Buffer mechanism

Abstract

The utility model provides a buffering mechanism. The buffering mechanism comprises a positioning assembly and a buffering assembly. The positioning assembly penetrates through the buffer assembly, and the first end of the positioning assembly protrudes out of the buffer assembly; an external thread and a stop structure are sequentially arranged on the outer wall of the positioning assembly in the axial direction, and the external thread is arranged between the first end of the positioning assembly and the stop structure; an internal thread is arranged on the inner wall of the buffer assembly in the axial direction, and the internal thread is in threaded connection with the external thread; the internal thread is used for abutting against the stop structure. According to the utility model, the internal thread is abutted against the stop structure, so that the buffer assembly can be stopped, and the buffer assembly is prevented from moving to the non-threaded part of the positioning assembly, so that the internal thread is not matched with the external thread, and the buffer assembly cannot keep stable to influence the buffer effect.

Description

Technical Field

[0001] The utility model relates to the field of buffer mechanisms, in particular to a buffer mechanism. Background Art

[0002] At present, buffer mechanisms are needed in many fields to prevent workpieces from being damaged by vibration. However, most existing buffer mechanisms are designed as adjustable buffer blocks with threads, without a stop structure, and the threads may fail during use, resulting in ineffective buffering. Utility Model Content

[0003] The utility model provides a buffer mechanism to solve the problem that the existing buffer mechanism effectively plays a buffering role.

[0004] A buffer mechanism comprises a positioning component and a buffer component;

[0005] The positioning component is inserted into the buffer component, and the first end of the positioning component protrudes from the buffer component;

[0006] The outer wall of the positioning assembly is provided with an external thread and a stop structure in sequence along the axial direction, and the external thread is arranged between the first end of the positioning assembly and the stop structure;

[0007] The inner wall of the buffer assembly is provided with internal threads along the axial direction.

[0008] The internal thread is threadably connected to the external thread;

[0009] The internal thread is used for abutting against the stop structure.

[0010] Preferably, the positioning assembly includes a positioning pin, and the positioning pin is inserted into the buffer assembly;

[0011] The outer wall of the positioning pin is provided with the external thread and the stop structure in sequence along the axial direction.

[0012] Preferably, a mounting groove arranged along the axial direction is provided in the positioning pin; the positioning assembly also includes a mounting member, and the mounting member is arranged in the mounting groove.

[0013] Preferably, the mounting member comprises a main body rod arranged in the axial direction and a limiting protrusion extending radially from one end of the main body rod;

[0014] The main body rod is arranged in the installation groove, and the limiting protrusion is located outside the installation groove.

[0015] Preferably, the buffer assembly comprises an adjustable nut and a buffer block;

[0016] The adjustable nut is sleeved on the positioning assembly, and the inner wall of the adjustable nut is provided with the internal thread along the axial direction; the buffer block is sleeved on the adjustable nut.

[0017] Preferably, the adjustable nut comprises a nut body arranged in the axial direction and a fixing protrusion extending radially from an outer wall of the nut body;

[0018] The inner wall of the nut body is provided with the internal thread along the axial direction;

[0019] The buffer block comprises a buffer body arranged along the axial direction and a fixing groove arranged at a first end of the buffer body, and the fixing protrusion is clamped in the fixing groove.

[0020] Preferably, the buffer body comprises a first annular portion, a second annular portion, a third annular portion and a fourth annular portion which are sequentially arranged along the axial direction;

[0021] The inner diameter of the second annular portion is smaller than the inner diameter of the first annular portion, and the inner diameter of the second annular portion is smaller than the inner diameter of the third annular portion, so that the first annular portion, the second annular portion and the third annular portion cooperate to form the fixing groove;

[0022] The third annular portion is connected to the adjustable nut; and the fourth annular portion is connected to the positioning assembly.

[0023] Preferably, the buffer mechanism further comprises a supporting assembly, and the positioning assembly is connected to the buffer assembly;

[0024] The second end of the positioning component protrudes from the buffer component and is inserted into the supporting component.

