CN211565238U

CN211565238U - Clamping fixture for sensor bracket of automobile exhaust system

Info

Publication number: CN211565238U
Application number: CN201922384088.2U
Authority: CN
Inventors: 向望洪
Original assignee: Fj Industries Ningbo Machinery Co ltd
Current assignee: Fj Industries Ningbo Machinery Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-09-25
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a clamping fixture for a sensor bracket of an automobile exhaust system, which comprises a main shaft, a fixed cylinder and a positioning column, wherein the fixed cylinder is sleeved on the main shaft, a rotation stopping structure is arranged between the fixed cylinder and the main shaft, and the fixed cylinder is provided with a positioning hole; the main shaft is provided with a connecting hole, the positioning column is in threaded connection with the connecting hole, the positioning column is provided with a mounting hole, the mounting hole is provided with a push column, the push column is provided with a positioning groove, and a magnetic block is arranged in the positioning groove; the positioning column is provided with a through hole, an iron column is arranged in the through hole in a sliding mode, a guide surface is arranged at the end part of the iron column, and the iron column is matched with the positioning groove in a positioning mode; an elastic reset piece is arranged between the push column and the mounting hole, and when the push column is pushed into the mounting hole to compress the elastic reset piece, the end part of the iron column is inserted into the positioning groove. The utility model has the advantages of it is following and effect: the new mechanical structure of this scheme utilization has the effect that the location effect is better, the machining precision is higher, the spoilage is less.

Description

Clamping fixture for sensor bracket of automobile exhaust system

Technical Field

The utility model relates to an anchor clamps technical field, in particular to clamping anchor clamps are used to automobile exhaust system sensor support.

Background

The sensor bracket of the automobile exhaust system is a main mounting part of the exhaust system and is used for positioning and mounting sensor parts. As shown in fig. 1 and 2, the sensor support 1 includes a support head 11 and a support tail 12, the outer diameter of the support head 11 is greater than the outer diameter of the support tail 12, a communication hole 13 is formed in the center of the sensor support 1, the side wall of the support head 11 is set as an annular curved surface 14, a notch 111 is formed in the outer side wall of the support head 11, an annular groove 112 is formed in the inner side wall of the support head 11, a chamfered surface 113 is formed at one end of the communication hole 13 of the support head 11, and a notch 121 is formed in the circumferential direction of the side.

When the chamfer surface of the sensor support is machined, the sensor support is directly clamped on the main shaft to be fixed by a mode of arranging a clamping block on the main shaft of a lathe, then the lathe is started, and the main shaft of the lathe rotates and drives the sensor support to move towards the cutter to machine the chamfer surface.

However, the above processing procedure has the following disadvantages: when the clamp splice was with sensor holder centre gripping on the main shaft, the clamping area between clamp splice and the sensor holder was less, if the centre gripping dynamics is less, then appears not hard up phenomenon easily in the course of working to influence the machining precision, if the centre gripping dynamics is great, then easily make sensor holder wholly take place deformation, cause the damage even.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a clamping anchor clamps for automobile exhaust system sensor support adopts and is spacing with the sensor support location between main shaft and the solid fixed cylinder and with reference column axial, has the better, the machining precision of location effect is higher, the less effect of spoilage of rate of damage.

The above technical purpose of the present invention can be achieved by the following technical solutions: a clamping fixture for a sensor bracket of an automobile exhaust system comprises a main shaft, a fixed cylinder and a positioning column, wherein the fixed cylinder is coaxially sleeved on the main shaft, a rotation stopping structure is arranged between the fixed cylinder and the main shaft, and a positioning hole is formed in the center of the fixed cylinder;

the spindle is coaxially provided with a connecting hole, the positioning column is in threaded connection with the connecting hole, a mounting hole is axially formed in the positioning column, a push column is arranged in the mounting hole, the side wall of the push column is provided with a plurality of positioning grooves, and magnetic blocks are arranged in the positioning grooves;

a plurality of through holes are radially formed in the side wall of the positioning column, iron columns which are attracted and matched with the magnetic blocks are arranged in the through holes in a sliding mode, guide surfaces are arranged at the end parts, close to the pushing columns, of the iron columns, and the iron columns are in positioning matching with the positioning grooves;

be provided with the elasticity piece that resets between pushing away post and the mounting hole, elasticity piece one end that resets is fixed in the mounting hole, and the elasticity resets the other end and is fixed in the pushing away post, when pushing away the post and pushing to the mounting hole in compression elasticity piece that resets, iron prop tip inserts to the constant head tank.

