Balance shaft plane measuring tool
By designing a balance shaft plane measurement fixture that includes positioning, measurement, cleaning, and rust prevention mechanisms, the problems of high cost and low efficiency in existing technologies have been solved, achieving low-cost and high-efficiency balance shaft measurement and ensuring measurement accuracy and equipment lifespan.
Patent Information
- Application Number
- CN202511348319.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-20
- Publication Date
- 2025-12-16
AI Technical Summary
Existing balance shaft measuring equipment is costly and inefficient, making it difficult to meet the precision requirements of modern manufacturing.
A balance shaft plane measuring fixture was designed, which includes a positioning mechanism and a measuring mechanism. The balance shaft is fixed and measured by a combination of clamping blocks, threaded columns and knobs. It is also equipped with a cleaning and rust prevention mechanism to ensure measurement accuracy and equipment life.
It achieves low-cost and high-efficiency balance shaft measurement, and ensures measurement accuracy and equipment lifespan through automatic lubrication and cleaning mechanisms.
Smart Images
Figure CN121140569A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the fields of machining and measurement technology, and in particular to a balance shaft plane measurement fixture. Background Technology
[0002] A balance shaft is a vibration damping device used in engines. It uses an eccentric counterweight that rotates in the opposite direction to counteract the vibrations caused by the piston's movement, thereby improving operational smoothness and driving comfort. In essence, a balance shaft is a metal shaft with an eccentric weight that rotates synchronously with the engine crankshaft but in the opposite direction. It counteracts the vibrations caused by the reciprocating motion of the piston by generating a reverse centrifugal force. As an important component in engines and industrial machinery, the machining accuracy of the balance shaft directly affects the operational smoothness and lifespan of the equipment.
[0003] With the increasing precision requirements of modern manufacturing, the measurement technology of balance shafts is receiving more and more attention. Currently, the industry generally uses specialized measuring equipment for the dimensional inspection of balance shafts, but these methods suffer from problems such as high cost and low efficiency.
[0004] Therefore, this application provides a balance shaft plane measuring fixture. Summary of the Invention
[0005] The purpose of this application is to solve at least one technical problem raised in the background art.
[0006] This application provides a balance shaft plane measuring fixture, including a base, a positioning mechanism, and a measuring mechanism; The positioning mechanism is used to fix the balance shaft body. The positioning mechanism includes two clamping blocks that are slidably disposed on the upper surface of the base. Each of the two clamping blocks has a clamping groove on its surface. The inner walls of the two clamping grooves respectively clamp and fix a positioning rod and an internal threaded sleeve. The inner wall of the internal threaded sleeve is threadedly connected to a threaded post. The ends of the threaded post and the positioning rod are fixed with a pin. Both ends of the balance shaft body are reserved with positioning grooves that are adapted to the pins. The other end of the threaded post is fixed with a knob cylinder that rotates and slides with the outer surface of the internal threaded sleeve. The measuring mechanism includes a slider that is slidably disposed on the front of the base, and two symmetrical mounting rods fixed on the upper surface of the slider. A dial indicator is rotatably disposed at the top of each of the two mounting rods via an adjusting bolt, and a probe is disposed at the measuring end of the dial indicator.
[0007] Preferably, the upper surface of the base is provided with a first T-shaped groove, and the bottom ends of the two clamping blocks are each fixed with a first limiting block that is slidably connected to the inner wall of the first T-shaped groove. The surface of the clamping block is provided with a square opening, and the inner bottom wall of the square opening is threaded with a first knob bolt that passes through the first limiting block. The bottom end of the first knob bolt is fixed with a first locking block that is slidably connected to the inner wall of the first T-shaped groove.
[0008] By adopting the above technical solution, and by setting the first knob bolt and the first locking block, the first locking block can be pressed against the inner wall of the first T-shaped slide by rotating the first knob bolt, thereby achieving effective braking of the clamping block.
[0009] Preferably, the upper surface of the clamping block has two symmetrical vertical threaded grooves that penetrate the clamping groove, and the inner walls of the two vertical threaded grooves are threaded with hexagon socket head cap bolts.
[0010] By adopting the above technical solution, the positioning rod and the internal threaded sleeve can be effectively locked and fixed by turning the internal hex bolt.
