Precise lifting platform

Abstract

According to the precise lifting platform, precise height adjustment can be conducted on a heavy object in a low-height space, a lower wedge-shaped plate is arranged on a bottom plate through a limiting groove in the bottom plate and can move on the bottom plate in the axis direction of a screw rod, and a rotary knob is arranged at the end of the screw rod; the first center block close to the rotary knob is placed in the groove of the lower wedge-shaped plate, the second center block far away from the rotary knob is placed in the groove of the upper wedge-shaped plate, the first center block and the second center block are arranged between the lower wedge-shaped plate and the upper wedge-shaped plate, and the screw penetrates through the threaded through hole of the first center block and the smooth through hole of the second center block. Threads are arranged on the screw rod at the position of the first center block, and a polished rod is arranged on the screw rod at the position of the second center block. An adjusting structure combining the screw and the wedge-shaped structure is adopted, precise height adjustment of a heavy object in a low-height space is achieved through relative movement between the lower wedge-shaped plate and the upper wedge-shaped plate, and the precise height adjusting device can be widely applied to the industries of precise machining, precise automation and the like.

Description

Technical Field

[0001] The invention relates to the field of precision mechanical adjustment, and in particular to a precision lifting platform. Background Art

[0002] The accuracy of precision machining equipment has an important impact on its value, and the fine-tuning of certain component coordinates during machining will make the machining error control and machining stroke have a larger controllable redundant range. Since precision machining equipment generally takes into account the impact of vibration during operation on the error of workpiece machining, it will use a larger component mass to reduce the vibration of the machine, but this also puts higher requirements on the adjustment of the components. At the same time, due to the initial space design of some equipment, it is impossible to use an adjustment device that is too large in size. This requires a three-dimensional adjustment device that can bear a certain weight in a limited space. At present, only adjustment devices in two directions on the horizontal plane can meet the above requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a precision lifting platform which can precisely adjust the height of heavy objects in a relatively low height space.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a precision lifting platform, including a base plate, a lower wedge plate, an upper wedge plate, a screw, a first center block and a second center block, the lower wedge plate is arranged on the base plate through a limiting groove on the base plate and can move on the base plate along the axial direction of the screw, a knob is arranged on the end of the screw, the first center block close to the knob is placed in the groove of the lower wedge plate, the second center block away from the knob is placed in the groove of the upper wedge plate, and the first center block and the second center block are arranged between the lower wedge plate and the upper wedge plate, the first center block has a threaded through hole in the center, the second center block has a smooth through hole in the center, the screw passes through the threaded through hole of the first center block and the smooth through hole of the second center block, the screw is provided with a thread at the position of the first center block and the thread is clearance-matched with the threaded through hole, and the screw is a smooth rod at the position of the second center block.

[0005] Furthermore, it also includes a screw bracket, which is arranged at the end position of the base plate, and one end of the screw with a knob is arranged on the screw bracket.

[0006] Furthermore, the first center block is connected to the lower wedge plate by a lubricating gap assembly, the second center block is connected to the upper wedge plate by a lubricating gap assembly, and the lower wedge plate is connected to the bottom plate by a lubricating gap assembly.

[0007] Furthermore, the included angle α between the upper and lower planes of the lower wedge-shaped plate and the upper wedge-shaped plate is 1 to 30°, preferably 1 to 15°.

[0008] Furthermore, the angle α between the upper and lower planes of the lower wedge plate is the same as the angle α between the upper and lower planes of the upper wedge plate, and the lower wedge plate and the upper wedge plate are arranged opposite to each other, so that the lower plane of the lower wedge plate is parallel to the upper plane of the upper wedge plate.

[0009] Furthermore, an annular retaining device is provided at the front and rear positions of the smooth through hole of the second center block to prevent the second center block and the smooth rod portion of the screw from generating axial relative displacement.

[0010] Furthermore, the smooth rod portion of the screw rod is clearance-matched with the smooth through hole of the second center block and the screw rod can rotate in the smooth through hole.

