阅读说明：本技术 一种摩托车发动机曲轴的磨削加工夹具 (Grinding clamp for motorcycle engine crankshaft ) 是由 鲁金忠 唐小军 金星 王钊 罗开玉 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种摩托车发动机曲轴的磨削加工夹具,包含一第一夹具和一第二夹具,所述的第一夹具包含一圆形的第一连接盘,所述的第一连接盘的端面一侧设有一可活动的“L”字型的液压卡爪和一第一下夹具基座,所述的第一下夹具基座的内侧设有一倾斜的斜面滑块,所述的第二夹具包含一圆形的的第二连接盘,所述的第二连接盘的端面上设有一可拆卸的半圆筒状的第二下夹具基座和一第二上弧形盖板,所述的第二下夹具基座上设有一可拆卸的角位位移传感器。本发明的摩托车发动机曲轴的磨削加工夹具具有以下优点：1.可实现在一次装夹下磨削曲轴所有连杆颈和主轴颈；2.能够大大提高生产效率,有效的保证加工精度,无需专业技能型操作工人。(The invention discloses a grinding clamp of a motorcycle engine crankshaft, which comprises a first clamp and a second clamp, wherein the first clamp comprises a circular first connecting disc, one side of the end surface of the first connecting disc is provided with a movable L-shaped hydraulic clamping jaw and a first lower clamp base, the inner side of the first lower clamp base is provided with an inclined slide block, the second clamp comprises a circular second connecting disc, the end surface of the second connecting disc is provided with a detachable semi-cylindrical second lower clamp base and a second upper arc-shaped cover plate, and the second lower clamp base is provided with a detachable angular displacement sensor. The grinding clamp for the motorcycle engine crankshaft has the following advantages: 1. all connecting rod necks and main journals of the crankshaft can be ground under one-time clamping; 2. the production efficiency can be greatly improved, the machining precision is effectively guaranteed, and professional skill type operators are not needed.)

1. The grinding clamp for the motorcycle engine crankshaft is characterized by comprising a first clamp (M1) and a second clamp (M2),

the first clamp (M1) comprises a first circular connecting disc (1), a plurality of first connecting pin holes (2) are formed in the edge of the first connecting disc (1), a movable L-shaped hydraulic clamping jaw (4) is arranged on one side of the end face of the first connecting disc (1), a first detachable semi-cylindrical lower clamp base (3) is arranged on the other side of the end face of the first connecting disc (1), an inclined slide block (6) is arranged on the inner side of the first lower clamp base (3), a first detachable arc-shaped upper arc-shaped cover plate (8) is arranged on the first lower clamp base (3), a first detachable V-shaped block (10) is arranged on the inner wall of the first upper arc-shaped cover plate (8), and the first V-shaped block (10) is fixedly connected with the first upper arc-shaped cover plate (8) through a pair of first adjusting bolts (9),

the second clamp (M2) comprises a circular second connecting disc (12), a plurality of second connecting pin holes (13) are formed in the edge of the second connecting disc (12), a detachable semi-cylindrical second lower clamp base (14) is arranged on the end face of the second connecting disc (12), a detachable arc-shaped second upper arc-shaped cover plate (15) is arranged on the second lower clamp base (14), a detachable second V-shaped block (171) is arranged on the inner wall of the second upper arc-shaped cover plate (15), the second V-shaped block (171) is fixedly connected with the second upper arc-shaped cover plate (15) through a pair of second adjusting bolts (17), a connecting sleeve (18) is arranged on the inner side of the second upper arc-shaped cover plate (15), a threaded hole (20) is formed in the side wall of the connecting sleeve (18), and an indexing gear (19) is arranged at the tail end of the connecting sleeve (18), a detachable angular displacement sensor (23) is arranged on the second lower clamp base (14), the angular displacement sensor (23) is fixedly connected with the second lower clamp base (14) through a pair of sensor screws (21),

the indexing gear (19) is meshed with a driving gear, the driving gear is meshed with a driving shaft, and the driving shaft is connected to an output shaft of a stepping motor through a coupler.

2. The grinding jig for the crankshaft of the motorcycle engine as claimed in claim 1, wherein the first lower jig base (3) is fixedly connected to the first connecting plate (1) by a plurality of first lower jig screws (5), and the second lower jig base (14) is fixedly connected to the second connecting plate (12) by a plurality of second lower jig screws (22).

