A fixing tool for machining automobile gear

Abstract

The utility model relates to fixing frock technical field, and disclose a kind of fixing frock for automobile gear processing, through setting motor, fixed frame, tensioner A, tensioner B and other structures realize the better accuracy centering clamping, first gear is placed in the outer ring of tensioner B, subsequently start motor, the output shaft of motor is driven mandrel rotation by coupling, mandrel rotation drives turntable B to carry out circumferential rotation when being located in disc groove B interior, turntable B rotates and is driven by arc groove B to pin head B, make upright plate B be located in the lateral sliding of sliding slot B outside, arc plate B gradually approaches the inner wall of gear when sliding, if the position of gear is not in center, then the arc plate B synchronously extended will touch the side close to first, the position of gear is stirred, make the center position of gear inner ring face and the center position of mandrel same, played the effect of centering tensioning.

Description

Technical Field

[0001] This utility model relates to the field of fixed tooling technology, and in particular to a fixed tooling for machining automotive gears. Background Technology

[0002] Most automotive components use gears to transmit power. A gear is a mechanical component with teeth on its rim that continuously meshes to transmit motion and power. During the manufacturing process, gears require fixtures to fix their position and prevent them from shifting during processing.

[0003] In the prior art, a gear processing fixture with publication number CN221210145U includes a frame and a fixing assembly. The fixing assembly includes a conical platform, a right-angle bracket, a hydraulic cylinder, a clamping cylinder, a slider, a support frame, a meshing disc, an adjusting component, and a driving component. The conical platform is fixedly connected to the frame and located on one side of the frame. The right-angle bracket is fixedly connected to the frame and located on the side of the frame near the conical platform. The hydraulic cylinder is mounted on the right-angle bracket and located on the side of the right-angle bracket near the conical platform. The clamping cylinder is fixedly connected to the output end of the hydraulic cylinder. The slider is slidably connected to the frame and located on the side of the frame near the conical platform. The meshing disc is mounted on the slider via the support frame, which supports the meshing disc. The adjusting component drives the meshing disc to rotate, and the driving component drives the slider to move. This design solves the problem of the gear having a curved side surface.

[0004] In the aforementioned patent, the gear is placed on a conical platform, and the conical surface of the platform guides the positioning of the gear's inner hole. Simultaneously, axial pressure is applied through a clamping cylinder, causing the end face of the gear's inner ring opening to contact a certain section of the conical column, forming a combination of axial clamping and radial centering. This centering and fixing method carries the risk of concentrated stress points. The concentrated high pressure from the conical platform and the clamping cylinder may cause indentations and marks on the edge of the gear's inner ring surface, damaging the accuracy of the inner wall reference. Furthermore, the contact area of ​​the conical column will experience localized wear due to long-term concentrated stress and relative sliding, forming grooves. This will reduce the contact area and exacerbate stress concentration. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fixed tooling for automotive gear processing, which has the advantages of high centering accuracy and wide applicability, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a fixed tooling for processing automotive gears, including a frame, a platform fixedly installed on the top of the frame, a motor fixedly installed at the bottom of the frame at a coaxial position with the platform, the output shaft of the motor being connected to a spindle via a coupling, a fixed frame fixedly installed on the top of the platform, the spindle being rotatably installed inside the platform and the fixed frame, and a tensioning device A and a tensioning device B installed on the outer ring of the fixed frame, wherein the overall dimensions of the tensioning device A are larger than the overall dimensions of the tensioning device B.

[0007] With the above structural setup, the inner ring of the gear is radially tensioned by the cooperation between the fixed frame and tensioning device A and tensioning device B. The radial clamping of the arc plate A or arc plate B is consistent with the direction of the radial cutting force generated during gear processing, such as hobbing or shaping, which can reduce the vibration displacement generated during processing.

