Convenient and fast replacement structure for tension spring of overrunning clutch

Abstract

The utility model discloses an overrun clutch tension spring convenient replacement structure, which comprises an overrun clutch, the overrun clutch comprises a shaft sleeve and a coupling, and a tension spring assembly is arranged between the shaft sleeve and the coupling, and is characterized in that the shaft sleeve comprises a shaft sleeve flange, a groove is arranged at the top of the shaft sleeve flange, and a fixed block is inserted in the groove; the coupling comprises a sleeve, a separation sleeve is arranged on one side of the sleeve, a tension spring assembly is arranged between a fixing block and the sleeve, a bolt in a third screw hole is removed, so that an elastic tension spring is separated from a shaft sleeve flange, the fixing block is taken out of a groove, and the sleeve is sleeved with the sleeve. When the tool is used, the elastic tension spring arranged on the outer side of the first screw in a sleeving mode can be taken down, the fixing block is removed, a notch is formed in the flange of the shaft sleeve, space is reserved for using the tool, and the elastic tension spring part of the second screw can also be conveniently disassembled.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to a convenient replacement structure for the pull spring of an overrunning clutch. Background Art

[0002] An overrunning clutch is a mechanical device used to interrupt power connection. When it is applied to a press, it can be used to interrupt the torque of the flywheel and achieve the function of clutch. There are various types of overrunning clutches. In some precision presses, an overrunning clutch with a pull spring is usually set. This kind of clutch utilizes the cooperation of a hexagonal cam, rollers and a clutch outer sleeve, and realizes the function of power interruption through the position change of the rollers. The disadvantage of the existing such clutch is that since the pull spring is a vulnerable part, when replacing it, it is necessary to disassemble multiple components such as the flywheel on the crankshaft before the pull spring can be conveniently replaced and installed, which is very time-consuming and laborious. This is because the pull spring is required to be as close to the circumferential line as possible during use and not be obliquely pulled, so the space where the pull spring is located is very narrow, and it is impossible to directly use tools to unscrew the screws and take out the pull spring. Therefore, people have conducted a lot of research on this. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a convenient replacement structure for the pull spring of an overrunning clutch, which can solve the problems in the above-mentioned prior art.

[0004] The utility model is realized by the following technical solutions: A convenient replacement structure for the pull spring of an overrunning clutch of the utility model includes an overrunning clutch, and the overrunning clutch includes a bushing and a coupling. The outer circle of the bushing is movably sleeved with the coupling, and a pull spring assembly is arranged between the bushing and the coupling. It is characterized in that the bushing includes a bushing flange, a groove is arranged at the top of the bushing flange, a fixing block is inserted in the groove, the coupling includes a sleeve, a partition sleeve is arranged on one side of the sleeve, the pull spring assembly is arranged between the fixing block and the sleeve, one end of the pull spring assembly is movably connected with the bushing, and the other end is movably connected with the coupling.

[0005] A further technical solution is that a third screw hole is arranged in the fixing block and the bushing flange.

[0006] A further technical solution is that a bolt is arranged in the third screw hole to threadedly connect and fix the fixing block and the bushing flange.

[0007] A further technical solution is that the pull spring assembly includes an elastic pull spring, and first and second screws are respectively arranged at both ends of the elastic pull spring. The first screw is threadedly connected to the upper end of the bushing flange, and the second screw is threadedly connected to the lower end of the sleeve.

[0008] Further technical solution: The elastic tension spring is connected between the first screw and the second screw along the spring track from the rear side.

[0009] Further technical solution: Rings are provided at both ends of the elastic tension spring, and the first screw and the second screw pass through the rings.

[0010] Further technical solution: A first screw hole is provided in the fixed block, a second screw hole is provided in the sleeve, the first screw is in threaded fit connection with the first screw hole, and the second screw is in threaded fit connection with the second screw hole.

[0011] Further technical solution: The partition sleeve abuts against the sleeve flange and the fixed block, and a vacancy is formed between the sleeve flange and the sleeve after the fixed block is removed.

[0012] The beneficial effects of the present utility model are as follows: First, by providing a groove in the sleeve flange, a fixed block abuts in the groove, and the fixed block is detachably connected and fixed to the sleeve flange by a bolt provided in the third screw hole. When replacing the elastic tension spring, the fixed block can be separated and removed from the sleeve flange first. Since the elastic tension spring has a certain elasticity, a large elastic force, and a small space, after the fixed block is removed and separated from the groove, the screw on the sleeve is rotated to align with the groove notch, which is convenient for personnel to replace and install the elastic tension spring.

