Automatic tightening bolt centering mechanism
By designing a centering floating module, utilizing the elastic support network of clamps and elastic elements, as well as the rolling distribution of thrust balls, the problem of bolt hole misalignment in traditional tightening mechanisms is solved, achieving automatic centering and stable tightening, thus improving the reliability and service life of the equipment.
Patent Information
- Application Number
- CN202520492881.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Traditional automatic bolt tightening mechanisms suffer from factors such as product placement angle deviation, unstable bolt rotation angle, or unbalanced force points, causing the bolt and product bolt hole positions to deviate from horizontal equilibrium, affecting tightening force and assembly quality.
The centering floating module, including clamps, multiple second elastic elements and a planar bearing mechanism, achieves adaptive centering during bolt tightening through the elastic support network and the rolling distribution of thrust balls, reducing bolt misalignment.
It achieves automatic alignment during bolt tightening, improving tightening effect and assembly quality, extending equipment service life and enhancing reliability.
Smart Images
Figure CN223947796U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to automatic assembly technical field especially relates to a kind of automatic tightening bolt centering mechanism. BACKGROUND
[0002] In the field of automatic assembly, the mechanism of automatic tightening bolt is widely used in the assembly process of various products. This kind of mechanism can quickly and accurately tighten the bolt through pre-set program and power device, thereby improving production efficiency. However, the traditional tightening mechanism usually adopts fixed clamping module to connect screwdriver head. When the mechanism of automatic tightening bolt is tightening the bolt, due to the deviation of product placement angle, the instability of bolt rotation angle or the imbalance of force point and other factors, it often leads to the deviation between the tightened bolt and the product bolt hole. This deviation not only affects the tightening effect of the bolt, but also may cause the bolt position to be incorrect, thereby affecting the overall assembly quality of the product. SUMMARY
[0003] Therefore, in order to solve the above problems, the utility model provides an automatic tightening bolt centering mechanism, which comprises a centering floating module.
[0004] The centering floating module comprises:
[0005] a clamping clamp, the inner side of which is matched with the fixed point of the device, and a limiting step is protruded outward at the end of the clamping clamp;
[0006] a mounting block, which has a first insertion hole for inserting the device, and the clamping clamp is set corresponding to the first insertion hole and is relatively movable with the mounting block, and a second elastic member is arranged between the limiting step and the mounting block, and the second elastic member is provided with a plurality of second elastic members arranged around the outer side of the clamping clamp.
[0007] The utility model fixes the tightening device at the middle position by clamping the tightening device with the clamping clamp. The plurality of second elastic members arranged around the clamping clamp form a ring-shaped elastic support network, which provides elastic deformation amount in multiple directions for the clamping clamp. When not under stress, the clamping clamp as a whole remains balanced through the elastic support of the second elastic member. When tightening operation is performed, due to the different stress of each second elastic member, the compression amount of each second elastic member is different, so that the tightening device is inclined at a certain angle to adapt to the deviation of the bolt hole, and the automatic centering of the bolt in the bolt tightening work is realized, which reduces the problem of incorrect bolt position.
[0008] Further, the centering floating module further comprises:
[0009] The shell is fixedly installed on the mounting block, the clamp and the second elastic member are wrapped in the shell, and the shell is provided with a second jack for the first jack;
[0010] The first elastic member is fixedly installed on the shell, the first elastic member is arranged along the radial direction of the clamp, a plurality of first elastic members are arranged around the outer side of the clamp, and one end of the first elastic member is in contact with the outer side of the package.
[0011] The first elastic member provides radial elastic support for the clamp, enhances the stability and deformation capacity of the clamp under force, and when one side is subjected to greater force, the mechanism deviates from the center, and the second elastic member pushes the clamp to the center due to the force, thereby realizing the central balance of the tightening device as a whole.
[0012] Further, the centering floating module further comprises a plane bearing mechanism, the plane bearing mechanism is arranged between the clamp and the shell corresponding to the first jack, and the plane bearing mechanism comprises:
[0013] The retainer is annular, a plurality of thrust ball holes are arranged on the surface of the retainer, and the plurality of thrust ball holes are arranged along the circumferential direction of the retainer;
[0014] Thrust ball; the thrust ball is embedded in the thrust ball hole, and the thrust ball is in short contact with the clamp.
