Quick clamping and pressurizing bench clamp

Abstract

The utility model provides a hydraulic boosting quick clamping bench clamp which comprises a base, a guide rail integrally arranged with the base and a movable clamp body capable of moving left and right along the guide rail in a reciprocating mode, and a single screw rod boosting mechanism, a booster and a cohesion mechanism are arranged in the movable clamp body. The single-screw force applying mechanism comprises a screw and a connector, the connector comprises a nut structure installed on the screw, and the screw and the connector generate relative axial movement through rotation of the screw. A cylinder body of the supercharger is installed at the left end of the connector, a small plunger abuts against the head of the lead screw, and a large piston abuts against the movable jaw. When the lead screw rotates and moves forwards, the small plunger is pushed to move forwards, the large piston moves forwards, the movable jaw and the movable vice body are driven to move forwards, and a workpiece is clamped. The single-screw-rod stress application mechanism is matched with the cohesion mechanism, and the workpiece can be clamped within the half-circle rotation of the screw rod. According to the bench clamp, rapid moving and clamping of the movable clamp body can be achieved, efficient working performance is achieved, the structure is simpler and more compact, and the size of the bench clamp is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bench vice, specifically to a quick clamping pressurization bench vice. BACKGROUND

[0002] In the field of machining, assembly, etc., bench vice as a commonly used clamping tool plays a crucial role in work efficiency and machining accuracy. The traditional screw rod force adding bench vice is a relatively common clamping device, which has a relatively simple structure and mainly relies on the rotation of the screw rod to realize the opening and closing of the jaw. However, this conventional screw rod force adding bench vice has many limitations in practical application. Its work efficiency is relatively low, and the operator needs to spend a lot of time and effort to complete the clamping operation of the workpiece, resulting in a relatively large labor intensity. At the same time, its force multiplication is relatively small when clamping, and for some work scenes that require a large clamping force, it is difficult to achieve the ideal clamping effect, thereby affecting the smooth progress of the entire machining or operation process and limiting its application range in industrial production.

[0003] In order to overcome the shortcomings of the traditional screw rod force adding bench vice, new technical solutions are constantly explored in the industry. For example, a hydraulic force increasing quick clamping bench vice and clamping force adjusting mechanism is disclosed in Chinese patent No. CN202411058611.1. The patent realizes the clamping of the movable vice body and the guide rail through the clamping mechanism, providing stable support for the clamping action of the bench vice; the double screw rod force adding mechanism uses the rotation of the large screw rod to provide power for the clamping action and the pre-clamping action, and the small screw rod drives the force amplifier to realize high-pressure clamping, which enables the bench vice to realize the rapid movement and clamping of the movable vice body and conveniently adjust the clamping force. This design greatly improves the work efficiency of the bench vice, ensures the reliability of clamping, and to some extent solves some problems of the traditional bench vice.

[0004] However, the structure in this patent has the following shortcomings:

[0005] (1) The double screw rod force adding mechanism is relatively complex and has a large diameter, which directly leads to an increase in the height of the movable vice body of the bench vice;

[0006] (2) The clamping mechanism is driven by a wedge, and the transverse size of the wedge and the inclined wedge support block that cooperates with it is large, which increases the width of the guide rail and the movable vice body;

[0007] (3) The pressure adjusting mechanism also makes the overall structure more complex, further increasing the length of the movable vice body.

[0008] These structural shortcomings make the movable vice body of the bench vice too large, which is only suitable for large bench vice mechanisms. In some small machining scenes or space-limited working environments where the size of the bench vice is strictly required, this large bench vice cannot meet the actual demand, limiting its wide application.

