Flexible belt transmission device and three-coordinate measuring machine

Abstract

The utility model provides a flexible belt transmission device and a three-coordinate measuring machine, the flexible belt transmission device comprises a driving motor, a driving belt wheel, a driven belt wheel, a transmission belt and a flexible connecting mechanism, the transmission belt is provided with a first joint end and a second joint end; the flexible connecting mechanism comprises a to-be-transmitted part connecting part, a first floating connecting part, a second floating connecting part and an elastic part. The first floating connecting piece is fixedly connected with the first connector end, the second floating connecting piece is fixedly connected with the second connector end, a connecting part is formed on the part to be connected with the transmission part, and the first floating connecting piece and the second floating connecting piece are both separated from the connecting part by a certain distance. And elastic components are arranged between the first floating connecting piece and the connecting part and between the second floating connecting piece and the connecting part. According to the flexible belt transmission device, the flexible connecting mechanism can absorb vibration and impact energy of the transmission belt, so that transmission is more stable; the influence of vibration of the transmission device on a measuring system can be weakened, and the measuring precision of the three-coordinate measuring machine is improved.

Description

Technical Field

[0001] The utility model relates to a belt drive device, in particular to a flexible belt drive device capable of absorbing the vibration of a transmission belt and a coordinate measuring machine with the flexible belt drive device. Background Art

[0002] Coordinate measuring machines, with their high precision, high flexibility, and excellent digital capabilities, have become an important means for modern manufacturing industries, especially in the design, development, manufacturing, and quality assurance of the mold industry. Materials, structures, connections, bearings, transmissions, control systems, probes, and measurement software all affect the performance of the measuring machine, and in particular, the transmission device has a great impact on its performance.

[0003] Currently, most coordinate measuring machines use belt drives. The drive system is driven by a servo motor. During operation, the servo motor will vibrate, and the vibration will be transmitted to the measuring system of the measuring machine through the belt pulley and the transmission belt, affecting the measurement accuracy. In addition, when the measurement stroke is large and the span between the driving belt pulley and the driven belt pulley of the transmission belt is large, the transmission belt is also prone to vibration during operation, and this vibration transmitted to the measuring system will also affect the measurement accuracy.

[0004] Based on this, it is urgent to improve the existing belt drive device so that it can absorb the vibration generated by the belt drive device when applied to a coordinate measuring machine and improve the measurement accuracy of the coordinate measuring machine. Summary of the Invention

[0005] The utility model provides a flexible belt drive device and a coordinate measuring machine to solve the problem that the vibration generated by the belt drive device in the prior art affects the running stability of the linear motion components of the coordinate measuring machine, and further affects the measurement accuracy of the coordinate measuring machine.

[0006] To achieve the above technical effects, the technical solution adopted by the flexible belt drive device proposed by the utility model is that a flexible belt drive device includes:

[0007] A driving motor;

[0008] A driving belt pulley, which is installed on the output end of the driving motor;

[0009] A driven belt pulley;

[0010] A transmission belt, which is in transmission connection with the driving belt pulley and the driven belt pulley, and the transmission belt has a first joint end and a second joint end;

[0011] A flexible connection mechanism, which includes a connecting component for the component to be driven, a first floating connecting piece, a second floating connecting piece, and an elastic component in a compressed state; the first floating connecting piece is fixedly connected to the first joint end, the second floating connecting piece is fixedly connected to the second joint end, and the first floating connecting piece and the second floating connecting piece are connected as a whole; a connecting portion is formed on the connecting component for the component to be driven, the first floating connecting piece and the second floating connecting piece are respectively located on opposite sides of the connecting portion and are spaced apart from the connecting portion by a certain distance, and the elastic component is provided between the first floating connecting piece and the connecting portion and between the second floating connecting piece and the connecting portion.

[0012] Multiple elastic components are arranged in parallel between the first floating connecting piece and the connecting portion, and multiple elastic components are arranged in parallel between the second floating connecting piece and the connecting portion.

