CN211601828U

CN211601828U - Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile

Info

Publication number: CN211601828U
Application number: CN201922479892.9U
Authority: CN
Inventors: 段修权; 李影; 李辉; 汪涛
Original assignee: Guangde Jinrui Bearing Co ltd
Current assignee: Guangde Jinrui Bearing Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-29
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an utensil is examined to vice female raceway diameter of screw of ball screw detects for car, include: a gauge body; the fixed handle is arranged on the gauge body; the lower measuring block is fixed on the checking fixture body; the linear guide rail is arranged on the checking fixture body; the upper measuring block and the movable handle are arranged on the sliding block of the linear guide rail, and the at least one return spring is arranged between the upper measuring block and the lower measuring block; and the measuring point of the dial indicator is in contact with the upper measuring block. The utility model discloses a use method: the movable handle is pressed downwards, the upper measuring block moves downwards, and the upper measuring block and the lower measuring block are combined. The whole measuring head part is put into an inner hole of the nut, the lower measuring ball of the lower measuring block moves to the center position of the corresponding channel, and the movable handle is loosened to enable the upper measuring ball of the upper measuring block to contact the raceway. The utility model discloses can carry out the rapid survey to screw raceway diameter and profile, it is accurate to have a measurement, easy operation, convenient and fast, advantage such as the cost is lower.

Description

Detection tool for detecting diameter of auxiliary screw nut raceway of ball screw for automobile

Technical Field

The utility model relates to a ball screw detects technical field, in particular to utensil is examined that examines that vice screw raceway diameter of ball screw detected for car for detect the raceway diameter of screw in the ball screw is vice.

Background

At present, more and more products focus on high efficiency of performance, and good performance requires reliable precision as a support. In order to realize batch grinding of nuts in the ball screw pair for the automobile, how to realize rapid and accurate detection becomes a big problem in China at present.

As shown in fig. 1 and 2, a groove 2 of a nut 1 of a ball screw pair for an automobile is an internal thread, a plurality of grooves 2 are distributed along a spiral line, and the measurement of the diameter of the groove 2 cannot be realized by a measuring ball 3 in a common groove diameter gauge. At present, for the inspection of the diameter of the channel 2 of the screw 1, the three-coordinate measurement is generally used domestically, a three-coordinate probe with a specific size is customized according to the requirement of a drawing to scan the outline of the channel 2, the outline of a spiral raceway is generated, and an outline model is measured through measurement software.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the above-mentioned technical problem that exists is detected to current vice nut raceway diameter of ball screw and the utensil of examining that detects of vice nut raceway diameter of ball screw for car that provides a quick, high accuracy, it is according to actual production process needs and an invention examines the utensil.

The utility model discloses the technical problem that will solve can realize through following technical scheme:

the utility model provides an utensil is examined with vice female raceway diameter of ball screw for car, includes:

a gauge body;

the fixed handle is arranged on the gauge body;

the lower measuring block and the fixed handle are positioned on the left side and the right side of the checking fixture body, a plurality of lower protruding thread lines consistent with the thread pitch of the internal thread of the channel of the screw nut to be measured are arranged on the lower measuring block, the radius of the plurality of lower protruding thread lines is smaller than the radius of the channel of the screw nut to be measured and the radius of the steel ball, two lower measuring balls are respectively arranged on the first lower protruding thread line and the last lower protruding thread line, and the diameters of the four lower measuring balls are designed according to drawing measuring balls;

the linear guide rail is arranged on the checking fixture body;

the upper measuring block and the movable handle are arranged on the sliding block of the linear guide rail, and the lower measuring block and the movable handle are positioned on the left side and the right side of the lower measuring block; an upper convex thread line is arranged in the middle of the upper measuring block, the radius of the upper convex thread line is smaller than that of a channel and a steel ball of a nut to be measured, an upper measuring ball is arranged on the upper convex thread line, and the diameter of the upper measuring ball is designed according to a drawing measuring ball;

at least one reset spring arranged between the upper measuring block and the lower measuring block;

and the measuring point of the dial indicator is in contact with the upper measuring block.