[0013] Second, for the overall clutch, by using the overrunning clutch principle, an efficient power interruption function is achieved, which is convenient for personnel to operate and use a precision press. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present utility model is described in detail by the following specific embodiments and accompanying drawings.

[0015] Figure 1 FIG. is a schematic diagram of the overall structure of a convenient replacement structure for the overrunning clutch spring of the present utility model;

[0016] Figure 2 is Figure 1 a partial enlarged structure diagram of the structure in FIG.

[0017] Figure 3 is Figure 2 a schematic diagram in the A-A direction of FIG.

[0018] Figure 4 is Figure 2 a sectional structure diagram in the B-B direction of FIG.

[0019] Figure 5 is Figure 2 a schematic diagram of the structure of the sleeve flange in FIG.

[0020] Figure 6 For Figure 5 Schematic diagram of the right side structure of the central bushing flange;

[0021] In the figure, there are crankshaft 11, bushing flange 12, sleeve 13, second screw hole 14, flywheel bushing 15, retaining ring 16, flywheel 17, hexagonal cam 18, separating sleeve 19, clutch sleeve 21, fixing block 22, first screw hole 23, first screw 24, key block 25, second screw 26, bushing sleeve 27, connecting block 28, elastic tension spring 32, tension spring track 33, convex surface 41, flat surface 42, roller cylinder 43, third screw hole 51, groove 52. Specific embodiments

[0022] As Figures 1-6 shown, the present utility model will be described in detail. For the convenience of narration, the directions described below are defined as follows: the up, down, left, right, front, and back directions described below are consistent with the up, down, left, right, front, and back directions of the projection relationship of itself. Figure 1 itself projection relationship of the up, down, left, right, front, and back directions.

[0023] Embodiment 1, a precision press includes a crankshaft 11, an overrunning clutch is power-connected to the crankshaft 11, a flywheel 17 is connected to the outside of the overrunning clutch, the flywheel 17 rotates through a belt. When the overrunning clutch is in the engaged working state, the flywheel 17 drives the overrunning clutch to rotate so that the crankshaft 11 also rotates. When the overrunning clutch is in the stopped working state, the flywheel 17 rotates on the outer surface of the overrunning clutch. At this time, the overrunning clutch does not drive the crankshaft 11 to rotate. Structures such as a connecting rod and a slider can be connected to the crankshaft 11, and a stamping die can be installed on the slider to realize the stamping function.

[0024] Beneficially, the overrunning clutch is power-connected to the crankshaft 11 through a keyway and a key block 25.

[0025] Beneficially, a flywheel bushing 15 is arranged inside the flywheel 17, and the flywheel bushing 15 is sleeved on the outer surface of the crankshaft 11.

[0026] Beneficially, a retaining ring 16 is arranged at the end of the crankshaft 11.

[0027] Embodiment 2, based on Embodiment 1, further defines an overrunning clutch for a precision press, including a bushing, a coupling, a hexagonal cam 18, rollers and a clutch housing. The outer ring of the bushing is movably sleeved with the coupling. The bushing and the hexagonal cam 18 are sleeved on the outer surface of the crankshaft 11 and are power-connected. The clutch housing is sleeved on the outer surface of the hexagonal cam 18. The rollers are arranged between the clutch housing and the hexagonal cam 18, and the rollers are arranged inside the coupling. The clutch housing is fixedly connected to the flywheel 17. The coupling is sleeved on the outer surfaces of the bushing and the hexagonal cam 18. A tension spring assembly is arranged between the bushing and the coupling. One end of the tension spring assembly is movably connected to the bushing, and the other end is movably connected to the coupling.

[0028] Beneficially, the bushing and the hexagonal cam 18 are power-connected to the crankshaft 11 through a key block 25, and the key block 25 is arranged on the outer surface of the crankshaft 11.

[0029] Beneficially, the bushing includes a bushing flange 12. One side of the bushing flange 12 is provided with a bushing sleeve 27. The bushing flange 12 and the bushing sleeve 27 are sleeved on the outer surface of the crankshaft 11. A first key groove for mating connection with the key block 25 is arranged inside the bushing flange 12 and the bushing sleeve 27. The power connection between the bushing and the crankshaft 11 is realized through the first key groove and the key block 25.

