Detachable torque device
By designing a detachable torque device, the problems of wear and waste caused by non-detachable devices are solved, enabling the maintenance and replacement of components and improving the reliability and service life of the device.
Patent Information
- Application Number
- CN202423027448.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The existing adjustable torque device is not detachable, which leads to the inability to accurately control the torque after the internal components wear out, and it cannot be repaired or replaced, resulting in waste.
Design a detachable torque device, including a sleeve, a main shaft, a limiting assembly, a compression spring, a driven component, and a driving component. The main shaft is detachably connected through the cooperation of the limiting assembly, allowing for the disassembly and replacement of internal components.
This enables the repair and replacement of components of the detachable torque device, avoiding the waste caused by replacing the entire device and improving the reliability and service life of the device.
Smart Images
Figure CN223493164U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical assembly technology, and in particular to a detachable torque device. Background Technology
[0002] In many industries, such as sports equipment and medical devices, there are extremely stringent requirements for product safety and quality standards. Adjustable torque devices better meet these high safety and quality standards. By precisely controlling the torque, it is possible to ensure that critical components are securely connected and will not be damaged by overtightening, thereby improving the overall reliability and safety of the product.
[0003] However, existing adjustable torque devices are sealed and non-removable, which makes it easy for the internal components to wear out over time, leading to problems such as inaccurate torque control and inability to repair or replace the internal components.
[0004] Therefore, the aforementioned technical problems need to be solved. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art, this utility model proposes a detachable torque device, the purpose of which is to realize the detachability of the adjustable torque device, so that the internal components of the adjustable torque can be repaired and replaced.
[0006] To solve the above-mentioned technical problems, the basic technical solution proposed by this utility model is as follows:
[0007] A detachable torque device includes a sleeve having a hollow portion, the hollow portion having a main shaft arranged axially; the upper part of the main shaft cooperates with a first limiting component assembled at the sleeve, the first limiting component constraining the main shaft to move downward; a compression spring, a driven member, and a driving member that are driven by the driven member are arranged from top to bottom in the hollow portion of the sleeve, the compression spring, the driven member, and the driving member being sleeved from top to bottom on the outer periphery of the main shaft;
[0008] The active component has a second receiving cavity that is open at the lower end and is arranged around the main shaft. The lower end of the main shaft is detachably connected to a second limiting component. The lower end of the compression spring abuts against the driven component and applies a downward elastic force to the driven component, so that the second limiting component is located in the second receiving cavity and abuts against the active component to constrain the active component from completely disengaging downward from the sleeve. When the active component is subjected to an upward force and compresses the compression spring, the active component moves upward along the axial direction, so that the second limiting component disengages from the active component and is exposed outside the second receiving cavity.
[0009] Furthermore, the second limiting component includes a second retaining ring, which is detachably engaged in a groove located on the outer periphery of the spindle, and the second retaining ring abuts against the driving member.
[0010] Furthermore, the second receiving cavity is fitted inside and onto an inner wall of the active member that forms the receiving cavity, the upper end face of the second thrust bearing abuts against the top wall of the second receiving cavity, and its lower end face abuts against the second retaining spring.
[0011] Furthermore, the active component has a limiting portion arranged radially outward, which is located below the lower end face of the sleeve and maintains a preset distance from the lower end face of the sleeve.
[0012] Furthermore, the limiting part has a radially arranged mounting through hole that connects to the outside and the receiving cavity, and the mounting through hole is located below the main shaft.
[0013] Furthermore, the first limiting component includes a top cover;
[0014] The top cover has a first receiving cavity;
[0015] The upper end of the main shaft is located in the first receiving cavity and abuts against the inner wall of the first receiving cavity.
[0016] Furthermore, the top cover has a first limiting portion;
[0017] The lower surface of the first limiting part abuts against the upper end surface of the sleeve.
[0018] Furthermore, the first limiting component also includes a sealing plug;
[0019] The sealing plug is located outside the main shaft and inside the first receiving cavity, and is sleeved with the inner wall of the first receiving cavity. The upper end face of the sealing plug abuts against the main shaft, and its lower end face abuts against the bottom wall of the first receiving cavity.
