Rotary type automatic rebound clamping device

Abstract

The utility model discloses a rotary type automatic rebound clamping device which comprises a fixed shell, a rotating shaft, a ratchet wheel structure, a reset spring structure, a bidirectional reciprocating driving structure, a support and a movable jaw, and the rotating shaft is rotatably arranged on the fixed shell; the mounting end of the ratchet wheel structure is arranged on the fixed shell, and the rotating shaft is sleeved with the reset spring structure. The driving end of the bidirectional reciprocating driving structure is coaxially connected with the rotating shaft; the two supports are arranged at the two reciprocating ends of the two-way reciprocating driving structure correspondingly, and the two supports are arranged on the fixed shell in a sliding mode correspondingly. The two movable jaws are arranged on the two supports respectively and extend out of the fixed shell. According to the utility model, the whole operation is simpler and more convenient, the adaptive range is wider, and the service life is longer.

Description

Technical Field

[0001] The utility model relates to the technical field of sample clamping, in particular to a rotary automatic rebound clamping device. Background Art

[0002] In current industrial production and experimental research, clamping devices play a vital role, especially in scenarios where experimental samples need to be precisely fixed and positioned.

[0003] The existing method of clamping experimental samples is mostly to clamp by manually tightening the screws. For example, a sample clamping device for a friction and wear testing machine with application number CN202322546945.0 is disclosed. By manually rotating the handle, the two sets of tightening screws are pushed toward each other, and the distance between the two sets of sliders 3 is adjusted to be equivalent to the width of the sample. The test block is placed between the two sets of sliders 3, and the stepped platform 4 supports the test block. The handle is turned again to continue to adjust the distance between the two sets of sliders until the test block is clamped.

[0004] However, the above patent still has some problems in actual use, such as: it is cumbersome to use, complicated to operate, and when clamping the experimental sample, the size positioning is inaccurate, and the sample is easy to shift during the clamping process. In addition, the smoke generated during the experimental use process will directly affect the entire device, which is easy to be damaged and has a short service life. Summary of the invention

[0005] The utility model aims to solve one of the technical problems in the above-mentioned technology at least to a certain extent.

[0006] To achieve the above-mentioned purpose, the first aspect of the utility model proposes a rotary automatic rebound clamping device, comprising: a fixed shell, a rotating shaft, a ratchet structure, a reset spring structure, a two-way reciprocating drive structure, a bracket and a movable jaw, wherein the rotating shaft is rotatably arranged on the fixed shell; the mounting end of the ratchet structure is arranged on the fixed shell to limit the rotation direction of the rotating shaft; the reset spring structure is sleeved on the rotating shaft to reset the rotating shaft; the driving end of the two-way reciprocating drive structure is coaxially connected to the rotating shaft; the two brackets are respectively arranged on the two reciprocating ends of the two-way reciprocating drive structure, and the two brackets are respectively slidably arranged on the fixed shell; the two movable jaws are respectively arranged on the two brackets and extend out of the fixed shell.

[0007] In addition, the rotary automatic rebound clamping device proposed in the utility model may also have the following additional technical features:

[0008] As a further description of the above technical solution: the ratchet structure includes a ratchet, a pawl and a traction spring, wherein the ratchet is arranged on the rotating shaft; the pawl is rotatably arranged on the fixed shell; one end of the traction spring is arranged on the fixed shell through a column, and the other end is connected to the pawl so that the pawl abuts against the ratchet.

[0009] As a further description of the above technical solution: the return spring structure includes a spring box, a spiral spring and a spring cover, wherein the spring box is fixed in the fixed shell; the spiral spring is arranged in the spring box; the spring cover covers the spring box; wherein the rotating shaft passes through the spring cover and the spring box, and one end of the spiral spring is connected to the rotating shaft, and the other end is connected to the spring box.