In a preferred embodiment of the present invention, a limit screw is disposed on the checking fixture body, and the limit screw limits the limit position of the upper measuring block away from the lower measuring block.

In a preferred embodiment of the present invention, at least one guiding post is disposed on the upper measuring block, and at least one guiding hole is disposed on the lower measuring block, and the guiding post is inserted into the corresponding guiding hole.

In a preferred embodiment of the present invention, the return spring is sleeved on the corresponding guide post.

In a preferred embodiment of the present invention, the lower ball is in clearance fit with the lower raised thread, and the upper ball is in clearance fit with the upper raised thread.

Owing to adopted above-mentioned technical scheme, the utility model discloses can carry out the rapid survey to screw raceway diameter and profile, have and measure accurate, easy operation, convenient and fast, advantage such as the cost is lower. The utility model discloses it is significant to miniature automobile ball screw's production.

Drawings

Fig. 1 is a schematic structural view of a conventional nut.

Fig. 2 is a schematic view showing a measuring ball in a conventional groove diameter gauge measuring a raceway of a nut.

Fig. 3 is the utility model discloses the structure schematic diagram of the utensil of examining that vice screw raceway diameter of ball screw detected for the car.

Fig. 4 is the utility model discloses the vice female raceway diameter of screw detects for car decomposes the schematic diagram.

Detailed Description

The invention is further described below with reference to the accompanying drawings and the detailed description.

Referring to fig. 3 and 4, the gauge for detecting the diameter of the ball screw pair nut raceway for the automobile comprises a gauge body 50, a measuring head part and a dial indicator 10, wherein the dial indicator 10 can be a digital display dial indicator.

The measuring head part of the gauge comprises an upper measuring block 60 and a lower measuring block 70, the lower measuring block 70 is fixed on a gauge body 50, a fixed handle 30 is further fixed on the gauge body 50, and the lower measuring block 70 and the fixed handle 30 are located on the left side and the right side of the gauge body 50.

The linear guide rail 51 is installed on the checking fixture body 50, the upper measuring block 60 and the movable handle 20 are assembled together and installed on the sliding block of the linear guide rail 51, so that the upper measuring block 60 and the movable handle 20 can move up and down along the linear guide rail 51. This allows the upper block 60 to move flexibly along the linear guide 51, and the movement accuracy is also high. A limiting screw 40 is mounted on the checking fixture body 50, and the limiting screw 40 limits the limit position of the upper measuring block 60 far away from the lower measuring block 70.

Four lower convex

spiral lines

71, 72, 73 and 74 which are consistent with the thread pitch of the internal thread of the channel of the nut 1 to be measured are distributed on the lower measuring block 70, and the radiuses of the four lower convex

spiral lines

71, 72, 73 and 74 are smaller than the radiuses of the channel 2 of the nut 1 and the steel ball. Two

lower measuring balls

71a and 74a are respectively distributed on the first lower convex spiral line 71 and the fourth lower convex spiral line 74, and the diameters of the four

lower measuring balls

71a and 74a are designed according to a drawing measuring ball. The four

lower balls

71a, 74a are first positioned at the bottom of the groove 2 on the side of the internal thread of the nut 2 when measuring.

An upper convex spiral line 61 which is consistent with the thread pitch of the internal thread of the channel of the screw nut 1 to be measured is distributed in the middle of the upper measuring block 60, and the upper convex spiral line 61 is located in the middle of the four lower convex

spiral lines

71, 72, 73 and 74. The radius of the lower convex spiral line 61 is also smaller than the radius of the channel 2 and the steel ball of the nut 1. Be provided with one down and survey ball 61a on protruding helix 61 down, should survey ball 61a down and will contact the internal threaded opposite side channel 2 bottom of screw 1 when measuring,

survey ball

71a, 74a and one down through four and survey ball 61a and can realize that whole screw 1 is stable card at the utility model discloses an on survey piece 60 and survey piece 70 down, the inaccurate phenomenon of measuring result can not appear leading to in the slope of screw 1.

