Positioning device for automobile balance shaft machining

Abstract

The invention relates to the technical field of automobile part machining, in particular to an automobile balance shaft machining positioning device which comprises a mounting frame, an auxiliary control mechanism and a rotary driving mechanism. The number of the mounting frames is two, two annular frames are rotationally arranged on each mounting frame, and two clamping strips are movably arranged on each annular frame; the auxiliary control mechanism is arranged on the annular frame and used for controlling the clamping strips to move horizontally on the annular frame. The rotation driving mechanism is used for driving the annular frame to rotate. The function of rapidly clamping the automobile balance shaft is achieved, the clamping strips are controlled to stretch out and draw back through the auxiliary control mechanism to adapt to the automobile balance shafts of different sizes, two sets of clamping strips are arranged at each end, and through cooperation of the two sets of clamping strips, the coaxiality of the automobile balance shaft is stabilized when the annular frame is driven to rotate through the rotary driving mechanism. And therefore, the machining precision of the balance shaft is guaranteed, and the problem that a traditional positioning device cannot control the workpiece to rotate stably while clamping the workpiece is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive part processing, and specifically relates to a positioning device for processing automotive balance shafts. Background Art

[0002] An automotive balance shaft is a device used to counteract engine vibrations. Its core function is to reduce the impact of inertial forces generated during engine operation on the vehicle through the action of reverse vibration forces, thereby improving driving smoothness and comfort. When processing the balance shaft, it is necessary to clamp both ends of the workpiece respectively to ensure the coaxiality and dimensional tolerance of the middle shaft section. Positioning errors can lead to problems such as shaft diameter runout and poor gear meshing.

[0003] For this reason, a positioning device for an automotive balance shaft comprehensive inspection tool disclosed in Chinese Patent with the authorization announcement number CN218837463U adjusts the height of the positioning block through a design with adjustable height. Thus, when using the device, the height of the positioning block can be adjusted to a suitable position according to the diameter of the eccentric weight block on the outer side of the shaft body and other components. And due to the design of the rubber material of the clamping block, it can ensure the stability of the clamping block when clamping and positioning both ends of the shaft body, and will not cause damage to both ends of the shaft body. Therefore, it can effectively protect the shaft body, effectively improving the practicability and applicability of the device.

[0004] However, the clamping stability of the existing positioning device for the balance shaft is limited. Especially when turning and grinding the balance shaft, it is necessary to ensure the clamping stability of the balance shaft to prevent the workpiece from rotating and shifting. After fixing the balance shaft, it is also necessary to control the rotation of the balance shaft to ensure the roundness and straightness of the ground surface of the shaft diameter. For balance shafts of different sizes, when operators fix the balance shaft, they need to adjust the clamping size, which takes a long time, and the error of manual adjustment is limited by the experience of the operators, resulting in uncontrollable accuracy. Summary of the Invention

[0005] Aiming at the above problems, a positioning device for processing automotive balance shafts is provided, which solves the problem of how to quickly and stably clamp balance shafts of different sizes through a mounting frame, an auxiliary control mechanism, and a rotary drive mechanism.

[0006] To solve the problems of the existing technology, the present invention provides a positioning device for processing automotive balance shafts, including a mounting frame, an auxiliary control mechanism, and a rotary drive mechanism; there are two mounting frames, and two annular frames are rotatably arranged on each mounting frame, and two clamping bars are movably arranged on each annular frame; the auxiliary control mechanism is arranged on the annular frame, and the auxiliary control mechanism is used to control the translation of the clamping bar on the annular frame; the rotary drive mechanism is used to drive the annular frame to rotate.

[0007] Preferably, the auxiliary control mechanism includes a gas spring and a limiting component; the gas spring is arranged on the annular frame, and the piston rod of the gas spring is connected to the clamping strip; the limiting component is arranged on the annular frame, and the limiting component is used to limit the movement of the clamping strip.

