A transmission device capable of buffering belt inertia and a measuring machine

Abstract

The utility model provides a kind of transmission device and measuring machine of buffering belt inertia, including driving motor, driving pulley, driven pulley, belt and buffer connecting assembly, belt has first joint end and second joint end;Buffer connecting assembly includes connecting module, fixed component and two sets of elastic module, connecting module includes connecting seat, first pressing plate and second pressing plate, connecting seat includes main part, first connecting part and second connecting part, first connecting part is fixedly connected with first pressing plate and first joint end is clamped in, second connecting part is fixedly connected with second pressing plate and second joint end is clamped in;Fixed component and connecting module do not contact each other;Elastic module includes spring and limit block, limit block is detachably fixed in sub through part, spring is connected between limit block and second fixed part in compression state.The utility model can buffer the inertia force formed by belt shaking in transmission process, improve the scanning performance and measurement accuracy of measuring machine.

Description

Technical Field

[0001] This utility model relates to belt drive devices, specifically to a drive device that can buffer the inertia of a belt and a measuring machine having the drive device that can buffer the inertia of a belt. Background Technology

[0002] Bridge measuring machines rely on probes continuously marking points on the surface of an object to generate digital information about the measured part. This information is then used in conjunction with powerful spatial geometric calculations. After calibration, they can achieve efficient and high-precision measurement of parts and are widely used in the machinery manufacturing industry. To further improve measurement accuracy and efficiency, the measurement method has been updated from simply marking points on the object's surface to continuously and precisely drawing lines on the surface, thus achieving a measurement method with even greater accuracy and efficiency.

[0003] However, even though air flotation is used throughout the machine body to eliminate most of the stress during the operation of the measuring machine, the inertia of the belt itself will still cause the probe to deviate in direction or detach from the surface of the object being measured when it stops or changes direction at the end of its movement. This will have a significant impact on the high precision requirements of the measuring machine.

[0004] Therefore, there is an urgent need to improve the existing belt drive system to eliminate the influence of inertia on the belt, so that it can be applied to coordinate measuring machines to ensure the measurement accuracy requirements of the measuring machine. Summary of the Invention

[0005] This invention provides a transmission device and measuring machine that can buffer the inertia of a belt, which can solve the problem in the prior art where the inertia of the belt itself affects the measurement accuracy of the measuring machine when the belt stops moving or changes direction.

[0006] To achieve the above-mentioned technical effects, the technical solution adopted by the transmission device for buffering belt inertia proposed in this utility model is as follows: A transmission device for buffering belt inertia includes a drive motor, a driving pulley, a driven pulley, a belt, and a buffer connecting assembly. The belt has a first joint end and a second joint end; the buffer connecting assembly includes: A connection module, comprising a connection seat, a first pressure plate and a second pressure plate, wherein the connection seat comprises a main body having a through portion and a first connection portion and a second connection portion located on opposite sides of the main body, the first connection portion being fixedly connected to the first pressure plate to clamp the first connector end therein, and the second connection portion being fixedly connected to the second pressure plate to clamp the second connector end therein; The fixing component is not in contact with the connecting module and includes a first fixing part and a second fixing part connected as one piece. The first fixing part is located on one side of the connecting module, and the second fixing part extends into the through part. The second fixing part divides the through part into two sub-through parts corresponding to the first connector end and the second connector end, respectively. Two sets of elastic modules are respectively disposed in the two sub-through portions. Each elastic module includes a spring and a limiting block. The limiting block is detachably fixed in the sub-through portion, and the spring is connected between the limiting block and the second fixing portion in a compressed state.

[0007] The technical solution of this utility model also includes the following additional technical features: Both the limiting block and the second fixing part have positioning structures coaxial with the spring, and the two ends of the spring are positioned by the positioning structures.

[0008] The positioning structure on the limiting block is a positioning groove, and the positioning structure on the second fixing part is a positioning protrusion.

[0009] A through hole is formed on the second fixing part, and a column is inserted through the through hole. The two ends of the column extend into the two sub-through parts respectively, forming the positioning protrusion.

[0010] A set screw is screwed onto the main body at a position corresponding to both ends of the limiting block. The set screw abuts against the end face of the limiting block. The axial direction of the set screw is perpendicular to the axial direction of the spring and also perpendicular to the axial direction of the through part.