[0011] Preferably, the base has a second T-shaped groove on its front side, the slider has a second limiting block fixedly mounted on its back side that is slidably connected to the inner wall of the second T-shaped groove, the slider has two second knob bolts threaded through the second limiting block on its front side, and the ends of the second knob bolts have a second locking block fixedly mounted that is slidably connected to the inner wall of the second T-shaped groove.
[0012] By adopting the above technical solution, the second locking block can be pressed against the inner wall of the second T-shaped slide by turning the second knob bolt, thereby achieving effective braking and locking of the slider.
[0013] Preferably, the end of the positioning rod is fixed with a rubber sleeve that is adapted to the end of the balance shaft body, the end of the pin of the threaded column is fixed with an external threaded ring, the end of the threaded column is provided with an annular threaded groove that is threadedly connected to the external threaded ring, and the end of the threaded column is provided with a cleaning mechanism for cleaning the dust inside the positioning groove reserved at the other end of the balance shaft body.
[0014] By adopting the above technical solution, the ejector pin can be quickly replaced through the external threaded ring, and the cleaning mechanism facilitates the cleaning of the inner wall of the positioning groove at the end of the balance shaft.
[0015] Preferably, the cleaning mechanism includes a first channel and a second channel respectively opened inside the threaded column and the ejector pin, and the first channel and the second channel respectively penetrate the threaded column and the ejector pin. The outer surface of the end of the internal threaded sleeve is provided with a connecting ring rotatably arranged by a bearing. An annular telescopic airbag is fixed between the surface of the connecting ring and the inner wall of the knob cylinder. The inner wall of the annular telescopic airbag is provided with a plurality of first return springs arranged in a circumferential array.
[0016] By adopting the above technical solution, the first and second channels can be inflated by the compression of the annular telescopic airbag, so that the airflow can be discharged into the positioning groove through the end of the ejector pin, thereby achieving automatic cleaning of the positioning groove.
[0017] Preferably, the knob cylinder has a connecting cavity inside, the first channel extends into the connecting cavity, the end of the annular telescopic airbag is arranged in a circumferential array with several inflation tubes, one end of each inflation tube extends into the interior of the annular telescopic airbag, and the other end of each inflation tube extends into the connecting cavity. The other end of the annular telescopic airbag is provided with two symmetrical suction tubes that pass through the connecting ring. The end of each suction tube is provided with a filter cover, and the suction tube and the inflation tube are respectively provided with a suction one-way valve and an inflation one-way valve.
[0018] By adopting the above technical solution, when the annular telescopic airbag is compressed, the interior of the connecting cavity can be inflated through the inflation tube, and when the annular telescopic airbag is reset, automatic reset inflation can be achieved through the suction tube.
[0019] Preferably, the end of the clamping block is provided with a rust prevention mechanism. The rust prevention mechanism includes an arc-shaped cover fixed to the end of the clamping block and corresponding to the ejector pin, and a connecting box embedded in the surface of the arc-shaped cover. A piston plate is slidably provided on the inner wall of the connecting box, and a filling tube is provided on the upper surface of the connecting box. A sealing plug is provided at the top end of the filling tube, and lubricating oil is added to the inside of the connecting box through the filling tube.
[0020] By adopting the above technical solution, the lubricating oil in the connection box can be used to maintain and protect the ejector pin after use.
[0021] Preferably, a nozzle is fixedly provided on the lower surface of the end of the connecting box, and the nozzle is connected to the interior of the connecting box through a pipe.
[0022] By adopting the above technical solution, lubricating oil can be sprayed from the nozzle onto the surface of the ejector pin.
[0023] Preferably, the lower surface of the connecting box has a strip-shaped opening, and an L-shaped slide rod corresponding to the end of the ejector pin is slidably arranged on the inner wall of the strip-shaped opening. The end of the L-shaped slide rod is fixedly connected to the surface of the piston plate, and a second return spring is fixedly arranged on the surface of the L-shaped slide rod. The other end of the second return spring is fixedly connected to the inner wall of the strip-shaped opening.
[0024] By adopting the above technical solution, the L-shaped slide bar can be automatically squeezed by the movement of the ejector pin.
