Self-locking mechanism for pneumatic vice
By designing a self-locking mechanism for pneumatic vise, the self-locking effect is achieved by using the inclined structure of the pressing block and the fixed block, the problems of unstable clamping of the traditional pneumatic vise and the high cost and large volume are solved, and the stability and reliability of the self-locking function are achieved.
Patent Information
- Application Number
- CN202420771167.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Traditional pneumatic vises have problems such as unstable clamping, easy to fall off and shake during use. The existing self-locking mechanism is costly, large in size or unstable in self-locking function.
A self-locking mechanism for pneumatic vise is designed, including a push plate, a pressing block, a pushing device, a fixing block and a thrust ball bearing, and is closed and pressed with a second inclined surface of the pressing block to form a self-locking effect.
The self-locking mechanism is small in size, low in cost, easy to control and stable in self-locking functions, ensuring the reliability and safety of the pneumatic vise, as well as the accuracy and quality of the machining workpiece.
Smart Images
Figure CN222661356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pneumatic vises, in particular to a self-locking mechanism for pneumatic vises. Background Art
[0002] Pneumatic vises, also known as pneumatic bench vises, are commonly used clamping tools in industrial production and are widely used in the fields of automobiles, machinery, electronics, etc. When traditional pneumatic vises are used to clamp workpieces for processing, due to unstable air pressure or external force, there are problems such as unstable clamping, easy falling off, and shaking, which seriously affect the product quality. Therefore, a self-locking mechanism is used to solve the problems of unstable clamping, easy falling off, and shaking. However, the existing self-locking mechanisms include pneumatic, hydraulic, electromagnetic and other designs, which have high costs, large sizes or unstable self-locking functions. Summary of the invention
[0003] The purpose of the utility model is to provide a self-locking mechanism for a pneumatic vise to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions:
[0004] A self-locking mechanism for a pneumatic vise, the self-locking mechanism is used to act on a screw rod, the screw rod is provided with a step, the self-locking mechanism includes a push plate, a clamping block, a pushing device, a fixed block and a thrust ball bearing, one side of the push plate is connected to the clamping block, the other side of the push plate is connected to the pushing device, the clamping block is provided with a first inclined surface, the fixed block is provided with a second inclined surface, the first inclined surface is in contact with the second inclined surface, the thrust ball bearing can move to the step and contact the step, wherein when the clamping block moves, the first inclined surface slides along the second inclined surface to push the fixed block to move toward the thrust ball bearing, the angle between the first inclined surface and the moving direction of the push plate is θ, θ<arctanμ, μ is the friction coefficient.
[0005] Furthermore, the push plate is located on the side of the screw rod and moves toward the side of the screw rod, and the clamping block is provided with a first movable avoidance hole, which is used to enable the clamping block to move away from the interference of the screw rod; the fixed block is provided with a second movable avoidance hole, which is used to enable the fixed block to move away from the interference of the screw rod, and the screw rod passes through the second movable avoidance hole and the first movable avoidance hole in turn.
[0006] Furthermore, the pushing device includes an electric push rod and a connecting rod seat, the electric push rod is provided with a latch hole, the connecting rod seat is hingedly connected to the electric push rod through a latch, and the connecting rod seat is bolted to the push plate.
[0007] Furthermore, the pushing device also includes a guide column and a guide sleeve, wherein the guide sleeve is provided with a sleeve hole, and the guide column passes through the sleeve hole and is connected with the push plate bolt, wherein when the electric push rod pushes the push plate to move, the guide column can slide in the sleeve hole.
[0008] Furthermore, when the pushing device returns to the initial point, the first inclined surface of the pressing block is separated from the second inclined surface of the fixing block.
[0009] Furthermore, the pushing device is connected to a mounting seat, and the mounting seat is used to be connected to a pneumatic vise.
[0010] The beneficial effect of the utility model is that: under the push of the pushing device, the first inclined surface of the pressing block and the first inclined surface of the fixing block are closed and pressed, thereby pressing the screw rod, the movement direction of the pressing block is perpendicular to the force direction and movement direction of the jaws of the pneumatic vise, and the angle θ between the first inclined surface of the pressing block and the active direction of the push plate is smaller than the friction angle, which plays a self-locking role. The self-locking mechanism of the present application is small in size, low in cost, easy to control, and has a stable self-locking function, which ensures the reliability and safety of the pneumatic vise, as well as the processing accuracy and quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0012] Figure 1 It is a schematic diagram of the self-locking structure of the utility model;
[0013] Figure 2 It is an exploded view of the self-locking structure of the utility model;
[0014] Figure 3 It is a cross-sectional view of the self-locking mechanism of the utility model when it is extended;
[0015] Figure 4 It is a cross-sectional view of the self-locking mechanism of the utility model when it is retracted;
[0016] Figure 5 A schematic diagram of the force applied to the compressing inclined block of the self-locking mechanism of the utility model;
[0017] Figure 6 This is a schematic diagram of the self-locking mechanism of the utility model installed on a pneumatic vise.
[0018] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0021] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.
[0022] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0023] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.
[0024] It should also be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.
[0025] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0026] like Figures 1 to 6 , a self-locking mechanism 1 for a pneumatic vise, the self-locking mechanism is used to act on a screw rod 2, the screw rod 2 is provided with a step 21, the self-locking mechanism 1 includes a push plate 11, a clamping block 12, a pushing device 13, a fixed block 14 and a thrust ball bearing 15, one side of the push plate 11 is connected to the clamping block 12, the other side of the push plate 11 is connected to the pushing device 13, the clamping block 12 is provided with a first inclined surface 121, the fixed block 14 is provided with a second inclined surface 141, the first inclined surface 121 is in contact with the second inclined surface 141, the thrust ball bearing 15 can move to the step 21 and contact the step 21, wherein when the clamping block 12 moves, the first inclined surface 121 slides along the second inclined surface 141 to push the fixed block 14 to move toward the thrust ball bearing 15, the angle between the first inclined surface 121 and the moving direction of the push plate 11 is θ, θ<arctanμ, μ is the friction coefficient.
