Jig distance fixing device

Abstract

The utility model discloses a jig distance fixing device which comprises a base, a first ball screw pair and a driving mechanism, and two screw seats are symmetrically arranged on the two sides of the upper end face of the base. The first ball screw pair comprises a first combined lead screw, a first nut and a second nut, the two ends of the first combined lead screw are rotationally connected with the two lead screw bases correspondingly, and the first combined lead screw comprises a first lead screw body and a second lead screw body which are coaxially arranged and opposite in thread rotating direction; the first screw rod and the second screw rod are mutually spliced to form a first combined screw rod, the screw pitches of the first screw rod and the second screw rod are the same or different, the first screw rod is sleeved with the first nut, the second screw rod is sleeved with the second nut, and the first nut and the second nut are both fixedly connected with a first carrying plate used for bearing a jig; the driving mechanism is connected with the first combined lead screw and can drive the first combined lead screw to rotate. According to the embodiment of the utility model, different fixed-distance requirements can be met.

Description

Technical Field

[0001] This utility model relates to the field of jig spacing technology, and in particular to a jig spacing device. Background Technology

[0002] Currently, in modern industrial production, fixtures are typically used to fix workpieces or guide cutting tools for specific operations, thereby ensuring machining accuracy. To accommodate workpieces of different sizes and shapes, fixtures need to be flexible enough to allow for quick and accurate changes and setting of different working distances. In existing technology, fixture spacing devices are widely used in non-standard automated equipment in factories. By moving several fixture-loaded carriers closer together or further apart, the distance between the fixtures is adjusted, thus achieving a fixed spacing. However, traditional fixture spacing devices cannot meet the different spacing requirements of different application scenarios, limiting their application scope. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a jig spacing device that can meet different spacing requirements.

[0004] A fixture positioning device according to this utility model includes a base, a first ball screw pair, and a drive mechanism. Two screw seats are symmetrically arranged on both sides of the upper surface of the base. The first ball screw pair includes a first combined screw, a first nut, and a second nut. The two ends of the first combined screw are rotatably connected to the two screw seats. The first combined screw includes a first screw and a second screw arranged coaxially with opposite thread directions. The first screw and the second screw are spliced ​​together to form the first combined screw. The first screw and the second screw may have the same or different thread pitches. The first nut is fitted onto the first screw, and the second nut is fitted onto the second screw. Both the first nut and the second nut are fixedly connected to a first carrier plate for supporting the fixture. The drive mechanism is connected to the first combined screw and can drive the first combined screw to rotate.

[0005] The jig spacing device according to the above embodiments of the present invention has at least the following beneficial effects:

[0006] The jig spacing device provided in this embodiment employs a first combined lead screw, which is spliced ​​together from a first lead screw and a second lead screw. When the first combined lead screw is driven to rotate by a drive mechanism, the first nut and the second nut can move closer or further apart due to the opposite thread directions of the first and second lead screws, thus forming a spacing and adjusting the distance between the two jigs to meet the spacing requirements. By using a spliced ​​first combined lead screw, lead screws of different lengths or pitches can be freely combined and spliced ​​according to the spacing requirements of different application scenarios, thereby meeting different jig spacing requirements, expanding the application range, and having a simple structure that can be quickly replaced according to different spacing requirements, improving versatility and expandability.

[0007] According to some embodiments of the present invention, one end of the first lead screw is provided with a connecting hole along the axial direction, and one end of the second lead screw is provided with a connecting post along the axial direction. The shape of the connecting hole and the connecting post are adapted to each other, and the connecting post can be inserted into the connecting hole to form the first combined lead screw.

[0008] According to some embodiments of this utility model, the cross-section of the connecting post is square, and the shape of the connecting hole is adapted to the connecting post.

[0009] According to some embodiments of this utility model, the pitches of the first lead screw and the second lead screw are different.

