Clamping force control mechanism

Abstract

The utility model belongs to the technical field of engineering parts, and particularly relates to a clamping force control mechanism which comprises a tension rotating shaft and a bearing sleeve, the tension rotating shaft is rotatably arranged on the bearing sleeve, and at least one part of the tension rotating shaft is axially exposed out of one end of the bearing sleeve. A clamping nut is arranged on the portion, outside the bearing sleeve, of the tension rotating shaft, a movable clamping gasket is arranged at one end of the bearing sleeve, and the clamping nut abuts against the clamping gasket to axially move towards a clamping cap arranged at the other end of the bearing sleeve. After the nut is screwed down, the bolt which is continuously influenced by tension may deform, and a clamping cap at the rear end of the bearing sleeve and a clamping gasket at the front end of the bearing sleeve are not fixedly connected with the tension rotating shaft and are only subjected to axial tension of the tension rotating shaft, so that clamping components at the two ends can have certain self-adaptive adjustment; and the clamping angle does not change along with the deformed bolt, so that the stable clamping of an object is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of engineering parts technology, specifically relating to a clamping force control mechanism. Background Technology

[0002] Bolt: A mechanical part, a cylindrical threaded fastener fitted with a nut. It consists of a head and a shank (a cylinder with external threads), and is used to fasten two parts with through holes. This type of connection is called a bolted connection. Since the two parts can be separated by unscrewing the nut, a bolted connection is a detachable connection.

[0003] A novel bolt and nut connection assembly disclosed in patent CN206845641U includes a bolt and a nut. One end of the bolt has a hexagonal wrench-type structure and a break-off groove. The nut is threaded onto the bolt body and is a hexagonal flange self-locking nut, with the flange facing the bolt tail. The break-off groove is located between the bolt body and the hexagonal wrench-type structure. In this connection assembly, the break-off groove controls the clamping force generated after installation; the nut's structure controls the locking force generated after installation; and due to the reasonable proportions of the components and their mutual cooperation, it not only ensures a smaller driving force during installation but also guarantees a high degree of stability after installation.

[0004] In the above solution, not only can the operation be carried out in a narrow space, but the clamping force generated after the components are installed can also be controlled. However, there is no limiting mechanism between the bolts and nuts, and the clamping surface of the clamped object cannot always be in contact with the clamped object, resulting in uneven force on the clamping surface, which can easily cause local damage. At the same time, it is impossible to guarantee stable clamping of the object. Utility Model Content

[0005] The purpose of this invention is to provide a clamping force control mechanism that can solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A clamping force control mechanism includes a tension shaft and a bearing sleeve. The tension shaft is rotatably disposed on the bearing sleeve and at least a portion of it is axially exposed from one end of the bearing sleeve. A clamping nut is disposed on the portion of the tension shaft outside the bearing sleeve. A movable clamping washer is disposed at one end of the bearing sleeve. The clamping nut abuts against the clamping washer and moves axially toward a clamping cap disposed at the other end of the bearing sleeve.

[0008] In the clamping force control mechanism, the clamping cap has an axial through hole communicating with the inner cavity of the bearing sleeve, the tension shaft is fitted into the through hole with clearance, and a limiting cap with a diameter larger than the through hole is provided circumferentially to abut against the clamping cap.

[0009] In the clamping force control mechanism, the clamping cap is provided with an annular splicing plate along the inner wall of the through hole, and the splicing plate is detachably inserted into the inner stepped structure opened at the end of the bearing sleeve.

[0010] In the clamping force control mechanism, the clamping cap has a tapered enlarged hole on the side away from the bearing sleeve through the through hole, and the limiting cap is countersunk in the tapered enlarged hole.

[0011] In the clamping force control mechanism, the tension shaft is provided with a wrench joint at one end exposed on the bearing sleeve, and a threaded part is provided between the wrench joint and the bearing sleeve, and the clamping nut is provided on the threaded part.

[0012] In the clamping force control mechanism, a break-off groove is provided circumferentially between the wrench fitting and the threaded part.

[0013] In the clamping force control mechanism, the diameter of the wrench joint is not greater than the smaller diameter of the threaded portion.

[0014] In the clamping force control mechanism, the outer wall of the bearing sleeve near the clamping nut is provided with an outer stepped structure in the circumferential direction, and the clamping washer is slidably sleeved on the outer stepped structure.

[0015] In the clamping force control mechanism, the clamping pad is axially provided with an annular reinforcing pad on one end face of the clamping cap, which slides in the outer stepped structure, and the surface of the reinforcing pad is flush with the outer diameter of the bearing sleeve.

[0016] In the clamping force control mechanism, the clamping washer has a limiting groove on one end face of the clamping nut. The bottom of the limiting groove contacts the abutting surface of the clamping nut, and the abutting top of the clamping nut can be embedded in the limiting groove when it rotates.

