Steering gear long pipe inner hole interference detection tool

Abstract

The utility model belongs to the technical field of detection tools, and discloses a steering gear long pipe inner hole interference detection tool which is used for interference detection of a steering gear long pipe inner hole. The detection tool comprises a base and a positioning rod assembly. The positioning rod assembly is fixedly installed in the center of the base. The detection tool further comprises a detection head. The positioning rod assembly comprises a positioning column, a positioning rod and a rotating rod which are coaxial in sequence from bottom to top; the detection head comprises a sleeve, a rod-shaped handle on the top of the sleeve and a plurality of detection columns on the outer wall of the sleeve. The device is simple in structure and convenient to operate; the positioning rod assembly firstly determines the axis of the tail hole by means of the positioning column, and then determines whether the tail hole and the head hole are coaxial or not by detecting whether the detection head can smoothly extend into the head hole or not and smoothly rotate. The detection speed and the detection efficiency are high.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection tooling, in particular to an interference detection tooling for inner holes of a long tube of a steering gear. Background Art

[0002] The function of the steering gear is to appropriately transform the steering torque and steering angle from the steering wheel (mainly to reduce speed and increase torque), and then output it to the steering rod mechanism to make the car turn. Therefore, the steering gear is essentially a reduction transmission device. There are many types of steering gears, such as rack and pinion type, recirculating ball type, worm crank pin type, power steering, etc.

[0003] The steering gear is composed of a variety of different components, among which the steering gear long tube (also called the steering gear housing) is a component in the steering gear. The steering gear long tube is usually cast, and the inner hole of the long tube needs to be interfered with, that is, the coaxiality of the two ends of the inner hole of the long tube is detected; when the coaxiality does not meet the standard, the components installed in the long tube will not work properly. The detection device in the prior art is complicated to operate and has a slow detection speed, which reduces the efficiency of the detection and is in urgent need of improvement. Utility Model Content

[0004] The utility model aims to overcome the existing technical problems and provides a tool for detecting the inner hole interference of a long tube of a steering gear.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:

[0006] A tool for detecting the inner hole interference of a steering gear long tube, wherein the tool is used for detecting the inner hole interference of the steering gear long tube, wherein the inner holes are, from bottom to top, a tail hole, a middle hole, and a head hole; the inner diameters of the tail hole and the head hole are both larger than the inner diameter of the middle hole; the tool comprises a base and a positioning rod assembly, wherein the positioning rod assembly is fixedly mounted at the center of the base; the tool also comprises a detection head;

[0007] The positioning rod assembly includes a positioning column, a positioning rod, and a rotating rod which are coaxial from bottom to top; the positioning column matches the tail hole, the outer diameter of the positioning rod is smaller than the inner diameter of the middle hole, and the outer diameter of the rotating rod is smaller than the outer diameter of the positioning rod; the positioning column is fixedly connected to the positioning rod, and the positioning rod is rotatably connected to the rotating rod;

[0008] The detection head includes a sleeve, a rod-shaped handle on the top of the sleeve, and a plurality of detection columns on the outer wall of the sleeve;

[0009] The inner diameter of the sleeve matches the outer diameter of the rotating rod; a limiting groove is symmetrically distributed on the left and right sides of the sleeve; and limiting protrusions matching the limiting grooves are provided on the left and right sides of the upper part of the rotating rod;

[0010] The detection head is inserted into the head of the rotating rod, and the rotation of the detection head drives the rotating rod to rotate; the detection head is coaxial with the rotating rod; the distance from the end of the detection column to the axis of the sleeve matches one-half of the inner diameter of the head hole.

[0011] Preferably, the tail of the rotating rod extends into the head of the positioning rod, and the tail of the rotating rod is rotatably connected to the head of the positioning rod via a bearing.

[0012] Preferably, the detection column comprises a detection column body and a ball rotatably mounted on the end of the detection column body; the end of the detection column body is conical.

[0013] Preferably, the detection columns are fixed vertically on the outer wall of the sleeve in a left-right staggered manner.

[0014] Preferably, a magnetic ring A is fixedly attached to the lower end surface of the sleeve, and a magnetic ring B fixed on the rotating rod is adsorbed below the magnetic ring A.

