Double position exchange seat transmission mechanism for machine tool

Abstract

The utility model relates to a kind of machine tool double-station exchange seat transmission mechanism, it includes: exchange seat pedestal, tray pedestal, screw rod transmission mechanism, tray and chain transmission mechanism, tray pedestal is horizontally movably located on exchange seat pedestal.Screw rod transmission mechanism includes horizontally extending screw rod, screw rod is rotatably located on exchange seat pedestal, and with tray pedestal forms screw joint, screw rod rotates relative to exchange seat pedestal to drive tray pedestal horizontal movement.Tray is horizontally movably located on tray pedestal, and for placing workpiece, and the horizontal moving direction of tray is identical with the horizontal moving direction of tray pedestal.Chain transmission mechanism includes driving sprocket, driven sprocket and the transmission chain of annular, driving sprocket and driven sprocket are horizontally spaced apart, and all rotatably located on tray pedestal, transmission chain is arranged around driving sprocket and driven sprocket, and is connected with tray, and driving sprocket and driven sprocket are synchronously driven by transmission chain, to drive tray horizontal movement.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, and more specifically, to a transmission mechanism for a dual-station exchange seat in a machine tool. Background Technology

[0002] Machine tools are core equipment in modern manufacturing. They mainly consist of modules such as the bed, spindle system, feed mechanism, and control system. They achieve high-precision manufacturing of metal or non-metal parts through machining processes such as cutting and forming. In traditional machine tool equipment, manual loading and unloading of workpieces are required at the workstation before and after processing, resulting in low processing efficiency.

[0003] Existing technology discloses machine tool equipment equipped with an exchange seat driven by a hydraulic cylinder or pneumatic cylinder. The movement of the exchange seat moves the workpiece between loading / unloading and machining stations, thereby improving machining efficiency. However, due to the compressibility and inertia of fluids, instantaneous impact forces are generated at the moment the hydraulic / pneumatic cylinder starts and stops, causing axial movement within the cylinder. This axial movement may lead to slight displacement of the exchange seat after it has moved into position, resulting in a decrease in the positioning accuracy of the exchange seat. Utility Model Content

[0004] The purpose of this utility model is to provide a transmission mechanism for a machine tool dual-station exchange seat, and the technical problem it solves is: how to improve positioning accuracy.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0006] This utility model provides a machine tool dual-station exchange seat transmission mechanism, which includes: an exchange seat base;

[0007] A tray base is horizontally movably mounted on the exchange seat base; a screw drive mechanism includes a horizontally extending screw, which is rotatably mounted on the exchange seat base and screwed to the tray base. The screw rotates relative to the exchange seat base to drive the tray base to move horizontally on the exchange seat base; a tray is horizontally movably mounted on the tray base and used to place workpieces, and the horizontal movement direction of the tray is the same as that of the tray base; a chain drive mechanism includes a drive sprocket, a driven sprocket, and a ring-shaped drive chain. The drive sprocket and the driven sprocket are horizontally spaced apart and rotatably mounted on the tray base. The drive chain surrounds the drive sprocket and the driven sprocket and is connected to the tray. The drive sprocket and the driven sprocket are synchronously driven through the drive chain to drive the tray to move horizontally on the tray base.

[0008] In some embodiments of this application, both the tray base and the tray can move along a first horizontal direction, and the lead screw extends along the first horizontal direction; the exchange base is provided with a slide rail and roller structure spaced apart along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction, the slide rail extends along the first horizontal direction, the roller structure includes a plurality of rollers spaced apart along the first horizontal direction, and the rollers are rotatably mounted on the exchange base; the bottom of the tray base is provided with a slide assembly and a rolling contact portion spaced apart along the second horizontal direction, the slide assembly includes a plurality of slides spaced apart along the first horizontal direction, and the slides are slidably connected to the slide rail, the rolling contact portion extends along the first horizontal direction and contacts the outer peripheral surface of the roller.

