Counterforce device
By designing a highly adaptable reaction device, the problem of insufficient applicability of existing devices was solved, enabling efficient and safe operation of multi-point and multi-angle bolt tightening, thereby improving automobile manufacturing efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG LEAPMOTOR TECH CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-03
AI Technical Summary
In the automobile manufacturing process, existing reaction force devices can only be applied to a certain point or angle, which makes bolt tightening operations complicated and inefficient, unable to meet production requirements, and relying on manual force leads to safety hazards and poor consistency.
A reaction force device was designed, including a telescopic component and a clamp. By adjusting the angle of the clamp and the length of the telescopic part, it can adapt to the bolt tightening requirements at different points, angles and heights. Combined with a balancer to assist operation, it reduces reaction force and improves efficiency.
This technology enables the same reaction force device to be used for bolt tightening at various points and angles, reducing reliance on manual labor, improving the quality and efficiency of bolt tightening, reducing safety hazards, and meeting the needs of the production line.
Smart Images
Figure CN224445849U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automobile manufacturing technology, and in particular to a reaction device. Background Technology
[0002] In the automobile manufacturing process, the final assembly workshop is responsible for assembling the vehicle's components, such as tightening bolts on chassis mounts and frames. High-torque bolts are typically tightened using torque wrenches, but manual operation relies heavily on visual inspection and the worker's own strength to overcome the reaction force during tightening. This method is highly dependent on the worker's experience, technique, strength, and physical stamina, and suffers from inconsistent results and significant safety hazards, failing to meet the overall production requirements of the workshop. Utility Model Content
[0003] This application provides a reaction force device that can be applied to bolt tightening at different angles and points, thereby improving work efficiency.
[0004] To achieve the above objectives, the main technical solutions adopted in this application include:
[0005] This application provides a reaction device, including a telescopic assembly and a clamp. The telescopic assembly includes a sleeve and a telescopic part, the telescopic part being slidably connected inside the sleeve and having an extended end extending out of the sleeve. The clamp is adapted to be connected to a bolt tightening device, and the clamp is rotatable relative to the extended end to adjust the angle of the bolt tightening device.
[0006] The reaction device proposed in this application uses a clamp to fix the bolt tightening device. By rotating the clamp, the angle of the clamp can be adjusted, thereby adjusting the angle of the bolt tightening device, so that the bolt tightening device can be adapted to bolts at different points and angles. Furthermore, it can also be adapted to bolts of different heights by adjusting the length of the extension end of the telescopic part relative to the extension of the sleeve. Thus, the same reaction device can be used for bolt tightening work at multiple points and angles, thereby improving production efficiency.
[0007] Optionally, the clamp includes a first part and a second part connected at an angle, the first part being rotatable relative to the protruding end, and the second part securing the bolt tightening device.
[0008] In the above scheme, the first part rotates relative to the protruding end to adjust the angle of the second part, thereby changing the angle of the bolt tightening device, and thus making it suitable for bolt tightening work at different points and angles.
[0009] Optionally, the reaction device further includes an adapter having a mounting hole, and the first part is provided with a rotating shaft that is rotatably connected to the mounting hole.
[0010] In the above scheme, the adapter provides the mounting point for the first part, and the rotating shaft of the first part is installed in the mounting hole of the adapter, thereby realizing the adjustment of the angle of the first part, the second part and the bolt tightening device.
[0011] Optionally, a bearing is provided in the mounting hole, the inner ring of the bearing is fixedly connected to the rotating shaft, and the outer ring of the bearing is fixedly connected to the inner wall of the mounting hole.
[0012] In the above scheme, the bearing arrangement creates rolling friction between the shaft and the mounting hole, reducing the rotational resistance of the shaft.
[0013] Optionally, the adapter includes a connecting section and a mounting section, the connecting section being connected to the protruding end, and the mounting hole being located in the mounting section.
[0014] In the above scheme, the connecting end and the protruding end are fixedly connected, and the rotating shaft of the first part is installed in the mounting hole of the mounting section.
[0015] Optionally, the mounting section has a flange on the side away from the connecting section, the flange having at least one first through hole, and the first part having a plurality of second through holes spaced apart along the circumference of the rotating shaft; the reaction device further includes at least one positioning pin, each positioning pin passing through a corresponding first through hole and a corresponding second through hole to restrict the rotation of the first part relative to the flange.
[0016] In the above scheme, after the angle of the first part is adjusted to the predetermined position, the first part is fixed to the flange of the installation section by the positioning pin, thereby restricting the rotation of the clamp and bolt tightening device.