By adopting the technical scheme, when the sensor support is clamped and positioned, the sensor support is arranged on the fixed cylinder, the front end of the head of the support extends out of the positioning hole, the annular curved surface abuts against and is limited by the periphery of the positioning hole, then the fixed cylinder is sleeved on the main shaft along the axial direction, the end part of the main shaft abuts against the sensor support, the tail part of the support extends into the connecting hole, and the fixed cylinder and the main shaft are relatively prevented from rotating under the action of the rotation preventing structure; in pressing into the reference column with the push post, when the iron prop was aimed at just to the positioning groove, the magnetic path inhaleed the iron prop to the constant head tank, with reference column threaded connection in the connecting hole this moment, loosen the pressing to the push post afterwards, elasticity resets and orders about the push post and to the mounting hole outward movement, under the guiding action of spigot surface, the iron prop tip breaks away from the constant head tank and supports in the push post lateral wall, can make the iron prop outer end insert the annular groove to the sensor support in, the both sides of iron prop offset with the both sides of annular groove respectively, so, can carry out axial spacing to the sensor support. When the sensor bracket is subjected to chamfering surface processing, the positioning effect is good, the processing precision is high, and the damage rate is low.

The utility model discloses a further set up to: the rotation stopping structure comprises a rotation stopping block, a first rotation stopping groove is formed in the side wall of the main shaft, a second rotation stopping groove is formed in the inner wall of the fixed cylinder, the rotation stopping block is fixedly connected to the second rotation stopping groove through a bolt, and the rotation stopping block is in plug-in fit with the first rotation stopping groove.

Through adopting above-mentioned technical scheme, when fixed cylinder cover was located on the main shaft, the fixed position of splining along first splining groove insert the location, so, can restrict the circumferential direction between fixed cylinder and the main shaft.

The utility model discloses a further set up to: the elastic reset piece is set as a reset spring, and the reset spring enables the push column to always have the trend of moving towards the outside of the mounting hole.

The utility model discloses a further set up to: the end part of the positioning column is provided with an extending part, the extending part is provided with a baffle ring, the end part of the push column is provided with a stop block which is matched with the baffle ring in a propping manner, a sliding cavity is formed between the baffle ring and the end part of the positioning column, and the stop block slides in the sliding cavity.

Through adopting above-mentioned technical scheme, keep off the ring and keep off the cooperation with the dog, can prevent to a certain extent that the support pillar breaks away from the reference column.

The utility model discloses a further set up to: the extension part is provided with an embedded groove along the axial direction, the stop block is provided with an insertion groove corresponding to the embedded groove, and the depth of the embedded groove is greater than that of the insertion groove.

Through adopting above-mentioned technical scheme, when reference column threaded connection in the connecting hole, can adopt spanner instrument to insert to embedded groove and inserting groove in, then rotate the spanner and can drive the reference column and rotate, when the spanner inserts the embedded groove, also insert to the inserting groove in simultaneously to promote in the mounting hole with the post that pushes away, when the spanner inserts to the bottom of embedded groove, the iron prop imbeds to the constant head tank in.

The utility model discloses a further set up to: the embedded groove and the inserting groove are both arranged in a cross shape.

The utility model discloses a further set up to: the fixed cylinder comprises a cylinder bottom and a cylinder body, the positioning hole is formed in the center of the cylinder bottom, and the side wall of the positioning hole is provided with a rotation stopping plane.

