Pneumatic locking mechanism for fixture

Abstract

The present invention discloses a pneumatic locking mechanism for a jig, including a mounting seat, a driving cylinder, two joints, a pushing assembly, and a resistance assembly. The resistance assembly includes an inner connecting portion, an arc-shaped resistance end connected to the inner connecting portion, a rolling disk, two limit screws, a middle pin shaft, a pre-stressed elastic member, and an external mounting cover. The arc-shaped resistance end is provided with a pin hole, and the two ends of the pre-stressed elastic member respectively resist the external mounting cover and the pre-stressed elastic member; the driving cylinder is fixedly connected to the pushing assembly and drives the pushing assembly to move, and the pushing assembly is fixedly connected to the inner connecting portion. The position of the resistance assembly is controlled by starting and stopping the driving cylinder, thereby controlling the switch of the test door during the test. The setting of the rolling disk and the arc-shaped resistance end solves the problem of easy damage due to touch. The pre-stressed elastic member provides a certain elastic force for the arc-shaped resistance end, which can both ensure compression and avoid touch damage.

Description

Technical Field

[0001] The invention relates to the field of testing, and in particular to a pneumatic locking mechanism for a jig. Background Art

[0002] At present, in the field of electronic testing, it is necessary to test and experiment the functions, power calibration, life, performance, etc. of products. However, this requires a variety of test fixtures, which can be roughly classified into three categories: manual, semi-automatic and automatic. Among them, semi-automatic test fixtures are the most widely used in the current electronic testing industry. Semi-automatic test fixtures are divided into two categories: with flip cover and without flip cover. If the product test needs to shield light and interference, and protection is required for high-voltage testing, a semi-automatic test fixture with a flip cover will be selected for testing.

[0003] However, the existing semi-automatic test fixture with flip cover has the following defects in the locking process:

[0004] In the prior art, a snap-on locking mechanism is generally used, but this locking structure needs to be opened manually and the snap is easily damaged. It is relatively difficult for operators to manually open a flip cover of a larger size. In addition, if the flip cover is not opened in time to load the next product to be tested when the test is completed, it will affect the production output value. If the operator mistakenly opens the flip cover prematurely during the test, it will cause a poor test. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a pneumatic locking mechanism for a jig, which can solve the problems of inconvenient opening and easy damage of the buckle.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] A pneumatic locking mechanism for a jig comprises a mounting seat, a driving cylinder, two joints, a pushing assembly, and a resistance assembly, wherein the resistance assembly comprises an inner connecting portion, an arc-shaped resistance end connected to the inner connecting portion, a rolling disk, two limit screws, a middle pin shaft, a preload elastic member, and an external mounting cover, wherein the arc-shaped resistance end is provided with a pin hole, the middle pin shaft is located in the pin hole, the middle pin shaft is inserted into the rolling disk, the rolling disk rolls along the middle pin shaft, the two limit screws are threadedly connected to the arc-shaped resistance end and are distributed at both ends of the middle pin shaft, and the two ends of the preload elastic member respectively resist the external mounting cover and the preload elastic member; the driving cylinder is fixed to the mounting seat, and the two joints are respectively installed at both ends of the driving cylinder, the driving cylinder is fixedly connected to the pushing assembly and drives the pushing assembly to move, and the pushing assembly is fixedly connected to the inner connecting portion.

[0008] Furthermore, the jig pneumatic locking mechanism also includes a slide rail and a slider slidably mounted on the slide rail, the slide rail is fixed to the lower part of the mounting seat, and the slider is fixedly connected to the inner connecting part.

[0009] Furthermore, the pushing assembly includes a push rod, a nut threadedly connected to the end of the push rod, and a push plate abutting against the nut.

[0010] Furthermore, the pushing assembly also includes side connecting plates distributed on both sides of the pushing plate, and the side connecting plates are fixedly connected to the inner connecting part.

[0011] Furthermore, the mounting seat is provided with a slide groove, and the inner connecting part slides along the slide groove.

[0012] Furthermore, the push rod is perpendicular to the nut.

[0013] Furthermore, there are two rolling disks, and the diameter of each rolling disk is greater than the diameter of the middle pin shaft.