[0011] Furthermore, the axis of the threaded through hole of the first center block coincides with the axis of the smooth through hole of the second center block, and in the axial direction, the groove width of the lower wedge plate and the upper wedge plate is the same as that of the first center block and the second center block.

[0012] Furthermore, the rotation of the screw causes the first center block to move forward and backward along the screw, driving the lower wedge plate to move on the bottom plate along the axial direction of the screw, causing the upper wedge plate to change in height relative to the bottom plate.

[0013] The beneficial effect of the present invention is that the adjustment structure combining the screw and the wedge structure is adopted, and the relative movement between the lower wedge plate and the upper wedge plate is used to achieve precise height adjustment of heavy objects in a relatively low height space, which can be widely used in industries such as precision machining and precision automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the precision lifting platform of the present invention.

[0015] Figure 2 It is a front view of the precision lifting platform of the present invention.

[0016] Figure 3 yes Figure 2 AA section view.

[0017] Figure 4 yes Figure 2 Bottom view of .

[0018] Figure 5 yes Figure 4 Right view of .

[0019] Figure 6 It is a front view of the lower wedge plate of the precision lifting platform of the present invention.

[0020] Figure 7 yes Figure 6 BB cross-sectional view.

[0021] Figure 8 It is a front view of the upper wedge plate of the precision lifting platform of the present invention.

[0022] Fig. 9 yes Figure 8 CC cross-sectional view.

[0023] Fig.10 It is a front view of the first central block of the precision lifting platform of the present invention.

[0024] Fig.11 yes Fig.10 Top view of the .

[0025] Fig.12 It is a front view of the second central block of the precision lifting platform of the present invention.

[0026] Fig.13 It is a stereoscopic diagram of the screw of the precision lifting platform of the present invention. DETAILED DESCRIPTION

[0027] like Figure 1-13 As shown, the precision lifting platform of the present invention comprises a bottom plate 1, a lower wedge plate 2, an upper wedge plate 3, a screw bracket 4, a screw 5, a first center block 6 and a second center block 7, wherein the lower wedge plate 2 is arranged on the bottom plate 1 through a limiting groove on the bottom plate 1, the screw bracket 4 is arranged at the end position of the bottom plate 1, a knob 9 is arranged at the end of the screw 5, the first center block 6 is placed in the groove of the lower wedge plate 2, the second center block 7 is placed in the groove of the upper wedge plate 3, and the first center block 6 and the second center block 7 are arranged on the lower wedge plate 2 and Between the upper wedge plates 3, wherein the first center block 6 is close to the knob 9, and the second center block 7 is far away from the knob 9, the first center block 6 has a threaded through hole 8 in the center, and the second center block 7 has a smooth through hole 11 in the center, the screw 5 passes through the threaded through hole 8 of the first center block 6 and the smooth through hole 11 of the second center block 7, and one end of the screw 5 with the knob 9 is arranged on the screw bracket 4, the screw 5 is provided with a thread at the position of the first center block 6, and the thread is clearance-matched with the threaded through hole 8, and the screw 5 is a smooth rod at the position of the second center block 7.

[0028] Both the first center block 6 and the second center block 7 are provided with raised strips 10, and the raised strips 10 have three functions. The first is the guiding function. Under the dual guiding function of the screw bracket 4 and the raised strips 10, the horizontal deviation of the axis of the screw 5 caused by the large mass pressure of the workpiece lifted at the upper end is avoided; the second is to reduce the height difference between the axis of the screw 5 on the second center block 7 and the table surfaces on both sides of the raised strips 10, that is, on the basis of not affecting the openings of the first center block 6 and the second center block 7, the first center block 6 and the second center block 7 are designed to be thinner as much as possible to obtain a higher displacement, because the first center block 6 will move back and forth when the screw 5 rotates, and the edge of the second center block 7 cannot touch the lower wedge plate 2; the third is that when the screw 5 rotates, the raised strips 10 can prevent the first center block 6 and the second center block 7 from rotating with the screw 5.