[0025] Preferably, the support assembly comprises a support base and a positioning matching block;

[0026] The positioning and matching block is installed on the supporting base, the positioning and matching block is connected with the buffer component, and the positioning component is inserted into the positioning and matching block.

[0027] Preferably, a limiting hole is provided in the positioning matching block, and a plurality of recesses are provided on the hole wall of the limiting hole at intervals along the circumferential direction;

[0028] The positioning component is inserted into the limiting hole.

[0029] The buffer mechanism provided by the embodiment of the utility model specifically includes a positioning component and a buffer component; when installed, the positioning component is inserted into the buffer component, the first end of the positioning component protrudes from the buffer component, and is used to connect with the first workpiece, and the end of the buffer component away from the positioning component is used to connect with the second workpiece, so that the buffer component cooperates with the positioning component to form a buffer mechanism, which is placed between the first workpiece and the second workpiece, and can provide a good buffering effect. The outer wall of the positioning component is provided with an external thread and a stop structure in sequence along the axial direction, and the external thread is connected with the thread of the part installed on the positioning component, and the position of the part on the positioning component can be adjusted; the stop structure is a recessed structure, and its inner diameter is smaller than the outer diameter of the external thread, and its outer diameter is larger than the outer diameter of the external thread, and the part installed on the positioning component can be limited to prevent the part from moving to the non-threaded part of the positioning component. One end of the buffer component away from the positioning component is used to connect with the second workpiece, and the inner wall of the buffer component is provided with an internal thread along the axial direction; the internal thread and the external thread are threadedly connected in this way, and the axial position of the buffer component in the positioning component can be adjusted to ensure that the distance between the buffer mechanism and the first workpiece and the second workpiece matches; the internal thread abuts against the stop structure, and the buffer component can be stopped to prevent the buffer component from moving to the non-threaded part of the positioning component, resulting in the internal thread and the external thread no longer matching, and the buffer component cannot remain stable, affecting the buffer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is an exploded view of a buffer mechanism in one embodiment of the utility model;

[0032] Figure 2 It is an isometric view of a buffer mechanism in one embodiment of the utility model;

[0033] Figure 3 is a cross-sectional view of a buffer mechanism in one embodiment of the utility model;

[0034] Figure 4 It is an application diagram of the buffer mechanism in one embodiment of the utility model.

[0035] Among them, 1. positioning assembly; 11. positioning pin; 111. mounting groove; 12. mounting piece; 121. main rod; 122. limiting protrusion; 2. buffer assembly; 21. adjustable nut; 211. nut body; 212. fixing protrusion; 22. buffer block; 221. buffer body; 2211. first annular portion; 2212. second annular portion; 2213. third annular portion; 2214. fourth annular portion; 222. fixing groove; 3. external thread; 4. stopping structure; 5. internal thread; 6. support assembly; 61. support base; 62. positioning matching block; 621. limiting hole; 622. depression. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The utility model embodiment provides a buffer mechanism, referring to Figure 1-4The buffer mechanism includes a positioning component 1 and a buffer component 2; the positioning component 1 is inserted into the buffer component 2, and the first end of the positioning component 1 protrudes from the buffer component 2; the outer wall of the positioning component 1 is provided with an external thread 3 and a stop structure 4 in sequence along the axial direction, and the external thread 3 is arranged between the first end of the positioning component 1 and the stop structure 4; the inner wall of the buffer component 2 is provided with an internal thread 5 along the axial direction, and the internal thread 5 is threadedly connected with the external thread 3; the internal thread 5 is used to abut against the stop structure 4.

