CN220388091U - Brake rocker arm tooth pulling clamp - Google Patents

Abstract

The utility model discloses a brake rocker arm tooth-pulling clamp, which is characterized in that: comprises a fixed disc and a cutting; the fixed disc is provided with a clamp table, and the outer surface of the clamp table is provided with a cross groove; the center of the cross groove is provided with a first broach perforation which penetrates through the clamp table and the fixed disc simultaneously; the cross grooves comprise transverse grooves and longitudinal grooves which are mutually perpendicular and crossed; the cutting is inserted into the transverse groove for positioning, the brake rocker arm is inserted into the longitudinal groove for positioning, the middle part or the end part of the cutting is inserted into a side flat hole of the brake rocker arm, and a second broach through hole is formed in the cutting. The utility model can be used for positioning and clamping the brake rocker arm when the internal teeth are pulled, has low clamp cost and simple operation, can ensure that the hole position of the brake rocker arm is unchanged in the whole processing process, and can greatly improve the processing production efficiency.

Description

Brake rocker arm tooth pulling clamp

Technical Field

The utility model relates to a brake rocker arm tooth-pulling clamp.

Background

Referring to fig. 3-4, a brake rocker arm is shown, which is a key core component of a motorcycle brake system. The brake rocker arm N is provided with an internal tooth hole N-21 which is used for being matched and connected with the brake rocker arm shaft. During production, the brake rocker arm is firstly provided with a round hole N-2 (see fig. 1-2), and then is provided with a tooth pulling process to obtain an inner tooth hole N-21 (see fig. 3-4). The internal tooth holes of the brake rocker arm are used for increasing friction force and can prevent the brake rocker arm from relative rotation and loosening when being connected with the brake rocker arm shaft in a matched mode.

The prior known fixture is a practical problem that the fixture cannot be used for positioning and clamping the brake rocker arm when the inner tooth hole is machined by the aid of the brake rocker arm because the brake rocker arm N is a special-shaped piece when the round hole N-2 on the brake rocker arm is machined into the inner tooth hole N-21 (namely a tooth machining procedure).

Disclosure of Invention

The utility model provides a brake rocker arm tooth-pulling clamp, which solves the technical problem that the existing known clamp cannot be used for positioning and clamping when the brake rocker arm is used for processing an inner tooth hole.

In order to achieve the above purpose, the scheme of the utility model is as follows: the utility model provides a brake rocking arm tooth anchor clamps, its characterized in that: comprises a fixed disc and a cutting; the fixed disc is provided with a clamp table, and the outer surface of the clamp table is provided with a cross groove; the center of the cross groove is provided with a first broach perforation which penetrates through the clamp table and the fixed disc simultaneously; the cross grooves comprise transverse grooves and longitudinal grooves which are mutually perpendicular and crossed; the cutting is inserted into the transverse groove for positioning, the brake rocker arm is inserted into the longitudinal groove for positioning, the middle part or the end part of the cutting is inserted into the side flat hole of the brake rocker arm, and the cutting is provided with a second broach perforation. By adopting the technical scheme, the fixing disc of the clamp is fixed on the clamp workbench on the gear broaching machine in advance before use. During positioning and clamping, the cutting is inserted into the transverse groove for positioning; the brake rocker arm is inserted into the longitudinal groove for positioning, and then the middle part or the end part of the cutting is inserted into a side flat hole of the brake rocker arm, and because the brake rocker arm and the cutting are vertically distributed and mutually inserted and are respectively positioned in the longitudinal groove and the transverse groove, the brake rocker arm cannot slide and displace in the longitudinal groove, and the brake rocker arm is positioned and clamped and cannot displace, so that the rapid and accurate positioning and clamping of the brake rocker arm is realized. And during gear broaching, the broaching tool handle passes through the circular hole of the brake rocker arm, the second broaching tool perforation of the cutting and the first broaching tool perforation of the clamp table and then is in butt joint with the tool holder of the broaching machine (the butt joint fixation of the broaching tool handle and the tool holder of the broaching machine belongs to the prior art, so that the repeated description is omitted). And then starting the broaching machine to work and driving the broaching tool to axially feed and pull inwards, so as to machine the round hole on the brake rocker arm into an internal tooth hole. Therefore, the technical scheme can be used for positioning and clamping the brake rocker arm when the inner tooth holes are machined through tooth pulling, and is simple to operate and accurate in positioning.

