CN210189149U

CN210189149U - Special clamp for drilling hole on combination surface of left crankcase cover and cylinder body

Info

Publication number: CN210189149U
Application number: CN201921053973.6U
Authority: CN
Inventors: Xiaochuan He; 贺小川
Original assignee: Chongqing Yujiang Lanfeng Power Components Co Ltd
Current assignee: Chongqing Yujiang Lanfeng Power Components Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-03-27
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a special fixture for drilling a cover closing surface and a cylinder body combining surface of a left crankcase body, which comprises a base plate fixedly arranged on a drilling and tapping center workbench, three sets of locking mechanisms and a positioning assembly, wherein the three sets of locking mechanisms are arranged at the upper left corner, the upper right corner and the lower left corner of the base plate respectively; the locking mechanism comprises a hydraulic cylinder, a sleeve, a pressing block and a supporting block, and the hydraulic cylinder is vertically and fixedly installed on the substrate. The utility model discloses to current new product processing technology not enough, developed a new anchor clamps that are exclusively used in left bent axle box and close capping and cylinder body faying face drilling. The cover surface and the cylinder body of the left crank shaft box body are supported through the base plate, and the cover surface and the cylinder body of the left crank shaft box body are clamped and positioned by the aid of three sets of locking mechanisms and positioning assemblies arranged on the base plate, so that the requirements of production and machining are met.

Description

Special clamp for drilling hole on combination surface of left crankcase cover and cylinder body

Technical Field

The utility model belongs to the technical field of motorcycle engine box processing, concretely relates to left crankshaft box closes capping surface and cylinder body faying face boring special fixture.

Background

The fixture is a combined mechanism used for fixing and positioning a workpiece in the machining process. The clamp structure adopted by workpieces with different structures or shapes is mostly different. With the increase of export trade in China, the motorcycle is taken as a main industrial product of export trade, and the share of export trade in China is increased year by year. With the development of the industry, the engine structure of motorcycles is also constantly changing. Therefore, in the production and processing process, the required clamp structure is continuously adjusted, and the adopted processing equipment is continuously replaced and optimized, so that the existing clamp cannot meet the production requirements, for example, the CG125 type motorcycle engine crankcase cover produced and processed by our factory belongs to an upgraded product. Therefore, a special clamp is required to be developed aiming at the new motorcycle engine product structure so as to meet the production and processing requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a left side bent axle box closes capping and cylinder body faying face boring special fixture is provided to satisfy left bent axle box and close the drilling clamping location requirement of capping and cylinder body faying face.

The technical scheme of the utility model as follows: the special drilling clamp for the cover closing surface and the cylinder body combining surface of the left crank shaft box body comprises a base plate fixedly mounted on a drilling and tapping center workbench, three sets of locking mechanisms and a positioning assembly, wherein the three sets of locking mechanisms are arranged on the left upper corner, the right upper corner and the left lower corner of the base plate respectively, and the positioning assembly is mounted on the right lower corner of the base plate; the locking mechanism comprises a hydraulic cylinder, a sleeve, a pressing block and a supporting block, and the hydraulic cylinder is vertically and fixedly arranged on the substrate; the sleeve is sleeved on a piston rod of the hydraulic cylinder and is in sliding fit with the piston rod of the hydraulic cylinder; the pressing block is positioned above the sleeve and is also sleeved on a piston rod of the hydraulic cylinder; the far end of the piston rod of the hydraulic cylinder is in threaded connection with a locking screw which limits the pressing block on the piston rod of the hydraulic cylinder; the supporting block is positioned below the pressing block and is fixed on the substrate through a bolt; the positioning assembly comprises a supporting table and a positioning column which is vertically arranged and provided with a conical head, the conical head of the positioning column is small at the top and big at the bottom, and the conical head guides the positioning column; the supporting platform is fixedly arranged on the substrate through bolts, and the positioning columns are in threaded connection with the supporting platform.