[0008] Preferably, the positioning device includes an adjusting mechanism, and the adjusting mechanism includes a guide rail, a linear driving component and a lifting component; both mounting frames are slidably mounted on the guide rail; the linear driving component is arranged on the guide rail, and the linear driving component is used to drive the mounting frame to slide along the guide rail; a first support is arranged on the mounting frame, and the annular frame is rotatably connected to the first support; the lifting component is arranged on the mounting frame, and the lifting component is used to control the lifting of the first support.

[0009] Preferably, the rotary driving mechanism includes a main rod, a toothed ring and a rotary driving component; a rotary gear is sleeved on the main rod; the toothed ring is sleeved on the annular frame, and the rotary gear is meshed and connected with the toothed ring; the rotary driving component is used to drive the main rod to rotate.

[0010] Preferably, the rotary driving component includes a connecting seat, a gantry and a first rotary driver; the connecting seat is arranged on the mounting frame, and the rotary gear is rotatably arranged on the connecting seat; a second support is arranged on the gantry, the second support is arranged on the gantry in a liftable manner, and the second support is rotatably connected to the main rod; two bevel gears meshed with each other are arranged on the second support, one of the bevel gears is sleeved on the main rod, and the other bevel gear is in transmission connection with the first rotary driver.

[0011] Preferably, the limiting component includes a mounting seat, a limiting block, a control block and a first elastic member; the mounting seat is arranged on the annular frame; the limiting block is slidably mounted on the mounting seat, and a slot matched with the limiting block is formed on the clamping strip; the control block is movably arranged on the mounting seat; two ends of the first elastic member are respectively connected with the limiting block and the control block; a connecting rod connected with the control block is arranged on the annular frame, a second elastic member is arranged on the connecting rod, and two ends of the second elastic member are respectively connected with the connecting rod and the annular frame.

[0012] Preferably, a linear motor for pushing the connecting rod to move is arranged inside the annular frame.

[0013] Preferably, the linear driving component includes a second rotary driver and a first screw rod; the second rotary driver is arranged on the guide rail; the first screw rod is rotatably arranged on the guide rail, two thread segments with opposite spiral directions are arranged on the first screw rod, and the two thread segments are respectively in threaded connection with the two mounting frames.

[0014] Preferably, the lifting component includes a second screw rod and a guide bar; the second screw rod is rotatably arranged on the mounting frame, and the second screw rod is in threaded connection with the first support; a guide bar is arranged on the mounting frame, and the first support is in sliding fit with the guide bar; a motor for driving the second screw rod to rotate is arranged inside the mounting frame.

[0015] Preferably, a rubber pad is arranged on the clamping strip.

[0016] The beneficial effects of the present invention compared with the prior art are as follows:

[0017] 1. The present invention realizes the function of quickly clamping the automotive balance shaft through the mounting frame, the auxiliary control mechanism and the rotary drive mechanism. And the telescopic movement of the clamping strips is controlled by the auxiliary control mechanism to adapt to automotive balance shafts of different sizes. Two groups of clamping strips are arranged at each end. Through the cooperation of the two groups of clamping strips, when the rotary drive mechanism drives the annular frame to rotate, the coaxiality of the automotive balance shaft is stabilized. Furthermore, the machining accuracy of the balance shaft is guaranteed, and the problem that the traditional positioning device cannot control the stable rotation of the workpiece while clamping the workpiece is solved.

[0018] 2. The present invention realizes the function of controlling the movement of the clamping strips through the gas spring and the limiting component. Through the setting of the limiting component, the effect of automatic clamping can be achieved. After the two ends of the balance shaft are respectively inserted into the annular frames on both sides of the mounting frame, the movement restriction of the clamping strips by the limiting component is released, and the clamping strips automatically move towards the direction close to the axis of the annular frame under the elastic force of the gas spring, thereby clamping the balance shaft. The operator first moves the balance shaft to the designated position, and then releases the movement restriction of the clamping strips by the limiting component. The clamping strips move towards the direction close to the axis of the annular frame under the elastic force of the gas spring. As the two clamping strips on the same annular frame approach, the balance shaft is clamped through the cooperation of the two clamping strips. And two annular frames are provided on each mounting frame, and the balance shaft is clamped through the cooperation of the four clamping strips on each mounting frame.

