Hand jack
By increasing the contact surface between the outer and inner support components in the hand-cranked jack, the instability problem caused by the upward shift of the screw's center of gravity was solved, thus improving the service life and stability.
Patent Information
- Application Number
- CN202423249972.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-27
AI Technical Summary
When lifting objects, the center of gravity of the screw in a hand-cranked jack tends to shift upwards, which can easily cause the jack to tip over and the screw to deform, thus reducing its service life.
A hand-cranked jack was designed, which consists of an outer support component fitted over an inner support component, and an adjustment assembly that drives the outer support component to slide up and down as a whole. Both the inner and outer walls of the inner support component guide and support the outer support component, increasing the contact surface and improving stability.
By increasing the contact surface, the screw is prevented from deforming due to the increased center of gravity caused by elongation, thus improving the service life and stability of the jack.
Smart Images
Figure CN223576016U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lifting tool technical field, concretely relates to hand-operated jack. BACKGROUND
[0002] The existing hand-operated jack includes the top lifting part and the support part, the top lifting part is located in the support part, the lower end of the top lifting part is connected with the screw rod, the screw rod is connected with the bevel gear in the support part, the bevel gear rotates, the bevel gear drives the screw rod to rotate, the screw rod drives the top lifting part to move up and down, because the top lifting part moves up when lifting the object, the screw rod gravity position moves up, the screw rod mostly extends the support part, the top lifting part is only connected with the support part through the screw rod, is easy to cause the jack to fall down, and is easy to cause the screw rod to deform, reduces the service life. SUMMARY
[0003] In order to overcome the insufficient of prior art, the utility model discloses hand-operated jack, increases the contact surface, improves the stability of the jack when lifting.
[0004] The utility model employs the technical scheme as follows: hand-operated jack, including adjusting assembly, inner support piece, the hollow outer support piece for lifting object, the outer support piece is set on the inner support piece, and with the outer surface contact of inner support piece, the adjusting assembly is used for driving the whole outer support piece slide up and down, when the whole outer support piece slide up and down, the inner wall and the outer wall of inner support piece are all to the outer support piece guide support.
[0005] Compared with the prior art, the utility model has the beneficial effects that:
[0006] The outer support piece of the utility model is set on the inner support piece, and the outer support piece is in contact with the outer surface of the inner support piece, when lifting the object, the adjusting assembly is operated, the adjusting assembly drives the whole outer support piece to slide up (or slide down), the inner wall and the outer wall of the inner support piece are all to the outer support piece guide support, so that the outer support piece is in contact with the inner wall of the inner support piece, and the outer support piece is in contact with the outer wall of the inner support piece, that is, the contact surface is increased, so that the stability of the jack itself when lifting can be improved.
[0007] As the preferred embodiment of the utility model, the adjusting assembly includes the first bevel gear arranged in the outer support, the second bevel gear meshed with the first bevel gear, the screw rod rotationally connected with the outer support, the upper end of the screw rod is fixedly connected with the second bevel gear, the lower end of the screw rod extends into the inner support and is threadedly connected with the inner wall of the inner support, the first bevel gear rotates, the first bevel gear drives the second bevel gear to rotate in the horizontal plane, the second bevel gear drives the screw rod to rotate in the horizontal plane, the screw rod cooperates with the inner support, the screw rod drives the outer support to move upwards, and the outer support lifts the object.
[0008] In the scheme, the first bevel gear and the second bevel gear are meshed, the first bevel gear drives the second bevel gear to rotate in the horizontal plane, the second bevel gear is fixedly connected with the screw rod, the second bevel gear drives the screw rod to rotate, the screw rod moves linearly along the axial direction of the connecting piece when rotating, and the screw rod drives the outer support to slide up and down when moving linearly along the axial direction of the connecting piece.