[0009] Therefore, it is urgent to develop a technical solution that can not only have the advantages of efficient clamping and convenient clamping force adjustment, but also overcome the problems of complex structure and excessive size in the existing technology, and be suitable for small bench vise mechanisms. This is of great significance for promoting the development of bench vise technology and meeting the diverse needs of industrial production. Utility Model Content

[0010] To address the shortcomings of existing technologies, this utility model provides a quick-clamping pressure boosting vise. This vise enables rapid movement and clamping of the movable jaws, resulting in high-efficiency performance. Furthermore, by optimizing the structural design, its structure is made simpler and more compact, effectively reducing the size of the vise to adapt to different working scenarios, especially small processing environments with strict size requirements.

[0011] To achieve the above objectives, the specific solution adopted by this utility model is as follows:

[0012] A quick-clamping pressure boosting vise includes a base, a guide rail integrally formed with the base, and a movable vise body capable of reciprocating left and right along the guide rail. The working end of the base is provided with a fixed jaw, and the working end of the movable vise body is provided with a movable jaw. It also includes a single screw force-applying mechanism, a pressure booster, and a clamping mechanism disposed in the movable vise body.

[0013] The single-screw force-applying mechanism includes a screw and a connector. The connector includes a nut structure mounted on the screw, and the two move axially relative to each other through the rotation of the screw. The intensifier includes an end cap, a cylinder, a piston, and a plunger. The piston diameter is larger than the plunger diameter, and the area ratio of the two is the pressure ratio. The end cap is connected to the cylinder via threads, and a spring keeps the piston at the bottom right end of the cylinder. The cylinder is mounted on the left end of the connector, the plunger rests against the head of the screw, and the piston rod rests against the movable jaw. The single-screw force-applying mechanism, in conjunction with the clamping mechanism, can clamp the workpiece within half a turn of the screw.

[0014] Furthermore, in addition to the nut structure, the connector also includes a paddle block located at the lower part and integrally formed with the nut structure. The connector is connected to the clamping mechanism through the paddle block, which enables the clamping mechanism to work and generates a constraint force on it, thereby providing a supporting force for the single screw force application mechanism.

[0015] Furthermore, the clamping mechanism includes a wedge and two support blocks placed on both sides of the wedge; the clamping mechanism adopts a double sawtooth structure, wherein the wedge and the support blocks adopt a sawtooth inclined wedge structure, with the rear tooth surface of the sawtooth as the inclined wedge surface, to transmit power and movement; the support block and the inner side of the guide rail adopt a sawtooth clamping structure. When this structure clamps, the power is transmitted through the front tooth surface of the sawtooth, which can lock the support block and the guide rail, thereby providing support for the clamping action of the clamp body.

[0016] Furthermore, the wedge has a through-hole structure that matches the shape of the pusher block. The pusher block is inserted into the hole of the wedge to realize the connection between the single screw force application mechanism and the clamping mechanism.

[0017] Furthermore, the clamping mechanism also includes a guide block, which restricts the axial movement of the support block, allowing it to move only laterally for clamping action. The guide block has a limiting structure, which, when the two support blocks move back to back to clamp with the guide rail, stops the support blocks from moving outward, preventing them from exerting lateral pressure on the guide rail and causing deformation. A compression spring is installed between the support block and the limiting structure to ensure that the support block and the wedge block are always in contact, and that the support block can disengage from the guide rail when the clamping mechanism is not clamped.

[0018] Furthermore, the piston has a blind hole with a diameter larger than the diameter of the plunger head and a depth greater than the plunger stroke, allowing the piston to reach the right end face of the cylinder and form an oil-free chamber structure.

[0019] Beneficial effects:

[0020] (1) This utility model adopts a single screw force-applying mechanism in conjunction with a clamping mechanism to achieve rapid movement and immediate clamping of the movable jaw. Compared with the traditional screw force-applying bench vise, its clamping stroke is small, and clamping can be achieved within half a turn of the screw, which greatly improves the clamping efficiency. In actual operation, when there is a large amount of looseness between the workpiece and the jaws before clamping, the operator only needs to turn the handle back once and then turn the handle again to complete the clamping, which is simple and quick. Moreover, due to its half-turn clamping feature, even if the handle is in a position above the guide rail and cannot be rotated continuously, there is no need to use a handle with an extension rod, avoiding the inconvenience and space occupation caused by using an extension rod handle.

