阅读说明：本技术 中心套车加工夹具 (Center sleeve turning clamp ) 是由 伍怀秋 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种中心套车加工夹具,包括连接盘、环形保持架和环形夹具体,环形保持架设置在连接盘上,环形保持架与连接盘旋转配合；保持架上设置有用于卡在中心套上齿槽中的夹持圆棒,夹持圆棒能在保持架径向上滑动；环形夹具体固定在连接盘上,环形夹具体的内孔上具有与夹持圆棒一一对应的螺旋面,螺旋面用于推动夹持圆棒沿环形保持架径向移动。本发明中心套车加工夹具通过与齿槽配合的夹持圆棒来夹紧固定中心套,使得中心套的齿圈节圆和花键孔在加工和检测两个工序中互为基准,从而避免了现有技术中以中心套齿圈外圆面作为车削花键孔的装夹定位基准会造成花键套齿圈节圆跳动误差大的技术问题。(The invention discloses a center sleeve turning clamp which comprises a connecting disc, an annular retainer and an annular clamp body, wherein the annular retainer is arranged on the connecting disc and is in rotating fit with the connecting disc; the retainer is provided with a clamping round bar which is clamped in a tooth groove on the center sleeve, and the clamping round bar can slide in the radial direction of the retainer; the annular clamp body is fixed on the connecting disc, a spiral surface which corresponds to the clamping round rods one to one is arranged on an inner hole of the annular clamp body, and the spiral surface is used for pushing the clamping round rods to move along the radial direction of the annular retainer. According to the center sleeve turning clamp, the center sleeve is clamped and fixed through the clamping round rod matched with the tooth grooves, so that the gear ring pitch circle and the spline hole of the center sleeve are mutually referenced in two working procedures of machining and detecting, and the technical problem that in the prior art, the spline sleeve gear ring pitch circle jumping error is large due to the fact that the outer circular surface of the gear ring of the center sleeve is used as the clamping and positioning reference for turning the spline hole is solved.)

1. Center cover car adds clamping apparatus, including the connection pad, its characterized in that: also comprises an annular retainer and an annular clamp body,

the annular retainer is arranged on the connecting disc and is in rotating fit with the connecting disc;

the retainer is provided with at least two clamping round rods which are used for being clamped in tooth grooves of the central sleeve, the clamping round rods are uniformly arranged along the circumferential direction of the retainer, and the clamping round rods can slide in the radial direction of the retainer;

the annular clamp is specifically fixed on the connection pad, has the helicoid with centre gripping pole one-to-one on the specific hole of annular clamp, the orthographic projection of helicoid on the plane of the specific axial lead of perpendicular to annular clamp is the plane helix, the helicoid is used for promoting centre gripping pole along annular holder radial movement.

2. The center sleeve turning jig according to claim 1, characterized in that: the contact part of the clamping round rod and the upper tooth surface of the central sleeve is positioned on the pitch circle of the gear ring.

3. The center sleeve turning jig according to claim 1, characterized in that: the annular retainer is provided with waist-shaped holes which correspond to the clamping round rods one by one, the hole length direction of each waist-shaped hole is consistent with the radial direction of the annular retainer, and the hole depth direction of each waist-shaped hole is parallel to the axial direction of the annular retainer;

one end of the clamping round rod penetrates through the waist-shaped hole and is in sliding fit with the waist-shaped hole, and the end part of the clamping round rod is provided with a backstop flange for preventing the clamping round rod from withdrawing from the waist-shaped hole;

the annular retainer is further provided with a blind hole, the hole depth direction of the blind hole is consistent with the radial direction of the annular retainer, and a spring with the end part abutting against the clamping round rod is arranged in the blind hole.

4. The center sleeve turning jig according to claim 1, characterized in that: an avoidance shallow groove for avoiding the clamping round bar is arranged on the inner hole surface of the annular clamp body, and the avoidance shallow groove is arranged at the end part of the spiral surface.

Technical Field

The invention relates to the technical field of clutches, in particular to a center sleeve turning clamp.