[0017] Optionally, the outer peripheral surface of the mounting section is provided with at least one positioning part, the positioning part is provided with a third through hole, the third through hole is disposed opposite to the corresponding first through hole, and the positioning pin passes through the corresponding third through hole and the corresponding first through hole to selectively cooperate with the corresponding second through hole.
[0018] In the above solution, the positioning pin can be installed in the third through hole without being pulled out, which is simple and convenient to operate and saves time in taking out and installing the positioning pin.
[0019] Optionally, the reaction device further includes a first limiting part and a second limiting part. The first limiting part is disposed on the outer peripheral surface of the protruding end, and the second limiting part is disposed on the outer peripheral surface of the sleeve and located above the first limiting part. Along the axial direction of the sleeve, the first limiting part and the second limiting part are at least partially disposed opposite to each other.
[0020] In the above scheme, when the telescopic part retracts toward the sleeve until at least part of the first limiting part and the second limiting part abuts, the first limiting part and the second limiting part can restrict the protruding end from continuing to move into the sleeve.
[0021] Optionally, the reaction device further includes a balancer, the housing of which is fixed to the sleeve, and the telescopic end of which is connected to the protruding end.
[0022] In the above scheme, the balancer is used to suspend the telescopic part, the adapter, the clamp and the bolt tightening device, and after the bolt tightening device has finished working, the balancer can assist in pulling the telescopic part, the adapter, the clamp and other components to rise.
[0023] Optionally, the chuck is provided with a first handle. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a front view of the reaction device of this application;
[0026] Figure 2 This is a perspective view of the reaction device of this application;
[0027] Figure 3 This is a partial cross-sectional view of the reaction device of this application.
[0028] [Explanation of Labels in the Attached Image]
[0029] 1. Telescopic assembly; 11. Sleeve; 12. Telescopic part; 121. Extending end;
[0030] 2. Chuck; 21. First part; 210. Second through hole; 211. Rotating shaft; 22. Second part;
[0031] 3. Bolt tightening device;
[0032] 4. Adapter; 40. Mounting hole; 41. Connecting section; 411. Flange; 411a. First through hole; 42. Mounting section; 43. Bearing;
[0033] 5. Positioning pin;
[0034] 6. Positioning section;
[0035] 71. First limiting part; 72. Second limiting part;
[0036] 81. First-in-command; 82. Second-in-command; 83. Balancer. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.
[0039] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.
[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0041] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0042] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).
[0043] In the automobile manufacturing process, a large number of bolts are tightened on components such as chassis mounts and frames. Bolts with a torque greater than 60 N·m are called high-torque bolts (except for special locations). During the tightening of high-torque bolts, a large reaction force is generated. If only manual force is used, it is easy to cause worker fatigue and poor consistency in bolt tightening, resulting in significant safety hazards. This makes it impossible to meet production requirements. Furthermore, when the reaction force generated during bolt tightening cannot be overcome and tightening fails, the production line needs to be stopped for re-tightening, repair, and reassembly, resulting in resource waste.
[0044] In addition, the current reaction force device can only be applied to a certain point or angle. For bolts at other points, the reaction force device needs to be replaced to adjust the angle of the bolt tightening device, which is complicated and time-consuming.
[0045] Therefore, a reaction force device that can be applied to the production line is needed to reduce the reaction force that occurs during the tightening of bolts and to improve the quality and efficiency of bolt tightening.
[0046] This application provides a reaction device, referring to... Figures 1 to 3 The reaction device includes a telescopic component 1 and a clamp 2. The telescopic component 1 includes a sleeve 11 and a telescopic part 12. The telescopic part 12 is slidably connected inside the sleeve 11 and has an extension end 121 that extends out of the sleeve 11. The clamp 2 is adapted to be connected to a bolt tightening device 3. The clamp 2 is rotatable relative to the extension end 121 to adjust the angle of the bolt tightening device 3.
[0047] The sleeve 11 can be installed on the slide rail at the top of the workshop. The reaction device is pulled along the slide rail to the desired position for bolt tightening, and then the subsequent operation is carried out. The telescopic part 12 is slidably connected inside the sleeve 11. The length of the telescopic part 12 extending out of the sleeve 11 can be adjusted to adjust the height of the clamp 2 and the bolt tightening device 3.
