An inertial force balancer and elbow structure for suppressing gap impacts

Abstract

This invention relates to an inertial force balancer and an elbow structure for suppressing gap impact. A first elastic element is provided between the first and second supports of the inertial force balancer. A second elastic element of the first support can cooperate with the second support to buffer the inertial force of the first elastic element's return stroke. The second support can reciprocate relative to the first support along the extension / retraction direction of the first elastic element. The second support is connected to a roller assembly. In the elbow structure, the rearward-moving main connecting rod can roll and cooperate with the roller assembly to push the second support to move. It can simultaneously withstand contact force and torque. The reaction force of the first elastic element ensures contact between the moving parts of the main connecting rod. The second elastic element prevents impact damage to the inertial force balancer components caused by the first elastic element. This invention overcomes the defects of machine vibration, noise, and low slider running accuracy caused by unbalanced inertial forces generated during high-speed operation of the elbow press, solving the technical problem of vibration and noise reduction during high-speed operation of the elbow press.

Description

Technical Field

[0001] This invention belongs to the field of toggle-type presses, specifically relating to an inertial force balancer and toggle structure for suppressing gap impact. Background Technology

[0002] Clearance between components is one of the fundamental causes of periodic impacts, and it is widely present in linkage mechanisms. The microscopic contact, separation, and impact processes caused by clearance in rotating pairs are characterized by discontinuity and nonlinear friction. Due to the requirements of installation and manufacturing processes, as well as wear during operation, clearances inevitably exist in the rotating pairs of elbow-link structures and gear pairs. Although the clearances cause relatively small positional errors in the mechanism, periodic separation and contact phenomena occur between the elements of the moving pairs during high-speed motion. When they re-contact, they trigger severe impacts in the mechanism, resulting in machine vibration, noise, disruption of the lubricating oil film formation, accelerated wear of the rotating pair contact surfaces, and the generation of unbalanced inertial force impacts.

[0003] Meanwhile, the existing design of toggle-type press mechanisms only includes the basic design of machine parts, lacking optimization of the press's linkage parameters. Once the press is manufactured, its linkage parameters cannot be changed. If these parameters are unreasonable, severe unbalanced inertial force impacts will occur during actual operation after machine processing and assembly, resulting in significant impact noise and affecting the machine's working accuracy.

[0004] Therefore, while the elbow structure used in high-speed heavy-duty servo presses has the advantage of response path curve design, it also features complex mechanisms and large unbalanced forces. Its main drawbacks are: it is easily subjected to unbalanced inertial forces during high-speed operation, causing structural elastic deformation, noise impact, accelerated wear and heat generation of the rotating joint, and reduced slider movement and workpiece manufacturing accuracy. Traditional pressure spring buffer structures can often only withstand unidirectional translational forces, while the linkage motion in the elbow structure is a combination of translational and rotational motions. When the linkage contacts the pressure spring buffer structure, contact force and torque are generated simultaneously. Traditional pressure spring buffers cannot withstand contact force and torque simultaneously, which can easily cause the buffer mechanism to collapse. The inertial force of the pressure spring buffer can also easily cause impact damage to the buffer mechanism, making it difficult to achieve the goal of suppressing the impact of the elbow structure gap.

[0005] Secondly, the gap separation impact of the main connecting rod big end of different presses varies. The traditional pressure spring buffer structure is not easy to adjust the compression of the pressure spring, which cannot meet the requirements of different working conditions and has poor versatility. Summary of the Invention

[0006] The present invention aims to at least partially solve one of the above-mentioned technical problems. The present invention provides an inertial force balancer and elbow structure for suppressing gap impact, which overcomes the defects of machine body vibration, noise and low slider running accuracy caused by unbalanced inertial force generated under high-speed operation of elbow press, and solves the technical problem of vibration reduction and noise reduction in high-speed operation of elbow press.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] An inertial force balancer for suppressing gap impact includes a first support member and a second support member. A first elastic member is provided between the first support member and the second support member. The first support member is provided with a second elastic member. The second elastic member can cooperate with the second support member to buffer the inertial force of the return stroke of the first elastic member. The second support member can reciprocate relative to the first support member along the extension and retraction direction of the first elastic member. The second support member is connected to a roller assembly that can rotate perpendicular to the extension and retraction direction of the first elastic member.

