CN212600342U

CN212600342U - Face milling clamp for valve rocker shaft support

Info

Publication number: CN212600342U
Application number: CN202020756163.3U
Authority: CN
Inventors: 刘瑛; 胡迪锋; 吴天浩
Original assignee: Hangzhou Vocational and Technical College
Current assignee: Hangzhou Vocational and Technical College
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2021-02-26
Anticipated expiration: 2030-05-09

Abstract

The utility model provides a milling surface clamp of a valve rocker shaft support, which comprises a base, wherein a first screw rod support, a first support seat, a second support seat and a second screw rod support are arranged on the base in parallel from left to right; the supporting parts are fixed on the front side and the rear side of the middle part of the base and comprise at least three supporting nails; the screw clamping mechanism comprises a screw rod, a first chuck and a second chuck, wherein the first chuck is left-handed on the screw rod, and the second chuck is right-handed on the screw rod; one end of the screw rod is screwed into the second screw rod support, and the other end of the screw rod penetrates through and extends out of the first screw rod support; the pressing plate is arranged above the spiral clamping mechanism, and the left end of the pressing plate is a fixed end and is hinged to the top of the first supporting seat; the right end is a movable end; an arch-shaped groove is formed on at least one side of the middle part of the pressing plate, and a pressing block is hinged in the arch-shaped groove; a hold-down mechanism; the fixture can avoid over-tight clamping to damage the smooth finish of the surface of the valve rocker shaft support, and the valve rocker shaft support cannot move or fall off in the face milling process.

Description

Face milling clamp for valve rocker shaft support

Technical Field

The utility model relates to a mill a anchor clamps, specifically speaking relates to a mill a anchor clamps of valve rocker shaft support.

Background

The valve rocker shaft support is an important part of a valve control system on a diesel engine, and as shown in figure 1, the valve rocker shaft support comprises a central hole for matching a rocker shaft, two extending parts are respectively arranged at two sides of the central hole, a side hole is arranged on each extending part, the hole depth of each side hole is perpendicular to the hole depth of the central hole, and thus, one side hole is used for installing an air inlet valve rocker and the other side hole is used for installing an air outlet valve rocker. The valve rocker shaft support is used as the main component of a valve transmission set in a diesel engine valve mechanism, and the processing technology level of the valve rocker shaft support is directly related to the stability of the diesel engine in operation and the service life of the diesel engine.

In the process of milling the surface of the shaft support of the valve rocker, a surface milling clamp is generally adopted to perform auxiliary positioning on the shaft support of the valve rocker so as to ensure the surface milling precision. Because the particularity of valve rocker shaft support structure itself, traditional mill face anchor clamps are less can carry out the centre gripping location to it, and when traditional mill face anchor clamps carried out the centre gripping to valve rocker shaft support, can have following problem: on one hand, the face milling clamp tightly clamps the valve rocker shaft support, so that the operation can surely prevent the valve rocker shaft support from deviating and walking, and the face milling of the valve rocker shaft support is better performed, however, the machined workpiece has higher defective rate due to the fact that the face milling clamp is too fastened to damage the smooth finish of the surface of the valve rocker shaft support; on the other hand, in order to better protect the smoothness of the valve rocker shaft support, the face milling clamp lightly clamps the valve rocker shaft support, however, the fastening force of the face milling clamp is insufficient, the workpiece may be shifted or dropped when the workpiece is milled, and potential safety hazards exist.

The milling surface clamp and the milling surface processing device are generally arranged on the same equipment, when any one of the milling surface clamp and the milling surface processing device breaks down, the whole processing equipment can not work continuously, and for the production of line production of factories, the production cost is improved, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a face anchor clamps that mills of valve rocker shaft bearing, this anchor clamps can avoid the centre gripping tension to damage the smooth finish on valve rocker shaft bearing surface, simultaneously, can not appear walking or dropping at the face in-process of milling.

Based on the above-mentioned purpose, the utility model provides a face anchor clamps should mill of valve rocker shaft bearing, should mill the face anchor clamps and include:

the screw rod support comprises a base, wherein a first screw rod support, a first support seat, a second support seat and a second screw rod support are arranged on the base in parallel from left to right;

the supporting parts are fixed on the front side and the rear side of the middle part of the base, comprise at least three supporting nails and are used for limiting the front end and the rear end of the valve rocker shaft support;

the screw clamping mechanism comprises a screw rod, a first chuck and a second chuck, wherein the first chuck is left-handed on the screw rod, and the second chuck is right-handed on the screw rod; one end of the screw rod is screwed into the second screw rod support, the other end of the screw rod penetrates through and extends out of the first screw rod support, and when the screw rod rotates, the first chuck and the second chuck are close to or far away from each other;

the pressing plate is arranged above the spiral clamping mechanism, and the left end of the pressing plate is a fixed end and is hinged to the top of the first supporting seat; the right end is a movable end, the fixed end can be used as a shaft for turning, and the inner side of the edge of the movable end is provided with a through hole; an arch-shaped groove is formed on at least one side of the middle part of the pressing plate, and a pressing block is hinged in the arch-shaped groove;