[0009] Beneficial effects: the screw rod extends into the inner support and is threadedly connected with the inner wall of the inner support, the screw rod can drive the outer support to slide up and down when rotating, the screw thread and the inner support can limit the outer support when the screw rod stops rotating, the outer support is always in contact with the outer surface of the inner support when the screw thread is threadedly connected with the inner wall of the inner support, the outer support is also in surface contact with the inner support in addition to the connection between the screw rod and the inner support, the contact surface is increased, the screw rod is prevented from deforming due to the increase of the center of gravity caused by elongation, and the service life is improved; and compared with the case that the lifting part is located inside the inner support, the lifting part needs to be connected with the inner support through the screw rod, the screw rod is always located inside the inner support, the lifting height of the outer support in the scheme is higher with the same length of the screw rod.
[0010] As the preferred embodiment of the utility model, the adjusting assembly further includes a limiting piece for limiting the screw rod, the limiting piece is fixedly connected with the inner wall of the outer support, the second bevel gear is in contact with the upper surface of the limiting piece, the first connecting hole is arranged along the radial direction of the second bevel gear, the second connecting hole coaxial with the first connecting hole is arranged along the radial direction of the screw rod, the second bevel gear and the screw rod are connected through the pin arranged in the first connecting hole and the second connecting hole, the pin is in contact with the upper surface of the limiting piece, the screw rod penetrates the limiting piece, the smooth section of the screw rod is rotationally connected with the limiting piece, and the toothed section of the screw rod is in contact with the lower surface of the limiting piece at the connecting position with the smooth section.
[0011] Beneficial effects: the second bevel gear and the screw are connected through the pin, the pin is attached to the upper surface of the limiting piece, the connecting place of the toothed section and the smooth section of the screw is attached to the lower surface of the limiting piece, that is, the screw is limited by the limiting piece through the pin and the upper end of the toothed section of the screw, the position of the screw is limited, so that the second bevel gear is also limited, the screw is stably connected with the limiting piece, the screw rotates, the screw can drive the limiting piece to move up and down, so that the outer supporting piece can be driven to slide up and down through the limiting piece.
[0012] As a preferred embodiment of the utility model, the inner supporting piece is hollow, the adjusting assembly further comprises a connecting piece threadedly connected with the screw, and the connecting piece is arranged inside the upper end of the inner supporting piece.
[0013] Beneficial effects: the inner supporting piece is hollow and can be threadedly connected with the screw through the connecting piece, so that the use of the inner supporting piece can be reduced.
[0014] As a preferred embodiment of the utility model, the adjusting assembly further comprises a crank handle, one end of the crank handle penetrates the outer supporting piece along the radial direction of the outer supporting piece and is located outside the outer supporting piece, the crank handle is rotationally connected with the outer wall of the outer supporting piece, the crank handle is fixedly connected with the first bevel gear, the crank handle drives the first bevel gear to rotate in the vertical plane, the first bevel gear drives the second bevel gear to rotate in the horizontal plane, the second bevel gear drives the screw to rotate in the horizontal plane, the screw cooperates with the inner supporting piece, and the screw drives the outer supporting piece to move upwards.
[0015] Beneficial effects: one end of the crank handle penetrates the outer supporting piece along the radial direction of the outer supporting piece and is located outside the outer supporting piece, the crank handle has two connecting points with the outer supporting piece, and the connecting stability of the crank handle and the outer supporting piece can be enhanced.
[0016] As a preferred embodiment of the utility model, the first bevel gear is hollow and is sleeved on the crank handle, the two ends of the first bevel gear are respectively abutted against the inner walls of the outer supporting piece, the first bevel gear and the crank handle are connected through the pin, and the rotationally connected places of the outer supporting piece and the crank handle are all provided with reinforcing portions, and the reinforcing portions are respectively abutted against the outer ends of the first bevel gear.
[0017] Beneficial effects: the two ends of the first bevel gear are respectively abutted against the inner walls of the outer supporting piece, that is, the first bevel gear is additionally limited, the effective meshing of the first bevel gear and the second bevel gear is ensured, and the connecting strength of the connecting place of the crank handle and the outer supporting piece can be enhanced.
[0018] As a preferred embodiment of the utility model, the crank handle comprises a first connecting rod, a second connecting rod and a third connecting rod which are respectively located at the two ends of the first connecting rod and face opposite directions and are both perpendicular to the first connecting rod, the second connecting rod penetrates the outer supporting piece and is rotationally connected with the outer supporting piece.