[0040] As an example, the buffer mechanism can be used in multiple fields, such as the field of mechanical manufacturing, and is placed between two workpieces to play a buffering and protective role to prevent the workpieces from being damaged. The buffer mechanism specifically includes a positioning component 1 and a buffer component 2; when installed, the positioning component 1 is inserted into the buffer component 2, and the first end of the positioning component 1 protrudes from the buffer component 2, which is used to connect with the first workpiece, and the end of the buffer component 2 away from the positioning component 1 is used to connect with the second workpiece, so that the buffer component 2 cooperates with the positioning component 1 to form a buffer mechanism, which is placed between the first workpiece and the second workpiece, and can provide a good buffering effect. The outer wall of the positioning component 1 is provided with an external thread 3 and a stop structure 4 in sequence along the axial direction. The external thread 3 is connected to the thread of the part installed on the positioning component 1, and the position of the part on the positioning component 1 can be adjusted; the stop structure 4 is a recessed area, and its inner diameter is smaller than the outer diameter of the external thread 3, and its outer diameter is larger than the outer diameter of the external thread 3, which can limit the part installed on the positioning component 1 to prevent the part from moving to the non-threaded part of the positioning component 1. The end of the buffer component 2 away from the positioning component 1 is used to connect with the second workpiece, and the inner wall of the buffer component 2 is provided with an internal thread 5 along the axial direction; the internal thread 5 is threadedly connected with the external thread 3 in this way, and the axial position of the buffer component 2 in the positioning component 1 can be adjusted to ensure that the distance between the buffer mechanism and the first workpiece and the second workpiece matches; the internal thread 5 is used to abut against the stopping structure 4, which can stop the buffer component 2 and prevent the buffer component 2 from moving to the non-threaded part of the positioning component 1, causing the internal thread 5 and the external thread 3 to no longer match, and the buffer component 2 cannot remain stable, affecting the buffering effect.

[0041] In one embodiment, referring to Figure 1 and Figure 3 The positioning assembly 1 includes a positioning pin 11, which is inserted into the buffer assembly 2; the outer wall of the positioning pin 11 is provided with an external thread 3 and a stop structure 4 in sequence along the axial direction.

[0042] As an example, the positioning assembly 1 includes a positioning pin 11. When installed, the first end of the positioning pin 11 is used to connect with the first workpiece. The positioning pin 11 is inserted into the buffer assembly 2. The second end of the buffer assembly 2 or the positioning pin 11 protrudes from the part of the buffer assembly 2 and is used to connect with the second workpiece. In this way, the buffer assembly 2 cooperates with the positioning pin 11 to form a buffer mechanism, which is placed between the first workpiece and the second workpiece and can provide a good buffering effect. An external thread 3 and a stop structure 4 are sequentially arranged axially on the outer wall of the positioning pin 11. In this way, the buffer assembly 2 cooperates with the external thread 3 to adjust the axial position of the buffer assembly 2 on the positioning pin 11; the buffer assembly 2 cooperates with the stop structure 4 to stop the buffer assembly 2 to prevent the buffer assembly 2 from moving to the non-threaded part of the positioning assembly 1, resulting in the internal thread 5 and the external thread 3 no longer matching, and the buffer assembly 2 cannot remain stable, affecting the buffering effect.

[0043] In one embodiment, referring to Figure 1 and Figure 3 The positioning pin 11 is provided with a mounting groove 111 arranged along the axial direction; the positioning assembly 1 also includes a mounting member 12, and the mounting member 12 is arranged in the mounting groove 111.

[0044] As an example, the positioning assembly 1 also includes a mounting member 12; during installation, a mounting groove 111 is provided in the positioning pin 11, and the mounting groove 111 is arranged along the axial direction of the positioning pin 11. The mounting member 12 is set in the mounting groove 111, and the mounting member 12 is used to connect the first workpiece. The mounting member 12 whose length is closest to the distance between the first workpiece and the second workpiece can be replaced according to actual conditions, so that the buffer mechanism can be accurately installed between the first workpiece and the second workpiece to play an effective buffering role.

[0045] In one embodiment, referring to Figure 1 and Figure 3 The mounting member 12 includes a main rod 121 arranged along the axial direction and a limiting protrusion 122 extending radially from one end of the main rod 121 ; the main rod 121 is arranged in the mounting groove 111 , and the limiting protrusion 122 is located outside the mounting groove 111 .