Background

The central sleeve is a main part in a wet clutch of the motorcycle, the middle part of the central sleeve is provided with a spline hole connected with a main shaft of an engine gearbox, and the outer cylindrical surface of the central sleeve is provided with a gear ring matched with a driven steel sheet. In the prior art, when a spline hole of a center sleeve is turned, a lathe clamping jaw clamps an outer circular surface of a gear ring of the center sleeve and then turns the spline hole by taking the outer circular surface of the gear ring of the center sleeve as a clamping and positioning reference. However, in the central sleeve detection stage, the spline hole is required to be used as a reference to detect the pitch circle runout of the central sleeve gear ring, and the spline inner hole is turned to be not the positioning reference of the central sleeve gear ring pitch circle, so that a large error can occur when the spline hole is used as the reference to detect the pitch circle runout of the central sleeve gear ring, and even the product quality is unqualified.

Disclosure of Invention

In view of this, the present invention aims to provide a center sleeve turning clamp to solve the technical problem that in the prior art, the clamping positioning reference using the outer circular surface of the center sleeve gear ring as the turning spline hole causes a large spline sleeve gear ring pitch run-out error.

The center sleeve turning clamp comprises a connecting disc, an annular retainer and an annular clamp body,

the annular retainer is arranged on the connecting disc and is in rotating fit with the connecting disc;

the retainer is provided with at least two clamping round rods which are used for being clamped in tooth grooves of the central sleeve, the clamping round rods are uniformly arranged along the circumferential direction of the retainer, and the clamping round rods can slide in the radial direction of the retainer;

the annular clamp is specifically fixed on the connection pad, has the helicoid with centre gripping pole one-to-one on the specific hole of annular clamp, the orthographic projection of helicoid on the plane of the specific axial lead of perpendicular to annular clamp is the plane helix, the helicoid is used for promoting centre gripping pole along annular holder radial movement.

Furthermore, the contact part of the clamping round rod and the upper tooth surface of the central sleeve is positioned on the pitch circle of the gear ring.

Furthermore, waist-shaped holes which correspond to the clamping round rods one to one are formed in the annular retainer, the hole length direction of each waist-shaped hole is consistent with the radial direction of the annular retainer, and the hole depth direction of each waist-shaped hole is parallel to the axial direction of the annular retainer;

one end of the clamping round rod penetrates through the waist-shaped hole and is in sliding fit with the waist-shaped hole, and the end part of the clamping round rod is provided with a backstop flange for preventing the clamping round rod from withdrawing from the waist-shaped hole;

the annular retainer is further provided with a blind hole, the hole depth direction of the blind hole is consistent with the radial direction of the annular retainer, and a spring with the end part abutting against the clamping round rod is arranged in the blind hole.

Furthermore, an avoidance shallow groove for avoiding the clamping round bar is arranged on the inner hole surface of the annular clamp body, and the avoidance shallow groove is arranged at the end part of the spiral surface.

The invention has the beneficial effects that:

1. when the spline inner hole of the central sleeve is turned, the central sleeve turning clamp clamps and fixes the central sleeve through the clamping round rod matched with the tooth groove, so that the gear ring pitch circle and the spline hole of the central sleeve are mutually the reference in two working procedures of processing and detecting, and the technical problem that the spline sleeve gear ring pitch circle jumping error is large due to the fact that the clamping positioning reference of the turning spline hole is the outer circular surface of the central sleeve gear ring in the prior art is solved.

2. According to the center sleeve turning clamp, the center sleeve of the clamping round rod clamp is pushed through the spiral surface with the orthographic projection being a planar spiral line, a workpiece is clamped and fixed when the center sleeve is rotated in the forward direction, the workpiece is prevented from loosening when the center sleeve is rotated in the reverse direction, the workpiece is convenient and rapid to assemble and disassemble, and the production efficiency is high.

Drawings

FIG. 1 is a schematic structural view of a center sleeve;

FIG. 2 is a schematic structural view of a center sleeve machining fixture;

FIG. 3 is a schematic view of a structure with a center mounted on a fixture;

FIG. 4 is a schematic cross-sectional view of the ring clamp body;

FIG. 5 is a schematic structural view of the annular cage;

fig. 6 is a schematic structural view of the ring clamp body.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in the figure, the center sleeve turning clamp comprises a connecting disc 1, and a bolt connecting hole is formed in the connecting disc so as to be connected with a lathe spindle.

The center sleeve machining clamp further comprises an annular retainer 2 and an annular clamp body 3.

The annular retainer is arranged on the connecting disc and is in rotating fit with the connecting disc. Specifically, the connection disc in this embodiment is provided with an annular sunken groove 4 for installing and positioning the annular retainer, and an inner hole of the annular retainer is provided with an arc-shaped positioning surface 5 which is rotationally matched with the wall surface of the inner cylindrical groove of the annular sunken groove. Of course, in different embodiments, the outer cylindrical groove wall surface of the annular sunken groove can be matched with the annular retainer for positioning the rotation center, and other structural forms can be adopted for realizing the rotation matching of the annular retainer and the connecting disc.