[0021] (2) The adoption of a single lead screw force-applying mechanism and a double sawtooth clamping structure makes the entire vise structure more compact. Compared with the double lead screw force-applying mechanism and complex clamping structure in the prior art, this utility model effectively reduces the effective size of the movable vise body, making it more suitable for vise designs of different specifications and improving design flexibility. Under the condition of achieving the same clamping force, it can achieve miniaturization of the overall structure, meeting the strict requirements of vise size for small processing scenarios or work environments with limited space.

[0022] (3) Adding a booster to the quick clamping mechanism can effectively increase the clamping force. The optimized structure of the booster effectively reduces the axial length of the cylinder, thereby reducing the axial length of the movable clamp body and further optimizing the overall structure of the vise. The hydraulic booster has a shock absorption effect, which can increase the stability of cutting.

[0023] (4) The guide slider in the clamping mechanism effectively restricts the movement of the support blocks. When the two support blocks move in opposite directions and clamp with the guide rail, the guide slider constrains the support blocks to no longer move outward, so that the guide rail is not deformed by lateral pressure, thus improving the guiding accuracy of the guide rail. This helps to ensure the movement accuracy of the movable clamp body, thereby improving the clamping accuracy and stability of the bench vise and ensuring the machining quality.

[0024] (5) This utility model eliminates the clamping force adjustment mechanism, making the overall structure simpler. In actual use, if the rated clamping force is required, a torque handle can meet the requirements. This simplified design not only reduces the manufacturing cost of the vise, but also reduces the potential for failure caused by the complex structure, and improves the reliability and maintenance convenience of the vise. Attached Figure Description

[0025] Figure 1 This is the front view of the bench vise of this utility model.

[0026] Figure 2 yes Figure 1 Sectional view at point AA.

[0027] Figure 3 This is a schematic diagram of the clamping mechanism.

[0028] Figure 4 This is a schematic diagram of the booster in this utility model.

[0029] Diagram markings: 1. Base, 2. Fixed jaws, 3. Movable jaws, 4. Intensifier, 4.1. End cap, 4.2. Spring, 4.3. Piston, 4.4. Cylinder, 4.5. Plunger, 5. Connector, 6. Movable jaw body, 7. Lead screw, 8. Wedge, 9. Guide block, 10. Support block, 11. Guide rail.

[0030] Figure 2 In the letter 'a', the mating surface is 'b', the front tooth surface is 'c', and the back tooth surface is 'c'. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] It should be noted that in this manual, the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the direction or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are merely for ease of description and simplification of this utility model. Terms such as "guide rail 11" and "support block 10" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, "axial" refers to the direction of movement of the movable jaw 6, i.e., parallel to the length of the guide rail 11 in the base 1. "Rightward" refers to the direction away from the fixed jaw 2. "Transverse" refers to the horizontal direction perpendicular to the axial direction. "Leftward" refers to the direction of movement towards the fixed jaw 2. "Forward movement" refers to the direction of movement that enables the vise to clamp. "Clamping" refers to the locking state where the clamping teeth between the outer surface of the support block 10 and the inner surface of the guide rail 11 are engaged, preventing axial movement. "Outward movement" refers to the back-to-back movement of the two support blocks 10, i.e., the movement of clamping. "Inward movement" refers to the opposite movement of the two support blocks 10, i.e., the movement of disengaging from clamping. "Movement" and "movement" have the same meaning. The above terms are for the convenience of describing this utility model and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model.

[0033] Example 1

[0034] This embodiment provides a quick-clamping pressure-boosting vise; please refer to [reference needed]. Figures 1 to 4 It includes a base 1, a guide rail 11 integrally formed with the base 1, and a movable clamp body 6 that can move back and forth along the guide rail 11. The working end of the base 1 is provided with a fixed jaw 2, and the working end of the movable clamp body 6 is provided with a movable jaw 3. The movable clamp body 6 is provided with a single screw force-applying mechanism, an oil-free hydraulic booster (referred to as booster 4), and a clamping mechanism.

