Damping device

Abstract

The utility model belongs to the technical field of damping devices, and particularly relates to a damping device which comprises a main shaft, a shaft sleeve and an adjusting ring, the shaft sleeve is provided with a shaft hole, the main shaft is assembled in the shaft hole of the shaft sleeve in an interference mode, the shaft sleeve is of a flexible structure, the shaft hole comprises a first end and a second end, and an adjusting block is arranged on the peripheral face of the shaft sleeve. The adjusting block extends in the axial direction of the shaft sleeve, the side, opposite to the main shaft, of the adjusting block is an inclined face, the inclined face inclines from the first end to the second end, the adjusting ring is provided with an adjusting hole, the adjusting ring is arranged on the shaft sleeve in a sleeving mode, and the inner wall face of the adjusting hole makes contact with the inclined face. The adjusting ring is moved up and down to adjust the inner diameter of the shaft sleeve, so that the damping force between the main shaft and the shaft sleeve is stabilized in a required range, and the stability of the damping force of the damping device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of damping devices, and particularly relates to a damping device. Background Art

[0002] A damping device is a device that provides resistance to motion to dissipate motion energy.

[0003] An existing damping device includes a main shaft and a bushing. The bushing is sleeved on the main shaft, and the bushing and the main shaft are in interference fit. An oil groove is provided on the inner peripheral surface of the bushing, and lubricating oil is contained in the oil groove. When the main shaft deflects relative to the bushing, frictional damping will be formed between the main shaft and the bushing. The damping device is installed between two workpieces, the main shaft is connected to the first workpiece, and the bushing is connected to the second workpiece. When the first workpiece and the second workpiece rotate relative to each other, the frictional damping generated between the main shaft and the bushing can slow down the relative rotation between the main shaft and the bushing, thereby slowing down the relative rotation between the two workpieces.

[0004] For the existing damping device, when the temperature changes between high and low, the main shaft is prone to thermal expansion and contraction, which causes the interference amount between the main shaft and the bushing to change, resulting in unstable damping force between the main shaft and the bushing. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the problem of unstable damping force between the main shaft and the bushing of the existing damping device, a damping device is provided.

[0006] To solve the above technical problem, an embodiment of the utility model provides a damping device, which includes a main shaft, a bushing and an adjusting ring. The bushing has a shaft hole, the main shaft is in interference fit in the shaft hole of the bushing, the bushing is a flexible structure, the shaft hole includes a first end and a second end, an adjusting block is provided on the outer peripheral surface of the bushing, the adjusting block extends along the axial direction of the bushing, the side of the adjusting block facing away from the main shaft is an inclined surface, and the inclined surface is inclined from the first end to the second end. The adjusting ring is provided with an adjusting hole, the adjusting ring is sleeved on the bushing, and the inner wall surface of the adjusting hole is in contact with the inclined surface.

[0007] Optionally, an adjusting groove is provided on the hole edge of the first end.

[0008] Optionally, a plurality of adjusting blocks are provided, and the plurality of adjusting blocks are evenly distributed at intervals on the outer peripheral surface of the bushing.

[0009] Optionally, it further includes a driving mechanism, the bushing is connected to the driving mechanism, and the driving mechanism can drive the adjusting ring to move in a direction close to or away from the first end.

[0010] Optionally, the driving mechanism includes a driving block connected to the outer peripheral surface of the adjusting ring. One side surface of the driving block facing the first end is a driving surface, which is a slope surface. A spiral mating surface is provided at the orifice of the adjusting hole away from the first end. The slope surface contacts the spiral mating surface, and the spiral mating surface is tangent to the slope surface.

[0011] Optionally, there are two driving blocks, namely a first driving block and a second driving block. The first driving block and the second driving block are arranged at intervals. The spiral mating surface has two sections, namely a first spiral mating surface and a second spiral mating surface. The helix directions of the first spiral mating surface and the second spiral mating surface are the same. The first spiral mating surface and the second spiral mating surface are connected end to end. A first stop step is provided between the head end of the first spiral mating surface and the tail end of the second spiral mating surface. A second stop step is provided between the tail end of the first spiral mating surface and the head end of the second spiral mating surface. The first stop step is in stop cooperation with the first driving block, and the second stop step is in stop cooperation with the second driving block.

[0012] Optionally, an arc-shaped protrusion is provided on the slope surface, and a plurality of arc-shaped grooves are provided on the spiral mating surface. Adjacent two arc-shaped grooves are connected. The arc-shaped protrusion can slide from one arc-shaped groove into another arc-shaped groove connected thereto when the adjusting ring rotates.

[0013] Optionally, a wrench for assisting in rotating the adjusting ring is provided on the outer peripheral surface of the adjusting block.

