CN209820944U - Crank pin destructive tension test device - Google Patents
Crank pin destructive tension test device Download PDFInfo
- Publication number
- CN209820944U CN209820944U CN201920525457.2U CN201920525457U CN209820944U CN 209820944 U CN209820944 U CN 209820944U CN 201920525457 U CN201920525457 U CN 201920525457U CN 209820944 U CN209820944 U CN 209820944U
- Authority
- CN
- China
- Prior art keywords
- crank pin
- tensile
- chuck
- machine
- test device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a crank pin destroys tensile test device, owing to adopt the processing technology of tensile pole below processing barb, the tensile pole is connected with the chuck under the tensile machine, and the chuck is pulled back downwards under the tensile machine, and the tensile pole is more tight more than pulling, often drops when having solved preceding experiment, reinstallate the problem. The time is saved, and meanwhile, the downward pulling speed of the lower chuck of the tensile machine is ensured not to exceed 15mm/min, and the tensile force is not less than 9.8KN, so that the crank pin is free from damage. The structure and the processing technology of the clamp are simplified, the cost is reduced, and the measurement precision is improved.
Description
Technical Field
The utility model relates to an electric bicycle field.
Background
The electric bicycle is a common tool for riding instead of walk when people go out, and is popular among people due to the fact that the electric bicycle is light, flexible and labor-saving to ride. The electric bicycle must have good quality and safety performance, and relevant standards are promulgated for ensuring the quality, safety and effective use of the electric bicycle, and performance requirements and detection test methods of various electric bicycles and various parts are specified in the relevant standards.
A crank pin breaking tension test device is designed according to the crank pin breaking tension test requirement of strength 5.4.3 of QB/T1885-1993 light industry Standard of the people's republic of China. According to the standard regulation: the downward pulling speed of the chuck under the tensile machine must not exceed 15mm/min, and the pulling force is less than or equal to 9.8KN of the crank pin without damage.
The existing crank pin breaking tension test device is heavy in structure, complex in operation, poor in manufacturability, high in cost and difficult to manufacture, and the crank pin breaking tension test device often falls off during testing.
Disclosure of Invention
The utility model aims to solve the technical problem that a crank pin destroys tensile test device is provided, overcomes the not enough of test devices such as current crank pin often drops, simplifies the structure and the processing technology, the reduce cost of anchor clamps simultaneously, improves measuring precision.
In order to solve the technical problem, the utility model discloses a scheme is: a crank pin breaking tension test device comprises an upper chuck of a tension machine, a crank pin, a sleeve, a wedge block, a tension rod, a lower chuck of the tension machine and barbs; the crank pin is connected with the upper chuck of the tensile machine; the sleeve is connected with the wedge-shaped block; the wedge-shaped block is connected with the crank pin; the sleeve is connected with the tension rod; the tension rod is connected with the lower chuck of the tension machine. The processing barb of pulling force pole below, the chuck pulls more and more tight behind the pulling force machine down pulling.
The beneficial effects of the utility model are that, owing to adopt the processing technology of tension bar below processing barb, the chuck is connected under tension bar and the tension machine, and the chuck is pulling the back downwards under the tension machine, and the tension bar is more tight more that draws, has solved before often droing when experimental, reinstallate the problem. The time is saved, and meanwhile, the downward pulling speed of the lower chuck of the tensile machine is ensured not to exceed 15mm/min, and the tensile force is not less than 9.8KN, so that the crank pin is free from damage.
Drawings
1. Fig. 1 is a front view of a crank pin breaking tension test apparatus.
In the figure:
1. an upper chuck of a tensile machine, 2 crank pins, 3 sleeves, 4 wedge-shaped blocks, 5 tensile rods, 6 lower chucks of the tensile machine,
7 barbs.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and detailed description:
as shown in figure 1, the crank pin breaking tension test device comprises an upper chuck (1) of a tension machine, a crank pin (2), a sleeve (3), a wedge-shaped block (4), a tension rod (5), a lower chuck (6) of the tension machine and barbs (7); the crank pin (2) is connected with the upper chuck (1) of the tensile machine; the sleeve (3) is connected with the wedge block (4); the wedge-shaped block (4) is connected with the crank pin (2); the sleeve (3) is connected with the tension rod (5); the tension rod (5) is connected with a lower chuck (6) of the tensile machine. The processing barb (7) of tensile pole (5) below, chuck (6) are more drawing tighter after pulling down under the tensile machine.
Fixedly connecting the upper part of the crank pin (2) with an upper chuck (1) of a tensile machine; connecting the lower part of the crank pin (1) with a wedge-shaped block (4); connecting the wedge block (4) with the sleeve (3); the upper part of the tension rod (5) is connected with the sleeve (3) by screw thread; connecting a lower chuck (6) of the tensile machine with an agnail (7) of a tension rod (5); when the lower chuck (6) of the tensile machine pulls downwards at a speed less than 15 mm/min; when the pulling force is larger than or equal to 9.8KN, the pulling force rod (5) does not fall off, and the crank pin (2) is not damaged. Meets the design requirement of crank pin breaking tension test 5.4.3 of QB/T1885-1993 light industry Standard of the people's republic of China.
Claims (2)
1. The utility model provides a crank pin destroys tensile test device which characterized by: the device comprises an upper chuck of a tensile machine, a crank pin, a sleeve, a wedge block, a tensile rod, a lower chuck of the tensile machine and barbs; the crank pin is connected with the upper chuck of the tensile machine; the sleeve is connected with the wedge-shaped block; the wedge-shaped block is connected with the crank pin; the sleeve is connected with the tension rod; the tension rod is connected with the lower chuck of the tension machine.
2. A crank pin breaking tension test device as claimed in claim 1, characterized in that: the processing barb of pulling force pole below, the chuck pulls more and more tight behind the pulling force machine down pulling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920525457.2U CN209820944U (en) | 2019-04-18 | 2019-04-18 | Crank pin destructive tension test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920525457.2U CN209820944U (en) | 2019-04-18 | 2019-04-18 | Crank pin destructive tension test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209820944U true CN209820944U (en) | 2019-12-20 |
Family
ID=68880461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920525457.2U Expired - Fee Related CN209820944U (en) | 2019-04-18 | 2019-04-18 | Crank pin destructive tension test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209820944U (en) |
-
2019
- 2019-04-18 CN CN201920525457.2U patent/CN209820944U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 Termination date: 20200418 |