Damping transmission mechanism for three-coordinate measuring machine
By using shock-absorbing components to fit the synchronous belt in a coordinate measuring machine, and combining this with the design of guide wheels and fixing components, the vibration problem in the synchronous belt drive process is solved, improving measurement accuracy and stability.
Patent Information
- Application Number
- CN202520230709.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Synchronous belts are prone to vibration during the transmission process of coordinate measuring machines, which affects measurement accuracy, especially under long stroke conditions where the vibration is more severe.
The system uses shock-absorbing components that fit into the timing belt, and guide wheels to tension the timing belt, reducing vibration. The combined design of fixed components and guide wheels stabilizes the movement of the timing belt.
This reduces vibration of the timing belt and improves the measurement accuracy and movement stability of the coordinate measuring machine.
Smart Images
Figure CN223923723U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to three coordinate measuring device technical field, concretely relates to a shock attenuation transmission mechanism for three coordinate measuring machine. BACKGROUND
[0002] Three coordinate measuring machine is a kind of precision measuring equipment, for accurately determining the geometric characteristics of object in three-dimensional space, such as size, shape, angle and position parameter etc.Three coordinate measuring machine measurement process is as follows: the workpiece to be measured is placed on the platform, the motion system of three coordinate measuring machine drives probe to move until contacting with workpiece, then records the position of contact point when probe contacts with workpiece, and then realizes the measurement of workpiece.
[0003] In related art, three coordinate measuring machine motion system includes X-axis drive structure, Y-axis drive structure and Z-axis drive structure, for driving probe and marble platform to move relatively in mutually perpendicular X, Y and Z three directions respectively.Part of Y-axis drive structure is driven by synchronous belt, specifically, Y-axis drive structure includes synchronous belt and synchronous pulley, synchronous belt is arranged along Y-axis direction, synchronous pulley is fixed on column and is engaged with synchronous belt, by driving synchronous pulley to rotate, to change the position of synchronous pulley on synchronous belt, and then control the movement of column in Y-axis direction.
[0004] However, synchronous belt is prone to vibration in transmission process, which is not conducive to the stable movement of column.Especially for three coordinate measuring machine with large stroke, the vibration of longer synchronous belt will be more intense, which seriously affects the measurement accuracy of three coordinate measuring machine. UTILITY MODEL CONTENTS
[0005] The utility model mainly solves the problem that synchronous belt is prone to vibration in transmission process.
[0006] In one embodiment, a shock attenuation transmission mechanism for three coordinate measuring machine is provided, including guide rail, to-be-driven component, synchronous belt, synchronous pulley and shock attenuation piece, the guide rail is fixed on mounting base, the guide rail is used to guide the to-be-driven component;The synchronous belt includes two fixed parts arranged at intervals along its length direction, the meshing part between the two fixed parts, the fixed part is fixedly connected with the mounting base, the meshing part has a tooth surface and a back surface located on the opposite side of the tooth surface;The synchronous pulley is fixedly connected with the to-be-driven component, and the synchronous pulley is engaged with the tooth surface of the synchronous belt, and the synchronous pulley can be driven to rotate by driving member to move along the synchronous belt;The shock attenuation piece is arranged on the mounting base, and the shock attenuation piece is located on one side of the synchronous belt and is attached to the synchronous belt to weaken the vibration of the synchronous belt.
[0007] In some embodiments, the damping member is arranged along the length direction of the synchronous belt, and two ends of the damping member are fixed with the two fixed portions of the synchronous belt respectively.
[0008] In some embodiments, the damping transmission mechanism for the coordinate measuring machine comprises a fixing assembly, the fixing assembly comprises a bracket and a clamping block, one end of the bracket is fixedly connected with the mounting base, the other end of the bracket is provided with a supporting portion, the damping member and the synchronous belt are arranged on the supporting portion, and the clamping block is fixedly connected with the supporting portion to clamp and fix the fixed portion of the synchronous belt and the end portion of the damping member.
[0009] In some embodiments, one side of the damping member which is in contact with the synchronous belt is provided with a tooth pattern, the tooth pattern is matched with the toothed surface of the synchronous belt, and the damping member is engaged with the synchronous belt through the tooth pattern.
[0010] In some embodiments, the damping transmission mechanism for the coordinate measuring machine comprises at least one guide wheel, the guide wheel is arranged on the to-be-driven component, and the outer periphery of the guide wheel is in contact with the back surface of the synchronous belt to change the direction of the synchronous belt when the synchronous belt wheel rotates.