[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The balance shaft plane measuring fixture described in this application, by setting a positioning mechanism and a measuring mechanism, can firmly fix the balance shaft body when measuring the plane of the balance shaft. Then, the slider is moved so that the probe on the dial indicator reaches the designated detection position on the surface of the balance shaft body. The dial indicator is then zeroed. Finally, the slider is moved again to move the dial indicator and the probe, and the change in the dial indicator reading is observed. It is determined whether the change in the dial indicator reading is within the specified range, so that the balance shaft body can be quickly determined to be qualified. Thus, the fixture has the advantages of low manufacturing cost and high measurement efficiency.
[0026] 2. The balance shaft plane measuring fixture described in this application, by setting a cleaning mechanism, when fixing the balance shaft body, firstly, one end of the balance shaft body is fitted into the rubber sleeve on the positioning rod, and the corresponding clamping block of the positioning rod is fixed. Then, another clamping block is moved to a suitable position and fixed. Then, the knob is rotated to drive the threaded column to rotate. The rotation of the threaded column, under the action of the internal threaded sleeve, drives the threaded column and the ejector pin to move, so that the ejector pin gradually approaches the positioning groove at the end of the balance shaft body. During the movement of the threaded column, the annular telescopic airbag can be squeezed, so that the air in the annular telescopic airbag can enter the connecting cavity through the inflation tube, and then be discharged from the end of the ejector pin after passing through the first channel and the second channel. During the process of the airflow being discharged outward through the end of the ejector pin, the inner wall of the positioning groove at the end of the balance shaft can be blown, thereby realizing the automatic cleaning of dust particles on the inner wall of the positioning groove, ensuring the accuracy after the ejector pin is inserted into the positioning groove, and avoiding damage to the surface of the ejector pin.
[0027] 3. The balance shaft plane measuring fixture described in this application, by setting an anti-rust mechanism, after the balance shaft body is measured, the knob is rotated in the opposite direction to drive the ejector pin away from the balance shaft body. When the ejector pin enters the arc-shaped cover, the ejector pin continues to move. The end of the ejector pin can push the L-shaped slide rod, so that the L-shaped slide rod can drive the piston plate to move. The movement of the piston plate can squeeze the lubricating oil, so that the lubricating oil can enter the nozzle through the pipe and be sprayed onto the surface of the ejector pin through the nozzle, thereby realizing automatic lubrication and protection of the ejector pin surface and preventing the ejector pin from rusting after use. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a rear view structural diagram of Embodiment 1 of this application; Figure 3 This is a side view of the structure of Embodiment 1 of this application; Figure 4 This is a cross-sectional structural diagram of Embodiment 1 of this application; Figure 5 This application Figure 4Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the overall structure of Embodiment 2 of this application; Figure 7 This is a schematic diagram of the three-dimensional structure of a clamping block in Embodiment 2 of this application; Figure 8 This is a schematic cross-sectional view of the threaded post and knob cylinder in Embodiment 2 of this application; Figure 9 This application Figure 8 Enlarged structural diagram at point B; Figure 10 This application Figure 8 Enlarged structural diagram at point C; Figure 11 This application Figure 8 Enlarged structural diagram at point D.
[0029] Explanation of reference numerals in the attached figures: 100. Base; 200. Positioning mechanism; 201. Clamping block; 202. Positioning rod; 2021. Rubber sleeve; 203. Internal threaded sleeve; 204. Threaded post; 205. Ejector pin; 2051. External threaded ring; 206. Positioning groove; 207. Knob cylinder; 208. First T-shaped slide groove; 209. First limiting block; 2010. First knob bolt; 2011. First locking block; 2012. Socket headstock bolt; 300. Measuring mechanism; 301. Slider; 302. Mounting rod; 303. Dial indicator; 304. Probe; 305. Second T-slot; 306. Second limit block; 307. Second knob bolt; 308. Second locking block; 400. Balance shaft body; 500. Cleaning mechanism; 501. First channel; 502. Second channel; 503. Connecting ring; 504. Annular telescopic airbag; 505. First return spring; 506. Connecting cavity; 507. Inflation tube; 508. Suction tube; 600. Rust prevention mechanism; 601. Arc-shaped cover; 602. Connecting box; 603. Piston plate; 604. Filling pipe; 605. Lubricating oil; 606. Nozzle; 607. Strip opening; 608. L-shaped slide bar; 609. Second return spring. Detailed Implementation
[0030] The following combination Figures 1 to 11 This application will be described in further detail below.