[0019] As the preferred embodiment of the utility model, the upper cover is detachably connected with the outer support.
[0020] Beneficial effect: the inside part of the outer support can be conveniently viewed, and the first bevel gear and the handlebar mounting pin can be conveniently limited.
[0021] As the preferred embodiment of the utility model, the outer wall of the outer support is provided with a top lifting piece, and two third connecting holes are arranged on the top lifting piece and arranged upwards and downwards.
[0022] Beneficial effect: the connecting frame is arranged behind the micro tiller, the connecting holes for connecting the machine tool are arranged on the connecting frame, the third connecting holes on the top lifting piece are matched with the top lifting piece, the top lifting piece can be connected with the connecting frame through the connecting holes and the third connecting holes, the jack and the connecting frame are stably connected, and the micro tiller is stably lifted.
[0023] As the preferred embodiment of the utility model, the base is hollow, and the inner support penetrates through the base.
[0024] Beneficial effect: the base supports the inner support, increases the contact surface of the inner support and the ground, the inner support penetrates through the hollow base, the base is hollow, the inner support is connected with the upper surface and the lower surface of the base, the inner support and the base are in contact and fixed on two different planes, and the stability of the base and the inner support is improved. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a structural schematic view of the hand-operated jack of the utility model;
[0026] Figure 2 is a structural schematic view of the hand-operated jack of the utility model from another angle;
[0027] Figure 3 is a structural schematic view of the hand-operated jack of the utility model from another angle;
[0028] Figure 4 is a structural schematic view of the hand-operated jack of the utility model from another angle. DETAILED DESCRIPTION
[0029] The typical embodiment embodying the characteristics and advantages of the utility model will be described in detail in the following description. It should be understood that the utility model can have various changes on different embodiments, which all do not deviate from the scope of the utility model, and the description and drawings in the embodiment are essentially used for description, rather than for limiting the utility model.
[0030] In the description of the present application, the terms "first", "second", "one side" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the structure referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0031] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.
[0032] The reference signs include: base 1, inner support 2, outer support 3, crank 401, first bevel gear 402, second bevel gear 403, screw rod 404, connecting piece 405, limiting piece 406, reinforcing part 5, upper cover 6, jacking piece 7.
[0033] The hand-operated jack, as shown in Figure 1 , The hand-operated jack, as shown in 2 , comprises an adjusting assembly for driving the outer support 3 to slide up and down as a whole, a base 1, a hollow inner support 2, a hollow outer support 3 for jacking an object, and an upper cover 6 arranged at the top of the outer support 3. The lower end of the inner support 2 is connected to the base 1. The outer support 3 is sleeved on the inner support 2 and in contact with the outer surface of the inner support 2. When the outer support 3 slides up and down as a whole, the inner wall and the outer wall of the inner support 2 guide and support the outer support 3.
[0034] As shown in Figure 3 , the base 1 is hollow, and the inner support 2 penetrates the base 1. In this embodiment, the base 1 can be a circular table, a cube, or a cylinder. The inner support 2 can be a cylinder or a column with a polygonal cross section, such as a square or a hexagonal column. In this embodiment, when the outer support 3 slides up and down, the operator can step on the base 1 to limit the inner support 2.
[0035] As shown in Figure 2 , 3 , the outer support 3 is detachably connected to the upper cover 6. In this embodiment, the upper cover 6 can be directly sleeved and clamped on the outer support 3. The outer wall of the outer support 3 is provided with a jacking piece 7. The jacking piece 7 is hollow and provided with two third connecting holes arranged along the outer support 3. The outer support 3 is symmetrically provided with two reinforcing parts 5. In this embodiment, the outer support 3 can be a cylinder or a column with a polygonal cross section, such as a square or a hexagonal column. The reinforcing part 5 can be a bearing or a square block with a through hole.
