Self-locking mechanism for pneumatic vice

Abstract

The utility model discloses a self-locking mechanism for a pneumatic vice, which relates to the field of clamping tools and comprises an air cylinder, a pushing sliding block, a cushion block, an anti-deviation plate and a fixing block. The cylinder is fixedly mounted on the side of the pneumatic vice; the cylinder comprises a cylinder barrel, a piston, a piston rod and a connecting plate; a pushing sliding block is fixedly connected to the connecting plate, a long slotted hole is formed in the middle of the pushing sliding block, and the lead screw penetrates through the slotted hole; the fixing block and the cushion block are installed on the lead screw, the cushion block is arranged on the front side of the pushing sliding block, and the fixing block is arranged behind the pushing sliding block. When the pneumatic vice works, the piston rod extends out to drive the pushing sliding block to slide on the lead screw, the pushing sliding block and the fixing block are folded and pressed, and therefore pushing force is applied to the lead screw, and the situation that materials shake and fall off due to external force when the pneumatic vice is used for clamping the materials can be avoided. A cylinder of the self-locking mechanism and a cylinder of the pneumatic vice share one set of pneumatic control system; the technology has the advantages of simple and practical structure, safety in use, convenience in control, low cost and the like.

Description

Technical Field

[0001] The utility model relates to the field of clamping tools, and more specifically to a pneumatic vise self-locking mechanism. 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 materials for processing, they may cause unstable clamping, easy falling off, shaking, etc. due to unstable air pressure or external force, which seriously affects production efficiency and product quality.

[0003] Therefore, a self-locking mechanism is developed to prevent the pneumatic vise from clamping materials in an unstable state, shaking, and falling off due to unstable air pressure or external force. The working reliability and safety of the pneumatic vise are improved. Even if the air pressure of the pneumatic vise is unstable during use, the self-locking mechanism can still provide sufficient clamping force for the pneumatic vise to ensure that the material does not loosen or fall, and to ensure the safety of mechanical processing and product accuracy. It has important practical significance and application value. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems that the existing pneumatic vises have unstable clamping, easy to fall off, and shaking during use, the existing self-locking mechanisms have hydraulic, electromagnetic and other designs, but these methods have the problems of high cost and large volume. The purpose of the utility model is to provide a pneumatic vise with a self-locking mechanism that is small in size, low in cost, easy to control, and can improve the clamping force of the pneumatic vise.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A self-locking mechanism for a pneumatic vise, referred to as a self-locking mechanism, includes a cylinder, a fixed block, a push slider, a cushion block and an anti-deflection plate. The cylinder of the self-locking mechanism is fixed on the side of the pneumatic vise, and a push slider is fixed on the cylinder. The push slider moves in extension and contraction under the drive of the cylinder. There is a long slot hole in the middle of the push slider, and the screw rod of the pneumatic vise passes through the hole; when the push slider is extended and contracted, it slides on the screw rod through the long slot hole; the push slider has a fixed block at the rear end and a cushion block at the front; a round hole is provided between the cushion block and the fixed block, which is fixed on the screw rod, and the fixed block fits the positioning step on the screw rod; an anti-deflection plate is provided below the fixed block; the push slider and the fixed block also have matching inclined surfaces; when the push slider is extended under the drive of the cylinder, the inclined surface of the push slider is closed and pressed against the inclined surface of the fixed block, and when the push slider is retracted under the drive of the cylinder, the inclined surface of the push slider is away from the inclined surface of the fixed block.

[0009] Further, the self-locking mechanism is installed on the left side of the pneumatic vise, and the pneumatic vise includes a clamp body, a screw rod, a slider nut, a screw rod nut, a movable cover, a movable jaw, a fixed jaw, a fixed baffle and a pneumatic vise cylinder;

[0010] Furthermore, the cylinder includes a cylinder barrel, a piston, a piston rod and a connecting plate; the cylinder barrel has a cavity inside; the piston is arranged inside the cavity, and the piston can slide inside the cavity; the piston is fixedly connected to the right side of the piston with a piston rod; the piston rod is fixedly connected to the right side of the piston plate; the cylinder is fixed to the side of the pneumatic vise, and a pushing slider is also fixed on the connecting plate of the cylinder, which can drive the pushing slider to perform telescopic movement.