[0011] The limiting block has a set screw limiting groove formed on each of its two end faces. The tightening end of the set screw is embedded in the set screw limiting groove. The width of the set screw limiting groove is adapted to the diameter of the set screw. The length direction of the set screw limiting groove is parallel to the axial direction of the spring. Both ends of the length direction of the set screw limiting groove pass through the limiting block.

[0012] Each of the elastic modules includes multiple springs, which are spaced apart along the width of the belt between the limiting block and the second fixing part.

[0013] The first connecting part is fastened to the first pressure plate by a plurality of first screws, the first screws being spaced away from the first connector end; The second connecting part is fastened to the second pressure plate by a plurality of second screws, the second screws being spaced away from the second connector end.

[0014] The first connecting part and / or the clamping surface of the first pressure plate are provided with a protrusion, and the second connecting part and / or the clamping surface of the second pressure plate are also provided with a protrusion.

[0015] This utility model also proposes a measuring machine, including a crossbeam and a slide, the slide being slidably mounted on the crossbeam; it also includes the aforementioned transmission device for buffering belt inertia, used to drive the slide to slide along the crossbeam; the transmission device for buffering belt inertia is mounted on the crossbeam, and the first fixing part is fixedly connected to the slide.

[0016] Compared with the prior art, the present invention has the following advantages and positive effects: 1. The present invention relates to a transmission device that can buffer the inertia of a belt. A buffer connection component is provided between the two joints of the belt. The belt and the slide of the measuring machine are connected through the buffer connection component. The spring in the buffer connection component is in a compressed state, which can buffer the inertial force generated by belt vibration during transmission, making the transmission smoother. This makes the slide of the measuring machine with the transmission device run more smoothly, improving the scanning performance and measurement accuracy of the machine. 2. The elastic module of the buffer connection assembly is located inside the through part of the connection seat. By separating the connection seat from the first pressure plate and the second pressure plate, it is easy to disassemble other components. 3. The through section can also limit the range of movement of the elastic module in the width direction of the belt, preventing accidental violent belt shaking from damaging the crossbeam; 4. The connector is a single piece, with the elastic module housed within the through section of the connector. This increases the overall rigidity of the buffer connector and facilitates the transmission of driving force. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the transmission device that can buffer the inertia of the belt in an embodiment of this utility model; Figure 2 This is a schematic diagram of the buffer connection component from one perspective in an embodiment of this utility model; Figure 3 This is a structural schematic diagram of the buffer connection component from another perspective in an embodiment of this utility model; Figure 4 This is a top view of the buffer connection assembly in an embodiment of the present invention; Figure 5 for Figure 4 AA section view; Figure 6 for Figure 5 Enlarged view of part B; Figure 7 This is an exploded structural diagram of the buffer connection component in an embodiment of the present utility model; Figure 8 This is a schematic diagram of the limiting block in an embodiment of the present invention.

[0019] Attached reference numerals: 100, drive motor; 200. Drive pulley; 300. Driven pulley; 400, belt; 410, first connector end; 420, second connector end; 500. Buffer connection assembly; 510. Fixing component; 511. First fixing part; 512. Second fixing part; 513. Mounting hole; 514. Positioning protrusion; 520. Connecting seat; 521. Main body part; 522. Through part; 523. First connecting part; 524. Second connecting part; 525. Sub-through part; 530. First pressure plate; 540. Second pressure plate; 550. Spring; 560. Limiting block; 561. Positioning groove; 562. Set screw limiting groove; 570. Set screw; 580. First screw; 590. Second screw; 5100. Protrusion. Detailed Implementation

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] This embodiment discloses a measuring machine, specifically a coordinate measuring machine (CMM), comprising a crossbeam and a carriage. An air bearing is provided between the carriage and the crossbeam, allowing the carriage to slide slidably on the crossbeam. The measuring machine also includes a transmission device that buffers the inertia of the belt. This transmission device is a belt drive, located on the crossbeam, and is used to drive the carriage to slide along the crossbeam.