[0011] In some embodiments, two guide wheels are arranged, and the two guide wheels are respectively located on the opposite sides of the synchronous belt wheel.
[0012] In some embodiments, the to-be-driven component comprises a fixed plate, the synchronous belt wheel and the guide wheel are arranged on the fixed plate, and the position of the guide wheel on the fixed plate can be adjusted to tension the synchronous belt.
[0013] In some embodiments, a long hole is arranged on the fixed plate, a rotating shaft of the guide wheel is arranged in the long hole, and the position of the rotating shaft in the long hole can be adjusted.
[0014] In some embodiments, the guide wheel comprises a wheel periphery and a rolling shaft, the wheel periphery can rotate around the rolling shaft, the rolling shaft is provided with an eccentric shaft, the eccentric shaft is rotationally connected with the fixed plate, and an elastic member is further arranged between the rolling shaft and the fixed plate, the elastic member applies an elastic force to the rolling shaft and can drive the rolling shaft to rotate around the eccentric shaft to adjust the position of the wheel periphery on the fixed plate and adaptively tension the synchronous belt.
[0015] In some embodiments, the outer diameter of the middle portion of the guide wheel is greater than the outer diameter of the edge.
[0016] According to the damping transmission mechanism for a three-coordinate measuring machine in the above embodiment, the driving member can drive the synchronous pulley to rotate so as to move the synchronous pulley along the synchronous belt, and in turn drive the to-be-driven component to move along the guide rail; the damping member is attached to the synchronous belt and can weaken the vibration of the synchronous belt during transmission. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The application scenario diagram of the damping transmission mechanism for a three-coordinate measuring machine of the present application;
[0018] Figure 2 The overall view of the damping transmission mechanism for a three-coordinate measuring machine of the present application;
[0019] Figure 3 The enlarged view of the A part in the middle; Figure 2 The enlarged view of the B part in the middle;
[0020] Figure 4 The enlarged view of the B part in the middle; Figure 2 The enlarged view of the B part in the middle;
[0021] Figure 5 The schematic diagram of the guide wheel of the damping transmission mechanism for a three-coordinate measuring machine of the present application in the first state;
[0022] Figure 6 The schematic diagram of the guide wheel of the damping transmission mechanism for a three-coordinate measuring machine of the present application in the second state.
[0023] REFERENCE SIGNS:
[0024] 100, three-coordinate measuring machine; 11, measuring head; 12, X-axis driving structure; 13, Y-axis driving structure; 14, Z-axis driving structure; 15, mounting base body; 16, to-be-driven component; 161, fixed plate; 1611, stop block; 2, guide rail; 3, long hole; 4, synchronous belt; 41, fixed part; 42, meshing part; 421, tooth surface; 422, back surface; 5, synchronous pulley; 6, damping member; 7, fixing assembly; 71, support; 711, bearing part; 72, clamping block; 73, pad block; 8, guide wheel; 81, wheel circumference part; 82, roller; 83, eccentric shaft; 84, baffle; 9, elastic member. DETAILED DESCRIPTION
[0025] The utility model will be further described in detail below with specific embodiments and drawings. Similar elements in different embodiments are marked with similar element numbers. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases or replaced by other elements, materials or methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art, who can fully understand the related operations according to the description in the specification and general technical knowledge in the art.
[0026] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that can be easily recognized by those skilled in the art. Therefore, the various sequences in the specification and drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the sequence is necessary, unless otherwise stated that a certain sequence must be followed.
[0027] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.
[0028] Part of the driving structure of the three-coordinate measuring machine adopts synchronous belt transmission, and the synchronous belt is prone to vibration during transmission, which causes the driven part to move unstably, thereby affecting the measurement accuracy of the three-coordinate measuring machine.
[0029] Therefore, the synchronous belt can be considered to be arranged on the damping member, and the damping member is attached to the synchronous belt, which can suppress the vibration of the synchronous belt. On the other hand, the synchronous belt is prone to vibration when it is loose, and a guide wheel can also be considered to be arranged to tension the synchronous belt to weaken the vibration of the synchronous belt.
[0030] Please refer to Figure 1 The three-coordinate measuring machine 100 includes a probe 11 and an X-axis driving structure 12, a Y-axis driving structure 13 and a Z-axis driving structure 14 for moving the probe 11. The damping transmission mechanism for the three-coordinate measuring machine of the utility model can be applied to the X-axis driving structure 12, the Y-axis driving structure 13 and the Z-axis driving structure 14 of the three-coordinate measuring machine 100.
