CN214212979U - Special vehicle crank arm positioning hole drilling clamp - Google Patents

Abstract

The utility model provides a special vehicle cranks arm locating hole boring grab, include clamping mechanism, lower clamping mechanism, go up supporting mechanism, under bracing mechanism, left supporting mechanism, right supporting mechanism, the anchor clamps body, coupling mechanism, positioning mechanism and base. The positioning hole drilling clamp clamps the crank arm through the upper and lower clamping mechanisms, ensures drilling positions through the upper and lower positioning mechanisms, is fixed on the clamp body, can rotate due to the fact that the clamp body is connected with the base through the connecting shaft, realizes three position positioning through pin shaft connection of three positions, one is used for installing the crank arm, and the other two are used for machining a center hole. The utility model discloses a crank arm locating hole boring grab can reduce process time, improves the precision of drilling, improves machining efficiency, alleviates operator's intensity of labour simultaneously greatly.

Description

Special vehicle crank arm positioning hole drilling clamp

Technical Field

The utility model belongs to the technical field of special vehicle action system spare part makes, concretely relates to special vehicle cranks arm locating hole boring grab.

Background

The crank arm is a key part of a special vehicle action system, four positioning holes need to be drilled, and the precision of the positioning holes directly influences the machining precision of other parts of the crank arm. The traditional drilling method is to mark the position of a hole by marking, then clamp the hole on a drilling machine by a common vice and drill according to the marked position. The method has low drilling precision, so that the subsequent processing precision is lower. Because the four positioning holes are positioned at different positions, the processing of each hole needs to be repositioned and clamped, four times of positioning and clamping are needed totally, the scribing time is long, and the processing efficiency of the crank arm is very low.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a special vehicle cranks arm locating hole boring grab to solve the technical problem who how to improve the precision and the efficiency of cranking arm locating hole manufacturing.

(II) technical scheme

In order to solve the technical problem, the utility model provides a special vehicle crank arm positioning hole drilling clamp which comprises an upper clamping mechanism, a lower clamping mechanism, an upper supporting mechanism, a lower supporting mechanism, a left supporting mechanism, a right supporting mechanism, a clamp body, a connecting mechanism, a positioning mechanism and a base; wherein the content of the first and second substances,

the upper clamping mechanism and the lower clamping mechanism are respectively used for clamping two ends of the crank arm and fixing the crank arm; the upper clamping mechanism comprises an upper base, an upper positioning plate, a long lead screw, a long positioning shaft and a V-shaped block. Wherein, the upper base is fixed on the fixture body through a screw; the two V-shaped blocks are arranged in the groove of the upper base; the upper positioning plate is connected with the upper base through a screw and used for limiting the V-shaped block to move in the groove of the upper base; the two ends of the long screw rod are respectively provided with left-handed threads and right-handed threads which are respectively matched with the threads in the two V-shaped blocks; the long positioning shaft is fixed on the upper base through a bolt, and a groove of the long positioning shaft is matched with a step part in the middle of the long lead screw and used for limiting the moving direction of the long lead screw; the lower clamping mechanism and the upper clamping mechanism have the same structure;

the left support mechanism, the right support mechanism, the upper support mechanism and the lower support mechanism play a role in guiding the drilling of the crank arm positioning hole;

the left supporting mechanism comprises a left bracket, a left drill plate, a first screw, a first pin, a first drill bushing and a first bushing; wherein, the left bracket is fixed on the fixture body through a screw; the left drill plate is hinged with the left support through a first pin, and the left drill plate can rotate around the first pin; the outer circle of the first bushing is tightly connected with the left drill plate, the first drill bushing is installed in the first bushing, and the first drill bushing is limited by a screw fixed on the left drill plate; the first screw is screwed on the left bracket through threads to fix the left drill plate; the right supporting mechanism and the left supporting mechanism have the same structure;

the upper supporting mechanism comprises an upper end bracket, a second bushing, a second drill bushing and a second screw; wherein, the upper end bracket is fixed on the fixture body through a screw; the second bushing is tightly connected with the upper end bracket, and the second drill bushing is arranged in the second bushing; the second screw is screwed on the upper end bracket through threads and presses the second drill bush to prevent the second drill bush from falling off; the lower supporting mechanism and the upper supporting mechanism have the same structure;

