CN217647983U - Clamp for machining engine left body - Google Patents

Abstract

The utility model discloses a clamp for processing the left body of an engine, which comprises a flat plate and a clamp component; the clamp assembly comprises a supporting block, two positioning pins, a lever cylinder, a telescopic cylinder and a pressure rod; the supporting block is used for horizontally supporting a left combining surface of the left body of the engine; the two positioning pins are used for being respectively inserted into two left side holes of the left body of the engine; the lever cylinder is used for pressing the cavity wall of the left body of the engine; the compression rod can penetrate out of the gear shifting arm hole of the left body of the engine upwards, and the compression part of the telescopic cylinder can compress the outer end face of the gear shifting arm hole of the left body of the engine when the compression rod can be driven to move downwards. After the clamp is arranged on a numerical control machine tool or a machining center, the clamp can be used for positioning and clamping when an engine left body is used for machining a crankshaft hole, a main shaft hole, an auxiliary shaft hole, a variable speed drum hole, a right joint surface and a right side hole, can reduce the clamping man-hour, improves the machining efficiency, can avoid the problem of deviation caused by repeated positioning or secondary clamping, and reduces the machining cost.

Description

Clamp for machining engine left body

Technical Field

The utility model relates to an anchor clamps of engine left side body processing.

Background

Reference is made to fig. 1-2, which is a left engine body (or engine left box). The characteristics of the existing processing clamp and the process are analyzed as follows:

firstly, when a crankshaft hole (N-11), a main shaft hole (N-12), an auxiliary shaft hole (N-13) and a speed change drum hole (N-14) of the left engine body (N) are machined, the requirements on the positions of mutual parallelism are met, a first set of clamp is required to clamp and simultaneously machine, and a right joint surface (N-15) for pressing the left engine body (N) is adopted, so that the right joint surface (N-15) and the right hole (N-16) cannot be machined;

secondly, when a right joint surface (N-15) and a right hole (N-16) of the left body (N) of the engine are machined, a second set of clamps are required to be clamped and then simultaneously machined, and two positioning pins are inserted into any two holes of a positioning crankshaft hole (N-11), a main shaft hole (N-12), an auxiliary shaft hole (N-13) and a speed changing drum hole (N-14) to be positioned and then tightened, so that two holes into which the two positioning pins are inserted cannot be machined.

Due to the defects of the two sets of clamps, the mutual technical requirements that a crankshaft hole (N-11), a main shaft hole (N-12), an auxiliary shaft hole (N-13), a variable speed drum hole (N-14), a right joint surface (N-15) and a right hole (N-16) can be processed simultaneously after clamping cannot be met, and secondary clamping is needed. Therefore, the problems of low working efficiency and deviation caused by repeated positioning or secondary clamping exist.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned defect or defect problems that exist among the prior art, the utility model provides an anchor clamps of engine left side body processing.

In order to achieve the purpose, the utility model provides a clamp for processing the left body of an engine, which comprises a flat plate and a clamp component; the clamp assembly comprises a supporting block, two positioning pins, a lever cylinder, a telescopic cylinder and a pressure rod; the supporting block is fixed on the flat plate and used for horizontally supporting a left combining surface of the left body of the engine; the two positioning pins are fixed on the flat plate and are respectively inserted into two left holes of the left body of the engine; the lever cylinder is arranged on the flat plate and is used for pressing the cavity wall of the left body of the engine; the output end of the telescopic cylinder is connected with the lower end of a pressure lever, the pressure lever can upwards penetrate through a shift arm hole of the left body of the engine, and the upper end of the pressure lever is provided with a pressing part; when the telescopic cylinder drives the compression rod to move downwards, the compression part can compress the outer end face of the shift arm hole of the left body of the engine.