[0031] Please refer to Figure 2 and Figure 3In one embodiment, a damping transmission mechanism for a three-coordinate measuring machine is provided, which comprises a guide rail 2, a to-be-driven component 16, a synchronous belt 4, a synchronous belt wheel 5 and a damping member 6.
[0032] The guide rail 2 is fixed on a mounting base 15, and the guide rail 2 is used for guiding the to-be-driven component 16. When the transmission mechanism is used for a Y-axis driving structure of the three-coordinate measuring machine, the guide rail 2 is arranged along the direction of the Y-axis 13, and the mounting base 15 can be a marble platform, and the to-be-driven component 16 can be a column.
[0033] The synchronous belt 4 comprises two fixed parts 41 arranged at intervals along the length direction of the synchronous belt 4, and a meshing part 42 located between the two fixed parts 41. The fixed parts 41 are fixedly connected with the mounting base 15. In this embodiment, the two fixed parts 41 of the synchronous belt 4 are located at the two ends of the synchronous belt 4, and the synchronous belt 4 is fixed with the mounting base 15 through the fixed parts 41 at the two ends.
[0034] The meshing part 42 has a toothed surface 421 and a back surface 422 located on the opposite side of the toothed surface 421. The toothed surface 421 of the meshing part 42 is provided with a plurality of clamping teeth, and the clamping teeth are engaged with the synchronous belt wheel 5. The synchronous belt wheel 5 is fixedly connected with the to-be-driven component 16, and the synchronous belt wheel 5 can be driven to rotate by a driving member arranged on the to-be-driven component 16, so as to move along the synchronous belt 4. The driving member can be a motor, and a driving shaft of the driving member can be fixedly connected with the synchronous belt wheel 5 or in transmission connection with the synchronous belt wheel 5, so as to drive the synchronous belt wheel 5 to rotate, thereby enabling the synchronous belt wheel 5 to move along the synchronous belt 4, and enabling the to-be-driven component 16 to move along the guide rail 2.
[0035] The damping member 6 is fixedly arranged on the mounting base 15, and the damping member 6 is located on one side of the synchronous belt 4 and is in close contact with the synchronous belt 4, so as to weaken the vibration of the synchronous belt 4. Specifically, the damping member 6 can be located on the side of the toothed surface 421 of the synchronous belt 4. When the synchronous belt 4 vibrates during transmission, the damping member 6 is in close contact with the synchronous belt 4, so as to hinder the vibration of the synchronous belt 4, thereby reducing the vibration of the synchronous belt 4.
[0036] The damping member 6 can be made of hard material or soft material. For the damping member 6 made of soft material, the damping member 6 can also absorb the vibration of the synchronous belt 4, thereby also reducing the vibration. After the vibration of the synchronous belt 4 is reduced, the movement of the to-be-driven component 16 is more stable, which is beneficial to improving the measurement accuracy of the three-coordinate measuring machine.
[0037] In some embodiments, referring to Figure 4 , the damping member 6 is arranged along the length direction of the synchronous belt 4, and the two fixed parts 41 of the synchronous belt 4 are fixed with the two ends of the damping member 6, respectively. After the two fixed parts 41 of the synchronous belt 4 at the two ends are fixed with the damping member 6, the damping member 6 is in better close contact with the synchronous belt 4, which is beneficial to improving the damping effect.
[0038] The fixing mode of the synchronous belt 4 and the damping member 6 can be various, for example, directly fixed by fasteners such as fastening screws. Or clamped and fixed by the fixing assembly 7. Specifically, the fixing assembly 7 includes a bracket 71 and a clamping block 72. One end of the bracket 71 is fixedly connected with the mounting base 15 by fasteners, and the other end of the bracket 71 is provided with a bearing portion 711. The damping member 6 can be fixed on the bearing portion 711 by fastening screws, and the synchronous belt 4 is arranged on the damping member 6.
[0039] Referring to Figure 2 , the fixing assembly 7 can include a plurality of brackets 71, and the damping member 6 is laid on the plurality of brackets 71. The damping member 6 can be composed of a plurality of damping sections, and the two ends of the damping sections are respectively fixed on the adjacent brackets 71.