Through adopting above-mentioned technical scheme, when fixing a sensor support location in the solid fixed cylinder, the breach on the sensor support aims at the plane of splining, so, can restrict the relative solid fixed cylinder rotation of sensor support to a certain extent, and still can play directional effect.

The utility model discloses a further set up to: the guiding surface is set to be circular arc, the positioning groove is set to be a circular arc groove matched with the circular arc guiding surface, and the magnetic block is arranged at the bottom of the positioning groove.

To sum up, the utility model discloses following beneficial effect has:

1. the sensor support is positioned between the main shaft and the fixed cylinder and is axially limited by the positioning column, and when a chamfer surface is machined, the positioning effect is good, the machining precision is high, and the damage rate is low;

2. the fixed cylinder is fixed on the main shaft, and the main shaft is fixed on the fixed cylinder;

3. the side wall of the positioning hole is provided with a rotation stopping plane which is matched with a notch on the sensor support, so that the rotation stopping effect can be achieved on the one hand, and the directional effect can be achieved on the other hand.

Drawings

Fig. 1 is a schematic diagram of the overall structure relationship of a sensor holder in the prior art.

Fig. 2 is a cross-sectional view of a prior art sensor holder.

Fig. 3 is a schematic structural relationship diagram of the embodiment in which the sensor holder is positioned.

Fig. 4 is an exploded view of the embodiment.

Fig. 5 is a sectional view of the embodiment.

Fig. 6 is an enlarged view of the area a in fig. 5.

In the figure: 1. a sensor holder; 11. a holder head; 111. a notch; 112. an annular groove; 113. chamfering; 12. a bracket tail; 121. a notch; 13. a communicating hole; 14. an annular curved surface; 2. a main shaft; 21. a first rotation stopping groove; 22. connecting holes; 3. a fixed cylinder; 31. a cylinder bottom; 311. positioning holes; 312. a rotation stopping plane; 32. a barrel body; 321. a flange; 322. a wedge-shaped surface; 33. a rotation stopping block; 34. a second rotation stopping groove; 4. a positioning column; 41. mounting holes; 42. a through hole; 43. an extension portion; 431. a baffle ring; 432. a groove is embedded; 5. pushing the column; 51. a stopper; 511. inserting grooves; 52. positioning a groove; 53. a magnetic block; 6. an iron column; 61. a guide surface; 7. a return spring; 8. a slide chamber.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

A clamping fixture for a sensor support of an automobile exhaust system is shown in figures 1 and 2 as a structural diagram of the sensor support 1, and figures 3-6 are the fixture, the fixture comprises a spindle 2, a fixed cylinder 3 and a positioning column 4, the fixed cylinder 3 is coaxially sleeved on the spindle 2, a rotation stopping structure is arranged between the fixed cylinder 3 and the spindle 2, the fixed cylinder 3 comprises a cylinder bottom 31 and a cylinder body 32, a positioning hole 311 is formed in the center of the cylinder bottom 31, and a rotation stopping plane 312 is arranged on the side wall of the positioning hole 311. When the sensor holder 1 is positioned in the fixed cylinder 3, the notch 111 of the sensor holder 1 is aligned with the rotation stop plane 312, so that the sensor holder 1 is restricted from rotating relative to the fixed cylinder 3 to some extent and can also perform an orientation function. The outer side wall of the cylinder body 32, which is far away from the cylinder bottom 31 end, is provided with a flange 321, the flange 321 is provided with a wedge surface 322, when the spindle 2 is mounted on a lathe, after the fixed cylinder 3 is sleeved on the spindle 2, a clamping block on the lathe is clamped on the wedge surface 322, and the fixed cylinder 3 is clamped and fixed relative to the spindle 2 along the axial direction.

