Hydraulic cutter handle of combined sealing structure

Abstract

The utility model discloses a hydraulic knife handle with a combined sealing structure, which belongs to the technical field of hydraulic knife handles and comprises a knife handle, a first cavity and a second cavity are respectively arranged in the knife handle, a sealing component is arranged in the knife handle, an expansion sleeve is arranged in the first cavity, and a protective component is arranged in the second cavity. According to the utility model, the sealing assembly is arranged, the triggering block extrudes the first liquid bag through the first supporting plate, liquid in the first liquid bag enters the second liquid bag through the infusion tube, the second liquid bag expands to drive the elastic sealing block to slide in the sliding groove, so that the elastic sealing block is tightly attached to the peripheral side of the expansion sleeve; the position and the shape of the elastic sealing block can be adjusted within a certain range so as to adapt to tiny deformation of the inner container in the high-speed machining process, the sealing performance of the connecting position of the cutter handle and the expansion sleeve is ensured, the situation that the clamping force is reduced due to hydraulic oil leakage is avoided, and therefore the stability of the device in the using process is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic tool holder technical field especially relates to a combined seal structure's hydraulic tool holder. BACKGROUND

[0002] In the modern mechanical processing field, hydraulic tool holder as a kind of efficient and accurate tool holder, with its high clamping force and high concentricity and good damping performance, has been widely used in high speed and high precision processing, in practical application, the sealing performance of hydraulic tool holder has been the key factor influencing its performance and service life, combined seal structure can provide reliable sealing performance under different working conditions by the synergies of multiple sealing methods, effectively prolong the service life of hydraulic tool holder.

[0003] As Chinese patent document (CN204545474U) a kind of assembled hydraulic tool holder, the hydraulic tool holder includes tool holder body and inner container, the one end of the tool holder body is equipped with cavity, the inner container is located in the cavity of tool holder body, annular groove is equipped on the inner wall of the cavity of tool holder body, annular oil groove is equipped on the outer wall of inner container, the groove and oil groove cooperate to form oil cavity, the tool holder body is equipped with assembly hole, tool holder body is fixed together with inner container by bolt in assembly hole, sealing ring is equipped between the inner wall of the cavity of tool holder body and the outer wall of inner container, the sealing ring includes two groups, respectively set on the two sides of oil cavity, sealing ring can effectively prevent hydraulic oil from leaking from the contact surface of the cavity of tool holder body and inner container outer circle, but the structure in use process, the high-speed rotation of hydraulic tool holder and the disassembly of device easily cause sealing ring aging damage, the sealing property of hydraulic oil is reduced, clamping force is influenced, tool is easily dropped, therefore needs to be improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at: in order to solve the prior art in use process, the high-speed rotation of hydraulic tool holder and the disassembly of device easily cause sealing ring aging damage, the sealing property of hydraulic oil is reduced, clamping force is influenced, tool is easily dropped, and a kind of combined seal structure's hydraulic tool holder is proposed.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A hydraulic tool holder with a combined sealing structure includes a tool holder, a first cavity and a second cavity respectively opened inside the tool holder, a sealing component is provided inside the tool holder, an expansion sleeve is provided in the first cavity, a protective component is provided in the second cavity, an annular first oil groove, two sealing grooves, two sliding grooves and four positioning grooves are respectively provided on the inner wall of the first cavity, an annular second oil groove corresponding to the first oil groove is provided on the outer periphery of the expansion sleeve, and four first fixing holes and four inner cavities are opened inside the tool holder;

[0007] The sealing assembly includes a first support plate, which is slidably connected in the inner cavity. A trigger block is fixedly connected to one side of the first support plate, and one end of the trigger block extends into the first cavity. A first liquid bladder and a plurality of first springs are fixedly connected to the side of the first support plate away from the trigger block. The other end of the first spring is fixedly connected to the inner wall of the handle. The side of the first liquid bladder away from the first support plate is fixedly connected to the inner wall of the handle.