[0031] Example 1 Please refer to Figures 1 to 5A balance shaft plane measuring fixture includes a base 100, a positioning mechanism 200, and a measuring mechanism 300. The positioning mechanism 200 is used to fix the balance shaft body 400. The positioning mechanism 200 includes two clamping blocks 201 slidably disposed on the upper surface of the base 100. Each clamping block 201 has a clamping groove on its surface. The inner walls of the two clamping grooves respectively clamp and fix a positioning rod 202 and an internally threaded sleeve 203. The inner wall of the internally threaded sleeve 203 is threadedly connected to a threaded post 204. The ends of the threaded post 204 and the positioning rod 202 are both fixed. The balance shaft body 400 has a pin 205 and positioning grooves 206 that are adapted to the pin 205 at both ends. The other end of the threaded column 204 is fixed with a knob cylinder 207 that rotates and slides with the outer surface of the internal threaded sleeve 203. The measuring mechanism 300 includes a slider 301 that is slidably disposed on the front of the base 100, and two symmetrical mounting rods 302 that are fixed on the upper surface of the slider 301. The top ends of the two mounting rods 302 are rotatably disposed with a dial indicator 303 through adjusting bolts. The measuring end of the dial indicator 303 is provided with a probe 304.
[0032] Please refer to Figure 3 , Figure 5 The upper surface of the base 100 is provided with a first T-shaped groove 208. The bottom ends of the two clamping blocks 201 are each fixed with a first limiting block 209 that is slidably connected to the inner wall of the first T-shaped groove 208. The surface of the clamping block 201 is provided with a square opening, and the inner bottom wall of the square opening is threaded with a first knob bolt 2010 that passes through the first limiting block 209. The bottom end of the first knob bolt 2010 is fixed with a first locking block 2011 that is slidably connected to the inner wall of the first T-shaped groove 208.
[0033] Furthermore, by setting the first knob bolt 2010 and the first locking block 2011, the first locking block 2011 can be driven to press against the inner wall of the first T-shaped slide groove 208 by rotating the first knob bolt 2010, thereby achieving effective braking of the clamping block 201.
[0034] Please refer to Figure 1 , Figure 2 The upper surface of the clamping block 201 has two symmetrical vertical threaded grooves that penetrate the clamping groove, and the inner walls of the two vertical threaded grooves are threaded with hexagon socket head cap bolts 2012.
[0035] Furthermore, the positioning rod 202 and the internal threaded sleeve 203 can be effectively locked and fixed by turning the internal hex bolt 2012.
[0036] Please refer to Figure 2 , Figure 3The base 100 has a second T-shaped groove 305 on its front side. The slider 301 has a second limiting block 306 fixed on its back side, which is slidably connected to the inner wall of the second T-shaped groove 305. The slider 301 has two second knob bolts 307 threaded through the second limiting block 306 on its front side. The ends of the second knob bolts 307 are fixed with second locking blocks 308 that are slidably connected to the inner wall of the second T-shaped groove 305.
[0037] Furthermore, by turning the second knob bolt 307, the second locking block 308 can be driven to press against the inner wall of the second T-shaped slide groove 305, thereby achieving effective braking and locking of the slider 301.
[0038] In this embodiment, by setting a positioning mechanism 200 and a measuring mechanism 300, when measuring the plane of the balance shaft, the two clamping blocks 201 can be moved first so that the positioning rod 202 and the pins 205 at the ends of the threaded column 204 can press against the positioning grooves 206 at both ends of the balance shaft body 400. After fixing the two clamping blocks 201 by rotating the two first knob bolts 2010 respectively, the knob cylinder 207 is rotated to drive the threaded column 204 to rotate, thereby driving the threaded column 204 to move on the inner wall of the internal threaded sleeve 203, so that the pins at the ends of the threaded column 204... The 205 tool can firmly fix the balance shaft body 400, then move the slider 301 so that the probe 304 on the dial indicator 303 reaches the designated detection position on the surface of the balance shaft body 400, zero the dial indicator 303, and finally move the slider 301 to move the dial indicator 303 and the probe 304, and observe the change in the reading of the dial indicator 303 to determine whether the change in the reading of the dial indicator 303 is within the specified range. This allows for a quick determination of whether the balance shaft body 400 is qualified, thus giving the tooling the advantages of low manufacturing cost and high measurement efficiency.
