Transmission mechanism for three-coordinate measuring machine

Abstract

The utility model relates to the technical field of three-coordinate measuring machines, in particular to a transmission mechanism for a three-coordinate measuring machine, which can directly reduce or counteract the throwing force of a lead screw, counteract the moment of force of the lead screw to a mobile station, ensure the measurement accuracy and eliminate the factors of heat influencing the measurement accuracy. Comprising a base and a moving table, the base can be fixedly arranged on a main machine frame of the three-coordinate measuring machine, the moving table is slidably installed at the top of the base through a limiting assembly, a rectangular groove is formed in the middle of the base, a driving assembly is installed in the middle of the rectangular groove of the base, and auxiliary guide assemblies are installed on the front side and the rear side of the driving assembly; the output end of the driving assembly is connected with the auxiliary guiding assembly, the output end of the auxiliary guiding assembly is connected with the limiting assembly of the moving table, and a cooling assembly is installed on the driving assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of three-coordinate measuring machines, in particular to a transmission mechanism for three-coordinate measuring machines. Background Art

[0002] The three-coordinate measuring machine is an industrial measuring instrument, which is widely used in the machinery, electronics, instrumentation, plastic and other industries. The three-coordinate measuring machine can obtain the dimensional data of the measured object, can replace a variety of surface measurement tools, and shorten the measurement time of complex measurement tasks from hours to minutes. It is one of the indispensable measuring equipment in modern industry. A three-coordinate measuring machine proposed in the prior art publication number CN218097642U includes a measuring seat, a guide groove is provided on the surface of the measuring seat, a guide rod is rotatably installed on the inner side of the guide groove through a bearing, guide blocks are sleeved on both sides of the guide rod, a limit plate is provided on the top of the guide block, a limit rod is provided on the side surface opposite to the limit plate, and a resistance block is provided on the outer end of the limit rod, a bracket is provided on one side of the top of the measuring seat, and a measuring rod is provided through the top of the bracket. However, the transmission mechanism adopts a screw transmission method. The screw is long and is placed in the air, so it will bend due to gravity. When the screw rotates at high speed, the screw itself will swing and will be directly transmitted to the driven object, causing the straightness error of the driven object's movement to increase, thereby reducing the measurement accuracy and poor practicality. During the working process, the transmission mechanism will generate a lot of heat due to the operation of the motor, which will affect the temperature of the measuring table through heat transfer, and thus affect the measurement accuracy. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a transmission mechanism for a three-coordinate measuring machine which can directly reduce or offset the swinging force of the screw, offset the torque of the screw on the moving platform, ensure measurement accuracy, and eliminate the factor of heat affecting measurement accuracy.

[0004] The utility model discloses a transmission mechanism for a three-dimensional coordinate measuring machine, comprising a base and a moving platform, the base can be fixed on a main frame of the three-dimensional coordinate measuring machine, the moving platform is slidably mounted on the top of the base through a limiting component, a rectangular groove is opened in the middle of the base, a driving component is mounted in the middle of the rectangular groove of the base, auxiliary guide components are mounted on the front and rear sides of the driving component, the output end of the driving component is connected with the auxiliary guide component, and the output end of the auxiliary guide component is connected with the limiting component of the moving platform, and a cooling component is mounted on the driving component; the moving platform is driven by the driving component, and the installation error between the lead screw and the moving platform can be compensated by the auxiliary guide component and the limiting component, so as to ensure the accuracy of the measurement data, and can ensure that after the lead screw rotates, the torque of the lead screw on the moving platform is offset, and the swinging force of the lead screw can be directly reduced or offset, so as to ensure the stability of the moving platform and the measurement accuracy, and the heat generated by the driving component is prevented from being transferred to the measuring platform through the cooling component, so as to eliminate the factor that the heat affects the measurement accuracy.

[0005] Preferably, the limit assembly includes two T-shaped sliders and two connecting plates, T-shaped limit slide grooves are symmetrically provided at the front and rear ends of the rectangular groove, and a pushing groove connected to the T-shaped limit slide groove is provided on the side wall of the rectangular groove. The T-shaped slider is slidably installed in the T-shaped limit slide groove, and the lower part of the T-shaped slider is slidably installed in the pushing groove and is fixedly connected with a connecting plate, and the front and rear ends of the lower part of the moving platform are connected to the upper part of the connecting plate by fixing bolts; the moving platform is connected to the T-shaped slider through the connecting plate, and the T-shaped slider moves in the T-shaped limit slide groove to support and limit the moving platform, thereby ensuring the stability of the moving platform during movement and reducing measurement errors.