[0008] Preferably, the fixing frame includes a base plate, a support, and a top frame. The base plate is fixedly installed on the top of the platform, and the support is fixedly connected to the top of the base plate. The tensioning device A is installed on the outer ring of the support, and the top frame is fixedly connected to the top of the support. The top frame includes a middle plate and a top column. The tensioning device B is installed on the outer ring of the top column. The top surface of the base plate and the bottom surface of the middle plate are both provided with grooves A, and the top column and the middle plate are symmetrically provided with grooves B.

[0009] With the above structural setup, the spindle rotates inside the fixed frame, driving the turntables A and B to rotate inside the slots A and B. The overall position of the fixed frame provides a reference position for tensioning device A and tensioning device B or gears.

[0010] Preferably, the tensioning device A includes an outer cylinder A and a sliding groove A. The outer cylinder A is fixedly sleeved on the outer ring of the bracket. The sliding groove A is evenly and uniformly formed in a circular shape inside the outer cylinder A and the bracket. A turntable A is rotatably installed inside the groove A of the tensioning device A. The turntable A is fixedly sleeved on the outer ring of the spindle. The surface of the turntable A is evenly and uniformly formed in a circular shape with an arc groove A. A vertical plate A is slidably installed inside the sliding groove A. Pins A are provided at both ends of the vertical plate A. The pins A are located inside the arc groove A, and the shape and size of the pins A and the arc groove A are adapted to each other. An arc plate A is provided on the end face of the vertical plate A on the outer ring of the outer cylinder A.

[0011] With the above structural design, when turntable A rotates, it moves pin A through arc groove A, causing pin A to drive vertical plate A to slide laterally inside slide groove A. When the outer surface of arc plate A contacts the inner arc surface of gear, the gear is clamped and fixed.

[0012] Preferably, the tensioning device B includes an outer cylinder B and a sliding groove B. The outer cylinder B is fixedly sleeved on the outer ring of the top column. The sliding groove B is evenly and uniformly formed in a circular shape inside the outer cylinder B and the top column. A turntable B is rotatably installed inside the groove B of the tensioning device B. The turntable B is fixedly sleeved on the outer ring of the mandrel. The surface of the turntable B is evenly and uniformly formed in a circular shape with an arc groove B. A vertical plate B is slidably installed inside the sliding groove B. Pins B are provided at both ends of the vertical plate B. The pins B are located inside the arc groove B, and the shape and size of the pins B and the arc groove B are adapted to each other. An arc plate B is provided on the end face of the vertical plate B on the outer ring of the outer cylinder B.

[0013] With the above structural design, the working principle of tensioning device B is the same as that of tensioning device A. The centering clamping device for gears in this device has a wider range of applications and can be adapted to complex gears.

[0014] This utility model has the following advantages:

[0015] 1. This fixed fixture for automotive gear processing achieves better centering and clamping accuracy through the setting of a motor, a fixed frame, tensioning device A, and tensioning device B. First, the gear is placed on the outer ring of tensioning device B. Then, the motor is started, and the output shaft of the motor drives the spindle to rotate through the coupling. When the spindle rotates, it drives the turntable B to rotate circumferentially inside the groove B. The rotation of the turntable B moves the pin head B through the arc groove B, causing the vertical plate B to slide laterally outward inside the slide groove B. When the arc plate B slides, it gradually approaches the inner wall of the gear. If the gear is not in the center, the arc plate B that extends synchronously will first touch the nearest side, moving the gear so that the center position of the inner ring surface of the gear is the same as the center position of the spindle, thus achieving the effect of centering and tensioning.

[0016] 2. This automotive gear machining fixture, through the installation of tensioning devices A and B, enables the tensioning of gears of different sizes. Tensioning devices A and B are used to tension and fix gears with different inner ring sizes, resulting in a wide clamping range and increased efficiency in practical applications. Furthermore, this fixture can be adapted to internal control surfaces with keyways or steps. By controlling the gear angle, arc plate A or arc plate B can be made to contact only the complete inner hole section, avoiding the groove area. Moreover, the tensioning of arc plate A and arc plate B does not require specific end faces of the gears, allowing for the tensioning of gears with incomplete end faces, such as gears with flanges, thus achieving a wide fixing range and high precision. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present utility model;

[0019] Figure 3This is a schematic diagram of the internal structure of the tensioning device of this utility model;

[0020] Figure 4 This is an exploded view of the tensioning device structure of this utility model.