[0036] The adjusting assembly comprises a crank 401, a first bevel gear 402 arranged in the outer support 3, a second bevel gear 403 engaged with the first bevel gear 402, a screw rod 404, a connecting piece 405 threadedly connected to the screw rod 404, and a limiting piece 406.
[0037] The rocking handle 401 comprises a first connecting rod, a second connecting rod and a third connecting rod located at two opposite ends of the first connecting rod respectively and perpendicular to the first connecting rod, the second connecting rod and the third connecting rod are connected with the first connecting rod respectively and the connection portions are circularly transitioned, one end of the second connecting rod penetrates the outer support 3 radially and is located outside the outer support 3, and is rotationally connected with the outer wall of the outer support 3, the second connecting rod is fixedly connected with the first bevel gear 402, and the third connecting rod is sleeved with a rubber sleeve.
[0038] In the embodiment, the first bevel gear 402 is hollow and sleeved on the second connecting rod, the second connecting rod and the first bevel gear 402 are pinned, two ends of the first bevel gear 402 abut against the inner wall of the outer support 3 respectively, two reinforcing portions 5 are located at the rotationally connected portions of the outer support 3 and the second connecting rod respectively, the two reinforcing portions 5 abut against the outer ends of the first bevel gear 402 respectively, and the second connecting rod penetrates the two reinforcing portions 5 and is rotationally connected with the reinforcing portions 5.
[0039] As shown in Figure 4 The limiting piece 406 is fixedly connected with the inner wall of the outer support 3, the second bevel gear 403 is attached to the upper surface of the limiting piece 406, the second bevel gear 403 is hollow, one end of the screw 404 extends into the second bevel gear 403, the first connecting hole is arranged on the second bevel gear 403 radially, the second connecting hole coaxial with the first connecting hole is arranged on the screw 404 radially, the second bevel gear 403 and the screw 404 are connected through the pin arranged in the first connecting hole and the second connecting hole, the pin is attached to the upper surface of the limiting piece 406, the screw 404 penetrates the limiting piece 406, the smooth section of the screw 404 is rotationally connected with the limiting piece 406, the connecting portion between the toothed section and the smooth section of the screw 404 is attached to the lower surface of the limiting piece 406, the lower surface of the limiting piece 406 can abut against the upper surface of the connecting piece 405, the connecting piece 405 is threadedly connected with the screw 404, the connecting piece 405 is arranged inside the upper end of the inner support 2, and the connecting piece 405 is fixedly connected with the inner wall of the inner support 2. In the embodiment, the limiting piece 406 is a limiting block with a threaded hole.
[0040] In the embodiment, the rotating handle 401 is rotated, the second connecting rod drives the first bevel gear 402 to rotate in the vertical plane, the first bevel gear 402 meshes with the second bevel gear 403, the first bevel gear 402 drives the second bevel gear 403 to rotate in the horizontal plane, the second bevel gear 403 is fixedly connected with the screw rod 404, the second bevel gear 403 drives the screw rod 404 to rotate in the horizontal plane, the screw rod 404 is threadedly connected with the connecting piece 405, the screw rod 404 drives the limiting piece 406 to slide upward, the limiting piece 406 is fixedly connected with the outer supporting piece 3, the screw rod 404 drives the outer supporting piece 3 to slide upward through the limiting piece 406, when the outer supporting piece 3 slides upward, the inner wall of the inner supporting piece 2 guides and supports the outer supporting piece 3, the outer supporting piece 3 drives the jacking piece 7 to move upward, the jacking piece 7 lifts the object, the rotating handle 401 is stopped, the screw rod 404 is threadedly connected with the connecting piece 405, the screw rod 404 is self-locking, the position of the outer supporting piece 3 is limited, and the jacking piece 7 stably jacks the object.
[0041] The above embodiment is only a preferred embodiment of the utility model, and cannot be used to limit the range of the utility model protection, and any non-substantial change and replacement made by the person skilled in the art on the basis of the utility model belongs to the range of the utility model protection.