3. The grinding fixture of the motorcycle engine crankshaft according to claim 1, characterized in that a pair of first upper arc-shaped screws (7) are respectively arranged at two ends of the first upper arc-shaped cover plate (8), and a pair of second upper arc-shaped screws (16) are respectively arranged at two ends of the second upper arc-shaped cover plate (15).

Technical Field

The invention relates to a crankshaft machining tool, in particular to a grinding clamp for a crankshaft of a motorcycle engine.

Background

The crankshaft is the most important component in the engine. It takes the force from the connecting rod and converts it into torque to be output by the crankshaft and drive other accessories on the engine. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, gas inertia force of periodic variation and reciprocating inertia force, so that the crankshaft is subjected to the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well. In the existing grinding process of the crankshaft, a connecting rod neck and a main journal of the crankshaft need to be clamped and ground respectively, time and labor are wasted, and the precision is difficult to ensure.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art, and provides a grinding clamp for a crankshaft of a motorcycle engine.

The technical problem of the invention is mainly solved by the following technical scheme:

the grinding clamp for the motorcycle engine crankshaft is characterized by comprising a first clamp and a second clamp,

the first clamp comprises a circular first connecting disc, a plurality of first connecting pin holes are arranged at the edge of the first connecting disc, a movable L-shaped hydraulic clamping jaw is arranged on one side of the end surface of the first connecting disc, a detachable semi-cylindrical first lower clamp base is arranged on the other side of the end surface of the first connecting disc, an inclined slide block is arranged on the inner side of the first lower clamp base, a detachable arc-shaped first upper arc-shaped cover plate is arranged on the first lower clamp base, a detachable first V-shaped block is arranged on the inner wall of the first upper arc-shaped cover plate and fixedly connected with the first upper arc-shaped cover plate through a pair of first adjusting bolts,

the second clamp comprises a circular second connecting disc, a plurality of second connecting pin holes are formed in the edge of the second connecting disc, a detachable semi-cylindrical second lower clamp base is arranged on the end face of the second connecting disc, a detachable arc-shaped second upper arc cover plate is arranged on the second lower clamp base, a detachable second V-shaped block is arranged on the inner wall of the second upper arc cover plate and fixedly connected with the second upper arc cover plate through a pair of second adjusting bolts, a connecting sleeve is arranged on the inner side of the second upper arc cover plate, a threaded hole is formed in the side wall of the connecting sleeve, an indexing gear is arranged at the tail end of the connecting sleeve, a detachable angular displacement sensor is arranged on the second lower clamp base and fixedly connected with the second lower clamp base through a pair of sensor screws,

the indexing gear is meshed with a driving gear, the driving gear is meshed with a driving shaft, and the driving shaft is connected to an output shaft of a stepping motor through a coupler.

As a preferred embodiment of the present invention, the first lower clamp base is fixedly connected to the first connection plate by a plurality of first lower clamp screws, and the second lower clamp base is fixedly connected to the second connection plate by a plurality of second lower clamp screws.

As a preferred embodiment of the present invention, a pair of first upper arc-shaped screws are respectively disposed at two ends of the first upper arc-shaped cover plate, and a pair of second upper arc-shaped screws are respectively disposed at two ends of the second upper arc-shaped cover plate.

The grinding clamp for the motorcycle engine crankshaft has the following advantages: 1. all connecting rod necks and main journals of the crankshaft can be ground under one-time clamping; 2. the production efficiency can be greatly improved, the machining precision is effectively guaranteed, and professional skill type operators are not needed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the clamping and positioning of the grinding fixture for motorcycle engine crankshafts;

FIG. 2 is a schematic view of a first jig of the grinding jig for the crankshaft of the motorcycle engine shown in FIG. 1;

FIG. 3 is a schematic structural view of a second fixture of the grinding fixture for the crankshaft of the motorcycle engine shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a first V-shaped pressing block of the first clamp in FIG. 2;

FIG. 5 is a schematic structural view of a ramp block of the first clamp of FIG. 2;

fig. 6 is a schematic structural view of a hydraulic jaw of the first clamp of fig. 2.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.

As shown in fig. 1 to 6, the grinding jig for the crankshaft of the motorcycle engine comprises a first jig M1 and a second jig M2.

