A handle-adjustable jack

Abstract

The application relates to a handle-adjustable jack, which comprises a base, a lifting plate and an extension plate, the rotating axis of the extension plate and the lifting plate is located on the side of the rotating axis of the lifting plate away from a heavy object, the base is provided with a driving mechanism, the driving mechanism comprises a screw rod, a sleeve, a worm wheel and a worm, the sleeve is sleeved outside the screw rod and is in threaded connection with the screw rod, the worm wheel is in mesh with the worm, and a rotating block is coaxially arranged on the worm; a handle is rotatably connected to the base, the handle comprises a fixed sleeve rod and a rotating rod, a rotating groove is arranged on the end face of the rotating rod close to the base, and the rotating rod can be inserted into the rotating groove and abut against the inner wall of the rotating groove. When the lifting plate needs to be lifted, the worm is driven to rotate by rotating the rotating rod, the extension plate is driven to move away from the rotating block, the end of the lifting plate close to the heavy object is lifted to lift the heavy object, and the handle does not need to be moved up and down in the lifting process, so that the use of the jack is not easily affected.

Description

Technical Field

[0001] This application relates to the technical field of jacks, and more particularly to a jack with an adjustable handle. Background Technology

[0002] A jack is a device widely used in automobiles or other vehicles to lift heavy objects. When in use, the jack is placed under the object to be lifted, and force is applied to the object to lift it.

[0003] Current jacks are typically hydraulic or mechanical. During use, the horizontal bar usually needs to be pressed up and down repeatedly to gradually lift the load. However, when the area below the load is confined, the horizontal bar may collide with the load or other objects while being pressed, resulting in a limited range of motion and a slow lifting speed, thus affecting the jack's efficiency.

[0004] Therefore, a new technical solution is needed to address the above problems. Summary of the Invention

[0005] To make the use of the jack more convenient and less susceptible to interference from debris, this application provides a jack with an adjustable handle.

[0006] This application provides a jack with an adjustable handle, which adopts the following technical solution:

[0007] An adjustable-handle jack includes a base, a lifting plate rotatably connected to the base, and an extension plate rotatably connected to one end of the lifting plate. The end of the lifting plate away from the extension plate can abut against the lower end of a heavy object. The rotation axis of the extension plate and the lifting plate is located on the side of the lifting plate's own rotation axis away from the heavy object. The base is provided with a drive mechanism for driving the extension plate to move. The drive mechanism includes a lead screw hinged to the extension plate, a sleeve rotatably connected to the base, a worm gear coaxially fixed to the sleeve, and a worm rotatably connected to the base. The sleeve is sleeved outside the lead screw and threadedly connected to the lead screw. The worm gear meshes with the worm. A rotating block is coaxially provided on the worm.

[0008] A handle is rotatably connected to the base. The handle includes a fixed sleeve rod rotatably connected to the base and a rotating rod passing through the fixed sleeve rod. A rotating groove is provided on the end face of the rotating rod near the base. The rotating rod can be inserted into the rotating groove and abut against the inner wall of the rotating groove.

[0009] By adopting the above technical solution, when the lifting plate needs to be raised, the rotating rod is taken out from the fixed sleeve and connected to the rotating block. Then, by rotating the rotating rod, the worm gear is driven to rotate, causing the extension plate to move away from the rotating block, thereby driving the end of the lifting plate close to the heavy object to rise and lift the heavy object. During the lifting process, it is no longer necessary to move the handle up and down, so that the use of the jack is not easily affected.

[0010] Optionally: The lower end of the fixed sleeve rod is fixed with several mounting plates, the rotating rod can pass through the mounting plates, and the rotating rod can be connected to the rotating block.

[0011] By adopting the above technical solution, when the rotating block is rotated using the rotating rod, the rotating rod passes through the mounting plate, and the mounting plate limits the position of the rotating rod, so that the position of the rotating rod does not change too much during the rotation process, thereby making the use of the jack more stable.

[0012] Optionally, a drive rod may be detachably connected to the side wall of the rotating rod away from the base, and the drive rod is arranged perpendicular to the rotating rod.

[0013] By adopting the above technical solution, the rotating rod is driven to rotate by applying force to the drive rod, and a position where force can be directly applied is provided during the rotation of the rotating rod, thus making the rotation process of the rotating rod more convenient.

