Bevel gear circumferential positioning tool and bevel gear machining equipment

Abstract

The utility model discloses a bevel gear circumferential positioning tool and bevel gear machining equipment, and belongs to the field of bevel gear machining. According to the technical scheme, the circumferential positioning tool for the bevel gear comprises a tool body, a through hole is formed in the center of the tool body, a telescopic pin assembly is installed at the front end of the tool body, and when the telescopic pin assembly is in an extension state, the telescopic end protrudes out of the end face of the front end of the tool body. The tool has the advantages that the tool is matched with a tip of an existing device, when the bevel gear is clamped in a butting mode, the gear shaft end face of the bevel gear compresses the telescopic pin assembly, along with rotation of the tip, the telescopic pin assembly rebounds and stretches into a key groove when rotating to the position of the key groove of the gear shaft, positioning in the rotation direction is achieved, and the tool is simple and ingenious in structure, convenient to use and high in practicability. In the aspect of use, the cost is low, and installation on equipment is convenient.

Description

Technical Field

[0001] The utility model relates to the field of bevel gear processing, in particular to a bevel gear circumferential positioning tool and a bevel gear processing device. Background Art

[0002] In heavy-duty commercial vehicles, the axle is the main component in the vehicle transmission system. The axle includes a power input shaft, which transmits power to two half-shafts through a differential device and drives the wheels to rotate. In the differential, the bevel gear pair is the main transmission component, among which the driving bevel gear is connected to the power input shaft, and the two driven bevel gears on both sides are connected to the two half-shafts respectively.

[0003] In axle production, bevel gears must go through multiple processing steps such as heat treatment and gear grinding from the blank to the final product. Among them, material removal processing such as gear grinding is usually completed on machine tools. Specifically, the bevel gear is driven to rotate by the rotary motion of the machine tool so that each tooth of the bevel gear can be processed one by one.

[0004] In this process, the bevel gear needs to be positioned in the axial and rotational directions. The axial positioning is usually completed by quickly clamping the front and rear tops. On this basis, the rotational positioning is usually to install clamps, chucks and other devices on the front top (driving top) to clamp the gear shaft of the bevel gear. When clamping, it is generally necessary to manually lock the clamp or chuck, and the time taken each time is relatively random, which is not conducive to the automated operation of the production line with a highly fixed production beat. The use of automatic clamps, chucks and other devices requires high requirements for the modification of existing production line equipment, and the modification cost and equipment cost are also high. Utility Model Content

[0005] Aiming at the problem of high modification cost of bevel gear clamping and positioning equipment on the current bevel gear processing production line, the utility model provides a bevel gear circumferential positioning tool which is easy to manufacture and use and has lower cost.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a bevel gear circumferential positioning tool, including a tool body, a through hole is opened in the center of the tool body, and a telescopic pin assembly is installed at the front end of the tool body. When the telescopic pin assembly is in an extended state, the telescopic end protrudes from the front end face of the tool body. The tool cooperates with the top of the existing equipment. When the bevel gear is clamped against the top, the end face of the gear shaft of the bevel gear compresses the telescopic pin assembly. As the top rotates, the telescopic pin assembly rotates to the keyway position of the gear shaft and rebounds and extends into the keyway to achieve positioning in the rotation direction. The tool structure is simple and ingenious, easy to use, low cost, and easy to install on the equipment.

[0007] Preferably, a mounting hole is axially opened on the front end face of the tooling body, the telescopic pin assembly is installed in the mounting hole, the telescopic pin assembly includes a spring and a pin body, the pin body is slidably inserted in the mounting hole, the spring is located between the bottom of the mounting hole and the pin body, and an axial limiting structure is also provided between the telescopic pin assembly and the tooling body.

[0008] Preferably, the axial limiting structure includes a limiting groove arranged on the pin body, the limiting groove is arranged on the outer peripheral surface of the pin body and extends along the axial direction of the pin body, the tool body is provided with a threaded hole, a limiting bolt is installed in the threaded hole, and the screw end of the limiting bolt extends into the limiting groove. The end of the limiting bolt is located in the limiting groove, and when the pin body extends to a certain length, the limiting bolt contacts the rear end wall of the limiting groove to prevent the pin body from falling out of the mounting hole.

[0009] Preferably, the end of the screw rod of the limiting bolt has a protruding portion, the protruding portion is cylindrical and has a smooth arc surface, and the protruding portion extends into the limiting groove. The end of the limiting bolt is provided with a smooth cylindrical structure to prevent wear of the limiting groove and make relative sliding smoother.

[0010] Preferably, the diameter of the forward extension is smaller than the width of the limiting groove, and there is a certain gap between the end surface of the forward extension and the bottom of the limiting groove, so as to reduce the friction between the forward extension and the limiting groove and make the pin body rebound and retract more smoothly.

[0011] Preferably, the front end of the pin body has a positioning portion, and the two side surfaces of the positioning portion are parallel planes and fit with the plane of the keyway groove wall to prevent it from falling out.

