A rotary fixture for detecting CV joint torque

Abstract

This invention discloses a rotary fixture for detecting CV joint torque. A servo motor is fixed to the lower plate of a support frame, and the output shaft is connected to a rotating shaft via a coupling. The rotating shaft is fixed to the upper plate of the support frame via bearings. Two or three locking claws are rotatably and uniformly fixed to the upper end wall of the rotating shaft. The support base is a cylinder with a central hole. Its upper end matches the portion from the bearing end face to the upper end of the external spline of the CV joint. An internal spline matching the external spline of the CV joint is provided on the central hole wall at the lower end of the upper end of the upper end. A locking step protrudes from the lower end of the support base, or a support base plate with an outer diameter larger than its own is fixed to its lower end face. The locking claws are locked and fixed to the locking step or support base plate of the support base. This invention is used in conjunction with a manually operated torque detection device. It has a simple structure, low manufacturing cost, and can be applied to the torque detection of CV joints of various drive shafts by simply changing the support base to suit different CV joints, thus having a wide range of applications.

Description

Technical Field

[0001] This invention belongs to the field of CV joint testing instruments and relates to a rotary fixture for detecting CV joint torque. Background Technology

[0002] The CV joint is an important component in automotive drive shafts. During the production of CV joints, torque testing is required. Existing rotary fixtures for CV joint torque testing are only suitable for torque testing of CV joints in S202 drive shafts. The upper CV joint support base consists of inner and outer sleeves fixed together, and other structures are used in conjunction with fully automatic torque testing equipment for mechanical loading and unloading. Its overall structure is complex and costly, and it is not suitable for testing the rotational torque of CV joints in KX11 and PPC drive shafts. Furthermore, when the torque testing equipment only requires manual loading and unloading, this fixture becomes even more impractical. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned problems in the prior art and provide a rotary fixture for detecting CV joint torque. This rotary fixture is used in conjunction with a manual loading and unloading torque detection device. It has a simple structure, low manufacturing cost, and by simply changing the upper part of the rotary fixture, it can be applied to the detection of CV joint torque of various drive shafts, thus having a wide range of applications.

[0004] To achieve the above objectives, the technical solution of the present invention is: a rotary tooling for detecting the torque of a CV section, comprising a support base, a rotating shaft, a support frame, and a servo motor; the servo motor is fixed on the lower plate of the support frame, and its output shaft is connected to the lower end of the rotating shaft via a coupling; the rotating shaft is fixed to the upper plate of the support frame via bearings; two or three locking claws are uniformly and rotatably fixed on the upper end wall of the rotating shaft; the support base is a cylinder with a central hole, the upper end of which matches the portion from the bearing end face of the CV section to the upper end of the external spline; the lower end of the central hole of the upper end of the upper end is provided with an internal spline that matches the external spline of the CV section; a locking step protrudes from the lower end of the support base, or a support base plate with an outer diameter larger than its outer diameter is fixed on its lower end surface; the locking claws on the rotating shaft are locked and fixed to the locking step or support base plate of the support base; after the CV section is installed, the distance from the center plane of the CV section steel ball to the lower end face of the support base or the lower end face of the support base plate remains unchanged, ensuring the relative position of the CV section on the equipment; the central axes of the support base, the rotating shaft, and the output shaft of the servo motor coincide.

[0005] More preferably, the specific structure in which the locking claw is rotatably fixed to the upper end wall of the rotating shaft is as follows: the outer wall of the upper end of the rotating shaft is an I-shaped structure, consisting of an upper end plate, a lower end plate, and an inner concave cylindrical wall; the middle part of each locking claw is fixed to a protruding block that is uniformly protruding from the upper end plate by a horizontal pin, and a spring is fixed to the lower end; the locking boss at the upper end is locked to the locking step or support base plate fixed to the support base; the other end of the spring is fixed to the spring groove opened in the inner concave cylindrical wall.

[0006] More preferably, the structure of the upper port of the support base that matches the portion from the bearing end face of the CV section to the upper end of the external spline is as follows: the upper part of the upper port of the support base is a plane that matches the bearing end face of the CV section, and the lower part is a conical hole that matches the portion from the internal spline to the plane. This is suitable for detecting the torque of the CV section in the KX11 drive shaft.

[0007] More preferably, the structure of the upper port of the support base that matches the portion from the bearing end face to the upper end of the external spline of the CV section is as follows: the upper port of the support base is a plane that matches the bearing end face of the CV section, and there is a stepped hole between the internal spline and this plane. The stepped hole, from top to bottom, consists of: a large cylindrical hole, a large tapered hole, a small cylindrical hole, and a small tapered hole. This is suitable for detecting the torque of the CV section in PPC drive shafts and S202 drive shafts.

[0008] In use, the CV section is installed on the upper port and internal spline of the support base. The upper plate of the support frame utilizes the working platform of the CV section torque testing equipment. After installation, the torque testing rod is inserted into the central shaft hole of the star-shaped frame inside the CV section, and the servo motor is started to rotate, completing the torque test of the CV section. This invention's rotary fixture is used in conjunction with a manual loading and unloading torque testing equipment. It has a simple structure, low manufacturing cost, and by simply changing the support base to suit different CV sections, it can be used to test the CV section torque of various drive shafts such as the KX11 drive shaft, PPC drive shaft, and S202 drive shaft, making it widely applicable. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0010] Figure 2 This is a front view of the first embodiment of the present invention;

[0011] Figure 3 This is a front sectional view of the first embodiment of the support base in this invention;

[0012] Figure 4 This is a front view of the second embodiment of the present invention;

[0013] Figure 5 This is a front sectional view of a second embodiment of the support base in this invention. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments.

