CN215598705U

CN215598705U - Detection positioning structure of precision forging straight bevel gear

Info

Publication number: CN215598705U
Application number: CN202121397568.3U
Authority: CN
Inventors: 刘波; 王健
Original assignee: Hande Axle Zhuzhou Gear Co ltd
Current assignee: Hande Axle Zhuzhou Gear Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2022-01-21
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a detection positioning structure of a precision forging straight bevel gear, which comprises a base (1), a positioning end surface (6) and a positioning outer diameter (7); the ball bearing structure is characterized in that a ball (3) is mounted on the upper surface of a base (1), part of ball bodies of the ball (3) are embedded in a mounting groove (8) of the base (1), a first through hole (10) is formed in the center of the ball (3), the ball (3) is fixed through a fixing rod by the first through hole (10) and the mounting groove (8), and an elastic compression structure is arranged on the fixing rod and used for adjusting the position of the ball (3). This structure adopts a set of ball, and its position degree and precision are high, have guaranteed to be detected the gear positioning accuracy height and measure accurately. Due to the spherical characteristic of the balls, a detection positioning structure of one specification can be used for positioning and detecting finish forged straight bevel gears of different sizes within a certain range; after the balls with different sizes are replaced, the precision forging straight bevel gears with different sizes and a larger range can be expanded, positioned and detected; the versatility is strong.

Description

Detection positioning structure of precision forging straight bevel gear

Technical Field

The utility model relates to the field of gear detection, in particular to a detection positioning structure for precision forging of a straight bevel gear.

Background

The differential is an important component in an automobile, in order to make an automobile differential system compact and meet the requirement of transmitting large torque, most of differential gears adopt a technology of precisely forging a straight bevel gear, namely, the bevel gear of the straight bevel gear is directly formed by precise forging, and then other parts including installation and use parts are processed by taking the bevel gear as a reference. The conventional detection clamp comprises two modes: 1. the tooth die holder mode is that the tooth die holder is processed to form a tooth groove concave surface matched with the tooth profile of the bevel tooth of the detected gear, so that the tooth groove concave surface of the tooth die holder is in surface contact with the tooth surface of the gear to be positioned; 2. and converting a detection reference mode, namely positioning the inner hole by using the mandrel. However, both of these approaches have their disadvantages: 1. the mode of the tooth die holder is directly influenced by processing errors of tooth die holder tooth grooves and finish forging gear bevel teeth, particularly, the finish forging gear bevel teeth are not high in precision due to direct forming by forging, and states of each tooth are different, so that after corresponding directions of tooth die holder tooth grooves and finish forging gear bevel teeth are changed during detection, measurement results are different, and transposition measurement errors occur; the tooth die holder is required to process a tooth groove concave surface which is completely matched with the tooth surface of the detected gear, so that the tooth die holder with one specification is only suitable for one product, and the universality is poor. 2. The conversion of the detection reference mode brings about a conversion reference error, and the detection item result required by the design cannot be directly measured.

Therefore, a detection positioning structure needs to be invented, the precision forging straight bevel gear with different sizes can be positioned and detected, and the detection positioning structure has great practical significance and economic value.

Disclosure of Invention

The utility model provides a detection positioning structure of a precision forging straight bevel gear, aiming at overcoming the defects in the prior art, and the structure has the advantages of high positioning precision, accurate detection and strong universality.

In order to solve the technical problems, the technical scheme is as follows:

the detection positioning structure comprises a base, a positioning end face and a positioning outer diameter; the ball bearing is arranged on the upper surface of the base, part of ball bodies of the ball bearing are embedded in the mounting groove (8) of the base, a first through hole is formed in the center of the ball bearing, the first through hole and the mounting groove fix the ball bearing through a fixing rod, and an elastic compression structure is arranged on the fixing rod and used for adjusting the position of the ball bearing.

Furthermore, the mounting groove is a taper hole, and a second through hole extends from the lower end of the taper hole.

Further, the number of the taper holes is the same as that of the teeth of the gear to be detected.

Furthermore, the first through hole is connected with the second through hole through a fixing rod, the fixing rod is a bolt, and an elastic pressing structure is sleeved at the end part of the screw rod, far away from one side of the ball, of the bolt.

Further, the elastic pressing structure is a spring.

Furthermore, the base is a disc base, and the positioning end face is located at the lower end of the disc base.

Further, the balls are a group of balls which are circumferentially arranged on the surface of the disc base; and all tooth surfaces of the gear to be measured are in contact positioning with a group of balls.

The upper end of a disc base of the structure is provided with a group of taper holes with the number corresponding to the number of teeth of a detected gear, the large ends of the group of taper holes are consistent in size, and the lower ends of the taper holes are provided with through holes II; a group of balls are placed in the group of conical holes, the group of balls are consistent in size, and one ball is placed in each conical hole; a first through hole is formed in the center of the inner part of the ball, a bolt penetrates through the first through hole of the ball and a taper hole and a second through hole of the disc base, then a spring is sleeved on the rod part of the bolt, and the bolt is screwed tightly by a nut; meanwhile, all tooth surfaces of the detected gear are in contact positioning with a group of balls.