[0008] As a further description of the above technical solution:

[0009] The trigger block is slidably connected inside the tool holder, and the four inner cavities are distributed in a circumferential cross shape inside the tool holder. One end of the trigger block located in the first cavity is set as a sphere.

[0010] As a further description of the above technical solution:

[0011] Both the sealing groove and the sliding groove are annular. An annular second liquid bladder is provided in the sliding groove. The outer periphery of the second liquid bladder is fixedly connected to the inner wall of the handle. An annular elastic sealing block is fixedly connected to the inner side of the second liquid bladder.

[0012] As a further description of the above technical solution:

[0013] The first liquid bladder is connected to an infusion tube on the side away from the first support plate, and all four infusion tubes are connected to the two second liquid bladders respectively through pipe joints and two branch pipes.

[0014] As a further description of the above technical solution:

[0015] The positioning grooves are arranged in a circumferential cross shape inside the tool holder. Four positioning blocks are fixedly connected to the outer periphery of the expansion sleeve. The positioning blocks are slidably connected in the positioning grooves. Two annular sealing rings are fixedly connected to the outer periphery of the expansion sleeve. The annular sealing rings are set in the sealing grooves.

[0016] As a further description of the above technical solution:

[0017] The first cavity is connected to the second cavity through the first fixing hole. The expansion sleeve has a second fixing hole inside. Both the first fixing hole and the second fixing hole have threads inside. The same fixing bolt is connected to the threads inside the first fixing hole and the second fixing hole.

[0018] As a further description of the above technical solution:

[0019] The protective assembly includes four protective cylinders located in the second cavity. One side of each protective cylinder is connected to the inner wall of the handle. The nut at one end of the fixing bolt is located inside the protective cylinder. A rotating shaft is rotatably connected inside the protective cylinder. A cylinder cover is fixedly connected to the outer circumference of the rotating shaft. A limiting block is fixedly connected to the outer circumference of the rotating shaft. The end of the limiting block away from the rotating shaft is in contact with the nut.

[0020] As a further description of the above technical solution:

[0021] The limiting block is slidably connected inside the protective cylinder. A third cavity is provided inside the protective cylinder. A second support plate is slidably connected inside the third cavity. A fixing rod is fixedly connected to one side of the second support plate. A fixing groove is provided inside the cylinder cover. One end of the fixing rod extends into the fixing groove. The part of the fixing rod inside the cylinder cover is spherical. Multiple second springs are fixedly connected to the side of the second support plate away from the fixing rod. Both the second support plate and the fixing rod are slidably connected inside the protective cylinder.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0023] 1. In this utility model, by setting a sealing component, during the insertion of the expansion sleeve, the annular sealing ring on the expansion sleeve slides into the sealing groove. Subsequently, the trigger block squeezes the first liquid bladder through the first support plate, and the liquid in the first liquid bladder is introduced into the second liquid bladder through the infusion tube. The expansion of the second liquid bladder causes the elastic sealing block to slide in the groove, so that the elastic sealing block is tightly fitted to the outer periphery of the expansion sleeve. Through the expansion of the second liquid bladder, the elastic sealing block can adjust its position and shape within a certain range to adapt to the slight deformation of the inner bladder during high-speed processing, ensuring the sealing of the connection between the tool holder and the expansion sleeve, preventing the reduction of clamping force due to hydraulic oil leakage, thereby improving the stability of the device during use.

[0024] 2. In this utility model, by setting up a protective component, the operator rotates the cylinder cover, and the cylinder cover drives the fixing rod to contact the nut through the rotating shaft, limiting the bolt. At the same time, it squeezes the fixing rod, and the fixing rod squeezes the second spring through the second support plate. When the cylinder cover completely covers the protective cylinder, the second spring drives the fixing rod to insert into the cylinder cover through the second support plate, completing the fixation. This prevents the bolt from loosening due to the high-speed movement during the tool holder processing, which would cause errors in the processing process, thereby improving the reliability of the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0027] Figure 3 This is a schematic cross-sectional view of the overall structure of the tool holder of this utility model;

[0028] Figure 4 This utility model Figure 3 A magnified view of the structure at point A in the middle;

[0029] Figure 5 This utility model Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0030] Figure 6 This is a schematic cross-sectional view of the overall structure of the expansion sleeve of this utility model;

[0031] Figure 7 This is a schematic cross-sectional view of the protective cylinder of this utility model.