the pressing mechanism comprises a movable joint screw rod hinged to the top of the second supporting seat and a nut matched with the movable joint screw rod;

when the milling operation is carried out, the valve rocker shaft support is placed among the plurality of supporting nails, the lead screw is rotated to drive the first chuck and the second chuck to be close to each other, the first chuck and the second chuck are respectively abutted against the left side and the right side of the valve rocker shaft support, the pressing plate is turned rightwards, the through hole at the movable end of the pressing plate is sleeved on the movable joint screw rod, the nut is screwed, the pressing block on the pressing plate is pressed downwards at the top of the valve rocker shaft support, and the clamping and the positioning of the valve rocker shaft support can be realized.

Preferably, the first collet and the second collet are both block-shaped structures, the first collet is in surface contact with the left side wall of the valve rocker shaft support, and the second collet is in surface contact with the right side wall of the valve rocker shaft support.

Preferably, the first chuck and the second chuck are both screwed on the screw rod through nuts.

Preferably, a first hinge portion is disposed at a top portion of the first support base, and a fixed end of the pressing plate is hinged by the first hinge portion.

Preferably, a bushing is embedded in the side wall of the second screw support, and one end of the lead screw is screwed into the bushing.

Preferably, the screw clamping mechanism further comprises a rocker arm connected to the left end of the screw rod for assisting in driving the screw rod to rotate.

Preferably, the bottom of the base is formed with a plurality of mounting holes and at least one positioning key.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses the adjustable centre gripping dynamics to valve rocker shaft support avoids the too tight smooth finish that damages valve rocker shaft support surface of centre gripping, simultaneously, carries out full degree of freedom to valve rocker shaft support spacing, can not appear walking the position or dropping milling the face in-process.

Furthermore, the utility model has the advantages of simple overall structure, easy operation, structural stability is good.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic illustration of a valve rocker shaft mount;

FIG. 2 is a front view of the face milling fixture of the valve rocker shaft support in the embodiment of the present invention;

FIG. 3 is a schematic side view of a face milling fixture for a rocker shaft bearing of an embodiment of the present invention;

fig. 4 is a schematic top view of a face milling fixture of a valve rocker shaft support in an embodiment of the present invention.

Wherein, 1, a base; 2. a support pin; 3. pressing a plate; 4. a valve rocker shaft support;

11. a first screw support; 12. a first support base; 13. a second support seat; 14. a second screw support; 15. a bushing; 16. A positioning key;

31. an arcuate slot; 32. briquetting;

51. a lead screw; 52. a first chuck; 53. a second chuck;

131. and (4) an articulated screw rod.

Detailed Description

The present invention will be further described with reference to examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 2-4, a face milling fixture for a valve rocker shaft support, the face milling fixture comprising:

a base 1, wherein a first screw support 11, a first support 12, a second support 13 and a second screw support 14 are arranged on the base 1 in parallel from left to right;

the supporting parts are fixed on the front side and the rear side of the middle part of the base 1, and comprise at least three supporting nails 2 used for limiting the front end and the rear end of the valve rocker shaft support 4;

the screw clamping mechanism comprises a screw rod 51, a first chuck 52 and a second chuck 53, wherein the first chuck 52 rotates left on the screw rod 51, and the second chuck 53 rotates right on the screw rod 51; one end of the lead screw 51 is screwed into the second screw support 14, the other end of the lead screw 51 penetrates through and extends out of the first screw support 11, and when the lead screw 51 rotates, the first chuck 52 and the second chuck 53 approach or move away from each other;

the pressing plate 3 is arranged above the spiral clamping mechanism, and the left end of the pressing plate is a fixed end and is hinged to the top of the first supporting seat 12;

the right end is a movable end, the fixed end can be used as a shaft for turning, and the inner side of the edge of the movable end is provided with a through hole; an arch groove 31 is formed on at least one side of the middle part of the pressing plate 3, and a pressing block 32 is hinged in the arch groove 31;

the pressing mechanism comprises an articulated screw 131 hinged on the top of the second supporting seat 13 and a nut matched with the articulated screw 131;

when the face milling operation is carried out, the valve rocker shaft support 4 is placed among the plurality of support nails 2, the screw 51 is rotated to drive the first chuck 52 and the second chuck 53 to be close to each other, so that the first chuck 52 and the second chuck 53 are respectively abutted against the left side and the right side of the valve rocker shaft support 4, the pressing plate 3 is turned rightwards, a through hole at the movable end of the pressing plate is sleeved on the movable-joint screw 131, the nut is screwed, and the pressing block 32 on the pressing plate 3 is pressed downwards at the top of the valve rocker shaft support 4, so that the clamping and the positioning of the valve rocker shaft support 4 can be realized; after the face milling operation is completed, the nut on the movable joint screw 131 is unscrewed, the pressing plate 3 is turned leftwards, and the lead screw 51 is rotated in the opposite direction, so that the first chuck 52 and the second chuck 53 are away from each other, and the valve rocker shaft support 4 can be taken out.

