A hydraulic clamp

Abstract

A hydraulic clamping fixture includes a lower body, the lower body is formed with an oil cylinder, the bottom is provided with an oil channel, and the oil channel is connected to the upper part of the oil cylinder; a clamp body, the clamp body is connected to the upper part of the lower body; an upper body, the upper body is connected to the upper part of the clamp body, and a concave cavity is provided on the upper part of the upper body; a driving member, the lower end of the driving member is placed in the oil cylinder and moves in the oil cylinder, and the upper end of the driving member is respectively slidably connected to the clamp body and the upper body; an elastic member, the elastic member is arranged at the lower end of the driving member; a chuck, the chuck is placed in concave cavity one and moves in concave cavity one; the chuck is fixedly connected to the driving member; a top, the top is penetrated at the bottom of the chuck, and can be detachably connected to the upper body. The utility model utilizes hydraulic power to drive a piston, and the piston drives the chuck to move, so as to realize the clamping and fixing of a workpiece, and the spring is used to release the stored energy to realize the loosening of the workpiece, without the need for additional positioning, thereby improving production efficiency, and the clamping and positioning accuracy is high, which can ensure the consistency of processing quality.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing tools, in particular to a hydraulic clamping fixture. Background Art

[0002] In the processing of cylindrical gears, fixtures are an important factor affecting product quality and production efficiency. According to the gear structure, production process and precision requirements, special tooling fixtures such as gear hobbing, gear shaping, grinding, fine turning and gear grinding need to be designed in the production preparation stage. The production cycle of these fixtures is generally 6-8 weeks. In order to improve production efficiency, process technicians often design fixtures in advance, especially gear hobbing fixtures and gear shaping fixtures before heat treatment, which must be installed and debugged before the production blank is fine turned. Otherwise, it will affect the process handover and even the production rhythm of the production line.

[0003] Traditional gear hobbing fixtures and gear shaping fixtures are mostly pull rod type, consisting of a clamping body, mandrel, center, expansion sleeve, pull rod, pull sleeve and other structures. The clamping and loosening of the workpiece must be done manually, and repeated positioning and accuracy are required. The production efficiency is low, the positioning accuracy is low, and the consistency of processing quality cannot be guaranteed. Utility Model Content

[0004] The utility model aims to provide a hydraulic clamping fixture, which solves the problem that the clamping and loosening of workpieces of existing gear hobbing fixtures and gear shaping fixtures need to be manually operated and require repeated positioning and accurate finding.

[0005] The utility model provides the following solutions:

[0006] A hydraulic clamping fixture, comprising:

[0007] A lower body, wherein the lower body is formed with an oil cylinder, and an oil channel is provided at the bottom, and the oil channel is communicated with the upper part of the oil cylinder;

[0008] A clamp body, the clamp body being connected to the upper part of the lower body;

[0009] An upper body, the upper body is connected to the upper part of the clamp body, and a concave cavity 1 is provided on the upper part of the upper body;

[0010] A driving member, wherein the lower end of the driving member is placed in the oil cylinder and moves in the oil cylinder, and the upper end of the driving member is slidably connected to the clamp body and the upper body respectively;

[0011] An elastic member, the elastic member being arranged at the lower end of the driving member;

[0012] A chuck, the chuck is placed in the first concave cavity and moves in the first concave cavity; the chuck is fixedly connected to the driving member;

[0013] The top tip is passed through the bottom of the chuck and is detachably connected to the upper body.

[0014] Preferably, the first concave cavity is in a cone shape which is wider at the top and narrower at the bottom.

[0015] Preferably, the driving member is a piston, and the piston reciprocates in the oil cylinder, the clamp body and the upper body.

[0016] Preferably, a second concave cavity is provided at the lower portion of the upper body, and the upper end of the piston is placed in the second concave cavity.

[0017] Preferably, the upper body is provided with a guide hole penetrating the first cavity and the second cavity;

[0018] The upper end of the piston is provided with a first mounting hole at a position corresponding to the guide hole, and the lower part of the chuck is provided with a second mounting hole at a position corresponding to the guide hole. Bolts pass through the guide holes to connect the first mounting hole with the second mounting hole.

[0019] Preferably, a channel is provided in the middle of the clamp body, and the piston is connected to the clamp body through the channel.

[0020] Preferably, a screw is provided at the lower end of the top point, and a mounting hole is provided on the upper body for cooperation with the screw.