[0035] The single-screw force-applying mechanism includes a screw 7 and a connector 5 with a nut structure sleeved outside the screw 7. The two components move axially relative to each other through the rotation of the screw 7. The intensifier 4 includes an end cap 4.1, a cylinder 4.4, a piston 4.3, and a plunger 4.5. The cylinder 4.4 of the intensifier 4 is mounted on the left end of the connector 5. The plunger 4.5 at the right end of the intensifier 4 rests against the head of the screw 7, and the piston 4.3 at the left end rests against the movable jaw 3. The movable jaw 3 is fixed to the movable jaw body 6. When the screw 7 rotates forward, it pushes the plunger 4.5 forward, causing the piston 4.3 to move forward, which in turn drives the movable jaw 3 and the movable jaw body 6 forward, thus clamping the workpiece. The pressure ratio of the intensifier 4 is equal to the area of ​​the piston 4.3 divided by the area of ​​the plunger. During clamping, the reverse force of the cylinder 4.4 in the intensifier 4 is borne by the connector 5.

[0036] The connector 5 integrates the upper nut structure and the lower lever block into one unit. It is connected to the clamping mechanism through the lever block, which enables the clamping mechanism to work and generates a constraint force on it, thereby providing support force to the force-applying mechanism.

[0037] The piston 4.3 has a blind hole with a diameter larger than the head diameter of the plunger 4.5 and a depth greater than the stroke of the small plunger 4.5. When the booster 4 is working, interference between the piston 4.3 and the plunger 4.5 is avoided, allowing the piston 4.3 to reach the right end face of the cylinder 4.4, forming an oil-free cavity structure (the oil cavity is located in the blind hole of the piston 4.3, and there is no oil cavity between the piston 4.3 and the cylinder 4.4), shortening the length of the cylinder 4.4, thereby reducing the axial length of the movable clamp 6 and further optimizing the overall structure of the vise.

[0038] Specifically, the clamping mechanism mainly consists of a wedge 8 and two support blocks 10 located on both sides of the wedge 8. This clamping mechanism employs a unique double-serrated structure, namely a serrated wedge structure and a serrated clamping structure, both types of serrations having a front tooth surface b and a rear tooth surface c. A serrated wedge structure is used between the wedge 8 and the support blocks 10, transmitting power and motion through the rear tooth surface c of the serrations between them. To improve the efficiency of the clamping motion, the angle between the wedge surface and the axial direction is designed to be relatively large, typically around 45° or greater. Simultaneously, the tooth height is more than three times the height of the clamping serrations, which not only ensures that the support blocks 10 have sufficient clamping stroke but also guarantees sufficient strength after sliding outwards. A serrated clamping structure is used between the support blocks 10 and the inner surface of the guide rail 11. When this structure clamps, power is transmitted through the front tooth surface b of the serrations, locking the support blocks 10 and the guide rail 11, thereby providing stable support for the clamping action of the movable clamp body 6. The angle between the meshing surface 'a' of the saw teeth and the transverse direction is extremely small (less than the friction angle). This design ensures that the saw teeth meshing structure will not slip under axial force. The meshing stroke of the support block 10 is determined by the height of the saw teeth and the distance between the tooth tips of the two saw teeth when disengaging. To effectively reduce the meshing stroke, it is preferable to use sub-millimeter tooth profiles for the meshing saw teeth. Since the strength of a single tooth profile is relatively weak, a certain number of saw teeth are required to meet the support strength requirements. This results in corresponding requirements for the mating length and height of the support block 10; the saw teeth of the guide rail 11 cover the entire mating surface. The use of a larger wedge angle and sub-millimeter meshing saw teeth allows the lead screw 7 to achieve the meshing action with only a small rotation angle.