[0009] Furthermore, the first support member includes a base and a first support block. The first support block can be adjusted relative to the base in the extension and retraction direction of the first elastic member. The first elastic member is located between the first support block and the second support member.

[0010] Furthermore, a guide structure is provided between the base and the second support member, the guide structure being used to restrict the movement of the second support member along the extension and retraction direction of the first elastic member.

[0011] Furthermore, the guide structure includes linear guide rails located on both sides of the first support block, and the second support member includes a slider that slides in cooperation with the linear guide rails.

[0012] Furthermore, the first elastic element includes a pressure spring, and the first and second support members are provided with positioning holes that cooperate with the pressure spring.

[0013] Furthermore, the second support member includes a buffer baffle, the roller assembly and the first elastic member are located in front of the first support member, the second elastic member is located behind the first support member, and the second elastic member can contact the forward-moving buffer baffle for cushioning.

[0014] Furthermore, the second elastic member includes at least two buffer blocks located on both sides of the first elastic member, the buffer blocks being able to cooperate with the buffer baffle.

[0015] An elbow structure for suppressing gap impact includes a main link and an inertial force balancer as described in any of the above. The main link is capable of rotating and translating back and forth relative to the inertial force balancer. The main link that moves backward can roll into a roller assembly and push a second support member to move.

[0016] Furthermore, the extension and retraction direction of the first elastic element is on the same straight line as the translational direction of the main connecting rod.

[0017] Furthermore, it includes a drive rod and a bracket. One end of the drive rod is connected to a rotary drive, and the other end of the drive rod is hinged to one end of the main connecting rod. The bracket is rotatably connected to a first connecting rod that is hinged to the other end of the main connecting rod. The extension and retraction direction of the first elastic element can be collinear with the main connecting rod and the drive rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] (1) The unbalanced inertial force acts on the roller assembly, driving the roller assembly to rotate. At the same time, by pushing the second support member to move backward relative to the first support member to compress the first elastic member, it can simultaneously bear the contact force and torque. The first elastic member's recovery reaction force ensures the contact between the main connecting rod kinematic pair elements. The second elastic member and the first support member cooperate to buffer the inertial force of the first elastic member's return stroke, avoiding impact damage to the inertial force balancer components. This overcomes the problems of machine body vibration, noise, and low press slide running accuracy caused by the unbalanced inertial force generated under high-speed operation of the toggle press, and achieves the goal of vibration reduction and noise reduction of the press.

[0020] (2) Based on the simulation results of virtual prototype technology, the pressure spring used in the inertial force balancer and the installation position of the first support block on the base can be determined, and the buffer force and buffer position of the inertial force balancer can be quantitatively controlled and continuously adjusted to meet the requirements of different working conditions and improve the versatility compared with the traditional pressure spring buffer structure.

[0021] (3) The guide structure restricts the movement of the second support member along the extension and retraction direction of the first elastic member. The pressure spring is compressed by inertial force. During the return phase, the pressure spring gradually rebounds to the initial state. The second elastic member is symmetrically subjected to the buffer block, which further makes the inertial force balancer have good recoverability, reusability and good stability.

[0022] (4) The extension and retraction direction of the first elastic element is on the same straight line as the translation direction of the main connecting rod, making the force transmission more efficient and further avoiding the collapse of the inertial force balancer due to a large force perpendicular to the direction of movement of the linear guide rail. It can be used to overcome the balance of inertial force when the crank and connecting rod are collinear.

[0023] (5) The working principle is clear, the structural design is reasonable, the processing and manufacturing are simple, the process requirements are basic, and it is suitable for promotion and use. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a front view of Embodiment 1 of the present invention;

[0026] Figure 2 This is a top view of Embodiment 1 of the present invention;

[0027] Figure 3 This is a left view of Embodiment 1 of the present invention;

[0028] Figure 4 This is an exploded view of Embodiment 1 of the present invention;

[0029] Figure 5 This is a perspective view of Embodiment 2 of the present invention;

[0030] Figure 6 This is a front view of Embodiment 2 of the present invention;

[0031] Figure 7 This is a schematic diagram of the working state of Embodiment 2 of the present invention;

[0032] Figure 8 This is a schematic diagram illustrating the working principle of suppressing gap impact in Embodiment 2 of the present invention;

[0033] Figure 9 This is a comparison chart showing the simulation results of the present invention with and without an inertial force balancer.