[0013] A through portion is provided on the connecting portion, and the first floating connecting piece and the second floating connecting piece are fixedly connected by a guide rod; the guide rod passes through the through portion, and the diameter of the through portion is larger than the diameter of the guide rod so that the guide rod does not contact the through portion; the elastic component is a spring sleeved on the guide rod, and both ends of the spring between the first floating connecting piece and the connecting portion are respectively abutted against the first floating connecting piece and the connecting portion, and both ends of the spring between the second floating connecting piece and the connecting portion are respectively abutted against the second floating connecting piece and the connecting portion.

[0014] First limiting grooves and second limiting grooves communicating with the through portion are respectively formed on opposite side surfaces of the connecting portion, the first limiting grooves and the second limiting grooves are coaxial with the through portion and their inner diameters are larger than the diameter of the through portion; one end of the spring between the first floating connecting piece and the connecting portion is positioned in the first limiting groove, and one end of the spring between the second floating connecting piece and the connecting portion is positioned in the second limiting groove.

[0015] The drive belt is a multi-wedge belt.

[0016] The first floating connecting piece includes a first connecting piece body and a first pressing plate, the first pressing plate is in alignment with the first connecting piece body and is detachably connected, clamping the first joint end between the first connecting piece and the first pressing plate;

[0017] The second floating connecting piece includes a second connecting piece body and a second pressing plate, the second pressing plate is in alignment with the second connecting piece body and is detachably connected, clamping the second joint end between the second connecting piece and the second pressing plate.

[0018] The first connecting member body and / or the first pressing plate are / is provided with a convex portion, and the second connecting member body and / or the second pressing plate are / is also provided with a convex portion.

[0019] The first floating connecting member and the second floating connecting member are symmetrically arranged.

[0020] The component to be driven includes a first connecting component and a second connecting component connected as a whole. The connecting portion is provided on the second connecting component, and the first connecting component is provided with a connecting structure for connecting with the component to be driven.

[0021] The present invention also provides a coordinate measuring machine, which includes the above flexible belt transmission device. The component to be driven is connected to the linear motion component of the coordinate measuring machine, so as to realize the motion transmission of the flexible belt transmission device to the linear motion component of the coordinate measuring machine.

[0022] Compared with the prior art, the present invention has the following advantages and positive effects:

[0023] 1. For the flexible belt transmission device of the present invention, a flexible connection mechanism is arranged on the transmission belt. The transmission belt and the component to be driven are connected through the flexible connection mechanism, and the flexible connection mechanism can absorb the vibration and impact energy of the transmission belt, so that the transmission is more stable.

[0024] 2. When the flexible belt transmission device of the present invention is applied to a coordinate measuring machine, the influence of the vibration of the transmission device on the measuring system can be weakened, and the measuring accuracy of the coordinate measuring machine can be improved. Description of the Drawings

[0025] 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 use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the flexible belt transmission device in the embodiment of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the flexible connection mechanism in the embodiment of the present invention;

[0028] Figure 3 It is a schematic connection structural diagram of the first floating connecting member, the second floating connecting member, the connecting portion, the guide rod and the elastic member in the embodiment of the present invention;

[0029] Figure 4 For Figure 3Schematic cross-sectional structure diagram.

[0030] Reference numerals: 100, drive motor; 200, driving pulley; 300, driven pulley; 400, transmission belt; 410, first joint end; 420, second joint end; 500, flexible connection mechanism; 510, component connection part to be driven; 511, first connection component; 512, second connection component; 513, connection structure; 520, first floating connecting piece; 521, first connecting piece body; 522, first pressing plate; 523, convex part; 530, second floating connecting piece; 531, second connecting piece body; 532, second pressing plate; 540, spring; 550, connecting part; 551, through part; 552, first limiting groove; 553, second limiting groove; 560, guide rod; 570, guide rod fixing block; 571, annular limiting flange; 580, limiting groove; 590, connecting block. Detailed implementation manners

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In addition, the technical features involved in different implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Referring to Figure 1 and Figure 2 , a flexible belt drive device in this embodiment includes a drive motor 100, a driving pulley 200, a driven pulley 300, a transmission belt 400, and a flexible connection mechanism 500.

[0034] The driving pulley 200 is installed on the output end of the drive motor 100. The transmission belt 400 is in transmission connection with the driving pulley 200 and the driven pulley 300. When the drive motor 100 works, it drives the driving pulley 200 to rotate, and then drives the transmission belt 400 and the driven pulley 300 to rotate. The transmission belt 400 has a first joint end 410 and a second joint end 420.