[0015] The thrust ball can freely float in multiple directions in the hole, and when force is applied, the force can be uniformly distributed on the bearing surface through rolling and sliding of the thrust ball, thereby reducing stress concentration, prolonging service life, and improving overall reliability of the equipment.
[0016] Further, the material of the retainer is engineering plastic.
[0017] By using smooth and wear-resistant materials such as polytetrafluoroethylene or other engineering plastics, the weight is reduced, and the friction of the ball is also reduced.
[0018] Further, the plane bearing mechanism further comprises a gasket, and the gasket is arranged on the surface of the retainer away from the clamp.
[0019] Further, the centering mechanism further comprises a linear floating module, and the linear floating module comprises:
[0020] The fixed block is in sliding relationship with the mounting block;
[0021] The third elastic member is arranged between the fixed block and the shell.
[0022] Further, the linear floating module further comprises:
[0023] A guide rail is fixedly installed on the mounting block and arranged along the movement direction of the third elastic member;
[0024] A sliding block is fixed relative to the fixed block and in sliding cooperation with the guide rail.
[0025] Further, a limiting block fixed on the mounting block is arranged at both ends of the guide rail.
[0026] When the mechanism performs the tightening work, the third elastic member can be contracted by a certain range when contacting the product, so as to buffer part of the impact and avoid too large impact to cause the product to be deformed or damaged.
[0027] The utility model has the following advantages:
[0028] The utility model discloses a tightening device is fixed in the middle position through the embrace clamp ring, and a plurality of second elastic members arranged around the embrace clamp form annular elastic support network and simultaneously provide elastic deformation amount for the embrace clamp in multiple directions. When not under stress, the embrace clamp as a whole keeps balance through the elastic support of the second elastic member. When performing the tightening work, the compression amount of each second elastic member is different due to the different stress of each second elastic member, so that the tightening device is inclined by a certain angle to be self-adaptive according to the bolt hole position deviation, realizes the automatic centering of the bolt in the bolt tightening work and reduces the problem of the incorrect bolt position. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 It is the structure schematic diagram of the centering mechanism.
[0030] Figure 2 It is the side surface schematic diagram of the centering mechanism. Figure 1
[0031] Figure 3 It is the sectional view schematic diagram of the centering floating module in the centering mechanism. Figure 1
[0032] Figure 4 It is the internal structure schematic diagram of the centering mechanism. Figure 3
[0033] Figure 5 It is the structure schematic diagram of the embrace clamp in the centering mechanism. Figure 4
[0034] Figure 6 It is the structure schematic diagram of the plane bearing mechanism in the centering mechanism. Figure 4
[0035] It is the schematic diagram of the tightening device being installed in the centering mechanism. Figure 7 Figure 1
[0036] Fig. 1 is a schematic view of an automatic screwing device according to an embodiment of the present application;
[0037] 10, centering floating module; 11, mounting block; 11A, first insertion hole; 12, housing; 13, connecting bolt; 14, clamping; 14A, limiting step; 14B, limiting hole; 15, planar bearing mechanism; 15A, retainer; 15B, thrust ball; 15C, gasket; 16, first elastic member; 17, second elastic member;
[0038] 20, linear floating module; 21, fixed block; 22, sliding block; 23, limiting block; 24, guide rail; 25, third elastic member;
[0039] 30, tightening device. DETAILED DESCRIPTION
[0040] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.
[0041] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0042] As described in the background, conventional tightening mechanisms usually use fixed clamping modules to connect screwdriver heads. When the automatic screwing mechanism is screwing the bolt, due to the deviation of the product placement angle, the instability of the bolt rotation angle, or the imbalance of the force point, and other factors, it often leads to the deviation of the tightened bolt from the horizontal balance state with the product bolt hole.