[0040] The clamping block 72 can be an L-shaped clamping block. The clamping block 72 and the bearing portion 711 can be fixed by screws, and the fixed part 41 of the synchronous belt 4 and the end part of the damping member 6 are clamped and fixed. A pad 73 can also be provided between the clamping block 72 and the synchronous belt 4. The pad 73 makes the clamping of the damping member 6 and the synchronous belt 4 more firm. The pad 73 can be made of flexible material.
[0041] In some embodiments, referring to Figure 4 , the side of the damping member 6 that is in contact with the synchronous belt 4 is provided with a tooth pattern, which is matched with the toothed surface 421 of the synchronous belt 4, and the damping member 6 is engaged with the synchronous belt 4 through the tooth pattern. By providing the tooth pattern on the damping member 6, the damping member 6 is more closely attached to the synchronous belt 4, and the damping effect of the damping member 6 on the synchronous belt 4 is better.
[0042] In some embodiments, referring to Figure 2 and Figure 3 , the damping transmission mechanism for the three-coordinate measuring machine includes at least one guide wheel 8, which is arranged on the to-be-driven part 16. The outer periphery of the guide wheel 8 is in contact with the back surface 422 of the synchronous belt 4 and can rotate along the back surface 422 of the synchronous belt 4 to change the direction of the synchronous belt 4.
[0043] The guide wheel 8 can be provided with two, and the two guide wheels 8 are respectively located on the opposite sides of the synchronous pulley 5. The provision of two guide wheels 8 facilitates the movement of the synchronous pulley 5 in two directions along the synchronous belt 4. In addition, the provision of the synchronous pulley 5 can also play a role in tensioning the synchronous belt 4, which is conducive to reducing the vibration of the synchronous belt 4.
[0044] In some embodiments, referring to Figure 4The driving component 16 comprises a fixed plate 161, and the synchronous pulley 5 and the guide wheel 8 are arranged on the fixed plate 161. The position of the guide wheel 8 on the fixed plate 161 can be adjusted to adjust the tension of the synchronous belt 4. For the case of arranging two guide wheels 8 as described above, the distance between the two guide wheels 8 can be adjusted by adjusting the position of the guide wheel 8, and then the tension of the synchronous belt 4 is adjusted.
[0045] In some embodiments, a long hole 3 is arranged on the fixed plate 161, the rotating shaft of the guide wheel 8 is arranged in the long hole 3, and the position of the rotating shaft in the long hole 3 can be adjusted. Specifically, the rotating shaft of the guide wheel 8 can be fixed on the hole wall of the long hole 3 by a fastener such as a nut, and when it is necessary to adjust the position of the rotating shaft in the long hole 3, the nut can be loosened for adjustment.
[0046] In other embodiments, a plurality of fixing holes are arranged on the fixed plate 161, and each fixing hole has a different distance from the synchronous pulley 5. The position of the rotating shaft of the guide wheel 8 can be adjusted by being arranged in different fixing holes.
[0047] In some embodiments, please refer to Figure 5 and Figure 6 The guide wheel 8 comprises a wheel circumference 81 and a roller shaft 82, the wheel circumference 81 can rotate around the roller shaft 82, the roller shaft 82 is arranged with an eccentric shaft 83, the eccentric shaft 83 is rotationally connected with the fixed plate 161, and the roller shaft 82 is further arranged with an elastic member 9 between the roller shaft 82 and the fixed plate 161. The elastic member 9 exerts an elastic force on the roller shaft 82 and can drive the roller shaft 82 to rotate around the eccentric shaft 83 to adjust the position of the wheel circumference 81 on the fixed plate 161 to adaptively tension the synchronous belt 4.
[0048] Specifically, the elastic member 9 can be a spring, the fixed plate 161 is arranged with a stop block 1611, the roller shaft 82 is fixed with a stop plate 84, one end of the spring is abutted against the stop block 1611, and the other end is abutted against the stop plate 84. In other embodiments, the elastic member 9 can also be a spring piece, an elastic rope, etc.
[0049] When the synchronous belt 4 is normally working, as shown in Figure 4 , the roller shaft 82 of the guide wheel 8 is simultaneously subjected to the torque exerted by the elastic member 9 and the synchronous belt 4, and is in a balanced state. When the synchronous belt 4 is relaxed, as shown in Figure 5 , the torque exerted by the synchronous belt 4 is reduced, the elastic member 9 can be elongated and drive the roller shaft 82 to rotate, and then the synchronous belt 4 is tensioned. After the synchronous belt 4 is tensioned, the torque exerted by the synchronous belt 4 and the torque exerted by the elastic member 9 are again in a balanced state.