[0048] The reaction device proposed in this application embodiment uses a clamp 2 to fix a bolt tightening device 3. By rotating the clamp 2, the angle of the clamp 2 can be adjusted, thereby adjusting the angle of the bolt tightening device 3, so that the bolt tightening device 3 can be adapted to bolts at different points and angles. Furthermore, by adjusting the length of the extension end 121 of the telescopic part 12 relative to the sleeve 11, it can be adapted to bolts of different heights, thereby realizing that the same reaction device can be used for bolt tightening work at multiple points and angles, thus improving production efficiency.
[0049] The reaction force device disclosed in this application can be used to reduce the reaction force generated during the tightening of high-torque bolts in automobile manufacturing, thereby improving the installation quality and efficiency of the bolts. Before tightening the high-torque bolts, the bolt fastening device is installed on the reaction force device, and then the bolt fastening device is aligned with the bolt and tightened until it is properly tightened. Using this tightening reaction force device can effectively reduce the reaction force generated during bolt tightening, with less reliance on personnel's subjective judgment, experience, or strength, thus improving the stability of the tightening process and meeting production requirements.
[0050] Optionally, refer to Figures 1 to 3 The clamp 2 includes a first part 21 and a second part 22 connected at an angle. The first part 21 is rotatable relative to the protruding end 121, and the second part 22 secures the bolt tightening device 3. The second part 22 is located on the side of the first part 21 away from the protruding end 121 so that there is no interference between the bolt tightening device 3 and the telescopic section. Exemplarily, the first part 21 and the second part 22 are vertically arranged. Alternatively, the included angle between the first part 21 and the second part 22 is greater than 90°.
[0051] The first part 21 rotates relative to the protruding end 121 to adjust the angle of the second part 22, thereby changing the angle of the bolt tightening device 3, and thus making it suitable for bolt tightening work at different points and angles.
[0052] Optionally, refer to Figure 2 and Figure 3 The reaction device also includes an adapter 4, which has a mounting hole 40. The first part 21 is provided with a rotating shaft 211, which is rotatably connected to the mounting hole 40. The adapter 4 provides a mounting point for the first part 21. The rotating shaft 211 of the first part 21 is installed in the mounting hole 40 of the adapter 4, and the rotating shaft 211 of the first part 21 can rotate within the mounting hole 40 to adjust the angle of the first part 21, thereby adjusting the angle of the second part 22 and the bolt tightening device 3.
[0053] Optionally, refer to Figure 3 A bearing 43 is installed inside the mounting hole 40. The inner ring of the bearing 43 is fixedly connected to the rotating shaft 211, and the outer ring of the bearing 43 is fixedly connected to the inner wall of the mounting hole 40. The bearing 43 creates rolling friction between the rotating shaft 211 and the mounting hole 40, reducing the rotational resistance of the rotating shaft 211.
[0054] Optionally, refer to Figures 1 to 3 The adapter 4 includes a connecting section 41 and a mounting section 42. The connecting section 41 is connected to the protruding end 121, and the mounting hole 40 is provided in the mounting section 42. The connecting end is fixedly connected to the protruding end 121, and the rotating shaft 211 of the first part 21 is installed in the mounting hole 40 of the mounting section 42.
[0055] For example, the mounting section 42 is connected to the connecting section 41 at an angle, that is, the extension direction of the mounting section 42 is different from that of the connecting section 41 and the extension direction of the telescopic end. For example, the mounting section 42 is set perpendicular to the connecting section 41 so that the clamp 2 is installed on one side of the telescopic part 12 so that the bolt tightening device 3 will not interfere with the telescopic part 12 during use.
[0056] Optionally, refer to Figure 2 and Figure 3 The mounting section 42 has a flange 411 on the side away from the connecting section 41. The flange 411 has at least one first through hole 411a. The first part 21 has a plurality of second through holes 210. The plurality of second through holes 210 are spaced apart along the circumference of the rotating shaft 211. The reaction device also includes at least one positioning pin 5. Each positioning pin 5 passes through the corresponding first through hole 411a and the corresponding second through hole 210 to restrict the rotation of the first part 21 relative to the flange 411.
[0057] Flange 411 is used to fix the first part 21. The positioning pin 5 passes through the first through hole 411a and is fixed to the corresponding second through hole 210, thereby restricting the rotation of the first part 21 relative to the flange 411. That is, after the angle of the first part 21 is adjusted to the predetermined position, the positioning pin 5 fixes the first part 21 to the flange 411 of the mounting section 42, thereby restricting the rotation of the clamp 2 and the bolt tightening device 3.