[0020] Furthermore, it also includes the first thrust bearing;
[0021] The first thrust bearing is located outside the main shaft and between the main shaft and the first limiting assembly.
[0022] Furthermore, a first spring is connected below the first thrust bearing;
[0023] The first spring is located on the outside of the main shaft and the lower end of the first spring is connected to a first retaining ring, which is located on the outside of the main shaft.
[0024] The beneficial effects of this utility model are:
[0025] The present invention provides a detachable torque device, comprising a sleeve having a hollow portion, the hollow portion having an axially arranged main shaft; a first limiting component is detachably connected to the upper part of the main shaft, the first limiting component being used to constrain the downward movement of the main shaft, and a second limiting component is detachably connected to the lower end of the main shaft; within the hollow portion of the sleeve, the first limiting component, a compression spring, a driven member, an active member, and the second limiting component are arranged sequentially from top to bottom and are all sleeved on the outer periphery of the main shaft; when the active member is subjected to an upward force, the active member compresses the compression spring, thereby enabling the active member to move upward along the axial direction, thereby causing the second limiting component to detach from the active member and protrude outside the second receiving cavity, thus allowing the second limiting component to be detached from the lower end of the main shaft to remove the active member from the sleeve, and subsequently allowing the other components of the detachable torque device to be disassembled in sequence to enable the repair or replacement of components requiring maintenance. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the external structure of the detachable torque device according to Embodiment 1 of this utility model;
[0027] Figure 2 This is a schematic diagram of the sleeve structure according to Embodiment 1 of this utility model;
[0028] Figure 3 This is a schematic diagram of the internal structure of the detachable torque device according to Embodiment 1 of this utility model.
[0029] Figure 4 This is a schematic diagram of the second limiting component structure according to Embodiment 1 of this utility model;
[0030] Figure 5 This is a schematic diagram of the structure of the active component abutting against the sleeve in Embodiment 1 of this utility model;
[0031] Figure 6 This is a schematic diagram of the structure of the first limiting component in Embodiment 1 of this utility model;
[0032] Explanation of reference numerals in the attached figures:
[0033] 1-Sleeve, 11-Hollow section, 12-Upper end face, 13-Lower end face, 2-Main shaft, 21-Slot, 3-First limiting component, 31-Top cover, 311-First receiving cavity, 3111-Inner wall, 3112-Bottom wall, 312-First limiting part, 3121-Lower surface, 32-Sealing plug, 321-Upper end face, 322-Lower end face, 33-First thrust bearing, 4-Compression spring, 5- Driven component, 6-Driving component, 61-Second receiving cavity, 612-Top wall, 62-Limiting part, 621-Assembly through hole, 7-Second limiting assembly, 71-Second retaining ring, 72-Second thrust bearing, 721-Upper end face of thrust bearing, 722-Lower end face of thrust bearing, 8-First spring, 9-First retaining ring, A-Outer shell, B-Middle part, C-Notch, D-Moving component, Keyway groove-E, Pin-F. Detailed Implementation
[0034] The following will be combined with the appendix Figure 1 To be continued Figure 6 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0035] Adjustable torque devices are widely used in various fields in daily life, such as the connection of transmission rods in fitness equipment, and the distance between different transmission rods. However, with the cumulative use of adjustable torque devices, the internal components are prone to aging and wear, resulting in inaccurate torque adjustment. However, existing adjustable torque devices are usually integrally sealed structures that cannot be disassembled. Therefore, when the torque adjustment of the adjustable torque device is inaccurate, the entire adjustable torque device can only be replaced, resulting in waste.
[0036] In response to this, the inventor provides a detachable torque device, which aims to solve the problem that existing adjustable torque devices are not detachable, and when internal components age or wear, causing inaccurate torque adjustment, the entire adjustable torque device must be replaced, resulting in waste.
