Chain tool apron structure and chain mechanism for horizontal tool magazine

Abstract

The invention relates to the technical field of tool sleeve chain structures, in particular to a chain tool apron structure and a chain mechanism for a horizontal tool magazine. The cutter claws are used for fixing cutters; the two first single-rod bearings are used for respectively connecting the upper overlapping parts and the lower overlapping parts of the first connecting part and the second connecting part which are overlapped; the driving structure is used for adjusting the axial distance between the two first single-rod bearings; the two second single-rod bearings correspond to the two first single-rod bearings, and the second single-rod bearings are perpendicular to the axes of the first single-rod bearings; the two sets of first single-rod bearings on the same chain base body are in rolling contact with the inner side wall of the guide rail, and the two second single-rod bearings are in rolling contact with the top face and the bottom face of the guide rail correspondingly. Through the arrangement of the two first single-rod bearings and the driving structure, the field assembly efficiency is improved, gaps caused by machining errors are effectively reduced, transmission noise is lowered, and the stability of a tool changing plane is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tool holder chain structures, and in particular to a chain tool seat structure and a chain mechanism for a horizontal tool magazine. Background Art

[0002] A chain-type tool magazine is a type of tool magazine with a large tool capacity in a numerically controlled machine tool, and the movement of the tool is achieved through the movement of a chain.

[0003] The existing chain structure is composed of several chain links. A plurality of first connection components on each chain link are respectively and successively hinged head to tail with a plurality of second connection components through a rotating shaft assembly, and bearings are installed at both ends of the connection shaft, and a circlip is used to limit the bearing, so as to realize the transmission and guidance of the chain.

[0004] However, the chain generally needs to be assembled on site, and the assembly of the connection shaft and the bearing involves many components, resulting in a complex assembly process and affecting the overall assembly efficiency; moreover, the machining error of the position of the circlip groove on the connection shaft causes a small distance between the bearing and the connection seat, resulting in transmission noise during the operation of the chain, affecting the operation experience of the equipment. In addition, the gap will also affect the stability of the tool change plane and is not conducive to the precise positioning of the tool. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to provide a chain tool seat structure and a chain mechanism for a horizontal tool magazine, which effectively solve the problems in the background art.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: a chain tool seat structure, including: A chain seat body, having a first connection portion and a second connection portion; A tool claw, arranged on the outer side surface of the chain seat body for fixing a tool; Two first single-rod bearings, which respectively connect the upper overlapping portion and the lower overlapping portion of the overlapped first connection portion and the second connection portion; A driving structure for adjusting the axial distance between the two first single-rod bearings; Two second single-rod bearings, arranged on the inner side surface of the chain seat body and corresponding to the two first single-rod bearings, and the second single-rod bearings are arranged perpendicular to the axis of the first single-rod bearings; Two groups of the first single-rod bearings on the same chain seat body are in rolling contact with the inner side wall of the guide rail, and the two second single-rod bearings are respectively in rolling contact with the top surface and the bottom surface of the guide rail.

[0007] Further, both the first connection portion and the second connection portion include two connecting plates; The two connecting plates of the second connecting portion and the two connecting plates of the first connecting portion form a multi-layer overlapping structure.

[0008] Further, the two connecting plates of the second connecting portion are disposed between the two connecting plates of the first connecting portion; A plurality of spring plungers are uniformly arranged along the circumference of the hinge shaft on the opposite surfaces of the two connecting plates of the first connecting portion.

[0009] Further, a compensation drive disk is provided on the two connecting plates of the first connecting portion. The compensation drive disk is provided with at least three adjusting rods uniformly arranged along the circumferential direction, and the spring plunger is installed in the adjusting rod; A groove is provided on the surface of the connecting plate away from the second connecting portion. The thickness of the compensation drive disk is less than the depth of the groove, and a spring is provided on the shaft section of the adjusting rod located in the groove; By adding a gasket on the compensation drive disk, the compensation drive disk is driven to move axially along the first single-rod bearing in the groove, so that the spring plunger at the end of the adjusting rod passes through the connecting plate and floats against the second connecting portion.