[0039] The wedge 8 has a through hole structure that matches the shape of the pusher. The pusher is inserted into the hole of the wedge 8 to achieve a rigid connection between the single screw force application mechanism and the clamping mechanism.

[0040] Furthermore, the clamping mechanism also includes a guide slider 9, which restricts the axial movement of the support block 10, allowing it to clamp only laterally. The guide slider 9 has a limiting structure, specifically a limiting step. When the two support blocks 10 move back-to-back and clamp with the guide rail 11, they stop moving outward due to the constraint of the limiting step, preventing lateral pressure on the guide rail 11 and thus avoiding deformation. A compression spring is installed between the support block 10 and the limiting step to ensure that the wedge block 8 and the support block 10 are always in contact, so that the support block 10 is disengaged from the guide rail 11 when not clamped. Alternatively, a guide pin can be fixedly installed on the wedge block 8, and a guide groove can be provided between the support blocks 10 along a direction parallel to the sliding surface. The guide portion of the guide pin slides into the guide groove, keeping the mating surfaces between the wedge block 8 and the support block 10 in contact; or a tension spring can be provided between the two support blocks 10 to maintain contact between the wedge block 8 and the support block 10.

[0041] The working principle of a bench vise is:

[0042] 1) Rapid forward movement of the movable jaw 6: Place the workpiece on the upper surface of the guide rail 11, push the movable jaw 6 to make the jaws close quickly and contact the workpiece; 2) Clamping action: Due to the sensitive action of the clamping mechanism, the required force is very small. When the lead screw 7 rotates, the lead screw and the movable jaw 6 will not move axially, but the connector 5 will move to the right. The wedge block 8 will move to the right through the lever block, and the two support blocks 10 will move outward through the sawtooth wedge structure to achieve clamping and fixing with the guide rail 11; 3) Clamping action: After the support blocks 10 clamp, they are fixed by the wedge block 8 and the connector 5. When the lead screw 7 continues to rotate, it will start to move to the left and move forward. The pressure booster 4 will drive the movable jaw 6 to perform pressure clamping action; 4) Unclamping action: The lead screw 7 reverses and moves backward, first releasing the clamping force, and then driving the connector 5 to move to the left. The clamping mechanism will release the clamping, so that the support blocks 10 will disengage from the guide rail 11, and the workpiece can be taken out.

[0043] This embodiment uses a single lead screw force-applying mechanism to achieve essentially the same function as a double lead screw hydraulic booster force-applying mechanism. The locking and unlocking of the movable clamp body 6 and the base 1 is achieved through a clamping mechanism, enabling rapid movement and immediate clamping of the movable clamp body 6. The required clamping stroke is very small, and clamping can be achieved within half a turn of the lead screw 7, resulting in high clamping efficiency. During the clamping action, if the handle is already above the guide rail 11 and cannot rotate continuously, the half-turn clamping feature of this invention eliminates the need for a handle with an extension rod, whereas general lead screw clamping mechanisms require an extension rod. If there is significant looseness between the workpiece and the jaws before clamping, and clamping is not achieved after one (half-turn) rotation of the handle, the handle can be rotated back slightly, and clamping can be achieved by rotating the handle again.

[0044] When using the hydraulically amplified quick-clamping vise of this invention, the operator first adjusts the position of the movable jaw 6 according to the size and shape of the workpiece, so that the fixed jaw 2 and the movable jaw 3 are roughly aligned with the workpiece. Then, the lead screw 7 is rotated, which drives the connector 5 to move axially. The lever on the connector 5 pushes the wedge block 8 to move, causing the support block 10 of the clamping mechanism to disengage from the guide rail 11, allowing the movable jaw 6 to move quickly. When the movable jaw 3 approaches the workpiece, the lead screw 7 is rotated again, pushing the plunger 4.5. The plunger 4.5 compresses the hydraulic oil, causing the piston 4.3 to drive the movable jaw 3 to clamp the workpiece. During the clamping process, the support block 10 of the clamping mechanism re-clamps with the guide rail 11, providing stable support for the clamping action. If it is necessary to release the workpiece, the lead screw 7 is rotated in the opposite direction, causing the connector 5 to move in the opposite direction. The lever pulls the wedge block 8 in the opposite direction, causing the support block 10 to disengage from the guide rail 11, allowing the movable jaw 6 to release quickly.