[0019] 3. The present invention realizes the function of adjusting the position of the annular frame through the first bracket, the guide rail, the linear drive component and the lifting component. Before fixing the balance shaft, the two ends of the balance shaft need to pass through the annular frames on the two mounting frames respectively. Since parts such as eccentric blocks and gears are usually provided on the balance shaft, it is very difficult to insert the two ends of the balance shaft into the annular frames on both sides when the balance shaft is relatively long. Therefore, an adjustment mechanism is provided to adjust the position of the annular frame, so as to quickly match the balance shaft with the annular frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of the first angle of a positioning device for machining an automotive balance shaft according to the present invention.

[0021] Figure 2 is a perspective view of the cooperation of the mounting frame, the auxiliary control mechanism, the adjustment mechanism and the balance shaft in a positioning device for machining an automotive balance shaft according to the present invention.

[0022] Figure 3 is a perspective view of a single-group annular frame in a positioning device for machining an automotive balance shaft according to the present invention.

[0023] Figure 4It is a three-dimensional exploded view of a single-group annular frame in a positioning device for machining an automotive balance shaft according to the present invention.

[0024] Figure 5 is of the present invention Figure 4 Partial enlarged view of part A in

[0025] Figure 6 It is a three-dimensional exploded view of a limit component and a connecting rod in a positioning device for machining an automotive balance shaft according to the present invention.

[0026] Figure 7 It is a three-dimensional view of a second perspective of a positioning device for machining an automotive balance shaft according to the present invention.

[0027] Figure 8 It is a three-dimensional view of a rotation driving component in a positioning device for machining an automotive balance shaft according to the present invention.

[0028] Figure 9 It is a three-dimensional view of the cooperation of an annular frame, a main rod and a balance shaft in a positioning device for machining an automotive balance shaft according to the present invention.

[0029] Figure 10 It is a three-dimensional view of an adjusting mechanism in a positioning device for machining an automotive balance shaft according to the present invention.

[0030] The reference numerals in the figure are: 1, mounting frame; 11, annular frame; 111, clamping strip; 1111, rubber pad; 1112, slot; 12, first bracket; 13, threaded sleeve; 2, auxiliary control mechanism; 21, gas spring; 211, piston rod; 22, limit component; 221, mounting seat; 222, limit block; 223, control block; 224, first elastic member; 23, connecting rod; 231, second elastic member; 3, rotation driving mechanism; 31, main rod; 311, rotation gear; 32, toothed ring; 33, rotation driving component; 331, connecting seat; 332, gantry; 3321, second bracket; 33211, bevel gear; 3322, transmission shaft; 333, first rotation driver; 4, adjusting mechanism; 41, guide rail; 42, linear driving component; 421, second rotation driver; 422, first screw rod; 43, lifting component; 431, second screw rod; 432, guide strip; 5, balance shaft; 51, counterweight. Detailed implementation manners

[0031] To further understand the features, technical means, and specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0032] Refer to Figures 1 - 3: A positioning device for machining an automobile balance shaft 5, comprising a mounting frame 1, an auxiliary control mechanism 2 and a rotary drive mechanism 3; there are two mounting frames 1, and two annular frames 11 are rotatably arranged on each mounting frame 1, and two clamping strips 111 are movably arranged on each annular frame 11; the auxiliary control mechanism 2 is arranged on the annular frame 11, and the auxiliary control mechanism 2 is used to control the translation of the clamping strip 111 on the annular frame 11; the rotary drive mechanism 3 is used to drive the annular frame 11 to rotate.