[0010] According to some embodiments of the present invention, the first ball screw pair further includes a first guide rail, the first guide rail extends axially along the first combined screw, the first guide rail is fixed to the upper end face of the base and located on one side of the first combined screw, the first carrier plate extends outward with a first extension plate, the bottom of the first extension plate is fixedly connected with a first slider, and the first slider is slidably connected to the first guide rail.

[0011] According to some embodiments of this utility model, the fixture spacing device further includes a second ball screw pair, which includes a second combined screw, a third nut, and a fourth nut. The second combined screw is arranged side by side with the first combined screw. The two ends of the second combined screw are rotatably connected to the two screw seats. The second combined screw includes a third screw and a fourth screw arranged coaxially with opposite thread directions. The third screw and the fourth screw are spliced ​​together to form the second combined screw. The pitch of the third screw and the fourth screw may be the same or different. The third nut is fitted onto the third screw, and the fourth nut is fitted onto the fourth screw. Both the third nut and the fourth nut are fixedly connected to a second carrier plate for supporting the fixture.

[0012] According to some embodiments of this utility model, the pitches of the first lead screw, the second lead screw, the third lead screw, and the fourth lead screw are all different.

[0013] According to some embodiments of the present invention, the second ball screw pair further includes a second guide rail, which extends axially along the second combined screw, is fixed to the upper end face of the base and located on one side of the second combined screw, and the second carrier plate extends outward with a second extension plate, and a second slider is fixedly connected to the bottom of the second extension plate, and the second slider is slidably connected to the second guide rail.

[0014] According to some embodiments of the present invention, both ends of the first combined lead screw are provided with a first rotating shaft, the lead screw seat is provided with a first mounting groove for installing a first bearing, the first rotating shaft is rotatably connected to the first bearing, and the first mounting groove is provided with a first inner retaining spring at its opening; both ends of the second combined lead screw are provided with a second rotating shaft, the lead screw seat is provided with a second mounting groove for installing a second bearing, the second rotating shaft is rotatably connected to the second bearing, and the second mounting groove is provided with a second inner retaining spring at its opening.

[0015] According to some embodiments of the present invention, the drive mechanism includes a motor, a main gear, a first auxiliary gear, and a second auxiliary gear. The motor is mounted on the base and connected to the main gear. The first auxiliary gear is connected to one of the first rotating shafts, and the second auxiliary gear is connected to one of the second rotating shafts. The main gear, the first auxiliary gear, and the second auxiliary gear are connected by a belt drive.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the jig spacing device according to an embodiment of the present utility model;

[0019] Figure 2 This is a partial structural schematic diagram of the jig spacing device according to an embodiment of the present utility model;

[0020] Figure 3 This is a partial structural schematic diagram of the first combined lead screw according to an embodiment of the present utility model;

[0021] Figure 4 This is another partial structural schematic diagram of the jig spacing device according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the drive mechanism according to an embodiment of the present utility model;

[0023] Figure 6 This is a partial structural diagram of the first lead screw according to an embodiment of the present invention.

[0024] In the attached figures, the following labels are used:

[0025] Base 100; Lead screw seat 110; First bearing 120; First inner retaining spring 130; Second bearing 140; Second inner retaining spring 150;

[0026] First lead screw 210; connecting hole 211; second lead screw 220; connecting post 221; first nut 230; second nut 240; first carrier plate 250; first extension plate 251; first guide rail 260; first slider 270; first rotating shaft 280;

[0027] Third lead screw 310; Fourth lead screw 320; Third nut 330; Fourth nut 340; Second carrier plate 350; Second extension plate 351; Second guide rail 360; Second slider 370;

[0028] Main gear 410; first auxiliary gear 420; second auxiliary gear 430; belt 440. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] Reference Figures 1 to 3 According to the present invention, a fixture positioning device includes a base 100, a first ball screw pair, and a drive mechanism. Two screw seats 110 are symmetrically arranged on both sides of the upper surface of the base 100. The first ball screw pair includes a first combined screw, a first nut 230, and a second nut 240. The two ends of the first combined screw are rotatably connected to the two screw seats 110. The first combined screw includes a first screw 210 and a second screw 220 arranged coaxially with opposite thread directions. The first screw 210 and the second screw 220 are spliced ​​together to form the first combined screw. The pitches of the first screw 210 and the second screw 220 may be the same or different. The first nut 230 is fitted onto the first screw 210, and the second nut 240 is fitted onto the second screw 220. Both the first nut 230 and the second nut 240 are fixedly connected to a first carrier plate 250 for supporting the fixture. The drive mechanism is connected to the first combined screw and can drive the first combined screw to rotate.