[0043] Embodiment 1:
[0044] Therefore, in order to solve the above technical problems existing in the prior art, the present embodiment provides an automatic screwing centering mechanism, as shown in the drawings, Figure 1 The centering mechanism includes a centering floating module 10, which is sleeved outside the device;
[0045] As shown in the drawings, Figure 3 , 4 The centering floating module includes:
[0046] Clamp 14, the inside of the clamp matches the device fixed point, as Figure 5 shown, the clamp end has outwardly protruding limiting step 14A;
[0047] Mounting block 11, the mounting block has a first insertion hole 11A for device insertion, the clamp as a whole corresponds to the first insertion hole, and the mounting block is relatively movable, a plurality of second elastic members 17 are arranged between the limiting step and the mounting block.
[0048] In this embodiment, the second elastic member can be selected as a spring, as Figure 5 shown, a limiting hole 14B can be provided on the surface of the limiting step of the clamp, one end of the spring can be inserted into the limiting hole, and a connecting bolt 13 can be threadedly inserted at a position corresponding to the limiting hole of the mounting block, and the other end of the spring can be sleeved outside the connecting bolt. Through the limiting hole and the connecting bolt, the linear displacement of the spring in the radial direction can be positioned, avoiding the spring from being detached and causing floating failure.
[0049] As Figure 7 shown, the clamp of the present embodiment clamps the tightening device 30 to fix the tightening device at the middle position, and the plurality of second elastic members arranged around the clamp form a ring-shaped elastic support network to provide elastic deformation amount in multiple directions for the clamp. When not under force, the clamp as a whole is kept balanced by the elastic support of the second elastic members. When tightening operation is performed, due to different forces acting on each second elastic member, the compression amount of each second elastic member is different, so that the tightening device is inclined at a certain angle, and then self-adapts according to the deviation of the bolt hole position, realizes automatic centering of the bolt in the bolt tightening work, and reduces the problem of incorrect bolt position.
[0050] As Figure 3 shown, the centering floating module can further include:
[0051] Housing 12, the housing is fixedly installed on the mounting block, the clamp and the second elastic member are wrapped in the housing, and the housing is provided with a second insertion hole for the first insertion hole;
[0052] First elastic member 16, the first elastic member is fixedly installed on the housing, the first elastic member is arranged in the radial direction of the clamp, a plurality of first elastic members are arranged around the outer side of the clamp, and one end of the first elastic member is in contact with the outer side of the package.
[0053] The first elastic member can provide radial elastic support for the clamp, thereby enhancing the stability and deformation capacity of the clamp when subjected to force. When one side is subjected to greater force, the mechanism deviates from the center, and the second elastic member will push the clamp to the center due to the force, thereby achieving the overall centering balance of the tightening device.
[0054] In this embodiment, the first elastic member can be a spring plunger.
[0055] As shown in Figure 4 , the centering floating module can further include a plain bearing mechanism 15 arranged between the clamp and the shell corresponding to the first insertion hole, as shown in Figure 6 , the plain bearing mechanism includes:
[0056] a retainer 15A in the form of a ring, a plurality of thrust ball holes are arranged on the surface of the retainer;
[0057] a thrust ball 15B embedded in the thrust ball hole, the thrust ball is in short contact with the clamp.
[0058] As shown in Figure 7 , when installing the tightening device, the tightening device can be sequentially passed through the second insertion hole, the plain bearing mechanism, the clamp, the first insertion hole, then the clamp locking bolt is adjusted to fix the tightening device, and finally the shell and the mounting block are fixed. The shell and the mounting block can be fixed and connected by bolts, screws, buckles, etc.
[0059] In this embodiment, the thrust ball in the retainer can freely float in multiple directions in the hole. When tightening, the thrust ball will roll and slide along the axis direction of the thrust ball hole, thereby uniformly distributing the force on the bearing surface, reducing stress concentration, prolonging the service life, and improving the overall reliability of the equipment.
[0060] For example, the material of the retainer is engineering plastic, such as polytetrafluoroethylene or other engineering plastic and smooth wear-resistant materials.
[0061] This embodiment is made of polytetrafluoroethylene or other engineering plastics and smooth wear-resistant materials, which can reduce weight, increase lubricity, and reduce the friction of the ball.
