Pull-down facing centripetal hydraulic vice

Abstract

The utility model discloses a pull-down facing centripetal hydraulic vice which comprises a base and at least one clamping assembly. The clamping assembly is arranged on the base; each clamping assembly comprises a clamp body, an inclined pull rod, a jaw, a workpiece positioning plate, a vertical pull rod and a hydraulic cylinder; a vertical guide groove is formed in the center of the bottom of the clamp body, inclined guide grooves are formed in the two sides of the top of the clamp body, and the two inclined guide grooves are symmetrically arranged relative to the center of the vertical guide groove and open in an inverted splayed shape. The two inclined pull rods are arranged, the vertical pull rod is used for driving the two inclined pull rods to move up and down in the inclined direction of the two inclined guide grooves correspondingly, and therefore in the workpiece clamping process, the two jaws can pull a workpiece downwards to be attached to the surface of the workpiece positioning plate and then clamp the workpiece; therefore, the bottom face of the workpiece is completely attached to the reference face to guarantee high precision of flatness of the workpiece, high-precision centering and high-precision parallelism clamping of the workpiece are achieved, the machined workpiece meets the high-precision requirement, and the quality of the machined workpiece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the vice field technology especially is a kind of down pull paste face centering hydraulic vice. BACKGROUND

[0002] Hydraulic vice is also called hydraulic chuck or hydraulic chuck, and it is a tool clamp using hydraulic principle to clamp and release action. It is mainly used in the field of mechanical processing, especially in lathe, milling machine, grinding machine and other machine tools, to firmly clamp workpiece, so as to carry out various cutting, grinding or drilling and other processing operations. The working principle of hydraulic vice is based on Pascal's principle, that is, the pressure on the closed liquid can be transmitted in all directions without changing size. When high-pressure oil is injected into the hydraulic cylinder of hydraulic vice, the piston in the hydraulic cylinder will move under the action of pressure, and then push the clamping part of the jaw to clamp the workpiece. Conversely, when the pressure in the hydraulic cylinder is released, the jaw will automatically loosen and release the workpiece. In the process of mechanical processing, the use of hydraulic vice can greatly improve production efficiency, reduce the labor intensity of operators, and at the same time ensure the processing quality. Therefore, it is widely used in automobile manufacturing, aerospace, mechanical manufacturing and other industries

[0003] The main structure of the current hydraulic vice includes a base and at least one clamping assembly. The clamping assembly is arranged on the base, and the clamping assembly is composed of two translation blocks, two jaw pieces, a pull-down block and a hydraulic cylinder. The pull-down block is driven by the hydraulic cylinder to move downward, and then the two translation blocks are driven by the pull-down block to move horizontally close, so that the two jaw pieces move horizontally close to clamp the workpiece. Since the workpiece is clamped by parallel movement, the workpiece is prone to warping during movement. In high-precision machining, warping of the workpiece during clamping will directly lead to unqualified parallel precision of the workpiece, thereby causing serious adverse effects on high-precision machining. Therefore, it is necessary to improve the current hydraulic vice. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a kind of down pull paste face centering hydraulic vice, which can effectively solve the problem that the workpiece is prone to warping during clamping in the existing hydraulic vice.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The application discloses a hydraulic vice with a pull-down and a veneer, which comprises a base and at least one clamping assembly; the clamping assembly is arranged on the base; each clamping assembly comprises a vice body, an oblique pull rod, a vice mouth, a workpiece positioning plate, a vertical pull rod and a hydraulic cylinder; a vertical guide groove is formed in the center of the bottom of the vice body; oblique guide grooves are formed in the top of the vice body; the two oblique guide grooves are symmetrically arranged with respect to the center of the vertical guide groove and are in the shape of an inverted eight; the two oblique guide grooves are in communication with the vertical guide groove; the oblique pull rod is provided with two oblique pull rods which are symmetrically arranged and are obliquely movable up and down along the oblique guide grooves; the vice mouth is provided with two vice mouths which are symmetrically arranged and are fixed on the top of the oblique pull rod; the two vice mouths form a clamping groove; the workpiece positioning plate is arranged on the top of the vice body and is located in the clamping groove; the vertical pull rod is arranged in the vertical guide groove and is connected with the oblique pull rod to drive the oblique pull rod to move up and down synchronously; and the hydraulic cylinder is arranged in the base and drives the vertical pull rod to move up and down.