[0014] Optionally, a plugging hole is provided on the wrench, and a tool for assisting in pulling the wrench is inserted into the plugging hole.

[0015] Optionally, an oil groove for containing lubricating oil is provided on the inner peripheral surface of the shaft hole, and the oil groove extends along the axial direction of the shaft sleeve.

[0016] In the damping device according to an embodiment of the present invention, the adjusting ring is sleeved on the shaft sleeve. The inner wall surface of the adjusting ring contacts the inclined surface of the adjusting block. By moving the adjusting ring up and down and contacting different parts of the inclined surface, the shaft sleeve will contract, adjusting the inner diameter size of the shaft sleeve, thereby adjusting the damping force between the shaft sleeve and the main shaft, so as to make up for the loss of the interference amount between the main shaft and the shaft sleeve during use, and making the damping force between the main shaft and the shaft sleeve stable within the required range. Compared with the prior art, the stability of the damping force of the damping device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a damping device provided by an embodiment of the present invention;

[0018] Figure 2 For Figure 1 Schematic structural view of the central bushing;

[0019] Figure 3 For Figure 1 Schematic structural view of the adjusting ring;

[0020] Figure 4 Schematic assembly view of the bushing and the adjusting ring.

[0021] The reference numerals in the specification are as follows: 1, main shaft; 2, bushing; 3, adjusting ring; 4, shaft hole; 5, first end; 6, second end; 7, adjusting block; 8, inclined surface; 9, driving block; 10, first driving block; 11, second driving block; 12, slope surface; 13, arc-shaped protrusion; 14, adjusting groove; 15, spiral mating surface; 16, first spiral mating surface; 17, second spiral mating surface; 18, first stop step; 19, second stop step; 20, arc-shaped groove; 21, wrench; 22, insertion hole; 23, oil groove; 24, adjusting hole. Detailed implementation manners

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] As Figures 1 to 4 shown, an embodiment of the present utility model provides a damping device, including a main shaft 1, a bushing 2 and an adjusting ring 3. The bushing 2 has a shaft hole 4. The main shaft 1 is press-fitted in the shaft hole 4 of the bushing 2. The bushing 2 is of a flexible structure. The shaft hole 4 includes a first end 5 and a second end 6. An adjusting block 7 is provided on the outer peripheral surface of the bushing 2. The adjusting block 7 extends along the axial direction of the bushing 2. The side of the adjusting block 7 facing away from the main shaft 1 is an inclined surface 8. The inclined surface 8 is inclined from the first end 5 to the second end 6. The adjusting ring 3 is provided with an adjusting hole 24. The adjusting ring 3 is sleeved on the bushing 2. The inner wall surface of the adjusting hole 24 is in contact with the inclined surface 8.

[0024] Specifically, the inclined surface 8 inclines from the first end 5 towards the second end 6, that is, the thickness of the adjusting block 7 gradually increases from the first section towards the second end 6. The adjusting ring 3 is sleeved on the sleeve 2, and the inner wall surface of the adjusting ring 3 contacts the inclined surface 8 of the adjusting block 7. By moving the adjusting ring 3 up and down, when the adjusting ring 3 contacts different parts of the inclined surface 8, the sleeve 2 will contract, adjusting the inner diameter size of the sleeve 2, thereby adjusting the damping force between the sleeve 2 and the main shaft 1, so as to make up for the loss of the interference fit between the main shaft 1 and the sleeve 2 during use, making the damping force between the main shaft 1 and the sleeve 2 stable within the required range, and improving the stability of the damping force of the damping device.

[0025] In one embodiment, an adjusting groove 14 is provided on the hole edge of the first end 5.

[0026] Specifically, an adjusting groove 14 is provided on the hole edge of the first end 5, and the opening of the adjusting groove 14 faces away from the second end 6. This adjusting groove 14 can prevent the sleeve 2 from breaking when the sleeve 2 expands due to heat or contracts due to cold, and improves the stability of the sleeve 2.

[0027] In one embodiment, a plurality of adjusting blocks 7 are provided, and the plurality of adjusting blocks 7 are evenly spaced on the outer peripheral surface of the sleeve 2.

[0028] Specifically, the plurality of adjusting blocks 7 are evenly spaced along the circumferential direction of the sleeve 2, so that the stress generated on the sleeve 2 when the adjusting ring 3 moves up and down is relatively balanced. Furthermore, the damping force between the sleeve 2 and the main shaft 1 is relatively balanced, avoiding stress concentration, and making the damping force between the main shaft 1 and the sleeve 2 relatively stable.

[0029] In one embodiment, the damping device further includes a driving mechanism, the sleeve 2 is connected to the driving mechanism, and the driving mechanism can drive the adjusting ring 3 to move towards or away from the first end 5.