[0006] Preferably, the auxiliary guide assembly includes two slide rails, two sliders and two T-shaped connecting rods. The two slide rails are symmetrically installed on the front and rear sides of the rectangular groove. The sliders are slidably installed on the slide rails. A T-shaped connecting rod is fixedly installed at one end of the two sliders that are away from each other. The other end of the T-shaped connecting rod is connected to the lower part of the connecting plate by a fixing bolt; the slider drives the T-shaped slider to move through the T-shaped connecting rod and the connecting plate. The slider is constrained to slide on the slide rail, which can offset the torque on the moving platform. The slider can directly reduce or offset the swinging force of the screw, thereby ensuring the stability of the moving platform and the measurement accuracy.

[0007] Preferably, the driving assembly includes a screw rod, a threaded sleeve, two support rods, a driving wheel, an electric motor, a driving wheel and a transmission belt. The screw rod is rotatably installed in the middle of the rectangular groove, the threaded sleeve is screwed on the outer wall of the screw rod, the front and rear ends of the threaded sleeve are fixedly connected to the slider through the support rod, the input end of the screw rod is equipped with a driving wheel, the left end bottom of the base is provided with an installation cavity, the motor is fixed in the installation cavity, the output end of the motor is equipped with a driving wheel, and the driving wheel and the driving wheel are connected by a transmission belt transmission; starting the motor drives the driving wheel to rotate through the driving wheel and the transmission belt, the driving wheel drives the screw rod to rotate, so that the threaded sleeve moves left and right, the threaded sleeve drives the slider to move through the support rod, and at the same time the slider drives the T-shaped slider and the moving platform to move through the T-shaped connecting rod, which can compensate for the installation error between the screw rod and the moving platform, and can compensate for the parallel error between the slide rail and the screw rod, thereby ensuring the accuracy of the measurement data.

[0008] Preferably, an I-shaped bracket is installed between the top of the slider and the bottom of the moving platform via bolts; the slider is connected to the moving platform via the I-shaped bracket, thereby increasing the connection strength between the slider and the moving platform and further ensuring the stability of the moving platform.

[0009] Preferably, the cooling component includes a bottom frame, a filter, an air pump, an air extraction pipe and two cover plates, the bottom of the installation cavity is installed with the bottom frame by bolts, the filter is installed in the middle of the bottom frame, the air extraction pump is installed on the left side wall of the base, the two cover plates are installed at the left end of the installation cavity by bolts, and the input end of the air extraction pump is connected with the cover plate through the air extraction pipe; the air extraction pump is started to extract air from the installation cavity through the air extraction pipe, so that air enters the installation cavity through the filter and then is discharged, taking away the heat of the motor when it is in use, avoiding the heat generated by the motor from being transferred to the measuring table, eliminating the factor that heat affects the measurement accuracy, and filtering the air through the filter to avoid the entry of impurities that affect the service life of the motor.

[0010] Preferably, convex slide grooves are provided at the front and rear ends of the top of the base, and convex sliders are fixedly installed at the front and rear ends of the bottom of the movable platform, and the convex slider is slidably installed in the convex slide groove; when the movable platform moves, the convex slider is driven to move in the convex slide groove, further limiting and guiding the movable platform to ensure measurement accuracy.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the mobile platform is driven by the driving component, and the installation error between the lead screw and the mobile platform can be compensated by the auxiliary guide component and the limit component to ensure the accuracy of the measurement data. It can ensure that after the lead screw rotates, the torque of the lead screw on the mobile platform is offset, and the swinging force of the lead screw can be directly reduced or offset, thereby ensuring the stability of the mobile platform and the measurement accuracy. The heat generated by the driving component is prevented from being transferred to the measuring platform through the cooling component, eliminating the factor that heat affects the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a left-side structural schematic diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0015] Figure 4 It is a left-side cross-sectional structural schematic diagram of the utility model;

[0016] Figure 5 It is a partial cross-sectional structural schematic diagram of the utility model;

[0017] Figure 6 A front structural schematic diagram of the utility model;

[0018] Markings in the attached drawings: 1. base; 2. screw rod; 3. moving platform; 4. convex slider; 5. threaded sleeve; 6. support rod; 7. slide rail; 8. slider; 9. T-shaped slider; 10. I-shaped bracket; 11. T-shaped connecting rod; 12. connecting plate; 13. driving wheel; 14. motor; 15. driving wheel; 16. transmission belt; 17. bottom frame; 18. filter screen; 19. vacuum pump; 20. vacuum pipe; 21. cover plate. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0020] Example 1