[0017] The advantages of this utility model are:

[0018] After the nut is tightened, the bolt, which is continuously subjected to tension, may deform. However, neither the clamping cap at the rear end of the bearing sleeve nor the clamping washer at the front end is fixedly connected to the tension shaft. They are only subjected to the axial tension of the tension shaft. Therefore, the clamping components at both ends can be adjusted to a certain extent and will not change the clamping angle with the deformed bolt, thus ensuring stable clamping of the object. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] In the diagram, the components are: tension shaft 1, limit cap 11, wrench sleeve joint 12, threaded part 13, unscrewing groove 14, bearing sleeve 2, clamping washer 21, clamping cap 22, splicing plate 23, inner stepped structure 24, outer stepped structure 25, reinforcing pad 26, limit groove 27, and clamping nut 3. Detailed Implementation

[0022] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.

[0023] like Figures 1-2 As shown, the clamping force control mechanism includes a tension shaft 1 and a bearing sleeve 2. The tension shaft 1 is rotatably disposed on the bearing sleeve 2 and at least a portion of it is axially exposed from one end of the bearing sleeve 2. A clamping nut 3 is provided on the outer part of the tension shaft 1 and the bearing sleeve 2. A movable clamping washer 21 is provided at one end of the bearing sleeve 2. The clamping nut 3 abuts against the clamping washer 21 and moves axially toward a clamping cap 22 provided at the other end of the bearing sleeve 2.

[0024] That is, the bolt, which is continuously subjected to tension after the nut is tightened, may deform. However, neither the clamping cap at the rear end of the bearing sleeve nor the clamping washer at the front end is fixedly connected to the tension shaft. They are only subjected to the axial tension of the tension shaft. Therefore, the clamping components at both ends can be adjusted to a certain extent and will not change the clamping angle with the deformed bolt, thus ensuring stable clamping of the object.

[0025] In this embodiment, the clamping cap 22 has an axial through hole that communicates with the inner cavity of the bearing sleeve 2. The tension shaft 1 is fitted into the through hole with clearance and is provided with a limiting cap 11 with a diameter larger than the through hole in the circumferential direction, which abuts against the clamping cap 22.

[0026] The tension shaft 1 passes through the clamping cap 22, while the limiting cap 11 is restricted to the outside of the bearing sleeve 2, so that the axial movement of the tension shaft 1 is restricted in one direction. The object is clamped by stretching the tension shaft 1 through the clamping nut 3.

[0027] Among them, the clamping nut 3 can be loosened to pull the tension shaft 1 to the other side, which is also beneficial for the processing, production and transportation of parts.

[0028] In this embodiment, the clamping cap 22 is provided with an annular splicing plate 23 along the inner wall of the through hole. The splicing plate is detachably inserted into the inner stepped structure 24 opened at the end of the bearing sleeve 2.

[0029] The inner wall of the clamping cap is provided with a detachable splicing plate that can be inserted into the bearing sleeve. The inner stepped structure provides further mechanical locking for the clamping cap 22, enhances the clamping cap 22's ability to maintain the clamping angle, and reduces the impact of the deformation of the tension shaft 1.

[0030] In this embodiment, the clamping cap 22 has a tapered enlarged hole on the side away from the bearing sleeve 2, and the limiting cap 11 is countersunk in the tapered enlarged hole.

[0031] The clamping cap is provided with a conical enlarged hole limiting cap countersunk on the side away from the bearing sleeve. The countersunk design reduces the outward protrusion structure and improves space utilization. At the same time, it avoids the clamping cap 22 end from hitting other objects, which would cause the tension shaft 1 to be unable to be freely adjusted.

[0032] In this embodiment, the end of the tension shaft 1 exposed above the bearing sleeve 2 is provided with a wrench joint 12, and a threaded part 13 is provided between the wrench joint 12 and the bearing sleeve 2, and a clamping nut 3 is provided on the threaded part 13.

[0033] The outer end of the tension shaft is equipped with a wrench joint and a threaded part, and the clamping nut is screwed into the threaded part. Setting the two rotational force points on the same side can accommodate the space on both sides of the clamped object, and the force application efficiency is higher at the same side, which is convenient for manual operation.

[0034] In this embodiment, a screw-off groove 14 is provided circumferentially between the wrench fitting 12 and the threaded part 13.

[0035] A break-off groove is provided between the wrench's joint and the threaded part. After installation, the excess part is broken off by applying torque. The groove depth matches the material strength to ensure controllable breakage.

[0036] In this embodiment, the diameter of the wrench fitting 12 is not greater than the small diameter of the threaded portion 13.