[0014] Optionally: An extension rod is hinged to the drive rod, the hinge axis of the extension rod and the drive rod passes through the axis of the drive rod, a rotating tube is coaxially rotatable on the extension rod, a clearance groove is passed through the side wall of the drive rod, and the extension rod can rotate into the clearance groove and the side wall of the extension rod protrudes from the clearance groove.

[0015] By adopting the above technical solution, the rotating tube can be directly held to drive the rotating rod to rotate, and there is no need to release the rotating tube during the rotation process, thus making the rotation process of the rotating rod more convenient.

[0016] Optionally: The end face of the rotating rod away from the base is provided with a receiving groove, and the driving rod can be set in the receiving groove. The outer wall of the driving rod and the outer wall of the rotating tube can both fit against the inner wall of the receiving groove.

[0017] By adopting the above technical solution, the drive rod can be stored in the receiving slot when it is not necessary to rotate the rotating rod, thereby reducing the space required for the rotating rod during storage and making the storage process of the jack more convenient.

[0018] Optionally: The rotating rod is provided with a support mechanism for supporting the rotating rod. The support mechanism includes a sleeve that rotates coaxially on the rotating rod and a support member that is rotatably connected to the sleeve. The rotation axis of the support member and the sleeve passes through the axis of the rotating rod, and the support member can rotate to abut against the ground.

[0019] By adopting the above technical solution, the end of the rotating rod away from the base is supported by a support mechanism, so that the end of the rotating rod away from the base is less likely to bend downward during rotation, thus making the rotation of the rotating rod less affected.

[0020] Optionally: The support includes a gripping part and several connecting parts rotatably connected to the sleeve. The connecting parts are located on both sides of the rotating rod. The end of the connecting part away from the sleeve is connected to the gripping part. The gripping part is located at the end of the rotating rod away from the base.

[0021] By adopting the above technical solution, the grip is rotated to a vertical position when the rotating rod rotates, so that the lower end of the grip is in contact with the ground and can be stepped on, thereby limiting the overall position of the rotating rod and making the rotation of the rotating rod less affected.

[0022] Optionally: The gripping part is provided with a limiting mechanism that limits the position of the gripping part. The limiting mechanism includes a limiting rod passing through the gripping part and a limiting elastic member that drives the limiting rod to move toward the rotating rod. The limiting rod can pass through the connecting parts and be inserted into the driving rod. One end of the limiting elastic member is connected to the gripping part, and the other end of the limiting elastic member is connected to the limiting rod.

[0023] By adopting the above technical solution, the relative position between the grip and the rotating rod is limited by the limiting mechanism. When the base is moved by the handle, the grip will not rotate relative to the rotating rod, making the grip more convenient and stable to use.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By rotating the worm gear, the sleeve is rotated, which in turn drives the lead screw to move, thus enabling the lifting plate to move vertically. During the use of the jack, the handle no longer needs to move vertically back and forth, making the rotation of the worm gear less susceptible to the influence of heavy objects, thereby making the use of the jack more stable.

[0026] 2. By setting a support mechanism on the rotating rod, the end of the rotating rod away from the base is supported during the rotation of the rotating rod, so that the rotating rod is not easily bent and its normal rotation is not easily affected. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0028] Figure 2 This is a schematic diagram illustrating the internal structure of the jack in an embodiment of this application;

[0029] Figure 3 for Figure 2 Enlarged view of part A;

[0030] Figure 4 This is a schematic diagram illustrating the connection relationship between the rotating rod and the fixed sleeve rod in an embodiment of this application;

[0031] Figure 5 for Figure 4 Enlarged view of part B;

[0032] Figure 6 for Figure 1 Enlarged view of part C.