[0012] Preferably, the spring is a coil spring, the rear end face of the pin body is provided with a buried hole, and the front end of the spring extends into the buried hole. The spring is guided for extension and contraction.

[0013] Preferably, the telescopic pin assembly is provided with multiple groups, and the multiple groups of telescopic pin assemblies are evenly distributed around the circumference of the through hole. Providing multiple groups of telescopic pin assemblies reduces the rotation angle of the pin body to the keyway, and positioning is faster.

[0014] On the other hand, the utility model also provides a bevel gear processing equipment, including a driving top and a top clamping top, the driving top is fixedly mounted with the above-mentioned bevel gear circumferential positioning tooling, the driving top is located in the central through hole of the tooling body, and the through hole is coaxially arranged with the driving top.

[0015] Preferably, the front end of the driving tip protrudes from the front end surface of the tooling body.

[0016] It can be seen from the above technical scheme that the advantages of the utility model are: the scheme provides a bevel gear circumferential positioning tool with a simple and ingenious structure, which positions the bevel gear in the rotation direction. The fixing process utilizes the elastically retractable pin body to cooperate with the gear shaft keyway of the bevel gear, and utilizes the processing equipment's own rotation drive process for positioning. After it is in place, the pin body automatically pops out, and the positioning process is fast; through the structural design of the elastic pin assembly, the expansion and contraction is smoother and the positioning effect is good; furthermore, the bevel gear processing equipment provided by the utility model can automatically clamp and position the bevel gear, and the modification and use costs are lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the pin body in a specific implementation manner of the utility model.

[0020] Description of main reference numerals

[0021] 1. Tool body, 1-1. Mounting hole, 2. Spring, 3. Pin body, 3-1. Limiting groove, 3-2. Positioning part, 4. Limiting bolt, 5. Gear shaft, 6. Driving top. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] Embodiment 1

[0024] like Figure 1 As shown, a bevel gear circumferential positioning tool is defined as the front side of the tool (i.e., the bevel gear), i.e. Figure 1The right side in the figure is the front, and the processing tooling includes a tooling body 1, a through hole is opened in the center of the tooling body 1, and a telescopic pin assembly is installed on the front end face of the tooling body 1. Specifically, a mounting hole 1-1 is opened on the front end face of the tooling body 1, and the telescopic pin assembly is installed in the mounting hole 1-1. The mounting hole 1-1 is a buried hole, and the telescopic pin assembly includes a spring 2 and a pin body 3. The spring 2 is located at the bottom of the mounting hole 1-1. The spring 2 adopts a coil spring, and the pin body 3 is inserted into the mounting hole 1-1 and is located in front of the spring 2. A buried hole is opened at the rear end of the pin body 3, and the front section of the spring 2 penetrates into the buried hole at the rear end of the pin body 3 and abuts against the bottom of the buried hole, so that the spring 2 pushes the pin body 3 forward, and when the spring is in a naturally extended state, the front end of the pin body 3 extends out of the mounting hole and is located in front of the front end of the tooling body 1.

[0025] like Figure 2 As shown, the pin body 3 is a cylindrical pin as a whole, and the front end is processed into a positioning portion 3-2. The positioning portion 3-2 is a trapezoidal platform structure, and the side of the outer peripheral surface close to the tooling body 1 is an inclined surface, and the opposite surface of the inclined surface is continuous with the cylindrical surface of the cylindrical pin, and the adjacent surfaces of the inclined surface are planes and are both perpendicular to the inclined surface.

[0026] An axial limit structure is also provided between the telescopic pin assembly and the tooling body. Figure 2 The axial limiting structure includes a limiting groove 3-1 arranged on the pin body 3, the limiting groove 3-1 is arranged on the front of the outer circumferential surface of the pin body 3 and extends along the axial direction of the pin body 3, a threaded hole is provided on the tooling body, and a limiting bolt 4 is installed in the threaded hole. The screw end of the limiting bolt 4 has a forward extension portion, the forward extension portion is cylindrical and the outer circumferential surface is a smooth surface, the forward extension portion extends into the limiting groove 3-1, and at the same time, the diameter of the forward extension portion is smaller than the groove width of the limiting groove 3-1, and there is a certain gap between the end face of the forward extension portion and the groove bottom of the limiting groove 3-1.

[0027] Furthermore, multiple groups of telescopic pin assemblies can be provided, and the multiple groups of telescopic pin assemblies are evenly distributed around the circumference of the through hole, such as in Figure 1 In the illustrated embodiment, the telescopic pin assembly is provided in two groups, which are arranged around the through hole at intervals of 180 degrees. In other embodiments, it can also be provided in one group or more.

[0028] Embodiment 2

[0029] Based on the bevel gear circumferential positioning tool provided in the first embodiment, this embodiment further provides a bevel gear processing device, including a driving top 6 and a top top for top clamping, and the bevel gear circumferential positioning tool described in the first embodiment is fixedly installed on the driving top 6. Figure 1As shown, the driving center 6 is coaxially inserted into and passes through the central through hole of the tooling body 1, and the front end of the center point protrudes from the front end surface of the tooling body 1, and the tooling body is fixedly connected to the main shaft of the processing equipment (the center point is located at the front end of the main shaft, which is the conventional structure of the driving center point on the machine tool). For example, a flange structure is set on the rear end of the tooling body and the main shaft, and the two are installed by bolt connection or the like.