[0032] Legend:

[0033] 1. Knife handle; 2. First cavity; 3. Second cavity; 4. Sealing assembly; 401. First support plate; 402. Trigger block; 403. First liquid bladder; 404. First spring; 405. Second liquid bladder; 406. Elastic sealing block; 407. Infusion tube; 408. Positioning block; 409. Annular sealing ring; 5. Expansion sleeve; 6. Protective assembly; 601. Protective cylinder; 602. Rotating shaft; 603. Cylinder cover; 604. Limiting block; 605. Third cavity; 606. Second support plate; 607. Fixing rod; 608. Second spring; 7. First oil groove; 8. Sealing groove; 9. Slide groove; 10. Positioning groove; 11. Second oil groove; 12. First fixing hole; 13. Second fixing hole; 14. Inner cavity; 15. Fixing bolt. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figures 1-7This utility model provides a technical solution: a hydraulic tool holder with a combined sealing structure, including a tool holder 1, a first cavity 2 and a second cavity 3 respectively opened inside the tool holder 1, a sealing component 4 is provided inside the tool holder 1, an expansion sleeve 5 is provided inside the first cavity 2, a protective component 6 is provided inside the second cavity 3, an annular first oil groove 7, two sealing grooves 8, two sliding grooves 9 and four positioning grooves 10 are respectively provided on the inner wall of the first cavity 2, an annular second oil groove 11 corresponding to the first oil groove 7 is provided on the outer periphery of the expansion sleeve 5, and four first fixing holes 12 and four inner cavities 14 are opened inside the tool holder 1;

[0036] The sealing assembly 4 includes a first support plate 401, which is slidably connected in the inner cavity 14. A trigger block 402 is fixedly connected to one side of the first support plate 401, and one end of the trigger block 402 extends into the first cavity 2. A first liquid bladder 403 and a plurality of first springs 404 are fixedly connected to the side of the first support plate 401 away from the trigger block 402. The other end of the first spring 404 is fixedly connected to the inner wall of the handle 1. The side of the first liquid bladder 403 away from the first support plate 401 is fixedly connected to the inner wall of the handle 1.

[0037] The specific implementation method is as follows: During the insertion of the expansion sleeve 5, the annular sealing ring 409 on the expansion sleeve 5 will slide into the corresponding sealing groove 8. At the same time, the trigger block 402 applies pressure to the first liquid bladder 403 with the help of the first support plate 401, causing the liquid inside the first liquid bladder 403 to be squeezed into the second liquid bladder 405 through the infusion tube 407. As the second liquid bladder 405 continues to expand, it pushes the elastic sealing block 406 to slide along the slide groove 9, so that the elastic sealing block 406 and the outer periphery of the expansion sleeve 5 are tightly fitted, thereby effectively sealing the connection between the tool holder 1 and the expansion sleeve 5. By setting a double seal, it is ensured that even if the sealing ring cannot play a normal sealing role, the sealing component can still prevent hydraulic oil leakage, ensuring the sealing performance at the connection between the tool holder 1 and the expansion sleeve 5, effectively avoiding the problem of reduced clamping force caused by hydraulic oil leakage, thereby reducing the risk of the tool falling off accidentally and improving the stability of the device during operation.