[0015] Preferably, a polytetrafluoroethylene plate is adhered to the upper end surface of the base.

[0016] The working principle of this utility model is as follows:

[0017] When the utility model is used, the detection tool is placed on a stable table, the detection head is unplugged, and the tail of the steering gear long tube is downward, so that the positioning rod assembly extends into the inner hole of the steering gear long tube. The positioning column matches the tail hole, the positioning rod passes through the middle hole, and the head of the rotating rod extends out of the head hole; then the detection head is inserted into the rotating rod, and the sleeve with the detection column installed extends into the head hole, and the detection head is rotated. When the detection head can rotate smoothly, the tail hole is coaxial with the head hole. When the detection head cannot be inserted into the head hole, or the detection head cannot rotate smoothly for one circle, the tail hole is not coaxial with the head hole or there is a quality problem with the head hole, and the steering gear long tube is unqualified.

[0018] The positioning rod assembly relies on the positioning column to first determine the axis of the tail hole, and then relies on whether the detection head can smoothly extend into the head hole and rotate smoothly to determine whether the tail hole and the head hole are coaxial.

[0019] The detection head is inserted into the rotating rod, which ensures that the detection head can maintain coaxiality with the rotating rod; the rotating rod and the positioning rod are connected by bearings, which ensure smooth and unobstructed rotation, avoiding friction and wear between the detection head and the rotating rod, and maintaining the coaxial accuracy between the detection head and the rotating rod; there is rolling friction between the ball on the detection column and the inner wall of the head hole, so the friction is small.

[0020] Magnetic rings A and B are attracted to each other to prevent the detection head from moving up and down during detection. The use of polytetrafluoroethylene plates prevents the tail of the steering gear long tube from being damaged by collision.

[0021] Components not limited in the present invention all adopt conventional means in the field. For example, the selection and installation of bearings, and the installation between balls and positioning columns can all be selected by those commonly used in the field. Technical personnel in the field can select their models and installation methods according to actual usage requirements and clearly understand how to install and control them specifically, which will not be described in detail here.

[0022] The utility model achieves the following beneficial effects:

[0023] The utility model has a simple structure and is easy to operate. The positioning rod assembly relies on the positioning column to first determine the axis of the tail hole, and then determines whether the tail hole and the head hole are coaxial by detecting whether the head can smoothly extend into the head hole and rotate smoothly; the detection speed is fast and the detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 for Figure 1 Enlarged view of point E in the middle;

[0026] Figure 3 for Figure 2 Sectional view along line FF;

[0027] Figure 4 This is a state diagram of the utility model when detecting the inner hole of the long tube of the steering gear.

[0028] In the figure: 1. tail hole; 2. middle hole; 3. head hole; 4. base; 5. positioning column; 6. positioning rod; 7. rotating rod; 8. sleeve; 9. rod-shaped handle; 10. detection column; 11. limiting groove; 12. limiting protrusion; 13. bearing; 14. detection column; 15. ball; 16. magnetic ring A; 17. magnetic ring B; 18. polytetrafluoroethylene plate. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0030] Example 1

[0031] like Figures 1 to 4 As shown, the steering gear long tube inner hole interference detection tool is used for interference detection of the steering gear long tube inner hole, the inner holes are tail hole 1, middle hole 2, head hole 3 from bottom to top; the inner diameters of the tail hole 1 and the head hole 3 are both larger than the inner diameter of the middle hole 2; the detection tool includes a base 4 and a positioning rod assembly, and the positioning rod assembly is fixedly installed at the center of the base 4; the detection tool also includes a detection head.

[0032] The positioning rod assembly includes a positioning column 5, a positioning rod 6, and a rotating rod 7 which are coaxial from bottom to top; the positioning column 5 matches the tail hole 1, the outer diameter of the positioning rod 6 is smaller than the inner diameter of the middle hole 2, and the outer diameter of the rotating rod 7 is smaller than the outer diameter of the positioning rod 6; the positioning column 5 is fixedly connected to the positioning rod 6, and the positioning rod 6 is rotatably connected to the rotating rod 7;

[0033] The detection head includes a sleeve 8, a rod-shaped handle 9 on the top of the sleeve 8, and five detection columns 10 on the outer wall of the sleeve 8; the inner diameter of the sleeve 8 matches the outer diameter of the rotating rod 7; a limiting groove 11 is symmetrically distributed on the left and right sides of the sleeve 8; and there are limiting protrusions 12 matching the limiting grooves 11 on the left and right sides of the upper part of the rotating rod 7;

[0034] The detection head is inserted into the head of the rotating rod 7, and the rotation of the detection head drives the rotating rod 7 to rotate; the detection head is coaxial with the rotating rod 7; the distance from the end of the detection column 10 to the axis of the sleeve 8 matches one half of the inner diameter of the head hole 3.