[0030] The use process of the utility model is that the handling equipment (such as a manipulator, etc.) on the production line moves the bevel gear to be processed between the driving top and the opposing top of the processing equipment, and makes the gear shaft 5 of the bevel gear located at the position of the driving top, and then the tip of the driving top is against the tapered hole of the rear end face of the gear shaft 5. At this time, if the telescopic pin assembly and the keyway on the gear shaft 5 are misaligned in the circumferential direction, the end face of the gear shaft 5 will press the telescopic pin into the mounting hole of the tooling body. At this time, the handling equipment keeps clamping the bevel gear, and then the processing equipment drives the driving top to rotate together with the tooling body. At this time, the bevel gear remains stationary on the handling equipment, and when the telescopic pin assembly rotates to the keyway position, the pin body pops out and is stuck in the keyway. At this time, the handling equipment releases the workpiece, and under the surface contact between the pin body and the front end positioning portion and the keyway, the bevel gear rotates synchronously with the main shaft of the processing equipment, thereby realizing the positioning and clamping in the rotation direction.

[0031] It can be seen from the above embodiments that the beneficial effect of the utility model is that the present scheme provides a bevel gear circumferential positioning tool with a simple and ingenious structure, which positions the bevel gear in the rotation direction. The fixing process utilizes an elastically retractable pin body to cooperate with the gear shaft keyway of the bevel gear, and utilizes the processing equipment's own rotation drive process for positioning. After being in place, the pin body automatically pops out, and the positioning process is fast; through the structural design of the elastic pin assembly, the expansion and contraction is smoother and the positioning effect is good; furthermore, the bevel gear processing equipment provided by the utility model can automatically clamp and position the bevel gear, and the modification and use costs are lower.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bevel gear circumferential positioning tool, comprising a tool body (1), characterized in that: A through hole is provided at the center of the tool body (1), and a telescopic pin assembly is installed at the front end of the tool body (1); when the telescopic pin assembly is in an extended state, the telescopic end protrudes from the front end surface of the tool body.

2. The bevel gear circumferential positioning tool according to claim 1, characterized in that: A mounting hole (1-1) is axially provided on the front end surface of the tooling body (1), the telescopic pin assembly is mounted in the mounting hole (1-1), the telescopic pin assembly comprises a spring (2) and a pin body (3), the pin body (3) is slidably inserted in the mounting hole (1-1), the spring (2) is located between the bottom of the mounting hole (1-1) and the pin body (3), and an axial limiting structure is also provided between the telescopic pin assembly and the tooling body.

3. The bevel gear circumferential positioning tool according to claim 2, characterized in that: The axial limiting structure comprises a limiting groove (3-1) arranged on the pin body (3); the limiting groove (3-1) is arranged on the outer peripheral surface of the pin body (3) and extends along the axial direction of the pin body (3); a threaded hole is provided on the tool body, a limiting bolt (4) is installed in the threaded hole, and the screw end of the limiting bolt (4) extends into the limiting groove (3-1).

4. The bevel gear circumferential positioning tool according to claim 3, characterized in that: The end of the screw rod of the limiting bolt (4) has a forward extension portion, the forward extension portion is cylindrical and has a smooth outer surface, and the forward extension portion extends into the limiting groove (3-1).

5. The bevel gear circumferential positioning tool according to claim 4, characterized in that: The diameter of the forward extension portion is smaller than the width of the limiting groove (3-1), and there is a certain gap between the end surface of the forward extension portion and the bottom of the limiting groove (3-1).

6. The bevel gear circumferential positioning tool according to claim 2, characterized in that: The front end of the pin body (3) is provided with a positioning portion (3-2), and two side surfaces of the positioning portion (3-2) are planes parallel to each other.

7. The bevel gear circumferential positioning tool according to claim 2, characterized in that: The spring (2) is a coil spring, the rear end surface of the pin body (3) is provided with a buried hole, and the front end of the spring (2) extends into the buried hole.

8. The bevel gear circumferential positioning tool according to any one of claims 1 to 5, characterized in that: The telescopic pin assemblies are provided in multiple groups, and the multiple groups of telescopic pin assemblies are evenly distributed around the circumference of the through hole.

9. A bevel gear processing device, comprising a driving center (6) for top clamping and a top center, characterized in that: The bevel gear circumferential positioning tool as claimed in any one of claims 1 to 8 is fixedly mounted on the driving tip (6), and the driving tip (6) is located in the central through hole of the tool body (1), and the through hole and the driving tip (6) are coaxially arranged.

10. The bevel gear processing equipment according to claim 9, characterized in that: The front end of the driving tip (6) protrudes from the front end surface of the tooling body (1).

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