[0021] In the diagram: 1. Frame; 2. Stand; 3. Motor; 31. Spindle; 4. Fixing frame; 41. Base plate; 42. Support; 43. Top frame; 44. Groove A; 45. Groove B; 5. Tensioning device A; 51. Outer cylinder A; 52. Slide groove A; 53. Turntable A; 54. Arc groove A; 55. Vertical plate A; 56. Pin head A; 57. Arc plate A; 6. Tensioning device B; 61. Outer cylinder B; 62. Slide groove B; 63. Turntable B; 64. Arc groove B; 65. Vertical plate B; 66. Pin head B; 67. Arc plate B. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-2 A fixed fixture for processing automotive gears includes a frame 1, a platform 2 fixedly mounted on the top of the frame 1, a motor 3 fixedly mounted on the bottom of the frame 1 at a coaxial position with the platform 2, the output shaft of the motor 3 being connected to a spindle 31 via a coupling, a fixed frame 4 fixedly mounted on the top of the platform 2, the spindle 31 being rotatably mounted inside the platform 2 and the fixed frame 4, and a tensioning device A5 and a tensioning device B6 mounted on the outer ring of the fixed frame 4, the overall dimensions of the tensioning device A5 being larger than the overall dimensions of the tensioning device B6.

[0024] In practical application, this device, through the cooperation between the fixed frame 4 and the tensioning devices A5 and B6, achieves radial tensioning of the gear inner ring via the arc plate A57 or arc plate B67. After starting the motor 3, the output shaft of the motor 3 drives the spindle 31 to rotate via the coupling. The spindle 31 drives the turntables A53 and B63 to rotate circumferentially within the grooves A44 and B45, respectively. When the turntables A53 and B63 rotate, the arc grooves A54 and B64 drive the vertical plates A55 and B65 to be located in the sliding groove A5. 2. Lateral sliding occurs inside the slide groove B62. When the outer arc surface of the arc plate A57 or arc plate B67 contacts the inner arc surface of the gear, the operation of the motor 3 is stopped, causing the arc plate A57 or arc plate B67 to be tightened on the inner arc surface of the gear. The gear achieves automatic centering through the movement of the arc plate A57 or arc plate B67, making the axis of the inner arc surface of the gear and the mandrel 31 the same axis. Furthermore, the radial clamping of the arc plate A57 or arc plate B67 is consistent with the direction of the radial cutting force generated during gear processing, such as hobbing or shaping, which can reduce vibration displacement generated during processing.

[0025] Please see Figures 1-4 The fixed frame 4 includes a base plate 41, a bracket 42, and a top frame 43. The base plate 41 is fixedly installed on the top of the platform 2. The bracket 42 is fixedly connected to the top of the base plate 41. The tensioning device A5 is installed on the outer ring of the bracket 42. The top frame 43 is fixedly connected to the top of the bracket 42. The top frame 43 includes a middle plate and a top column. The tensioning device B6 is installed on the outer ring of the top column. The top surface of the base plate 41 and the bottom surface of the middle plate are both provided with grooves A44. Grooves B45 are symmetrically provided between the top column and the middle plate.

[0026] The spindle 31 rotates inside the fixed frame 4 to drive the turntables A53 and B63, causing them to rotate inside the slots A44 and B45. The overall position of the fixed frame 4 provides a reference position for the tensioning device A5 and tensioning device B6 or the gear, so that the tensioning device A5 and tensioning device B6 can achieve automatic centering when radially clamping the fixed gear.

