Center structure

Abstract

The utility model provides a center structure, which belongs to the field of machining auxiliary equipment and comprises a tool holder, a center, an elastic deformation part, a fixing part and a limiting component. The elastic deformation piece is arranged in the mounting hole, part of the tip structure extends into the mounting hole, the tip is in contact with the elastic deformation piece, and the end, away from the tool holder, of the tip is a positioning end used for positioning an external connection structure; the limiting assembly is connected with the tip and used for restraining the tip to move relative to the tool holder along a specific path. The fixing piece is used for penetrating through the tip and the elastic deformation piece to be connected with the tool holder. And the tip is umbrella-shaped. According to the center structure provided by the utility model, huge parts such as a tailstock, an oil-free bushing and a spacer bush are saved, and the cost is reduced. The function of automatic elastic jacking can be achieved through cooperation of the elastic deformation piece, the tip and the tool holder. The structure also has the characteristics of stable and reliable working process and small occupied space. And the arrangement of the umbrella-shaped tip structure widens the inner hole range of the adaptive product.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining auxiliary equipment, and more specifically, relates to a top structure. Background Art

[0002] With the development of special vehicle technology, special vehicle chassis leveling system is indispensable. The leveling leg hydraulic cylinder is the core product in the leveling system, which can ensure the reliable locking of the vehicle after leveling. The locking sleeve hydraulic cylinder can be used on chassis of various tonnages. The cylinder barrel is the key part of the locking sleeve hydraulic cylinder, and there are many specifications.

[0003] In order to improve production capacity and build automated production lines, the application of robot technology can realize the automated loading and circulation of multiple finishing processes to improve production efficiency. However, due to the large number of cylinder specifications, the outer diameters and lengths of different cylinders are different. When the robot grabs and loads the material, it cannot be accurately placed on the positioning surface of the machine tool fixture, resulting in inaccurate clamping of the machine tool, requiring manual intervention, and affecting the work efficiency of the production line. In addition, the traditional clamping tool is large in size and uses multiple tool positions of the machine tool, which greatly reduces the utilization rate of the machine tool. Therefore, it is necessary to develop a new top structure. Utility Model Content

[0004] The purpose of the utility model is to provide a top structure, aiming to solve the technical problem in the prior art that when the robot grabs and feeds materials, the robot cannot be accurately placed on the positioning surface of the machine tool fixture, resulting in inaccurate clamping of the machine tool, requiring manual intervention, and affecting the work efficiency of the production line.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a top structure, including:

[0006] A knife holder having a mounting hole;

[0007] An elastic deformable member is arranged in the mounting hole,

[0008] A tip, part of which extends into the mounting hole, the tip contacts the elastic deformable member, and an end of the tip facing away from the tool holder is a positioning end for positioning an external structure;

[0009] A limit assembly connected to the top and used to constrain the top to move relative to the tool holder along a specific path;

[0010] A fixing member is used to pass through the top tip, the elastic deformation member and connect with the tool holder.

[0011] Preferably, the fixing member is a screw structure, and the screw structure passes through the positioning end of the tip and passes through the bottom of the mounting hole to be detachably connected to the tool holder.

[0012] Preferably, a second receiving groove for receiving a partial structure of the fixing member is provided at the positioning end of the center.

[0013] Preferably, an elastic deformation member fixing member is further included. When the elastic deformation member fixing member is connected to the tool holder, a partial structure of the elastic deformation member fixing member extends into the mounting hole to limit the elastic deformation member.

[0014] Preferably, a first receiving groove is provided at one end of the center extending into the mounting hole, and the first receiving groove is adapted to the elastic deformation member.

[0015] Preferably, a spring force adjusting member is further included, which is disposed in the receiving groove and has one end in contact with the elastic deformation member, and the spring force adjusting member is used to adjust the magnitude of the acting force of the elastic deformation member.

[0016] Preferably, the limiting component is a positioning post connected to the center; a key groove adapted to the positioning post is provided on the wall surface of the mounting hole.

[0017] Preferably, the shape of the center is umbrella-shaped.

[0018] Preferably, an anti-rotation structure is provided on the outer side surface of the tool holder.

[0019] Preferably, the center includes:

[0020] An extending portion;

[0021] A butting portion, the shape of which is an umbrella surface shape, and the center position of the butting portion is connected to one end of the extending portion, and the end surface of the positioning end is a plane.