[0009] In some embodiments of this application, the chain drive mechanism further includes a hydraulic motor, a first transmission component, and a second transmission component. The output end of the hydraulic motor is provided with the first transmission component, the first transmission component is connected to the second transmission component, and the second transmission component is arranged coaxially with the drive sprocket.

[0010] In some embodiments of this application, both the first transmission member and the second transmission member have gear teeth. The chain transmission mechanism further includes a first gear and a second gear arranged coaxially. The first gear meshes with the first transmission member, and the number of teeth of the first gear is greater than the number of teeth of the first transmission member. The second gear meshes with the second transmission member, and the number of teeth of the second gear is less than the number of teeth of the second transmission member.

[0011] In some embodiments of this application, the bottom of the tray is provided with a clearance groove extending along the first horizontal direction; the hydraulic motor is located above the tray base and extends into the clearance groove, its output end passes through the tray base in a vertical direction, and the first transmission member, the second transmission member, the first gear and the second gear are all located below the tray base.

[0012] In some embodiments of this application, the bottom of the tray base is provided with an extension block; the lead screw transmission mechanism further includes a motor mounting base, a lead screw mounting base, a motor, and a lead screw seat. The motor mounting base and the lead screw mounting base are horizontally spaced apart and are both disposed on the exchange base. The motor is mounted on the motor base and connected to one end of the lead screw. The other end of the lead screw is connected to the lead screw seat. The lead screw seat is connected to the extension block and sleeved around the lead screw, with its inner wall forming a threaded connection with the outer wall of the lead screw. When the tray base moves horizontally on the exchange base, it can move until the extension block abuts against the lead screw mounting base.

[0013] In some embodiments of this application, the tray includes a tray body for placing workpieces and a hook connected to the tray body, and the hook has a downward opening. A pin is connected to the drive chain, and the pin extends upward and enters the hook through the opening to connect the drive chain and the tray body.

[0014] In some embodiments of this application, the tray base is provided with a limiting member for blocking the card post. The limiting member has a U-shaped structure and includes a first part, a second part, and a third part connected to the first part and the second part respectively. The first part and the second part are arranged vertically at intervals, and the gap between the first part and the second part allows the transmission chain to pass through.

[0015] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:

[0016] In the machine tool dual-station exchange seat transmission mechanism of this utility model embodiment, when the lead screw rotates relative to the exchange seat base, the rotation of the lead screw can be converted into horizontal movement of the pallet base. The transmission chain is used to transmit power and convert motion between the driving sprocket and the driven sprocket. When the driving sprocket rotates on the pallet base, it drives the transmission chain to move between the driving sprocket and the driven sprocket, thereby driving the pallet to move horizontally on the pallet base. Since the pallet is set on the pallet base, and the horizontal movement direction of the pallet is the same as the horizontal movement direction of the pallet base, through the superposition of their respective horizontal movements, the pallet and the workpiece on it can be moved from one station to another.

[0017] Specifically, on the one hand, the lead screw converts its rotational motion into linear displacement of the pallet base, and the threaded engagement structure between the lead screw and the pallet base has self-locking properties. On the other hand, the driving sprocket and driven sprocket respectively form multi-tooth engagement with the transmission chain, which can effectively disperse impact forces, and the momentum when the chain starts and stops can be absorbed step by step by multiple chain links. Therefore, this machine tool's dual-station exchange seat transmission mechanism utilizes the rigid contact characteristics of the lead screw transmission mechanism and the chain transmission mechanism to avoid the surging caused by the compressibility and inertia of fluids when using hydraulic cylinders or pneumatic cylinders in the prior art, thereby improving positioning accuracy. Attached Figure Description

[0018] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0019] Figure 1This is a schematic diagram of the transmission mechanism of a machine tool dual-station exchange seat according to an exemplary embodiment.

[0020] Figure 2 yes Figure 1 A structural diagram in another state.

[0021] Figure 3 yes Figure 1 A sectional view.

[0022] Figure 4 yes Figure 1 A schematic diagram of its decomposed structure.