[0033] In the diagram, 1. Base; 11. Lifting plate; 12. Extension plate; 13. Abutment plate; 14. Support rod; 2. Drive mechanism; 21. Lead screw; 22. Sleeve; 23. Worm gear; 24. Worm; 25. First bevel gear; 26. Second bevel gear; 27. Rotating block; 3. Handle; 31. Fixed sleeve rod; 32. Rotating rod; 321. Rotating groove; 322. Receiving groove; 33. Mounting plate; 34. Drive rod; 341. Clearance groove; 35. Extension rod; 36. Rotating tube; 4. Support mechanism; 41. Sleeve; 42. Support component; 421. Grip part; 422. Connecting part; 5. Limiting mechanism; 51. Limiting rod; 52. Limiting elastic component; 53. Pull ring; 54. Baffle plate. Detailed Implementation

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] This application discloses a jack with an adjustable handle, such as... Figure 1 and Figure 2As shown, the system includes a base 1, a lifting plate 11 rotatably connected to the base 1, and an extension plate 12 rotatably connected to one end of the lifting plate 11. An abutment plate 13 is rotatably connected to the end of the lifting plate 11 away from its axis of rotation, and the upper end of the abutment plate 13 can abut against the lower end of a heavy object. A support rod 14 is also rotatably connected to the base 1, and the other end of the support rod 14 is hinged to the lower end of the abutment plate 13. The support rod 14 is curved, with its end away from the abutment plate 13 inclined upwards, and the end of the support rod 14 away from the abutment plate 13 close to the axis of rotation of the lifting plate 11. The axis of rotation of the support rod 14 and the base 1 is located on the side of the axis of rotation of the lifting plate 11 and the base 1, closer to and slightly below the abutment plate 13. The extension plate 12 is located below the rotation axis of the lifting plate 11 and the base 1. The rotation axes of the extension plate 12 and the lifting plate 11, the lifting plate 11 and the base 1, and the lifting plate 11 and the abutment plate 13 are arranged in a triangle. The rotation axis of the extension plate 12 and the lifting plate 11 is located on the side of the axis of the lifting plate 11 and the base 1 away from the abutment plate 13 and slightly below it. Figure 3 As shown, the base 1 is also equipped with a drive mechanism 2 that drives the lifting plate 11 to move upward. The drive mechanism 2 includes a lead screw 21 hinged to the extension plate 12, a sleeve 22 rotatably connected to the base 1, a worm gear 23 coaxially fixed to the sleeve 22, and a worm 24 rotatably connected to the base 1. The hinge axis of the lead screw 21 and the extension plate 12 is parallel to the hinge axis of the extension plate 12 and the lifting plate 11, and is located at the end closer to the load. The sleeve 22 is sleeved on the lead screw 21, and the sleeve 22 and the lead screw 21 are threaded together, so that the lead screw 21 can be moved during the rotation of the sleeve 22, so as to easily lift the jack.

[0036] The worm 24 meshes with the worm wheel 23, and a first bevel gear 25 is coaxially fixed on the worm 24. A second bevel gear 26 is rotatably connected to the base 1. The first bevel gear 25 meshes with the second bevel gear 26, and the second bevel gear 26 is located on the side of the worm wheel 23 away from the weight. A rotating block 27 is coaxially fixed on the second bevel gear 26. The cross section of the rotating block 27 away from the second bevel gear 26 is a regular octagon. The rotation axis of the rotating block 27 is inclined upward, thus forming an angle of 0 to 45 degrees with the horizontal plane.

[0037] like Figure 1 and Figure 3As shown, the base 1 is also provided with a handle 3 for pushing the base 1. The handle 3 includes a fixed sleeve rod 31 hinged to the base 1 and a rotating rod 32 passing through the fixed sleeve rod 31. The hinge axis of the fixed sleeve rod 31 and the base 1 is parallel to the hinge axis of the extension plate 12 and the lifting plate 11. The fixed sleeve rod 31 can rotate to an inclined state, and two mounting plates 33 are welded to the lower end of the outer wall of the fixed sleeve rod 31 along its length. One end of the rotating rod 32 inserted into the fixed sleeve rod 31 can be threadedly connected to the fixed sleeve rod 31. An octagonal rotating groove 321 is opened at the end of the rotating rod 32 near the base 1. The rotating block 27 can be inserted into the rotating groove 321, and the side wall of the rotating block 27 can abut against the side wall of the rotating groove 321. The rotating rod 32 can be mounted on two mounting plates 33, and the rotating rod 32 can be connected to the rotating block 27 and drive the rotating block 27 to rotate. During the rotation of the rotating rod 32, the mounting plate 33 guides the rotation of the rotating rod 32. During the upward movement of the lifting plate 11, it is no longer necessary to move the rotating rod 32 up and down, so that the vertical movement of the lifting plate 11 is not easily affected.