[0023] Reference Figures 1 to 8In this embodiment, the transmission device that can buffer the inertia of the belt includes a drive motor 100, a driving pulley 200, a driven pulley 300, a belt 400, and a buffer connection assembly 500. The drive motor 100 and the driven pulley 300 are mounted on the crossbeam, the driving pulley 200 is mounted on the output end of the drive motor 100, and the belt 400 is connected to the driving pulley 200 and the driven pulley 300 for transmission. When the drive motor 100 is working, it drives the driving pulley 200 to rotate, which in turn drives the belt 400 and the driven pulley 300 to rotate.

[0024] The belt 400 has a first joint end 410 and a second joint end 420. The buffer connection assembly 500 connects the first joint end 410 and the second joint end 420, so that the belt 400 has a complete ring structure.

[0025] Specifically, the buffer connection assembly 500 includes a connection module, a fixing component 510, and two sets of elastic modules. The connection module includes a connection seat 520, a first pressure plate 530, and a second pressure plate 540. The connection seat 520 is an integral piece, including a main body 521 with a through portion 522 and a first connecting portion 523 and a second connecting portion 524 located on opposite sides of the main body 521. The first connecting portion 523, the main body 521, and the second connecting portion 524 are arranged sequentially along the extension direction of the belt 400. The first connecting portion 523 is fixedly connected to the first pressure plate 530 to clamp the first connector end 410 inside, and the second connecting portion 524 is fixedly connected to the second pressure plate 540 to clamp the second connector end 420 inside.

[0026] The fixing component 510 is not in contact with the connecting module and includes a first fixing part 511 and a second fixing part 512 connected as one piece. The first fixing part 511 is located on one side of the connecting module and is fixedly connected to the carriage. The second fixing part 512 extends into the through part 522 of the connecting seat 520 and divides the through part 522 into two sub-through parts 525 corresponding to the first connector end 410 and the second connector end 420, respectively. That is, one sub-through part 525 is close to the first connector end 410 of the belt 400 and the other sub-through part 525 is close to the second connector end 420 of the belt 400.

[0027] One set of elastic modules is located within a sub-through section 525, and another set of elastic modules is located within another sub-through section 525. Each elastic module includes a spring 550 and a limiting block 560. The limiting block 560 is detachably fixed within the sub-through section 525, and the spring 550 is in a compressed state connected between the limiting block 560 and the second fixing part 512. The elastic deformation direction of the spring 550 is along the length direction of the belt segment 400 in which it is located.

[0028] like Figures 3 to 6As shown, the first fixing part 511 of the fixing component 510 is located on one side of the connecting seat 520 of the connecting module, and there is also a gap a between the first fixing part 511 and the connecting seat 520, so that the first fixing part 511 does not contact the connecting seat 520; the second fixing part 512 of the fixing component 510 extends into the through part 522 of the connecting seat 520, and there is also a gap between the circumferential side of the second fixing part 512 and the inner wall of the through part 522, so that the second fixing part 512 does not contact the connecting seat 520; the fixing component 510 does not contact the first pressure plate 530 or the second pressure plate 540, thereby ensuring that the fixing component 510 and the connecting module as a whole do not contact each other, and there will be no rigid contact between the two, avoiding the inertial force of the belt 400 from being directly transmitted to the carriage through the connecting module and the fixing component 510.

[0029] In this embodiment, the inertial force of the belt 400 is transmitted to the slide in sequence through the connecting seat 520, the limiting block 560, the spring 550, and the fixing component 510. The spring 550 is in a compressed state. Through the buffering effect of the spring 550, the inertial force of the belt 400 can be weakened or even canceled, making the transmission smoother, thereby making the slide of the measuring machine run more smoothly and improving the scanning performance and measurement accuracy of the machine.

[0030] The connecting seat 520 is a single piece, and the elastic module is entirely housed within the through portion 522 of the connecting seat 520. This facilitates the assembly and disassembly of the buffer connecting component 500, thereby facilitating the connection between the belt 400 and the carriage. The through portion 522 also limits the range of movement of the elastic module in the width direction of the belt 400, preventing accidental violent shaking of the belt 400 from damaging the crossbeam. The overall placement of the elastic module within the through portion 522 of the connecting seat 520 also increases the overall rigidity of the buffer connecting component 500, which is more conducive to the transmission of driving force.