[0037] Detailed, such as Figures 1 to 3As shown, a detachable torque device according to this technical solution includes a sleeve 1, which has an upper shell and a lower shell. The upper shell and the lower shell each have a keyway E. The upper shell and the lower shell are integrally connected by an intermediate part B. The connection between the upper shell and the lower shell and the intermediate part B has a shoulder. In some applications, an outer shell A is installed at the shoulder. The outer shell A is used to prevent external dust from entering the sleeve 1. The sleeve 1 has a hollow part 11, and the hollow part 11 is provided with a main shaft 2 arranged axially. The upper end of the main shaft 2 has a mounting hole, which includes a cross, a circle, a quadrilateral, or a hexagon, etc., for connecting with an external device (such as a screwdriver, a hexagonal key knife, etc.), so that when the external device acts on the main shaft 2, the main shaft 2 can rotate inside the sleeve 1 to adjust the torque. The main shaft 2 is axially fitted from top to bottom with a first limiting component 3, a moving part D, a compression spring 4, a driven part 5, a driving part 6, and a second limiting component 7. It should be noted that the moving part D and the driven part 5 are respectively limited in the keyway E of the upper shell and the lower shell by the pin F, so that the two parts can only move axially in a straight line along the main shaft 2.
[0038] like Figure 3 As shown, the upper part of the spindle 2 cooperates with a first limiting assembly 3 assembled at the sleeve 1. The first limiting assembly 3 includes a top cover 31, a first receiving cavity 311, a first thrust bearing 33, a first spring 8, a first retaining ring, and a washer. The first limiting assembly 3 restricts the spindle 2 to move downward. Inside the hollow part 11 of the sleeve 1, a moving part D, a compression spring 4, a driven part 5, and a driving part 6 that drives the driven part 5 are arranged from top to bottom. The compression spring 4, the driven part 5, and the driving part 6 are sleeved on the outer periphery of the spindle 2 from top to bottom.
[0039] Among them, such as Figure 3 and Figure 4 As shown, the active member 6 has a notch C for clamping an external device, such as a wrench. By clamping the notch C with a wrench, the active member 6 is driven to rotate around the main shaft 2. The active member 6 also has a second receiving cavity 61 that is arranged around the main shaft 2 and open at the lower end. The lower end of the main shaft 2 is detachably connected to a second limiting component 7.
[0040] It should be noted that the first spring 8 applies equal forces to the first thrust bearing 33 and the retaining ring 9, so that the main shaft 2 is constrained in the sleeve 1 by the first limiting component 3 at the top and the first spring 8. Without applying longitudinal force, the main shaft 2 cannot make longitudinal or vertical displacement relative to the sleeve 1.
[0041] Specifically, the upper part of the main shaft 2 is abutted against the inside of the top cover 31, preventing the upper part of the main shaft 2 from moving axially downward. Furthermore, due to the constraint of the first spring 8 and the first retaining ring 9, the main shaft 2 cannot move axially upward. How the first spring 8 and the first retaining ring 9 prevent the main shaft 2 from moving axially upward is explained below.
[0042] Furthermore, the second limiting component 2 includes a second receiving cavity 61, a second retaining ring 71, and a second thrust bearing 72. The second retaining ring 71 and the second thrust bearing 72 cooperate to constrain the lower part of the main shaft 2 within the second receiving cavity 61. Therefore, through the cooperation of the first limiting component 3 and the second limiting component 2, the upper and lower parts of the main shaft 2 are respectively constrained to the upper and lower ends of the sleeve 1.
[0043] Specifically, such as Figure 4 As shown, the lower end of the compression spring 4 abuts against the driven member 5 and applies a downward elastic force to the driven member 5, so that the second limiting component 7 is located in the second receiving cavity 61 and abuts against the inner wall of the driving member 6 to constrain the driving member 6 from completely disengaging downward from the sleeve 1.
[0044] However, when it is necessary to disassemble the detachable torque device.
[0045] First, with the upper end of the main shaft 2 placed against a wall or solid object, then as follows: Figure 5 As shown, when the active member 6 is subjected to an upward force (in the direction indicated by the arrow), the active member 6 compresses the compression spring 4. The active member 6 moves upward along the axial direction, causing the second limiting component 7 to disengage from the active member 6 and protrude outside the second receiving cavity 61. This facilitates the removal of the second retaining ring 71 from the main shaft 2 using a retaining ring removal tool. This allows the subsequent components, such as the second thrust bearing 72 and the active member 6, to be sequentially removed downward from the main shaft 2, thus achieving the disassembly of the detachable torque device. Of course, the removal is not limited to using retaining ring pliers; other auxiliary tools can also be used.