[0010] Further, the driving structure includes a receiving cavity provided at the central position of the end of the first single-rod bearing passing through the lower overlapping portion or the upper overlapping portion, and a piston rod provided at the end of the first single-rod bearing passing through the upper overlapping portion or the lower overlapping portion; The piston rod is embedded in the receiving cavity, and at least one ventilation hole is provided on the side wall of the receiving cavity, and the ventilation hole is communicated with the receiving cavity.

[0011] Further, the driving structure: A first sleeve is located between the upper overlapping portion and the lower overlapping portion, and the edges of both ends thereof extend towards the center of the circle to form convex edges; An annular clamping groove is located at the end of the rod body of the first single-rod bearing for receiving the convex edge; Wherein, a seam is provided axially on the side wall of the first sleeve, the spacing of the seam is less than the diameter of the rod body of the first single-rod bearing, and the first sleeve is made of a shape memory alloy. After deformation, the first sleeve makes the two first single-rod bearings approach each other axially.

[0012] Further, the driving structure includes: A second sleeve, both ends of which respectively penetrate through the upper overlapping portion and the lower overlapping portion; A driving groove is provided on the outer cylindrical surface of the rod body of the first single-rod bearing; A driving pin is screwed on the side wall of the second sleeve, and the end of the driving pin extending into the second sleeve abuts against the driving groove; Wherein, the bottom of the driving groove is inclined along the axial direction of the second sleeve and gradually approaches the axis towards the upper overlapping part or the lower overlapping part. The axial displacement generated by rotating the driving pin is used to drive the first single-rod bearing to move axially.

[0013] Further, both the first single-rod bearing and the second single-rod bearing include a support rod and a bearing provided at the end of the support rod. One end of the support rod is provided with a limiting disk, and the other end passes through the upper overlapping part or the lower overlapping part and is connected to the driving structure.

[0014] Further, positioning arc grooves are provided at both the top and bottom of the chain seat body, and the rod part of the second single-rod bearing is embedded in the positioning arc grooves. An arch-shaped centering seat is provided at one end of the positioning arc groove close to the inner side. The semi-circular hole of the centering seat and the positioning arc groove form a centering hole. The centering hole and the rod of the second single-rod bearing are in transitional fit. One end of the rod of the second single-rod bearing extending out of the centering seat is fixed in the positioning arc groove by a screw.

[0015] The present invention also provides a chain mechanism for a horizontal tool magazine, including the chain tool seat structure as described above.

[0016] The beneficial effects of the present invention are as follows: The present invention simplifies the assembly structure through two first single-rod bearings, reduces the number of components for on-site assembly, thereby improving the assembly efficiency. During the assembly process, the driving structure is used to pull the ends of the two first single-rod bearings axially, which can effectively reduce the gap caused by machining errors and improve the assembly accuracy, thereby reducing the transmission noise; through the contact between two groups of first single-rod bearings and the inner side wall of the guide rail, and between two second single-rod bearings and the top and bottom surfaces of the guide rail, multi-directional guiding surfaces are formed, enhancing the stability and guiding accuracy of the chain, and being beneficial to improving the stability of the tool change plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the chain tool seat structure in the embodiment of the present invention; Figure 2 It is a schematic diagram of the series connection of two chain tool seat structures in the embodiment of the present invention; Figure 3Schematic cross-sectional view of the chain cutter seat structure and the guide rail in the embodiment of the present invention; Figure 4 Schematic diagram of the floating support of the spring plunger for the second connecting part in the embodiment of the present invention; Figure 5 Schematic diagram of the compensation process of the compensation drive disk in the embodiment of the present invention; Figure 6 Top view of two series-connected chain cutter seat structures in the embodiment of the present invention; Figure 7 is Figure 6 A-A cross-sectional view of; Figure 8 is Figure 6 B-B cross-sectional view and partial enlarged view of; Figure 9 Schematic diagram of the connection structure of the first sleeve in the embodiment of the present invention; Figure 10 Schematic diagram of the first deformation structure of the first sleeve in the embodiment of the present invention; Figure 11 Schematic diagram of the second deformation structure of the first sleeve in the embodiment of the present invention; Figure 12 Schematic diagram of the connection structure between the second sleeve and the drive pin in the embodiment of the present invention; Figure 13 is Figure 12 Partial enlarged view at C of; Figure 14 Schematic diagram of the installation structure of the second single-rod bearing on the chain seat body in the embodiment of the present invention.