[0045] This utility model of a hydraulically amplified, quick-clamping vise can effectively achieve rapid movement and clamping of the movable vise body, meeting the needs of different working scenarios and providing an efficient and reliable clamping tool for machining, assembly and other fields.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model in any way. All equivalent modifications or alterations made based on the essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A rapid clamping booster bench clamp, comprising a base, a guide rail integrally arranged with the base, a movable clamp body capable of reciprocating left and right along the guide rail, a fixed clamp jaw is arranged at the working end of the base, and a movable clamp jaw is arranged at the working end of the movable clamp body, characterized in that, It also includes a single-wire rod force mechanism, a supercharger and a clamping mechanism in the movable jaw; The single-wire rod force mechanism includes a screw rod and a connector, the connector includes a nut structure mounted on the screw rod, and the relative axial movement is generated by the rotation of the screw rod; the supercharger includes an end cover, a cylinder body, a piston and a plunger, the diameter of the piston is larger than that of the plunger, and the area ratio of the two is the supercharging ratio; the end cover is connected with the cylinder body through threads, and the piston is at the right end bottom position of the cylinder body through the spring; the cylinder body is installed at the left end of the connector, the plunger head abuts against the screw rod, and the piston rod abuts against the movable jaw; the single-wire rod force mechanism cooperates with the clamping mechanism to realize clamping of the workpiece within a half rotation of the screw rod.

2. A rapid clamping torque wrench according to claim 1, wherein The connector includes a knob structure in addition to the nut structure, the knob structure is integrally arranged with the nut structure at the lower part, the connector is connected with the clamping mechanism through the knob, the clamping mechanism can work, and the clamping mechanism generates a constraint force to the single-wire rod force mechanism, thereby providing a supporting force to the single-wire rod force mechanism.

3. A rapid clamping torque wrench according to claim 2, wherein The clamping mechanism includes a wedge block and two supporting blocks arranged on both sides of the wedge block; the clamping mechanism adopts a double sawtooth structure, wherein a sawtooth wedge structure is adopted between the wedge block and the supporting block, the rear tooth surface of the sawtooth is used as the wedge surface to transmit power and movement; a sawtooth clamping structure is adopted between the supporting block and the inner side surface of the guide rail, when the structure is clamped, the power is transmitted through the front tooth surface of the sawtooth, so that the supporting block and the guide rail are locked, thereby providing support for the clamping action of the jaw.

4. A rapid clamping torque wrench according to claim 3, wherein The wedge block has a through hole structure corresponding to the shape of the knob, the knob is inserted into the hole of the wedge block, and the connection of the single-wire rod force mechanism and the clamping mechanism is realized.

5. A rapid clamping bench vice according to claim 3, wherein, The clamping mechanism also includes a guide sliding block, the guide sliding block can limit the axial movement of the supporting block, so that the supporting block can only move horizontally to perform the clamping action; the guide sliding block has a limiting structure, when the two supporting blocks move away from each other to be clamped with the guide rail, the supporting blocks can be stopped from continuing to move outward through the constraint of the limiting structure, thereby preventing the guide rail from being deformed due to the side pressure of the supporting blocks; a compression spring is installed between the supporting block and the limiting structure, so that the supporting block and the wedge block are always in contact, and the supporting block and the guide rail can be out of contact when the clamping mechanism is not clamped with the guide rail.

6. A rapid clamping torque wrench according to claim 1, wherein The piston has a blind hole with a diameter larger than that of the plunger head and a depth greater than the stroke of the plunger, so that the piston can abut against the right end surface of the cylinder body to form an oil-free cavity structure.

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