[0011] Furthermore, the pushing slider and the fixed block are provided with matching inclined surfaces, and the fixed block is fitted with the positioning step of the screw rod; when the pushing slider is extended under the drive of the cylinder, the inclined surface of the pushing slider and the inclined surface of the fixed block are closed and pressed, and the fixed block is pressed against the positioning step of the screw rod by force, and the screw rod is compressed and the pressure is transmitted to the movable jaw through the slider nut and the movable cover, and the pneumatic vise remains in a self-locking state; when the pushing slider is retracted under the drive of the cylinder, the pushing slider is away from the fixed block, and the opening of the jaws of the pneumatic vise is not affected.

[0012] Furthermore, the anti-deflection plate is installed on the fixed block, and the anti-deflection plate is in contact with the lower plane of the pushing slider and can slide relatively.

[0013] Furthermore, the cylinder of the self-locking mechanism and the cylinder of the pneumatic vise share a set of air control system. When the pneumatic vise is clamped, the self-locking mechanism is self-locked at the same time; when the pneumatic vise is loosened, the self-locking mechanism is unlocked at the same time. Further, the self-locking mechanism is installed on the left side of the pneumatic vise. The pneumatic vise includes a clamp body, a screw, a slider nut, a movable cover, a movable jaw, a fixed jaw, a fixed baffle and a pneumatic vise cylinder.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] (1) The push slider of the self-locking mechanism applies thrust to the screw rod through the inclined surface, and the sliding direction is perpendicular to the screw rod. Even if the air pressure is insufficient during the use of the pneumatic vise, the push slider can still maintain the self-locking state, so that the pneumatic vise can still clamp the material without shaking or falling off, thereby improving work safety and ensuring product processing quality.

[0016] (2) The self-locking mechanism can improve the clamping force of the pneumatic vise. Whether it is heavy clamping or light clamping, the self-locking mechanism can ensure the stability of the pneumatic vise in clamping the material, thereby enhancing the application range of the pneumatic vise.

[0017] (3) The self-locking mechanism has a simple and practical structure, a small size, and is very convenient to install, debug and use.

[0018] (4) The cylinder of the self-locking mechanism and the cylinder of the pneumatic vise share a common pneumatic control system, which is very convenient to control, with low energy consumption and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the self-locking mechanism of the utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the self-locking mechanism of the utility model installed on a pneumatic vise;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of a pneumatic vise;

[0022] Figure 4 It is a three-dimensional top view structural diagram of the self-locking mechanism cylinder of the utility model;

[0023] Figure 5 The schematic diagrams of the structure of the self-locking mechanism of the utility model when being unlocked or self-locked;

[0024] Figure 6 The schematic diagram of the structure of the pneumatic vise of the utility model when clamping or releasing the material;

[0025] Figure 7 It is a schematic diagram of the self-locking mechanism and the air circuit of the pneumatic vise of the utility model.

[0026] Description of the numbers in the figure:

[0027] 1. Cylinder; 1-1. Cylinder barrel; 1-2. Piston; 1-3. Piston rod; 1-4. Connecting plate; 2. Push slider; 3. Spacer block; 4. Anti-bias plate; 5. Fixed block; 6. Pneumatic vise; 6-1. Clamp body; 6-2. Screw; 6-3. Slider nut; 6-4. Screw nut; 6-5. Movable cover; 6-6. Movable jaws; 6-7. Fixed jaws; 6-8. Fixed baffle; 6-9. Pneumatic vise cylinder. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] See also Figure 1 The self-locking mechanism includes a self-locking mechanism cylinder, a pushing slider, a cushion block, an anti-deflection plate and a fixing block.

[0033] See also Figure 2 , the self-locking mechanism is installed on the left side of the pneumatic vise.

[0034] See also Figure 3 The pneumatic vise includes a clamp body, a screw rod, a slider nut, a screw rod nut, a movable cover, a movable jaw, a fixed jaw, a fixed baffle and a pneumatic vise cylinder.

[0035] See also Figure 4 The self-locking mechanism cylinder includes a cylinder barrel, a piston, a piston rod and a connecting plate; there is a cavity inside the cylinder barrel; the piston is arranged inside the cavity, and the piston can slide in the cavity; the piston is fixedly connected to the right side of the piston with a piston rod; and the connecting plate is fixedly connected to the right side of the piston rod.

[0036] See also Figure 5 and Figure 6 The pushing slider is fixedly mounted on the connecting plate of the cylinder of the self-locking mechanism. Driven by the cylinder, the pushing slider can perform telescopic movement. The cushion block is installed in front of the pushing slider, and the fixed block is installed at the rear of the pushing slider. There is a round hole between the cushion block and the fixed block, and there is a long slot hole in the middle of the pushing slider, through which the screw rod passes. There is a positioning step on the screw rod, and the fixed block fits with the positioning step.

