CN211178980U

CN211178980U - Traction force test pull rod structure

Info

Publication number: CN211178980U
Application number: CN201921753966.7U
Authority: CN
Inventors: 赵向前; 徐星仁; 石子杏; 曾悦
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-08-04
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a traction force test pull rod structure, which relates to the field of test tools and comprises a front pull rod (1), a sleeve (2), a buffer (3), a tension sensor (4) and a rear pull rod (5); a pipe cavity with a closed front end and an open rear end is arranged in the middle of the sleeve (2) along the length direction, and the end part of the front end of the sleeve (2) is fixedly connected with the front pull rod (1); the front end of the buffer (3) is fixedly connected with the bottom surface of the closed end of the tube cavity of the sleeve (2), the rear end of the buffer is connected with the front end of a rear pull rod (5) through the tension sensor (4), and the rear end of the rear pull rod (5) extends out of the opening end of the tube cavity of the sleeve (2). The utility model discloses under the assurance test security condition, reach the effect that improves the measuring accuracy simultaneously.

Description

Traction force test pull rod structure

Technical Field

The utility model relates to a test fixture technical field especially relates to a traction force test pull rod structure.

Background

The whole vehicle traction force is used as an important index of the dynamic test, a load trailer method is required to be used for testing, and meanwhile, the method is also required to be used for testing the whole vehicle thermal balance test. The load trailer method needs to be connected with a tested vehicle and a trailer, and the reliability of the connecting tool is very important to test safety.

The main form of connecting frock is drawn at present has: 1. connecting a test vehicle by using a steel wire rope; 2. the vehicle was tested using a steel axle connection.

The tooling has the following defects respectively: 1. the steel wire rope is used for connecting a test vehicle, and the danger coefficient is higher when the steel wire rope is suddenly unloaded due to elasticity of the steel wire rope. Rotation can occur in the traction process, the fixing reliability of the tension sensor is influenced, and the steel wire rope is easy to bend in the test process, so that the test precision is influenced; 2. the steel shaft is used for connecting a test vehicle and is rigidly connected, the speed of the vehicle to be tested and the speed of the trailer are required to be controlled to be completely consistent, otherwise, the phenomena of impact and collision can occur, and the test safety is influenced.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a traction force test pull rod structure is guaranteeing under the test security condition, reaches the effect that improves the measuring accuracy simultaneously.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a traction test pull rod structure comprises a front pull rod, a sleeve, a buffer, a tension sensor and a rear pull rod; a pipe cavity with a closed front end and an open rear end is arranged in the middle of the sleeve along the length direction, and the end part of the front end of the sleeve is fixedly connected with the front pull rod; the front end of the buffer is fixedly connected with the bottom surface of the closed end of the tube cavity of the sleeve, the rear end of the buffer is connected with the front end of the rear pull rod through the tension sensor, and the rear end of the rear pull rod extends out of the open end of the tube cavity of the sleeve.

Furthermore, the device also comprises a sliding bearing fixed at the opening end of the tube cavity of the sleeve, and the inner side surface of the sliding bearing is sleeved on the outer side surface of the rear pull rod.

Further, the central axes of the front pull rod, the sleeve, the buffer, the tension sensor, the sliding bearing and the rear pull rod are positioned on a straight line.

Further, the middle part of the sleeve is provided with an installation window along the length direction.

Furthermore, two ends of the tension sensor are respectively connected with the rear end of the buffer and the front end of the rear pull rod through fixing pins.

Furthermore, pin holes are respectively formed in the front end of the front pull rod and the rear end of the rear pull rod.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the buffer is connected with the tension sensor, so that impact caused by inconsistent traction and vehicle speed is avoided, and the test safety is improved;

2. the nested structure of the buffer, the tension sensor, the rear pull rod, the sleeve and the sliding bearing can effectively avoid the buffer and the rear pull rod from shaking in the traction process, and ensure the stability of connection of the two ends of the tension sensor, thereby improving the test precision;

3. by using the nested structure, the axes of the front pull rod, the sleeve, the buffer, the tension sensor, the sliding bearing and the rear pull rod are kept on the same line, so that the influence of the tension sensor on bending moment is avoided, and the testing precision is further improved;

4. the tension sensor is respectively connected with the buffer and the rear pull rod through the fixing pin, and the middle part of the sleeve is provided with an installation window for assembling and disassembling the tension sensor, so that the sensor can be conveniently replaced to adapt to different measuring range requirements;

5. the two ends of the pull rod structure are pin holes, the pull rod structure can be directly connected with a traction point of a whole vehicle by using a fixing pin or directly placed into a traction hook of the whole vehicle, and the connection mode is simple and reliable.

Drawings

Fig. 1 is a schematic view of the structure of the pull rod of the present invention.

In the figure, 1-front pull rod, 2-sleeve, 3-buffer, 4-tension sensor, 5-rear pull rod, 6-sliding bearing, 7-installation window, 8-fixed pin and 9-pin hole.

Detailed Description

In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.