the connecting mechanism comprises a mandrel, a bearing sleeve, a deep groove ball bearing, a thrust ball bearing and a round nut; wherein, one end of the mandrel is fixed with the fixture body through threads; the deep groove ball bearings, the bearing sleeves and the thrust ball bearings are connected with the mandrel, and the two deep groove ball bearings are connected with the base and rotate around the mandrel; the bearing sleeve is used for protecting the thrust ball bearing; the round nut is fixedly connected with the other end of the mandrel through threads, and the deep groove ball bearing, the bearing sleeve and the thrust ball bearing are axially limited; the axial clearance between the mandrel step and the round nut is controlled to ensure that the clamp body and the base can move relatively;

the positioning mechanism comprises a positioning bolt and a positioning drill bushing; one positioning drill bushing is fixedly connected with the clamp body, the other positioning drill bushing is fixedly connected with the base, the positioning bolt is inserted into inner holes of the two positioning drill bushings, and the relative positions of the clamp body and the base are fixed;

the bottom surface of the clamp body is attached to the base, and the center hole of the clamp body is connected with the connecting mechanism through threads.

(III) advantageous effects

The utility model provides a special vehicle cranks arm locating hole boring grab, include clamping mechanism, lower clamping mechanism, go up supporting mechanism, under bracing mechanism, left supporting mechanism, right supporting mechanism, the anchor clamps body, coupling mechanism, positioning mechanism and base. The positioning hole drilling clamp clamps the crank arm through the upper and lower clamping mechanisms, ensures drilling positions through the upper and lower positioning mechanisms, is fixed on the clamp body, can rotate due to the fact that the clamp body is connected with the base through the connecting shaft, realizes three position positioning through pin shaft connection of three positions, one is used for installing the crank arm, and the other two are used for machining a center hole.

The crank arm positioning hole drilling clamp improves the method for drilling the crank arm positioning hole, and the steps of marking and drilling are improved into direct drilling, so that the marking process is eliminated, and the processing time is reduced; the four-time clamping positioning is changed into one-time clamping positioning, the drill hole without the drill bushing is changed into the drill hole with the drill bushing, and the drill hole with the drill bushing for guiding is matched in one-time clamping, so that the precision of the drill hole is greatly improved, the machining efficiency is improved, and the labor intensity of an operator is greatly reduced.

Drawings

Fig. 1 is a schematic structural view of a crank arm positioning hole drilling jig according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an upper clamping mechanism in an embodiment of the present invention;

FIG. 3 is a schematic structural view of a left support mechanism in an embodiment of the present invention;

fig. 4 is a schematic structural view of an upper supporting mechanism in the embodiment of the present invention;

fig. 5 is a schematic structural view of a connecting mechanism in an embodiment of the present invention;

FIG. 6 is a schematic structural view of a positioning mechanism in an embodiment of the present invention;

fig. 7 is a schematic view of a back structure of the crank arm positioning hole drilling jig according to the embodiment of the present invention;

fig. 8 is the utility model discloses crank arm positioning hole boring grab crank arm processing schematic diagram.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following description will make a detailed description of embodiments of the present invention with reference to the accompanying drawings and examples.

The embodiment provides a special vehicle crank arm positioning hole drilling clamp, the structure of which is shown in fig. 1, and the special vehicle crank arm positioning hole drilling clamp comprises an upper clamping mechanism 2, a lower clamping mechanism 5, an upper supporting mechanism 1, a lower supporting mechanism 6, a left supporting mechanism 7, a right supporting mechanism 4, a clamp body 8, a connecting mechanism, a positioning mechanism 3 and a base 31.