[0027] The pushing device 13 pushes the push plate 11 to move, thereby pushing the clamping block 12 out, and the first inclined surface 121 of the clamping block 12 slides along the second inclined surface 141 to push the fixed block 14 to move toward the thrust ball bearing 15, and the thrust ball bearing 15 moves to contact the step 21, so that the first inclined surface 121 of the clamping block 12 and the second inclined surface 141 of the fixed block 14 are closed and pressed, thereby clamping the screw rod 2 so that the inclined surface angle θ of the clamping block 12 is less than the friction coefficient, that is, when θ<arctanμ, when the external force such as cutting force is applied during processing, the screw rod cannot move axially, and plays a self-locking role; at this time, the screw rod 2 has the effect of the thrust ball bearing 15, and the axial pressure applied by the clamping block 12 to the screw rod 2 will not limit the rotation of the screw rod 2, and the screw rod can still be rotated, the position of the movable jaws of the pneumatic vise is adjusted, and the clamping size of the pneumatic vise is adjusted to complete the processing action.
[0028] Furthermore, the push plate 11 is located on the side of the screw rod 2 and moves toward the side of the screw rod 2. The clamping block 12 is provided with a first movable avoidance hole 122, which is used to enable the clamping block 12 to move away from the interference of the screw rod 2; the fixed block 14 is provided with a second movable avoidance hole 142, which is used to enable the fixed block 14 to move away from the interference of the screw rod 2. The screw rod 2 passes through the second movable avoidance hole 142 and the first movable avoidance hole 122 in sequence.
[0029] Furthermore, the pushing device 13 includes an electric push rod 131 and a connecting rod seat 132 . The electric push rod 131 is provided with a latch hole 133 . The connecting rod seat is hingedly connected to the electric push rod 131 via a latch 134 . The connecting rod seat 132 is bolted to the push plate 11 .
[0030] Furthermore, the pushing device 13 also includes a guide column 135 and a guide sleeve 136. The guide sleeve 136 is provided with a sleeve hole 137. The guide column 135 passes through the sleeve hole 137 and is bolted to the push plate 11. When the electric push rod 131 pushes the push plate 11 to move, the guide column 135 can slide in the sleeve hole 137.
[0031] Furthermore, when the pushing device 13 returns to the initial point, the first inclined surface 121 of the clamping block 12 is separated from the second inclined surface 141 of the fixing block 14, that is, when the screw rod 2 is subjected to radial force, it will not be transmitted to the electric push rod 131 through the push plate 11, thereby extending the service life of the electric push rod 131.
[0032] Furthermore, the pushing device 13 is connected with a mounting seat 3 , and the mounting seat 3 is used to be connected with a pneumatic vise 4 .
[0033] Regarding the embodiments of the present utility model, it should also be noted that, in the absence of conflict, the embodiments of the present utility model and the features therein can be combined with each other to obtain new embodiments.
[0034] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. The protection scope of the utility model shall be based on the protection scope of the claims. Although the utility model has been disclosed as a preferred embodiment, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modify the technical content disclosed above to an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the technical solution of the utility model.
Claims
1. A self-locking mechanism for a pneumatic vise, the self-locking mechanism being used to act on a screw rod, characterized in that: The screw rod is provided with a step, and the self-locking mechanism includes a push plate, a clamping block, a pushing device, a fixed block and a thrust ball bearing. One side of the push plate is connected to the clamping block, and the other side of the push plate is connected to the pushing device. The clamping block is provided with a first inclined surface, and the fixed block is provided with a second inclined surface. The thrust ball bearing can move to the step and contact the step, wherein when the clamping block moves, the first inclined surface slides along the second inclined surface to push the fixed block to move toward the thrust ball bearing, and the angle between the first inclined surface and the moving direction of the push plate is θ, θ<arctanμ, and μ is the friction coefficient.
2. A self-locking mechanism for a pneumatic vise according to claim 1, characterized in that: The push plate is located on the side of the screw rod and moves toward the side of the screw rod. The clamping block is provided with a first movable avoidance hole, which is used to allow the clamping block to move without interference from the screw rod. The fixed block is provided with a second movable avoidance hole, which is used to allow the fixed block to move without interference from the screw rod. The screw rod passes through the second movable avoidance hole and the first movable avoidance hole in sequence.
3. A self-locking mechanism for a pneumatic vise according to claim 2, characterized in that: The pushing device comprises an electric push rod and a connecting rod seat. The electric push rod is provided with a latch hole. The connecting rod seat is hingedly connected to the electric push rod through a latch, and the connecting rod seat is bolted to the push plate.
4. A self-locking mechanism for a pneumatic vise according to claim 3, characterized in that: The pushing device also includes a guide column and a guide sleeve. The guide sleeve is provided with a sleeve hole. The guide column passes through the sleeve hole and is connected with the push plate bolt. When the electric push rod pushes the push plate to move, the guide column can slide in the sleeve hole.
5. A self-locking mechanism for a pneumatic vise according to claim 4, characterized in that: When the pushing device returns to the initial point, the first inclined surface of the pressing block is separated from the second inclined surface of the fixing block.
6. A self-locking mechanism for a pneumatic vise according to claim 5, characterized in that: The pushing device is connected with a mounting seat, and the mounting seat is used to be connected with a pneumatic vise.