[0034] The markings in the diagram are: 1-connecting plate, 2-rib plate, 3-base, 4-linear guide rail, 5-slider, 6-buffer baffle, 7-buffer block, 8-first support block, 9-compression spring, 10-second support block, 11-roller assembly, 12-shoulder sleeve, 13-main connecting rod, 14-first support member, 15-second support member, 16-positioning hole, 17-hole, 18-drive rod, 19-angle bracket, 20-first connecting rod, 21-second connecting rod, 22-press slider, 23-rotation drive, 24-inertia force balancer. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 invention according to the specific circumstances.

[0038] Example 1:

[0039] like Figure 1-4 As shown, this is a preferred embodiment of the inertial force balancer for suppressing gap impact according to the present invention. The inertial force balancer includes a first support member 14 and a second support member 15. A first elastic member is provided between the first support member 14 and the second support member 15. The first support member 14 is provided with a second elastic member. The second elastic member can cooperate with the second support member 15 to buffer the inertial force of the return stroke of the first elastic member. The second support member 15 can reciprocate relative to the first support member 14 along the extension and retraction direction of the first elastic member. The second support member 15 is connected to a roller group 11 that can rotate perpendicular to the extension and retraction direction of the first elastic member.

[0040] In the initial state, the first elastic element is in a free state. In the working state, the unbalanced inertial force acts on the roller assembly 11, pushing the roller assembly 11 to rotate. At the same time, it pushes the second support member 15 to move backward relative to the first support member 14, so that the first elastic element is gradually compressed to its limit position. In the return state, the roller assembly 11 is in close contact with the surface of the component acting on the unbalanced inertial force until the contact surfaces of the two separate. In the buffer state, after the contact surfaces of the two separate, the first elastic element will be stretched due to inertia. The second support member 15 moves forward relative to the first support member 14. The second elastic element and the first support member 14 cooperate to buffer the inertial force of the first elastic element during the return stroke, avoiding impact damage to the inertial force balancer component.

[0041] Furthermore, the first support member 14 includes a base 3 and a first support block 8. The first support block 8 can be adjusted in installation position relative to the base 3 along the extension and retraction direction of the first elastic member. The first elastic member is located between the first support block 8 and the second support member 15. By adjusting the installation position of the first support block 8, the compression restriction position of the first elastic member can be changed, and different compression amounts of the inertial force balancer can be adjusted to generate different buffer forces to meet different working conditions. This improves the versatility of the buffer structure compared to the traditional pressure spring 9.

[0042] Furthermore, the first support block 8 is detachably installed on the horizontal surface of the base 3 by bolts, and a number of threaded holes or oblong holes are arranged on the base 3 along the extension and retraction direction of the first elastic element. By adjusting the mating position of the bolts with the corresponding threaded holes or oblong holes, the installation position of the first support block 8 can be continuously adjusted.

[0043] Furthermore, a guide structure is provided between the base 3 and the second support member 15. The guide structure is used to restrict the movement of the second support member 15 along the extension and retraction direction of the first elastic member, thereby further realizing the stable movement of the second support member 15 along the extension and retraction direction of the first elastic member.

[0044] Furthermore, the guide structure includes linear guide rails 4 located on both sides of the first support block 8. The linear guide rails 4 are bolted to the horizontal surface of the base 3. The second support member 15 includes a slider 5 that slides with the linear guide rail 4. The slider 5 is connected to the moving part of the linear guide rail 4 by bolts. The guide is achieved simply and conveniently by moving the slider 5 along the linear guide rail 4.

[0045] Furthermore, the first elastic element includes a pressure spring 9, which can be made of OTCS material. The pressure spring 9 is parallel to the linear guide rail 4. The stiffness of the pressure spring 9 is K, the length is L, and the maximum compression is X, which facilitates the calculation of the maximum buffer force F of the inertial force balancer according to the formula F = KX. The pressure spring 9 will be compressed by the inertial force. During the return phase, the pressure spring 9 gradually rebounds to the initial state, which further makes the inertial force balancer have good recoverability and reusability.