Further, the fixed disc is provided with a mounting hole.

Preferably, the jig table is cylindrical.

Preferably, the cutting is made of ZGMn 13.

Further, the front end of the cutting is provided with a guide part.

Further, the clamp table and the fixed disc are of an integrated structure.

The utility model has the beneficial effects that:

the first, the clamp of the utility model adopts a structure different from the prior art, and can be specially used for positioning and clamping the brake rocker arm when the inner tooth hole is obtained by tooth pulling processing;

secondly, the clamp disclosed by the utility model has the advantages of low cost, low operation difficulty, extremely short clamping time, capability of keeping the hole position of the brake rocker unchanged in the whole machining process, capability of improving the machining production efficiency, capability of meeting the machining dimensional precision and the like;

thirdly, the front end of the cutting is provided with the guide part, so that the cutting can be conveniently and smoothly inserted into the side flat hole of the brake rocker arm, and the operation difficulty is reduced;

fourthly, the cutting after the gear-broaching processing can automatically drop and be removed from the cross groove, and meanwhile, the cutting and cleaning are very convenient.

Drawings

Fig. 1-2 are schematic structural views of a brake rocker arm when the brake rocker arm is a circular hole prior to tooth forming.

Fig. 3-4 are schematic structural views of a brake rocker arm after tooth forming to form an inner tooth hole.

Fig. 5 is a perspective view of a brake rocker arm tooth clamp according to a first embodiment of the present utility model when not clamped.

Fig. 6-7 are perspective views of a brake rocker arm tooth clamp according to a first embodiment of the present utility model when the brake rocker arm is positioned and clamped.

Fig. 8 is a perspective view of a brake rocker arm tooth holder according to a second embodiment of the present utility model.

Detailed Description

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

embodiment one: referring to fig. 5-6, a brake rocker arm tooth-pulling clamp comprises a fixed disc 1 and a cutting 2; the outer surface of the fixed disc 1 is provided with a clamp table 1-1.

Wherein, the outer surface of the clamp table 1-1 is provided with a cross groove 1-11; the center of the cross groove 1-11 is provided with a first broach perforation 1-12 which simultaneously penetrates through the clamp table 1-1 and the fixed disc 2; and the first broach holes 1-12 are provided for the broaches to pass through normally.

Wherein the cross grooves 1-11 comprise transverse grooves 1-111 and longitudinal grooves 1-112 which are mutually perpendicular and crossed; the cutting 2 is inserted into the transverse slot 1-111 and the brake rocker arm N is inserted into the longitudinal slot 1-112. Specifically, the external width of the cutting 2 is matched with the width of the transverse grooves 1-111; the width of the appearance of the brake rocker arm N is matched with the width of the longitudinal grooves 1-112.

The middle part or the end part of the cutting 2 is inserted into a side flat hole N-1 of the brake rocker arm N, and the cross section outline of the cutting 2 is matched with the cross section outline of the side flat hole N-1.

Wherein, the middle part of the cutting 2 is provided with a second broach through hole 2-1. And the second broach through hole 2-1 can be used for the broach to pass through normally.

Preferably, the inner diameters of the second broaching tool through hole 2-1 and the first broaching tool through hole 1-12 are larger than the inner diameter of the inner tooth hole N-21 after the brake rocker arm N is processed. That is, the inner diameters of the second broach through hole 2-1 and the first broach through hole 1-12 are larger than the outer diameter of the maximum end of the broach, so that the safe and normal passing of the broach (that is, the clearance passing and the non-contact passing) can be ensured.

Preferably, the jig table 1-1 is cylindrical. The clamp table 1-1 and the fixed disc 1 are of an integrated structure, and coaxiality can be ensured.

Preferably, the cutting 2 is made of ZGMn13 material. The cutting 2 is wear-resistant and high in hardness, can avoid easy loosening or vibration during processing due to too large fit clearance between the wear and the lateral flat holes N-1 of the transverse grooves 1-111 and the brake rocker arm N, can ensure the stability and reliability of the fit state of the clamp, ensures the processing quality and precision, and can prolong the service life of the clamp.

Further, a guiding part 2-2 is arranged at the front end of the cutting 2. The cutting 2 is easier to insert into the transverse groove 1-111 and the side flat hole N-1 of the brake rocker arm N, and the clamping efficiency can be improved.