[0035] The flexible connection mechanism 500 includes a component connection part 510 for the component to be driven, a first floating connection part 520, a second floating connection part 530, and an elastic component; the first floating connection part 520 is fixedly connected to the first joint end 410, the second floating connection part 530 is fixedly connected to the second joint end 420, and the first floating connection part 520 and the second floating connection part 530 are connected as a whole, that is, the first joint end 410 and the second joint end 420 of the transmission belt 400 are connected as a whole through the first floating connection part 520 and the second floating connection part 530, so that the transmission belt 400 can maintain a closed-loop structure.

[0036] The component connection part 510 for the component to be driven is used to connect the entire flexible belt transmission device to the component to be driven in motion, so as to transmit the motion of the transmission belt 400 to the component to be driven in motion. A connection part 550 is formed on the component connection part 510 for the component to be driven. The first floating connection part 520 and the second floating connection part 530 are respectively located on opposite sides of the connection part 550, and the first floating connection part 520 and the second floating connection part 530 are respectively separated from the connection part 550 by a certain distance and do not contact each other. The above-mentioned elastic components are provided between the first floating connection part 520 and the connection part 550 and between the second floating connection part 530 and the connection part 550. The elastic components are in a compressed state, and the direction of their elastic deformation is along the length direction of the transmission belt 400 in the section where they are located.

[0037] The flexible belt transmission device of the present utility model realizes the flexible and elastic connection between the transmission belt 400 and the component to be driven in motion. During the operation of the flexible belt transmission device, the vibration of the transmission belt 400 caused by the vibration of the driving motor 100, or the vibration of the transmission belt 400 itself during the transmission process, will be transmitted to the first floating connection part 520 and the second floating connection part 530, resulting in the vibration of the first floating connection part 520 and the second floating connection part 530; since the first floating connection part 520 and the connection part 550 do not contact each other, and the second floating connection part 530 and the connection part 550 do not contact each other, and elastic components are provided between the first floating connection part 520 and the connection part 550 and between the second floating connection part 530 and the connection part 550, the vibration of the first floating connection part 520 and the second floating connection part 530 will be absorbed by the elastic components during the process of being transmitted to the connection part 550, and the connection part 550 will not vibrate or only vibrate slightly. Furthermore, the component to be driven in motion connected to the component connection part 510 for the component to be driven will not vibrate or only vibrate slightly, making the transmission motion smoother and improving the motion accuracy.

[0038] In some embodiments of the present utility model, multiple elastic components are arranged in parallel between the first floating connection part 520 and the connection part 550, and multiple elastic components are arranged in parallel between the second floating connection part 530 and the connection part 550 to improve the buffering performance and thus improve the vibration absorption ability.

[0039] Specifically, taking the example of arranging two elastic components in parallel between the first floating connecting member 520 and the connecting portion 550 shown in Figure 2 , the two elastic components are arranged at intervals in the width direction of the transmission belt 400 so that the two elastic components can act together to absorb vibration; the multiple elastic components between the second floating connecting member 530 and the connecting portion 550 are arranged in the same way. Of course, the number of elastic components is not specifically limited and is determined according to the specific working conditions of the flexible belt transmission device.

[0040] Referring to Figure 3 , and at the same time combining Figure 2 , in some embodiments of the present invention, the first floating connecting member 520 and the second floating connecting member 530 are connected into one body through a connecting block 590 therebetween. The connecting block 590 can be an integral structure with the first floating connecting member 520 and the second floating connecting member 530, that is, the three are an integral structure and are integrally formed as a whole, or the three are independent components and are connected into one body by welding, and no specific limitation is made here.