As shown in fig. 3 and 4, the rotation stopping structure includes a strip-shaped rotation stopping block 33, a first rotation stopping groove 21 is axially formed in the side wall of the main shaft 2, a second rotation stopping groove 34 corresponding to the first rotation stopping groove 21 is axially formed in the inner wall of the fixed cylinder 3, the rotation stopping block 33 is fixedly connected to the second rotation stopping groove 34 through two bolts, and the rotation stopping block 33 is in insertion fit with the first rotation stopping groove 21. When the fixed cylinder 3 is sleeved on the main shaft 2, the rotation stop block 33 is inserted and positioned along the first rotation stop groove 21, so that the circumferential rotation between the fixed cylinder 3 and the main shaft 2 can be limited.

As shown in fig. 4 and 6, a connecting hole 22 is coaxially formed in the main shaft 2, the rear end of the positioning column 4 is in threaded connection with the connecting hole 22, a mounting hole 41 is axially formed in the front end of the positioning column 4, a push post 5 is slidably arranged in the mounting hole 41, a stop block 51 is arranged at the front end of the push post 5, the integral cross section of the stop block 51 and the push post 5 is in a T shape, four positioning grooves 52 with circular arc-shaped cross sections are circumferentially formed in the side wall of the push post 5, and a magnetic block 53 is arranged at the bottom of each positioning groove; four through holes 42 are radially formed in the side wall of the positioning column 4, an iron column 6 attracted and matched with the magnetic block 53 is slidably arranged in the through holes 42, an arc-shaped guide surface 61 is arranged at the end part, close to the push column 5, of the iron column 6, and the iron column 6 is in positioning matching with the positioning groove 52. A reset spring 7 is arranged between the push column 5 and the mounting hole 41, one end of the reset spring 7 is fixed on the inner wall of the mounting hole 41, the other end of the reset spring 7 is fixed on the end part of the push column 5, the reset spring 7 enables the push column 5 to always have a trend of moving outwards of the mounting hole 41, and when the push column 5 is pushed into the mounting hole 41 and compresses the reset spring 7, the end part of the iron column 6 is inserted into the positioning groove 52.

As shown in fig. 5 and 6, an extending portion 43 is disposed at the front end of the positioning column 4, the extending portion 43 is provided with a stop ring 431, the stopper 51 is in abutting engagement with the stop ring 431, a sliding cavity 8 is formed at the end portion of the stop ring 431 and the positioning column 4, the stopper 51 slides in the sliding cavity 8, and the stop ring 431 and the stopper 51 are in abutting engagement to prevent the pushing column 5 from being separated from the positioning column 4 to a certain extent. The extending portion 43 is axially provided with an inserting groove 432, the stop block 51 is provided with an inserting groove 511 communicated with the inserting groove 432, the depth of the inserting groove 432 is larger than that of the inserting groove 511, and the inserting groove 432 and the inserting groove 511 are both arranged in a cross shape.

The utility model discloses a basic operating principle does: the utility model discloses when carrying out centre gripping location to sensor support 1, install sensor support 1 on fixed cylinder 3, the front end of support head 11 stretches out locating hole 311, breach 111 aims at spline plane 312, annular curved surface 14 offsets spacing with locating hole 311 periphery, then overlaps fixed cylinder 3 on main shaft 2 along the axial, main shaft 2 tip supports in sensor support 1, support afterbody 12 stretches into in connecting hole 22, makes the relative spline between fixed cylinder 3 and the main shaft 2 under the effect of the structure of splines; a wrench tool is inserted into the insertion groove 432 and the insertion groove 511, and then the positioning column 4 is driven to rotate by rotating the wrench, when the wrench is inserted into the insertion groove 432, and also inserted into the insertion groove 511, and the push post 5 is pushed toward the installation hole 41 until the wrench is inserted into the bottom of the insertion groove 432, and at this time, the positioning slot 52 is aligned with the iron column 6, the magnetic block 53 sucks the iron column 6 into the positioning slot 52, then the positioning column 4 is screwed into the connecting hole 22, then the pressing of the push column 5 is released, the return spring 7 drives the push column 5 to move towards the outside of the mounting hole 41, under the guiding action of the guiding surface 61, the end of the iron post 6 is separated from the positioning slot 52 and is pressed against the side wall of the pushing post 5, can make the iron prop 6 outer end insert to the annular groove 112 in, the both sides of iron prop 6 offset with the both sides of annular groove 112 respectively, so, can carry out axial spacing to sensor support 1. When the chamfer surface 113 of the sensor bracket 1 is processed, the positioning effect is good, the processing precision is high, and the damage rate is low.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. The utility model provides an automobile exhaust system sensor clamping anchor clamps for support which characterized in that: the anti-rotation device comprises a main shaft (2), a fixed cylinder (3) and a positioning column (4), wherein the fixed cylinder (3) is coaxially sleeved on the main shaft (2), a rotation stopping structure is arranged between the fixed cylinder (3) and the main shaft (2), and a positioning hole (311) is formed in the center of the fixed cylinder (3);

