CN214517999U

CN214517999U - Gear ring turning clamp with axial positioning structure

Info

Publication number: CN214517999U
Application number: CN202120295120.4U
Authority: CN
Inventors: 徐树存; 夏宇; 焦继松; 吴江
Original assignee: Pacific Precision Powertrain Co ltd; Jiangsu Pacific Precision Forging Co Ltd
Current assignee: Pacific Precision Powertrain Co ltd; Jiangsu Pacific Precision Forging Co Ltd; Jiangsu Pacific Ocean Gear Transmission Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-10-29
Anticipated expiration: 2031-02-03

Abstract

The utility model discloses a ring gear car anchor clamps with axial positioning structure, it includes briquetting, first bolt, trilobal dish and second bolt. The pressing block is directly attached to the matched three-jaw chuck jaw and locked by the bolt A to form a self-centering clamping structure of the pressing block moving along with the radial direction of the three-jaw chuck jaw. The three-blade disc is positioned and installed in the middle of the end face of the three-jaw chuck with the clamping jaws, the three-blade disc and the three-jaw chuck are in locking connection through bolts B, three fan-shaped blades which radially extend out and are staggered with the clamping jaws of the three-jaw chuck are arranged on the three-blade disc, the radial outer edge of each fan-shaped blade is inwards bent in an angular direction according to the tooth tip size of a built-in combination gear of a gear ring, and an axial positioning structure for limiting the tooth tip of the combination gear built-in the gear ring is formed. The radial clamping structure and the axial positioning structure adopt a discrete mode, the positioning component does not bear clamping force structurally, and the gear ring is installed in place, namely, the gear ring is positioned axially.

Description

Gear ring turning clamp with axial positioning structure

Technical Field

The utility model belongs to the technical field of the machining anchor clamps technique a technical scheme, specifically say, the utility model relates to a car anchor clamps, especially a ring gear car anchor clamps with axial positioning structure.

Background

The gear ring is a duplicate gear consisting of an external gear and a combined gear, and is a necessary transmission component in an automobile gearbox. The gear box matched with the automobile has a very compact structure and a relatively small volume, and the matched gear ring is limited by the structure and the size, so the axial size is small. When the annular gear ring is used for production, the industry prefers to use a precision forging forming process to prepare a blank, and then only needs to carry out micro-finish turning on an inner hole and an end face. Because two gears arranged in the gear ring are both formed by precision forging, and the structure is limited, only the outer circular bead can be clamped when the inner hole is precisely turned. In order to avoid damaging the teeth, soft jaw pressure is usually used. Although the clamping mode is simple and convenient to operate, the necessary axial positioning is lacked, and the problem that the positioning accuracy is not good enough and part of tooth tips of the combined gear is cut by mistake due to slight deviation is solved except that the clamping reliability is poor in practical use. The built-in combined gear of the gear ring is not machined after precision forging because of the irregular shape of the tooth tip. If the tooth tip is cut by mistake, the engagement quality of the coupling gear is degraded. Therefore, when the inner hole of the gear ring is finely turned, the tooth tip of the built-in combined gear is used as an axial positioning reference, so that the gear ring can be prevented from being cut by mistake, and the machined gear ring can easily achieve the expected machining quality.

SUMMERY OF THE UTILITY MODEL

The utility model discloses mainly lack the problem to the built-in combination gear tooth point axial positioning of ring gear to prior art, provide a ring gear car anchor clamps with axial positioning structure, this anchor clamps comprise axial positioning structure and clamp structure jointly, owing to dispose corresponding component according to the function, overall structure is simple, the function is coordinated, the simple operation, accomplish axial pinpoint cons and radially press from both sides tightly reliably.

The utility model discloses a technical goal is realized to following technical scheme.

The gear ring turning clamp with the axial positioning structure comprises a pressing block, a bolt A, a three-blade disc and a bolt B. The pressing block is a rectangular block-shaped component made of soft metal, is directly attached to a jaw of the three-jaw chuck to be matched and is locked by a bolt A, and a self-centering clamping structure of the pressing block moving along with the radial direction of the jaw of the three-jaw chuck is formed. The improvement is that: the three-blade disc is positioned and installed in the middle of the end face of the three-jaw chuck with the clamping jaws, the three-blade disc and the three-jaw chuck are in locking connection through bolts B, three fan-shaped blades which radially extend out and are staggered with the clamping jaws of the three-jaw chuck are arranged on the three-blade disc, the radial outer edge of each fan-shaped blade is inwards bent in an angular mode according to the tooth tip size of a combined gear built in a workpiece gear ring, and therefore an axial positioning structure limited by the tooth tips of the combined gear built in the gear ring is formed.