[0046] Furthermore, the first support member 14 and the second support member 15 are provided with positioning holes 16 that cooperate with the pressure spring 9. The two ends of the pressure spring 9 are inserted into the positioning holes 16 to realize the quick installation of the pressure spring 9 on the first support member 14 and the second support member 15.

[0047] Furthermore, the slider 5 is provided with a hole 17 for a vertical pressure spring 9, and the roller assembly is installed in the hole 17 of the slider 5 through a bushing 12 composed of two bearing bushes, so as to realize the rotational installation of the roller assembly 11 perpendicular to the extension and retraction direction of the first elastic element, and further ensure the movement of the roller assembly 11 in the direction of the linear guide rail 4 and the rotation perpendicular to the direction of the linear guide rail 4.

[0048] Furthermore, the second support member 15 includes a second support block 10 connected to the sliders 5 on both sides by screws. The roller assembly 11 and the pressure spring 9 are respectively disposed in front of and behind the second support block 10. The first support block 8 and the second support block 10 are respectively provided with positioning holes 16 for installing the pressure spring 9.

[0049] Furthermore, the second support member 15 includes a buffer baffle 6, the roller assembly 11 and the first elastic member are located in front of the first support member 14, the second elastic member is located behind the first support member 14, and the second elastic member can contact the forward-moving buffer baffle 6 for cushioning.

[0050] Furthermore, the second elastic element includes at least two buffer blocks 7 located on both sides of the first elastic element. The buffer blocks 7 can cooperate with the buffer baffles 6. The two buffer baffles 6 are respectively installed on the slider 5 by bolts and are subjected to symmetrical forces. The buffer blocks 7 are made of polyurethane rubber. When the slider 5 moves forward under the force of the pressure spring 9, the buffer baffles 6 and the buffer blocks 7 come into contact and play a buffering role.

[0051] Example 2:

[0052] like Figure 5-7 As shown, this is a preferred embodiment of the elbow structure for suppressing gap impact according to the present invention. The elbow structure includes a main connecting rod 13 and an inertial force balancer as described in Embodiment 1. The main connecting rod 13 is capable of rotating and translating back and forth relative to the inertial force balancer. The main connecting rod 13 moving backward can roll and cooperate with the roller group 11 to push the second support member 15 to move.

[0053] Furthermore, the extension and retraction direction of the first elastic element is on the same straight line as the translational direction of the main connecting rod 13, making the force transmission more efficient and avoiding the inertial force balancer being subjected to a large force perpendicular to the moving direction of the linear guide rail 4.

[0054] Furthermore, the first support member 14 includes a connecting plate 1 and at least two triangular prism-shaped ribs 2. The connecting plate 1 is bolted to the frame of the toggle press and corresponds to the position of the main connecting rod 13. The ribs 2 are screwed to the vertical plane of the connecting plate 1. The base 3 is bolted to the sides of the two ribs 2, making the whole triangular prism shape, symmetrically subjected to force, and convenient for buffering the load-bearing ribs 2. After being installed on the frame of the toggle press, the inertial force balancer is at a certain angle to the vertical direction, so that the direction of the buffering force generated by the inertial force balancer when working is on the same straight line as the translational direction of the main connecting rod 13.

[0055] Furthermore, it includes a drive rod 18 and a bracket 19. One end of the drive rod 18 is connected to a rotary drive 23, and the other end of the drive rod 18 is hinged to one end of the main connecting rod 13. The bracket 19 is rotatably connected to a first connecting rod 20, which is hinged to the other end of the main connecting rod 13. The extension and retraction direction of the first elastic element can be collinear with the main connecting rod 13 and the drive rod 18, thereby making the extension and retraction direction of the first elastic element and the translational direction of the main connecting rod 13 on the same straight line. This is used to overcome the balance of inertial forces when the crank and connecting rod are collinear, and to reduce the vibration and impact of the press at high speeds. It can be used in high-speed heavy-duty servo presses.

[0056] The working principle of the above-mentioned elbow structure on the elbow-type press is as follows: Figure 7 As shown, the drive rod 18 is rotated by the rotary drive 23, which pulls or pushes the main connecting rod 13 through the hinge. The main connecting rod 13, supported by the hinged first connecting rod 20, performs a compound motion of rotation relative to the hinged position of the first connecting rod 20 and translational motion relative to the inertial force balancer. The first connecting rod 20 can adopt a V-shaped structure. The first connecting rod 20 can be hinged to the second connecting rod 21. The second connecting rod 21 is hinged to the press slide 22, which can be raised and lowered. Thus, the first connecting rod 20 pushes or pulls the second connecting rod 21, and the second connecting rod 21 pushes or pulls the press slide 22. The rise and fall of the press slide 22 drives the press to perform the pressure action.