the spindle (2) is coaxially provided with a connecting hole (22), the positioning column (4) is in threaded connection with the connecting hole (22), a mounting hole (41) is axially formed in the positioning column (4), a push column (5) is arranged in the mounting hole (41), the side wall of the push column (5) is provided with a plurality of positioning grooves (52), and magnetic blocks (53) are arranged in the positioning grooves (52);

a plurality of through holes (42) are formed in the side wall of the positioning column (4) along the radial direction, iron columns (6) which are attracted and matched with the magnetic blocks (53) are arranged in the through holes (42) in a sliding mode, guide surfaces (61) are arranged at the end portions, close to the push column (5), of the iron columns (6), and the iron columns (6) are matched with the positioning grooves (52) in a positioning mode;

push away post (5) with be provided with the elasticity piece that resets between mounting hole (41), elasticity piece one end that resets is fixed in mounting hole (41), the elasticity resets the other end and is fixed in push away post (5), works as push away post (5) push towards compress in mounting hole (41) when the elasticity resets, iron prop (6) tip insert to constant head tank (52).

2. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 1, characterized in that: the rotation stopping structure comprises a rotation stopping block (33), a first rotation stopping groove (21) is formed in the side wall of the main shaft (2), a second rotation stopping groove (34) is formed in the inner wall of the fixed cylinder (3), the rotation stopping block (33) is fixedly connected to the second rotation stopping groove (34) through a bolt, and the rotation stopping block (33) is in plug-in fit with the first rotation stopping groove (21).

3. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 1, characterized in that: the elastic reset piece is set to be a reset spring (7), and the reset spring (7) enables the push column (5) to always have the trend of moving towards the outside of the mounting hole (41).

4. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 1, characterized in that: the end part of the positioning column (4) is provided with an extending part (43), the extending part (43) is provided with a retaining ring (431), the end part of the push column (5) is provided with a stop block (51) matched with the retaining ring (431) in a supporting manner, a sliding cavity (8) is formed at the end parts of the retaining ring (431) and the positioning column (4), and the stop block (51) slides in the sliding cavity (8).

5. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 4, characterized in that: the extension part (43) is axially provided with an embedded groove (432), the stop block (51) is provided with an insertion groove (511) corresponding to the embedded groove (432), and the depth of the embedded groove (432) is greater than that of the insertion groove (511).

6. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 5, characterized in that: the embedded groove (432) and the inserting groove (511) are both arranged in a cross shape.

7. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 1, characterized in that: the fixed barrel (3) comprises a barrel bottom (31) and a barrel body (32), the positioning hole (311) is formed in the center of the barrel bottom (31), and a rotation stopping plane (312) is arranged on the side wall of the positioning hole (311).

8. The clamping fixture for the sensor bracket of the automobile exhaust system according to claim 1, characterized in that: the guide surface (61) is arc-shaped, the positioning groove (52) is arc-shaped and matched with the arc-shaped guide surface (61), and the magnetic block (53) is arranged at the bottom of the positioning groove (52).