[0046] As an example, the mounting member 12 includes a main rod 121 and a limiting protrusion 122; the main rod 121 is arranged axially, and the limiting protrusion 122 extends radially from one end of the main rod 121; during installation, the main rod 121 is arranged in the mounting groove 111, and the limiting protrusion 122 is located outside the mounting groove 111, which is used to connect with the first workpiece, so as to facilitate matching the buffer mechanism with the first workpiece.

[0047] In one embodiment, referring to Figure 1 and Figure 3The buffer assembly 2 includes an adjustable nut 21 and a buffer block 22 ; the adjustable nut 21 is sleeved on the positioning assembly 1 , and the inner wall of the adjustable nut 21 is provided with an internal thread 5 along the axial direction; the buffer block 22 is sleeved on the adjustable nut 21 .

[0048] As an example, the buffer assembly 2 includes an adjustable nut 21 and a buffer block 22; during installation, the adjustable nut 21 is mounted on the positioning assembly 1, an internal thread 5 is set on the inner wall of the adjustable nut 21, and then the buffer block 22 is mounted on the adjustable nut 21. The internal thread 5 is arranged in this way to cooperate with the external thread 3 of the positioning assembly 1, and the axial position of the adjustable nut 21 in the positioning assembly 1 can be adjusted to adjust the position of the buffer block 22 and ensure that the distance between the buffer mechanism and the first workpiece and the second workpiece is adapted.

[0049] In one embodiment, referring to Figure 1 and Figure 2 The adjustable nut 21 includes a nut body 211 arranged along the axial direction and a fixing protrusion 212 extending radially from the outer wall of the nut body 211; the inner wall of the nut body 211 is provided with an internal thread 5 along the axial direction; the buffer block 22 includes a buffer body 221 arranged along the axial direction and a fixing groove 222 arranged at the first end of the buffer body 221, and the fixing protrusion 212 is clamped in the fixing groove 222.

[0050] As an example, the adjustable nut 21 includes a nut body 211 and a fixing protrusion 212; the nut body 211 is arranged along the axial direction, and the fixing protrusion 212 is radially extended from the outer wall of the nut body 211; during installation, an internal thread 5 is arranged along the axial direction on the inner wall of the nut body 211, and the internal thread 5 is arranged in this way to cooperate with the external thread 3 of the positioning assembly 1, so that the axial position of the adjustable nut 21 in the positioning assembly 1 can be adjusted. The buffer block 22 includes a buffer body 221 and a fixing groove 222, the buffer body 221 is arranged along the axial direction, the fixing groove 222 is arranged at the first end of the buffer body 221, and the fixing protrusion 212 is clamped in the fixing groove 222, so that it is convenient to install the buffer block 22 on the adjustable nut 21, and it is convenient to install and disassemble the buffer block 22.

[0051] In one embodiment, referring to Figure 3 The buffer body 221 includes a first annular portion 2211, a second annular portion 2212, a third annular portion 2213 and a fourth annular portion 2214 which are arranged in sequence along the axial direction; the inner diameter of the second annular portion 2212 is smaller than the inner diameter of the first annular portion 2211, and the inner diameter of the second annular portion 2212 is smaller than the inner diameter of the third annular portion 2213, so that the first annular portion 2211, the second annular portion 2212 and the third annular portion 2213 cooperate to form a fixing groove 222; the third annular portion 2213 is connected to the adjustable nut 21; the fourth annular portion 2214 is connected to the positioning assembly 1.