[0021] Preferably, a notch is provided on the side of the upper body, and the notch is communicated with a bottom of the cavity; and a through hole is provided at the bottom of the chuck.

[0022] Preferably, the clamp body is connected to the lower body and the upper body by bolts.

[0023] Preferably, the clamping portion of the chuck is made of elastic material.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1. The hydraulic clamp provided by the utility model utilizes hydraulic power to drive the piston, which drives the chuck to move, thereby clamping and fixing the workpiece, and utilizing the spring to release the stored energy to loosen the workpiece. No additional positioning is required, thereby improving production efficiency, and the clamping and positioning accuracy is high, which can ensure the consistency of processing quality.

[0026] 2. The hydraulic clamp provided by the utility model realizes loosening and tightening by driving the clamp head through the piston. Compared with the commonly used tie rod clamp, the piston replaces the core shaft, tie rod, expansion sleeve and other components, and the structure is simple.

[0027] 3. The hydraulic clamping fixture provided by the utility model has a detachable connection between the center and the fixture, and the height can be controlled by adjusting the length of the insertion installation hole, so that it is suitable for processing different parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the hydraulic clamp according to an embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of a hydraulic clamp for clamping a workpiece according to an embodiment of the utility model.

[0031] Among them: 1-lower body; 1-1-oil cylinder; 1-2-oil channel;

[0032] 2-Clamping concrete;

[0033] 3-upper body; 3-1-concave cavity 1; 3-2-concave cavity 2; 3-4-guide hole; 3-5-notch

[0034] 4-Piston;

[0035] 5- elastic member;

[0036] 6-chuck, 6-1-through hole;

[0037] 7-top; 7-1-screw;

[0038] 8-Bolts. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0041] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0043] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0044] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0045] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0046] See also Figure 1 A hydraulic clamping clamp provided in an embodiment of the present application includes: a lower body 1, the lower body 1 is formed with an oil cylinder 1-1, and an oil channel 1-2 is provided at the bottom, and the oil channel 1-2 is connected to the upper part of the oil cylinder 1-1; a clamp body 2, the clamp body 2 is connected to the upper part of the lower body 1; an upper body 3, the upper body 3 is connected to the upper part of the clamp body 2, and a concave cavity 3-1 is provided at the upper part of the upper body 3; a driving member, the lower end of the driving member is placed in the oil cylinder 1-1 and moves in the oil cylinder 1-1, and the upper end of the driving member is slidably connected to the clamp body 2 and the upper body 3 respectively; an elastic member 5 is sleeved on the lower end of the piston 4; a chuck 6, the chuck 6 is placed in the concave cavity 3-1 and moves in the concave cavity 3-1; the chuck 6 is fixedly connected to the driving member; a top 7, the top 7 is penetrated at the bottom of the chuck 6, and can be detachably connected to the upper body 3.

[0047] By adopting the above technical scheme, the chuck 6 is used to clamp and position the shaft diameter of the workpiece to be processed, and the lower body 1 is fixed to the processing table of the gear hobbing machine or the gear shaping machine by bolts, and the oil channel 1-2 is connected to the hydraulic oil port of the gear hobbing machine or the gear shaping machine, so that the hydraulic oil can enter the upper part of the cylinder 1-1. Since the lower end of the driving member is placed in the cylinder 1-1, the driving member forms an oil seal at the upper part of the cylinder 1-1, and the hydraulic oil pushes the driving member to move downward. Since the chuck 6 is fixedly connected to the driving member, the driving member drives the chuck 6 to move downward, so that the chuck clamps the shaft diameter of the workpiece, and the driving member compresses the elastic member 5 at the bottom of the driving member while moving downward, so that the elastic member 5 stores energy; after the parts are processed, the hydraulic oil is released to flow out of the cylinder 1-1, the elastic member 5 releases energy, pushes the driving member to move upward, and the chuck 6 moves upward synchronously to release the workpiece.

[0048] The bottom of the chuck 6 is provided with an opening for the tip 7 to pass through, and the tip 7 passes through the opening and is connected to the upper body 3. For shaft-like workpieces, if the clamping force of the chuck 6 on the workpiece is insufficient, the workpiece will move in the axial direction, making the positioning inaccurate. Therefore, it is necessary to position and support the shaft through the tip 7. The tip is set to be detachably connected to be suitable for shaft-like or non-shaft-like workpieces.