[0034] It is understood that the jig spacing device provided in this embodiment of the present invention uses a first combined lead screw composed of a first lead screw 210 and a second lead screw 220. When the first combined lead screw is driven to rotate by the driving mechanism, since the threads of the first lead screw 210 and the second lead screw 220 have opposite directions, the first nut 230 and the second nut 240 can move closer or further apart, thus forming a spacing and adjusting the distance between the two jigs to meet the spacing requirements. By using a spliced ​​first combined lead screw, lead screws of different lengths or pitches can be freely combined and spliced ​​according to the spacing requirements of different application scenarios, thereby meeting different jig spacing requirements, expanding the application range, and having a simple structure that can be quickly replaced according to different spacing requirements, improving versatility and expandability.

[0035] It should be noted that, in this embodiment of the utility model, since the distance between the two lead screw seats 110 is fixed, when different lengths of the first lead screw 210 and the second lead screw 220 are selected for combination splicing, it is necessary to ensure that the length of the first combined lead screw after splicing remains unchanged. The specific length can be determined according to the actual situation and is not specifically limited here.

[0036] Furthermore, in some embodiments, the distance between the two lead screw seats 110 can be variable, so that it can be adjusted according to different application scenarios to adapt to the first combined lead screw of different lengths. For example, the lead screw seat 110 can be slidably connected to the upper end face of the base 100, and the lead screw seat 110 can be moved by a drive structure such as a lead screw motor, thereby adjusting the distance between the two lead screw seats 110. However, it is not limited to this, and will not be described in detail here.

[0037] It should be noted that, in this embodiment of the utility model, the first combined lead screw is not limited to being composed of two lead screws spliced ​​together, but can also be composed of more lead screws spliced ​​together. The thread direction of two adjacent lead screws can be the same or opposite. The pitch of multiple lead screws can be the same or different, or several lead screws can have the same pitch. It can be determined according to the actual situation, and will not be elaborated here.

[0038] It should be noted that in this embodiment of the utility model, the number of the first nut 230 and the second nut 240 is not limited to one, but can be more than one. The multiple first nuts 230 or multiple second nuts 240 can be distributed at equal intervals or at unequal intervals, which can be determined according to the actual situation, and will not be elaborated here.

[0039] Furthermore, refer to Figure 3According to some embodiments of the present invention, one end of the first lead screw 210 is provided with a connecting hole 211 along the axial direction, and one end of the second lead screw 220 is provided with a connecting post 221 along the axial direction. The connecting hole 211 and the connecting post 221 are adapted to each other in shape, and the connecting post 221 can be inserted into the connecting hole 211 to splice into a first combined lead screw.

[0040] Understandably, the design of the connecting hole 211 and the connecting post 221 makes the assembly of the first combined lead screw simpler, and also facilitates disassembly and maintenance, reducing maintenance costs and time. Furthermore, the matching shape of the connecting hole 211 and the connecting post 221 ensures precise docking between the two lead screws, thereby guaranteeing the working performance of the entire combined lead screw.

[0041] Preferably, according to some embodiments of the present invention, the cross-section of the connecting post 221 is square, and the shape of the connecting hole 211 is adapted to the connecting post 221.

[0042] Understandably, the square cross-section connecting post 221 and connecting hole 211 cooperate to increase the contact area and improve the connection strength. At the same time, it can prevent rotation or misalignment during use and ensure that the first lead screw 210 and the second lead screw 220 rotate synchronously, thus ensuring long-term stability.