[0039] Example 2 Based on Example 1, referring to Figures 6 to 11 And unlike Example 1, the following is true: Please refer to Figure 6 , Figure 9 The end of the positioning rod 202 is fixed with a rubber sleeve 2021 that is adapted to the end of the balance shaft body 400. The end of the pin 205 at the end of the threaded column 204 is fixed with an external threaded ring 2051. The end of the threaded column 204 is provided with an annular threaded groove that is threadedly connected to the external threaded ring 2051. The end of the threaded column 204 is provided with a cleaning mechanism 500 for cleaning the dust inside the positioning groove 206 reserved at the other end of the balance shaft body 400.
[0040] Furthermore, the external threaded ring 2051 enables quick replacement of the ejector pin 205, while the cleaning mechanism 500 facilitates cleaning of the inner wall of the positioning groove 206 at the end of the balance shaft.
[0041] Please refer to Figure 8 , Figure 10 The cleaning mechanism 500 includes a first channel 501 and a second channel 502 respectively opened inside the threaded post 204 and the ejector pin 205, and the first channel 501 and the second channel 502 respectively pass through the threaded post 204 and the ejector pin 205. The outer surface of the end of the internal threaded sleeve 203 is rotatably provided with a connecting ring 503 through a bearing. An annular telescopic airbag 504 is fixed between the surface of the connecting ring 503 and the inner wall of the knob cylinder 207. The inner wall of the annular telescopic airbag 504 is provided with a plurality of first return springs 505 arranged in a circumferential array.
[0042] Furthermore, the compression of the annular telescopic airbag 504 can inflate the interior of the first channel 501 and the second channel 502, thereby allowing the airflow to be discharged through the end of the ejector pin 205 into the positioning groove 206, thus achieving automatic cleaning of the positioning groove 206.
[0043] Please refer to Figure 8 , Figure 10 The knob cylinder 207 has a connecting cavity 506 inside, and the first channel 501 extends into the connecting cavity 506. The end of the annular telescopic airbag 504 is arranged in a circumferential array with several inflation tubes 507, one end of each inflation tube 507 extends into the annular telescopic airbag 504, and the other end of each inflation tube 507 extends into the connecting cavity 506. The other end of the annular telescopic airbag 504 is provided with two symmetrical suction tubes 508 that pass through the connecting ring 503. The end of the suction tube 508 is provided with a filter cover, and the suction tube 508 and the inflation tube 507 are respectively provided with a suction one-way valve and an inflation one-way valve.
[0044] Furthermore, when the annular telescopic airbag 504 is compressed, the interior of the connecting cavity 506 can be inflated through the inflation tube 507, and when the annular telescopic airbag 504 is reset, automatic reset inflation can be achieved through the suction tube 508.
[0045] In this invention, by setting up a cleaning mechanism 500, when fixing the balance shaft body 400, one end of the balance shaft body 400 is first fitted into the rubber sleeve 2021 on the positioning rod 202, and the clamping block 201 corresponding to the positioning rod 202 is fixed. Then, another clamping block 201 is moved to a suitable position and fixed. Then, the knob cylinder 207 is rotated, which drives the threaded column 204 to rotate. The rotation of the threaded column 204, under the action of the internal threaded sleeve 203, drives the threaded column 204 and the ejector pin 205 to move, so that the ejector pin 205 gradually approaches the positioning groove 206 at the end of the balance shaft body 400. During the movement of 204, the annular telescopic airbag 504 can be compressed, allowing the air inside the annular telescopic airbag 504 to enter the connecting cavity 506 through the inflation tube 507, and then exit from the end of the ejector pin 205 after passing through the first channel 501 and the second channel 502. As the airflow exits outward through the end of the ejector pin 205, it blows air onto the inner wall of the positioning groove 206 at the end of the balance shaft, thereby automatically cleaning the dust particles on the inner wall of the positioning groove 206, ensuring the accuracy of the ejector pin 205 after it is inserted into the positioning groove 206, and avoiding damage to the surface of the ejector pin 205.