[0057] like Figure 8 The diagram shows three operating states of the inertial force balancer. The principle by which the inertial force balancer on the above-mentioned elbow structure suppresses gap impact is as follows:

[0058] Working state a: In the initial state, the pressure spring 9 is in a free state, and the buffer baffle 6 and the buffer block 7 are not in contact. When the roller assembly 11 is subjected to inertial force due to collinearity of the toggle press, it drives the slider 5 to move on the linear guide rail 4, pushing the pressure spring 9 to compress and generate a reaction force, which is applied to the main connecting rod 13 of the press to overcome its inertial force and avoid collisions, impact noise, etc. between moving parts. At the same time, during the compression process, the main connecting rod 13 of the press has rotational motion in addition to translational motion. When the main connecting rod 13 contacts the roller assembly 11, the main connecting rod 13 will push the roller assembly 11 to rotate. Compared with the traditional pressure spring 9 buffer structure, it can withstand contact force and torque at the same time, avoid the force on the inertial force balancer in the direction perpendicular to the linear guide rail 4, and avoid the collapse of the inertial force balancer.

[0059] Working state b: The toggle press is working to its upper limit position, i.e. Figure 7 When transitioning from working state a to working state b, the pressure spring 9 of the inertial force balancer is compressed to its maximum, and the inertial force balancer enters the return phase, pushing the main connecting rod 13 of the press to ensure contact between its kinematic pair elements and avoid separation and collision of the kinematic pair elements.

[0060] Working state c: The pressure spring 9 of the inertial force balancer extends and returns to its original length. The main connecting rod 13 of the toggle press and the roller assembly 11 separate from each other at this stage. Due to inertia, the roller assembly 11 drives the slider 5 to continue sliding forward. If the inertial impact is too large, when the slider 5 moves to the limit position, the buffer baffle 6 installed on the slider 5 will contact the buffer block 7 to counteract the inertial force of the pressure spring 9, and the working state will be switched from working state b to working state c. This avoids impact damage to the components of the inertial force balancer and gradually returns to the initial state so that it can be switched back to working state a.

[0061] This process is repeated to achieve the goal of suppressing the impact of clearance in the elbow mechanism.

[0062] The effectiveness of the inertial force balancer in suppressing gap impact on the above-mentioned elbow structure was verified by simulation:

[0063] The working process of a toggle press with an inertial force balancer installed was simulated using virtual prototyping technology. The dynamic response and stress-strain analysis of the press under different stiffnesses and compression amounts of the inertial force balancer were obtained. Simulation calculations were performed on an existing toggle press with an additional inertial force balancer to analyze its dynamic response and determine the relevant parameters of the pressure spring 9: it is made of OTCS material, with a stiffness of 40 N / mm, an outer diameter of 35 mm, a bore diameter of 38 mm, a free length of 200 mm, a compression height of 120 mm, a total number of coils of 18, an effective number of coils of 16, and a compression amount of 40 mm. Based on the stiffness and maximum compression amount of the pressure spring 9 of the inertial force balancer, the maximum buffer force of the inertial force balancer was calculated. According to the formula F = KX, substituting the data K = 40 N / mm and X = 40 mm, F = 1600 N was obtained.

[0064] Conduct simulation experiments to obtain, for example Figure 9 The comparison chart shows the results of the simulation calculations. Figure 9 The middle section represents one working cycle of the toggle press. The elliptical region represents the upper limit position of the toggle press, and is also the working area of ​​the inertial force balancer. Figure 9 It can be seen that after the installation of the inertial force balancer, the peak part of the elliptical region of the force of the main connecting rod 13 is eliminated, and the buffering effect is obvious. It can overcome the defects of machine vibration, noise and low running accuracy of slider 5 caused by the unbalanced inertial force generated under high-speed operation of the toggle press, and solve the technical problem of vibration reduction and noise reduction in high-speed operation of the toggle press.