By adopting the scheme, when the engine is clamped, the bearing block horizontally supports the left joint surface of the left body of the engine; the two positioning pins are respectively inserted into two left side holes of the left body of the engine for positioning, then the lever cylinder is started to work and press the cavity wall of the left body of the engine, and meanwhile, the telescopic cylinder can be started and drive the compression rod to move downwards to press the outer end face of the shift arm hole of the left body of the engine. This engine left body is by accurate location and clamping this moment. And because the lever cylinder and the pressure lever do not press the right joint surface tightly, the processing of the right joint surface and the right side hole can not be influenced, and the two positioning pins are positioned by being matched with the two left side holes of the left body of the engine, but not positioned by being matched with the crankshaft hole, the main shaft hole, the auxiliary shaft hole and the speed change drum hole. Therefore, after the clamp is arranged on a numerical control machine tool or a machining center, a crankshaft hole, a main shaft hole, an auxiliary shaft hole, a variable speed drum hole, a right joint surface and a right side hole can be respectively machined, so that the clamping working time can be reduced, the machining efficiency can be improved, the deviation problem caused by repeated positioning or secondary clamping can be avoided, and the machining cost can be reduced.

Further, the supporting blocks are four and are distributed at intervals along the circumferential direction of the left combining surface of the left body of the engine. Because the left combining surface of the left body of the engine is supported by a plurality of positions, the horizontal positioning precision is improved, and the engine is more stable in compression.

Further, the clamp assembly further comprises three outer limit pins; the three outer limiting pins are fixed on the flat plate and distributed in a triangular manner; the three outer limiting pins are respectively used for limiting three arc parts on the outer side wall of the left body of the engine. The three outer limiting pins can realize the limiting and positioning of three arc-shaped parts on the outer side wall of the left body of the engine in different directions, and can avoid vibration in the machining process.

Furthermore, the outer limiting pin comprises a pin rod and a swinging block, and one end of the swinging block is fixed on the flat plate through a bolt; the lower end of the pin rod is fixedly connected with the other end of the swinging block. Firstly, during clamping, after the swing block rotates, the outer limiting pin is contacted with three arc-shaped parts on the outer side wall of the left body of the engine, and then the bolt is rotated to compress the outer limiting pin, so that the contact limiting is ensured; secondly, after the processing is finished, after the bolt can be loosened, the outer limiting pin can be far away from three arc parts of the outer side wall of the left body of the engine through the rotation of the swinging block, so that a space is reserved, and the left body of the engine can be conveniently detached.

Further, be fixed with the uide bushing on the dull and stereotyped, the guiding hole in this uide bushing sets up for the slope, and this depression bar lower extreme wears out behind the guiding hole and this telescoping cylinder output is articulated, and this appearance of compressing tightly portion is less than the guiding hole just satisfies: when the telescopic cylinder can drive the pressure rod to move downwards and press the outer end surface of the shift arm hole of the left body of the engine tightly; therefore, the clamping can ensure the realization of the pressing function during clamping,

when the telescopic cylinder drives the compression rod to move upwards to a proper position, the center of the compression part is concentric with a gear shifting arm hole of the left body of the engine; the pressing part is smaller than the inner hole of the guide hole in shape, so that the left engine body is loosened and can be directly pulled upwards, and the pressing part can penetrate through the shifting arm hole downwards to detach the left engine body easily.

Further, the clamp assembly is provided with a plurality of clamps which are arranged on the flat plate side by side. The multi-workpiece clamping device can clamp a plurality of workpieces at one time, can process a plurality of workpieces at the same time, can realize batch production, and improves the production efficiency by times.

Furthermore, two vertical plates are respectively fixed at two ends of the flat plate; the two vertical plates are arranged on a rotary positioner.

The utility model discloses beneficial effect: after the clamp is arranged on a numerical control machine tool or a machining center, the crankshaft hole, the main shaft hole, the auxiliary shaft hole, the variable speed drum hole, the right joint surface and the right side hole of the engine can be respectively machined only by clamping the left body of the engine once, so that the clamping working time can be reduced, and the machining efficiency can be improved; meanwhile, the problem of deviation caused by repeated positioning or secondary clamping can be avoided, the relative position precision between the two parts is improved, and the processing cost is reduced.