[0046] Please refer to Figure 8 , Figure 11 The end of the clamping block 201 is provided with a rust prevention mechanism 600. The rust prevention mechanism 600 includes an arc-shaped cover 601 fixed to the end of the clamping block 201 and corresponding to the ejector pin 205, and a connecting box 602 embedded in the surface of the arc-shaped cover 601. A piston plate 603 is slidably provided on the inner wall of the connecting box 602, and a filling tube 604 is provided on the upper surface of the connecting box 602. A sealing plug is provided at the top of the filling tube 604, and lubricating oil 605 is added to the inside of the connecting box 602 through the filling tube 604.
[0047] Furthermore, the lubricating oil 605 inside the connecting box 602 can be used to maintain and protect the ejector pin 205 after use.
[0048] Please refer to Figure 8 , Figure 11 A nozzle 606 is fixedly mounted on the lower end surface of the connecting box 602, and the nozzle 606 is connected to the interior of the connecting box 602 through a pipe.
[0049] Furthermore, lubricating oil 605 can be sprayed from the nozzle 606 onto the surface of the ejector pin 205.
[0050] Please refer to Figure 8 , Figure 11The lower surface of the connecting box 602 is provided with a strip-shaped opening 607. An L-shaped slide rod 608 corresponding to the end of the ejector pin 205 is slidably provided on the inner wall of the strip-shaped opening 607. The end of the L-shaped slide rod 608 is fixedly connected to the surface of the piston plate 603, and a second return spring 609 is fixedly provided on the surface of the L-shaped slide rod 608. The other end of the second return spring 609 is fixedly connected to the inner wall of the strip-shaped opening 607.
[0051] Furthermore, the L-shaped slide bar 608 can be automatically squeezed by moving the ejector pin 205.
[0052] In this invention, by setting up a rust-prevention mechanism 600, after measuring the balance shaft body 400, the knob cylinder 207 is rotated in the opposite direction to drive the ejector pin 205 away from the balance shaft body 400. When the ejector pin 205 enters the arc-shaped cover 601, the ejector pin 205 continues to move. The end of the ejector pin 205 can push the L-shaped slide rod 608, so that the L-shaped slide rod 608 can drive the piston plate 603 to move. The movement of the piston plate 603 can squeeze the lubricating oil 605, so that the lubricating oil 605 can enter the nozzle 60 through the pipe. The lubricant 605 is sprayed onto the surface of the ejector pin 205 through the nozzle 606, achieving automatic lubrication and protection of the ejector pin 205 surface and preventing rust after use. It should be noted that after the ejector pin 205 is lubricated and rust-proofed, the lubricating oil 605 in the connecting box 602 is squeezed out. When the ejector pin 205 is used again, the sealing plug is opened first, and the piston plate 603 is reset under the action of the second reset spring 609. During this process, the lubricating oil 605 is added through the filling tube 604.