Claims
1. A hand-operated jack characterised in that: The adjusting assembly, the inner support, the hollow outer support for lifting the object, the outer support is sleeved on the inner support and in contact with the outer surface of the inner support, the adjusting assembly is used to drive the outer support to slide up and down as a whole, when the outer support slides up and down as a whole, the inner wall of the inner support and the outer wall are both guided and supported by the outer support; The adjusting assembly comprises a first bevel gear arranged in the outer support, a second bevel gear meshing with the first bevel gear, and a screw rod rotationally connected with the outer support, the upper end of the screw rod is fixedly connected with the second bevel gear, the lower end of the screw rod extends into the inner support and is threadedly connected with the inner wall of the inner support, the first bevel gear rotates, the first bevel gear drives the second bevel gear to rotate in the horizontal plane, the second bevel gear drives the screw rod to rotate in the horizontal plane, the screw rod cooperates with the inner support, the screw rod drives the outer support to move upwards, and the outer support lifts the object; Or the adjusting assembly comprises a second bevel gear arranged in the outer support and a screw rod rotationally connected with the outer support, the upper end of the screw rod is fixedly connected with the second bevel gear, the lower end of the screw rod extends into the inner support and is threadedly connected with the inner wall of the inner support, the second bevel gear rotates in the horizontal plane, the second bevel gear drives the screw rod to rotate in the horizontal plane, the screw rod cooperates with the inner support, the screw rod drives the outer support to move upwards, and the outer support lifts the object.
2. A hand pump jack according to claim 1, characterised in that: The adjusting assembly further comprises a limiting piece for limiting the screw rod, the limiting piece is fixedly connected with the inner wall of the outer support, the second bevel gear is in contact with the upper surface of the limiting piece, a first connecting hole is arranged in the radial direction of the second bevel gear, a second connecting hole coaxial with the first connecting hole is arranged in the radial direction of the screw rod, the second bevel gear and the screw rod are connected by a pin arranged in the first connecting hole and the second connecting hole, the pin is in contact with the upper surface of the limiting piece, the screw rod penetrates the limiting piece, a smooth section of the screw rod is rotationally connected with the limiting piece, and a toothed section of the screw rod is in contact with the lower surface of the limiting piece.
3. The hand pump jack of claim 1, wherein: The inner support is hollow, and the adjusting assembly further comprises a connecting piece threadedly connected with the screw rod, the connecting piece is arranged inside the upper end of the inner support.
4. The hand pump jack of claim 1, wherein: The adjusting assembly further comprises a crank handle, one end of the crank handle penetrates the outer support in the radial direction of the outer support and is located outside the outer support, the crank handle is rotationally connected with the outer wall of the outer support, the crank handle is fixedly connected with the first bevel gear, the crank handle drives the first bevel gear to rotate in the vertical plane, the first bevel gear drives the second bevel gear to rotate in the horizontal plane, the second bevel gear drives the screw rod to rotate in the horizontal plane, the screw rod cooperates with the inner support, and the screw rod drives the outer support to move upwards.
5. A hand pump jack according to claim 4, wherein: The first bevel gear is hollow and is sleeved on the crank handle, the two ends of the first bevel gear are respectively in contact with the inner wall of the outer support, the first bevel gear and the crank handle are connected by a pin, and the rotationally connected parts of the outer support and the crank handle are both provided with reinforcing parts, and the reinforcing parts are respectively in contact with the outer ends of the first bevel gear.
6. The hand pump jack of claim 4, wherein: The crank handle comprises a first connecting rod, a second connecting rod and a third connecting rod which are respectively located at the two ends of the first connecting rod and are opposite to each other and perpendicular to the first connecting rod, and the second connecting rod penetrates the outer support and is rotationally connected with the outer support.
7. The hand pump jack of claim 1, wherein: Further comprising an upper cover arranged on the top of the outer support, the upper cover being detachably connected with the outer support.
8. The hand pump jack of claim 1, wherein: The outer wall of the outer support is provided with a top lifting piece, and the top lifting piece is provided with two third connecting holes arranged along the upper and lower portions of the outer support.
9. The hand pump jack of claim 1, wherein: Further comprising a base, the base being hollow, and the inner support penetrating through the base.
Citation Information
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