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the base 1 can be fixed on the main frame of the three-dimensional coordinate measuring machine, a rectangular groove is provided in the middle of the base 1, and T-shaped limit slide grooves are symmetrically provided at the front and rear ends of the rectangular groove, and a push groove connected to the T-shaped limit slide groove is provided on the side wall of the rectangular groove. The T-shaped slider 9 is slidably installed in the T-shaped limit slide groove, and the lower part of the T-shaped slider 9 is slidably installed in the push groove and fixedly connected with a connecting plate 12. The front and rear ends of the lower part of the moving platform 3 are connected to the upper part of the connecting plate 12 by fixing bolts, and two slide rails 7 are symmetrically installed on the front and rear sides of the rectangular groove, and the slider 8 is slidably installed on the slide rail 7. The ends of the two sliders 8 that are away from each other are fixedly installed with A T-shaped connecting rod 11, the other end of which is connected to the lower part of the connecting plate 12 by a fixing bolt, the screw rod 2 is rotatably installed in the middle of the rectangular groove, the threaded sleeve 5 is screwed on the outer wall of the screw rod 2, the front and rear ends of the threaded sleeve 5 are fixedly connected to the slider 8 by a support rod 6, a driving wheel 13 is installed at the input end of the screw rod 2, a mounting cavity is opened at the bottom of the left end of the base 1, a motor 14 is fixed in the mounting cavity, a driving wheel 15 is installed at the output end of the motor 14, the driving wheel 13 and the driving wheel 15 are connected by a transmission belt 16, and an I-shaped bracket 10 is installed between the top of the slider 8 and the bottom of the moving platform 3 by bolts;

[0022] The starting motor 14 drives the driving wheel 13 to rotate through the driving wheel 15 and the transmission belt 16, and the driving wheel 13 drives the screw rod 2 to rotate, so that the threaded sleeve 5 moves left and right. The threaded sleeve 5 drives the slider 8 to move through the support rod 6. At the same time, the slider 8 drives the T-shaped slider 9 and the moving platform 3 to move through the T-shaped connecting rod 11, which can compensate for the installation error between the screw rod 2 and the moving platform 3, and can compensate for the parallel error between the slide rail 7 and the screw rod 2, thereby ensuring the accuracy of the measurement data. The slider 8 is connected to the moving platform 3 through the I-shaped bracket 10 to increase the connection between the slider 8 and the moving platform 3. The connection strength is further ensured to further ensure the stability of the moving platform 3. The moving platform 3 is connected to the T-shaped slider 9 through the connecting plate 12. The T-shaped slider 9 moves in the T-shaped limit slide groove to support and limit the moving platform 3, thereby ensuring the stability of the moving platform 3 during movement and reducing the measurement error. The slider 8 drives the T-shaped slider 9 to move through the T-shaped connecting rod 11 and the connecting plate 12. The slider 8 is constrained to slide on the slide rail 7, which can offset the torque on the moving platform 3. The slider 8 can directly reduce or offset the swinging force of the screw, thereby ensuring the stability of the moving platform 3 and ensuring the measurement accuracy.

[0023] Example 2

[0024] like Figure 2 , Figure 4 and Figure 6As shown, convex slide grooves are provided at the front and rear ends of the top of the base 1, convex sliders 4 are fixedly installed at the front and rear ends of the bottom of the moving platform 3, and the convex sliders 4 are slidably installed in the convex slide grooves. A bottom frame 17 is installed at the bottom of the installation cavity by bolts, and a filter screen 18 is installed in the middle of the bottom frame 17. An air pump 19 is installed on the left side wall of the base 1, and two cover plates 21 are installed at the left end of the installation cavity by bolts. The input end of the air pump 19 is connected to the cover plate 21 through an air extraction pipe 20;

[0025] When the movable platform 3 moves, it drives the convex sliding block 4 to move in the convex sliding groove, further limiting and guiding the movable platform 3 to ensure the measurement accuracy, starting the vacuum pump 19 to extract air from the installation cavity through the vacuum pipe 20, allowing air to enter the installation cavity through the filter 18, and then be discharged, taking away the heat of the motor 14 when it is in use, avoiding the heat generated by the motor 14 from being transferred to the measuring platform, eliminating the factor that the heat affects the measurement accuracy, and filtering the air through the filter 18 to avoid the entry of impurities that affect the service life of the motor 14.

[0026] like Figures 1 to 6 As shown, a transmission mechanism for a three-dimensional coordinate measuring machine of the utility model is provided. When working, the motor 14 is started to drive the driving wheel 13 to rotate through the driving wheel 15 and the transmission belt 16, and the driving wheel 13 drives the screw rod 2 to rotate, so that the threaded sleeve 5 moves left and right, and the threaded sleeve 5 drives the slider 8 to move through the support rod 6, and the slider 8 drives the T-shaped slider 9 to move through the T-shaped connecting rod 11 and the connecting plate 12. The slider 8 is constrained to slide on the slide rail 7, which can offset the torque on the moving platform 3. The slider 8 is connected to the moving platform 3 through the I-shaped bracket 10 to increase the connection strength between the moving platform 3 and the moving platform 3. The vacuum pump 19 is started to extract air from the installation cavity through the vacuum pipe 20, so that air enters the installation cavity through the filter 18 and then is discharged to take away the heat of the motor 14 when it is used, so as to avoid the heat generated by the motor 14 from being transferred to the measuring platform. The T-shaped slider 9 moves in the T-shaped limit slide groove to support and limit the moving platform 3. When the moving platform 3 moves, it drives the convex slider 4 to move in the convex slide groove to further limit and guide the moving platform 3.