[0053] Working principle: When measuring the plane of the balance shaft, first move the two clamping blocks 201 so that the positioning rod 202 and the pins 205 at the ends of the threaded column 204 can press against the positioning grooves 206 at both ends of the balance shaft body 400. After fixing the two clamping blocks 201 by rotating the two first knob bolts 2010 respectively, rotate the knob cylinder 207 to drive the threaded column 204 to rotate, thereby driving the threaded column 204 to move on the inner wall of the internal threaded sleeve 203, so that the pins 205 at the ends of the threaded column 204 can hold the balance shaft body 400 in place. After securing the balance shaft body 400 with a clamp, move the slider 301 so that the probe 304 on the dial indicator 303 reaches the designated detection position on the surface of the balance shaft body 400. Then, zero the dial indicator 303. Finally, move the slider 301 again to move the dial indicator 303 and the probe 304 and observe the change in the reading of the dial indicator 303. Determine whether the change in the reading of the dial indicator 303 is within the specified range. This allows for a quick determination of whether the balance shaft body 400 is qualified, thus giving the tooling the advantages of low manufacturing cost and high measurement efficiency. Meanwhile, another embodiment of this application is as follows: When fixing the balance shaft body 400, first, one end of the balance shaft body 400 is fitted into the rubber sleeve 2021 on the positioning rod 202, and the clamping block 201 corresponding to the positioning rod 202 is fixed. Then, another clamping block 201 is moved to a suitable position and fixed. Then, the knob cylinder 207 is rotated, which drives the threaded column 204 to rotate. The rotation of the threaded column 204, under the action of the internal threaded sleeve 203, drives the threaded column 204 and the ejector pin 205 to move, so that the ejector pin 205 gradually approaches the end of the balance shaft body 400. The positioning groove 206, during the movement of the threaded post 204, compresses the annular telescopic airbag 504, allowing air inside the annular telescopic airbag 504 to enter the connecting cavity 506 through the inflation tube 507, and then exit from the end of the ejector pin 205 after passing through the first channel 501 and the second channel 502. As the airflow exits from the end of the ejector pin 205, it blows air onto the inner wall of the positioning groove 206 at the end of the balance shaft, thereby automatically cleaning dust particles from the inner wall of the positioning groove 206 and ensuring the proper insertion of the ejector pin 205 into the positioning groove 206. To ensure accuracy within 6 seconds and avoid damage to the surface of the ejector pin 205, the balance shaft is then measured after positioning. After measuring the balance shaft body 400, the knob cylinder 207 is rotated in the reverse direction to move the ejector pin 205 away from the balance shaft body 400. When the ejector pin 205 enters the arc-shaped cover 601, it continues to move. The end of the ejector pin 205 can push the L-shaped slide bar 608, causing the L-shaped slide bar 608 to move the piston plate 603. The movement of the piston plate 603 can squeeze the lubricating oil 605, allowing the lubricating oil 605 to... The lubricant 605 enters the nozzle 606 through the pipe and is sprayed onto the surface of the ejector pin 205 through the nozzle 606, thereby achieving automatic lubrication and protection of the ejector pin 205 surface and preventing rust from occurring after the ejector pin 205 is used. It should be noted that after the ejector pin 205 is lubricated and rust-prevented once, the lubricating oil 605 in the connecting box 602 is squeezed out. When the ejector pin 205 is used again, the sealing plug is opened first, and during the process of the piston plate 603 being reset under the action of the second reset spring 609, the lubricating oil 605 is added through the filling pipe 604.
Claims
1. A balance shaft plane measuring tool characterized by, It comprises a base (100), a positioning mechanism (200) and a measuring mechanism (300); The positioning mechanism (200) is used for fixing the balance shaft body (400), and comprises two clamping blocks (201) slidingly arranged on the upper surface of the base (100), the surfaces of the two clamping blocks (201) are provided with clamping grooves, the inner walls of the two clamping grooves are respectively clamped and fixed with a positioning rod (202) and an internally threaded sleeve (203), the inner wall of the internally threaded sleeve (203) is threadedly connected with a threaded column (204), the end portions of the threaded column (204) and the positioning rod (202) are fixedly provided with thimbles (205), the two ends of the balance shaft body (400) are provided with positioning grooves (206) matched with the thimbles (205), and the other end of the threaded column (204) is fixedly provided with a knob cylinder (207) rotatingly and slidingly connected with the outer surface of the internally threaded sleeve (203). The measuring mechanism (300) comprises a sliding block (301) slidingly arranged on the front surface of the base (100), and two symmetrical mounting rods (302) fixedly arranged on the upper surface of the sliding block (301), and the top ends of the two mounting rods (302) are rotatably provided with a dial gauge (303) through adjusting bolts, and the measuring end of the dial gauge (303) is provided with a probe (304).
2. The balanced shaft flatness measuring tool of claim 1, wherein, The upper surface of the base (100) is provided with a first T-shaped sliding groove (208), the bottom ends of the two clamping blocks (201) are fixedly provided with first limiting blocks (209) slidingly connected with the inner wall of the first T-shaped sliding groove (208), the surface of the clamping block (201) is provided with a square opening, and the inner bottom wall of the square opening is threadedly connected with a first knob bolt (2010) penetrating through the first limiting block (209), and the bottom end of the first knob bolt (2010) is fixedly provided with a first locking block (2011) slidingly connected with the inner wall of the first T-shaped sliding groove (208).