[0019] Reference numerals: 1. Chain seat body; 11. First connecting part; 12. Second connecting part; 13. Positioning arc groove; 14. Centering seat; 1a. Centering hole; 15. Screw; 2. Knife claw; 3. Connecting component; 31. First single-rod bearing; 32. Driving structure; 32a. Accommodating cavity; 32b. Piston rod; 32c. Vent hole; 32d. First sleeve; 32e. Annular clamping groove; 32f. Second sleeve; 32g. Driving groove; 32h. Drive pin; 4. Second single-rod bearing; 5. Spring plunger; 6. Compensation drive disk; 7. Adjusting rod; 8. Spring; 9. Gasket. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of this invention are only for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0023] As Figures 1 to 14 shown in the chain cutter seat structure, it includes: a chain seat body 1, cutter claws 2, two first single-rod bearings 31, a driving structure 32 and two second single-rod bearings 4; The chain seat body 1 has a first connecting portion 11 and a second connecting portion 12; The cutter claws 2 are arranged on the outer side surface of the chain seat body 1 and are used to fix the cutting tool; Two first single-rod bearings 31 connect the upper overlapping portion and the lower overlapping portion of the overlapped first connecting portion 11 and second connecting portion 12 respectively; The driving structure 32 is used to adjust the axial distance between the two first single-rod bearings 31; Two second single-rod bearings 4 are arranged on the inner side surface of the chain seat body 1 and correspond to the two first single-rod bearings 31. The second single-rod bearings 4 are arranged perpendicular to the axis of the first single-rod bearings 31; Two sets of first single-rod bearings 31 on the same chain seat body 1 are in rolling contact with the inner side wall of the guide rail, and the two second single-rod bearings 4 are in rolling contact with the top surface and the bottom surface of the guide rail respectively.

[0024] When assembling the chain, fix the cutter claw 2 on the outer side of the chain seat body 1 to ensure the accurate position of the cutter claw 2 and check the firmness of its connection with the chain seat body 1; overlap the first connection part 11 of one chain seat body 1 with the second connection part 12 of another chain seat body 1. At this time, the mounting holes on the first connection part 11 and the second connection part 12 are in an aligned state; install the rod bodies of the two first single-rod bearings 31 into the upper overlapping part and the lower overlapping part of the first connection part 11 and the second connection part 12 respectively to ensure that the bearings are installed in place and can rotate freely; place the driving structure 32 between the upper overlapping part and the lower overlapping part to axially pull the ends of the two first single-rod bearings 31 to ensure that there is no gap between the bearings and the chain seat body 1; install the two second single-rod bearings 4 on the inner side of the chain seat body 1 to ensure that they correspond to the first single-rod bearings 31 and are perpendicular to the axis of the first single-rod bearings 31, and check the installation position and rotational flexibility of the bearings; finally, fit the assembled chain seat body 1 with the guide rail to ensure that the two groups of first single-rod bearings 31 are in rolling contact with the inner side wall of the guide rail, and the two second single-rod bearings 4 are in rolling contact with the top surface and the bottom surface of the guide rail respectively, avoiding local over-tightness or over-looseness, ensuring the smooth movement and noiselessness of the chain, and ensuring that the stability of the tool change plane meets the requirements.

[0025] Through the two first single-rod bearings 31, the assembly structure is simplified, the number of components for on-site assembly is reduced, thereby improving the assembly efficiency. During the assembly process, the driving structure 32 is used to axially pull the ends of the two first single-rod bearings 31, which can effectively reduce the gap caused by machining errors, improve the assembly accuracy, and thus reduce the transmission noise; through the contact between the two groups of first single-rod bearings 31 and the inner side wall of the guide rail, and the two second single-rod bearings 4 and the top surface and the bottom surface of the guide rail, a multi-directional guiding surface is formed, enhancing the stability and guiding accuracy of the chain, which is beneficial to improving the stability of the tool change plane.