[0065] The installation and adjustment methods for the inertial force balancer on the aforementioned elbow structure include:

[0066] After determining the stiffness and compression of the pressure spring 9, a pressure spring 9 with appropriate stiffness needs to be selected. The installation position of the first support block 8 relative to the base 3 should be adjusted to keep the pressure spring 9 in a free state. Then, an inertial force balancer should be installed at a suitable position on the toggle press and a field test should be conducted. The specific effect of installing the inertial force balancer should be judged based on the noise monitoring of the press field test.

[0067] If significant separation impact noise still exists at the large end of the main connecting rod 13 during operation of the toggle press, the installation position of the first support block 8 can be appropriately moved away from the main connecting rod 13 to increase the compression of the pressure spring 9. If the separation impact noise at the large end of the main connecting rod 13 can be completely eliminated during operation of the toggle press, the installation position of the first support block 8 can be appropriately moved closer to the main connecting rod 13 to reduce the compression of the pressure spring 9, thereby adjusting the compression of the inertial force balancer. The working effect of the inertial force balancer under a smaller compression of the pressure spring can be observed. The goal is to eliminate impact noise with the smallest possible compression of the pressure spring 9, which has high versatility.

[0068] In summary, the mechanism for suppressing gap impact has a clear working principle, a reasonable structural design, simple processing and manufacturing, basic process requirements, and is suitable for widespread use.

[0069] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. An elbow structure for suppressing gap impact, characterized in that, The system includes a main connecting rod (13) and an inertial force balancer. The inertial force balancer includes a first support member (14) and a second support member (15). A first elastic member is provided between the first support member (14) and the second support member (15). The first support member (14) is provided with a second elastic member. The second elastic member can cooperate with the second support member (15) to buffer the inertial force of the return stroke of the first elastic member. The second support member (15) can reciprocate relative to the first support member (14) along the extension and retraction direction of the first elastic member. The second support member (15) is connected to a roller group (11) that can rotate perpendicular to the extension and retraction direction of the first elastic member. The second support member (15) includes a buffer baffle (6), the roller group (11) and the first elastic member are located in front of the first support member (14), and the second elastic member is located behind the first support member (14). The second elastic member can contact the forward-moving buffer baffle (6) for buffering. In the initial state, the first elastic member is in a free state, and the buffer baffle (6) does not contact the second elastic member. The main connecting rod (13) can rotate and translate back and forth relative to the inertial force balancer. The main connecting rod (13) that moves backward can roll and cooperate with the roller group (11) to push the second support member (15) to move. The extension and retraction direction of the first elastic member is on the same straight line as the translation direction of the main connecting rod (13).

2. The elbow structure for suppressing gap impact according to claim 1, characterized in that, The first support member (14) includes a base (3) and a first support block (8). The first support block (8) can be adjusted relative to the base (3) along the extension and retraction direction of the first elastic member. The first elastic member is located between the first support block (8) and the second support member (15).

3. The elbow structure for suppressing gap impact according to claim 2, characterized in that, A guide structure is provided between the base (3) and the second support member (15), and the guide structure is used to restrict the second support member (15) from moving along the extension and retraction direction of the first elastic member.

4. The elbow structure for suppressing gap impact according to claim 3, characterized in that, The guide structure includes linear guide rails (4) located on both sides of the first support block (8), and the second support member (15) includes a slider (5) that slides with the linear guide rails (4).

5. The elbow structure for suppressing gap impact according to claim 1, characterized in that, The first elastic element includes a pressure spring (9), and the first support (14) and the second support (15) are provided with positioning holes (16) that cooperate with the pressure spring (9).

6. The elbow structure for suppressing gap impact according to claim 1, characterized in that, The second elastic member includes at least two buffer blocks (7) located on both sides of the first elastic member, the buffer blocks (7) being able to cooperate with the buffer baffle (6).

7. A lever structure for suppressing gap impact according to any one of claims 1 to 6, characterized in that, It includes a drive rod (18) and a bracket (19). One end of the drive rod (18) is connected to a rotary drive (23), and the other end of the drive rod (18) is hinged to one end of the main connecting rod (13). The bracket (19) is rotatably connected to a first connecting rod (20) that is hinged to the other end of the main connecting rod (13). The extension and retraction direction of the first elastic element can be collinear with the main connecting rod (13) and the drive rod (18).

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