[0038] like Figure 4 and Figure 5 As shown, because the surface of the rotating rod 32 is relatively smooth during rotation, a greater force is required to hold and rotate it, making rotation difficult. Therefore, a drive rod 34 is detachably connected to the side wall of the rotating rod 32 away from the base 1. The drive rod 34 is perpendicular to the rotating rod 32 and is threadedly connected to it. A relief groove 341 extends through the side wall of the drive rod 34, protruding outwards away from the axis of the drive rod 34. An extension rod 35 is hinged within the relief groove 341. The extension rod 35 can rotate to be perpendicular to the drive rod 34, and the axes of the extension rod 35 and the drive rod 34 are perpendicular to the axis of the rotating rod 32. A rotating tube 36 is coaxially rotatable on the extension rod 35. The extension rod 35 and the rotating tube 36 can rotate into the relief groove 341, and the side walls of the extension rod 35 and the rotating tube 36 can protrude from the relief groove 341. Thus, when rotating the rotating rod 32, force is directly applied to the rotating tube 36, making the rotation of the rotating rod 32 more convenient.

[0039] like Figure 5 As shown, the end face of the rotating rod 32 away from the base 1 is also provided with a receiving groove 322 for accommodating the driving rod 34. The driving rod 34 can be disposed in the receiving groove 322. The outer walls of the driving rod 34 and the rotating tube 36 can fit against the inner wall of the receiving groove 322, so that after the driving rod 34 is disposed in the receiving groove 322, the driving rod 34 is not easy to move relative to the rotating rod 32.

[0040] like Figure 6As shown, due to the relatively long length of the rotating rod 32, the end furthest from the base 1 will bend downwards during rotation. Therefore, a support mechanism 4 is provided on the rotating rod 32 to support it. The support mechanism 4 includes a sleeve 41 rotatably connected to the rotating rod 32 and a support member 42 rotatably connected to the sleeve 41. The sleeve 41 is coaxially arranged with the rotating rod 32 and rotates along the axis of the rotating rod 32. The support member 42 includes a gripping part 421 and two connecting parts 422 rotatably connected to the sleeve 41. The connecting parts 422 are located on both sides of the rotating rod 32, and the rotation axis of the connecting parts 422 and the sleeve 41 is perpendicular to the rotating rod 32. The gripping part 421 is located at the end of the two connecting parts 422 furthest from the sleeve 41, and the gripping part 421 can rotate to the end of the rotating rod 32 furthest from the base 1. Thus, after rotating the grip 421 to a vertical position, the grip 421 comes into contact with the ground, the grip 421 supports the rotating rod 32, and stepping on the grip 421 can keep the position of the grip 421 stable.

[0041] like Figure 5 and Figure 6 As shown, in order to prevent the grip portion 421 from rotating relative to the rotating rod 32 when the base 1 is moved using the handle 3, a limiting mechanism 5 is provided on the grip portion 421 to limit the position of the grip portion 421. The limiting mechanism 5 includes a limiting rod 51 passing through the grip portion 421 and a limiting elastic member 52 that drives the limiting rod 51 to move toward the rotating rod 32. One end of the limiting rod 51 can pass through the grip portion 421 and be inserted between the two connecting portions 422, and the end of the limiting rod 51 located between the two connecting portions 422 can be inserted into the driving rod 34. A pull ring 53 passes through the end of the limiting rod 51 away from the driving rod 34. A stop plate 54 is coaxially fixed to the position of the limiting rod 51 between the connecting parts 422. In this embodiment, the limiting elastic element 52 is a spring, which is coaxially sleeved on the limiting rod 51. One end of the limiting elastic element 52 abuts against the stop plate 54, and the other end abuts against the end of the gripping part 421 near the connecting part 422. By inserting the limiting rod 51 into the drive rod 34, the relative position of the gripping part 421 with respect to the rotating rod 32 is limited, and the position of the gripping part 421 can remain stable when the base 1 is pushed by the handle 3.