Further: the base plate is also provided with a circle of groove along the edge.

Further: the support block is fixedly connected in the waist-shaped hole through a bolt.

The beneficial effect of this scheme: the utility model discloses to current new product processing technology not enough, developed a new anchor clamps that are exclusively used in left bent axle box and close capping and cylinder body faying face drilling. The cover surface and the cylinder body of the left crank shaft box body are supported through the base plate, and the cover surface and the cylinder body of the left crank shaft box body are clamped and positioned by the aid of three sets of locking mechanisms and positioning assemblies arranged on the base plate, so that the requirements of production and machining are met. For the locking mechanism in the scheme, the hydraulic cylinder is used as power, and the use habit in the existing factory is also met. Meanwhile, the locking mechanism in the scheme is simple in structure and very convenient to use and maintain. For processing manufacturers in the same industry, the scheme is worth reference and popularization, and has great market prospect.

Drawings

FIG. 1 is a schematic structural view of the left crankcase of the present invention after the cover surface and the cylinder body are positioned and clamped;

FIG. 2 is a schematic view of the overall structure of the special fixture in the present invention;

FIG. 3 is a schematic view of the locking mechanism of FIG. 2 installed;

FIG. 4 is a schematic view of the positioning assembly of FIG. 2;

fig. 5 is a schematic view of a forming hole structure on the cylinder body of the present invention.

Detailed Description

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

as shown in fig. 1, 2, 3, 4 and 5, the present invention discloses a special fixture for drilling the joint surface of the cover and the cylinder body of the left crankcase, which is specially used for drilling and tapping a center clamping system of japanese brother S700Z 1. The special drilling fixture in the scheme comprises a base plate 3, three sets of locking mechanisms 2 and at least one set of positioning assembly 4, wherein the scheme is described by one set of positioning assembly 4 in the embodiment. Base plate 3 fixed mounting is on boring the workstation of attacking the center, and three sets of locking mechanical system 2 set up respectively in the upper left corner of base plate 3, upper right corner and lower left corner, and locating component 4 installs in the lower right corner of base plate 3. The locking mechanism 2 comprises a hydraulic cylinder 24, a sleeve 23, a pressing block 22 and a supporting block 25, the hydraulic cylinder 24 is vertically and fixedly arranged on the substrate 3, the sleeve 23 is sleeved on a piston rod of the hydraulic cylinder 24, and the sleeve 23 is in sliding fit with the piston rod of the hydraulic cylinder 24; the pressing block 22 is positioned above the sleeve 23, and the pressing block 22 is also sleeved on a piston rod of the hydraulic cylinder 24; a locking screw 21 is screwed to the distal end of the piston rod of the hydraulic cylinder 24, and the pressing piece 22 is restrained on the piston rod of the hydraulic cylinder 24 by the locking screw 21. As shown in fig. 2, a support block 25 is located below the press block 22, and the support block 25 is fixed to the base plate 3 by bolts.

The positioning assembly 4 in this embodiment comprises a support table 42 and a vertically arranged positioning column 41 with a conical head 401. The tapered head 401 of the positioning post 41 is large in the top and small in the bottom, and the positioning post 41 can be guided by the tapered head 401, so that the positioning post 41 can be smoothly inserted into the molding hole 11 of the cylinder as shown in fig. 5. The support table 42 is fixedly mounted on the substrate 3 by bolts, and the positioning column 41 is screwed to the support table 42. The working principle of the special fixture in the scheme is described in a specific implementation mode as follows: when the locking mechanism is used, the cylinder body is placed on the substrate 3, the cylinder body is positioned by the positioning column 41, and the side face of the supporting block 25 of the debugged locking mechanism 2 is used for limiting the cylinder body. Then, the pressing block 22 is rotated and is far away from the supporting block 25, and the left crankcase cover closing surface 1 is buckled on the upper part of the cylinder body; then, the pressing block 22 is rotated again and the pressing block 22 is rotated to a position right above the supporting block 25, and the left crankcase cover surface 1 is formed between the pressing block 22 and the supporting block 25. Meanwhile, three supporting blocks 25 of the three sets of locking mechanisms 2 support the upper left corner, the upper right corner and the lower left corner of the cover surface 1 of the left crankcase body respectively, and then the piston rod of the hydraulic cylinder 24 retracts. The sleeve 23 and the pressing block 22 are in sliding fit with the piston rod of the hydraulic cylinder 24, so that in the process that the piston rod of the hydraulic cylinder 24 retracts downwards, pressure is applied to the pressing block 22 through the locking screw 21, the cover closing surface 1 of the left crankcase body and the cylinder body are locked on the base plate 3 simultaneously under the cooperation of the pressing block 22 and the supporting block 25, and finally the drilling process is completed.