As a further improvement scheme, the end part of the three blades, which is used for limiting the gear ring in the axial direction, is provided with a built-in combined gear tooth tip in a circular arc shape, and the radius R of curvature of the circular arc is 0.8-1.0 mm.

As a further improvement scheme, the wall thickness of the inward-facing angular bending edge of the fan-shaped blade radially extending out of the three-blade disc is different, wherein the annular groove is arranged to be thinned to 1.2-2.0 mm, and the annular groove is respectively arranged on the outer wall and the inner wall of the inward-facing angular bending edge.

As a further improvement, the annular groove of the three-bladed disk is only arranged on the outer wall or the inner wall which is bent inward and angled.

As a further improvement scheme, at least three through holes are uniformly distributed in the ring groove arranged in the three-blade disc on the same circular arc, the aperture of each through hole is 3.0-5.0 mm, and the edge distance between every two adjacent through holes is 5.0-10 mm.

Compared with the prior art, the utility model, following positive effect has:

1. the fixture is respectively provided with an axial positioning structure and a radial clamping structure of the gear ring, and a positioning element is structurally not directly subjected to clamping force, so that the functional component is separated in a mode, the structure is simple, the manufacture is easy, the operation is convenient and fast, and the set positioning precision can be kept for a long time;

2. three fixed-position discs are uniformly used as the axial positioning reference of the built-in combined gear tooth tips of the workpiece gear ring, and when the positioning structure is used, axial positioning can be realized as long as a workpiece is installed at a specified position;

3. because the tooth tips of the combined gears arranged in the workpiece gear ring have dimensional tolerance, in order to adapt to the positioning and installation of the gear rings with unequal dimensional tolerance, the end part of the tooth top joint of the three-blade disc and the combined gears arranged in the gear ring is made into an arc shape, and the positioning area is increased by utilizing a curved surface structure. On the other hand, the elastic deformation of the end part is utilized to offset the dimension error of the tooth tip, thereby achieving the purpose of improving the axial positioning precision.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view taken along line a-a of fig. 1, showing a connection structure of the pressing block and the jaw.

Fig. 3 is a schematic sectional view B-B of fig. 1 showing a three-bladed disk axial positioning arrangement.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a partially enlarged schematic view of an end portion K of the three-blade disc shown in fig. 3 for axially limiting the tooth tips of the built-in combination gear of the gear ring.

Detailed Description

The invention will be further explained with reference to the drawings and the examples.

The gear ring turning clamp provided with the axial positioning structure shown in figure 1 comprises a pressing block 1, an A bolt 2, a three-blade disc 3 and an B bolt 4. The pressing block 1 is used for clamping a workpiece gear ring 5 and is a rectangular block-shaped component made of soft metal, the workpiece gear ring 5 turned in the embodiment is matched with a car gearbox, and the manufactured pressing block 1 is made of silicon brass. In the turning clamp structure, a pressing block 1 is directly attached to a matched three-jaw chuck jaw and locked by an A bolt 2, so that a self-centering clamping structure of the pressing block 1 moving along with the radial direction of the three-jaw chuck is formed. The pressing block 1 shown in figure 2 directly presses the inner path outer shoulder of the gear ring 5, and the trisection pressing structure is uniform in stress and reliable in clamping. The three-blade disc 3 belongs to a positioning component in the structure, is positioned and installed in the middle of the end face of one side of the three-jaw chuck with the clamping jaws, is coaxial with the three-jaw chuck, and is positioned and locked and connected with the three-jaw chuck by using a bolt B4. The three-blade disc 3 is provided with three fan-shaped blades which radially extend out and are staggered with the jaw positions of the three-jaw chuck, and the radial outer edge of each fan-shaped blade is uniformly and angularly bent inwards according to the tooth tip size of the built-in combination gear of the gear ring 5, so that an axial positioning structure limited by the tooth tip of the built-in combination gear of the gear ring 5 is formed. In the structure, the radial clamping structure and the same positioning structure are respectively arranged, the positioning component is structurally realized without bearing clamping force, the functional component has a discrete mode, the structure is simple, the manufacture is easy, the operation is very convenient, and the set positioning precision can be kept for a long time.