[0030] Beneficially, the coupling includes a sleeve 13. A plurality of connection blocks 28 are arranged on the right side of the sleeve 13. The connection blocks 28 are arranged in a circular array. There is a gap between the connection blocks 28, and the rollers are placed in the gap. The sleeve 13 is rotatably arranged on the outer surface of the bushing sleeve 27.

[0031] Beneficially, an oil injection hole 29 is arranged inside the sleeve 13 of the coupling. A gap is arranged between the sleeve 13 and the bushing sleeve 27, and the gap is communicated with the oil injection hole 29. The oil injection hole 29 needs to be connected with an oil plug during actual installation for sealing.

[0032] Beneficially, the roller includes a roller body 43. The roller body 43 is of a cylindrical structure, and the roller body 43 is arranged in the area between the connection blocks 28.

[0033] Beneficially, the hexagonal cam 18 abuts against one side of the bushing sleeve 27. A second key groove is arranged inside the hexagonal cam 18, and the key block 25 is arranged in the second key groove to power-connect the hexagonal cam 18 with the crankshaft 11.

[0034] Beneficially, six planes 42 are arranged on the outer surface of the connection block 28. A convex surface 41 is arranged between the planes 42, and the roller body 43 is arranged between the plane 42 and the connection block 28.

[0035] Beneficially, the clutch outer sleeve includes a clutch sleeve 21 which is rotatably arranged on the outer surface of the connecting block 28. The clutch sleeve 21 is fixedly connected to the flywheel 17, and the roller cylinder 43 is rotatably arranged inside the clutch sleeve 21.

[0036] Beneficially, a tension spring assembly is connected between the sleeve flange 12 and the sleeve 13.

[0037] Embodiment 3 further defines a convenient replacement structure for the overrunning clutch tension spring on the basis of Embodiment 2. The tension spring assembly includes a tension spring 32. The two ends of the tension spring 32 are respectively provided with a first screw 24 and a second screw 26. The first screw 24 is in threaded engagement with the upper end of the sleeve flange 12, and the second screw 26 is in threaded engagement with the lower end of the sleeve 13. The tension spring 32 is connected between the first screw 24 and the second screw 26 along the spring track 33 from the rear side. Circular rings are arranged at both ends of the tension spring 32, and the first screw 24 and the second screw 26 pass through the circular rings.

[0038] Beneficially, a groove 52 is provided at the top of the sleeve flange 12, and a fixing block 22 is inserted into the groove 52. A partition sleeve 19 is arranged on one side of the sleeve 13, and the partition sleeve 19 abuts against the sleeve flange 12 and the fixing block 22. After the fixing block 22 is removed, a vacancy is formed between the sleeve flange 12 and the sleeve 13, which is convenient for personnel to install the tension spring 32 between the sleeve flange 12 and the sleeve 13.

[0039] Beneficially, a first screw hole 23 is arranged in the fixing block 22, and a second screw hole 14 is arranged in the sleeve 13. The first screw 24 is in threaded engagement with the first screw hole 23, and the second screw 26 is in threaded engagement with the second screw hole 14.

[0040] Beneficially, a third screw hole 51 is arranged in the fixing block 22 and the sleeve flange 12, and the fixing block 22 is detachably connected and fixed to the sleeve flange 12 by arranging a bolt in the third screw hole 51.

[0041] The working principle of this clutch is as follows: When the press is actually working, a swingable pressure lever is arranged on the press. The pressure lever can swing elastically. When a person presses down, the pressure lever disengages from the step on the outer surface of the sleeve 13. The abutting outer surface of the sleeve 13 is in the shape of an involute and has a step. When a person does not press down the pressure lever, the pressure lever elastically resets and abuts and fixes against the step on the outer surface of the sleeve 13.

[0042] In the first case, when the compression rod abuts against the step on the outer surface of the coupling, the sleeve 13 and the connecting block 28 are limited and cannot rotate. At this time, there is no relative movement between the hexagonal cam 18, the connecting block 28, and the sleeve 13. Then, at this time, the roller cylinder 43 can freely move within the area formed between the connecting block 28 and the plane 42. At this time, the flywheel 17 is still driven by the pulley and belt in the external space to rotate. Then, it causes the flywheel 17 and the clutch sleeve 21 to rotate annularly around the outer surface of the connecting block 28. At this time, the power of the flywheel 17 cannot be transmitted to the crankshaft 11.