The upper clamping mechanism 2 and the lower clamping mechanism 5 are respectively used for clamping two ends of the crank arm and fixing the crank arm. As shown in fig. 2, the upper clamping mechanism 2 includes an upper base 9, an upper positioning plate 12, a long lead screw 10, a long positioning shaft 13, and a V-block 11. Wherein, the upper base 9 is fixed on the clamp body 8 through screws to play a main supporting role. Two V-blocks 11 are mounted in the grooves of the upper base 9. The upper positioning plate 12 is connected to the upper base 9 by screws for limiting the movement of the V-block 11 in the groove of the upper base 9. The two ends of the long screw rod 10 are respectively provided with a left-handed T-shaped thread and a right-handed T-shaped thread which are respectively matched with the left-handed T-shaped thread and the right-handed T-shaped thread in the two V-shaped blocks 11. The long lead screw 10 is rotated to fold and unfold the V-shaped block 11, so as to clamp and unfold the crank arm. The long positioning shaft 13 is fixed on the upper base 9 through a bolt, and a groove of the long positioning shaft 13 is matched with a step part in the middle of the long lead screw 10 and used for limiting the moving direction of the long lead screw 10 so as to ensure that the furling and opening centers of the two V-shaped blocks 11 are always in the same position. The lower clamping mechanism 5 has the same structure as the upper clamping mechanism 2.

The left supporting mechanism 7, the right supporting mechanism 4, the upper supporting mechanism 1 and the lower supporting mechanism 6 play a role in guiding the drilling of four positioning holes of the crank arm.

As shown in fig. 3, the left support mechanism 7 includes a left bracket 14, a left drill plate 16, a first screw 17, a first pin 15, a first drill bushing 19, and a first bushing 18. Wherein, the left bracket 14 is fixed on the fixture body 8 through screws and plays a main supporting role. The left drill plate 16 is hinged with the left bracket 14 through a first pin 15, the left drill plate 16 can rotate around the first pin 15, and the drilling work state is shown in figure 3. The outer circumference of the first bushing 18 is tightly coupled to the left bushing plate 16. The first drill bushing 19 is mounted in the first bushing 18, and the first drill bushing 19 is limited by a screw fixed on the left drill plate 16. The first screw 17 is screwed on the left bracket 14 to fix the left drill plate 16. When the crank arm is installed, the first screw 17 is loosened, and the left drill plate 16 can be rotated to the other end, so that the crank arm is convenient to install. The right supporting mechanism 4 has the same structure as the left supporting mechanism 7.

As shown in fig. 4, the upper support mechanism 1 includes an upper end bracket 20, a second bushing 21, a second drill bushing 22, and a second screw 23. Wherein, the upper end bracket 20 is fixed on the fixture body 8 through screws, and plays a main supporting role. The second bushing 21 is tightly coupled to the upper end bracket 20, and the second drill bushing 22 is installed in the second bushing 21. The second screw 23 is screwed to the upper end bracket 20 and presses the second drill bushing 22, preventing the second drill bushing 22 from falling out. The lower support mechanism 6 has the same structure as the upper support mechanism 1.

As shown in fig. 5, the coupling mechanism includes a spindle 24, a bearing housing 26, a deep groove ball bearing 25, a thrust ball bearing 27, and a round nut 28. Wherein one end of the mandrel 24 is fixed with the clamp body 8 by a thread. The deep groove ball bearings 25, the bearing sleeve 26 and the thrust ball bearing 27 are connected with the spindle 24, and the two deep groove ball bearings 25 are connected with the base and rotate around the spindle 24. The bearing sleeve 26 serves to protect the thrust ball bearing 27. The round nut 28 is fixed to the other end of the spindle 24 by a screw thread, and axially limits the deep groove ball bearing 25, the bearing sleeve 26, and the thrust ball bearing 27. By controlling the axial clearance between the step of the mandrel 24 and the round nut 28, it is ensured that the clamp body 8 and the base can move relatively.

As shown in fig. 6, the positioning mechanism 3 includes a positioning pin 29 and a positioning drill bushing 30. One positioning drill bushing 30 is fixedly connected with the fixture body 8, the other positioning drill bushing 30 is fixedly connected with the base, and the positioning bolt 29 is inserted into inner holes of the two positioning drill bushings 30 to fix the relative positions of the fixture body 8 and the base. The positioning mechanisms 3 are three in total, two of the positioning mechanisms are used for machining crank arm parts, and one positioning mechanism is used for installing the crank arm parts.