[0046] When the second limiting component 7 is removed, the driving member 6 is able to disengage from the sleeve 1 because it is no longer constrained by the second limiting component 7. With the removal of the driving member 6, the pin F is pulled out of the keyway E, and the driven member 5, the compression spring 4, the spindle 2, and the first limiting component 3 are then removed.
[0047] In this embodiment, as Figure 4 and Figure 5As shown, the second limiting component 7 includes a second retaining spring 71, which is detachably snapped into a retaining groove 21 located on the outer periphery of the main shaft 2, and the second retaining spring 71 abuts against the driving member 6.
[0048] It can be understood that the assembly friction between the second retaining spring 71 and the retaining groove 21, as well as the abutting force between the second retaining spring 71 and the driving member 6, constrains the driving member 6 below the sleeve 1. Therefore, when the second retaining spring 71 is removed from the retaining groove 21, the second thrust bearing 72 and the driving member 6 lose their constraining abutting force, and can then be removed from the sleeve 1.
[0049] Furthermore, the second limiting component 7 also includes a second thrust bearing 72, which is sleeved on the outside of the main shaft 2 and located inside the second receiving cavity 61 and is sleeved with an inner wall 63 of the active member 6 that forms the second receiving cavity 61. The upper end face 721 of the second thrust bearing 72 abuts against the top wall 612 of the second receiving cavity 61, and the lower end face 722 of the thrust bearing abuts against the second retaining spring 71.
[0050] The second thrust bearing 72 is used to reduce the friction between the main shaft 2 and the inner wall of the second receiving cavity 61 when the external device rotates the main shaft 2, thereby preventing wear on the main shaft 2. More importantly, when the driving member 6 rotates, the second thrust bearing 72 is used to convert the rotational force of the driving member 6 into the rotational force of the second thrust bearing 72, preventing the driving member 6 from driving the main shaft 2 to rotate along with it. At the same time, it can also prevent the main shaft 2 from rotating along with the driving member 6 when the driving member 6 rotates along the main shaft 2.
[0051] The second thrust bearing 72 is disposed between the second retaining ring 71 and the top wall 612 of the second receiving cavity 61, and abuts against the upper end face of the second retaining ring 71 and the lower end face of the top wall 612, so that the driving member 6 is abutted and constrained by the second thrust bearing 72 below the sleeve 1, and the driving member 6 cannot move axially downward in the sleeve 1.
[0052] In addition, the second limiting component 7 can also be used to prevent the active member 6 from moving downward relative to the sleeve 1 in the axial direction, so that the active member 6 is prevented from falling out of the sleeve 1 when rotating.
[0053] Furthermore, in order to facilitate the removal of the active member 6 from the sleeve 1, the active member 6 has a limiting part 62 arranged radially outward, which is located below the lower end face 13 of the sleeve 1 and maintains a preset distance from the lower end face 13 of the sleeve 1.
[0054] In another embodiment, as shown Figure 4 and Figure 5 As shown, the preset distance is used to allow the active member 6 to move along the preset distance when it is subjected to an upward moving force. When the limiting part 62 moves to contact the lower end face 13 of the sleeve 1, the second retaining spring 71 in the second limiting assembly 7 is completely exposed outside the second receiving cavity 61, so that the user can remove the second retaining spring 71 from the main shaft 2 to disassemble the detachable torque device.
[0055] Furthermore, the limiting part 62 has a radially arranged mounting through hole 621, which connects to the outside and the second receiving cavity 61. The mounting through hole 621 is located below the main shaft 2. The mounting through hole 621 allows the second retaining spring 71 to be exposed from the second receiving cavity 61 so that the user can remove the second retaining spring 71. In addition, it also allows an external device to be inserted to connect to the driving member 6 to realize the rotation operation of the driving member 6.
[0056] In addition, the outer side of the limiting part 62 has a screw hole located on the side of the C notch. The screw hole extends from the side into the mounting through hole 621. When an external device (such as a connecting rod) is inserted into the mounting through hole 621, a bolt can be inserted through the screw hole to fix the external device.
[0057] In addition, the first limiting component 3 is provided above the sleeve 1. The first limiting component 3 is used to prevent the spindle 2 from moving upward and downward relative to the sleeve 1.