[0033] The present invention realizes the function of quickly clamping the automobile balance shaft 5 through the mounting frame 1, the auxiliary control mechanism 2 and the rotary drive mechanism 3, and controls the telescopic movement of the clamping strip 111 through the auxiliary control mechanism 2 to adapt to automobile balance shafts 5 of different sizes. Two groups of clamping strips 111 are arranged at each end, and through the cooperation of the two groups of clamping strips 111, when the rotary drive mechanism 3 drives the annular frame 11 to rotate, the coaxiality of the automobile balance shaft 5 is stabilized. Furthermore, the machining accuracy of the balance shaft 5 is guaranteed, and the problem that the traditional positioning device cannot control the stable rotation of the workpiece while clamping the workpiece is solved. The clamping strip 111 is strip-shaped. The axes of the annular frames 11 on the two mounting frames 1 are arranged collinearly, and the clamping strips 111 of the two annular frames 11 on each mounting frame 1 are perpendicular to each other. In the working state, the operator inserts the two ends of the balance shaft 5 into the annular frames 11 of the two mounting frames 1 respectively. Then, the auxiliary control mechanism 2 is used to control the two clamping strips 111 on the annular frame 11 to move towards the direction close to the axis of the annular frame 11, and then the balance shaft 5 is clamped by the two clamping strips 111 on each annular frame 1. And there are two annular frames 11 on each mounting frame 1, and the balance shaft 5 is clamped and fixed by the clamping strips 111 on the two annular frames 11. After the fixation of the balance shaft 5 is completed, the rotary drive mechanism 3 is used to drive the plurality of annular frames 11 to rotate, the annular frame 11 drives the clamping strip 111 to rotate, and then the balance shaft 5 is driven to rotate by the clamping strip 111, so as to facilitate the turning machining of the balance shaft 5.

[0034] Refer to Figure 1 、 Figures 3 - 5 : The auxiliary control mechanism 2 includes a gas spring 21 and a limiting component 22; the gas spring 21 is arranged on the annular frame 11, and the piston rod 211 of the gas spring 21 is connected to the clamping strip 111; the limiting component 22 is arranged on the annular frame 11, and the limiting component 22 is used to limit the movement of the clamping strip 111.

[0035] The present invention realizes the function of controlling the movement of the clamping strip 111 through the gas spring 21 and the limiting component 22. Through the setting of the limiting component 22, the effect of automatic clamping can be achieved. After the two ends of the balance shaft 5 are respectively inserted into the annular frames 11 on both sides of the mounting frame 1, the movement restriction of the clamping strip 111 by the limiting component 22 is released. The clamping strip 111 automatically moves towards the axis direction of the annular frame 11 under the elastic force of the gas spring 21, thereby clamping the balance shaft 5. When the clamping strip 111 is in the reset state, the two clamping strips 111 are in the direction away from the axis of the annular frame 11. At this time, the gas spring 21 is in the contracted state, and the piston rod 211 has a pre-tightening force on the clamping strip 111, while the limiting component 22 restricts the movement of the clamping strip 111, and the clamping strip 111 has a tendency to move towards the axis direction of the annular frame 11. In the working state, the operator first moves the balance shaft 5 to the designated position, and then releases the movement restriction of the clamping strip 111 by the limiting component 22. The clamping strip 111 moves towards the axis direction of the annular frame 11 under the elastic force of the gas spring 21. As the two clamping strips 111 on the same annular frame 11 approach, the balance shaft 5 is clamped through the cooperation of the two clamping strips 111. And two annular frames 11 are provided on each mounting frame 1, and the balance shaft 5 is clamped through the cooperation of the four clamping strips 111 on each mounting frame 1.

[0036] Referring to Figure 1 and Figure 7 : The positioning device includes an adjusting mechanism 4. The adjusting mechanism 4 includes a guide rail 41, a linear drive assembly 42, and a lifting assembly 43; both mounting frames 1 are slidably mounted on the guide rail 41; the linear drive assembly 42 is arranged on the guide rail 41, and the linear drive assembly 42 is used to drive the mounting frame 1 to slide along the guide rail 41; a first bracket 12 is provided on the mounting frame 1, and the annular frame 11 is rotatably connected to the first bracket 12; the lifting assembly 43 is arranged on the mounting frame 1, and the lifting assembly 43 is used to control the lifting of the first bracket 12.