Because the screw 1 is finished by grinding a plurality of devices in parallel, the distances of the channels 2 of all the screw 1 have small differences, in order to avoid inaccurate measurement results caused by the differences of the distances of the channels 2 of the parts, two lower measuring balls 71a are in clearance fit with the first lower convex spiral line 71, two lower measuring balls 74a are in clearance fit with the fourth lower convex spiral line 74, and an upper measuring ball 61a is in clearance fit with the upper convex spiral line 61, so that the four

upper measuring balls

71a and 74a and the lower measuring ball 61a can have certain movement, the four

upper measuring balls

71a and 74a and the lower measuring ball 61a can contact the bottoms of the three channels 2, and the accuracy of the channel diameter measurement results is ensured; and the four

upper measuring balls

71a and 74a and the lower measuring ball 61a can flexibly rotate, the gauge can read the groove diameter deviation of any position of the screw 1 by rotating the measuring piece screw 1 in the measuring process, and accordingly the ovality of the channel 2 in the screw 1 is measured.

Two guide posts 62 are arranged on the upper measuring block 60, two guide post holes are also arranged on the lower measuring block 70, the two guide posts 62 are inserted into the corresponding guide post holes, a return spring 80 is respectively sleeved on the two guide posts 62, when acting force is not applied to the movable handle 20, the whole upper measuring block 60 is supported at a constant position by the return spring 80, when a part is measured, the movable handle 20 is held by a hand, the whole upper measuring block 60 moves downwards along the linear guide rail 51, the return spring 80 is compressed at the same time until the upper measuring block 60 is contacted with the lower measuring block 70, the screw 1 to be measured can be arranged on the upper measuring block 60 and the lower measuring block 70, the movable handle 20 is released after the four

lower measuring balls

71a and 74a on the lower measuring block 70 are positioned, and the upper measuring block 60 can be moved by the return spring 80 until the upper measuring ball 61a on the upper measuring block 60 is contacted with the upper groove bottom of the channel 2 of the screw 1 to be measured.

The dial indicator 10 is installed on the gauge body 50, and a measuring point 11 of the dial indicator 10 is in contact with the upper measuring block 60. Meanwhile, due to the fact that the groove diameters of the grooves 2 are different in size and the pressure of a measuring point is different, the difference value between the testing nut 1 and the standard part is directly read through the dial indicator 10, and therefore the groove diameter measurement of the grooves 2 in the nut 1 is completed.

The utility model discloses a use method:

the movable handle 20 is pushed down and the upper block 60 moves down, so that the upper block 60 and the lower block 70 are combined. The whole measuring head part is put into the inner hole of the nut 1, the

lower measuring balls

71a and 74a of the lower measuring block 70 move to the central position corresponding to the channel 2, and the movable handle 20 is released, so that the upper measuring ball 61a of the upper measuring block 60 contacts the raceway.

Claims

1. The utility model provides an utensil is examined with vice female raceway diameter of ball screw for car which characterized in that includes:

a gauge body;

the fixed handle is arranged on the gauge body;

the linear guide rail is arranged on the checking fixture body;

2. The checking fixture for detecting the diameter of the ball screw pair nut raceway for the automobile as claimed in claim 1, wherein a limit screw is provided on said checking fixture body, said limit screw limiting a limit position of said upper block away from said lower block.

3. The tool according to claim 1 or 2, wherein the upper block is provided with at least one guide post, the lower block is provided with at least one guide hole, and the guide post is inserted into the corresponding guide hole.

4. The checking fixture for detecting the diameter of the ball screw pair nut raceway for the automobile according to claim 3, characterized in that the return spring is sleeved on the corresponding guide post.

5. The tool for detecting the diameter of the ball screw pair nut raceway for the automobile according to claim 1 or 2, wherein the lower measuring ball is in clearance fit with the lower convex thread line, and the upper measuring ball is in clearance fit with the upper convex thread line.