[0042] The implementation principle of this embodiment is as follows: the jack is moved to the area below the object to be lifted by the handle 3, the rotating rod 32 is rotated to disengage it from the fixed sleeve rod 31, the fixed sleeve rod 31 is then rotated to be parallel to the axis of the rotating block 27, the rotating rod 32 is passed through the mounting plate 33 and connected to the rotating block 27, the limit rod 51 is pulled by the pull ring 53 to disengage it from the drive rod 34, the grip part 421 is rotated to a vertical position and stepped on, the drive rod 34 is taken out from the receiving groove 322 and connected to the rotating rod 32, the rotating tube 36 is taken out from the relief groove 341 and force is applied to the rotating tube 36 to make the rotating rod 32 rotate, the rotating rod 32 drives the sleeve 22 to rotate, the sleeve 22 drives the lead screw 21 to move toward the object, thereby driving the end of the extension plate 12 away from the fixed sleeve rod 31 to move away from the fixed sleeve rod 31, thereby driving the end of the lifting plate 11 close to the object to rise and lift the object.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A jack with an adjustable handle, comprising a base (1), a lifting plate (11) rotatably connected to the base (1), and an extension plate (12) rotatably connected to one end of the lifting plate (11), wherein the end of the lifting plate (11) away from the extension plate (12) can abut against the lower end of a heavy object, and the rotation axis of the extension plate (12) and the lifting plate (11) is located on the side of the lifting plate (11) away from the heavy object, characterized in that: The base (1) is provided with a drive mechanism (2) for moving the extension plate (12). The drive mechanism (2) includes a lead screw (21) hinged to the extension plate (12), a sleeve (22) rotatably connected to the base (1), a worm wheel (23) coaxially fixed to the sleeve (22), and a worm (24) rotatably connected to the base (1). The sleeve (22) is sleeved outside the lead screw (21) and threadedly connected to the lead screw (21). The worm wheel (23) meshes with the worm (24). A rotating block (27) is coaxially provided on the worm (24). A handle (3) is rotatably connected to the base (1). The handle (3) includes a fixed sleeve rod (31) rotatably connected to the base (1) and a rotating rod (32) passing through the fixed sleeve rod (31). A rotating groove (321) is provided on the end face of the rotating rod (32) near the base (1). The rotating rod (32) can be inserted into the rotating groove (321) and abut against the inner wall of the rotating groove (321). A drive rod (34) is detachably connected to the side wall of the rotating rod (32) away from the base (1). The drive rod (34) is set perpendicular to the rotating rod (32). An extension rod (35) is hinged to the drive rod (34). 5) The hinge axis of the drive rod (34) passes through the axis of the drive rod (34). A rotating tube (36) is coaxially rotatable on the extension rod (35). A relief groove (341) is passed through the side wall of the drive rod (34). The extension rod (35) can rotate into the relief groove (341) and the side wall of the extension rod (35) protrudes from the relief groove (341). A receiving groove (322) is opened on the end face of the rotating rod (32) away from the base (1). The drive rod (34) can be set in the receiving groove (322). The outer wall of the drive rod (34) and the outer wall of the rotating tube (36) can fit against the inner wall of the receiving groove (322). A support mechanism (4) is provided to support the rotating rod (32). The support mechanism (4) includes a sleeve (41) coaxially rotating on the rotating rod (32) and a support member (42) rotatably connected to the sleeve (41). The rotation axis of the support member (42) and the sleeve (41) passes through the axis of the rotating rod (32). The support member (42) can rotate to abut against the ground. The support member (42) includes a gripping part (421) and several connecting parts (422) rotatably connected to the sleeve (41). The connecting parts (422) are located on both sides of the rotating rod (32). The end of the connecting part (422) away from the sleeve (41) is connected to the gripping part. (421) Connection, the grip (421) is located at the end of the rotating rod (32) away from the base (1); the grip (421) is provided with a limiting mechanism (5) that limits the position of the grip (421), the limiting mechanism (5) includes a limiting rod (51) passing through the grip (421) and a limiting elastic member (52) that drives the limiting rod (51) to move toward the rotating rod (32), the limiting rod (51) can pass through the connecting parts (422) and be inserted into the driving rod (34), one end of the limiting elastic member (52) is connected to the grip (421), and the other end of the limiting elastic member (52) is connected to the limiting rod (51).

2. A jack with an adjustable handle according to claim 1, characterized in that: The lower end of the fixed sleeve rod (31) is fixed with several mounting plates (33), the rotating rod (32) can pass through the mounting plate (33), and the rotating rod (32) can be connected to the rotating block (27).

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