[0037] The present invention realizes the function of adjusting the position of the annular frame 11 through the first support 12, the guide rail 41, the linear drive assembly 42 and the lifting assembly 43. Before fixing the balance shaft 5, the two ends of the balance shaft 5 need to pass through the annular frames 11 on the two mounting brackets 1 respectively. Since parts such as eccentric blocks and gears are usually arranged on the balance shaft 5, it is very difficult to insert the two ends of the balance shaft 5 into the annular frames 11 on both sides when the balance shaft 5 is relatively long. Therefore, an adjusting mechanism 4 is provided to adjust the position of the annular frame 11, so as to quickly cooperate the balance shaft 5 with the annular frame 11. In the working state, the operator first controls the movement of the mounting bracket 1 through the linear drive assembly 42, so that the two mounting brackets 1 move away from each other until the two mounting brackets 1 respectively move to both ends of the guide rail 41. At this time, the distance between the two mounting brackets 1 is relatively large, and the operator can easily place the balance shaft 5 between the two mounting brackets 1. Then, the linear drive assembly 42 is used to drive the two mounting brackets 1 to approach each other until the annular frames 11 on the two mounting brackets 1 respectively move to both ends of the balance shaft 5. Then, the movement restriction of the clamping strip 111 by the limit assembly 22 is released, and the balance shaft 5 is clamped and fixed.

[0038] Refer to Figure 3 and Figure 7 : The rotary drive mechanism 3 includes a main rod 31, a toothed ring 32 and a rotary drive assembly 33; a rotary gear 311 is sleeved on the main rod 31; the toothed ring 32 is sleeved on the annular frame 11, and the rotary gear 311 is meshed and connected with the toothed ring 32; the rotary drive assembly 33 is used to drive the main rod 31 to rotate.

[0039] The present invention realizes the function of driving the annular frame 11 to rotate through the main rod 31, the toothed ring 32 and the rotary drive assembly 33. Four rotary gears 311 are sleeved on the main rod 31, and one toothed ring 32 is sleeved on each annular frame 11. The four rotary gears 311 are respectively meshed and connected with the toothed rings 32 on the four annular frames 11. And the rotary gear 311 is slidably sleeved on the main rod 31. When the mounting bracket 1 is controlled to slide along the guide rail 41 through the linear drive assembly 42, the position of the rotary gear 311 can be adjusted synchronously, so that the rotary gear 311 remains meshed with the toothed ring 32. After the balance shaft 5 is clamped and fixed, the operator drives the main rod 31 to rotate through the rotary drive assembly 33. The main rod 31 drives the rotary gear 311 to rotate. The rotary gear 311 drives the toothed ring 32 meshed with it to rotate. The toothed ring 32 drives the annular frame 11 to rotate. Then, the balance shaft 5 is driven to rotate through the clamping strip 111 on the annular frame 11, which is convenient for the operator to perform subsequent processing operations on the balance shaft 5.

[0040] Refer to Figures 7 - 9: The rotation drive assembly 33 includes a connecting seat 331, a gantry 332, and a first rotation driver 333; the connecting seat 331 is arranged on the mounting frame 1, and the rotation gear 311 is rotatably arranged on the connecting seat 331; a second bracket 3321 is provided on the gantry 332, the second bracket 3321 is arranged on the gantry 332 in a liftable manner, and the second bracket 3321 is rotatably connected to the main rod 31; two meshing bevel gears 33211 are provided on the second bracket 3321, one of the bevel gears 33211 is sleeved on the main rod 31, and the other bevel gear 33211 is in transmission connection with the first rotation driver 333.