[0030] Specifically, the driving mechanism can drive the adjusting ring 3 to move up and down, changing the position of the adjusting ring 3 on the sleeve 2, with simple operation and convenient control.

[0031] In one embodiment, the driving mechanism includes a driving block 9, the driving block 9 is connected to the outer peripheral surface of the adjusting ring 3, the surface of the driving block 9 facing the first end 5 is a driving surface, the driving surface is a slope surface 12, a spiral mating surface 15 is provided at the hole opening of the adjusting hole 24 away from the first end 5, the slope surface 12 contacts the spiral mating surface 15, and the spiral mating surface 15 is tangent to the slope surface 12.

[0032] Specifically, a spiral mating surface 15 is provided at the orifice of the adjusting ring 3 away from the first end 5, that is, a spiral mating surface 15 is provided at the lower orifice of the adjusting ring 3. The upper side surface of the driving block 9 is a slope surface 12, and the inclination direction of the slope surface 12 is the same as that of the spiral mating surface 15. Since the spiral mating surface 15 is an arc surface, the slope surface 12 is tangent to the spiral mating surface 15. When the adjusting ring 3 is rotated, different parts of the slope surface 12 of the driving block 9 come into contact with the spiral mating surface 15, thereby forcing the adjusting ring 3 to move up and down to change the position of the adjusting ring 3 on the sleeve 2. In addition, the driving block 9 can also block the adjusting ring 3.

[0033] In an embodiment, there are two driving blocks 9, and the two driving blocks 9 are respectively a first driving block 10 and a second driving block 11. The first driving block 10 and the second driving block 11 are arranged at intervals. The spiral mating surface 15 has two sections, and the two sections of the spiral mating surface 15 are respectively a first spiral mating surface 16 and a second spiral mating surface 17. The helix directions of the first spiral mating surface 16 and the second spiral mating surface 17 are the same, and the first spiral mating surface 16 and the second spiral mating surface 17 are connected end to end. A first stop step 18 is provided between the head end of the first spiral mating surface 16 and the tail end of the second spiral mating surface 17, and a second stop step 19 is provided between the tail end of the first spiral mating surface 16 and the head end of the second spiral mating surface 17. The first stop step 18 is in stop cooperation with the first driving block 10, and the second stop step 19 is in stop cooperation with the second driving block 11.

[0034] Specifically, the first driving block 10 and the second driving block 11 are arranged at intervals on the outer peripheral surface of the sleeve 2. The first stop step 18 is in stop cooperation with the first driving block 10, and the second stop step 19 is in stop cooperation with the second driving block 11 to limit the extreme rotation angle of the adjusting block 7.

[0035] In an embodiment, an arc-shaped protrusion 13 is provided on the slope surface 12, and a plurality of arc-shaped grooves 20 are provided on the spiral mating surface 15. Adjacent two arc-shaped grooves 20 are connected. The arc-shaped protrusion 13 can slide from one arc-shaped groove 20 into another arc-shaped groove 20 connected thereto when the adjusting ring 3 rotates.

[0036] Specifically, a plurality of arc-shaped grooves 20 are arranged on the spiral mating surface 15, and adjacent two arc-shaped grooves 20 are connected. When the adjusting ring 3 is rotated, the arc-shaped protrusion 13 can slide from one arc-shaped groove 20 into another arc-shaped groove 20 connected thereto, which can not only limit the adjusting ring 3 at the required angle, but also improve the feel when the adjusting ring 3 rotates.

[0037] In one embodiment, a wrench 21 for assisting the rotation of the adjusting ring 3 is provided on the outer circumferential surface of the adjusting block 7. The provision of the wrench facilitates the assisting rotation of the adjusting ring 3 and is easy to operate.

[0038] In one embodiment, the wrench 21 is provided with an insertion hole 22 for inserting a tool for assisting in turning the wrench 21. The insertion hole 22 can be inserted with a small tool, so that the adjustment ring 3 can be rotated in a narrow space, thereby adjusting the damping force between the sleeve 2 and the main shaft 1.

[0039] In one embodiment, an oil groove 23 for containing lubricating oil is provided on the inner circumferential surface of the shaft hole 4, and the oil groove 23 extends along the axial direction of the shaft sleeve 2. The oil groove 23 contains lubricating oil, which can effectively prevent the main shaft 1 and the inner wall of the shaft sleeve 2 from rubbing and causing chips, thereby affecting the normal operation of the entire device.

[0040] The damping device of the embodiment of the utility model works as follows:

[0041] When the adjusting ring 3 is rotated, the slope surface 12 of the driving block 9 contacts different parts of the spiral mating surface 15, thereby forcing the adjusting ring 3 to move up and down to change the position of the adjusting ring 3 on the sleeve 2, so that the adjusting ring 3 contacts different parts of the inclined surface 8, which will cause the sleeve 2 to contract, adjust the inner diameter of the sleeve 2, adjust the tension of the sleeve 2, and thus adjust the damping force between the sleeve 2 and the main shaft 1.