[0062] In this embodiment, as shown in Figure 6 , the plain bearing mechanism further includes a gasket 15C arranged on the surface of the retainer away from the clamp.
[0063] The ball position is limited by the cooperation of the retainer and the gasket, the ball is prevented from sliding out during rotation, the stability of the bearing structure is improved, and the overall reliability of the equipment is improved.
[0064] In the embodiment, the planar ball bearing mechanism can cooperate with the spring plunger and the spring to keep the position of the mechanism balanced and improve the reliability of the mechanism.
[0065] As shown in Figure 1 The centering mechanism further comprises a linear floating module 20, as shown in Figure 2 The linear floating module comprises:
[0066] A fixed block 21, the fixed block keeps sliding relative to the mounting block;
[0067] A third elastic member 25 is arranged between the fixed block and the housing.
[0068] Further, the linear floating module further comprises:
[0069] A guide rail 24 is fixedly arranged on the mounting block and arranged along the movement direction of the third elastic member;
[0070] A sliding block 22 is fixed relative to the fixed block and keeps sliding with the guide rail.
[0071] Further, a limiting block 23 is arranged at both ends of the guide rail and fixed on the mounting block.
[0072] In the embodiment, the fixed block can be connected with a mechanical arm, a servo mechanism or the like to drive the movement of the entire centering mechanism. When the mechanism performs the tightening work, the tightening device contacts the product, so that the centering floating module moves linearly along the guide rail, and the third elastic member is contracted by a certain amplitude, so as to buffer part of the impact and avoid excessive impact to cause the product to be deformed or damaged.
[0073] In the embodiment, the third elastic member can be a spring.
[0074] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An automatic bolting centering mechanism, characterized in that, The centering floating module is sleeved outside the device; The centering floating module comprises: A clamping clamp, the inner side of which is matched with the fixed point of the device, and the end of which has an outwardly protruding limiting step; An installation block, which has a first insertion hole for the device to be inserted, and the clamping clamp is arranged in the first insertion hole as a whole and is relatively movable with the installation block, and a second elastic member is arranged between the limiting step and the installation block, and the second elastic member is provided in a plurality of forms and is arranged around the outer side of the clamping clamp.
2. An automatic bolting centering mechanism according to claim 1, characterized in that, The centering floating module further comprises: A shell, which is fixedly installed on the installation block, and the clamping clamp and the second elastic member are wrapped in the shell, and the shell is provided with a second insertion hole for the first insertion hole; A first elastic member, which is fixedly installed on the shell, is arranged along the radial direction of the clamping clamp, and the first elastic member is provided in a plurality of forms and is arranged around the outer side of the clamping clamp, and one end of the first elastic member is in surface contact with the outer side of the shell.
3. An automatic bolting centering mechanism according to claim 2, characterized in that, The centering floating module further comprises a planar bearing mechanism, which is arranged between the clamping clamp and the shell corresponding to the first insertion hole, and the planar bearing mechanism comprises: A retainer, which is annular, and a plurality of thrust ball holes are arranged on the surface of the retainer along the circumferential direction of the retainer; A thrust ball, which is embedded in the thrust ball hole, and the thrust ball is in short contact with the clamping clamp.
4. An automatic bolting centering mechanism according to claim 3, characterized in that, The material of the retainer is engineering plastic.
5. An automatic bolting centering mechanism according to claim 3, wherein The planar bearing mechanism further comprises a gasket, which is arranged on the surface of the retainer away from the clamping clamp.
6. An automatic bolting centering mechanism according to claim 2, wherein, The centering mechanism further comprises a linear floating module, and the linear floating module comprises: A fixed block, which is relatively slidable with the installation block; A third elastic member, which is arranged between the fixed block and the shell.
7. An automatic bolting centering mechanism according to claim 6, characterized in that The linear floating module further comprises: A guide rail, which is fixedly installed on the installation block and is arranged along the movement direction of the third elastic member; A sliding block, which is relatively fixed with the fixed block and is in sliding cooperation with the guide rail.
8. An automatic bolting centering mechanism according to claim 7, characterized in that, Limiting blocks are arranged at both ends of the guide rail and are fixed on the installation block.