[0007] As a preferred scheme, the top surface of the vice body is concavely provided with two inclined surface cavities, the two oblique guide grooves are further concavely formed at the bottom surface of the two inclined surface cavities, the two vice mouths are matched with the two inclined surface cavities, and the outer wall of each vice mouth is in inclined surface sliding fit with the inner wall of the inclined surface cavity, so that the vice mouth moves more stably and reliably.

[0008] As a preferred scheme, the inner circumferential wall of the inclined surface cavity is concavely provided with a fixing groove, a sealing element is fixed in the fixing groove, and the sealing element is in sliding sealing fit with the outer wall of the vice mouth, so as to realize dustproof sealing and prevent dust from entering the oblique guide groove.

[0009] As a preferred scheme, the vice mouth comprises a vice mouth seat and a vice mouth piece, the vice mouth seat is fixed on the top of the oblique pull rod through a first screw, and the vice mouth piece is quickly replaceably fixed on the vice mouth seat through a second screw, the vice mouth pieces of the two vice mouths form the clamping groove, and the structure is simple and the use is flexible and convenient.

[0010] As a preferred scheme, the inner side surface of the oblique pull rod is concavely provided with a clamping groove, and the upper end outer side surface of the vertical pull rod is outwardly protrudingly provided with a clamping block which is in clamping fit and connection with the clamping groove, and the structure is simple and the assembly is easy.

[0011] As a preferred scheme, the base is concavely provided with a recess hole, a reset spring is embedded in the recess hole, the reset spring abuts against the bottom of the oblique pull rod and promotes the oblique pull rod to move obliquely upward to reset, so that the oblique pull rod is quickly reset.

[0012] As a preferred embodiment, the outer side of the clamp body is provided with a first mounting hole, which is connected to the inclined guide groove. A stroke sensor is installed in the first mounting hole and extends into the inclined guide groove to detect the position of the inclined pull rod.

[0013] As a preferred embodiment, the outer side of the clamp body is provided with a second mounting hole, which connects to the inclined guide groove. A grease nipple is installed in the second mounting hole to add grease into the inclined guide groove to increase lubrication.

[0014] As a preferred embodiment, the base has a mounting cavity, the hydraulic cylinder is fixed in the mounting cavity, the hydraulic rod has a piston rod that extends upward, and the upper and lower end faces of the vertical tie rod have through holes. A height-equal screw passes through the through holes from top to bottom and is fixedly connected to the upper end of the piston rod. The structure is simple and easy to assemble.

[0015] As a preferred embodiment, the clamping assembly is detachably and adjustable in installation direction on the base. The installation direction of the clamping assembly can be adjusted as needed, and it can be installed horizontally or vertically, without limitation.

[0016] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0017] By setting two oblique tie rods, the vertical tie rod drives the two oblique tie rods to move obliquely up and down along the two oblique guide grooves. During the clamping process, the two jaws pull the workpiece down and stick it to the surface of the workpiece positioning plate before clamping it. This ensures that the bottom surface of the workpiece is completely in contact with the reference surface, thus guaranteeing high precision in flatness. This achieves high-precision centering and high-precision parallelism clamping of the workpiece, allowing the machined workpiece to meet high precision requirements and improving the quality of the machined workpiece.

[0018] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is an assembled three-dimensional schematic diagram of the first preferred embodiment of this utility model;

[0020] Figure 2 This is a three-dimensional assembly schematic diagram of the first preferred embodiment of this utility model from another angle;

[0021] Figure 3 This is an exploded view of the first preferred embodiment of the present utility model;

[0022] Figure 4 This is a cross-sectional view of the first preferred embodiment of the present invention;

[0023] Figure 5 yes Figure 4 Enlarged view of position A in the middle;

[0024] Figure 6 This is a three-dimensional assembly diagram of the second preferred embodiment of the present invention.