[0037] The pushing slider and the fixed block are provided with matching inclined surfaces, and the pushing slider can slide relative to the lead screw under the drive of the self-locking mechanism cylinder; when the pushing slider is extended, the inclined surface of the pushing slider and the inclined surface of the fixed block are closed and pressed, and the fixed block thereby presses the positioning step of the lead screw, and the pressure on the lead screw is transmitted to the movable jaw through the slider nut and the clamping movable cover, thereby improving the clamping force of the pneumatic vise on the material and keeping the movable jaw in a self-locking state; when the pneumatic vise clamps the material for processing, even if the air pressure is unstable or is acted upon by external force, the movable jaw will not retreat or shake, thereby ensuring the quality of the machined products, and the pneumatic vise meets the requirements of light clamping and heavy clamping.

[0038] When the push slider is retracted under the drive of the self-locking mechanism cylinder, the push slider is away from the fixed block, and the self-locking mechanism is unlocked; the pneumatic vise can release the material;

[0039] The anti-deflection plate is installed below the fixed block, and the anti-deflection plate is in contact with the lower plane of the push slider. When the push slider slides, the fixed block and the push slider remain parallel and will not deflect or misalign.

[0040] See also Figure 7 The cylinder of the self-locking mechanism and the cylinder of the pneumatic vise share a set of air control systems; when the pneumatic vise is clamped, the retracted rod of the self-locking mechanism extends, pushing the slider and the inclined surface of the fixed block to close and press, thereby pushing the screw rod to keep the pneumatic vise in a clamped and self-locking state and increase the clamping force; when the pneumatic vise is released, the slider is pushed away from the fixed block, the movable jaws are retracted, and the pneumatic vise releases the material.

[0041] When the pneumatic vise is used in mechanical processing, the preparation work before use is as follows: use the screw wrench to rotate the screw, and adjust the distance between the movable jaw and the fixed jaw to the appropriate size according to the size of the workpiece.

[0042] When using the pneumatic vise, the functions of the self-locking mechanism are as follows:

[0043] Step 1: Manually control the control valve or the air control system to give a release command, the self-locking mechanism cylinder is ventilated and works, the cylinder piston rod is retracted, pushing the slider away from the fixed block, and the screw rod is released from self-locking;

[0044] Step 2: Synchronously, the pneumatic vise cylinder is ventilated to loosen the movable jaws;

[0045] Step 3: Place the materials manually or automatically by loading and unloading machines;

[0046] Step 4: Manually control the control valve or the pneumatic control system to give a clamping command, and the pneumatic vise cylinder is ventilated to work, driving the movable jaws to move and clamp the material;

[0047] Step 5: Synchronously, the self-locking mechanism is ventilated and the cylinder piston rod extends, pushing the slider and the inclined surface of the fixed block to close and press, thereby pushing the screw rod to keep the pneumatic vise clamped and self-locking.

[0048] Step 6: The pneumatic vise holds the material until the machining equipment completes the material processing process;

[0049] Step 7: Manually control the control valve or the air control system to give a release command, the self-locking mechanism is ventilated and works, the cylinder piston rod is retracted, pushing the slider away from the fixed block, and the screw rod is released from self-locking;

[0050] Step 8: Synchronously, the pneumatic vise cylinder is ventilated to loosen the movable jaws;

[0051] Step 9: Take away the processed materials manually or through automatic loading and unloading machines;

[0052] The above steps are only a one-time operation procedure for this technology to cooperate with pneumatic vises and CNC equipment to complete material clamping and processing. In the actual working process, the above steps 1 to 9 will be repeated continuously according to the number of materials until all the materials are processed.

[0053] This self-locking mechanism can improve the clamping strength of the pneumatic vise, and can ensure that the movable jaws will not retreat or shake when the pneumatic vise clamps materials for processing, thereby ensuring the reliability and safety of the pneumatic vise, meeting the requirements of heavy and light clamping, and enhancing the application range of the pneumatic vise. It uses compressed air as the power and shares a pneumatic control system with the cylinder of the pneumatic vise. It has a simple and practical structure, and has the advantages of small space occupation, low energy consumption, low cost, and very convenient control.