[0041] The present invention realizes the function of driving the main rod 31 to rotate through the connecting seat 331, the gantry 332, and the first rotation driver 333. Through the movable setting of the second bracket 3321, the first rotation driver 333 does not affect the movement of the main annular frame 11 while driving the main rod 31 to rotate. The first rotation driver 333 is preferably a servo motor, and the servo motor is electrically connected to the controller. The gantry 332 is connected to the guide rail 41, and the connecting seat 331 is connected to the first bracket 12. A transmission shaft 3322 is rotatably arranged on the gantry 332, and the two bevel gears 33211 on the second bracket 3321 are respectively sleeved on the main rod 31 and the transmission shaft 3322, and the driving end of the first rotation driver 333 is in transmission connection with the transmission shaft 3322.

[0042] In the working state, through the cooperation of the auxiliary control mechanism 2 and the adjustment mechanism 4, the balance shaft 5 is fixed to the annular frame 11. Then, the controller sends a signal to the first rotation driver 333. After receiving the signal, the first rotation driver 333 drives the transmission shaft 3322 to rotate. The transmission shaft 3322 drives the main rod 31 to rotate through the bevel gear 33211. The main rod 31 drives a plurality of rotation gears 311 to rotate, and then drives the toothed ring 32 meshingly connected thereto through the rotation gears 311 to complete the rotation drive of the plurality of annular frames 11. When the lifting assembly 43 controls the lifting of the first bracket 12, the first bracket 12 drives the annular frame 11 and the connecting seat 331 to lift, and the connecting seat 331 drives the main rod 31 and the rotation gears 311 to lift. The main rod 31 drives the second bracket 3321 to move during the lifting process, and the second bracket 3321 drives the bevel gear 33211 to move. Furthermore, the meshing connection between the rotation gear 311 and the toothed ring 32 is maintained during the movement of the annular frame 11.

[0043] Refer to Figures 3 - 6: The limit component 22 includes a mounting base 221, a limit block 222, a control block 223, and a first elastic member 224; the mounting base 221 is provided on the annular frame 11; the limit block 222 is slidably mounted on the mounting base 221, and a slot 1112 cooperating with the limit block 222 is formed on the clamping strip 111; the control block 223 is movably arranged on the mounting base 221; both ends of the first elastic member 224 are respectively connected to the limit block 222 and the control block 223; a connecting rod 23 connected to the control block 223 is provided on the annular frame 11, and a second elastic member 231 is provided on the connecting rod 23, and both ends of the second elastic member 231 are respectively connected to the connecting rod 23 and the annular frame 11.

[0044] The present invention realizes the function of restricting the movement of the clamping strip 111 through the mounting base 221, the limit block 222, the control block 223, and the first elastic member 224. An arc surface is formed on the limit block 222. When the clamping strip 111 is in the reset state, the limit block 222 is aligned with the slot 1112 on the clamping strip 111, and the limit block 222 is inserted and matched with the slot 1112 under the elastic force of the first elastic member 224. After the balance shaft 5 and the annular frame 11 are matched, the operator manually pulls the connecting rod 23 to control the connecting rod 23 to move away from the annular frame 11. The second elastic member 231 elongates under the pulling force, and the control block 223 drives the limit block 222 to move through the first elastic member 224 until the limit block 222 is separated from the slot 1112, releasing the movement restriction of the limit component 22 on the clamping strip 111. The clamping strip 111 moves under the elastic force of the gas spring 21 to perform the clamping action. After the clamping strip 111 extends, the connecting rod 23 resets under the elastic force of the second elastic member 231. The connecting rod 23 drives the control block 223 to move, and the control block 223 pushes the limit block 222 to move through the first elastic member 224, so that the control block 223 and the limit block 222 complete the reset action.

[0045] Refer to Figures 3 - 6 : A linear motor for pushing the connecting rod 23 to move is built in the annular frame 11.