[0023] The annotations in the attached figures are explained as follows:

[0024] 1. Exchange base; 11. Slide rail; 12. Rollers;

[0025] 2. Tray base; 21. Slide; 22. Rolling contact part; 23. Limiting element; 231. First part; 232. Third part; 24. Extension block; 25. Receiving groove;

[0026] 3. Screw drive mechanism; 31. Screw; 32. Motor mounting base; 33. Screw mounting base; 34. Motor; 35. Screw seat;

[0027] 4. Pallet; 41. Pallet body; 411. Leaving groove; 42. Hook;

[0028] 5. Chain drive mechanism; 51. Drive sprocket; 52. Driven sprocket; 53. Drive chain; 54. Hydraulic motor; 55. First transmission component; 56. Second transmission component; 57. First gear; 58. Second gear; 59. Locking pin;

[0029] D1, first horizontal direction; D2, second horizontal direction. Detailed Implementation

[0030] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0031] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0032] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0033] Please see Figures 1 to 3 The machine tool dual-station exchange seat transmission mechanism provided in one embodiment of this utility model mainly includes an exchange seat base 1, a tray base 2, a screw transmission mechanism 3, a tray 4, and a chain transmission mechanism 5. The tray base 2 is horizontally movable on the exchange seat base 1. The screw transmission mechanism 3 includes a horizontally extending screw 31, which is rotatably mounted on the exchange seat base 1 and screwed to the tray base 2. The screw 31 rotates relative to the exchange seat base 1 to drive the tray base 2 to move horizontally on the exchange seat base 1. The tray 4 is horizontally movable on the tray base 2 and is used to place workpieces. The horizontal movement direction of the tray 4 is the same as the horizontal movement direction of the tray base 2. The chain drive mechanism 5 includes a drive sprocket 51, a driven sprocket 52, and a ring-shaped drive chain 53. The drive sprocket 51 and the driven sprocket 52 are horizontally spaced apart and are rotatably mounted on the pallet base 2. The drive chain 53 is arranged around the drive sprocket 51 and the driven sprocket 52 and is connected to the pallet 4. The drive sprocket 51 and the driven sprocket 52 are synchronously driven through the drive chain 53 to drive the pallet 4 to move horizontally on the pallet base 2.

[0034] In the machine tool dual-station exchange seat transmission mechanism of this utility model embodiment, when the lead screw 31 rotates relative to the exchange seat base 1, the rotation of the lead screw 31 can be converted into horizontal movement of the pallet base 2. The transmission chain 53 is used to transmit power and convert motion between the driving sprocket 51 and the driven sprocket 52. When the driving sprocket 51 rotates on the pallet base 2, it drives the transmission chain 53 to move between the driving sprocket 51 and the driven sprocket 52, thereby enabling the pallet 4 to move horizontally on the pallet base 2. Since the pallet 4 is set on the pallet base 2, and the horizontal movement direction of the pallet 4 is the same as the horizontal movement direction of the pallet base 2, the pallet 4 and the workpiece on it can be moved from one station to another through the superposition of their respective horizontal movements.

[0035] Specifically, on the one hand, the lead screw 31 converts its rotational motion into linear displacement of the pallet base 2, and the threaded engagement structure between the lead screw 31 and the pallet base 2 has self-locking properties. On the other hand, the driving sprocket 51 and the driven sprocket 52 respectively form multi-tooth engagement with the transmission chain 53, which can effectively disperse the impact force, and the momentum when the chain starts and stops can be absorbed step by step by the multiple chain links. Therefore, the dual-station exchange seat transmission mechanism of this machine tool utilizes the rigid contact characteristics of the lead screw transmission mechanism 3 and the chain transmission mechanism 5 to avoid the surging caused by the compressibility and inertia of the fluid when using hydraulic cylinders or pneumatic cylinders in the prior art, thereby improving the positioning accuracy.

[0036] It should be noted that transferring the pallet 4 and the workpiece on it from one station to another can be done by transferring the workpiece from the loading / unloading station to the processing station, transferring the workpiece from one processing station to another, or other combinations thereof. In a practical application scenario, initially, the pallet 4 is located at the loading / unloading station for loading the workpiece. First, the lead screw drive mechanism 3 is driven to move the pallet base 2 and the pallet 4 on it to one side horizontally. Then, the chain drive mechanism 5 is driven to continue moving the pallet 4 to that side horizontally to feed it into the machine tool.