In reality, the workpiece gear ring 5 is a semi-finished product formed by die pressing, the manufacturing precision of the workpiece gear ring is limited, and certain dimensional deviation objectively exists, and the dimensional deviation directly influences the axial positioning precision of a subsequent turning procedure. In order to further improve the axial positioning precision of the workpiece gear ring 5 matched with the three-blade disc 3, the tooth tip of the built-in combined gear of the workpiece gear ring 5 is not cut by mistake from the structure as far as possible, the elastic design is particularly added on the axial positioning end of the three-blade disc 3, and the influence of the size deviation of the workpiece gear ring 5 on the axial positioning is reduced by utilizing the elastic deformation. The structural design related to the aspect is mainly embodied in the following three aspects, firstly, the end part 3.1 of the three-blade disc 3, which is used for axially limiting the workpiece gear ring 5 and is internally combined with the gear tooth tip, is made into a circular arc (as shown in fig. 5), and the radius of curvature R of the circular arc is 0.8mm in the embodiment; secondly, the wall thickness of the inward angular bending edge of the fan-shaped blade extending out of the three-blade disc 3 in the radial direction is designed to be unequal in thickness, and the annular groove 3.2 is additionally arranged on the angular bending edge to locally reduce the wall thickness. The technical measure of increasing the elasticity by reducing the structural rigidity is reasonable and effective, and can meet the expected requirement. The embodiment is provided with two annular grooves 3.2 which are respectively arranged on the inner wall and the outer wall of the middle section of the angular bending edge (as shown in fig. 3 and 4), so that the wall thickness of the position is reduced to 1.2 mm. If the gear ring 5 with the specification larger than that of the embodiment is produced, the structural elasticity is required to be slightly larger, and the wall thickness of the middle section of the angular bending edge can only be reduced to 2.0 mm. The ring groove 3.2 can be simplified into one path except for the processing according to the inner and outer structures, and the ring groove 3.2 can be arranged on the outer wall and the inner wall and has the same technical effect. Thirdly, at least 3 through holes 3.3 (as shown in fig. 4) are uniformly distributed on the same circular arc by the ring groove 3.2 arranged in the three-blade disc 3, three through holes 3.3 with phi of 3.0mm are totally arranged in the embodiment, and the edge distance between the adjacent through holes 3.3 is determined to be 5 mm.

The utility model discloses unify three leaf dish 3 with the rigidity as the built-in combination gear tooth point axial positioning benchmark of work piece ring gear 5, as long as during the practical application workpiece mounting realizes axial positioning promptly to the assigned position, uses this kind of location structure not only swift but also accurate, can improve production efficiency several times.

Claims

1. A gear ring turning clamp with an axial positioning structure comprises a pressing block (1), an A bolt (2), a three-blade disc (3) and a B bolt (4); the pressing block (1) is a rectangular block-shaped component made of soft metal, is directly attached to a jaw of the three-jaw chuck to be matched and is locked by a bolt A (2), and a self-centering clamping structure of the pressing block (1) moving along with the radial direction of the jaw of the three-jaw chuck is formed; the method is characterized in that: the three-blade disc (3) is positioned and installed in the middle of the end face of the three-jaw chuck with the clamping jaws, the three-blade disc and the three-jaw chuck are in locking connection through bolts B (4), three fan-shaped blades which radially extend out and are staggered with the clamping jaws of the three-jaw chuck are arranged on the three-blade disc (3), the radial outer edge of each fan-shaped blade is bent inwards in an angular mode according to the tooth point size of a combined gear built in a workpiece gear ring (5), and an axial positioning structure limited by the tooth point of the combined gear built in the gear ring (5) is formed.

2. The ring gear turning jig provided with the axial positioning structure according to claim 1, characterized in that: the end (3.1) of the three-blade disc (3) used for limiting the gear ring (5) in the axial direction and internally provided with the tooth tip of the combined gear is arc-shaped, and the curvature radius R of the arc is 0.8-1.0 mm.

3. The ring gear turning jig provided with the axial positioning structure according to claim 1, characterized in that: fan-shaped blade that three leaf dish (3) radially stretched out inwards the angular limit wall thickness of bending, wherein be equipped with ring groove (3.2) department attenuate to 1.2 ~ 2.0mm, ring groove (3.2) are established respectively on the outer wall and the inner wall on the limit of bending inwards the angular.

4. The ring gear turning jig provided with the axial positioning structure according to claim 1 or 3, characterized in that: and the ring groove (3.2) configured on the three-blade disc (3) is only arranged on the outer wall or the inner wall which is bent inwards and angularly.

5. The ring gear turning jig provided with the axial positioning structure according to claim 1, characterized in that: at least three through holes (3.3) are uniformly distributed in a ring groove (3.2) arranged in the three-blade disc (3) on the same circular arc, the aperture of each through hole (3.3) is 3.0-5.0 mm, and the edge distance between every two adjacent through holes (3.3) is 5.0-10 mm.