[0043] It should be noted that the shape of the connecting post 221 and the connecting hole 211 is not limited to the square shape mentioned above, but can also be other shapes, such as rectangles, ovals, irregular shapes, etc., as long as they can ensure the synchronous rotation of the first lead screw 210 and the second lead screw 220. Further details will not be provided here.

[0044] Preferably, according to some embodiments of the present invention, the pitches of the first lead screw 210 and the second lead screw 220 are different. The speed and accuracy of the pitch adjustment can be optimized according to the needs of specific application scenarios. The specific pitch can be determined according to the actual situation and is not specifically limited here.

[0045] Furthermore, refer to Figure 1 and Figure 2 According to some embodiments of the present invention, the first ball screw pair further includes a first guide rail 260, which extends axially along the first combined screw. The first guide rail 260 is fixed to the upper end face of the base 100 and located on one side of the first combined screw. The first carrier plate 250 extends outward with a first extension plate 251. The bottom of the first extension plate 251 is fixedly connected to a first slider 270, which is slidably connected to the first guide rail 260.

[0046] Understandably, the design of the first guide rail 260 and the first slider 270 ensures that the first carrier plate 250 moves smoothly along a straight path, further improving positioning accuracy and effectively reducing errors caused by vibration during movement.

[0047] Furthermore, refer to Figure 1 and Figure 2 According to some embodiments of the present invention, the fixture spacing device further includes a second ball screw pair, which includes a second combined screw, a third nut 330, and a fourth nut 340. The second combined screw is arranged side by side with the first combined screw. The two ends of the second combined screw are rotatably connected to two screw seats 110. The second combined screw includes a third screw 310 and a fourth screw 320 arranged coaxially and with opposite thread directions. The third screw 310 and the fourth screw 320 are spliced ​​together to form the second combined screw. The pitch of the third screw 310 and the fourth screw 320 may be the same or different. The third nut 330 is fitted onto the third screw 310, and the fourth nut 340 is fitted onto the fourth screw 320. Both the third nut 330 and the fourth nut 340 are fixedly connected to a second carrier plate 350 for supporting the fixture.

[0048] Understandably, the addition of a second ball screw pair can further increase the number of different permutations and combinations, thereby deriving different fixture spacing schemes, which greatly expands the application range and adaptability.

[0049] Preferably, according to some embodiments of this utility model, the pitches of the first lead screw 210, the second lead screw 220, the third lead screw 310, and the fourth lead screw 320 are all different. The speed and accuracy of the spacing adjustment can be optimized according to the needs of specific application scenarios. The specific pitch can be determined according to actual conditions and is not specifically limited here. However, it is not limited to this. In some embodiments, the pitches of the first lead screw 210 and the second lead screw 220 may be the same, the pitches of the third lead screw 310 and the fourth lead screw 320 may be the same, and the pitches of the first lead screw 210 and the third lead screw 310 may be different. This can be determined according to actual conditions to meet different jig spacing requirements, and will not be elaborated further here.

[0050] It should be noted that, in this embodiment of the utility model, the splicing method of the third lead screw 310 and the fourth lead screw 320 can be the same as the splicing method of the first lead screw 210 and the second lead screw 220, and therefore should have the same beneficial effects, which will not be elaborated here.

[0051] It should be noted that, in this embodiment of the utility model, the second combined lead screw is not limited to being composed of two lead screws spliced ​​together, but can also be composed of more lead screws spliced ​​together. The thread direction of two adjacent lead screws can be the same or opposite. The pitch of multiple lead screws can be the same or different, or several lead screws can have the same pitch. It can be determined according to the actual situation, and will not be elaborated here.

[0052] It should be noted that in this embodiment of the utility model, the number of the third nut 330 and the fourth nut 340 is not limited to one, but can be more than one. The multiple third nuts 330 or multiple fourth nuts 340 can be distributed at equal intervals or at unequal intervals, which can be determined according to the actual situation, and will not be elaborated here.