[0029] The first center block 6 and the second center block 7 are respectively connected to the lower wedge plate 2 and the upper wedge plate 3 by lubricating clearance assembly, and the lower wedge plate 2 and the bottom plate 1 are also connected by lubricating clearance assembly, rather than fixed connection. The front and rear positions of the smooth through hole 11 of the second center block 7 are provided with an annular clamping device to prevent the second center block 7 and the smooth rod part of the screw 5 from axial relative displacement. The smooth rod part of the screw 5 is clearance-matched with the smooth through hole 11 of the second center block 7, and the screw 5 can rotate in the smooth through hole 11. The groove width of the lower wedge plate 2 and the upper wedge plate 3 is the same as that of the first center block 6 and the second center block 7. The threaded through hole 8 of the first center block 6 coincides with the axis of the smooth through hole 11 of the second center block 7, and in the axial direction, the first center block 6 and the second center block 7 are respectively close to the groove walls of the lower wedge plate 2 and the upper wedge plate 3.

[0030] The present invention performs non-standard processing on the threads of the screw 5 and the threaded through hole 8 to make the threads finer and denser, and all of them are fine-pitch threads. At the same time, the tooth tips of the threads of the screw 5 are tooth-quenched to improve the strength, so that more precise height adjustment of the lifted workpiece can be achieved, and the accuracy can reach the micron level. The threads of the screw 5 and the threaded through hole 8 adopt a clearance fit with a high-precision tolerance (such as 4H5H / 4h6h, etc.), and the screw 5 has only one rotational degree of freedom and no other directional degrees of freedom. The size of the angle α between the upper and lower planes of the lower wedge plate 2 and the upper wedge plate 3 is related to the weight of the lifted workpiece and the strength of the threads. Therefore, the angle α between the upper and lower planes of the lower wedge plate 2 and the upper wedge plate 3 is 1 to 30°, preferably 1 to 15°. The angle α between the upper and lower planes of the lower wedge plate 2 is the same as the angle α between the upper and lower planes of the upper wedge plate 3, and the lower wedge plate 2 and the upper wedge plate 3 are arranged opposite to each other, so that the lower plane of the lower wedge plate 2 (the plane in contact with the bottom plate 1) and the upper plane of the upper wedge plate 3 (the plane in contact with the lifted workpiece) are parallel. When the lifted workpiece is light, the angle α between the upper and lower planes of the lower wedge plate 2 and the upper wedge plate 3 can be 30°, and the thread pitch and thread strength can also be appropriately changed. Shallow grooves are also arranged on the lower wedge plate 2 and the upper wedge plate 3, whose main function is to avoid air pressure relief and have no mechanical assembly function.

[0031] During operation, the base plate 1 is connected and fixed to the machine, and the base plate 1 has no displacement relative to the machine. The upper wedge plate 2 is connected to the lifted workpiece by bolts. The knob 9 is twisted to rotate the screw rod 5, and the first center block 6 moves back and forth along the screw rod 5, thereby driving the lower wedge plate 2 to move along the axis direction of the screw rod 5 on the base plate 1, while the second center block 7 and the upper wedge plate 2 are stationary relative to the screw rod 5. Since the upper and lower planes of the lower wedge plate 2 and the upper wedge plate 3 have an angle α, the lower wedge plate 2 causes the upper wedge plate 3 to change in height relative to the base plate 1 during the movement, thereby achieving precise height changes of the lifted workpiece installed on the upper wedge plate 2.

[0032] The present invention innovatively adopts an adjustment structure that combines a screw and a wedge structure, so that the upper limit of the mass that the precision lifting platform can bear is increased, and objects with larger mass can be adjusted for displacement in the height direction; the upper wedge plate 3 is fixedly assembled with the lifted workpiece, and the upper wedge plate 2 is stationary relative to the screw 5 during the rotation of the screw 5, so that relative horizontal displacement between the lifted workpiece and the equipment body can be avoided; by using the wedge structure composed of the lower wedge plate 2 and the upper wedge plate 3, the commonly existing problem of excessive volume of the height adjustment device can be minimized, and it can be applied to equipment that needs precise height adjustment in a relatively limited space, including precision machining industry, precision automation industry and other industries.