[0052] As an example, the buffer body 221 includes a first annular portion 2211, a second annular portion 2212, a third annular portion 2213 and a fourth annular portion 2214 arranged in sequence along the axial direction; the inner diameter of the second annular portion 2212 is smaller than the inner diameter of the first annular portion 2211, and the inner diameter of the second annular portion 2212 is smaller than the inner diameter of the third annular portion 2213, so that the first annular portion 2211, the second annular portion 2212 and the third annular portion 2213 can cooperate to form a fixed groove 222; the fixed protrusion 212 is clamped in the fixed groove 222, and the third annular portion 2213 is connected to the adjustable nut 21, so that it is convenient to install the buffer block 22 on the adjustable nut 21, and to install and disassemble the buffer block 22. The fourth annular portion 2214 is connected to the positioning assembly 1 to provide a guide for the buffer block 22 to move along the axial direction of the positioning assembly 1.

[0053] In one embodiment, referring to Figure 1-4 The buffer mechanism also includes a support component 6, which is connected to the buffer component 2; the second end of the positioning component 1 protrudes from the buffer component 2 and is inserted into the support component 6.

[0054] As an example, the buffer mechanism also includes a support component 6; during installation, the support component 6 is installed on the second workpiece, and the support component 6 is connected to the buffer component 2 to provide support for the buffer component 2; the second end of the positioning component 1 protrudes from the buffer component 2 and is inserted into the support component 6. This arrangement provides positioning support for the positioning component 1 through the support component 6, and also provides limiting effects in other directions for the positioning component 1 to prevent the buffer mechanism from shaking and affecting the buffering effect.

[0055] In one embodiment, referring to Figure 1-4 The support assembly 6 includes a support base 61 and a positioning matching block 62; the positioning matching block 62 is installed on the support base 61, and the positioning matching block 62 is connected to the buffer assembly 2; the positioning assembly 1 is inserted into the positioning matching block 62.

[0056] As an example, the support assembly 6 includes a support base 61 and a positioning matching block 62; during installation, the support base 61 is installed on the second workpiece, the positioning matching block 62 is installed on the support base 61, the positioning matching block 62 is connected to the buffer assembly 2, and the positioning assembly 1 is inserted into the positioning matching block 62. In this way, the support base 61 and the positioning matching block 62 provide positioning support for the buffer assembly 2 and the positioning assembly 1, and the positioning matching block 62 can provide a limiting effect in other directions for the positioning assembly 1 to prevent the buffer mechanism from shaking and affecting the buffering effect.

[0057] In the buffer mechanism of this example, the positioning pin 11, the mounting member 12, the adjustable nut 21 and the buffer block 22 cooperate to form a limiting convex block, and the support base 61 and the positioning matching block 62 cooperate to form a limiting concave block. The positioning pin 11 and the mounting member 12 are assembled into a positioning assembly 1, i.e., a first sub-assembly (or a positioning pin 11 with a mounting structure alone), and the adjustable nut 21 and the buffer block 22 are assembled into a buffer assembly 2, i.e., a second sub-assembly. The first sub-assembly can slide up and down in the non-threaded part inside the second sub-assembly. During installation, the support base 61 is first pre-tightened and installed on the second workpiece through the fasteners (i.e. bolts) and the through holes of the support base 61. When the closing limit protrusion and the limit concave block are fitted to the designed position, the first sub-assembly realizes the positioning of the buffer block 22 through the interference fit between the buffer block 22 and the positioning pin 11. After the limit protrusion is opened, the second sub-assembly is rotated about 90 degrees, and the buffer block 22 is fixed through the cooperation of the external thread 3 and the stop structure 4 of the local outside of the positioning pin 11 and the internal thread 5 of the adjustable nut 21; at the same time, the positioning pin 11 and the pre-tightened positioning matching block 62 realize the limiting effect, that is, the adaptive adjustment of the buffer mechanism is completed. The buffer mechanism of this example is simple to install, and can always maintain the requirement of consistent compression between the buffer block 22 and the positioning matching block 62, which can avoid the conventional buffer block 22 from having a gap or over-compression, effectively solve the problem of abnormal noise and jitter, and has high assembly efficiency and is completed in one time; and in addition to the axial buffering effect, the buffer block 22 also has a limiting effect in other directions to prevent the parts from jittering.