[0053] Furthermore, refer to Figure 1 and Figure 2 According to some embodiments of the present invention, the second ball screw assembly further includes a second guide rail 360, which extends axially along the second combined screw. The second guide rail 360 is fixed to the upper end face of the base 100 and located on one side of the second combined screw. A second extension plate 351 extends outward from the second carrier plate 350, and a second slider 370 is fixedly connected to the bottom of the second extension plate 351. The second slider 370 is slidably connected to the second guide rail 360. Further, in embodiments of the present invention, the first guide rail 260 and the second guide rail 360 are symmetrically arranged on both sides of the screw seat 110.

[0054] Understandably, the design of the second guide rail 360 and the second slider 370 ensures that the second carrier plate 350 moves smoothly along a straight path, further improving positioning accuracy and effectively reducing errors caused by vibration during movement.

[0055] Furthermore, refer to Figures 4 to 6 According to some embodiments of the present invention, both ends of the first combined lead screw are provided with a first rotating shaft 280, and the diameter of the first rotating shaft 280 is smaller than the diameter of the first combined lead screw. The lead screw seat 110 is provided with a first mounting groove for mounting the first bearing 120. The first rotating shaft 280 is rotatably connected to the first bearing 120. The first mounting groove is provided with a first inner retaining spring 130 at the opening.

[0056] It is understandable that, since the diameter of the first rotating shaft 280 is smaller than the diameter of the first combined lead screw, the cooperation between the first rotating shaft 280 and the first bearing 120 can prevent the first combined lead screw from moving axially. At the same time, the first inner retaining spring 130 can effectively prevent the first bearing 120 from coming out.

[0057] Furthermore, refer to Figures 4 to 6According to some embodiments of the present invention, a second rotating shaft is provided at both ends of the second combined lead screw, and the diameter of the second rotating shaft is smaller than the diameter of the second combined lead screw. The lead screw seat 110 is provided with a second mounting groove for mounting a second bearing 140. The second rotating shaft is rotatably connected to the second bearing 140. A second inner retaining spring 150 is provided at the opening of the second mounting groove.

[0058] It is understandable that, since the diameter of the second rotating shaft is smaller than the diameter of the second combined lead screw, the cooperation between the second rotating shaft and the second bearing 140 can prevent the second combined lead screw from moving axially. At the same time, the second inner retaining spring 150 can effectively prevent the second bearing 140 from coming out.

[0059] It is understandable that due to dimensional errors during the manufacturing process of the lead screw, wear at the joint during long-term use, or misalignment at the joint caused by excessive load, the overall straightness of the two spliced ​​lead screws may deviate during use, resulting in a decrease in the overall accuracy of the system. To solve these technical problems, some embodiments of this utility model provide a bearing seat at the joint of the two spliced ​​lead screws, with a structure similar to or the same as that of the lead screw seat 110 described above. The bearing seat also contains a bearing, and the two lead screws are spliced ​​within the bearing, allowing the spliced ​​ends of the two lead screws to be rotatably connected to the two ends of the bearing. This improves the overall straightness of the two spliced ​​lead screws during use, thereby enhancing the overall accuracy of the system.

[0060] Furthermore, refer to Figure 5 According to some embodiments of the present invention, the drive mechanism includes a motor, a main gear 410, a first auxiliary gear 420, and a second auxiliary gear 430. The motor is mounted on the base 100 and connected to the main gear 410. The first auxiliary gear 420 is connected to one of the first rotating shafts 280, and the second auxiliary gear 430 is connected to one of the second rotating shafts. The main gear 410, the first auxiliary gear 420, and the second auxiliary gear 430 are connected by a belt 440.

[0061] It is understandable that by connecting the main gear 410, the first auxiliary gear 420, and the second auxiliary gear 430 via the belt 440, the motor can simultaneously drive the first and second combined lead screws, achieving synchronous rotation of the two shafts. However, this is not the only possibility; other structural methods can also be used, depending on the actual situation, and will not be elaborated upon here.