[0010] As a further description of the above technical solution: the bidirectional reciprocating drive structure includes a crank and a drive arm, wherein the center of the crank is arranged on the rotating shaft; the two drive arms are pivotally connected to the two ends of the crank respectively; wherein the two brackets are pivotally connected to the ends of the two drive arms respectively.

[0011] As a further description of the above technical solution: a guide rail is fixed in the fixed shell through a guide rail frame, and a guide rail slider is connected to the two brackets respectively, and the two guide rail sliders are slidably arranged on the guide rail.

[0012] As a further description of the above technical solution: the clamping ends of the two movable jaws are respectively provided with pressing sheets, which can better clamp the experimental sample.

[0013] As a further description of the above technical solution: a sample positioning frame is provided on one of the movable jaws to facilitate the placement of the experimental sample.

[0014] As a further description of the above technical solution: a handwheel is provided at the end of the rotating shaft, and relevant staff can rotate the rotating shaft by turning the handwheel, and the rotating shaft is rotatably connected to the fixed shell through a bearing seat, thereby reducing the friction of the rotating shaft movement and accurately positioning the rotating shaft, so that the rotating shaft can run more smoothly.

[0015] As a further description of the above technical solution: a slide groove is provided on the fixed shell, and the movable jaw is connected to the bracket and extends outward after passing through the slide groove to further reduce the impact of smoke on the components in the fixed shell.

[0016] According to the rotary automatic rebound clamping device of the utility model, the overall operation is simpler, and only the rotating shaft needs to be rotated, and after the experimental sample is installed, the movable jaw can reset itself through the force of the reset spring structure to achieve the clamping of the experimental sample; through the cooperation of the rotating shaft and the ratchet structure, the movable jaw can stay at any position, which can be suitable for samples of various specifications; the movable jaw extends outward, and the smoke generated during sample experiments will not affect the core linkage components of the device, thereby extending the service life of the device; in addition, a pressing piece and a sample positioning frame are installed at the movable jaw position, making sample installation more convenient and accurate.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram of the front view of the structure of a rotary automatic rebound clamping device according to an embodiment of the utility model;

[0020] Figure 2 It is a schematic AA cross-sectional structure diagram of a rotary automatic rebound clamping device according to an embodiment of the utility model;

[0021] Figure 3 It is a top view of the structure of a rotary automatic rebound clamping device according to an embodiment of the utility model;

[0022] Figure 4 It is a bottom view structural schematic diagram of a rotary automatic rebound clamping device according to an embodiment of the utility model;

[0023] As shown in the figure:

[0024] 100, fixed housing; 200, rotating shaft; 201, hand wheel; 202, bearing seat; 300, ratchet structure; 310, ratchet; 320, pawl; 330, traction spring; 400, reset spring structure; 410, spring box; 420, scroll spring; 430, spring cover; 500, two-way reciprocating drive structure; 510, crank; 520, drive arm; 600, bracket; 601, guide rail; 602, guide rail slider; 700, movable jaw; 701, pressing piece; 702, sample positioning frame. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The rotary automatic rebound clamping device according to the embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 4 As shown, the rotary automatic rebound clamping device of the embodiment of the utility model has the advantages of simple operation, precise positioning, high adaptability and long service life.

[0028] A specimen clamping device for a friction and wear testing machine with application number CN202322546945.0 (hereinafter referred to as "the patent") includes a supporting outer frame, which is installed on the storage table of the friction and wear testing machine by screws. A clamping assembly is provided in the supporting outer frame, and the clamping assembly includes two groups of sliders. A stepped platform is provided on the top of the slider, a sliding rod is provided in the supporting outer frame, a through hole is provided on the slider for cooperating with the sliding rod, and threaded holes are provided at both ends of the supporting outer frame for cooperating with the tightening screw. One end of the tightening screw is tightened on one side of the slider, and a handle is provided at the other end.