[0050] In some embodiments, the outer diameter of the middle part of the guide wheel 8 is larger than the outer diameter of the edge. Specifically, the guide wheel 8 is a drum wheel, when the synchronous belt 4 is offset towards the edge of the drum wheel, due to the bulging of the middle part of the drum wheel, the synchronous belt 4 at this position has a larger tension, which can automatically correct to the middle part of the drum wheel. The guide wheel 8 is arranged as a drum wheel, which can also play a role in placing the synchronous belt 4 from deviation.
[0051] In other embodiments, the outer periphery of the guide wheel 8 can also be provided with a limiting groove, and the synchronous belt 4 is installed in the limiting groove. The limiting groove can limit the synchronous belt 4, so as to avoid the occurrence of the synchronous belt 4 deviation.
[0052] The above uses specific examples to describe the present application, which is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.
Claims
1. A damping transmission mechanism for a three-coordinate measuring machine, characterized by, The application relates to a synchronous belt driving device, which comprises a guide rail and a component to be driven, the guide rail is fixed on a mounting base, and the guide rail is used for guiding the component to be driven; a synchronous belt, which comprises two fixed parts arranged at intervals along the length direction of the synchronous belt, a meshing part between the two fixed parts, the fixed parts are fixedly connected with the mounting base, and the meshing part has a tooth surface and a back surface opposite to the tooth surface; a synchronous pulley, which is fixedly connected with the component to be driven and meshes with the tooth surface of the synchronous belt, and the synchronous pulley can be driven to rotate by a driving part to move along the synchronous belt; and a damping part, which is arranged on the mounting base and is located on one side of the synchronous belt and is in contact with the synchronous belt to weaken the vibration of the synchronous belt. The damping part is arranged along the length direction of the synchronous belt, and the two fixed parts of the synchronous belt are fixed with the two ends of the damping part respectively. The application further relates to a fixing assembly, which comprises a support and a clamping block, one end of the support is fixedly connected with the mounting base, the other end of the support is provided with a supporting part, the damping part and the synchronous belt are arranged on the supporting part, and the clamping block is fixedly connected with the supporting part to clamp and fix the fixed part of the synchronous belt and the end part of the damping part. The side of the damping part in contact with the synchronous belt is provided with a tooth, the tooth is matched with the tooth surface of the synchronous belt, and the damping part meshes with the synchronous belt through the tooth. The application further relates to at least one guide wheel, which is arranged on the component to be driven, and the outer periphery of the guide wheel is in contact with the back surface of the synchronous belt to change the direction of the synchronous belt when the synchronous pulley rotates.
2. The damping transmission mechanism for a coordinate measuring machine according to claim 1, characterized in that, The guide wheel is provided with two guide wheels, and the two guide wheels are located on the opposite sides of the synchronous pulley respectively.
3. A damping transmission mechanism for a coordinate measuring machine according to claim 2, characterized in that The component to be driven comprises a fixed plate, the synchronous pulley and the guide wheel are arranged on the fixed plate, and the position of the guide wheel on the fixed plate can be adjusted to tension the synchronous belt.
4. The damping transmission mechanism for a coordinate measuring machine according to claim 2, characterized in that, The fixed plate is provided with a long hole, the rotating shaft of the guide wheel is arranged in the long hole, and the position of the rotating shaft in the long hole can be adjusted.
5. The damping transmission mechanism for a coordinate measuring machine according to any one of claims 1 to 4, characterized in that, The guide wheel comprises a wheel periphery and a rolling shaft, the wheel periphery can rotate around the rolling shaft, the rolling shaft is provided with an eccentric shaft, the eccentric shaft is rotationally connected with the fixed plate, and an elastic part is further arranged between the rolling shaft and the fixed plate, the elastic part applies an elastic force to the rolling shaft and can drive the rolling shaft to rotate around the eccentric shaft to adjust the position of the wheel periphery on the fixed plate and to tension the synchronous belt adaptively.
6. A damping transmission mechanism for a coordinate measuring machine according to claim 5, characterized in that The outer diameter of the middle part of the guide wheel is larger than the outer diameter of the edge.
7. The damping transmission mechanism for a coordinate measuring machine according to claim 5, characterized in that, 8. A damping transmission mechanism for a coordinate measuring machine according to claim 7, characterized in that 9. A damping transmission mechanism for a three-coordinate measuring machine according to claim 7 or 8, characterized in that, 10. The damping transmission mechanism for a coordinate measuring machine according to claim 5, characterized in that,