[0026] In the present invention, both the first connection part 11 and the second connection part 12 include two connecting plates; the two connecting plates of the second connection part 12 and the two connecting plates of the first connection part 11 form a multi-layer overlapping structure, which can effectively disperse the torsional load during the movement of the chain, improve the anti-torsion performance of the overall structure, and the multi-layer connecting plates are overlapped, avoiding the vertical movement of the chain seat body 1, effectively preventing the clamping plane of the clamping jaw from tilting, and thus ensuring the tool change accuracy and stability. In addition, the design of the multi-layer connecting plates can adjust the thickness and number of the connecting plates according to actual needs to adapt to different working conditions and load requirements.

[0027] On the basis of the above solution, the two connecting plates of the second connecting portion 12 are placed between the two connecting plates of the first connecting portion 11; a plurality of spring plungers 5 are evenly distributed along the circumference of the hinge shaft on the opposite surfaces of the two connecting plates of the first connecting portion 11. The elastic restoring force of the spring plunger 5 automatically compensates for the tiny gap between the first connecting portion 11 and the second connecting portion 12, forming a floating support for the second connecting portion 12, ensuring a stable positional relationship of the second connecting portion 12 during movement, significantly improving the stability of the tool change plane and the tool positioning accuracy. In addition, through the buffering effect of the spring plunger 5, the vibration and impact during the movement of the chain can be significantly reduced, improving the smoothness of the movement. Moreover, the floating support structure can adapt to the tiny dimensional errors between the first connecting portion 11 and the second connecting portion 12, reducing the requirements for machining accuracy, and improving the assembly efficiency and fault tolerance.

[0028] As Figure 5 shown, when the distance between the first connecting portion 11 and the second connecting portion 12 exceeds the floating range of the spring plunger 5, in order to effectively compensate for the larger gap, preferably, a compensation drive disk 6 is provided on the two connecting plates of the first connecting portion 11. At least three adjusting rods 7 are evenly distributed along the circumferential direction of the compensation drive disk 6, and the spring plunger 5 is installed in the adjusting rod 7; a groove is provided on the surface of the connecting plate away from the second connecting portion 12. The thickness of the compensation drive disk 6 is less than the depth of the groove. A spring 8 is provided on the shaft section of the adjusting rod 7 located in the groove; by adding a gasket 9 on the compensation drive disk 6, the compensation drive disk 6 is driven to move axially in the groove along the first single-rod bearing 31, so that the spring plunger 5 at the end of the adjusting rod 7 passes through the connecting plate and floats against the second connecting portion 12.

[0029] Specifically, in the initial state, when the bearing surface of the first single-rod bearing 31 contacts the first connecting portion 11, the compensation drive disk 6 is flush with the outer side surface of the first connecting portion 11, and the end surface of the adjusting rod 7 is flush with the inner side surface of the first connecting portion 11; during the installation process, by adding a gasket 9 on the compensation drive disk 6 and pressing down the compensation drive disk 6, the thickness of the gasket 9 can be adjusted according to actual needs, thereby controlling the axial movement distance of the compensation drive disk 6; as the compensation drive disk 6 moves downward, an auxiliary positioning surface of the first connecting portion 11 will be formed at the end surfaces of the three adjusting rods 7. The auxiliary positioning surface realizes the preliminary compensation for the large gap. At the same time, the spring plunger 5 is used to provide additional floating support, further enhancing the flexibility and stability of the compensation. By adjusting the thickness of the gasket 9, a large-amplitude axial movement can be achieved. This design enables the compensation drive disk 6 to adapt to large gap changes, thus effectively solving the compensation problem for the large gap between the first connecting portion 11 and the second connecting portion 12.