[0022] The beneficial effect of a center structure provided by the present utility model is as follows: Compared with the prior art, in the center structure of the present utility model, in the case of light load, large tailstocks, oil-free bushings, spacers and other parts are saved, and the cost is reduced. Through the cooperation of the elastic deformation member, the center and the tool holder, the function of automatic elastic clamping can be realized. This structure also has the characteristics of stable and reliable working process and small occupied space. The setting of the umbrella-shaped center structure broadens the inner hole range of the applicable products, thereby improving the applicable range of this center structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1A three-dimensional structural schematic diagram of a top structure provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of a front view of a top structure provided by an embodiment of the utility model;

[0026] Figure 3 For along Figure 2 The cross-sectional structure diagram of the middle BB line;

[0027] Figure 4 A three-dimensional schematic diagram of another top structure provided in an embodiment of the utility model Figure 1 ;

[0028] Figure 5 A three-dimensional schematic diagram of another top structure provided in an embodiment of the utility model Figure 2 ;

[0029] Figure 6 A structural schematic diagram of another top structure provided by an embodiment of the utility model;

[0030] Figure 7 For along Figure 6 Cross-sectional structure diagram along line AA.

[0031] In the figure: 1. tool holder; 11. mounting hole; 12. keyway; 13. mounting body; 14. connecting body; 15. anti-rotation structure; 2. top; 21. first accommodating groove; 22. second accommodating groove; 23. abutting portion; 24. extending portion; 3. elastic deformable member; 4. fixing member; 5. elastic deformable member fixing member; 6. limiting assembly; 7. elastic force adjustment member. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Please also read Figures 1 to 7 Now, a tip structure provided by the utility model is described. The tip structure includes a tool holder 1, a tip 2, an elastic deformation member 3, a fixing member 4 and a limiting assembly 6. The tool holder 1 is provided with a mounting hole 11; the elastic deformation member 3 is arranged in the mounting hole 11, and a part of the tip 2 extends into the mounting hole 11. The tip 2 contacts the elastic deformation member 3, and the end of the tip 2 away from the tool holder 1 is a positioning end for positioning an external structure; the limiting assembly 6 is connected to the tip 2 to constrain the tip 2 to move relative to the tool holder 1 along a specific path; the fixing member 4 is used to pass through the tip 2 and the elastic deformation member 3 and connect to the tool holder 1. The tip 2 is in the shape of an umbrella.

[0034] When this center structure is in use, first install the tool holder 1 on the machine tool turret, then place the elastic deformation member 3 in the installation hole 11, then insert a part of the structure of the center 2 into the installation hole 11, connect the center 2 with the limit component 6, and then use the fixing member 4 to fix the connection state of the center 2, the elastic deformation member 3 and the tool holder 1.

[0035] The external structure (such as a cylinder barrel) contacts the positioning end of the center 2, and the external structure is tightened through the cooperation of the elastic deformation member 3, the center 2 and the tool holder 1.

[0036] Compared with the prior art, the center structure provided by the present utility model saves a large number of parts such as a huge tailstock, an oil-free bushing, and a spacer sleeve under light load conditions, reducing costs. Through the cooperation of the elastic deformation member 3, the center 2 and the tool holder 1, the function of automatic elastic tightening can be realized. The setting of the umbrella-shaped center structure broadens the range of inner holes of applicable products, thereby improving the applicable range of this center structure. The operation efficiency is effectively improved. This structure also has the characteristics of stable and reliable working process and small occupied space.

[0037] As a specific implementation manner of an embodiment of the present utility model, please refer to Figures 1 to 7 together. The center 2 includes an abutting portion 23 and an extending portion 24. The extending portion 24 is a cylindrical structure. The shape of the abutting portion 23 is an umbrella surface shape, and the center position of the abutting portion 23 is connected to one end of the extending portion 24. The end surface of the abutting portion 23 facing away from the extending portion 24 (i.e., the positioning end) is a plane. The outer side surface of the abutting portion 23 is used to abut against the inner hole of the cylinder barrel. A second receiving groove 22 for receiving a part of the structure of the fixing member 4 is provided on the end surface of the positioning end. A first receiving groove 21 is provided at one end of the extending portion 24 facing away from the abutting portion 23 (i.e., the end where the center 2 extends into the installation hole 11). The first receiving groove 21 is adapted to the elastic deformation member 3. The second receiving groove 22 and the first receiving groove 21 are communicated through a communication hole.