[0046] The present invention realizes the function of automatically controlling the movement of the connecting rod 23 through the linear motor, and further achieves the function of releasing the movement restriction of the limit component 22 on the clamping strip 111. The linear motor is electrically connected to the controller. In the working state, the controller sends a signal to the linear motor, and the linear motor pushes the connecting rod 23 to move. The second elastic member 231 elongates under the pushing force. Thus, it replaces manual operation and automatically releases the movement restriction of the limit component 22 on the clamping strip 111.

[0047] Refer to Figure 1 、 Figure 7 and Figure 10: The linear drive assembly 42 includes a second rotary drive 421 and a first screw 422; the second rotary drive 421 is arranged on the guide rail 41; the first screw 422 is rotatably arranged on the guide rail 41, and two thread segments with opposite helix directions are provided on the first screw 422, and the two thread segments are respectively threadedly connected to the two mounting brackets 1.

[0048] The present invention realizes the function of driving the movement of the mounting bracket 1 through the second rotary drive 421 and the first screw 422. A threaded sleeve 13 is provided on the mounting bracket 1, and the threaded sleeves 13 of the two mounting brackets 1 are respectively threadedly connected to the two thread segments of the first screw 422. The second rotary drive 421 is preferably a servo motor, and the servo motor is electrically connected to the controller. In the working state, the controller sends a signal to the second rotary drive 421, and after receiving the signal, the second rotary drive 421 drives the first screw 422 to rotate, and the first screw 422 drives the two mounting brackets 1 to move in the opposite direction at the same speed, thereby adjusting the distance between the two mounting brackets 1.

[0049] Refer to Figure 7 and Figure 10 : The lifting assembly 43 includes a second screw 431 and a guide bar 432; the second screw 431 is rotatably arranged on the mounting bracket 1, and the second screw 431 is threadedly connected to the first bracket 12; a guide bar 432 is provided on the mounting bracket 1, and the first bracket 12 is slidably matched with the guide bar 432; a motor for driving the second screw 431 to rotate is built in the mounting bracket 1.

[0050] The present invention realizes the function of controlling the lifting of the first bracket 12 through the second screw 431 and the guide bar 432. When adjusting the height of the balance shaft 5, the operator sends a signal to the motor built in the mounting bracket 1 through the controller, and after receiving the signal, the motor drives the second screw 431 to rotate, and the second screw 431 drives the first bracket 12 threadedly connected thereto to move along the guide bar 432. The first bracket 12 drives the annular frame 11 to move, and the annular frame 11 drives the clamping bar 111 to move. By pushing the balance shaft 5 with the clamping bar 111, the height of the balance shaft 5 is adjusted.

[0051] Refer to Figures 3 - 5 : A rubber pad 1111 is provided on the clamping bar 111.

[0052] The present invention realizes the function of improving the clamping stability of the clamping bar 111 through the rubber pad 1111. When clamping the balance shaft 5 with the two clamping bars 111 on the annular frame 11, the contact area between the clamping bar 111 and the balance shaft 5 is increased through the deformation characteristics of the rubber pad 1111, and the rubber pad 1111 has good anti-slip performance. Furthermore, the clamping stability of the clamping bar 111 to the balance shaft 5 is improved.

[0053] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A positioning device for machining an automotive balance shaft (5), characterized in that, It includes a mounting bracket (1), an auxiliary control mechanism (2) and a rotary drive mechanism (3); There are two mounting brackets (1), and two annular brackets (11) are rotatably arranged on each mounting bracket (1), and two clamping bars (111) are movably arranged on each annular bracket (11); The auxiliary control mechanism (2) is arranged on the annular bracket (11), and the auxiliary control mechanism (2) is used to control the clamping bar (111) to translate on the annular bracket (11); The rotary drive mechanism (3) is used to drive the annular bracket (11) to rotate.

2. The positioning device for machining an automotive balance shaft (5) according to claim 1, characterized in that, The auxiliary control mechanism (2) includes a gas spring (21) and a limit component (22); The gas spring (21) is arranged on the annular bracket (11), and the piston rod (211) of the gas spring (21) is connected to the clamping bar (111); The limit component (22) is arranged on the annular bracket (11), and the limit component (22) is used to limit the movement of the clamping bar (111).