[0030] In a preferred embodiment of the present invention, the driving structure 32 includes a receiving cavity 32a provided at the central position of the end of the first single-rod bearing 31 passing through the lower overlapping portion or the upper overlapping portion, and a piston rod 32b provided at the end of the first single-rod bearing 31 passing through the upper overlapping portion or the lower overlapping portion; the piston rod 32b is inserted into the receiving cavity 32a, and at least one vent hole 32c is provided on the side wall of the receiving cavity 32a, and the vent hole 32c communicates with the receiving cavity 32a.

[0031] Specifically, the diameter of the piston rod 32b is smaller than the rod body diameter of the first single-rod bearing 31, and the depth of the receiving cavity 32a is greater than the length of the piston rod 32b. When the piston rod 32b is inserted into the receiving cavity 32a, the piston rod 32b and the sliding side wall of the receiving cavity 32a are sealed by a sealing ring. As the piston rod 32b continuously enters, the gas in the receiving cavity 32a is compressed and discharged through the vent hole 32c; when the two first single-rod bearings 31 are installed in place, the root end face of the piston rod 32b does not contact the inlet end face of the receiving cavity 32a. At this time, the vent hole 32c is blocked by a plug, and the receiving cavity 32a is in a vacuum state, and the two single-rod bearings are held in the installation position by vacuum suction.

[0032] In another preferred embodiment, the driving structure 32 includes a first sleeve 32d and an annular groove 32e; the first sleeve 32d is located between the upper overlapping portion and the lower overlapping portion, and the edges of its two ends extend towards the center of the circle to form convex edges; the annular groove 32e is located at the end of the rod body of the first single-rod bearing 31 for receiving the convex edges; Among them, an axial seam is provided on the side wall of the first sleeve 32d, the spacing of the seam is smaller than the rod body diameter of the first single-rod bearing 31, and the first sleeve 32d is made of a shape memory alloy. The deformed first sleeve 32d makes the two first single-rod bearings 31 approach each other axially.

[0033] In the initial state, during assembly, the clamping edge is inserted into the annular groove 32e by using the seam. At this time, the two first single-rod bearings 31 achieve axial limit, and the seam helps the first sleeve 32d to be inserted into the annular groove 32e of the two first single-rod bearings 31 from the side; during the movement of the chain, the shape memory alloy will deform under the influence of friction. The deformed first sleeve 32d can automatically adjust its shape to make the seam spacing smaller, and an inner concave or outer convex arc is formed in the middle position, shortening the axial distance of the two clamping edges.

[0034] As Figures 12 - 13 shown, the driving structure 32 includes a second sleeve 32f, a driving groove 32g and a driving pin 32h. The two ends of the second sleeve 32f respectively penetrate through the upper overlapping portion and the lower overlapping portion; the driving groove 32g is provided on the outer cylindrical surface of the rod body of the first single-rod bearing 31; the driving pin 32h is screwed on the side wall of the second sleeve 32f, and the end extending into the second sleeve 32f abuts against the driving groove 32g; Among them, the bottom of the driving groove 32g is inclined along the axial direction of the second sleeve 32f, and gradually approaches the axis towards the upper overlapping part or the lower overlapping part. The axial displacement generated by rotating the driving pin 32h drives the first single-rod bearing 31 to move axially.

[0035] Through the cooperation of the driving groove 32g and the driving pin 32h, the rotation of the driving pin 32h can be accurately converted into the axial displacement of the first single-rod bearing 31, thereby realizing high-precision position adjustment. During the installation process, only the driving pin 32h needs to be rotated, without disassembling other components or using complex tools, improving the assembly and maintenance efficiency. In addition, by precisely controlling the axial displacement, it is ensured that the axial displacement of the first single-rod bearing 31 is stable and controllable, effectively avoiding loosening or offset caused by improper adjustment. This design not only reduces vibration and impact during the chain movement, but also further improves the stability and reliability of the overall structure.

[0036] In addition, in addition to the above several structures, during the assembly process, connection can also be carried out through a threaded structure. Specifically, the driving structure 32 is threadedly connected to the rod body part of the first single-rod bearing 31; the thread directions of the threaded sections at both ends of the driving structure 32 are opposite.