[0027] The electric motor 14 and the vacuum pump 19 of the transmission mechanism for a three-coordinate measuring machine of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A transmission mechanism for a three-dimensional coordinate measuring machine, characterized in that: The invention comprises a base (1) and a moving platform (3); the base (1) can be fixedly mounted on a main frame of a three-dimensional coordinate measuring machine; the moving platform (3) is slidably mounted on the top of the base (1) via a limiter assembly; a rectangular groove is provided in the middle of the base (1); a driving assembly is mounted in the middle of the rectangular groove of the base (1); auxiliary guide assemblies are mounted on the front and rear sides of the driving assembly; the output end of the driving assembly is connected to the auxiliary guide assembly, and the output end of the auxiliary guide assembly is connected to the limiter assembly of the moving platform (3); and a cooling assembly is mounted on the driving assembly.

2. A transmission mechanism for a three-dimensional coordinate measuring machine as claimed in claim 1, characterized in that: The limiting assembly comprises two T-shaped slide blocks (9) and two connecting plates (12); the front and rear ends of the rectangular groove are symmetrically provided with T-shaped limiting slide grooves; the side wall of the rectangular groove is provided with a pushing groove connected to the T-shaped limiting slide groove; the T-shaped slide block (9) is slidably installed in the T-shaped limiting slide groove; the lower part of the T-shaped slide block (9) is slidably installed in the pushing groove and is fixedly connected with the connecting plate (12); the front and rear ends of the lower part of the moving platform (3) are connected to the upper part of the connecting plate (12) by fixing bolts.

3. A transmission mechanism for a three-dimensional coordinate measuring machine as claimed in claim 2, characterized in that: The auxiliary guide assembly comprises two slide rails (7), two sliders (8) and two T-shaped connecting rods (11); the two slide rails (7) are symmetrically mounted on the front and rear sides of the rectangular groove; the sliders (8) are slidably mounted on the slide rails (7); the T-shaped connecting rod (11) is fixedly mounted on the ends of the two sliders (8) that are away from each other; and the other end of the T-shaped connecting rod (11) is connected to the lower part of the connecting plate (12) via a fixing bolt.

4. A transmission mechanism for a three-dimensional coordinate measuring machine as claimed in claim 3, characterized in that: The driving assembly comprises a screw rod (2), a threaded sleeve (5), two support rods (6), a driving wheel (13), a motor (14), a driving wheel (15) and a transmission belt (16); the screw rod (2) is rotatably mounted in the middle of a rectangular groove; the threaded sleeve (5) is screwed onto the outer wall of the screw rod (2); the front and rear ends of the threaded sleeve (5) are fixedly connected to a slider (8) via the support rod (6); the driving wheel (13) is mounted at the input end of the screw rod (2); a mounting cavity is provided at the bottom of the left end of the base (1); the motor (14) is fixed in the mounting cavity; the driving wheel (15) is mounted at the output end of the motor (14); and the driving wheel (13) and the driving wheel (15) are connected in transmission via a transmission belt (16).

5. The transmission mechanism for a three-dimensional coordinate measuring machine as claimed in claim 3, characterized in that: An I-shaped bracket (10) is installed between the top of the sliding block (8) and the bottom of the moving platform (3) via bolts.

6. The transmission mechanism for a three-dimensional coordinate measuring machine as claimed in claim 4, characterized in that: The cooling component comprises a bottom frame (17), a filter screen (18), an air pump (19), an air extraction pipe (20) and two cover plates (21); the bottom of the installation cavity is mounted with the bottom frame (17) by means of bolts; the middle of the bottom frame (17) is mounted with the filter screen (18); the air pump (19) is mounted on the left side wall of the base (1); the two cover plates (21) are mounted on the left end of the installation cavity by means of bolts; and the input end of the air pump (19) is connected to the cover plate (21) by means of the air extraction pipe (20).

7. The transmission mechanism for a three-dimensional coordinate measuring machine according to claim 1, characterized in that: The top front and rear ends of the base (1) are provided with convex sliding grooves, and the bottom front and rear ends of the moving platform (3) are fixedly installed with convex sliding blocks (4), which are slidably installed in the convex sliding grooves.

Images