Drawings

Fig. 1-2 are perspective views of the left body of the engine.

Fig. 3 is a front view of a fixture for machining a left engine body according to an embodiment of the present invention.

Fig. 4 is a top view of a fixture for machining an engine left body in an embodiment of the present invention.

Fig. 5-7 are perspective views of a fixture for machining a left body of an engine according to an embodiment of the present invention.

Fig. 8 is an assembly view of the telescoping cylinder, compression bar, and guide sleeve.

Fig. 9 is a schematic structural view of the guide sleeve.

Fig. 10 is a front view of an engine left body machining fixture when positioning and pressing a right engine cover.

Fig. 11 is a top view of the first embodiment of the present invention when the engine right cover is positioned and pressed by the fixture for processing the engine left body.

Fig. 12 is a perspective view of an engine left body processing clamp when an engine right cover is positioned and compressed in the first embodiment of the present invention.

Fig. 13 is a perspective view of a clamp for processing a left engine body according to an embodiment of the present invention, when a pressing rod is released upwards after a right engine cover is processed.

Fig. 14 is a perspective view of a clamp for processing the left body of an engine in the second embodiment of the present invention when the right cover of the engine is positioned and compressed.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

the first embodiment is as follows: referring to fig. 3-9, a fixture for machining the left body of an engine comprises a flat plate 1 and a fixture assembly 2; the clamp assembly 2 comprises a supporting block 2-1, two positioning pins 2-2, a lever cylinder 2-3, a telescopic cylinder 2-4, a pressure rod 2-5 and three outer limiting pins 2-6.

The supporting block 2-1 is fixed on the flat plate 1 and is used for horizontally supporting a left combining surface N-1 of the left body N of the engine.

In the embodiment, the support blocks 2-1 are four and are distributed at intervals along the circumferential direction of the left joint surface N-1 of the left engine body N. Because the left joint surface N-1 of the left body N of the engine is supported by a plurality of positions, the horizontal positioning precision is improved, and the engine is more stable in compression.

The two positioning pins 2-2 are fixed on the flat plate 1-1 and are used for being respectively inserted into two left side holes N-2 of the left body N of the engine.

The lever cylinder 2-3 is mounted on the plate 1-1 and is used to press the cavity wall N-4 of the left body N of the engine.

In particular, the lever cylinder 2-3 may adopt an existing structure. Such as model HLC-MF25, available from suzhou keyan electromechanics, inc.

The output end of the telescopic cylinder 2-4 is connected with the lower end of a pressure lever 2-5, the pressure lever 2-5 can penetrate out of a shift arm hole N-3 of the left body N of the engine upwards, the upper end of the pressure lever 2-5 is provided with a pressing part 2-51, and the telescopic cylinder 2-4 can drive the pressure lever 2-5 to move downwards and enable the pressing part 2-51 to press the outer end face of the shift arm hole N-3 of the left body N of the engine.

In particular, the telescopic cylinders 2-4 may be of an existing construction (e.g. telescopic hydraulic cylinders).

Referring to fig. 6, in addition, guide sleeves 2 to 7 are fixed to the flat plate 1. Referring to fig. 9, the guiding holes 2-71 in the guiding sleeves 2-7 are arranged obliquely (for example, the guiding holes 2-71 are 87 degrees from the horizontal direction), the lower end of the pressing rod 2-5 penetrates through the guiding holes 2-71 and then is hinged with the output end of the telescopic cylinder 2-4 through the rotating shaft 2-41 (see fig. 8), and the shape of the pressing part 2-51 is smaller than that of the guiding holes 2-71 and satisfies the following conditions: when the telescopic cylinder 2-4 can drive the compression rod 2-5 to move downwards and press the outer end surface of the shift arm hole N-3 of the left body N of the engine (see figure 10); therefore, the pressing function can be ensured to be realized during clamping.