[0049] Preferably, the concave cavity 3 - 1 is a tapered shape that is wide at the top and narrow at the bottom. When the chuck 6 moves from top to bottom in the concave cavity 3 - 1 driven by the driving member, the distance between the clamping parts becomes shorter, and the workpiece is clamped in the chuck 6 .

[0050] Preferably, the driving member is a piston 4 , and the piston 4 reciprocates in the oil cylinder 1 - 1 , the clamp body 2 and the upper body 3 .

[0051] Further preferably, a second concave cavity 3-2 is provided at the lower part of the upper body 3, and the upper end of the piston 4 is placed in the second concave cavity 3-2. The piston 4 and the upper body 3 are connected through the second concave cavity 3-2, and a space for the piston 4 to reciprocate is provided.

[0052] Preferably, the upper body 3 is provided with a guide hole 3-4 passing through the concave cavity 1 3-1 and the concave cavity 2 3-2; the upper end of the piston 4 is provided with a first mounting hole at a position corresponding to the guide hole 3-4, and the lower part of the chuck 6 is provided with a second mounting hole at a position corresponding to the guide hole 3-4, and the bolt 8 passes through the guide hole 3-4 to connect the first mounting hole with the second mounting hole.

[0053] The bolt 8 passes through the guide hole 3-4 to fix the piston 4 and the chuck 6, and can slide in the guide hole 3-4 to ensure that the piston 4 and the chuck 6 can reciprocate up and down when the upper body 3 is fixed.

[0054] Preferably, a channel is provided in the middle of the clamp body 2, and the piston 4 is connected to the clamp body 2 through the channel. The clamp body 2 is a semi-cylindrical body with two grooves in the middle that pass through the upper and lower ends of the clamp body 2. The two pieces are connected to form a channel, and the piston 4 reciprocates in the channel.

[0055] Preferably, a screw rod 7-1 is provided at the lower end of the tip 7, and the upper body 3 is provided with a mounting hole that cooperates with the screw rod 7-1. The screw rod 7-1 is inserted into the mounting hole, and the screw rod is fixed by a nut, so that the tip 7 is fixed on the upper body 3. The length of the screw rod 7-1 inserted into the mounting hole can be determined according to the size of the workpiece and the processing position, so as to be suitable for workpieces of different sizes.

[0056] In some optional embodiments, a notch 3-5 is provided on the side of the upper body 3, and the notch 3-5 is connected to the bottom of the cavity 1 3-1; a through hole 6-1 is provided at the bottom of the chuck 6. When the workpiece is processed normally, the cut chips fall outside the chuck, but when the tip 6 is disassembled or the workpiece is taken, the chips occasionally fall into the chuck 6, and the chips enter the cavity 1 3-1 through the through hole 6-1 provided at the bottom of the chuck 6, and the chips are discharged out of the fixture through the notch 3-5 connected to the bottom of the cavity 1 3-1.

[0057] Preferably, the clamp body 2 is connected to the lower body 1 and the upper body 3 by bolts.

[0058] Preferably, the clamping portion of the chuck 6 is made of elastic material, which can protect the outer surface of the workpiece under high-intensity processing conditions.

[0059] The assembly steps of the hydraulic clamping clamp described in this embodiment are as follows: fix the lower body 1 on the processing table of the gear hobbing machine or the gear shaping machine by bolts, connect the oil channel 1-2 with the hydraulic oil port of the gear hobbing machine or the gear shaping machine, sleeve the spring 5 on the lower end of the piston 4, place the piston 4 with the spring 5 in the oil cylinder 1-1, so that the upper surface of the lower end of the piston 4 forms an oil seal with the oil cylinder 1-1; before installing the upper body 3, first determine the depth of the screw 7-1 inserted into the mounting hole according to the workpiece size and processing position, and fix the top 7 with the nut; after the top 7 is fixed, match the position of the concave cavity 2 3-2 of the upper body 3 with the upper end of the piston 4, and insert the bolt 8 into the first positioning hole, the guide hole 3-4 and the second positioning hole in sequence to fix the piston 4 with the chuck 6; finally, wrap the outer diameter in the middle of the piston with two clamp bodies 2, and connect the clamp body 2 with the lower body 1 and the upper body 3 by bolts respectively; that is, the assembly of the entire clamp is completed.