[0042] According to the damping device provided by the utility model, the adjusting ring 3 is sleeved on the shaft sleeve 2, and the inner wall surface of the adjusting ring 3 contacts the inclined surface 8 of the adjusting block 7. When the adjusting ring 3 is moved up and down, the adjusting ring 3 contacts different parts of the inclined surface 8, which will cause the shaft sleeve 2 to shrink and adjust the inner diameter of the shaft sleeve 2, thereby adjusting the damping force between the shaft sleeve 2 and the main shaft 1 to compensate for the loss of the interference fit between the main shaft 1 and the shaft sleeve 2 during use, so that the damping force between the main shaft 1 and the shaft sleeve 2 is stabilized within the required range, thereby improving the stability of the damping force of the damping device.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A damping device, characterized in that, It includes a main shaft (1), a bushing (2) and an adjusting ring (3). The bushing (2) has a shaft hole (4), and the main shaft (1) is press-fitted in the shaft hole (4) of the bushing (2). The bushing (2) is of a flexible structure. The shaft hole (4) includes a first end (5) and a second end (6). An adjusting block (7) is provided on the outer peripheral surface of the bushing (2). The adjusting block (7) extends along the axial direction of the bushing (2). One side of the adjusting block (7) facing away from the main shaft (1) is an inclined surface (8). The inclined surface (8) is inclined from the first end (5) to the second end (6). The adjusting ring (3) is provided with an adjusting hole (24). The adjusting ring (3) is sleeved on the bushing (2), and the inner wall surface of the adjusting hole (24) contacts the inclined surface (8).

2. The damping device according to claim 1, characterized in that, An adjusting groove (14) is provided on the hole edge of the first end (5).

3. The damping device according to claim 2, wherein, A plurality of the adjusting blocks (7) are provided, and the plurality of adjusting blocks (7) are evenly distributed at intervals on the outer peripheral surface of the bushing (2).

4. The damping device according to claim 3, characterized in that, It further includes a driving mechanism. The bushing (2) is connected to the driving mechanism, and the driving mechanism can drive the adjusting ring (3) to move in a direction close to or away from the first end (5).

5. The damping device according to claim 4, characterized in that, The driving mechanism includes a driving block (9). The driving block (9) is connected to the outer peripheral surface of the adjusting ring (3). One side surface of the driving block (9) facing the first end (5) is a driving surface, and the driving surface is a slope surface (12). A spiral mating surface (15) is provided at the hole opening of the adjusting hole (24) away from the first end (5). The slope surface (12) contacts the spiral mating surface (15), and the spiral mating surface (15) is tangent to the slope surface (12).

6. The damping device according to claim 5, wherein, Two driving blocks (9) are provided. The two driving blocks (9) are respectively a first driving block (10) and a second driving block (11). The first driving block (10) and the second driving block (11) are arranged at intervals. The spiral mating surface (15) has two sections, and the two sections of the spiral mating surface (15) are respectively a first spiral mating surface (16) and a second spiral mating surface (17). The first spiral mating surface (16) and the second spiral mating surface (17) have the same helix direction. The first spiral mating surface (16) and the second spiral mating surface (17) are connected end to end. A first stop step (18) is provided between the head end of the first spiral mating surface (16) and the tail end of the second spiral mating surface (17). A second stop step (19) is provided between the tail end of the first spiral mating surface (16) and the head end of the second spiral mating surface (17). The first stop step (18) is in stop cooperation with the first driving block (10), and the second stop step (19) is in stop cooperation with the second driving block (11).

7. The damping device according to claim 5, characterized in that, The slope surface (12) is provided with an arc-shaped protrusion (13), and the spiral matching surface (15) is provided with a plurality of arc-shaped grooves (20), and two adjacent arc-shaped grooves (20) are connected to each other. When the adjustment ring (3) rotates, the arc-shaped protrusion (13) can slide from one of the arc-shaped grooves (20) into another arc-shaped groove (20) connected thereto.

8. The damping device according to claim 5, characterized in that, A wrench (21) for assisting the rotation of the adjusting ring (3) is provided on the outer peripheral surface of the adjusting block (7).

9. The damping device according to claim 8, characterized in that, The wrench (21) is provided with an inserting hole (22), and the inserting hole (22) is used for inserting a tool for assisting in turning the wrench (21).

10. The damping device according to claim 9, characterized in that, An oil groove (23) for containing lubricating oil is provided on the inner circumferential surface of the shaft hole (4), and the oil groove (23) extends along the axial direction of the shaft sleeve (2).

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