle II 27. Pin II 26 is movably mounted on mounting base II 24 and can slide on it. Pin II 26 can be inserted into the limiting hole 22 of the load-bearing component to prevent the load-bearing component from rotating. However, when pin II 26 is disengaged from the limiting hole 22, the load-bearing component can rotate. Therefore, the load-bearing component is movably connected to the base 20 through pin II 26 inserted into the limiting hole 22.

[0022] The transmission component 1 includes a mounting base Ⅲ2, a drive shaft 3, a bevel gear Ⅰ4, and a bevel gear Ⅱ5. The mounting base Ⅲ2 is hollow and is fixedly mounted on one end of the outer tube 8. The drive shaft 3 is movably mounted on the mounting base Ⅲ2, with one end of the drive shaft 3 located outside the mounting base Ⅲ2, allowing the drive shaft 3 to rotate on the mounting base Ⅲ2. The cross-section of the end of the drive shaft 3 located outside the mounting base Ⅲ2 is a regular hexagon. The bevel gear Ⅰ4 is fixedly connected to the drive shaft 3, and the bevel gear Ⅱ5 is fixedly mounted on the screw 10, with the bevel gear Ⅰ4 and bevel gear Ⅱ5 meshing together. After installation, the centerline of the drive shaft 3 is perpendicular to the centerline of the screw 10.

[0023] In use, first perform a coarse adjustment: disengage pin I18 from adjustment hole 13 and adjust the position of the load-bearing component relative to the telescopic component 6 to be close to or at the ideal position. Then, insert pin I18 into adjustment hole 13 to integrate the load-bearing component 11 with the telescopic component 6. Finally, connect the drive shaft 3 to the hand crank. The hand crank has an inner hole with a regular hexagonal cross-section, which corresponds to the end of the drive shaft 3 with a regular hexagonal cross-section. The drive shaft 3 is inserted into the hand crank to complete the connection. Rotating the hand crank will drive the screw 10 to rotate, changing the relative position between the outer tube 8 and the inner tube 7, which is called fine adjustment, so that the position of the load-bearing component 11 on the entire jack can be changed. The jack is used in a vertical position. The above coarse and fine adjustments result in the height adjustment of the load end 23. In addition to manual fine-tuning, electric fine-tuning is also possible. An electric drill with a sleeve is used to align with the rotating shaft. The inner hole of the sleeve corresponds to the hexagonal end of the drive shaft 3. The drive shaft 3 is inserted into the sleeve to complete the alignment. Starting the electric drill drives the screw 10 to rotate. In this embodiment, the load-bearing end 23, besides being height-adjustable, also has posture-adjustable capabilities. Because the load-bearing component can rotate relative to the base 20, rotating the load-bearing component while the self-locking unit II is released allows the load-bearing end 23 to be in a horizontal or tilted position. Once the load-bearing end 23 is in the desired position, the self-locking unit II can be locked.

[0024] In addition to the above embodiments, new embodiments can be obtained by selecting a drive shaft with a square end cross-section, and new embodiments can be obtained by selecting a drive shaft with an octagonal end cross-section.