[0038] Specifically, the center 2 is made of 42CrMo material, which has good heat treatment performance, high hardness, wear resistance and impact resistance. The front of the center 2 is conical, which plays a role in positioning the cylinder barrel workpiece. The maximum diameter of the cone is 230 mm, and the minimum diameter is 96 mm.

[0039] As a specific implementation manner of an embodiment of the present utility model, please refer to Figures 1 to 7 together. The limit component 6 is a positioning column connected to the center 2; a key groove 12 adapted to the positioning column is provided on the wall surface of the installation hole 11. The positioning column can slide reciprocally along the key groove 12.

[0040] In this embodiment, the limit component 6 is detachably connected to the outer wall surface of the extending portion 24 through one or more of structures such as a threaded structure and a card slot structure.

[0041] In this embodiment, the shape of the limiting component 6 is not unique and can be one or more of structures such as a positioning post, a positioning block, etc., as long as it can cooperate with the keyway 12 to limit the moving path of the center point 2.

[0042] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 7 simultaneously. The tool holder 1 includes a mounting body 13 and a connecting body 14 fixedly connected to the mounting body 13. One end of the mounting body 13 is provided with a mounting hole 11, and the middle position at the other end of the mounting body 13 is fixedly connected with the connecting body 14.

[0043] In this embodiment, the mounting body 13 is a cylinder; the connecting body 14 is a cylinder. The axis of the mounting body 13 coincides with the axis of the connecting body 14.

[0044] In this embodiment, an anti-rotation structure 15 is provided on the outer side surface of the connecting body 14. The anti-rotation structure 15 can be a milled flat structure.

[0045] Specifically, the tool holder 1 is inserted into the tool disc in a cylindrical shape similar to the principle of a cylindrical pin, and there is a flat shape (i.e., the anti-rotation structure 15) on the cylinder to play an anti-rotation role. A cylindrical hole (i.e., the mounting hole 11) is machined above the tool holder 1, and the center point 2 is inserted into the mounting hole 11.

[0046] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 7 simultaneously. The elastic deformation member 3 is a spring structure. More specifically, the elastic deformation member 3 is a rectangular spring.

[0047] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 7 simultaneously. The center point structure further includes an elastic deformation member fixing member 5. When the elastic deformation member fixing member 5 is connected to the tool holder 1, a part of the structure of the elastic deformation member fixing member 5 extends into the mounting hole 11 to limit the elastic deformation member 3. The elastic deformation member fixing member 5 is a screw structure, and the screw structure is connected to the mounting body 13 through a threaded structure. The screw structure can extend into the mounting hole 11 and realize the limiting and fixing of the elastic deformation member 3 by being inserted into the elastic deformation member 3 or the gap of the elastic deformation member 3 (which is a spring structure).

[0048] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 7 simultaneously. The center point structure further includes an elastic force adjusting member 7 for being arranged in the first accommodating groove 21 and having one end in contact with the elastic deformation member 3. The elastic force adjusting member 7 is used to adjust the acting force magnitude of the elastic deformation member 3.

[0049] In this embodiment, the elastic adjustment member 7 is a structure of an elastic gasket. The acting force of the elastic deformation member 3 can be adjusted by changing the number of gaskets used.

[0050] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 5 , the structure of the fixing member 4 is not unique, and the structure of the fixing member 4 can be one or more of structures such as bolts and screws.

[0051] In this embodiment, the fixing member 4 is a screw structure, and the screw structure passes through the positioning end of the top 2 and passes through the bottom of the mounting hole 11 to be detachably connected to the tool holder 1. More specifically, the screw structure sequentially passes through the second receiving groove 22, the communication hole, the first receiving groove 21 and is threadedly connected to the tool holder 1.

[0052] In this embodiment, when the elastic deformation member fixing member 5 fixes the elastic deformation member 3, it can be simultaneously clamped with the screw structure, and thus the fixing member 4 is simultaneously limited, improving the firmness of the connection relationship between the fixing member 4 and the tool holder 1.

[0053] During use, the top 2 can reciprocate axially relative to the tool holder 1 along the mounting hole 11. During this process, the tail end of the screw structure also reciprocates along the axis direction of the second receiving groove 22.