[0014] Furthermore, the inner connecting portion is provided with a sliding groove matched with the rolling disk.

[0015] Furthermore, a mounting portion is provided in the middle of the driving cylinder, and the jig pneumatic locking mechanism also includes a travel switch, and the travel switch is installed on the mounting portion.

[0016] Furthermore, there are two travel switches, which are distributed at two ends of the mounting portion.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The two ends of the pre-stressed elastic member respectively abut against the external mounting cover and the pre-stressed elastic member; the driving cylinder is fixed to the mounting seat, and the two joints are respectively installed at the two ends of the driving cylinder. The driving cylinder is fixedly connected to the pushing assembly and drives the pushing assembly to move, and the pushing assembly is fixedly connected to the inner connecting part. The position of the abutting assembly is controlled by starting and stopping the driving cylinder, thereby controlling the switch of the test door during the test. The setting of the rolling disk and the arc-shaped abutting end solves the problem of easy damage due to touch. The pre-stressed elastic member provides a certain elastic force for the arc-shaped abutting end, which can both ensure compression and avoid touch damage.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a preferred embodiment of the pneumatic locking mechanism of the jig of the present invention;

[0021] Figure 2 for Figure 1 A three-dimensional diagram of the pneumatic locking mechanism of the jig shown;

[0022] Figure 3 for Figure 1 Another stereoscopic view of the pneumatic locking mechanism of the jig shown;

[0023] Figure 4 for Figure 1 Another stereoscopic view of the pneumatic locking mechanism of the jig shown;

[0024] Figure 5 for Figure 1 Another stereoscopic view of the pneumatic locking mechanism of the jig shown.

[0025] In the figure: 10, mounting seat; 20, driving cylinder; 21, mounting part; 30, joint; 40, travel switch; 50, pushing assembly; 51, push rod; 52, nut; 53, push plate; 54, side connecting plate; 60, interference assembly; 61, inner connecting part; 62, arc-shaped interference end; 621, pin hole; 63, rolling plate; 64, limit screw; 65, middle pin shaft; 66, pre-stressed elastic member; 67, external mounting cover; 70, slide rail; 80, slider. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] See also Figure 1-5 A pneumatic locking mechanism for a jig includes a mounting seat 10, a driving cylinder 20, two joints 30, a pushing assembly 50, and a resisting assembly 60. The resisting assembly 60 includes an inner connecting portion 61, an arcuate resisting end 62 connected to the inner connecting portion 61, a rolling plate 63, two limit screws 64, a middle pin 65, a preload elastic member 66, and an external mounting cover 67. The arcuate resisting end 62 is provided with a pin hole 621, the middle pin 65 is located in the pin hole 621, the middle pin 65 is plugged into the rolling plate 63, and the rolling plate 63 is moved along the pin hole 621. The middle pin 65 rolls, the two limit screws 64 are screwed to the arc-shaped abutment end 62 and distributed at the two ends of the middle pin 65, and the two ends of the pre-stressed elastic member 66 respectively abut against the external mounting cover 67 and the pre-stressed elastic member 66; the driving cylinder 20 is fixed to the mounting seat 10, and the two joints 30 are respectively installed at the two ends of the driving cylinder 20. The driving cylinder 20 is fixedly connected to the pushing assembly 50 and drives the pushing assembly 50 to move, and the pushing assembly 50 is fixedly connected to the inner connection part 61. The position of the abutment assembly 60 is controlled by starting and stopping the driving cylinder 20, thereby controlling the switch of the test door during the test. The setting of the rolling disk 63 and the arc-shaped abutment end 62 solves the problem of easy damage due to touch. The pre-stressed elastic member 66 provides a certain elastic force for the arc-shaped abutment end 62, which can both ensure compression and avoid touch damage.

[0030] In a specific application process, the pre-stressed elastic member 66 is a spring. When in a locked state, the end of the inner connecting part 61 contacts the test door. When the driving cylinder 20 is cut off from air, the pre-stressed elastic member 66 can continue to ensure the contact effect of the inner connecting part 61 to prevent the test door from being opened when the air is cut off.