Claims

1. A jack, which is provided with a telescopic part (6) and a load bearing part (11), the telescopic part (6) is provided with an outer tube (8) and an inner tube (7), the inner tube (7) is located inside the outer tube (8), the inner tube (7) and the outer tube (8) are movably connected through a screw part, the screw part includes a nut (9) and a screw rod (10), the nut (9) is fixedly connected with the inner tube (7), the screw rod (10) is movably connected with the outer tube (8), the center line of the screw rod (10), the center line of the outer tube (8) and the center line of the inner tube (7) are parallel to each other, one end of the screw rod (10) is located outside the outer tube (8), the load bearing part (11) is installed on the outer tube (8), characterized in that: The cross section profile of the outer tube (8) is regular hexagon, the load bearing component (11) comprises a reinforcing plate (12), a load bearing assembly, the reinforcing plate (12) is fixedly connected on one side of the outer tube (8), the reinforcing plate (12) is provided with adjusting holes (13), the adjusting holes (13) are arranged in parallel to the center line of the outer tube (8), the load bearing assembly comprises a sleeve (14), a self-locking unit I, a load bearing unit, the sleeve (14) is provided with a containing hole for passing through the outer tube (8), the cross section profile of the containing hole is same as the cross section profile of the outer tube (8) at the position where the reinforcing plate (12) is connected, the self-locking unit I is provided with a mounting seat I (15), a reset spring I (17), a bolt I (18), the mounting seat I (15) is fixedly installed on the sleeve (14), the bolt I (18) is movably installed on the mounting seat I (15), the bolt I (18) passes through the reset spring I (17), one end of the reset spring I (17) is connected with the mounting seat I (15), the other end of the reset spring I (17) is connected with the bolt I (18), one end of the bolt I (18) is located outside the mounting seat I (15), the other end of the bolt I (18) passes through the mounting seat I (15) and extends into the containing hole, the outer tube (8) passes through the containing hole, the load bearing assembly is movably connected with the reinforcing plate (12) through the bolt I (18) embedded in the adjusting hole (13), the load bearing unit is fixedly installed on the sleeve (14), the self-locking unit I and the load bearing unit are located on both sides of the outer tube (8), the load bearing unit comprises a base (20), a self-locking unit II, a load bearing piece, the base (20) is fixedly installed on the sleeve (14), the base (20) is provided with a cavity, the self-locking unit II is provided with a mounting seat II (24), a reset spring II (25), a bolt II (26), the mounting seat II (24) is fixedly installed on the base (20), the bolt II (26) is movably installed on the mounting seat II (24), the bolt II (26) passes through the reset spring II (25), one end of the reset spring II (25) is connected with the mounting seat II (24), the other end of the reset spring II (25) is connected with the bolt II (26), one end of the bolt II (26) is located outside the mounting seat II (24), the other end of the bolt II (26) passes through the mounting seat II (24) and the base (20) and extends into the cavity, the load bearing piece is provided with a connecting end (21) embedded in the cavity and a load bearing end (23) for bearing load, the load bearing piece is rotatably connected with the base (20) through the connecting end (21) embedded in the cavity, the connecting end (21) is provided with limiting holes (22) distributed around the center line of the connecting end (21), the load bearing piece is movably connected with the base (20) through the bolt II (26) embedded in the limiting holes (22), the extension direction of the cavity is perpendicular to the center line of the outer tube (8).

2. The jack of claim 1, wherein: The self-locking unit I is further provided with a handle I (19), the handle I (19) is fixedly connected with the bolt I (18), the handle I (19) is provided with a guide sleeve, the mounting seat I (15) is provided with a guide column (16), the bolt I (18) passes through the guide column (16), the guide column (16) is embedded in the guide sleeve, and the guide sleeve is movably connected with the guide column (16).

3. The jack of claim 1, wherein: The cross-sectional profile of the inner tube (7) is a regular hexagon.

4. The jack of claim 1, wherein: The jack is provided with a transmission component (1), the transmission component (1) comprises a mounting seat III (2), a transmission shaft (3), a bevel gear I (4) and a bevel gear II (5), the mounting seat III (2) is fixedly installed at one end of the outer tube (8), the transmission shaft (3) is movably installed on the mounting seat III (2) and one end of the transmission shaft (3) is located outside the mounting seat III (2), the cross section of the end of the transmission shaft (3) located outside the mounting seat III (2) is a regular polygon, the bevel gear I (4) is fixedly connected on the transmission shaft (3), the bevel gear II (5) is fixedly installed on the screw rod (10), the bevel gear I (4) is meshingly connected with the bevel gear II (5), and the center line of the transmission shaft (3) is perpendicular to the center line of the screw rod (10).

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