[0037] In a preferred embodiment of the present invention, both the first single-rod bearing 31 and the second single-rod bearing 4 include a support rod and a bearing provided at the end of the support rod; a limiting disk is provided at one end of the support rod, and the other end passes through the upper overlapping part or the lower overlapping part and is connected to the driving structure 32.

[0038] The support rod and the bearing are pre-assembled into a single integral unit. On-site, only the connection with the driving structure 32 is required, reducing on-site assembly steps and time. Moreover, for the pre-assembled single-rod bearing, if problems occur during subsequent use, it can be disassembled and replaced as a whole, without having to disassemble the components one by one, improving the maintenance efficiency.

[0039] In the present invention, two second single-rod bearings 4 are arranged on the chain seat body 1 along the axial direction of the tool, and respectively abut against the top surface and the bottom surface of the guide rail, so as to realize guiding during the chain transmission process. However, when the load on the cutter claw 2 is too large, the second single-rod bearing 4 will be affected by the lateral force, resulting in the axis deviation or inclination, and further causing the transmission jamming phenomenon, which seriously affects the tool change efficiency. In addition, during the long-term large-load transmission process, the connection part between the second single-rod bearing 4 and the chain seat body 1 may be deformed, increasing the disassembly difficulty. To solve the above problems, preferably, positioning arc grooves 13 are arranged at the top and bottom of the chain seat body 1, and the rod body part of the second single-rod bearing 4 is embedded in the positioning arc grooves 13; an arch-shaped centering seat 14 is arranged at one end of the positioning arc groove 13 close to the inner side surface, and a semi-circular hole of the centering seat 14 and the positioning arc groove 13 form a centering hole 1a, and the centering hole 1a and the rod body of the second single-rod bearing 4 adopt an interference fit. One end of the rod body of the second single-rod bearing 4 extending out of the centering seat 14 is fixed in the positioning arc groove 13 by a screw 15.

[0040] The positioning arc groove 13 provides an accurate installation position for the rod body of the second single-rod bearing 4, ensuring the accurate relative position between it and the chain seat body 1; at the same time, the semi-circular hole of the arch-shaped centering seat 14 and the positioning arc groove 13 jointly form the centering hole 1a, and the interference fit between the centering hole 1a and the rod body can ensure that the rod body of the second single-rod bearing 4 remains centered and aligned during the installation process, avoiding deviation, enhancing the anti-lateral bending ability of the rod body, and ensuring that it is not easily deformed or deviated when subjected to lateral force; and the settings of the centering seat 14 and the screw 15 limit the movement range of the second single-rod bearing 4, so that it is restricted in both the axial and radial directions, thereby effectively resisting the lateral force and bending moment. The setting of the screw 15 also facilitates installation and disassembly, simplifying the maintenance operation.

[0041] Through the synergistic effect of the positioning arc groove 13, the arch-shaped centering seat 14 and the screw 15, this design not only realizes the precise positioning and fixation of the second single-rod bearing 4, but also significantly enhances the anti-lateral bending ability of the structure, effectively solving the problems of axis deviation, transmission jamming and connection deformation caused by excessive load, thereby improving the tool change efficiency and the reliability of the overall structure.

[0042] The present invention also provides a chain mechanism for a horizontal tool magazine, including a chain tool seat structure.

[0043] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A chain cutter seat structure, characterized in that, Comprising: A chain seat body having a first connection portion and a second connection portion; A cutter claw disposed on the outer side surface of the chain seat body for fixing a cutter; Two first single-rod bearings, which respectively connect the upper overlapping portion and the lower overlapping portion of the overlapped first connection portion and the second connection portion; A driving structure for adjusting the axial distance between the two first single-rod bearings; Two second single-rod bearings disposed on the inner side surface of the chain seat body and corresponding to the two first single-rod bearings, and the second single-rod bearings are disposed perpendicular to the axis of the first single-rod bearings; Two sets of the first single-rod bearings on the same chain seat body are in rolling contact with the inner side wall of the guide rail, and the two second single-rod bearings are respectively in rolling contact with the top surface and the bottom surface of the guide rail.