As shown in fig. 7, the bottom surface of the clamp body 8 is attached to the base 31, and the center hole of the clamp body 8 is connected to the connection mechanism by a screw. Base 31 will through the bolt the utility model discloses a crank arm locating hole boring grab fixes on the workstation of drilling machine, realizes the position of three difference respectively through positioning mechanism 3 and anchor clamps body 8. Crank arm processing state, as shown in fig. 8.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims (1)

1. The special vehicle crank arm positioning hole drilling clamp is characterized by comprising an upper clamping mechanism, a lower clamping mechanism, an upper supporting mechanism, a lower supporting mechanism, a left supporting mechanism, a right supporting mechanism, a clamp body, a connecting mechanism, a positioning mechanism and a base; wherein the content of the first and second substances,

the upper clamping mechanism and the lower clamping mechanism are respectively used for clamping two ends of the crank arm and fixing the crank arm; the upper clamping mechanism comprises an upper base, an upper positioning plate, a long lead screw, a long positioning shaft and a V-shaped block; wherein, the upper base is fixed on the fixture body through a screw; the two V-shaped blocks are arranged in the groove of the upper base; the upper positioning plate is connected with the upper base through a screw and used for limiting the V-shaped block to move in the groove of the upper base; the two ends of the long screw rod are respectively provided with left-handed threads and right-handed threads which are respectively matched with the threads in the two V-shaped blocks; the long positioning shaft is fixed on the upper base through a bolt, and a groove of the long positioning shaft is matched with a step part in the middle of the long lead screw and used for limiting the moving direction of the long lead screw; the lower clamping mechanism and the upper clamping mechanism have the same structure;

the left support mechanism, the right support mechanism, the upper support mechanism and the lower support mechanism play a role in guiding the drilling of the crank arm positioning hole;

the left supporting mechanism comprises a left bracket, a left drill plate, a first screw, a first pin, a first drill bushing and a first bushing; wherein, the left bracket is fixed on the fixture body through a screw; the left drill plate is hinged with the left support through a first pin, and the left drill plate can rotate around the first pin; the outer circle of the first bushing is tightly connected with the left drill plate, the first drill bushing is installed in the first bushing, and the first drill bushing is limited by a screw fixed on the left drill plate; the first screw is screwed on the left bracket through threads to fix the left drill plate; the right supporting mechanism and the left supporting mechanism have the same structure;

the upper supporting mechanism comprises an upper end bracket, a second bushing, a second drill bushing and a second screw; wherein, the upper end bracket is fixed on the fixture body through a screw; the second bushing is tightly connected with the upper end bracket, and the second drill bushing is arranged in the second bushing; the second screw is screwed on the upper end bracket through threads and presses the second drill bush to prevent the second drill bush from falling off; the lower supporting mechanism and the upper supporting mechanism have the same structure;

the connecting mechanism comprises a mandrel, a bearing sleeve, a deep groove ball bearing, a thrust ball bearing and a round nut; wherein, one end of the mandrel is fixed with the fixture body through threads; the deep groove ball bearings, the bearing sleeves and the thrust ball bearings are connected with the mandrel, and the two deep groove ball bearings are connected with the base and rotate around the mandrel; the bearing sleeve is used for protecting the thrust ball bearing; the round nut is fixedly connected with the other end of the mandrel through threads, and the deep groove ball bearing, the bearing sleeve and the thrust ball bearing are axially limited; the axial clearance between the mandrel step and the round nut is controlled to ensure that the clamp body and the base can move relatively;

the positioning mechanism comprises a positioning bolt and a positioning drill bushing; one positioning drill bushing is fixedly connected with the clamp body, the other positioning drill bushing is fixedly connected with the base, the positioning bolt is inserted into inner holes of the two positioning drill bushings, and the relative positions of the clamp body and the base are fixed;

the bottom surface of the clamp body is attached to the base, and the center hole of the clamp body is connected with the connecting mechanism through threads.

Images