[0041] Referring to Figure 4 , and at the same time combining Figure 2 and Figure 3 , in some embodiments of the present invention, a through portion 551 is provided on the connecting portion 550, and the first floating connecting member 520 and the second floating connecting member 530 are fixedly connected by a guide rod 560; the guide rod 560 passes through the through portion 551, and its two ends are respectively located on opposite sides of the connecting portion 550. The diameter of the through portion 551 is greater than the diameter of the guide rod 560 so that the guide rod 560 does not contact the through portion 551, and further the guide rod 560 does not contact the connecting portion 550, the first floating connecting member 520 does not contact the connecting portion 550, and the second floating connecting member 530 does not contact the connecting member; the elastic component is a spring 540 sleeved on the guide rod 560. The two ends of the spring 540 between the first floating connecting member 520 and the connecting portion 550 respectively abut against the first floating connecting member 520 and the connecting portion 550, and the two ends of the spring 540 between the second floating connecting member 530 and the connecting portion 550 respectively abut against the second floating connecting member 530 and the connecting portion 550.

[0042] Then the guide rod 560 can not only improve the integrity of the first floating connecting member 520 and the second floating connecting member 530, but also guide the deformation of the spring 540; in addition, the guide rod 560 passes through the through portion 551 of the connecting portion 550 to connect the first floating connecting member 520 and the second floating connecting member 530 into one body, and can also prevent the first floating connecting member 520 and the second floating connecting member 530 from detaching from the connecting portion 550.

[0043] For the fixed connection between the guide rod 560 and the first floating connecting member 520 and the second floating connecting member 530, such asFigure 3 As shown, guide rods 560 are fixedly connected to a guide rod fixing block 570 at both ends respectively, and are fixedly connected to the first floating connecting member 520 and the second floating connecting member 530 through the guide rod fixing blocks 570 at both ends respectively.

[0044] As a specific implementation, taking the perspective shown in Figure 4 as an example, the guide rod 560 is a cylindrical rod, the guide rod fixing block 570 is in the shape of a cylindrical tube, a circular limiting flange 571 is formed on the outer wall of the guide rod fixing block 570, and the left and right ends of the guide rod 560 are inserted and fixed in the central holes of the left and right guide rod fixing blocks 570; a limiting groove 580 adapted to the left end of the left guide rod fixing block 570 is formed on the first floating connecting member 520, the left end of this guide rod fixing block 570 is embedded in the limiting groove 580 of the first floating connecting member 520 and fixedly connected to the limiting groove 580, and the limiting flange 571 of the left guide rod fixing block 570 abuts against the first connecting member body 521; a limiting groove 580 adapted to the right end of the right guide rod fixing block 570 is formed on the second floating connecting member 530, the right end of this guide rod fixing block 570 is embedded in the limiting groove 580 of the second floating connecting member 530 and fixedly connected to the limiting groove 580, and the limiting flange 571 of the right guide rod fixing block 570 abuts against the second connecting member body 531.

[0045] Both ends of the spring 540 between the first floating connecting member 520 and the connecting portion 550 abut against the circular limiting flange 571 of the left guide rod fixing block 570 and the connecting portion 550 respectively, and both ends of the spring 540 between the second floating connecting member 530 and the connecting portion 550 abut against the circular limiting flange 571 of the right guide rod fixing block 570 and the connecting portion 550 respectively.

[0046] For the fixed connection between the two ends of the guide rod 560 and the guide rod fixing block 570, and the fixed connection between the guide rod fixing block 570 and the limiting groove 580, interference fit connection can be adopted. Of course, other connection methods can also be adopted, such as welding or thread screwing, and no specific restrictions are required.

[0047] Furthermore, first limiting grooves 552 and second limiting grooves 553 communicating with the through portion 551 are respectively formed on the opposite side surfaces of the connecting portion 550. The first limiting grooves 552 and the second limiting grooves 553 are coaxial with the through portion 551 and their inner diameters are larger than the diameter of the through portion 551; one end of the spring 540 between the first floating connecting member 520 and the connecting portion 550 is positioned in the first limiting groove 552, and one end of the spring 540 between the second floating connecting member 530 and the connecting portion 550 is positioned in the second limiting groove 553, which can further limit and position the spring 540 to prevent the spring 540 from moving and causing the drive belt 400 to shake.

[0048] In some embodiments of the present utility model, the drive belt 540 is a multi-wedge belt. Compared with a synchronous belt, the multi-wedge belt has no tooth meshing, can transmit a larger power, has less vibration and operates smoothly, which can improve the transmission consistency. When the flexible belt drive device is applied to a coordinate measuring machine, it can not only improve the measurement accuracy of the coordinate measuring machine, but also the transmission consistency of the multi-wedge belt helps to improve the scanning performance of the coordinate measuring machine.