[0038] The trigger block 402 is slidably connected inside the handle 1. The four inner cavities 14 are arranged in a circumferential cross shape inside the handle 1. One end of the trigger block 402 located in the first cavity 2 is spherical. The sealing groove 8 and the sliding groove 9 are both annular. An annular second liquid bladder 405 is provided in the sliding groove 9. The outer periphery of the second liquid bladder 405 is fixedly connected to the inner wall of the handle 1. An annular elastic sealing block 406 is fixedly connected to the inner side of the second liquid bladder 405. The side of the first liquid bladder 403 away from the first support plate 401 is connected to an infusion tube 407. All four infusion tubes 407 are connected to pipe joints and two branch tubes. The expansion sleeve 5 is connected to two second liquid bladders 405 respectively. The positioning grooves 10 are distributed in a circumferential cross shape inside the handle 1. Four positioning blocks 408 are fixedly connected to the outer periphery of the expansion sleeve 5. The positioning blocks 408 are slidably connected in the positioning grooves 10. Two annular sealing rings 409 are fixedly connected to the outer periphery of the expansion sleeve 5. The annular sealing rings 409 are set in the sealing grooves 8. The first cavity 2 is connected to the second cavity 3 through the first fixing hole 12. The expansion sleeve 5 has a second fixing hole 13 inside. Both the first fixing hole 12 and the second fixing hole 13 have threads inside. The same fixing bolt 15 is threaded into the second fixing hole 13. The protective assembly 6 includes four protective cylinders 601, which are located inside the second cavity 3. One side of the protective cylinder 601 is connected to the inner wall of the handle 1. The nut at one end of the fixing bolt 15 is placed inside the protective cylinder 601. A rotating shaft 602 is rotatably connected inside the protective cylinder 601. A cylinder cover 603 is fixedly connected to the outer circumference of the rotating shaft 602. A limiting block 604 is fixedly connected to the outer circumference of the rotating shaft 602. The end of the limiting block 604 away from the rotating shaft 602 is in contact with the nut. The limiting block 604 slides. Connected inside the protective cylinder 601, the protective cylinder 601 has a third cavity 605, and a second support plate 606 is slidably connected inside the third cavity 605. A fixing rod 607 is fixedly connected to one side of the second support plate 606. A fixing groove is opened inside the cylinder cover 603. One end of the fixing rod 607 extends into the fixing groove. The part of the fixing rod 607 inside the cylinder cover 603 is set as a ball. Multiple second springs 608 are fixedly connected to the side of the second support plate 606 away from the fixing rod 607. The second support plate 606 and the fixing rod 607 are both slidably connected inside the protective cylinder 601.

[0039] The specific implementation method is as follows: The operator rotates the cylinder cover 603, and the cylinder cover 603 drives the fixing rod 607 to contact the nut through the rotating shaft 602, thereby limiting the bolt. During this process, the fixing rod 607 is squeezed and the second spring 608 is compressed through the second support plate 606. When the cylinder cover 603 completely covers the protective cylinder 601, the elastic force of the second spring 608 drives the fixing rod 607 to insert into the cylinder cover 603 through the second support plate 606 to complete the fixation, preventing the bolt from loosening and causing machining errors when the tool holder 1 is processed at high speed, thereby improving the reliability of the device.