[0058] It should be understood that there can be one first through hole 411a and one locating pin 5. When the torque is small, one locating pin 5 can be used to fix the chuck 2. When the torque is large, multiple locating pins 5 and multiple second through holes 210 are required, such as two or more.
[0059] In addition, after the first part 21 rotates relative to the flange 411, there is still a second through hole 210 corresponding to the first through hole 411a, so that no matter which position the first part 21 rotates relative to the flange 411, there is always a second through hole 210 and a first through hole 411a corresponding to each other, so that the positioning pin 5 can be inserted.
[0060] Optionally, refer to Figure 1 and Figure 2 The outer peripheral surface of the mounting section 42 is provided with at least one positioning part 6. The positioning part 6 is provided with a third through hole. The third through hole is arranged opposite to the corresponding first through hole 411a. The positioning pin 5 passes through the corresponding third through hole and the corresponding first through hole 411a to selectively cooperate with the corresponding second through hole 210.
[0061] The outer circumferential surface of the mounting section 42 can be a single positioning part 6, or multiple positioning parts 6 spaced circumferentially along the mounting hole 40. The positioning pin 5 is held within the third through hole of the positioning part 6. Even if the first part 21 of the clamp 2 and the flange 411 are released from fixation, the positioning pin 5 can simply be pulled out from the second through hole 210 of the first part 21. When the first part 21 and the flange 411 need to be fixed, the positioning pin 5 can simply be inserted into the corresponding first through hole 411a and the corresponding second through hole 210. In other words, the positioning pin 5 can be installed in the third through hole without being pulled out, making the operation simple and convenient, and saving time in removing and installing the positioning pin 5.
[0062] For example, the outer peripheral surface of the mounting section 42 is symmetrically provided with two positioning parts 6 along the circumferential direction of the mounting hole 40. The reaction device includes two positioning pins 5, and a handle for connecting the two positioning pins 5 is provided between the two positioning pins 5. The two positioning pins 5 can be installed or removed at the same time by pulling the handle.
[0063] Optionally, the reaction device further includes a first limiting part 71 and a second limiting part 72. The first limiting part 71 is disposed on the outer peripheral surface of the protruding end 121, and the second limiting part 72 is disposed on the outer peripheral surface of the sleeve 11 and located above the first limiting part 71. Along the axial direction of the sleeve 11, the first limiting part 71 and the second limiting part 72 are at least partially disposed opposite to each other.
[0064] The sleeve 11 is suspended on the slide rail at the top of the workshop by a structure such as a flange. The second limiting part 72 is provided on the outer peripheral surface of the lower end of the sleeve 11, the first limiting part 71 is provided on the outer peripheral surface of the protruding end 121, and the second limiting part 72 is located above the second limiting part 72. When the telescopic part 12 retracts upward toward the sleeve 11 until at least part of the first limiting part 71 and the second limiting part 72 abut, the first limiting part 71 and the second limiting part 72 can restrict the protruding end 121 from continuing to move into the sleeve 11.
[0065] Optionally, refer to Figure 1 The reaction device also includes a balancer 83, the housing of which is fixed to the outer circumferential surface of the sleeve 11, and the telescopic end of the balancer 83 is connected to the extended end 121. The balancer 83 can be a mechanical balancer or an actuated balancer. Exemplarily, the balancer 83 comprises components such as a spring, pulley, rope, and housing. The spring is housed within the housing and is used to store and release energy. When a load is applied to the spring, the spring is compressed or stretched, thereby storing energy. When the load is reduced or removed, the spring releases the stored energy, helping the balancer 83 return to its original position. The pulley in the spring balancer 83 serves to guide and support the rope; the rope connects the load and the spring balancer 83.
[0066] The balancer 83 is used to suspend the telescopic part 12, the adapter 4, the clamp 2 and the bolt tightening device 3. After the bolt tightening device 3 has finished working, the balancer 83 can assist in pulling the telescopic part 12, the adapter 4, the clamp 2 and other components to rise.
[0067] For example, the protruding end 121 is provided with a mounting plate for fixed connection with the adapter 4, and the telescopic end of the balancer 83 is connected to the mounting plate by a hook.
[0068] Optionally, refer to Figure 1 and Figure 2 The chuck 2 is equipped with a first handle 81, and the connecting section 41 of the adapter 4 is equipped with a second handle 82. The bolt fastening device installed on the chuck 2 is engaged with the bolt to be tightened by manually pulling the first handle 81 or the second handle 82. For example, the first handle 81 and the second handle 82 are cylindrical structures, steel pipes wrapped with rubber for easy gripping, with a length of 105mm and a radius of 17.5mm respectively, and are bolted to the chuck 2 or the adapter 4.