[0031] Among them, belt 400 is a multi-wedge belt. Compared with synchronous belts, multi-wedge belts do not have tooth meshing, so they can transmit more power, have less vibration, and run smoothly, which can improve the consistency of transmission. When applied to measuring machines, the transmission consistency of multi-wedge belts can also help improve the scanning performance of coordinate measuring machines.

[0032] Furthermore, the first fixing part 511 is plate-shaped, with a length and width larger than the second fixing part 512, to increase its contact area with the carriage and improve the reliability of the connection with the carriage. Specifically, the first fixing part 511 has multiple mounting holes 513 formed thereon, which are fastened to the carriage by screws. The mounting holes 513 can be elongated holes to facilitate adjustment of the installation position and make the installation more flexible.

[0033] Furthermore, both the limiting block 560 and the second fixing part 512 have positioning structures coaxial with the spring 550. The two ends of the spring 550 are positioned by the positioning structures to enhance the connection reliability between the spring 550 and the limiting block 560 and the second fixing part 512, and to prevent the spring 550 from separating from the limiting block 560 and the second fixing part 512.

[0034] like Figure 5 , Figure 6 and Figure 8 As shown, the positioning structure on the limiting block 560 is a positioning groove 561, and the positioning structure on the second fixing part 512 is a positioning protrusion 514. One end of the spring 550 is embedded in the positioning groove 561, and the other end is sleeved on the positioning protrusion 514.

[0035] The positioning protrusion 514 can be integrally formed with the second fixing part 512, or formed in other ways. In this embodiment, a through hole is formed on the second fixing part 512, and a column is inserted through the through hole. The two ends of the column extend into the two sub-through parts 525 respectively, thereby forming the positioning protrusion 514, which is convenient for processing.

[0036] The through hole between the column and the second fixing part 512 can be a transition fit to facilitate disassembly and assembly.

[0037] Regarding the detachable installation of the limiting block 560, in this embodiment, as follows: Figures 5 to 8 As shown, set screws 570 are screwed onto the main body 521 at positions corresponding to both ends of the limiting block 560. The set screws 570 press against the end face of the limiting block 560, thereby fixing the limiting block 560, which is convenient to operate. The axial direction of the set screws 570 is perpendicular to the axial direction of the spring 550 and also perpendicular to the axial direction of the through part 522.

[0038] Furthermore, set screw limiting grooves 562 are formed on both end faces of the limiting block 560, and the tightening end of the set screw 570 is embedded in the set screw limiting groove 562; the width of the set screw limiting groove 562 is adapted to the diameter of the set screw 570, the length direction of the set screw limiting groove 562 is parallel to the axial direction of the spring 550, and both ends of the length direction of the set screw limiting groove 562 penetrate the limiting block 560.

[0039] By setting the set screw limiting groove 562, the tightening end of the set screw 570 is embedded in the set screw limiting groove 562, which can prevent the limiting block 560 from rotating around the set screw 570, ensuring the fixed reliability of the limiting block 560, thereby ensuring the stable position of the spring 550 and the reliable buffering effect. The set screw limiting groove 562 is a long groove, and its length direction is parallel to the axial direction of the spring 550, so the position of the limiting block 560 can be adjusted along the axial direction of the spring 550, thereby adjusting the distance between the limiting block 560 and the second fixing part 512, and thus adjusting the preload of the spring 550 to suit different belt drive conditions.

[0040] In this embodiment, each elastic module includes multiple springs 550. These springs 550 are spaced apart along the width of the belt 400 between the limiting block 560 and the second fixing part 512. The multiple springs 550 work together to improve the cushioning effect; for example... Figure 3 , Figures 5 to 7 As shown, each elastic module includes two springs 550. Of course, the number of springs 550 is not specifically limited and depends on the specific operating conditions.

[0041] In this embodiment, the first connecting part 523 and the first pressure plate 530 are fastened together by a plurality of first screws 580, with the first screws 580 avoiding the first connector end 410; similarly, the second connecting part 524 and the second pressure plate 540 are fastened together by a plurality of second screws 590, with the second screws 590 avoiding the second connector end 420. Therefore, the connector end of the belt 400 does not require drilling, reducing installation steps.