[0058] Detailed as Figure 6 As shown, the first limiting component 3 includes a top cover 31; the top cover 31 has a first receiving cavity 311; the upper end of the main shaft 2 is disposed in the first receiving cavity 311 and abuts against the inner wall 3111 and the bottom surface of the first receiving cavity 311, so that the main shaft 2 cannot move axially downward, thereby constraining the upper part of the main shaft 2 in the first receiving cavity 311.
[0059] In order for the spindle 2 to be better constrained above the sleeve 1, the top cover 31 has a first limiting part 312; the lower surface 3121 of the first limiting part 312 abuts against the upper end surface 12 of the sleeve 1.
[0060] It should be understood that the frictional force between the lower surface 3121 and the upper end surface 12 causes the top cover 31 to be fixedly mounted above the sleeve 1. When the top cover 31 is fixed, the main shaft 2, which is abutted against the inner wall 3111 of the first receiving cavity 311, is even less able to move axially downward.
[0061] Furthermore, the first limiting component 3 also includes a sealing plug 32; the sealing plug 32 is usually made of elastic materials such as plastic pads, the sealing plug 32 is disposed outside the main shaft 2 and located in the first receiving cavity 311 and sleeved with the inner wall 3111 of the first receiving cavity 311, the upper end face 321 of the sealing plug 32 abuts against the main shaft 2, and its lower end face 322 abuts against the bottom wall 3112 of the first receiving cavity 311.
[0062] The sealing plug 32 serves two purposes: firstly, it fills the gap at the connection between the main shaft 2 and the top cover 31, preventing external dust from entering the sleeve 1 from the first receiving cavity 311; secondly, the sealing plug 32 increases the friction between the main shaft 2 and the upper surface of the bottom wall 3112, which not only prevents the main shaft 2 from rotating under external interference, but also prevents wear between the main shaft 2 and the upper surface of the bottom wall 3112.
[0063] Furthermore, the first limiting component 3 also includes a first thrust bearing 33; the first thrust bearing 33 is disposed outside the main shaft 2 and located below the top cover 31 and between the first limiting component 3.
[0064] A first spring 8 is connected below the first thrust bearing 33; the first spring 8 is located on the outside of the main shaft 2 and a washer 10 is connected to the lower end of the first spring 8. A first retaining ring 9 is connected below the washer 10. The first retaining ring 9 is located on the outside of the main shaft 2. The first retaining ring 9 and the washer 10 cooperate to fix the first spring 8 and prevent the first spring 8 from moving axially downward.
[0065] It should be understood that with this design, when the main shaft 2 is subjected to an axial upward force, since the first thrust bearing 33 is connected to the first spring 8, the first spring 8 will be compressed and generate an axial upward force to compress the first thrust bearing 33. Furthermore, due to the stopping effect of the top cover 31, the first spring 8 cannot continue to move axially upward by compressing the first thrust bearing 33.
[0066] This design increases the stability of the main shaft 2 when it is rotated under external force, preventing the main shaft 2 from shaking. In addition, the first thrust bearing 33 is located between the first spring 8 and the top cover 31, which can also reduce the friction between the first spring 8 and the top cover 31.
[0067] In order to make the first thrust bearing 33 rotate more stably, the first spring 8 can generate an upward axial squeezing force to balance the downward axial squeezing force of the first thrust bearing 33. When the forces in the two directions are balanced, the upper end of the main shaft 2 is stably constrained in the sleeve 1, which can effectively prevent the main shaft 2 from shaking under the rotation of external forces.
[0068] In summary, the detachable torque device of this technical solution, when disassembled, firstly applies an upward axial force to the driving member 6, and simultaneously applies a downward force to the upper top of the main shaft 2. Under the action of the two forces, the second retaining spring 71 in the second limiting assembly 7 is exposed from the outside of the second receiving cavity 61, so that the user can remove the second retaining spring 71 from the main shaft 2. When the second retaining spring 71 is removed from the main shaft 2, the user can remove the second thrust bearing 72 from the main shaft 2, and the driving member 6 thus loses the constraint force on it by the second limiting assembly 7, allowing the user to remove the driving member 6 from below the sleeve 1.