Compared with the prior art, the utility model has the beneficial effects that:

this structure adopts a set of ball, and its position degree and precision are high, have guaranteed to be detected the gear positioning accuracy height and measure accurately. Due to the spherical characteristic of the balls, a detection positioning structure of one specification can be used for positioning and detecting finish forged straight bevel gears of different sizes within a certain range; after the balls with different sizes are replaced, the precision forging straight bevel gears with different sizes and a larger range can be expanded, positioned and detected; the versatility is strong.

Whole precision forging straight bevel gear's detection location structure forms a collaborative whole with measurement process through ball, mounting groove, through-hole one, dead lever, elasticity compact structure, is applicable to the use of multiple gear model, and the practicality is strong.

In conclusion, the detection positioning structure for the finish forging straight bevel gear effectively improves the detection efficiency and the detection precision and is beneficial to popularization.

Drawings

Fig. 1 is a schematic structural view of a detection positioning structure of a finish forged straight bevel gear according to the present invention.

Fig. 2 is a schematic cross-sectional view of a sensing and locating knot of the finish forged straight bevel gear of fig. 1.

1-base, 2-bolt, 3-ball, 4-spring, 5-nut, 6-positioning end face, 7-positioning external diameter,. 8-mounting groove, 9-through hole II and 10-through hole I.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 and fig. 2, the present embodiment discloses a detection positioning structure for finish forging of a straight bevel gear, which includes a base 1, a positioning end surface 6 and a positioning outer diameter 7; the base 1 in this embodiment is a disc base, the positioning end face 6 is located at the lower end of the disc base 1, and the positioning outer diameter 7 is the outer edge of the disc base.

The upper surface of the base 1 is provided with balls 3, and the balls 3 are a group and are circumferentially arranged on the surface of the disc base; all tooth surfaces of the gear to be measured are in contact positioning with a group of balls 3. Specifically, the ball 3 is partially embedded in the mounting groove 8 of the base 1, a first through hole 10 is formed in the center of the ball 3, the ball 3 is fixed by the first through hole 10 and the mounting groove 8 through a fixing rod, and an elastic compression structure is arranged on the fixing rod and used for adjusting the position of the ball 3. The preferred mounting groove 8 of this embodiment is a taper hole, the lower end of the taper hole extends to form a second through hole 9, and the number of the taper holes is the same as the number of teeth of the gear to be detected. The ball 3 that this detection location structure chose for use sets up for a set of circumference, and the elastic compression structure under the cooperation its dead lever can effective positioning gear, makes its location firm, has guaranteed the detection precision. And the structure is simple to prepare, low in cost and more suitable for popularization and use.

The first through hole 10 is connected with the second through hole 9 through a fixing rod, the fixing rod is a bolt 2, an elastic pressing structure is sleeved at the end of a screw rod, far away from the ball 3, of the bolt 2, and the elastic pressing structure is a spring 4; the end of the bolt 2 is provided with a nut 5 that engages with the bolt 2.

The same or similar reference numerals correspond to the same or similar parts; the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent. It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A detection positioning structure of a precision forging straight bevel gear is characterized by comprising a base (1), a positioning end face (6) and a positioning outer diameter (7); the ball bearing structure is characterized in that a ball (3) is mounted on the upper surface of a base (1), part of ball bodies of the ball (3) are embedded in a mounting groove (8) of the base (1), a first through hole (10) is formed in the center of the ball (3), the ball (3) is fixed through a fixing rod by the first through hole (10) and the mounting groove (8), and an elastic compression structure is arranged on the fixing rod and used for adjusting the position of the ball (3).

2. The detecting and positioning structure for the finish forged straight bevel gear according to claim 1, wherein the mounting groove (8) is a tapered hole, and a second through hole (9) extends from the lower end of the tapered hole.

3. The detecting and positioning structure for the finish forged straight bevel gear according to claim 1, wherein the number of the tapered holes is the same as the number of teeth of the gear to be detected.

4. The detecting and positioning structure for the finish forging straight bevel gear according to claim 2, wherein the first through hole (10) is connected with the second through hole (9) through a fixing rod, the fixing rod is a bolt (2), and an elastic pressing structure is sleeved at the end of a screw rod on one side of the bolt (2) far away from the ball (3).

5. The detecting and positioning structure for the finish forged straight bevel gear according to claim 4, wherein said elastic pressing structure is a spring (4).

6. The detecting and positioning structure for the finish forged straight bevel gear according to claim 2, wherein the base (1) is a disc base, and the positioning end surface (6) is located at the lower end of the disc base (1).

7. The detecting and positioning structure for the finish forged straight bevel gear according to claim 6, wherein said balls (3) are a group of balls circumferentially mounted on the surface of a disc base; all tooth surfaces of the gear to be measured are in contact positioning with a group of balls (3).