[0037] It is conceivable that in actual use, the lead screw drive mechanism 3 can be used to drive the pallet base 2 to move horizontally first, and the pallet 4 can be driven to move horizontally by the chain drive mechanism 5 to supplement the insufficient movement distance.

[0038] It should be noted that, compared to the embodiment that uses only the lead screw drive mechanism 3 to drive the pallet base 2 horizontally, the above embodiment can effectively shorten the length of the lead screw 31, avoiding significant vibration caused by large inertia when the lead screw 31 is too long. Compared to the embodiment that uses only the chain drive mechanism 5 to drive the pallet 4 horizontally, the embodiment can effectively shorten the length of the lead screw 31, reducing the instability introduced by the difficulty in controlling the slack side sag when the chain is too long.

[0039] Please see Figure 2 and Figure 4In a specific embodiment, both the tray base 2 and the tray 4 can move along the first horizontal direction D1, and the lead screw 31 extends along the first horizontal direction D1. The exchange base 1 is provided with slide rails 11 and roller structures spaced apart along the second horizontal direction D2, and the second horizontal direction D2 is perpendicular to the first horizontal direction D1. The slide rails 11 extend along the first horizontal direction D1, and the roller structure includes a plurality of rollers 12 spaced apart along the first horizontal direction D1, and the rollers 12 are rotatably mounted on the exchange base 1. The bottom of the tray base 2 is provided with slide assembly and rolling contact portion 22 spaced apart along the second horizontal direction D2. The slide assembly includes a plurality of slides 21 spaced apart along the first horizontal direction D1, and the slides 21 are slidably connected to the slide rails 11. The rolling contact portion 22 extends along the first horizontal direction D1 and contacts the outer peripheral surface of the rollers 12.

[0040] Through the sliding connection between the slide block 21 and the slide rail 11, and the rolling contact between the rolling contact part 22 and the roller 12 in the roller structure, the positioning accuracy of the horizontal movement of the lead screw transmission mechanism 3 driving the tray base 2 is improved, and it can also be made to move smoothly and stably.

[0041] Please see Figure 3 In a specific embodiment, the chain drive mechanism 5 further includes a hydraulic motor 54, a first transmission component 55, and a second transmission component 56. The output end of the hydraulic motor 54 is provided with the first transmission component 55, which is connected to the second transmission component 56. The second transmission component 56 is coaxially arranged with the drive sprocket 51. The hydraulic motor 54, as a drive source, can provide a large torque. Through the coordinated operation of the hydraulic motor 54, the first transmission component 55, the second transmission component 56, and the drive sprocket 51, the drive sprocket 51 can be stably driven to rotate.

[0042] In a specific embodiment, both the first transmission member 55 and the second transmission member 56 have gear teeth. The chain transmission mechanism 5 also includes a first gear 57 and a second gear 58 arranged coaxially. The first gear 57 meshes with the first transmission member 55, and the number of teeth of the first gear 57 is greater than the number of teeth of the first transmission member 55. The second gear 58 meshes with the second transmission member 56, and the number of teeth of the second gear 58 is less than the number of teeth of the second transmission member 56.

[0043] The meshing between the first transmission member 55 and the first gear 57, and the meshing between the second gear 58 and the second transmission member 56, can form a two-stage reduction, which can significantly increase the torque and improve the rotational accuracy.

[0044] In this embodiment, the first gear 57 and the second gear 58 form a gear set, and the first transmission member 55, the gear set and the second transmission member 56 are arranged sequentially in the first horizontal direction D1.