[0015] Example 1, such as Figure 1 , Figure 2 and Figure 3 The torque detection rotary fixture used in the CV section 1 structure shown in this embodiment includes a support base 2, a rotating shaft 5, a support frame 7, and a servo motor 9. The servo motor 9 is fixed on the lower plate 8 of the support frame, and its output shaft is connected to the lower end of the rotating shaft 5 through a coupling 10. The rotating shaft 5 is fixed on the upper plate 6 of the support frame through a bearing 11. Two (or three) locking claws 4 are rotatably fixed evenly on the upper end wall of the rotating shaft 5. The optimized structure is as follows: the outer wall of the upper end of the rotating shaft 5 is an I-shaped structure, consisting of an upper end plate 51, a lower end plate 53, and an inner concave cylindrical wall 52; the middle part of each locking claw 4 is fixed by a horizontal pin 3 to a protruding block that is evenly protruding on the upper end plate, and a spring 54 is fixed at the lower end. The locking boss at the upper end is locked onto the support base plate 26 (or the locking step of the support base 2) fixed to the support base 2; the other end of the spring 54 is fixed to a spring groove opened on the inner concave cylindrical wall 52. The support base 2 is a cylinder with a central hole. Its upper port matches the portion from the bearing end face 15 of the CV section to the upper end of the external spline. Specifically, the upper part 27 of the upper port of the support base is a plane that matches the bearing end face 15 of the CV section, and the lower part 28 is a conical hole that matches the portion between the internal spline and this plane. An internal spline 29 matching the external spline of the CV section 1 is provided on the wall of the central hole at the lower end of the upper port. A support base plate 26 with an outer diameter larger than the lower end of the support base 2 is fixed to the lower end face of the support base 2 by screws (or a step protruding from the lower end of the support base 2, but this is difficult to achieve in terms of manufacturing). After the CV section is installed, the distance from the center plane 12 of the CV section steel ball to the lower end face of the support base plate 26 (or the distance from the center plane 12 of the CV section steel ball to the lower end face of the support base 26) remains unchanged, ensuring the relative position of the CV section 1 on the equipment. The central axes of the support base 2, the rotating shaft 5, and the output shaft of the servo motor 9 coincide. This method is suitable for detecting the torque of the CV section of the KX11 drive shaft.

[0016] Example 2, as Figure 1 , Figure 4 and Figure 5The torque detection rotary fixture used in another CV section 14 structure shown is also described in Embodiment 1. The structure of the upper port of the support base 2, which matches the portion from the bearing end face 13 of the CV section to the upper end of the external spline, is as follows: the upper port of the support base 2 is a plane matching the bearing end face 13 of the CV section 1. A stepped hole exists between the internal spline 25 and this plane. From top to bottom, the stepped hole consists of: a large cylindrical hole 21, a large conical hole 22, a small cylindrical hole 23, and a small conical hole 24. This fixture is suitable for detecting the torque of the middle CV section of a PPC drive shaft.

[0017] The above-described embodiments are merely preferred and exemplary and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary fixture for detecting CV joint torque, characterized in that: The system includes a support base, a rotating shaft, a support frame, and a servo motor. The servo motor is fixed to the lower plate of the support frame, and its output shaft is connected to the lower end of the rotating shaft via a coupling. The rotating shaft is fixed to the upper plate of the support frame via bearings. Two or three locking claws are rotatably and uniformly fixed to the upper end wall of the rotating shaft. The support base is a cylinder with a central hole. Its upper end matches the portion from the bearing end face of the CV section to the upper end of the external spline. An internal spline matching the external spline of the CV section is provided on the central hole wall at the lower end of the upper end. A locking step protrudes from the lower end of the support base, or a support base plate with an outer diameter larger than its own is fixed to its lower end face. The locking claws on the rotating shaft are locked to the locking step or support base plate of the support base. After the CV section is installed, the distance from the center plane of the CV section steel ball to the lower end face of the support base or the lower end face of the support base plate remains unchanged, ensuring the relative position of the CV section on the equipment. The central axes of the support base, the rotating shaft, and the servo motor output shaft coincide. The specific structure of the locking claw rotatably fixed to the upper end wall of the rotating shaft is as follows: the outer wall of the upper end of the rotating shaft is an I-shaped structure, consisting of an upper end plate, a lower end plate, and an inner concave cylindrical wall; the middle part of each locking claw is fixed to the protruding block that is uniformly protruding on the upper end plate by a horizontal pin shaft, and a spring is fixed at the lower end; the locking boss at the upper end is locked onto the locking step or support base plate fixed to the support base; the other end of the spring is fixed to the spring groove opened in the inner concave cylindrical wall.

2. The CV joint torque detection rotary fixture according to claim 1, characterized in that: The structure of the upper port of the support base that matches the portion from the bearing end face of the CV section to the upper end of the external spline is as follows: the upper part of the upper port of the support base is a plane that matches the bearing end face of the CV section, and the lower part is a conical hole that matches the portion from the internal spline to the plane.

3. The CV joint torque detection rotary fixture according to claim 1, characterized in that: The structure of the upper port of the support base that matches the bearing end face of the CV section to the upper end of the external spline is as follows: the upper port of the support base is a plane that matches the bearing end face of the CV section, and there is a stepped hole between the internal spline and the plane. The stepped hole, from top to bottom, is: a large cylindrical hole, a large conical hole, a small cylindrical hole, and a small conical hole.

Images