Referring to fig. 13, when the telescopic cylinder 2-4 drives the compression rod 2-5 to displace upwards to a position, the center of the compression part 2-51 is concentric with a shift arm hole N-3 of the left engine body N; the engine left body N is loosened when the shape of the pressing part 2-51 is smaller than the guide hole 2-71, and simultaneously the engine left body N can be directly pulled upwards, and the pressing part 2-51 can be downwards penetrated out of the shifting arm hole N-3 to easily remove the pulling engine left body N.

Wherein, the three outer limit pins 2-6 are fixed on the flat plate 1 and distributed in a triangular shape; the three outer limiting pins 2-6 are respectively used for limiting three arc parts N-5 on the outer side wall of the left body N of the engine. The three outer limiting pins 2-6 can limit and position three arc parts N-5 on the outer side wall of the left body N of the engine in different directions, and can avoid vibration during machining.

The outer limiting pin 2-6 comprises a pin rod 2-61 and a swinging block 2-62, and one end of the swinging block 2-62 is fixed on the flat plate 1 through a bolt 2-63; the lower end of the pin rod 2-61 is fixedly connected with the other end of the swinging block 2-62. Firstly, during clamping, after the swing block 2-62 rotates, the outer limiting pin 2-6 is in contact with three arc-shaped parts N-5 on the outer side wall of the left body N of the engine, and then the bolt 2-63 is rotated to be pressed tightly, so that contact limiting is guaranteed; secondly, after the machining is finished and the bolts 2 to 63 can be loosened, the outer limiting pin 2 to 6 can be far away from three arc-shaped parts N to 5 on the outer side wall of the left body N of the engine through the rotation of the swinging block 2 to 62, and the left body N of the engine can be conveniently dismounted.

In this embodiment, the two clamp assemblies 2 are arranged side by side on the plate 1. The clamping device can clamp a plurality of workpieces at one time, can process a plurality of workpieces simultaneously, can realize batch production, and improves the production efficiency by times.

Referring to fig. 10-12, when the clamp is clamped, the bearing block 2-1 horizontally supports a left joint surface N-1 of a left body N of an engine; the two positioning pins 2-2 are respectively inserted into two left side holes N-2 of the left body N of the engine for positioning, then the cavity wall N-4 of the left body N of the engine is pressed by starting the lever cylinder 2-3, and the outer end face of the shift arm hole N-3 of the left body N of the engine is pressed by starting the telescopic cylinder 2-4 and driving the compression rod 2-5 to move downwards, and at the moment, the left body N of the engine is accurately positioned and clamped.

The right joint surface N-15 and the right joint surface N-15 are not tightly pressed by the lever cylinder 2-3 and the pressure lever 2-5, so that the processing of the right joint surface N-15 and the right hole N-15 cannot be influenced, the two positioning pins 2-2 are positioned by matching with the two left holes N-2 of the left body N of the engine, and are not positioned by matching with the crankshaft hole N-11, the main shaft hole N-12, the auxiliary shaft hole N-13 and the speed change drum hole N-14, so that after the clamp is installed on a numerical control machine or a processing center, a processing program is set, and after the machine is started to work, the crankshaft hole N-11, the auxiliary shaft hole N-12, the main shaft hole N-13, the speed change drum hole N-14, the right joint surface N-15 and the right hole N-15 can be respectively processed, the clamping man-hour can be reduced, the processing efficiency can be improved, the deviation problem caused by repeated positioning or secondary clamping can be avoided, and the processing cost can be reduced.

Example two: this embodiment is substantially the same as the first embodiment, except that:

referring to fig. 14, two vertical plates 3 are respectively fixed at two ends of the flat plate 1; the two vertical plates 3 are arranged on a rotary positioner 4.