2. The chain cutter seat structure according to claim 1, wherein, Both the first connection portion and the second connection portion include two connecting plates; The two connecting plates of the second connection portion and the two connecting plates of the first connection portion form a multi-layer overlapping structure.

3. The chain cutter seat structure according to claim 2, characterized in that, The two connecting plates of the second connection portion are disposed between the two connecting plates of the first connection portion; A plurality of spring plungers are uniformly arranged along the circumference of the hinge axis on the opposite surfaces of the two connecting plates of the first connection portion.

4. The chain cutter seat structure according to claim 3, wherein, A compensation driving disk is provided on the two connecting plates of the first connection portion. The compensation driving disk is provided with at least three adjusting rods uniformly distributed along the circumferential direction, and the spring plungers are installed in the adjusting rods; A groove is provided on the surface of the connecting plate away from the second connection portion. The thickness of the compensation driving disk is smaller than the depth of the groove, and a spring is provided on the shaft section of the adjusting rod located in the groove; By adding a gasket on the compensation driving disk, the compensation driving disk is driven to move axially along the first single-rod bearing in the groove, so that the spring plunger at the end of the adjusting rod passes through the connecting plate and floats against the second connection portion.

5. The chain cutter seat structure according to claim 1, wherein, The driving structure includes a receiving cavity provided at the center position of the end of the first single-rod bearing passing through the lower overlapping portion or the upper overlapping portion, and a piston rod provided at the end of the first single-rod bearing passing through the upper overlapping portion or the lower overlapping portion; The piston rod is embedded in the receiving cavity, and at least one vent hole is provided on the side wall of the receiving cavity, and the vent hole communicates with the receiving cavity.

6. The chain cutter seat structure according to claim 1, characterized in that, The driving structure: A first sleeve located between the upper overlapping portion and the lower overlapping portion, and the edges of both ends thereof extend towards the center of the circle to form convex edges; An annular clamping groove is located at the end of the rod body of the first single-rod bearing for accommodating the convex edge; Wherein, a seam is provided axially on the side wall of the first sleeve, the spacing of the seam is smaller than the diameter of the rod body of the first single-rod bearing, and the first sleeve is made of a shape memory alloy, and the deformed first sleeve makes the two first single-rod bearings approach each other axially.

7. The chain cutter seat structure according to claim 1, characterized in that, The driving structure includes: A second sleeve, both ends of which respectively penetrate through the upper overlapping portion and the lower overlapping portion; A driving groove is provided on the outer cylindrical surface of the rod body of the first single-rod bearing; A driving pin is screwed on the side wall of the second sleeve, and the end of the driving pin extending into the second sleeve abuts against the driving groove; Wherein, the bottom of the driving groove is inclined along the axial direction of the second sleeve, and gradually approaches the axis towards the direction of the upper overlapping portion or the lower overlapping portion, and the axial displacement generated by rotating the driving pin is used to drive the first single-rod bearing to move axially.

8. The chain cutter seat structure according to claim 1, wherein, Both the first single-rod bearing and the second single-rod bearing include a support rod and a bearing provided at the end of the support rod; One end of the support rod is provided with a limiting disk, and the other end passes through the upper overlapping portion or the lower overlapping portion and is connected to the driving structure.

9. The chain cutter seat structure according to claim 1, characterized in that, Positioning arc grooves are provided at both the top and the bottom of the chain seat body, and the rod body portion of the second single-rod bearing is embedded in the positioning arc groove; An arch-shaped centering seat is provided at one end of the positioning arc groove close to the inner side surface. The semi-circular hole of the centering seat and the positioning arc groove form a centering hole. The centering hole and the rod body of the second single-rod bearing are in transitional fit. One end of the rod body of the second single-rod bearing extending out of the centering seat is fixed in the positioning arc groove by a screw.

10. A chain mechanism for a horizontal tool magazine, characterized in that, Including the chain knife seat structure according to any one of claims 1-9.

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