[0025] Explanation of reference numerals in the attached diagram:

[0026] 10. Base 11. Main body

[0027] 12. Base plate 13. Oil guide plate

[0028] 14. Air pipe connector 15. Oil pipe connector

[0029] 101. Mounting cavity; 102. Recessed hole

[0030] 20. Clamping assembly 21. Grip body

[0031] 211. Vertical guide groove; 212. Angled guide groove

[0032] 213. Inclined concave cavity; 214. Fixing groove

[0033] 215. First mounting hole; 216. Second mounting hole

[0034] 217. Positioning post; 218. Dust cover

[0035] 22. Diagonal tie rod; 221. Slot

[0036] 23. Jaws 231. Jaw base

[0037] 232. Jaw fittings; 233. First screw

[0038] 234. Second screw; 24. Workpiece positioning plate

[0039] 241. Positioning notch; 242. Third screw

[0040] 25. Vertical tie rod; 251. Locking block

[0041] 252, Through hole; 253, Snap ring

[0042] 254. Anti-jacking bearing pad; 26. Hydraulic cylinder

[0043] 261. Piston rod; 262. Equal height screw

[0044] 27. Return spring 28. Universal positioner

[0045] 29. Bolts 201. Seals

[0046] 202. Stroke sensor; 203. Grease fitting.

[0047] 204, Gap 30, Workpiece. Detailed Implementation

[0048] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of the first preferred embodiment of the present invention, including a base 10 and at least one clamping component 20.

[0049] The base 10 has a mounting cavity 101 and a recessed hole 102. Specifically, the base 10 includes a main body 11, a base plate 12, and an oil guide plate 13. The mounting cavity 101 is located on the main body 11. One end of the main body 11 is provided with an air pipe connector 14 and an oil pipe connector 15. The base plate 12 is fixed to the bottom of the main body 11 and covers the bottom opening of the mounting cavity 101. The oil guide plate 13 is fixed to the top of the main body 11 and has multiple pipes (not shown in the figure). The air pipe connector 14 and the oil pipe connector 15 are respectively connected to the corresponding pipes. The recessed hole 102 is formed by recessing the upper surface of the oil guide plate 13.

[0050] The clamping assembly 20 is mounted on the base 10; each clamping assembly 20 includes a clamp body 21, a diagonal pull rod 22, a jaw 23, a workpiece positioning plate 24, a vertical pull rod 25, and a hydraulic cylinder 26. Specifically:

[0051] The clamp body 21 has a vertical guide groove 211 at its bottom center and oblique guide grooves 212 on both sides of its top. The two oblique guide grooves 212 are symmetrically arranged relative to the center of the vertical guide groove 211 and open in an inverted V-shape. Both oblique guide grooves 212 are connected to the vertical guide groove 211. In this embodiment, the top surface of the clamp body 21 has two oblique cavities 213. The two oblique guide grooves 212 are further recessed at the bottom surface of the two oblique cavities 213. Furthermore, the inner circumferential sidewall of the oblique cavity 213 has a fixing groove 214. A sealing element 201 is fixed in the fixing groove 214 to achieve a dustproof seal and prevent external dust from entering the oblique guide grooves 212. Furthermore, the outer side of the clamp body 21 has a first mounting hole 215, which connects to the inclined guide groove 212. A stroke sensor 202 is installed in the first mounting hole 215, extending into the inclined guide groove 212 to detect the position of the inclined pull rod 22. Additionally, the outer side of the clamp body 21 has a second mounting hole 216, which connects to the inclined guide groove 212. A grease nipple 203 is installed in the second mounting hole 216 to add grease to the inclined guide groove 212 for increased lubrication. Furthermore, a positioning post 217 protrudes from the top surface of the clamp body 21, and a dust cover 218 is also provided on the clamp body 21.

[0052] There are two inclined tie rods 22, which are respectively disposed in two inclined guide grooves 212 and can move obliquely up and down. The two inclined tie rods 22 are symmetrically arranged and move obliquely up and down along the two inclined guide grooves 212. In this embodiment, the inner side of the inclined tie rod 22 is provided with a groove 221.

[0053] There are two jaws 23, symmetrically arranged and fixed to the tops of the two inclined pull rods 22, with a clamping groove 204 formed between them. In this embodiment, the two jaws 23 are adapted to the two inclined cavities 213, and the outer wall of each jaw 23 and the inner wall of the inclined cavity 213 are in a sliding fit, making the movement of the jaws 23 more stable and reliable. The sealing element 201 is in a sliding sealing fit with the outer wall of the jaws 23 to achieve dust prevention, effectively preventing dust from entering the vertical guide groove 211 and the inclined guide groove 212. Furthermore, specifically, the jaw 23 includes a jaw base 231 and a jaw member 232. The jaw base 231 is fixed to the top of the inclined pull rod 22 by a first screw 233, and the jaw member 232 is quickly and easily installed on the jaw base 231 by a second screw 234. The aforementioned clamping groove 204 is formed between the jaw members 232 of the two jaws 23, so as to replace the appropriate jaw member 232 according to the size and specifications of the workpiece 30, thereby improving the versatility of the product.