[0045] Please see Figures 2 to 4 In a specific embodiment, the bottom of the tray 4 is provided with a clearance groove 411 extending along the first horizontal direction D1. The hydraulic motor 54 is located above the tray base 2 and extends into the clearance groove 411. Its output end passes through the tray base 2 vertically. The first transmission component 55, the second transmission component 56, the first gear 57, and the second gear 58 are all located below the tray base 2 to reasonably arrange the vertical space and improve the compactness of the overall structure. The hydraulic motor 54 is independently installed above the tray 4, which facilitates its maintenance and management. When the tray 4 moves on the tray base 2 along the first horizontal direction D1, the clearance groove 411 can form a clearance for the hydraulic motor 54 to avoid collision and ensure the safety and stability of the overall structure.

[0046] Please see Figure 3 and Figure 4 In a specific embodiment, the bottom of the tray base 2 is provided with an extension block 24. The screw drive mechanism 3 also includes a motor mounting base 32, a screw mounting base 33, a motor 34, and a screw seat 35. The motor mounting base 32 and the screw mounting base 33 are horizontally spaced apart and are both located on the exchange base 1. The motor 34 is mounted on the motor 34 base and connected to one end of the screw 31. The other end of the screw 31 is connected to the screw 31 base. The screw seat 35 is connected to the extension block 24 and is fitted over the screw 31, with its inner wall forming a threaded connection with the outer wall of the screw 31. When the tray base 2 moves horizontally on the exchange base 1, it can move until the extension block 24 abuts against the screw mounting base 33.

[0047] The motor 34 drives the lead screw 31 to rotate. The rotational motion is converted into linear motion of the lead screw seat 35 through the threaded pair formed by the lead screw 31 and the lead screw seat 35, which in turn drives the pallet base 2 to move horizontally as a whole. When the pallet base 2 moves horizontally to the point where the extension block 24 contacts the lead screw mounting seat 33, a hard limit is formed, which forms a mechanical stop, thereby preventing the pallet base 2 from moving excessively.

[0048] In this embodiment, the lead screw 31 is a ball screw 31.

[0049] In other embodiments, the extension block 24 is fitted over the lead screw 31, and its inner wall is threaded to the outer wall of the lead screw 31. The tray base 2 is screwed to the lead screw 31 through the extension block 24.

[0050] Please see Figure 1 and Figure 2In a specific embodiment, the tray 4 includes a tray body 41 for placing workpieces and a hook 42 connected to the tray body 41. The hook 42 has a downward opening. A locking pin 59 is connected to the drive chain 53. The locking pin 59 extends upward and enters the hook 42 through the opening to connect the drive chain 53 and the tray body 41. The drive chain 53 moves between the driving sprocket 51 and the driven sprocket 52, causing the locking pin 59 connected to it to move horizontally. Through the cooperation between the locking pin 59 and the hook 42, the tray body 41 can be driven to move horizontally.

[0051] Please see Figure 1 , Figure 2 and Figure 4 In a specific embodiment, the tray base 2 is provided with a limiting member 23 for blocking the locking post 59. The limiting member 23 has a U-shaped structure and includes a first part 231, a second part, and a third part 232 connected to the first part 231 and the second part respectively. The first part 231 and the second part are arranged vertically at intervals, and the gap between the first part 231 and the second part allows the transmission chain 53 to pass through. When the tray 4 moves horizontally until the locking post 59 contacts the limiting member 23, it forms a hard limit, creating a mechanical stop, thereby preventing the tray 4 from moving excessively. The specific structure of the limiting member 23 ensures that the transmission chain 53 can operate normally when it is not in contact with the locking post 59.

[0052] Please see Figures 1 to 4 In the above embodiments, the top surface of the tray base 2 is provided with a receiving groove 25, and the driving sprocket 51, the driven sprocket 52 and the transmission chain 53 are all located in the receiving groove 25.

[0053] In the above embodiments, the transmission chain 53 includes an upper chain and a lower chain arranged vertically to improve the safety and stability of the transmission chain 53.