[0054] As a specific implementation manner of the embodiment of the present utility model, please refer to Figures 1 to 7 , the fixing member 4 contacts the second receiving groove 21 through a buffer member. The setting of the buffer member reduces the wear of the fixing member 4 during use and improves the service life of this top structure.

[0055] Specifically, the fixing member 4 is an internal hexagonal socket head shoulder bolt, and the internal hexagonal socket head shoulder bolt fixes the top 2 on the tool holder 1. The rectangular spring is sleeved on the internal hexagonal socket head shoulder bolt, and the cylinder workpiece is tightened by the spring force.

[0056] The fixing member 4 can perform angular positioning on the top 2. When a larger cylinder workpiece needs to be positioned, it is necessary to remake the top 2 and increase the maximum diameter of the top 2, which may interfere with the tools at other positions on the tool disc. It is necessary to cut off a part of the cone of the top 2. At this time, it is necessary to tighten the fixing member 4 to perform angular positioning on the top 2.

[0057] The usage process of a center structure provided by the present utility model is as follows: according to the processing technology, the center structure is installed on the tool rest of the machine tool; the required tools are also installed at other tool positions. The manipulator grabs the workpiece and places it at the clamping position of the machine tool. The tool rest is controlled to move through the numerical control program, so as to control the center structure to press the inner hole of the workpiece, and the elastic deformation member 3 inside the center structure balances the length error between different cylinders, ensuring that each workpiece can be pressed tightly and the machine tool will not be overloaded due to excessive pressing. After the workpiece is pressed tightly, fixtures such as the steady rest and hydraulic chuck of the machine tool are clamped in sequence. The robot gripper is released, and the center structure is withdrawn. At this time, the feeding action of the robot is completed. After receiving the signal that the feeding is completed, the machine tool automatically starts the processing program and executes the processing action.

[0058] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A top structure, characterized in that: include: A tool holder (1) having a mounting hole (11); The elastic deformation member (3) is arranged in the mounting hole (11). A tip (2), part of which extends into the mounting hole (11), the tip (2) contacts the elastic deformable member (3), and an end of the tip (2) facing away from the tool holder (1) is a positioning end for positioning an external structure; the tip (2) is in the shape of an umbrella; A limiting assembly (6) connected to the tip (2) and used to constrain the tip (2) to move along a specific path relative to the tool holder (1); A fixing member (4) is used to pass through the tip (2) and the elastic deformation member (3) and to be connected to the tool holder (1).

2. A top structure as claimed in claim 1, characterized in that: The fixing member (4) is a screw structure, which passes through the positioning end of the tip (2) and passes through the bottom of the mounting hole (11) to be detachably connected to the tool holder (1).

3. A top structure as claimed in claim 2, characterized in that: The positioning end of the tip (2) is provided with a second accommodating groove (22) for accommodating a partial structure of the fixing member (4).

4. A top structure as claimed in claim 1, characterized in that: It also comprises an elastic deformable member fixing member (5). When the elastic deformable member fixing member (5) is connected to the tool holder (1), a part of the structure of the elastic deformable member fixing member (5) extends into the mounting hole (11) to limit the elastic deformable member (3).

5. A top structure as claimed in claim 3, characterized in that: One end of the tip (2) extending into the mounting hole (11) is provided with a first receiving groove (21), and the first receiving groove (21) is adapted to the elastic deformation member (3).

6. A top structure as claimed in claim 5, characterized in that: It also includes an elastic force adjustment member (7) which is arranged in the first receiving groove (21) and has one end in contact with the elastic deformation member (3). The elastic force adjustment member (7) is used to adjust the force of the elastic deformation member (3).

7. A top structure according to claim 6, characterized in that: The limiting component (6) is a positioning column connected to the top (2); and a key groove (12) adapted to the positioning column is provided on the wall surface of the mounting hole (11).

8. A top structure as claimed in claim 1, characterized in that: An anti-rotation structure (15) is provided on the outer side surface of the tool holder (1).

9. A tip structure according to any one of claims 1 to 8, characterized in that: The top (2) comprises: An extension portion (24); The abutment portion (23) is in the shape of an umbrella surface, and the center position of the abutment portion (23) is connected to one end of the insertion portion (24), and the end surface of the positioning end is a plane.

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