For the scheme, because the cylinder body is not provided with only one machined forming hole 11, the cylinder body can be limited by adopting a plurality of sets of positioning assemblies 4. This can be selected by the skilled person at his discretion according to the requirements of the processing technique. As shown in fig. 1, the base plate 3 is also provided with a ring of grooves 31 along the edge. The processing liquid and the waste water on the substrate 3 can be collected by the groove 31, and the processing liquid and the waste water can be collected. As shown in fig. 1, a waist-shaped hole 32 is formed on the lower right corner of the substrate 3, and the support block 25 is connected to the waist-shaped hole 32 by a bolt. After the positioning column 41 is machined for a long time, the position of the positioning column 41 needs to be adjusted. Therefore, in the preferred embodiment, the slotted hole 32 is additionally formed in the substrate 3 to facilitate adjusting the fixed connection position between the supporting block 25 and the substrate 3, so as to facilitate adjusting the fixed position of the positioning column 41.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Left bent axle box closes capping and cylinder body faying face drilling special fixture, its characterized in that: the drilling and tapping machine comprises a base plate (3) fixedly installed on a drilling and tapping center workbench, three sets of locking mechanisms (2) arranged on the base plate (3) and a positioning assembly (4), wherein the three sets of locking mechanisms (2) are respectively arranged at the upper left corner, the upper right corner and the lower left corner of the base plate (3), and the positioning assembly (4) is installed at the lower right corner of the base plate (3); the locking mechanism (2) comprises a hydraulic cylinder (24), a sleeve (23), a pressing block (22) and a supporting block (25), and the hydraulic cylinder (24) is vertically and fixedly arranged on the substrate (3); the sleeve (23) is sleeved on a piston rod of the hydraulic cylinder (24), and the sleeve (23) is in sliding fit with the piston rod of the hydraulic cylinder (24); the pressing block (22) is positioned above the sleeve (23), and the pressing block (22) is also sleeved on a piston rod of the hydraulic cylinder (24); the far end of the piston rod of the hydraulic cylinder (24) is in threaded connection with a locking screw (21), and the locking screw (21) limits the pressing block (22) on the piston rod of the hydraulic cylinder (24); the supporting block (25) is positioned below the pressing block (22), and the supporting block (25) is fixed on the substrate (3) through a bolt; the positioning assembly (4) comprises a support table (42) and a positioning column (41) which is vertically arranged and provided with a conical head (401), the conical head (401) of the positioning column (41) is small in upper part and large in lower part, and the conical head (401) guides the positioning column (41); the supporting platform (42) is fixedly arranged on the substrate (3) through bolts, and the positioning column (41) is in threaded connection with the supporting platform (42).

2. The special clamp for drilling the joint surface of the left crankcase cover and the cylinder body according to claim 1, wherein: the base plate (3) is also provided with a circle of groove (31) along the edge.

3. The special clamp for drilling the joint surface of the left crankcase cover and the cylinder block as claimed in claim 1 or 2, wherein: the lower right corner plate surface of the base plate (3) is provided with a waist-shaped hole (32), and the supporting block (25) is fixedly connected in the waist-shaped hole (32) through a bolt.