[0049] For convenient connection, as Figure 2 and Figure 3 shown, the first floating connector 520 includes a first connector body 521 and a first pressing plate 522. The first pressing plate 522 is in alignment with the first connector body 521 and is detachably connected, clamping the first joint end 410 between the first connector and the first pressing plate 522.

[0050] Similarly, the second floating connector 530 includes a second connector body 531 and a second pressing plate 532. The second pressing plate 532 is in alignment with the second connector body 531 and is detachably connected, clamping the second joint end 420 between the second connector and the second pressing plate 532.

[0051] Specifically, the first connector body 521 and the first pressing plate 522 are respectively attached to the outer side and the inner side of the first joint end 410, and the three can be detachably connected into one body by screwing; the second connector body 531 and the second pressing plate 532 are respectively attached to the outer side and the inner side of the second joint end 420, and the three can be detachably connected into one body by screwing. With this structural form, it is convenient to connect the first floating connector 520, the second floating connector 530 and the drive belt 400, thus facilitating disassembly, maintenance or replacement.

[0052] Furthermore, a convex portion 523 is provided on the first connector body 521 and / or the first pressing plate 522, and a convex portion is also provided on the second connector body 531 and / or the second pressing plate 532. As Figure 2 shown, taking the first pressing plate 522 and the second pressing plate 532 provided with the convex portion 523 as an example for illustration, the convex portion 523 on the first pressing plate 522 is specifically provided on the surface of the first pressing plate 522 that is opposite to the first connector body 521, and the convex portion on the second pressing plate 532 is specifically provided on the surface of the second pressing plate 532 that is opposite to the second connector body 531. By providing the convex portion 523, the friction between the first floating connector 520 and the first joint end 410, and between the second floating connector 530 and the second joint end 420 can be respectively increased, thereby improving the connection reliability with the two joint ends of the drive belt.

[0053] Preferably, the first floating connecting member 520 and the second floating connecting member 530 are symmetrically arranged. The connecting block 590 connects the first connecting member body 521 and the second connecting member body 531 into one body, thereby connecting the first floating connecting member 520 and the second floating connecting member 530 into one body.

[0054] For the connecting component 510 of the component to be driven, such as Figure 2 and Figure 3 as shown, it includes a first connecting component 511 and a second connecting component 512 connected into one body. The connecting portion 550 is provided on the second connecting component 512. The connecting portion 550 can be welded to the second connecting member or formed integrally therewith, or connected into one body by other structures; a connecting structure 513 for connecting with the component to be driven is provided on the first connecting component 511.

[0055] By setting the connecting component 510 of the component to be driven as a split structure, on the one hand, it is convenient to process each component into a shape convenient for assembly, such as Figure 2 as shown, the first connecting component 511 and the second connecting component 512 are respectively processed into L-shaped blocks; on the other hand, it is convenient to disassemble, install and replace each component separately, reducing the maintenance cost.

[0056] The first connecting component 511 and the second connecting component 512 can be connected by bolts; the connecting structure 513 on the first connecting component 511 for connecting with the component to be driven can also be a screw connection structure, and specific limitations are not made here.

[0057] In some embodiments of the present invention, a coordinate measuring machine is also proposed, such as a bridge-type machine, including a flexible belt transmission device. For the flexible belt transmission device, refer to the embodiments and appendices of the flexible belt transmission device of the present invention Figures 1 to 4 for the description, which will not be elaborated here.

[0058] The connecting component 510 of the component to be driven of the flexible belt transmission device is connected to the linear motion component of the coordinate measuring machine, so as to realize the motion transmission of the flexible belt transmission device to the linear motion component (i.e., the above-mentioned component to be driven) of the coordinate measuring machine.

[0059] For the coordinate measuring machine, the linear motion component can be the Z-axis carriage of the coordinate measuring machine. The Z-axis carriage is slidably arranged along the X direction on the cross beam of the coordinate measuring machine. The driving motor 100 and the driven pulley 300 are arranged on the cross beam. The Z-axis carriage drives the Z-axis and the probe to reciprocate linearly along the X direction on the cross beam through the flexible belt transmission device in the embodiment of the present invention.