3. The balanced shaft flatness measuring tool of claim 1, wherein, The upper surface of the clamping block (201) is provided with two symmetrical vertical threaded grooves penetrating through the clamping groove, and the inner walls of the two vertical threaded grooves are threadedly connected with hexagon bolts (2012).
4. The balanced-axle flatness measuring fixture of claim 1, wherein, The front surface of the base (100) is provided with a second T-shaped sliding groove (305), the back surface of the sliding block (301) is fixedly provided with a second limiting block (306) slidingly connected with the inner wall of the second T-shaped sliding groove (305), the front surface of the sliding block (301) is threadedly connected with two second knob bolts (307) penetrating through the second limiting block (306), and the end portions of the second knob bolts (307) are fixedly provided with second locking blocks (308) slidingly connected with the inner wall of the second T-shaped sliding groove (305).
5. The balanced-axle planar measuring fixture of claim 1, wherein, The end of the positioning rod (202) is fixedly provided with a rubber sleeve (2021) matched with the end of the balance shaft body (400), the end of the threaded column (204) is fixedly provided with an outer threaded ring (2051), the end of the threaded column (204) is provided with an annular threaded groove in threaded connection with the outer threaded ring (2051), and the end of the threaded column (204) is provided with a positioning groove (206) reserved for the other end of the balance shaft body (400) to clean dust inside the positioning groove (206).
6. The balanced-axle flatness measuring fixture of claim 5, wherein, The cleaning mechanism (500) comprises a first channel (501) and a second channel (502) respectively formed in the threaded column (204) and the thimble (205), and the first channel (501) and the second channel (502) respectively penetrate the threaded column (204) and the thimble (205), the outer surface of the end of the inner threaded sleeve (203) is rotatably provided with a connecting ring (503) through a bearing, the surface of the connecting ring (503) and the inner wall of the knob cylinder (207) are fixedly provided with an annular telescopic air bag (504), and the inner wall of the annular telescopic air bag (504) is circumferentially arranged with a plurality of first return springs (505).
7. The balanced-axle planar measuring fixture of claim 6, wherein, The inner part of the knob cylinder (207) is provided with a connecting cavity (506), the first channel (501) extends to the inside of the connecting cavity (506), the end of the annular telescopic air bag (504) is circumferentially arranged with a plurality of inflation tubes (507), one end of the plurality of inflation tubes (507) extends to the inside of the annular telescopic air bag (504), the other end of the plurality of inflation tubes (507) extends to the inside of the connecting cavity (506), the other end of the annular telescopic air bag (504) is provided with two symmetrical air suction tubes (508) penetrating the connecting ring (503), the end of the air suction tube (508) is provided with a filter cover, and the inside of the air suction tube (508) and the inflation tube (507) is respectively provided with an air suction one-way valve and an inflation one-way valve.
8. The balanced-axle flatness measuring fixture of claim 7, wherein, The end of the clamping block (201) is provided with a rust prevention mechanism (600), the rust prevention mechanism (600) comprises an arc-shaped cover (601) fixedly provided at the end of the clamping block (201) and corresponding to the thimble (205), and a connecting box (602) embedded on the surface of the arc-shaped cover (601), the inner wall of the connecting box (602) is slidably provided with a piston plate (603), the upper surface of the connecting box (602) is provided with a filling pipe (604), the top end of the filling pipe (604) is provided with a sealing plug, and the inside of the connecting box (602) is filled with lubricating oil (605) through the filling pipe (604).
9. The balanced-axle planar measuring fixture of claim 8, wherein, The end of the connecting box (602) is fixedly provided with a nozzle (606), and the nozzle (606) is in communication with the inside of the connecting box (602) through a pipeline.
10. The balanced-axle planar measuring fixture of claim 9, wherein, The lower surface of the connecting box (602) is provided with a strip-shaped opening (607), the inner wall of the strip-shaped opening (607) is slidably provided with an L-shaped slide rod (608) corresponding to the end of the ejector pin (205), the end of the L-shaped slide rod (608) is fixedly connected with the surface of the piston plate (603), and the surface of the L-shaped slide rod (608) is fixedly provided with a second reset spring (609), and the other end of the second reset spring (609) is fixedly connected with the inner wall of the strip-shaped opening (607).