This first anchor clamps M1 contains a circular shape first flange 1, the edge of this first flange 1 is equipped with a plurality of first connecting pin holes 2, the terminal surface one side of this first flange 1 is equipped with the hydraulic jack catch 4 of mobilizable "L" style of calligraphy, the opposite side of the terminal surface of this first flange 1 is equipped with the first anchor clamps base 3 of a detachable semi-cylindrical, the inboard of this first anchor clamps base 3 is equipped with the inclined plane slider 6 of an slope, be equipped with the first arc apron 8 of going up of a detachable curved on this first anchor clamps base 3, be equipped with the first V type piece 10 of a detachable on the inner wall of this first arc apron 8, this first V type piece 10 is through a pair of first adjusting bolt 9 and this first arc apron 8 fixed connection.

It should be noted that the hydraulic jaws 4 can move radially along the guide grooves 111 of the first connecting disc 1.

The second clamp M2 includes a circular second connecting plate 12, a plurality of second connecting pin holes 13 are provided on the edge of the second connecting plate 12, the end face of the second connecting disc 12 is provided with a detachable semi-cylindrical second lower clamp base 14, the second lower clamp base 14 is provided with a detachable arc-shaped second upper arc-shaped cover plate 15, a detachable second V-shaped block 171 is arranged on the inner wall of the second upper arc-shaped cover plate 15, the second V-shaped block 171 is fixedly connected with the second upper arc-shaped cover plate 15 through a pair of second adjusting bolts 17, the inner side of the second upper arc-shaped cover plate 15 is provided with a connecting sleeve 18, the side wall of the connecting sleeve 18 is provided with a threaded hole 20, the end of the connecting sleeve 18 is provided with an indexing gear 19, the second lower clamp base 14 is provided with a detachable angular displacement sensor 23, the displacement sensor 23 is fixedly connected to the second lower clamp base 14 by a pair of sensor screws 21.

The first connecting disc 1 and the second connecting disc 12 are connected with a headstock and a tailstock of the grinding machine through a first connecting pin hole 2 and a second connecting pin hole 13, respectively.

In addition, the second V block 171 has the same structure as the first V block 10.

In addition, the indexing gear 19 meshes with a driving gear mounted on a driving shaft connected to an output shaft of a stepping motor through a coupling.

In addition, the first lower jig base 3 is fixedly connected to the first connecting plate 1 by a plurality of first lower jig screws 5, so that the first lower jig base 3 and the rotation center of the grinding machine are ensured to be on the same axis. The second lower clamp base 14 is fixedly connected with the second connecting disc 12 through a plurality of second lower clamp screws 22, so that the rotation centers of the second lower clamp base 14 and the grinding machine are ensured to be on the same axis,

a pair of first upper arc-shaped screws 7 are respectively arranged at two ends of the first upper arc-shaped cover plate 8, and a pair of second upper arc-shaped screws 16 are respectively arranged at two ends of the second upper arc-shaped cover plate 15.

The working process of the grinding clamp for the crankshaft of the motorcycle engine is described below.

As shown in fig. 1, the crankshaft 11 is located between the first clamp M1 and the second clamp M2, and the first clamp M1 uses the left end main journal of the crankshaft 11 as a positioning surface, and the axial positioning surface is a thrust surface on the left end main journal of the crankshaft 11. The second clamp M2 uses the right main journal of the crankshaft as a positioning surface, and its axial positioning surface is a thrust surface on the right main journal of the crankshaft 11.

The first V-block 10 and the second V-block 171 clamp the cylindrical surface of the crankshaft 11. The taper of the inclined plane slide block 6 is consistent with that of the crankshaft conical surface of the crankshaft 11, forms line contact with the crankshaft conical surface and provides certain support. The hydraulic clamping jaw 4 can move along the radial direction of the guide groove 111, force is provided by the hydraulic rotary oil cylinder, and the force is converted into radial clamping force of the clamping jaw through the inner wedge block, so that clamping and loosening actions of the clamping jaw on a workpiece are realized.

The angular position displacement sensor 23 monitors the indexing gear 19 during rotation of the crankshaft 11, thereby monitoring the rotation angle of the crankshaft 11.

The grinding clamp for the motorcycle engine crankshaft has the beneficial effects that:

1. all connecting rod necks and main journals of the crankshaft can be ground under one-time clamping;

2. the production efficiency can be greatly improved, the machining precision is effectively guaranteed, and professional skill type operators are not needed.

Without being limited thereto, any changes or substitutions that are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.