3. A positioning device for machining an automotive balance shaft (5) according to claim 1 or 2, characterized in that, The positioning device includes an adjusting mechanism (4), and the adjusting mechanism (4) includes a guide rail (41), a linear drive component (42) and a lifting component (43); Both of the two mounting brackets (1) are slidably mounted on the guide rail (41); The linear drive component (42) is arranged on the guide rail (41), and the linear drive component (42) is used to drive the mounting bracket (1) to slide along the guide rail (41); A first support (12) is arranged on the mounting bracket (1), and the annular bracket (11) is rotatably connected to the first support (12); The lifting component (43) is arranged on the mounting bracket (1), and the lifting component (43) is used to control the lifting of the first support (12).

4. A positioning device for machining an automotive balance shaft (5) according to claim 1, characterized in that, The rotary drive mechanism (3) includes a main rod (31), a toothed ring (32) and a rotary drive component (33); A rotary gear (311) is sleeved on the main rod (31); The toothed ring (32) is sleeved on the annular bracket (11), and the rotary gear (311) is meshed and connected with the toothed ring (32); The rotary drive component (33) is used to drive the main rod (31) to rotate.

5. A positioning device for machining an automotive balance shaft (5) according to claim 4, characterized in that, The rotary drive component (33) includes a connecting seat (331), a gantry (332) and a first rotary driver (333); The connecting seat (331) is arranged on the mounting bracket (1), and the rotary gear (311) is rotatably arranged on the connecting seat (331); A second support (3321) is arranged on the gantry (332), the second support (3321) is arranged on the gantry (332) in a liftable manner, and the second support (3321) is rotatably connected to the main rod (31); Two meshed bevel gears (33211) are arranged on the second support (3321), one of the bevel gears (33211) is sleeved on the main rod (31), and the other bevel gear (33211) is in transmission connection with the first rotary driver (333).

6. A positioning device for machining an automotive balance shaft (5) according to claim 2, characterized in that, The limit component (22) includes a mounting seat (221), a limit block (222), a control block (223) and a first elastic member (224); The mounting seat (221) is arranged on the annular bracket (11); The limit block (222) is slidably mounted on the mounting seat (221), and a slot (1112) matched with the limit block (222) is formed on the clamping bar (111); The control block (223) is movably arranged on the mounting seat (221); Both ends of the first elastic member (224) are respectively connected to the limit block (222) and the control block (223). The annular frame (11) is provided with a connecting rod (23) connected to the control block (223). A second elastic member (231) is provided on the connecting rod (23), and both ends of the second elastic member (231) are respectively connected to the connecting rod (23) and the annular frame (11).

7. A positioning device for machining an automotive balance shaft (5) according to claim 6, characterized in that, A linear motor for pushing the connecting rod (23) to move is built in the annular frame (11).

8. A positioning device for machining an automotive balance shaft (5) according to claim 3, characterized in that, The linear drive assembly (42) includes a second rotary driver (421) and a first screw rod (422). The second rotary driver (421) is arranged on the guide rail (41). The first screw rod (422) is rotatably arranged on the guide rail (41). The first screw rod (422) is provided with two thread segments with opposite spiral directions, and the two thread segments are respectively threadedly connected to the two mounting brackets (1).

9. A positioning device for machining an automotive balance shaft (5) according to claim 3, characterized in that, The lifting assembly (43) includes a second screw rod (431) and a guide bar (432). The second screw rod (431) is rotatably arranged on the mounting bracket (1), and the second screw rod (431) is threadedly connected to the first bracket (12). The mounting bracket (1) is provided with a guide bar (432), and the first bracket (12) is slidably matched with the guide bar (432). A motor for driving the second screw rod (431) to rotate is built in the mounting bracket (1).

10. A positioning device for machining an automobile balance shaft (5) according to claim 1, characterized in that, A rubber pad (1111) is provided on the clamping strip (111).

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