[0054] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A transmission mechanism for a dual-station exchange seat in a machine tool, characterized in that, include: Exchange base; A tray base is horizontally movable and mounted on the exchange seat base; A lead screw drive mechanism includes a horizontally extending lead screw, which is rotatably mounted on the exchange seat base and screwed to the tray base. The lead screw rotates relative to the exchange seat base to drive the tray base to move horizontally on the exchange seat base. A tray is horizontally movable on a tray base and is used to place workpieces, wherein the horizontal movement direction of the tray is the same as the horizontal movement direction of the tray base; The chain drive mechanism includes a drive sprocket, a driven sprocket, and a ring-shaped drive chain. The drive sprocket and the driven sprocket are horizontally spaced apart and rotatably mounted on the pallet base. The drive chain surrounds the drive sprocket and the driven sprocket and is connected to the pallet. The drive sprocket and the driven sprocket are synchronously driven by the drive chain to drive the pallet to move horizontally on the pallet base.

2. The machine tool dual-station exchange seat transmission mechanism according to claim 1, characterized in that, Both the tray base and the tray can move along a first horizontal direction, and the lead screw extends along the first horizontal direction; The base of the exchange seat is provided with a slide rail and a roller structure spaced apart along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction. The slide rail extends along the first horizontal direction, and the roller structure includes a plurality of rollers spaced apart along the first horizontal direction, and the rollers are rotatably mounted on the base of the exchange seat. The bottom of the tray base is provided with a slide assembly and a rolling contact portion spaced apart along the second horizontal direction. The slide assembly includes a plurality of slides spaced apart along the first horizontal direction, and the slides are slidably connected to the slide rail. The rolling contact portion extends along the first horizontal direction and contacts the outer peripheral surface of the roller.

3. The machine tool dual-station exchange seat transmission mechanism according to claim 2, characterized in that, The chain drive mechanism further includes a hydraulic motor, a first transmission component, and a second transmission component. The output end of the hydraulic motor is provided with the first transmission component. The first transmission component is connected to the second transmission component, and the second transmission component is arranged coaxially with the drive sprocket.

4. The machine tool dual-station exchange seat transmission mechanism according to claim 3, characterized in that, Both the first transmission member and the second transmission member have gear teeth. The chain transmission mechanism further includes a first gear and a second gear arranged coaxially. The first gear meshes with the first transmission member, and the number of teeth of the first gear is greater than the number of teeth of the first transmission member. The second gear meshes with the second transmission member, and the number of teeth of the second gear is less than the number of teeth of the second transmission member.

5. The machine tool dual-station exchange seat transmission mechanism according to claim 4, characterized in that, The bottom of the tray is provided with a clearance groove extending along the first horizontal direction; The hydraulic motor is located above the pallet base and extends into the clearance groove. Its output end passes through the pallet base in a vertical direction, and the first transmission component, the second transmission component, the first gear, and the second gear are all located below the pallet base.

6. The machine tool dual-station exchange seat transmission mechanism according to claim 1, characterized in that, The bottom of the tray base is provided with an extension block; The lead screw transmission mechanism further includes a motor mounting base, a lead screw mounting base, a motor, and a lead screw seat. The motor mounting base and the lead screw mounting base are horizontally spaced apart and are both located on the exchange base. The motor is mounted on the motor base and connected to one end of the lead screw. The other end of the lead screw is connected to the lead screw seat. The lead screw seat is connected to the extension block and is fitted over the lead screw, with its inner wall forming a threaded connection with the outer wall of the lead screw. When the tray base moves horizontally on the exchange seat base, it can move until the extension block abuts against the lead screw mounting seat.

7. The machine tool dual-station exchange seat transmission mechanism according to claim 1, characterized in that, The tray includes a tray body for placing workpieces and a hook connected to the tray body, the hook having a downward opening, and a locking post connected to the drive chain, the locking post extending upward and extending into the hook through the opening to connect the drive chain and the tray body.

8. The machine tool dual-station exchange seat transmission mechanism according to claim 7, characterized in that, The tray base is provided with a limiting member for blocking the card post. The limiting member has a U-shaped structure and includes a first part, a second part, and a third part that is connected to the first part and the second part respectively. The first part and the second part are arranged vertically at intervals, and the gap between the first part and the second part allows the transmission chain to pass through.

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