As a preferred embodiment, as shown in fig. 2, the first collet 52 and the second collet 53 are both block-shaped structures, the first collet 52 is in surface contact with the left sidewall of the valve rocker shaft holder 4, and the second collet 53 is in surface contact with the right sidewall of the valve rocker shaft holder 4.

In a preferred embodiment, the first and

second chucks

52 and 53 are each screwed to the lead screw 51 by means of a nut.

In a preferred embodiment, a first hinge portion is provided at the top of the first supporting seat 12, and the fixed end of the pressing plate 3 is hinged by the first hinge portion.

In a preferred embodiment, a bushing 15 is embedded in a side wall of the second screw support 14, and one end of the screw 51 is screwed into the bushing 15.

In a preferred embodiment, the screw clamping mechanism further comprises a rocker arm (not shown in the figure) connected to the left end of the screw 51 for assisting in driving the screw 51 to rotate.

In a preferred embodiment, the bottom of the base 1 is formed with a plurality of mounting holes and at least one positioning key 16.

The utility model discloses the adjustable centre gripping dynamics to valve rocker shaft support avoids the too tight smooth finish that damages valve rocker shaft support 4 surface of centre gripping, simultaneously, carries out full degree of freedom to valve rocker shaft support spacing, can not appear walking or dropping milling the face in-process.

Further, it should be noted that:

in the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A face milling fixture for a valve rocker shaft support, comprising:

the screw rod supporting device comprises a base (1), wherein a first screw rod support (11), a first supporting seat (12), a second supporting seat (13) and a second screw rod support (14) are arranged on the base (1) from left to right in parallel;

the supporting parts are fixed on the front side and the rear side of the middle part of the base (1), and comprise at least three supporting nails (2) used for limiting the front end and the rear end of the valve rocker shaft support (4);

the screw clamping mechanism comprises a screw rod (51), a first chuck (52) and a second chuck (53), wherein the first chuck (52) rotates leftwards on the screw rod (51), and the second chuck (53) rotates rightwards on the screw rod (51); one end of the lead screw (51) is screwed into the second screw support (14), the other end of the lead screw (51) penetrates through and extends out of the first screw support (11), and when the lead screw (51) rotates, the first chuck (52) and the second chuck (53) are close to or far away from each other;

the pressing plate (3) is arranged above the spiral clamping mechanism, and the left end of the pressing plate is a fixed end and is hinged to the top of the first supporting seat (12); the right end is a movable end, the fixed end can be used as a shaft for turning, and the inner side of the edge of the movable end is provided with a through hole; an arch-shaped groove (31) is formed on at least one side of the middle part of the pressure plate (3), and a pressing block (32) is hinged in the arch-shaped groove (31);

the pressing mechanism comprises an articulated screw rod (131) hinged to the top of the second supporting seat (13) and a nut matched with the articulated screw rod;

when the milling operation is carried out, the valve rocker shaft support (4) is placed among the plurality of supporting nails (2), the first chuck (52) and the second chuck (53) are driven to be close to each other by rotating the lead screw (51) so as to be respectively abutted against the left side and the right side of the valve rocker shaft support (4), the pressing plate (3) is turned rightwards, the through hole of the movable end of the pressing plate is sleeved on the movable joint screw rod (131), the nut is screwed, the pressing block (32) on the pressing plate (3) is pressed downwards on the top of the valve rocker shaft support (4), and the clamping and the positioning of the valve rocker shaft support (4) can be realized.

2. The clamp for milling the surface of the valve rocker shaft support according to claim 1, wherein the first collet (52) and the second collet (53) are both block-shaped structures, the first collet (52) is in surface contact with the left side wall of the valve rocker shaft support (4), and the second collet (53) is in surface contact with the right side wall of the valve rocker shaft support (4).

3. The face milling fixture of a valve rocker shaft support according to claim 2, characterized in that the first collet (52) and the second collet (53) are both screwed onto the screw (51) by means of nuts.

4. The milling fixture of the valve rocker shaft support according to claim 1, characterized in that the top of the first support seat (12) is provided with a first hinge, through which the fixed end of the pressure plate (3) is hinged.

5. The face milling fixture for the shaft support of the valve rocker arm according to claim 1, characterized in that a bushing (15) is embedded in the side wall of the second screw support (14), and one end of the lead screw (51) is screwed into the bushing (15).

6. The face milling fixture of a valve rocker shaft support according to claim 1, characterized in that the screw clamping mechanism further comprises a rocker arm connected to the left end of the lead screw (51) for assisting in driving the lead screw (51) to rotate.

7. The clamp for milling the surface of the shaft support of the valve rocker arm according to claim 1, characterized in that the base (1) is formed with a plurality of mounting holes and at least one positioning key (16) at the bottom.