This gyration machine of shifting 4 is used for driving anchor clamps and rotates and change the direction of work piece on the anchor clamps, and then changeable processing work piece different surface and hole site, reducible clamping number of times, and the process is more concentrated simultaneously, also avoids a lot of clamping and the positioning error who causes, can improve product quality.

Specifically, the rotary positioner 4 may adopt an existing structure. Such as model CNC-250R from Asahi Yangji (Jiashan) Limited.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the principles of this invention without the use of inventive faculty. Therefore, the technical solutions that can be obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention by those skilled in the art should be within the scope of protection defined by the claims.

Claims (7)

1. The utility model provides a anchor clamps of engine left body processing, includes dull and stereotyped (1) and anchor clamps subassembly (2), its characterized in that:

the clamp assembly (2) comprises a supporting block (2-1), two positioning pins (2-2), a lever cylinder (2-3), a telescopic cylinder (2-4) and a pressure rod (2-5);

the supporting block (2-1) is fixed on the flat plate (1) and is used for horizontally supporting a left combining surface (N-1) of the left body (N) of the engine;

the two positioning pins (2-2) are fixed on the flat plate (1-1) and are respectively inserted into two left side holes (N-2) of the left body (N) of the engine;

the lever cylinder (2-3) is arranged on the flat plate (1-1) and is used for pressing a cavity wall (N-4) of the left body (N) of the engine;

the output end of the telescopic cylinder (2-4) is connected with the lower end of a compression bar (2-5), the compression bar (2-5) can upwards penetrate through a gear shifting arm hole (N-3) of the left body (N) of the engine, and the upper end of the compression bar (2-5) is provided with a pressing part (2-51); when the telescopic cylinder (2-4) drives the compression rod (2-5) to move downwards, the pressing part (2-51) can press the outer end face of the shift arm hole (N-3) of the left body (N) of the engine.

2. The jig for machining the left body of the engine as claimed in claim 1, wherein: the supporting blocks (2-1) are four and distributed at intervals along the circumferential direction of a left combining surface (N-1) of the left engine body (N).

3. The jig for machining the engine left body as claimed in claim 1, wherein: the clamp assembly (2) further comprises three outer limit pins (2-6); the three outer limiting pins (2-6) are fixed on the flat plate (1) and distributed in a triangular shape; the three outer limiting pins (2-6) are respectively used for limiting three arc parts (N-5) on the outer side wall of the left body (N) of the engine.

4. The jig for machining the left body of the engine as set forth in claim 3, wherein: the outer limiting pin (2-6) comprises a pin rod (2-61) and a swinging block (2-62), and one end of the swinging block (2-62) is fixed on the flat plate (1) through a bolt (2-63); the lower end of the pin rod (2-61) is fixedly connected with the other end of the swinging block (2-62).

5. The jig for machining the engine left body as claimed in claim 1, wherein: a guide sleeve (2-7) is fixed on the flat plate (1); the guide hole (2-71) in the guide sleeve (2-7) is obliquely arranged, the lower end of the pressure rod (2-5) penetrates through the guide hole (2-71) and then is hinged with the output end of the telescopic cylinder (2-4), and the shape of the compression part (2-51) is smaller than that of the guide hole (2-71) and meets the following requirements:

when the telescopic cylinder (2-4) can drive the compression rod (2-5) to move downwards to a position, the compression part (2-51) can compress the outer end surface of the shift arm hole (N-3) of the left body (N) of the engine;

when the telescopic cylinder (2-4) drives the compression rod (2-5) to move upwards to a position, the center of the compression part (2-51) is concentric with a shift arm hole (N-3) of the left engine body (N).

6. The jig for machining the left body of the engine as claimed in claim 1, wherein: the clamp assembly (2) is provided with a plurality of clamps which are arranged on the flat plate (1) side by side.

7. The jig for machining the left body of the engine as claimed in claim 1, wherein: two vertical plates (3) are respectively fixed at two ends of the flat plate (1); the two vertical plates (3) are arranged on a rotary positioner (4).

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