[0043] In the second case, after the operator presses down the compression rod, the compression rod is disengaged from the outer surface of the second screw 26. Taking the crankshaft 11 as the stationary reference system, after the tension spring elastically returns, since the sleeve flange 12 and the crankshaft 11 are power-connected through the key block 25 and they maintain the same motion state, the same is true for the hexagonal cam 18. Then, after the tension spring elastically returns, it will pull the sleeve 13 and the connecting block 28 to rotate counterclockwise for reset. Then, it will drive the connecting block 28 to rotate relative to the crankshaft 11 and the hexagonal cam 18. When the connecting block 28 pushes the roller cylinder 43 and moves to the side close to the convex surface 41, it is clamped by the plane 42 and the inner diameter surface of the clutch sleeve 21. Then, the hexagonal cam 18, the crankshaft 11, the connecting block 28, the clutch sleeve 21, and the sleeve 13 can be clamped and power-connected. Then, the power of the flywheel 17 is transmitted to the crankshaft 11 through the hexagonal cam 18, the key block 25, the connecting block 28, the clutch sleeve 21, the sleeve 13, and the roller cylinder 43, causing the crankshaft 11 to rotate. After the crankshaft 11 rotates, it can drive the cam on the crankshaft to rotate, realizing the corresponding stamping function.

[0044] Then, after the compression rod abuts against the outer surface of the coupling again, that is, against the step of the sleeve 13, the first case will be reached to interrupt the power.

[0045] When replacing the elastic tension spring 32, stop the equipment. Remove the bolt in the third screw hole 51 to separate the elastic tension spring 32 from the sleeve flange 12. Take out the fixed block 22 from the groove 52, and then the elastic tension spring 32 sleeved outside the first screw 24 can be removed. And the part of the elastic tension spring 32 of the second screw 26 can also be easily removed.

[0046] The above are only specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model; therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A structure for conveniently replacing a tension spring of an overrunning clutch, comprising an overrunning clutch, the overrunning clutch comprising a shaft sleeve and a coupling, the outer ring of the shaft sleeve being movably connected to the coupling, a tension spring assembly being arranged between the shaft sleeve and the coupling, characterized in that: The shaft sleeve comprises a shaft sleeve flange (12), a groove (52) is arranged at the top of the shaft sleeve flange (12), a fixing block (22) is inserted in the groove (52), the coupling comprises a sleeve (13), a separating sleeve (19) is arranged on one side of the sleeve (13), a tension spring assembly is arranged between the fixing block (22) and the sleeve (13), one end of the tension spring assembly is movably connected to the shaft sleeve, and the other end is movably connected to the coupling.

2. The structure for conveniently replacing the tension spring of an overrunning clutch according to claim 1, characterized in that: A third screw hole (51) is provided in the fixing block (22) and the shaft sleeve flange (12).

3. The structure for conveniently replacing the tension spring of an overrunning clutch according to claim 2, characterized in that: A bolt is arranged in the third screw hole (51) to threadably connect and fix the fixing block (22) and the shaft sleeve flange (12).

4. The structure for conveniently replacing the tension spring of an overrunning clutch according to claim 1, characterized in that: The separation sleeve (19) is arranged to abut against the shaft sleeve flange (12) and the fixing block (22); after the fixing block (22) is removed, a gap is formed between the shaft sleeve flange (12) and the sleeve (13).

5. A structure for conveniently replacing a tension spring of an overrunning clutch according to any one of claims 1 to 4, characterized in that: The tension spring assembly comprises an elastic tension spring (32), and a first screw (24) and a second screw (26) are respectively provided at both ends of the elastic tension spring (32), wherein the first screw (24) is threadedly connected to the upper end of the shaft sleeve flange (12), and the second screw (26) is threadedly connected to the lower end of the sleeve (13).

6. The structure for conveniently replacing the tension spring of an overrunning clutch according to claim 5, characterized in that: The elastic tension spring (32) is connected between the first screw (24) and the second screw (26) from the rear side along a tension spring track (33).

7. The structure for conveniently replacing the tension spring of an overrunning clutch according to claim 5, characterized in that: Circular rings are arranged at both ends of the elastic tension spring (32), and the first screw (24) and the second screw (26) pass through the circular rings.

8. The structure for conveniently replacing the tension spring of an overrunning clutch according to claim 5, characterized in that: The fixing block (22) is provided with a first screw hole (23), the sleeve (13) is provided with a second screw hole (14), the first screw (24) is threadedly connected to the first screw hole (23), and the second screw (26) is threadedly connected to the second screw hole (14).

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