[0060] Since the flexible belt transmission device in the embodiment of the present invention can absorb the vibration of the transmission belt 400, making the motion transmission stable, the impact of the vibration on the Z-axis and the probe of the measuring machine can be reduced, which is beneficial to improving the detection accuracy of the measuring machine.

[0061] Of course, the linear motion component of the coordinate measuring machine can also be the Y-direction motion component. For example, the column supporting the cross beam reciprocates linearly along the Y direction on the measuring table under the drive of the flexible belt drive device.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible belt drive device, characterized in that, Comprising: A drive motor; A driving pulley mounted on the output end of the drive motor; A driven pulley; A transmission belt in transmission connection with the driving pulley and the driven pulley, the transmission belt having a first joint end and a second joint end; A flexible connection mechanism including a component connection part to be driven, a first floating connection part, a second floating connection part, and an elastic component in a compressed state; the first floating connection part is fixedly connected to the first joint end, the second floating connection part is fixedly connected to the second joint end, and the first floating connection part and the second floating connection part are connected as a whole; a connection part is formed on the component connection part to be driven, the first floating connection part and the second floating connection part are respectively located on opposite sides of the connection part and are both spaced apart from the connection part by a certain distance, and elastic components are provided between the first floating connection part and the connection part and between the second floating connection part and the connection part.

2. The flexible belt transmission device according to claim 1, characterized in that Multiple elastic components are arranged in parallel between the first floating connection part and the connection part, and multiple elastic components are arranged in parallel between the second floating connection part and the connection part.

3. The flexible belt transmission device according to claim 1, characterized in that A through hole is provided on the connection part, and the first floating connection part and the second floating connection part are fixedly connected by a guide rod; the guide rod passes through the through hole, and the diameter of the through hole is larger than the diameter of the guide rod so that the guide rod does not contact the through hole; the elastic component is a spring sleeved on the guide rod, and both ends of the spring between the first floating connection part and the connection part are respectively abutted against the first floating connection part and the connection part, and both ends of the spring between the second floating connection part and the connection part are respectively abutted against the second floating connection part and the connection part.

4. The flexible belt transmission device according to claim 3, characterized in that First limiting grooves and second limiting grooves communicating with the through hole are respectively formed on opposite side surfaces of the connection part, the first limiting grooves and the second limiting grooves are coaxial with the through hole and their inner diameters are larger than the diameter of the through hole; one end of the spring between the first floating connection part and the connection part is positioned in the first limiting groove, and one end of the spring between the second floating connection part and the connection part is positioned in the second limiting groove.

5. The flexible belt transmission device according to claim 1, characterized in that The transmission belt is a multi-wedge belt.

6. The flexible belt transmission device according to any one of claims 1 to 5, characterized in that The first floating connection part includes a first connection part body and a first pressing plate, the first pressing plate is in alignment and detachably connected with the first connection part body, and the first joint end is clamped between the first connection part and the first pressing plate; The second floating connection part includes a second connection part body and a second pressing plate, the second pressing plate is in alignment and detachably connected with the second connection part body, and the second joint end is clamped between the second connection part and the second pressing plate.

7. The flexible belt transmission device according to claim 6, wherein a convex portion is provided on the first connecting member body and / or the first pressing plate, and a convex portion is also provided on the second connecting member body and / or the second pressing plate.

8. The flexible belt transmission device according to claim 6, wherein the first floating connecting member and the second floating connecting member are symmetrically arranged.

9. The flexible belt transmission device according to claim 1, wherein the component for connecting the piece to be driven includes a first connecting component and a second connecting component connected as a whole, the connecting portion is provided on the second connecting component, and a connecting structure for connecting with the piece to be driven is provided on the first connecting component.

10. A coordinate measuring machine, characterized in that it includes the flexible belt transmission device according to any one of claims 1 to 9, and the component for connecting the piece to be driven is connected to the linear motion component of the coordinate measuring machine, so as to realize the motion transmission of the flexible belt transmission device to the linear motion component of the coordinate measuring machine.

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