[0069] For example, the sleeve 11 in this application is a cylindrical structure with flanges at the ends for fixing or connecting the sleeve 11. The sleeve 11 has a maximum length of 817 mm, a radius of 30 mm, is made of Q235 steel, and is machined. The balancer 83 is a 15-22 KG specification used to suspend the overall reaction device. It has a maximum width of 126 mm and a radius of 105 mm. The adapter 4 is a cylindrical structure with flanges 411 at the ends for fixing and connecting to each other. It has a thickness of 10 mm, a radius of 80 mm, is made of Q235 steel, and is machined.
[0070] The specific method of using the reaction device in this application is as follows: Taking the tightening of the drive motor mounting bolt as an example, when tightening the mounting bolt on the electric drive sub-assembly line in the final assembly workshop, the worker first pre-tightens the bolt into the corresponding threaded hole, then moves the reaction device to the position of the bolt to be tightened, aligns the bolt tightening device 3 with the bolt, and then tightens it vertically until it is properly tightened. After the work is completed, the reaction device is reset. This reaction device can assist workers in tightening, reduce reaction force, improve installation quality and efficiency, and reduce safety hazards. Furthermore, the processing and manufacturing cycle of this reaction device is short, the structure is simple, and it is convenient to use, place, and retrieve. While ensuring functionality, safety, and quality, it can maximize efficiency, reduce personnel fatigue, and meet production requirements.
[0071] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0072] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.
[0073] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
[0074] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A counterforce device, characterized in that, include: The telescopic assembly (1) includes a sleeve (11) and a telescopic part (12), the telescopic part (12) being slidably connected inside the sleeve (11), and the telescopic part (12) having an extension end (121) extending out of the sleeve (11); A chuck (2) adapted to be connected to a bolt tightening device (3), the chuck (2) being rotatable relative to the protruding end (121) to adjust the angle of the bolt tightening device (3).
2. The counterforce device of claim 1, wherein, The clamp (2) includes a first part (21) and a second part (22) connected at an angle. The first part (21) is rotatable relative to the protruding end (121), and the second part (22) fixes the bolt tightening device (3).
3. The counterforce device of claim 2, wherein, It also includes an adapter (4) having a mounting hole (40), and the first part (21) is provided with a rotating shaft (211) which is rotatably connected to the mounting hole (40).
4. The counterforce device of claim 3, wherein, A bearing (43) is provided in the mounting hole (40). The inner ring of the bearing (43) is fixedly connected to the rotating shaft (211), and the outer ring of the bearing (43) is fixedly connected to the inner wall of the mounting hole (40).
5. The counterforce device of claim 3, wherein, The adapter (4) includes a connecting section (41) and a mounting section (42), the connecting section (41) being connected to the protruding end (121), and the mounting hole (40) being provided in the mounting section (42).
6. The reaction device according to claim 5, characterized in that, The mounting section (42) has a flange (411) on the side away from the connecting section (41), the flange (411) is provided with at least one first through hole (411a), the first part (21) is provided with a plurality of second through holes (210), and the plurality of second through holes (210) are spaced apart along the circumference of the rotating shaft (211); The reaction device further includes at least one locating pin (5), each of the locating pins (5) passing through the corresponding first through hole (411a) and the corresponding second through hole (210) to restrict the first part (21) from rotating relative to the flange (411).
7. The counterforce device of claim 6, wherein, The outer peripheral surface of the mounting section (42) is provided with at least one positioning part (6), the positioning part (6) is provided with a third through hole, the third through hole is disposed opposite to the corresponding first through hole (411a), and the positioning pin (5) passes through the corresponding third through hole and the corresponding first through hole (411a) to selectively cooperate with the corresponding second through hole (210).
8. The counter-force device of claim 1, wherein, The reaction device further includes a first limiting part (71) and a second limiting part (72). The first limiting part (71) is disposed on the outer peripheral surface of the protruding end (121), and the second limiting part (72) is disposed on the outer peripheral surface of the sleeve (11) and located above the first limiting part (71). Along the axial direction of the sleeve (11), the first limiting part (71) and the second limiting part (72) are at least partially disposed opposite to each other.
9. The counter-force device of claim 1, wherein, It also includes a balancer (83), the housing of which is fixed to the sleeve (11), and the telescopic end of the balancer (83) is connected to the protruding end (121).
10. The reaction device according to claim 2, characterized in that, The chuck (2) is provided with a first handle (81).