[0027] Please see Figures 1-4The tensioning device A5 includes an outer cylinder A51 and a sliding groove A52. The outer cylinder A51 is fixedly sleeved on the outer ring of the bracket 42. The sliding groove A52 is evenly and uniformly opened in a circular shape inside the outer cylinder A51 and the bracket 42. The tensioning device A5 has a turntable A53 rotatably installed inside the disc groove A44. The turntable A53 is fixedly sleeved on the outer ring of the spindle 31. The surface of the turntable A53 has an arc groove A54 evenly and uniformly opened in a circular shape. A vertical plate A55 is slidably installed inside the sliding groove A52. The two ends of the vertical plate A55 are provided with pins A56. The pins A56 are located inside the arc groove A54, and the shape and size of the pins A56 and the arc groove A54 are compatible. The end face of the vertical plate A55 is provided with an arc plate A57 on the outer ring of the outer cylinder A51. The arc plates A57 form a ring that fits against the outer surface of the outer cylinder A51.

[0028] When the turntable A53 rotates, it moves the pin head A56 through the arc groove A54, causing the pin head A56 to drive the vertical plate A55 to slide laterally inside the slide groove A52. The turntable A53 continues to rotate, and the vertical plate A55 drives the arc plate A57 to continuously approach the inner arc surface of the gear. When the outer surface of the arc plate A57 contacts the inner arc surface of the gear, the gear is clamped and fixed. Even though the tensioning device A5 clamps the gear in partial contact, it is an arc surface contact, and the contact area is 3 to 5 times larger than the linear contact of the conical platform. Under the same clamping force, the pressure is lower, reducing the stress concentration. In addition, this device has no axial force, avoiding bending or end face deformation of the gear due to axial pressure.

[0029] Please see Figures 1-4 The tensioning device B6 includes an outer cylinder B61 and a sliding groove B62. The outer cylinder B61 is fixedly sleeved on the outer ring of the top column. The sliding groove B62 is evenly and uniformly opened in a circular shape inside the outer cylinder B61 and the top column. The tensioning device B6 has a turntable B63 rotatably installed inside the groove B45. The turntable B63 is fixedly sleeved on the outer ring of the spindle 31. The surface of the turntable B63 has an arc groove B64 evenly and uniformly opened in a circular shape. A vertical plate B65 is slidably installed inside the sliding groove B62. The vertical plate B65 has pins B66 at both ends. The pins B66 are located inside the arc groove B64, and the shape and size of the pins B66 and the arc groove B64 are compatible. The end face of the vertical plate B65 is provided with an arc plate B67 on the outer ring of the outer cylinder B61. The arc plates B67 form a ring and fit against the outer surface of the outer cylinder B61.

[0030] The working principle of tensioning device B6 is the same as that of tensioning device A5. The difference is that the maximum clamping radius of tensioning device A5 is larger than that of tensioning device B6, but the minimum clamping radius of tensioning device A5 is smaller than that of tensioning device B6. The advantage of this setting is that tensioning device B6 is located above tensioning device A5 and is used to clamp smaller gears, while gears larger than the clamping radius of tensioning device B6 will slide smoothly to the outer ring of tensioning device A5 and then be clamped by tensioning device A5.

[0031] Compared to the conical platform and clamping cylinder clamping, the gear centering clamping device in this apparatus has a wider range of applications and can be adapted to complex gears. The conical platform is only suitable for gears with straight holes or small taper holes. This device can be adapted to gears with keyways or steps. By controlling the angle of the gear, the arc plate A57 or arc plate B67 can be made to contact only the complete inner hole section, avoiding the groove area. Furthermore, the tensioning of arc plate A57 and arc plate B67 does not require the end face of the gear, and can tension gears with incomplete end faces, such as gears with flanges.