[0062] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A fixture spacing device, characterized in that, include: The base has two lead screw seats symmetrically arranged on both sides of its upper surface; The first ball screw assembly includes a first combined screw, a first nut, and a second nut. The two ends of the first combined screw are rotatably connected to the two screw seats. The first combined screw includes a first screw and a second screw arranged coaxially with opposite thread directions. The first screw and the second screw are spliced ​​together to form the first combined screw. The first screw and the second screw have the same or different thread pitches. The first nut is fitted onto the first screw, and the second nut is fitted onto the second screw. Both the first nut and the second nut are fixedly connected to a first carrier plate for supporting the fixture. A drive mechanism is connected to the first combined lead screw and is capable of driving the first combined lead screw to rotate.

2. The jig spacing device according to claim 1, characterized in that, One end of the first lead screw is provided with a connecting hole along the axial direction, and one end of the second lead screw is provided with a connecting post along the axial direction. The shape of the connecting hole and the connecting post are adapted to each other, and the connecting post can be inserted into the connecting hole to form the first combined lead screw.

3. The jig spacing device according to claim 2, characterized in that, The cross-section of the connecting post is square, and the shape of the connecting hole is adapted to the connecting post.

4. The jig spacing device according to claim 1, characterized in that, The first lead screw and the second lead screw have different pitches.

5. The jig spacing device according to claim 1, characterized in that, The first ball screw assembly further includes a first guide rail, which extends axially along the first combined screw. The first guide rail is fixed to the upper end face of the base and located on one side of the first combined screw. The first carrier plate extends outward with a first extension plate, and a first slider is fixed to the bottom of the first extension plate. The first slider is slidably connected to the first guide rail.

6. The jig spacing device according to claim 1, characterized in that, The fixture spacing device further includes a second ball screw pair, which includes a second combined screw, a third nut, and a fourth nut. The second combined screw is arranged side by side with the first combined screw. The two ends of the second combined screw are rotatably connected to the two screw seats. The second combined screw includes a third screw and a fourth screw arranged coaxially with opposite thread directions. The third screw and the fourth screw are spliced ​​together to form the second combined screw. The pitch of the third screw and the fourth screw may be the same or different. The third nut is fitted onto the third screw, and the fourth nut is fitted onto the fourth screw. Both the third nut and the fourth nut are fixedly connected to a second carrier plate for supporting the fixture.

7. The fixture spacing device according to claim 6, characterized in that, The pitches of the first lead screw, the second lead screw, the third lead screw, and the fourth lead screw are all different.

8. The jig spacing device according to claim 6, characterized in that, The second ball screw assembly also includes a second guide rail, which extends axially along the second combined screw. The second guide rail is fixed to the upper end face of the base and located on one side of the second combined screw. The second carrier plate extends outward with a second extension plate, and a second slider is fixed to the bottom of the second extension plate. The second slider is slidably connected to the second guide rail.

9. The jig spacing device according to claim 6, characterized in that, The first combined lead screw has a first rotating shaft at both ends, and the lead screw seat has a first mounting groove for installing a first bearing. The first rotating shaft is rotatably connected to the first bearing, and the first mounting groove has a first inner retaining spring at its opening. The second combined lead screw has a second rotating shaft at both ends, and the lead screw seat has a second mounting groove for installing a second bearing. The second rotating shaft is rotatably connected to the second bearing, and the second mounting groove has a second inner retaining spring at its opening.

10. The jig spacing device according to claim 9, characterized in that, The drive mechanism includes a motor, a main gear, a first auxiliary gear, and a second auxiliary gear. The motor is mounted on the base and connected to the main gear. The first auxiliary gear is connected to one of the first rotating shafts, and the second auxiliary gear is connected to one of the second rotating shafts. The main gear, the first auxiliary gear, and the second auxiliary gear are connected by a belt drive.

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