Claims

1. Precision lifting platform, characterized by: The invention comprises a bottom plate (1), a lower wedge plate (2), an upper wedge plate (3), a screw rod (5), a first center block (6) and a second center block (7); the lower wedge plate (2) is arranged on the bottom plate (1) through a limiting groove on the bottom plate (1) and can move on the bottom plate (1) along the axial direction of the screw rod (5); a knob (9) is arranged at the end of the screw rod (5); the first center block (6) close to the knob (9) is placed in the groove of the lower wedge plate (2); the second center block (7) far from the knob (9) is placed in the groove of the upper wedge plate (3); and the first center block (6) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the second center block (7) is arranged on the bottom plate (1) and the first center block (6 ... first center block (7) is arranged on the bottom plate (1) and the The first center block (6) and the second center block (7) are arranged between the lower wedge plate (2) and the upper wedge plate (3); the first center block (6) has a threaded through hole (8) at its center, and the second center block (7) has a smooth through hole (11) at its center; the screw rod (5) passes through the threaded through hole (8) of the first center block (6) and the smooth through hole (11) of the second center block (7); a thread is arranged on the screw rod (5) at the position of the first center block (6) and the thread is loosely matched with the threaded through hole (11); the screw rod (5) is a smooth rod at the position of the second center block (7).

2. The precision lifting platform according to claim 1, characterized in that: The first central block (6) and the second central block (7) are both provided with raised strips (10) for preventing the first central block (6) and the second central block (7) from rotating along with the screw rod (5).

3. The precision lifting platform according to claim 1 or 2, characterized in that: It also comprises a screw support (4), wherein the screw support (4) is arranged at the end position of the base plate (1), and one end of the screw (5) having a knob (9) is arranged on the screw support (4).

4. The precision lifting platform according to claim 1 or 2, characterized in that: The first center block (6) and the lower wedge plate (2) are connected by a lubricating gap assembly, the second center block (7) and the upper wedge plate (3) are connected by a lubricating gap assembly, and the lower wedge plate (2) and the bottom plate (1) are connected by a lubricating gap assembly.

5. The precision lifting platform according to claim 1 or 2, characterized in that: The included angle α between the upper and lower planes of the lower wedge-shaped plate (2) and the upper wedge-shaped plate (3) is 1 to 30°, preferably 1 to 15°.

6. The precision lifting platform according to claim 1 or 2, characterized in that: The angle α between the upper and lower planes of the lower wedge plate (2) is the same as the angle α between the upper and lower planes of the upper wedge plate (3), and the lower wedge plate (2) and the upper wedge plate (3) are arranged opposite to each other, so that the lower plane of the lower wedge plate (2) and the upper plane of the upper wedge plate (3) are parallel.

7. The precision lifting platform according to claim 1 or 2, characterized in that: An annular locking device is provided at the front and rear positions of the smooth through hole (11) of the second central block (7) to prevent the second central block (7) and the smooth rod portion of the screw rod (5) from generating axial relative displacement.

8. The precision lifting platform according to claim 1 or 2, characterized in that: The smooth rod portion of the screw rod (5) is clearance-matched with the smooth through hole (11) of the second center block (7), and the screw rod (5) can rotate in the smooth through hole (11).

9. The precision lifting platform according to claim 1 or 2, characterized in that: The axis of the threaded through hole (8) of the first center block (6) coincides with the axis of the smooth through hole (11) of the second center block (7), and in the axial direction, the width of the groove of the lower wedge plate (2) and the upper wedge plate (3) is the same as that of the first center block (6) and the second center block (7).

10. The precision lifting platform according to claim 1 or 2, characterized in that: The screw (5) rotates to cause the first central block (6) to move forward and backward along the screw (5), driving the lower wedge plate (2) to move on the bottom plate (1) along the axis of the screw (5), causing the upper wedge plate (3) to change in height relative to the bottom plate (1).

Images