[0037] The wrench end 12 is coaxially connected to the threaded part 13. The clamping nut is adapted to the size of the threaded part 13. Therefore, the wrench end 12 needs to be smaller than the threaded part 13 so that the clamping nut can pass through the wrench end 12.

[0038] In this embodiment, the outer wall of the bearing sleeve 2 near the clamping nut 3 is provided with an outer stepped structure 25 in the circumferential direction, and the clamping washer 21 is slidably sleeved on the outer stepped structure 25.

[0039] The outer wall of the bearing sleeve is equipped with an external stepped structure for clamping pads to slide on. The stepped structure limits the axial movement range of the clamping pads, ensuring uniform distribution of clamping force and extending service life.

[0040] In this embodiment, a ring-shaped reinforcing pad 26 is axially provided on one end face of the clamping pad 21 corresponding to the clamping cap 22, and slides in the outer stepped structure 25. The surface of the reinforcing pad 26 is flush with the outer diameter of the bearing sleeve 2.

[0041] The end face of the clamping gasket is provided with an annular reinforcing plate that is flush with the outer wall of the bearing sleeve. The reinforcing plate 26 increases the contact area between the gasket and the bearing sleeve 2, improving the stability of the axial movement of the gasket. At the same time, the clamped object abuts against the reinforcing plate 26, making up for the lack of support in the outer stepped structure 25, so that the clamped object can remain stable.

[0042] In this embodiment, the clamping washer 21 has a limiting groove 27 on one end face of the clamping nut 3. The bottom of the limiting groove 27 contacts the abutting surface of the clamping nut 3, and the abutting top of the clamping nut 3 can be embedded in the limiting groove 27 when it rotates.

[0043] A limiting groove is provided on the end face of the clamping washer, and the clamping nut is embedded in the top of the clamping nut. The groove matches the shape of the top of the bolt after rotation, which can limit the radial displacement of the bolt.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A clamping force control mechanism comprising a tensioning swivel (1) and a carrier sleeve (2), characterized in that The tension rotating shaft (1) is rotatably arranged in the bearing sleeve (2) and at least partially exposed from one end of the bearing sleeve (2) in the axial direction, and a clamping nut (3) is arranged on the part of the tension rotating shaft (1) outside the bearing sleeve (2), one end of the bearing sleeve (2) is provided with a movable clamping washer (21), and the clamping nut (3) abuts against the clamping washer (21) and moves in the axial direction to a clamping cap (22) arranged at the other end of the bearing sleeve (2).

2. The clamp force control mechanism of claim 1, wherein, The clamping cap (22) is axially provided with a through hole communicated with the inner cavity of the bearing sleeve (2), the tension rotating shaft (1) is clearance-fitted in the through hole and circumferentially provided with a limiting cap (11) with a diameter larger than the through hole and abutting against the clamping cap (22).

3. The clamp force control mechanism of claim 2, wherein, The clamping cap (22) is axially provided with an annular splicing plate (23) along the inner wall of the through hole, and the splicing plate is detachably inserted into an inner stepped structure (24) arranged at the end of the bearing sleeve (2).

4. The clamp force control mechanism of claim 2, wherein, The clamping cap (22) is axially provided with a tapered counterbore at the side away from the bearing sleeve (2), and the limiting cap (11) is counterbore-fitted in the tapered counterbore.

5. The clamp force control mechanism of claim 1, wherein, The tension rotating shaft (1) exposed from one end of the bearing sleeve (2) is provided with a wrench socket (12), a threaded portion (13) is arranged between the wrench socket (12) and the bearing sleeve (2), and the clamping nut (3) is arranged on the threaded portion (13).

6. The clamp force control mechanism of claim 5, wherein, A breaking groove (14) is circumferentially arranged between the wrench socket (12) and the threaded portion (13).

7. The clamp force control mechanism of claim 5, wherein, The diameter of the wrench socket (12) is not greater than the small diameter of the threaded portion (13).

8. The clamp force control mechanism of claim 1, wherein, An outer stepped structure (25) is circumferentially arranged on the outer wall of the bearing sleeve (2) close to one end of the clamping nut (3), and the clamping washer (21) is slidingly arranged on the outer stepped structure (25).

9. The clamp force control mechanism of claim 8, wherein, An annular reinforcing washer (26) is axially arranged on the outer stepped structure (25) corresponding to one end surface of the clamping cap (22), and the surface of the reinforcing washer (26) is flush with the outer diameter of the bearing sleeve (2).

10. The clamp force control mechanism of claim 8, wherein, A limiting recess (27) is arranged on one end surface of the clamping washer (21) corresponding to the clamping nut (3), the bottom of the limiting recess (27) is in contact with the abutting surface of the clamping nut (3), and the abutting part of the clamping nut (3) rotating in the axial direction can be embedded in the limiting recess (27).

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