[0031] Preferably, the jig pneumatic locking mechanism further comprises a slide rail 70, a slider 80 slidably mounted on the slide rail 70, the slide rail 70 is fixed to the lower portion of the mounting seat 10, and the slider 80 is fixedly connected to the inner connecting portion 61. The pushing assembly 50 comprises a push rod 51, a nut 52 threadedly connected to the end of the push rod 51, and a push plate 53 abutting against the nut 52, and is easy to install and has strong applicability.

[0032] Preferably, the pushing assembly 50 further includes side connecting plates 54 distributed on both sides of the push plate 53, and the side connecting plates 54 are fixedly connected to the inner connecting portion 61. The mounting seat 10 is provided with a slide groove, and the inner connecting portion 61 slides along the slide groove. The push rod 51 is perpendicular to the nut 52, which improves the accuracy of the entire movement.

[0033] Preferably, there are two rolling discs 63, and the diameter of the rolling disc 63 is larger than the diameter of the middle pin 65. The inner connecting portion 61 is provided with a sliding groove matched with the rolling disc 63, which improves the stability of the interference process.

[0034] Preferably, a mounting portion 21 is provided in the middle of the driving cylinder 20, and the jig pneumatic locking mechanism further includes a travel switch 40, and the travel switch 40 is installed on the mounting portion 21. There are two travel switches 40, which are distributed at both ends of the mounting portion 21, with novel structure, ingenious design, strong applicability, and easy promotion.

[0035] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pneumatic locking mechanism for a fixture, comprising a mounting seat, a driving cylinder, two joints, a pushing component, and a resisting component, characterized in that: The abutment assembly comprises an inner connection part, an arc-shaped abutment end connected with the inner connection part, a rolling plate, two limit screws, a middle pin shaft, a preload elastic member, and an external mounting cover, wherein the arc-shaped abutment end is provided with a pin hole, the middle pin shaft is located in the pin hole, the middle pin shaft is plugged into the rolling plate, the rolling plate rolls along the middle pin shaft, the two limit screws are screwed to the arc-shaped abutment end and distributed at both ends of the middle pin shaft, and the two ends of the preload elastic member respectively abut against the external mounting cover and the preload elastic member; The driving cylinder is fixed to the mounting seat, the two joints are respectively installed at both ends of the driving cylinder, the driving cylinder is fixedly connected to the pushing component and drives the pushing component to move, and the pushing component is fixedly connected to the inner connecting part.

2. The pneumatic locking mechanism for a jig according to claim 1, characterized in that: The jig pneumatic locking mechanism also includes a slide rail and a slider slidably mounted on the slide rail. The slide rail is fixed to the lower part of the mounting seat, and the slider is fixedly connected to the inner connecting part.

3. The pneumatic locking mechanism for a jig according to claim 1, characterized in that: The pushing assembly comprises a push rod, a nut threadedly connected to the end of the push rod, and a push plate abutting against the nut.

4. The pneumatic locking mechanism for a jig according to claim 3, characterized in that: The pushing assembly further comprises side connecting plates distributed on both sides of the pushing plate, and the side connecting plates are fixedly connected to the inner connecting part.

5. The pneumatic locking mechanism for a jig according to claim 4, characterized in that: The mounting seat is provided with a slide groove, and the inner connecting part slides along the slide groove.

6. The pneumatic locking mechanism for a jig according to claim 3, characterized in that: The push rod is perpendicular to the nut.

7. The pneumatic locking mechanism for a jig according to claim 1, characterized in that: The number of the rolling disks is two, and the diameter of the rolling disk is greater than the diameter of the middle pin shaft.

8. The pneumatic locking mechanism for a jig according to claim 7, characterized in that: The inner connecting portion is provided with a sliding groove matched with the rolling plate.

9. The pneumatic locking mechanism for a jig according to claim 1, characterized in that: A mounting portion is provided in the middle of the driving cylinder, and the jig pneumatic locking mechanism further comprises a travel switch, which is mounted on the mounting portion.

10. The pneumatic locking mechanism for a jig according to claim 9, characterized in that: The number of the travel switches is two, and the two travel switches are distributed at two ends of the mounting portion.

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