[0058] In one embodiment, referring to Figure 1 A limiting hole 621 is provided in the positioning matching block 62 , and a plurality of recesses 622 are provided at intervals along the circumferential direction on the hole wall of the limiting hole 621 ; the positioning component 1 is passed through the limiting hole 621 .

[0059] As an example, a limiting hole 621 is provided in the positioning fitting block 62, and the positioning component 1 is inserted into the limiting hole 621, so that the positioning component 1 can be limited in directions other than the axial direction; a plurality of recesses 622 are provided on the hole wall of the limiting hole 621 at circumferential intervals, and the plurality of recesses 622 can reduce the contact area between the positioning component 1 and the hole wall of the limiting hole 621, so as to reduce the friction between the positioning component 1 and the positioning fitting block 62, thereby facilitating the adjustment of the position of the positioning component 1 in the positioning fitting block 62.

[0060] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A buffer mechanism, characterized in that: Including a positioning component and a buffer component; The positioning component is inserted into the buffer component, and the first end of the positioning component protrudes from the buffer component; The outer wall of the positioning assembly is provided with an external thread and a stop structure in sequence along the axial direction, and the external thread is arranged between the first end of the positioning assembly and the stop structure; The inner wall of the buffer assembly is provided with an internal thread along the axial direction, and the internal thread is threadably connected to the external thread; the internal thread is used to abut against the stop structure.

2. The buffer mechanism according to claim 1, characterized in that: The positioning assembly includes a positioning pin, and the positioning pin is inserted into the buffer assembly; The outer wall of the positioning pin is provided with the external thread and the stop structure in sequence along the axial direction.

3. The buffer mechanism according to claim 2, characterized in that: The positioning pin is provided with a mounting groove arranged along the axial direction; the positioning assembly also includes a mounting piece, and the mounting piece is arranged in the mounting groove.

4. The buffer mechanism according to claim 3, characterized in that: The mounting member comprises a main body rod arranged in the axial direction and a limiting protrusion extending radially from one end of the main body rod; The main body rod is arranged in the installation groove, and the limiting protrusion is located outside the installation groove.

5. The buffer mechanism according to claim 1, characterized in that: The buffer assembly includes an adjustable nut and a buffer block; The adjustable nut is sleeved on the positioning assembly, and the inner wall of the adjustable nut is provided with the internal thread along the axial direction; the buffer block is sleeved on the adjustable nut.

6. The buffer mechanism according to claim 5, characterized in that: The adjustable nut comprises a nut body arranged in the axial direction and a fixing protrusion extending radially from the outer wall of the nut body; The inner wall of the nut body is provided with the internal thread along the axial direction; The buffer block comprises a buffer body arranged along the axial direction and a fixing groove arranged at a first end of the buffer body, and the fixing protrusion is clamped in the fixing groove.

7. The buffer mechanism according to claim 6, characterized in that: The buffer body comprises a first annular portion, a second annular portion, a third annular portion and a fourth annular portion arranged in sequence along the axial direction; The inner diameter of the second annular portion is smaller than the inner diameter of the first annular portion, and the inner diameter of the second annular portion is smaller than the inner diameter of the third annular portion, so that the first annular portion, the second annular portion and the third annular portion cooperate to form the fixing groove; The third annular portion is connected to the adjustable nut; and the fourth annular portion is connected to the positioning assembly.

8. The buffer mechanism according to claim 1, characterized in that: The buffer mechanism further comprises a supporting assembly, and the positioning assembly is connected to the buffer assembly; The second end of the positioning component protrudes from the buffer component and is inserted into the supporting component.

9. The buffer mechanism according to claim 8, characterized in that: The support assembly includes a support base and a positioning matching block; The positioning and matching block is installed on the supporting base, the positioning and matching block is connected with the buffer component, and the positioning component is inserted into the positioning and matching block.

10. The buffer mechanism according to claim 9, characterized in that: A limiting hole is provided in the positioning matching block, and a plurality of recesses are provided on the hole wall of the limiting hole at intervals along the circumferential direction; The positioning component is inserted into the limiting hole.

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