The fixing plate 1 of the jig of the present embodiment is fixed in advance on a table elevation on a horizontal broaching machine (simply referred to as "broaching machine") before use (specifically, the fixing plate 1 may be fixed by welding or/and by a pressing mechanism).

During clamping, referring to fig. 6-7, the brake rocker arm N is inserted into the longitudinal slot 1-112 for positioning, then the cutting 2 is inserted from the left side of the transverse slot 1-111, then the cutting 2 is pushed to slide rightward in the transverse slot 1-111, the right end of the cutting 2 penetrates out of the side flat hole N-1 of the brake rocker arm N and then is inserted into the right side of the transverse slot 1-111, at this time, the cutting 2 is inserted into the transverse slot 1-111 and positioned at the left end and the right end, and meanwhile, the middle part of the cutting 2 penetrates into the side flat hole N-1 of the brake rocker arm N and makes the second broach perforation 2-1 and the round hole N-2 aligned to be concentric or basically concentric. Because the brake rocker arm N is vertically penetrated by the cutting 2, the brake rocker arm N cannot longitudinally slide in the longitudinal groove 1-112, is precisely restrained, positioned and fixed, and at the moment, a round hole N-2 (a part to be processed) of the brake rocker arm N is concentric with the position of the first broach through hole 1-1 just and the hole position cannot relatively shift. In addition, the workpiece is positioned and clamped accurately.

During processing, the broaching tool handle passes through the round hole N-2, the second broaching tool through hole 2-1 and the first broaching tool through hole 1-12 and then is in butt joint with the tool holder of the broaching machine (such as threaded connection, and the detachable butt joint of the broaching tool handle and the tool holder of the broaching machine belongs to the prior art, and belongs to direct purchasing equipment, so that the details are omitted). Then, the broaching machine is started to work and drives the broaching tool to axially feed and pull inwards (the broaching tool axially pulls inwards and does not rotate), and further the round hole N-2 on the brake rocker arm N is machined into an inner tooth hole N-21. In the whole tooth pulling process, the brake rocker arm N is accurately limited in the longitudinal grooves 1-112 and is always fixed, so that the hole position of the brake rocker arm is kept unchanged in the whole machining process, and the accurate machining requirement is met.

Therefore, the clamp can be used for positioning and clamping the brake rocker arm when the inner gear hole is machined through gear drawing, and has the advantages of being low in cost, low in operation difficulty, short in clamping time, capable of improving machining production efficiency, capable of meeting machining dimensional accuracy and the like.

Embodiment two: this embodiment is substantially the same as embodiment one, except that:

referring to fig. 8, a plurality of mounting holes 1-2 are provided in the fixed tray 1. In the present embodiment, the mounting hole 1-2 of the fixing plate 1 is detachably fixed to a jig table on a horizontal broaching machine (simply referred to as "broaching machine") by bolts. Therefore, the clamp can be replaced with clamps of different sizes according to different products or models.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (6)

1. The utility model provides a brake rocking arm tooth anchor clamps, its characterized in that: comprises a fixed disc (1) and an inserting strip (2);

the fixing disc (1) is provided with a clamp table (1-1), and a cross groove (1-11) is formed in the outer surface of the clamp table (1-1); the center of the cross groove (1-11) is provided with a first broach perforation (1-12) which penetrates through the clamp table (1-1) and the fixed disc (1) at the same time;

the cross grooves (1-11) comprise transverse grooves (1-111) and longitudinal grooves (1-112) which are mutually perpendicular and crossed;

the cutting (2) is inserted into the transverse grooves (1-111) for positioning, the brake rocker arm (N) is inserted into the longitudinal grooves (1-112) for positioning, the middle part or the end part of the cutting (2) is inserted into the side flat hole (N-1) of the brake rocker arm (N), and the cutting (2) is provided with a second broach through hole (2-1).

2. A brake rocker arm tooth clamp as defined in claim 1, wherein: the fixing plate (1) is provided with a mounting hole (1-2).

3. A brake rocker arm tooth clamp as defined in claim 1, wherein: the clamp table (1-1) is cylindrical.

4. A brake rocker arm tooth clamp as defined in claim 1, wherein: the cutting (2) is made of ZGMn13 material.

5. A brake rocker arm tooth clamp as defined in claim 1, wherein: the front end of the cutting (2) is provided with a guide part (2-2).

6. A brake rocker arm tooth clamp as defined in claim 1, wherein: the clamp table (1-1) and the fixed disc (1) are of an integrated structure.