[0035] The tail of the rotating rod 7 extends into the head of the positioning rod 6 , and the tail of the rotating rod 7 is rotatably connected to the head of the positioning rod 6 via a bearing 13 .

[0036] The detection column 10 includes a detection column 14 and a ball 15 rotatably mounted on the end of the detection column 14; the end of the detection column 14 is tapered. The detection columns 10 are vertically fixed on the outer wall of the sleeve 8 in an alternating manner, with three detection columns on the left and two detection columns on the right.

[0037] A magnetic ring A16 is fixedly attached to the lower end surface of the sleeve 8, and a magnetic ring B17 fixed to the rotating rod 7 is adsorbed below the magnetic ring A16. A polytetrafluoroethylene plate 18 is attached to the upper end surface of the base 4.

[0038] The technical solution of the present utility model is not limited to the above-mentioned specific embodiments, and all technical variations made according to the technical solution of the present utility model fall within the protection scope of the present utility model.

Claims

1. A tool for detecting the inner hole interference of a long tube of a steering gear, which is used for detecting the inner hole interference of a long tube of a steering gear. The inner holes are, from bottom to top, the tail hole, the middle hole, and the head hole. The inner diameters of the tail hole and the head hole are larger than the inner diameter of the middle hole. The tool comprises a base and a positioning rod assembly, and the positioning rod assembly is fixedly installed at the center of the base. It is characterized in that: The detection tooling also includes a detection head; The positioning rod assembly includes a positioning column, a positioning rod, and a rotating rod which are coaxial from bottom to top; the positioning column matches the tail hole, the outer diameter of the positioning rod is smaller than the inner diameter of the middle hole, and the outer diameter of the rotating rod is smaller than the outer diameter of the positioning rod; the positioning column is fixedly connected to the positioning rod, and the positioning rod is rotatably connected to the rotating rod; The detection head includes a sleeve, a rod-shaped handle on the top of the sleeve, and a plurality of detection columns on the outer wall of the sleeve; The inner diameter of the sleeve matches the outer diameter of the rotating rod; a limiting groove is symmetrically distributed on the left and right sides of the sleeve; and limiting protrusions matching the limiting grooves are provided on the left and right sides of the upper part of the rotating rod; The detection head is inserted into the head of the rotating rod, and the rotation of the detection head drives the rotating rod to rotate; the detection head is coaxial with the rotating rod; the distance from the end of the detection column to the axis of the sleeve matches one-half of the inner diameter of the head hole.

2. The tooling for detecting the inner hole interference of the long tube of the steering gear according to claim 1, characterized in that: The tail of the rotating rod extends into the head of the positioning rod, and the tail of the rotating rod is rotatably connected with the head of the positioning rod through a bearing.

3. The tooling for detecting the inner hole interference of the long tube of the steering gear according to claim 2, characterized in that: The detection column comprises a detection column body and a ball rotatably mounted on the end of the detection column body; the end of the detection column body is conical.

4. The tooling for detecting the inner hole interference of the long tube of the steering gear according to claim 3 is characterized in that: The detection columns are fixed vertically on the outer wall of the sleeve in a staggered manner on the left and right sides.

5. The tooling for detecting the inner hole interference of the long tube of the steering gear according to claim 4, characterized in that: A magnetic ring A is fixedly attached to the lower end surface of the sleeve, and a magnetic ring B fixed on the rotating rod is adsorbed below the magnetic ring A.

6. The tooling for detecting the inner hole interference of the long tube of the steering gear according to claim 5, characterized in that: A polytetrafluoroethylene plate is pasted on the upper end surface of the base.

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