[0032] Working principle: In use, the gear is first placed on the outer ring of tensioning device A5 or tensioning device B6. Depending on the gear's inner diameter, gears with smaller inner diameters will sit on the surface of the middle plate of the top frame 43, while gears with larger inner diameters will pass through the top frame 43 and sit on the surface of the bottom plate 41. When machining small-diameter gears, the gear is first placed on the outer ring of tensioning device B6, and then motor 3 is started. The output shaft of motor 3 drives the spindle 31 to rotate via a coupling. When the spindle 31 rotates, it drives the turntable B63 to rotate circumferentially inside the groove B45. The rotation of disc B63 moves the pin B66 through the arc groove B64, causing the vertical plate B65 to slide laterally outward inside the slide groove B62. As the arc plate B67 slides, it gradually approaches the inner wall of the gear. If the gear is not in the center, the arc plate B67 that extends synchronously will first touch the nearest side, moving the gear so that the center of the inner ring surface of the gear is the same as the center of the spindle 31. When all the arc plates B67 are in close contact with the inner ring surface of the gear, the operation of motor 3 is stopped, and the position of the gear is held in place by the tension of the arc plates B67.

[0033] When in use, this device can be used to tighten and fix gears with different inner ring sizes through tensioning devices A5 and B6, making the clamping range of this device wide and more efficient in practical applications.

Claims

1. A fixed fixture for machining automotive gears, comprising a frame (1), characterized in that: A platform (2) is fixedly installed on the top of the frame (1). A motor (3) is fixedly installed at the bottom of the frame (1) at the coaxial position of the platform (2). The output shaft of the motor (3) is connected to a spindle (31) via a coupling. A fixed frame (4) is fixedly installed on the top of the platform (2). The spindle (31) is rotatably installed inside the platform (2) and the fixed frame (4). Tensioning device A (5) and tensioning device B (6) are installed on the outer ring of the fixed frame (4). The overall size of tensioning device A (5) is larger than that of tensioning device B (6).

2. The fixed fixture for machining automotive gears according to claim 1, characterized in that: The fixed frame (4) includes a base plate (41), a bracket (42), and a top frame (43). The base plate (41) is fixedly installed on the top of the platform (2). The bracket (42) is fixedly connected to the top of the base plate (41). The tensioning device A (5) is installed on the outer ring of the bracket (42). The top frame (43) is fixedly connected to the top of the bracket (42). The top frame (43) includes a middle plate and a top column. The tensioning device B (6) is installed on the outer ring of the top column. The top surface of the base plate (41) and the bottom surface of the middle plate are both provided with a groove A (44). The top column and the middle plate are symmetrically provided with grooves B (45).

3. The fixed fixture for machining automotive gears according to claim 2, characterized in that: The tensioning device A (5) includes an outer cylinder A (51) and a sliding groove A (52). The outer cylinder A (51) is fixedly sleeved on the outer ring of the bracket (42). The sliding groove A (52) is evenly and circularly opened inside the outer cylinder A (51) and the bracket (42). The tensioning device A (5) is rotatably installed inside the disc groove A (44). The turntable A (53) is fixedly sleeved on the outer ring of the spindle (31). The surface of the turntable A (53) is evenly and circularly opened with an arc groove A (54). The vertical plate A (55) is slidably installed inside the sliding groove A (52). The vertical plate A (55) has pins A (56) at both ends. The pins A (56) are located inside the arc groove A (54), and the shape and size of the pins A (56) and the arc groove A (54) are compatible. The end face of the vertical plate A (55) is provided with an arc plate A (57) on the outer ring of the outer cylinder A (51).

4. The fixed fixture for machining automotive gears according to claim 3, characterized in that: The tensioning device B (6) includes an outer cylinder B (61) and a sliding groove B (62). The outer cylinder B (61) is fixedly sleeved on the outer ring of the top column. The outer cylinder B (61) and the top column are evenly provided with a sliding groove B (62) in a circular shape. The tensioning device B (6) is rotatably installed inside the groove B (45). The rotating disk B (63) is fixedly sleeved on the outer ring of the spindle (31). The surface of the rotating disk B (63) is evenly provided with an arc groove B (64) in a circular shape. The sliding groove B (62) is slidably installed with a vertical plate B (65). The two ends of the vertical plate B (65) are provided with pins B (66). The pins B (66) are located inside the arc groove B (64), and the shape and size of the pins B (66) and the arc groove B (64) are compatible. The end face of the vertical plate B (65) is provided with an arc plate B (67) on the outer ring of the outer cylinder B (61).

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