[0054] The workpiece positioning plate 24 is disposed on the top of the clamp body 21 and located in the clamping groove 204. In this embodiment, both ends of the workpiece positioning plate 24 are provided with positioning notches 241. The positioning notches 241 are inserted and positioned in conjunction with the positioning pins 217. The workpiece positioning plate 24 is fixedly connected to the clamp body 21 by a plurality of third screws 242.

[0055] The vertical tie rod 25 is movably mounted vertically in the vertical guide groove 211. The vertical tie rod 25 is connected to two diagonal tie rods 22 and drives the two diagonal tie rods 22 to move diagonally up and down synchronously. In this embodiment, a locking block 251 protrudes outward from the outer surface of the upper end of the vertical tie rod 25. Two locking blocks 251 are symmetrically arranged in a mirror image, and the locking blocks 251 are engaged with the locking groove 221. Furthermore, a through hole 252 is formed through the upper and lower end faces of the vertical tie rod 25. The aforementioned dust cover 218 covers the through hole 252 directly above it, and a counter-pressure washer 254 is installed at the upper end of the through hole 252 via a retaining ring 253.

[0056] The hydraulic cylinder 26 is disposed within the base 10 and drives the vertical tie rod 25 to move vertically up and down. In this embodiment, the hydraulic cylinder 26 is connected to the corresponding pipeline on the oil guide plate 13. The hydraulic cylinder 26 is fixed in the mounting cavity 101. The hydraulic rod 26 has a piston rod 261 that extends upward. A leveling screw 262 passes through the through hole 252 from top to bottom and is fixedly connected to the upper end of the piston rod 261. The leveling screw 262 abuts against the anti-top force-bearing pad 254.

[0057] Furthermore, a return spring 27 is embedded in the recess 102. The return spring 27 abuts against the bottom of the inclined pull rod 22 and causes the inclined pull rod 22 to move obliquely upward to return to its original position, so that the inclined pull rod 22 can return to its original position quickly and accurately, thus improving efficiency.

[0058] In addition, a universal positioner 28 is provided on the clamp body 21. The universal positioner 28 is located on the outer side of one end of the clamping groove 204. The universal positioner 28 is used to accurately position the workpiece 30.

[0059] The clamping assembly 20 is detachably and can be adjusted in installation direction on the base 10. Specifically, the clamp body 21 is detachably connected to the base 10 by multiple bolts 29. The jaws 23 are arranged symmetrically on the left and right to clamp and fix the workpiece 30. There are two clamping assemblies 20 arranged on the left and right, and the two clamping assemblies 20 are separated on the left and right and fixed on the base 10 to achieve dual-station clamping. This allows the product to clamp two workpieces 30 at the same time without limitation.

[0060] The working principle of this embodiment is described in detail below:

[0061] First, the workpiece 30 is placed on the workpiece positioning plate 24. Then, hydraulic oil enters from the oil pipe joint 15 and enters the hydraulic cylinder 26 through the oil supply hole of the oil guide plate 13, causing the piston rod 261 to move downward and pull the leveling screw 262 downward. The leveling screw 262 is pulled by the downward force to move the vertical tie rod 25 vertically downward. Then, the vertical tie rod 25 drives the two oblique tie rods 22 to move obliquely downward along the two oblique guide grooves 212 respectively. Under the action of the oblique tie rods 22 and the oblique guide grooves 212, the oblique surfaces are aligned. The two jaws 23 move obliquely downward with the two oblique tie rods 22, so that the two jaws 232 symmetrically clamp the workpiece 30 towards the center of the clamping 204. While the two jaws 232 are clamping the workpiece 30, they will move obliquely downward, causing the workpiece 30 to maintain a downward trend, so that the bottom surface (reference surface) of the workpiece 30 is completely in contact with the surface of the workpiece positioning plate 24.

[0062] When it is necessary to remove workpiece 30, the oil pipe is first depressurized. Under the action of compressed air through the air pipe joint 14, the piston rod 261 pushes upward, thereby pushing the equalizing screw 262 upward. Then, the equalizing screw 262 drives the vertical pull rod 25 to move upward. Next, the vertical pull rod 25 drives the two oblique pull rods 22 to move obliquely upward in a figure-eight shape. The two jaws 23 release workpiece 30 as the two oblique pull rods 22 move obliquely upward.