The retainer is provided with at least two clamping round rods 6 which are used for being clamped in tooth grooves in the center sleeve, the clamping round rods are evenly arranged along the circumferential direction of the retainer, and the clamping round rods can slide in the radial direction of the retainer. The number of clamping round rods is three in this embodiment, and the number of clamping round rods is preferably three or four in specific implementation.

The annular clamp is specifically fixed on the connection pad, has the helicoid 7 with centre gripping pole one-to-one on the specific hole of annular clamp, the orthographic projection of helicoid on the plane of the specific axial lead of perpendicular to annular clamp is the plane helix, and the specific rotation of plane helix is Archimedes' helix in this embodiment, the helicoid is used for promoting centre gripping pole along annular holder radial movement.

When turning center cover spline hole, with central suit on the centre gripping pole, the centre gripping pole is located the tooth's socket that center cover tooth circled, then the rotation center cover, the center cover drives centre gripping pole and annular holder and follows the rotation during rotation, and centre gripping pole 6 removes along the helicoid 7 that the annular holder is concrete in rotatory in-process, and the helicoid can be gradually with 6 inside promotes of centre gripping pole to it is fixed to make centre gripping pole press from both sides the fastening with the center cover. After the turning is finished, the turning is reversely rotated to the central sleeve, the clamping round rod loosens the central sleeve, the central sleeve can be taken down from the clamp, and the assembling and disassembling operation is simple and convenient.

Because this center cover car adds clamping apparatus presss from both sides tight fixed center cover through the centre gripping pole with tooth's socket complex for the ring gear pitch circle and the splined hole of center cover are each other for the benchmark in processing and two processes of detection, thereby avoided using the clamping location benchmark of center cover ring gear excircle conduct turning splined hole to lead to the fact the big technical problem of spline housing ring gear pitch circle error among the prior art.

As an improvement to the above embodiment, the contact part of the clamping round bar and the upper tooth surface of the center sleeve is located on the pitch circle of the gear ring, so that the pitch circle of the gear ring and the spline hole of the center sleeve can be better guaranteed to be mutually benchmark in two working procedures of machining and detection, and the size precision of the center sleeve product is improved.

As an improvement to the above embodiment, the annular retainer is provided with the waist-shaped holes 8 corresponding to the clamping round rods one to one, the hole length direction of each waist-shaped hole is consistent with the radial direction of the annular retainer, and the hole depth direction of each waist-shaped hole is parallel to the axial direction of the annular retainer.

One end of the clamping round rod penetrates through the waist-shaped hole and is in sliding fit with the waist-shaped hole, and the end part of the clamping round rod is provided with a backstop flange 61 for preventing the clamping round rod from withdrawing from the waist-shaped hole.

The annular retainer is further provided with a blind hole 9, the hole depth direction of which is consistent with the radial direction of the annular retainer, and a spring 10, the end part of which is pressed against the clamping round rod, is arranged in the blind hole.

In the improved structure, when the central sleeve is rotated forward, the clamping round bar can flexibly move along the hole length direction of the waist-shaped hole under the pushing of the spiral surface; when the center sleeve rotates reversely, the clamping round rod can quickly loosen the center sleeve under the thrust action of the spring. When no workpiece is installed, the clamping round rod is stably positioned at the outer end of the waist-shaped hole under the action of the thrust of the spring, so that the center sleeve can be conveniently inserted and installed on the clamping round rod when the center sleeve is installed.

As an improvement to the above embodiment, the inner hole surface of the annular clamp body is provided with a shallow avoidance groove 11 for avoiding the clamping round bar, and the shallow avoidance groove is arranged at the end of the spiral surface. In the specific implementation, the depth of the avoidance shallow groove is selected from 1.5-2.5mm, and the avoidance shallow groove is arranged, so that the clamping round bar can deviate towards the avoidance shallow groove when the central sleeve is installed, the installation of the central sleeve can be facilitated, and the clamping time can be shortened; meanwhile, the depth of the avoidance shallow groove is shallow, so that the clamping round bar can be easily withdrawn from the avoidance shallow groove and transferred to the spiral surface when the central sleeve is rotated.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.