[0069] After the driving member 6 is removed, the housing A is then removed, and the pin F that is inserted with the driven member 5 is removed from the sleeve 1, thereby removing the driven member 5 from the sleeve 1.
[0070] After the driven member 5 is removed, in order to facilitate the disassembly of the compression spring 4, the sleeve 1 is first disassembled and another outer shell A is removed to fully expose the entire compression spring 4. After removing the compression spring 4, other components of the detachable torque device are exposed, such as the pin F fixed on the moving member D and the moving member D. After removing these two, the first retaining ring 9 is exposed. The first retaining ring 9 is removed from the main shaft 2 to facilitate the further removal of the washer 10 and the first spring 8 from the main shaft 2.
[0071] After the first spring 8 is removed, the first thrust bearing 33 is exposed. The first thrust bearing 33 is separated from the top cover 31, and the upper part of the main shaft 2 loses the constraint at the connection with the top cover 31, so that the main shaft 2 can be separated from the top cover 31 in the axial upward direction, thereby completing the disassembly of the entire detachable torque device, which makes it convenient for users to replace and repair the corresponding parts.
[0072] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.
Claims
1. A detachable torque device, characterized in that, The device includes a sleeve having a hollow portion, the hollow portion having a main shaft arranged axially; the upper part of the main shaft cooperates with a first limiting component assembled at the sleeve, the first limiting component constraining the main shaft to move downward; a compression spring, a driven member, and a driving member that are driven by the driven member are arranged from top to bottom in the hollow portion of the sleeve, the compression spring, the driven member, and the driving member being sleeved from top to bottom on the outer periphery of the main shaft; The active component has a second receiving cavity that is open at the lower end and is arranged around the main shaft. The lower end of the main shaft is detachably connected to a second limiting component. The lower end of the compression spring abuts against the driven component and applies a downward elastic force to the driven component, so that the second limiting component is located in the second receiving cavity and abuts against the active component to constrain the active component from completely disengaging downward from the sleeve. When the active component is subjected to an upward force and compresses the compression spring, the active component moves upward along the axial direction, so that the second limiting component disengages from the active component and is exposed outside the second receiving cavity.
2. The detachable torque device as described in claim 1, characterized in that: The second limiting component includes a second retaining ring, which is detachably snapped into a groove located on the outer periphery of the spindle, and the second retaining ring abuts against the driving member.
3. The detachable torque device as described in claim 2, characterized in that: It also includes a second thrust bearing, which is sleeved on the outside of the main shaft and located in the second receiving cavity and is sleeved with an inner wall of the active member that forms the receiving cavity. The upper end face of the second thrust bearing abuts against the top wall of the second receiving cavity, and its lower end face abuts against the second retaining spring.
4. The detachable torque device as described in claim 1, characterized in that: The active component has a limiting part arranged radially outward, which is located below the lower end face of the sleeve and maintains a preset distance from the lower end face of the sleeve.
5. A detachable torque device as described in claim 4, characterized in that: The limiting part has a radially arranged mounting through hole that connects to the outside and the receiving cavity, and the mounting through hole is located below the main shaft.
6. A detachable torque device as described in claim 1, characterized in that: The first limiting component includes a top cover; The top cover has a first receiving cavity; The upper end of the main shaft is located in the first receiving cavity and abuts against the inner wall of the first receiving cavity.
7. A detachable torque device as described in claim 6, characterized in that: The top cover has a first limiting portion; The lower surface of the first limiting part abuts against the upper end surface of the sleeve.
8. A detachable torque device as described in claim 7, characterized in that: The first limiting component also includes a sealing plug; The sealing plug is located outside the main shaft and inside the first receiving cavity, and is sleeved with the inner wall of the first receiving cavity. The upper end face of the sealing plug abuts against the main shaft, and its lower end face abuts against the bottom wall of the first receiving cavity.
9. A detachable torque device as described in claim 1, characterized in that: It also includes the first thrust bearing; The first thrust bearing is located outside the main shaft and between the main shaft and the first limiting assembly.
10. A detachable torque device as described in claim 9, characterized in that: A first spring is connected below the first thrust bearing; The first spring is located on the outside of the main shaft and the lower end of the first spring is connected to a first retaining ring, which is located on the outside of the main shaft.