Claims

1. A self-locking mechanism for a pneumatic vise, comprising a cylinder (1), a push slider (2), a cushion block (3), an anti-deflection plate (4) and a fixing block (5), characterized in that: The cylinder (1) of the self-locking mechanism is fixed on the side of the pneumatic vise, and a push slider (2) is fixed on the cylinder (1). The push slider is driven by the cylinder (1) to move in a telescopic manner. A long slot hole is provided in the middle of the push slider (2), and a screw rod (6-2) of the pneumatic vise passes through the hole. When the push slider (2) is extended or retracted, it slides on the screw rod (6-2) through the long slot hole. The push slider (2) has a fixed block (5) at the rear end and a cushion block (3) at the front. A round block is provided between the cushion block (3) and the fixed block (5). The screw rod (6-2) has a hole, which is fixed on the screw rod (6-2), and the fixed block (5) is fitted with the positioning step on the screw rod (6-2); an anti-deflection plate (4) is arranged below the fixed block (5); the pushing slider (2) and the fixed block (5) also have matching inclined surfaces; when the pushing slider (2) is extended under the drive of the cylinder, the inclined surface of the pushing slider (2) and the inclined surface of the fixed block (5) are closed and pressed tightly; when the pushing slider (2) is retracted under the drive of the cylinder, the inclined surface of the pushing slider (2) is away from the inclined surface of the fixed block (5).

2. A self-locking mechanism for a pneumatic vise according to claim 1, characterized in that: The self-locking mechanism is installed on the left side of the pneumatic vise (6). The pneumatic vise (6) comprises a clamp body (6-1), a screw rod (6-2), a slider nut (6-3), a screw rod nut (6-4), a movable cover (6-5), a movable jaw (6-6), a fixed jaw (6-7), a fixed baffle (6-8) and a pneumatic vise cylinder (6-9). The clamp body (6-1) is placed on a platform, the screw rod (6-2) passes through the cavity in the middle of the clamp body (6-1), and one end remains outside the clamp body (6-1). A screw nut (6-4) is provided on the screw rod (6-2), and the other end is connected to the pneumatic vise cylinder (6-9); the middle section of the screw rod (6-2) is threadedly matched with the slider nut (6-3), and when the screw rod (6-2) rotates, the slider nut (6-3) slides on the screw rod (6-2); the upper end of the slider nut (6-3) is matched with the inclined surface of the movable cover (6-5); the movable cover (6-5) is also connected to a movable jaw (6-6); and a fixed jaw (6-7) is fixed to the rear end of the clamp body (6-1).

3. A self-locking mechanism for a pneumatic vise according to claim 1, characterized in that: The cylinder (1) comprises a cylinder barrel (1-1), a piston (1-2), a piston rod (1-3) and a connecting plate (1-4); the cylinder barrel (1-1) has a cavity inside; the piston (1-2) is arranged inside the cavity and can slide inside the cavity; the piston (1-2) is fixedly connected to the right side of the piston rod (1-3); the piston rod (1-3) is fixedly connected to the right side of the connecting plate (1-4); the cylinder (1) is fixed to the side of the pneumatic vise, and a push slider (2) is also fixed on the connecting plate (1-4) of the cylinder (1), which can drive the push slider (2) to perform telescopic movement.

4. A self-locking mechanism for a pneumatic vise according to claim 1, characterized in that: The push slider (2) and the fixed block (5) are provided with matching inclined surfaces, and the fixed block (5) fits the positioning step of the screw rod (6-2); when the push slider (2) is extended under the drive of the cylinder, the inclined surface of the push slider (2) and the inclined surface of the fixed block (5) are closed and pressed, and the fixed block (5) is pressed against the positioning step of the screw rod (6-2), and the screw rod (6-2) is pressed and the pressure is transmitted to the movable jaw (6-6) through the slider nut (6-3) and the movable cover (6-5), and the pneumatic vise maintains a self-locking state; when the push slider (2) is retracted under the drive of the cylinder, the push slider (2) is away from the fixed block (5), and the opening of the jaws of the pneumatic vise is not affected.

5. The self-locking mechanism for a pneumatic vise according to claim 1, characterized in that: The anti-deflection plate (4) is installed below the fixed block (5), and the anti-deflection plate (4) is in contact with the lower plane of the push slider (2) and can slide relative to each other.

6. The self-locking mechanism for a pneumatic vise according to claim 1, characterized in that: The cylinder of the self-locking mechanism and the cylinder of the pneumatic vise share a set of pneumatic control systems. When the pneumatic vise (6) is clamped, the self-locking mechanism is self-locked at the same time; when the pneumatic vise (6) is released, the self-locking mechanism is unlocked at the same time.

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