[0042] Furthermore, a protrusion 5100 is provided on the clamping surface of the first connecting part 523 and / or the first pressure plate 530, and a protrusion 5100 is also provided on the clamping surface of the second connecting part 524 and / or the second pressure plate 540. For example... Figure 7 As shown, taking the first pressure plate 530 and the second pressure plate 540 with protrusions 5100 as an example, the protrusions 5100 of the first pressure plate 530 are specifically provided on the surface of the first pressure plate 530 that mates with the first connecting part 523, and the protrusions 5100 of the second pressure plate 540 are specifically provided on the surface of the second pressure plate 540 that mates with the second connecting part 524. By providing the protrusions 5100, the friction with the first joint end 410 and the second joint end 420 of the belt 400 can be increased respectively, thereby improving the connection reliability with the two joint ends of the belt 400.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 this utility model.

Claims

1. A transmission device capable of buffering belt inertia, characterized in that, The system includes a drive motor, a driving pulley, a driven pulley, a belt, and a buffer connection assembly. The belt has a first joint end and a second joint end. The buffer connection assembly includes: A connection module, comprising a connection seat, a first pressure plate and a second pressure plate, wherein the connection seat comprises a main body having a through portion and a first connection portion and a second connection portion located on opposite sides of the main body, the first connection portion being fixedly connected to the first pressure plate to clamp the first connector end therein, and the second connection portion being fixedly connected to the second pressure plate to clamp the second connector end therein; The fixing component is not in contact with the connecting module and includes a first fixing part and a second fixing part connected as one piece. The first fixing part is located on one side of the connecting module, and the second fixing part extends into the through part. The second fixing part divides the through part into two sub-through parts corresponding to the first connector end and the second connector end, respectively. Two sets of elastic modules are respectively disposed in the two sub-through portions. Each elastic module includes a spring and a limiting block. The limiting block is detachably fixed in the sub-through portion, and the spring is connected between the limiting block and the second fixing portion in a compressed state.

2. The transmission device capable of buffering belt inertia according to claim 1, characterized in that, Both the limiting block and the second fixing part have positioning structures coaxial with the spring, and the two ends of the spring are positioned by the positioning structures.

3. The transmission device capable of buffering belt inertia according to claim 2, characterized in that, The positioning structure on the limiting block is a positioning groove, and the positioning structure on the second fixing part is a positioning protrusion.

4. The transmission device capable of buffering belt inertia according to claim 3, characterized in that, A through hole is formed on the second fixing part, and a column is inserted through the through hole. The two ends of the column extend into the two sub-through parts respectively, forming the positioning protrusion.

5. The transmission device capable of buffering belt inertia according to claim 1, characterized in that, A set screw is screwed onto the main body at a position corresponding to both ends of the limiting block. The set screw abuts against the end face of the limiting block. The axial direction of the set screw is perpendicular to the axial direction of the spring and also perpendicular to the axial direction of the through part.

6. The transmission device capable of buffering belt inertia according to claim 5, characterized in that, The limiting block has a set screw limiting groove formed on each of its two end faces. The tightening end of the set screw is embedded in the set screw limiting groove. The width of the set screw limiting groove is adapted to the diameter of the set screw. The length direction of the set screw limiting groove is parallel to the axial direction of the spring. Both ends of the length direction of the set screw limiting groove pass through the limiting block.

7. The transmission device capable of buffering belt inertia according to claim 1, characterized in that, Each of the elastic modules includes multiple springs, which are spaced apart along the width of the belt between the limiting block and the second fixing part.

8. The transmission device capable of buffering belt inertia according to claim 1, characterized in that, The first connecting part is fastened to the first pressure plate by a plurality of first screws, the first screws being spaced away from the first connector end; The second connecting part is fastened to the second pressure plate by a plurality of second screws, the second screws being spaced away from the second connector end.

9. The transmission device capable of buffering belt inertia according to claim 8, characterized in that, The first connecting part and / or the clamping surface of the first pressure plate are provided with a protrusion, and the second connecting part and / or the clamping surface of the second pressure plate are also provided with a protrusion.

10. A measuring machine, characterized in that, It includes a crossbeam and a carriage, the carriage being slidably mounted on the crossbeam; It also includes a transmission device capable of buffering belt inertia according to any one of claims 1 to 9, for driving the carriage to slide along the crossbeam; The transmission device that can buffer the inertia of the belt is mounted on the crossbeam, and the first fixing part is fixedly connected to the slide.

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