[0060] The working process of the hydraulic clamp described in this embodiment is as follows: Figure 2, assemble the various parts of the fixture according to the above assembly steps, place the workpiece with the part to be processed facing upward, operate the machine panel, control the hydraulic pump to press the hydraulic oil into the cylinder 1-2, thereby pushing the piston 4 downward, the piston compresses the spring 5 downward, the piston 4 drives the chuck 6 to move downward, the chuck 6 is tightened, clamps the workpiece to locate the shaft diameter, and the top 7 presses the center hole of the workpiece for auxiliary support, and then the processing can be carried out. After the processing is completed, operate the machine panel, control the hydraulic pump to stop working, the hydraulic oil flows back to the oil tank, the elastic potential energy accumulated in the spring 5 is released, and the rebound pushes the piston 4 upward to return to its original position, and the chuck 6 moves upward synchronously to release the workpiece. At this time, the workpiece can be removed. If you need to continue processing, you can clamp the workpiece again according to the above method.

[0061] In summary, the hydraulic clamp provided in this embodiment uses hydraulic power to drive the piston, and the piston drives the chuck to move, so as to clamp and fix the workpiece, and release the stored energy of the spring to loosen the workpiece, without the need for additional positioning, thereby improving production efficiency, and the clamping positioning accuracy is high, which can ensure the consistency of processing quality. The chuck is driven by the piston to achieve loosening and tightening. Compared with the commonly used tie rod type clamp, the piston replaces the core shaft, tie rod, expansion sleeve and other components, and the structure is simple.

[0062] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hydraulic clamp, characterized in that: include: A lower body (1), wherein the lower body (1) is formed with an oil cylinder (1-1), an oil channel (1-2) is provided at the bottom, and the oil channel (1-2) is communicated with the upper part of the oil cylinder (1-1); A clamp body (2), the clamp body (2) being connected above the lower body (1); An upper body (3), the upper body (3) is connected to the upper part of the clamp body (2), and a concave cavity (3-1) is provided on the upper part of the upper body (3); A driving member, wherein the lower end of the driving member is placed in the oil cylinder (1-1) and moves in the oil cylinder (1-1), and the upper end of the driving member is slidably connected to the clamp body (2) and the upper body (3); An elastic member (5), the elastic member (5) being arranged at the lower end of the driving member; A chuck (6), the chuck (6) is placed in the concave cavity (3-1) and moves in the concave cavity (3-1); the chuck (6) is fixedly connected to the driving member; A tip (7), the tip (7) is passed through the bottom of the chuck (6) and is detachably connected to the upper body (3).

2. The hydraulic clamp according to claim 1, characterized in that: The concave cavity 1 (3-1) is in a cone shape that is wide at the top and narrow at the bottom.

3. The hydraulic clamp according to claim 1, characterized in that: The driving member is a piston (4), and the piston (4) reciprocates in the oil cylinder (1-1), the clamp body (2) and the upper body (3).

4. The hydraulic clamp according to claim 3, characterized in that: A second concave cavity (3-2) is provided at the lower part of the upper body (3), and the upper end of the piston (4) is placed in the second concave cavity (3-2).

5. The hydraulic clamp according to claim 4, characterized in that: The upper body (3) is provided with a guide hole (3-4) penetrating the first concave cavity (3-1) and the second concave cavity (3-2); The upper end of the piston (4) is provided with a first mounting hole at a position corresponding to the guide hole (3-4), the lower part of the chuck (6) is provided with a second mounting hole at a position corresponding to the guide hole (3-4), and a bolt (8) passes through the guide hole (3-4) to connect the first mounting hole with the second mounting hole.

6. The hydraulic clamp according to claim 3, characterized in that: A channel is provided in the middle of the clamp body (2), and the piston (4) is connected to the clamp body (2) through the channel.

7. The hydraulic clamp according to claim 1, characterized in that: A screw rod (7-1) is provided at the lower end of the top tip (7), and a mounting hole that cooperates with the screw rod (7-1) is provided on the upper body (3).

8. The hydraulic clamp according to claim 1, characterized in that: A notch (3-5) is provided on the side of the upper body (3), and the notch (3-5) is communicated with the bottom of the first concave cavity (3-1); a through hole (6-1) is provided at the bottom of the clamp (6).

9. The hydraulic clamp according to claim 1, characterized in that: The clamp body (2) is connected to the lower body (1) and the upper body (3) via bolts.

10. The hydraulic clamp according to claim 1, characterized in that: The clamping part of the clamp (6) is made of elastic material.

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