[0063] Please refer to Figure 6 As shown, it illustrates the specific structure of the second preferred embodiment of the present invention. The specific structure of this embodiment is basically the same as that of the aforementioned first preferred embodiment, except that:

[0064] In this embodiment, the jaws 23 are arranged symmetrically to clamp and fix the workpiece 30, thereby achieving fixation after the workpiece 30 is rotated 90 degrees. Thus, the installation direction of the clamping assembly 20 can be adjusted as needed, and it can be installed horizontally or vertically, without limitation.

[0065] The working principle of this embodiment is basically the same as that of the first preferred embodiment described above, and the working principle of this embodiment will not be described in detail here.

[0066] The key design feature of this invention is that by setting two oblique tie rods, the vertical tie rod drives the two oblique tie rods to move obliquely up and down along the two oblique guide grooves. During the clamping process, the two jaws pull the workpiece down and adhere it to the surface of the workpiece positioning plate before clamping it. This ensures that the bottom surface of the workpiece is completely in contact with the reference surface, thereby guaranteeing high precision in flatness. This achieves high-precision centering and high-precision parallelism clamping of the workpiece, allowing the processed workpiece to meet high precision requirements and improving the quality of the processed workpiece.

[0067] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A pull-down, face-to-face hydraulic vise, comprising a base and at least one clamping assembly; the clamping assembly is disposed on the base; characterized in that: Each clamping assembly includes a clamp body, diagonal pull rods, jaws, a workpiece positioning plate, a vertical pull rod, and a hydraulic cylinder. The clamp body has a vertical guide groove at its bottom center and diagonal guide grooves on both sides of its top. The two diagonal guide grooves are symmetrically arranged relative to the center of the vertical guide groove and open in an inverted V-shape, both communicating with the vertical guide groove. There are two diagonal pull rods, each movably movable up and down within the two diagonal guide grooves, symmetrically arranged and moving diagonally up and down along the two diagonal guide grooves. There are two jaws, symmetrically arranged and fixed to the top of the two diagonal pull rods, forming a clamping groove between them. The workpiece positioning plate is located on the top of the clamp body within the clamping groove. The vertical pull rod is movably movable up and down within the vertical guide groove, connected to the two diagonal pull rods and driving them to move synchronously up and down diagonally. The hydraulic cylinder is located within the base and drives the vertical pull rod to move vertically up and down.

2. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The top surface of the clamp body is recessed with two inclined cavities. The two inclined guide grooves are further recessed at the bottom surface of the two inclined cavities. The two jaws are adapted to the two inclined cavities. The outer wall of each jaw and the inner wall of the inclined cavity are in inclined sliding fit.

3. The pull-down, face-to-face hydraulic vise according to claim 2, characterized in that: The inner circumferential sidewall of the inclined cavity is provided with a fixing groove, in which a sealing element is fixed, and the sealing element slides and seals with the outer wall of the jaw.

4. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The jaws include a jaw base and jaw components. The jaw base is fixed to the top of the inclined pull rod by a first screw, and the jaw components are quickly and easily installed on the jaw base by a second screw. The aforementioned clamping groove is formed between the jaw components of the two jaws.

5. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The inner side of the diagonal tie rod is recessed with a slot, and correspondingly, the outer side of the upper end of the vertical tie rod is protruding with a block, which engages with the slot.

6. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The base has a recessed hole, in which a return spring is embedded. The return spring abuts against the bottom of the inclined tie rod and causes the inclined tie rod to move obliquely upward to return to its original position.

7. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The outer side of the clamp body is provided with a first mounting hole, which is connected to the inclined guide groove. A stroke sensor is installed in the first mounting hole and extends into the inclined guide groove.

8. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The outer side of the clamp body is provided with a second mounting hole, which is connected to the inclined guide groove, and a grease fitting is installed in the second mounting hole.

9. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The base has a mounting cavity, in which the hydraulic cylinder is fixed. The hydraulic rod has a piston rod that extends upward. The upper and lower end faces of the vertical tie rod have through holes. A height-equal screw passes through the through holes from top to bottom and is fixedly connected to the upper end of the piston rod.

10. The pull-down, face-to-face hydraulic vise according to claim 1, characterized in that: The clamping assembly is detachably mounted on the base and its installation direction can be adjusted.

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