[0029] When clamping the experimental sample, this patent requires turning the handle, pushing the two sets of tightening screws toward each other, adjusting the distance between the two sets of slide blocks to make it equal to the width of the sample, placing the test block between the two sets of slide blocks, and supporting the test block with a stepped platform. Turning the handle again, continue to adjust the distance between the two sets of slide blocks until the test block is clamped. This process requires multiple rotations of the two sets of handles, and the entire operation process is rather cumbersome.

[0030] The rotary automatic rebound clamping device of the utility model, when not in use, the force of the reset spring structure 400 always keeps the entire device in a clamped state (that is, the two movable jaws 700 are in a state of being close to each other). When clamping the experimental sample, the two reciprocating ends of the two-way reciprocating drive structure 500 can drive the two brackets 600 to move away from each other by rotating the rotating shaft 200 (that is, the rotation of the rotating shaft 200 drives the crank 510 to rotate, and the two ends of the crank 510 respectively drive the two driving arms 520 to move, and the driving arm 520 drives the bracket 600 connected thereto to move, so that the guide rail slider 602 on the bracket 600 moves on the guide rail 601, thereby In order to realize the conversion of circular motion into linear motion), the two brackets 600 drive the movable jaws 700 connected thereto to move until the two movable jaws 700 are opened to a suitable position. In addition, due to the limiting effect of the ratchet structure 300, the opening position can be maintained. At this time, the experimental sample is placed on the two movable jaws 700, specifically, the experimental sample can be placed on the sample positioning frame 702, and then the pawl 320 is moved so that the ratchet 310 is no longer limited. At this time, the reset effect of the volute spring 420 drives the rotating shaft 200 to reset and rotate, and the two movable jaws 700 are driven by the two-way reciprocating drive structure 500 to perform the final clamping action on the experimental sample.

[0031] The entire operation only requires a single rotation of the rotating shaft 200, which is more convenient and quick. When the ratchet structure 300 is limited, the rotating shaft 200 can be made irreversible in its rotation, which not only ensures the safety of the device, but also allows the movable jaw 700 to stay at any position, and is suitable for samples of multiple specifications.

[0032] This patent requires manual operation to clamp the experimental sample, that is, the rotation of two tightening screws to make the two sliders approach each other to achieve the final clamping of the experimental sample. However, since the two tightening screws need to be rotated separately, the accuracy of the final clamping position of the experimental sample will be limited due to errors in manual operation.

[0033] In the rotary automatic rebound clamping device of the present invention, since the center of the crank 510 is coaxially arranged with the rotating shaft 200, when the crank 510 rotates, the driving arms 520 connected at both ends can move synchronously, so that the two brackets 600 respectively drive the movable jaws 700 to move closer or farther synchronously, so that the final clamping position of the experimental sample is more accurate.

[0034] In actual use of this patent, since the experimental sample is located between two sliders and is slidably arranged in a supporting outer frame, when the experimental sample is conducting an experiment, the smoke and other gases generated will affect the entire device, causing the service life of the device to be shortened.

[0035] The rotary automatic rebound clamping device of the utility model connects the movable jaw 700 with the bracket 600 and extends it outward. Therefore, when clamping the experimental sample, it can be away from the reset spring structure 400 and the two-way reciprocating drive structure 500. In addition, due to the shielding effect of the fixed shell 100, the intrusion of smoke can also be reduced, thereby increasing the service life of the core components.

[0036] In addition, the rotary automatic rebound clamping device of the utility model has a sophisticated design, a wide range of applications, adapts to a variety of environments, and has few limitations.

[0037] In summary, according to the rotary automatic rebound clamping device of the embodiment of the utility model, the overall operation is simpler. It only needs to rotate the rotating shaft 200, and after the experimental sample is installed, the movable jaw 700 can reset itself through the force of the reset spring structure 400 to achieve clamping of the sample; through the cooperation of the rotating shaft 200 and the ratchet structure 300, the movable jaw 700 can stay at any position, which can be suitable for samples of multiple specifications; the movable jaw 700 extends outward, and when clamping the sample for the experiment, the smoke generated will not affect the core linkage components of the device, thereby extending the service life of the device; in addition, a pressing plate 701 and a sample positioning frame 702 are installed at the position of the movable jaw 700, making the sample installation more convenient and accurate.