As shown in fig. 1, the utility model provides a traction test pull rod structure,

including preceding pull rod 1, sleeve pipe 2, buffer 3, force sensor 4,

back pull rod

5, 2 middle parts of sleeve pipe set up the front end and seal rear end open-ended lumen along length direction, the tip and the 1 fixed connection of preceding pull rod of sleeve pipe front end, 3 front ends of buffer with 2 lumen blind end bottom surface fixed connection of sleeve pipe, the impact that arouses when can avoiding pulling and the speed of a motor vehicle inconsistent improves the test security, 3 rear ends of buffer pass through 5 front ends of back pull rod are connected to force sensor 4, 5 rear ends of back pull rod stretch out the open end of 2 lumens of sleeve pipe. When the traction force testing device is used, a load trailer and a tested vehicle are respectively connected with the front pull rod 1 and the rear pull rod 5 of the traction force testing pull rod structure, in the traction force testing process, the sleeve 2 receives the tension of the load trailer transmitted by the front pull rod 1 (the tension reflects the traction between the tested vehicle and the load trailer) and transmits the tension to the tension sensor 4, the tension sensor 4 transmits the tension to the rear pull rod 6 and acts on the tested vehicle, and therefore the tension sensor 4 can collect traction force data generated in the testing process when the tested vehicle pulls the load trailer.

In order to avoid relative radial shaking between the rear pull rod 5 and the sleeve 2 in the traction process, the stability of connection of the two ends of the tension sensor 4 is ensured, and the test precision is improved, the rear pull rod 5 and the sleeve 2 are provided with a certain fit clearance.

For further avoiding drawing the process kind relative radial rocking between back pull rod 5 and the sleeve pipe 2 guarantees the stability that tension sensor 4 both ends are connected improves the measuring accuracy 2 the fixed slide bearing 6 that sets up of sleeve pipe 2 lumen open end, 6 medial surface covers of slide bearing are established the lateral surface of back pull rod 5 can also reduce simultaneously friction loss and surface wear between back pull rod 5 and the sleeve pipe 2. Like this, buffer 3, force sensor 4, back pull rod 5 and sleeve pipe 2 and slide bearing 6 form nested formula structure, can effectively avoid rocking of buffer 3 and back connecting rod 6 in the traction process, guarantee the stability that force sensor 4 both ends are connected to improve the measuring accuracy.

Preferably, the central axes of the front pull rod 1, the sleeve 2, the buffer 3, the tension sensor 4, the sliding bearing 6 and the rear pull rod 5 are kept to be positioned on the same straight line, so that the tension sensor 4 can be prevented from being influenced by bending moment, and the testing precision is further improved.

Preferably, the two ends of the tension sensor 4 are respectively connected with the rear end of the buffer 3 and the front end of the rear pull rod 5 through the fixing pins 8, the installation window 7 is arranged in the middle of the sleeve 2 along the length direction, the installation window 7 is convenient to install and detach in a size matching mode, the tension sensor 4 is convenient to assemble, disassemble and replace, and different test range requirements can be met.

In this embodiment, the pinhole 9 is set up respectively to preceding pull rod 1 front end and the 6 rear ends of back pull rod, and traction force test pull rod structure can be directly used the fixed pin with the traction point of load trailer and vehicle under test to be connected or directly put into the towing pintle of load trailer and vehicle under test, and the connected mode is simple reliable.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A traction test pull rod structure is characterized in that: comprises a front pull rod (1), a sleeve (2), a buffer (3), a tension sensor (4) and a rear pull rod (5); a pipe cavity with a closed front end and an open rear end is arranged in the middle of the sleeve (2) along the length direction, and the end part of the front end of the sleeve (2) is fixedly connected with the front pull rod (1); the front end of the buffer (3) is fixedly connected with the bottom surface of the closed end of the tube cavity of the sleeve (2), the rear end of the buffer is connected with the front end of a rear pull rod (5) through the tension sensor (4), and the rear end of the rear pull rod (5) extends out of the opening end of the tube cavity of the sleeve (2).

2. The draft test pull bar construction of claim 1, wherein: still including fixing slide bearing (6) at sleeve pipe (2) lumen open end, slide bearing (6) medial surface cover is established the lateral surface of back pull rod (5).

3. The draft test drawbar arrangement according to claim 2, wherein: the central axes of the front pull rod (1), the sleeve (2), the buffer (3), the tension sensor (4), the sliding bearing (6) and the rear pull rod (5) are positioned on the same straight line.

4. The draft test pull bar construction of claim 1, wherein: and the middle part of the sleeve (2) is provided with an installation window (7) along the length direction.

5. The draft test pull bar construction of claim 1, wherein: two ends of the tension sensor (4) are respectively connected with the rear end of the buffer (3) and the front end of the rear pull rod (5) through fixing pins (8).

6. The draft test pull bar construction of claim 1, wherein: the front end of the front pull rod (1) and the rear end of the rear pull rod (5) are respectively provided with a pin hole (9).