[0038] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A rotary automatic rebound clamping device, characterized in that: include: A fixed housing (100), a rotating shaft (200), a ratchet structure (300), a reset spring structure (400), a bidirectional reciprocating drive structure (500), a bracket (600) and a movable jaw (700), wherein the rotating shaft (200) is rotatably arranged on the fixed housing (100); the mounting end of the ratchet structure (300) is arranged on the fixed housing (100) to limit the rotation direction of the rotating shaft (200); the reset spring structure (400) is sleeved on the rotating shaft (200) and the reset spring structure (400) is sleeved on the rotating shaft (200). The two-way reciprocating drive structure (500) is disposed on the two reciprocating ends of the two-way reciprocating drive structure (500) to reset the rotating shaft (200); the driving end of the two-way reciprocating drive structure (500) is coaxially connected to the rotating shaft (200); the two brackets (600) are respectively disposed on the two reciprocating ends of the two-way reciprocating drive structure (500), and the two brackets (600) are respectively slidably disposed in the fixed housing (100); the two movable jaws (700) are respectively disposed on the two brackets (600) and extend out of the fixed housing (100).

2. The rotary automatic rebound clamping device according to claim 1, characterized in that: The ratchet structure (300) comprises a ratchet (310), a pawl (320) and a traction spring (330), wherein the ratchet (310) is arranged on the rotating shaft (200); the pawl (320) is rotatably arranged on the fixed housing (100); one end of the traction spring (330) is arranged on the fixed housing (100) via a column, and the other end is connected to the pawl (320) so that the pawl (320) abuts against the ratchet (310).

3. The rotary automatic rebound clamping device according to claim 1, characterized in that: The return spring structure (400) comprises a spring box (410), a spiral spring (420) and a spring cover (430), wherein the spring box (410) is fixed in the fixed housing (100); the spiral spring (420) is arranged in the spring box (410); and the spring cover (430) covers the spring box (410); wherein the rotating shaft (200) passes through the spring cover (430) and the spring box (410), and one end of the spiral spring (420) is connected to the rotating shaft (200), and the other end is connected to the spring box (410).

4. The rotary automatic rebound clamping device according to claim 1, characterized in that: The bidirectional reciprocating drive structure (500) comprises a crank (510) and a drive arm (520), wherein the center of the crank (510) is arranged on the rotating shaft (200); the two drive arms (520) are respectively pivotally connected to two ends of the crank (510); and the two brackets (600) are respectively pivotally connected to the ends of the two drive arms (520).

5. The rotary automatic rebound clamping device according to claim 1, characterized in that: A guide rail (601) is fixed in the fixed housing (100) via a guide rail frame, and guide rail sliders (602) are respectively connected to the two brackets (600), and the two guide rail sliders (602) are respectively slidably arranged on the guide rail (601).

6. The rotary automatic rebound clamping device according to claim 1, characterized in that: Pressing sheets (701) are respectively arranged on the clamping ends of the two movable jaws (700).

7. The rotary automatic rebound clamping device according to claim 1, characterized in that: A sample positioning frame (702) is provided on one of the movable jaws (700).

8. The rotary automatic rebound clamping device according to claim 1, characterized in that: A hand wheel (201) is provided at the end of the rotating shaft (200), and the rotating shaft (200) is rotatably connected to the fixed housing (100) via a bearing seat (202).

9. The rotary automatic rebound clamping device according to claim 1, characterized in that: A sliding groove is provided on the fixed housing (100), and the movable jaw (700) is connected to the bracket (600) and extends outward after passing through the sliding groove.

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