[0040] Working principle: During use, the operator manually aligns the positioning block 408 on the expansion sleeve 5 with the positioning groove 10 on the tool holder 1, and then vertically inserts the expansion sleeve 5 into the first cavity 2. During the insertion process, the annular sealing ring 409 on the expansion sleeve 5 slides into the sealing groove 8. At the same time, the outer side of the expansion sleeve 5 presses the trigger block 402, which, through the first support plate 401, presses the first liquid bladder 403, and the liquid in the first liquid bladder 403 is transported to the second liquid bladder 405 through the infusion tube 407. The second liquid bladder 405 expands, causing the elastic sealing block 406 to slide in the sliding groove 9, so that the elastic sealing block 406 is tightly fitted with the outer periphery of the expansion sleeve 5, thereby connecting the tool holder 1 and the expansion sleeve 5. The expansion sleeve 5 is fully inserted and sealed. The operator then uses a tool to tighten the fixing bolt 15, causing it to move along the thread into the second fixing hole 13 in the expansion sleeve 5. When the fixing bolt 15 has secured the expansion sleeve 5, the operator rotates the sleeve cover 603. The sleeve cover 603, through the rotating shaft 602, drives the fixing rod 607 to contact the nut, limiting the bolt. At the same time, the sleeve cover 603 presses the fixing rod 607, and the fixing rod 607, through the second support plate 606, presses the second spring 608. When the sleeve cover 603 completely covers the protective sleeve 601, the second spring 608, through the second support plate 606, drives the fixing rod 607 to insert into the sleeve cover 603, completing the securing of the expansion sleeve 5.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydraulic tool holder with a combined sealing structure, comprising a tool holder (1), characterized in that: The handle (1) has a first cavity (2) and a second cavity (3) inside. The handle (1) is equipped with a sealing component (4). An expansion sleeve (5) is provided in the first cavity (2). A protective component (6) is provided in the second cavity (3). The inner wall of the first cavity (2) is provided with an annular first oil groove (7), two sealing grooves (8), two sliding grooves (9) and four positioning grooves (10). The outer periphery of the expansion sleeve (5) is provided with an annular second oil groove (11) corresponding to the first oil groove (7). The handle (1) has four first fixing holes (12) and four inner cavities (14) inside. The sealing assembly (4) includes a first support plate (401), which is slidably connected in the inner cavity (14). A trigger block (402) is fixedly connected to one side of the first support plate (401). One end of the trigger block (402) extends into the first cavity (2). A first liquid bladder (403) and a plurality of first springs (404) are fixedly connected to the side of the first support plate (401) away from the trigger block (402). The other end of the first spring (404) is fixedly connected to the inner wall of the handle (1). The side of the first liquid bladder (403) away from the first support plate (401) is fixedly connected to the inner wall of the handle (1).

2. The hydraulic tool holder with a combined sealing structure according to claim 1, characterized in that: The trigger block (402) is slidably connected inside the handle (1), and the four inner cavities (14) are distributed in a circumferential cross shape inside the handle (1). One end of the trigger block (402) located inside the first cavity (2) is set as a sphere.

3. The hydraulic tool holder with a combined sealing structure according to claim 2, characterized in that: The groove (9) is provided with an annular second liquid bladder (405). The outer periphery of the second liquid bladder (405) is fixedly connected to the inner wall of the handle (1). An annular elastic sealing block (406) is fixedly connected to the inner side of the second liquid bladder (405).

4. The hydraulic tool holder with a combined sealing structure according to claim 3, characterized in that: The first liquid bladder (403) is connected to an infusion tube (407) on the side away from the first support plate (401), and all four infusion tubes (407) are connected to the two second liquid bladders (405) through pipe joints and two branch pipes respectively.

5. A hydraulic tool holder with a combined sealing structure according to claim 4, characterized in that: The positioning groove (10) is distributed in a circumferential cross shape inside the handle (1). Four positioning blocks (408) are fixedly connected to the outer periphery of the expansion sleeve (5). The positioning blocks (408) are slidably connected in the positioning groove (10). Two annular sealing rings (409) are fixedly connected to the outer periphery of the expansion sleeve (5). The annular sealing rings (409) are set in the sealing groove (8).

6. The hydraulic tool holder with a combined sealing structure according to claim 5, characterized in that: The first cavity (2) is connected to the second cavity (3) through the first fixing hole (12). The expansion sleeve (5) has a second fixing hole (13) inside. Both the first fixing hole (12) and the second fixing hole (13) have threads inside. The first fixing hole (12) and the second fixing hole (13) are connected to the same fixing bolt (15) by threads inside.

7. A hydraulic tool holder with a combined sealing structure according to claim 6, characterized in that: The protective assembly (6) includes four protective cylinders (601). The protective cylinders (601) are located in the second cavity (3). One side of the protective cylinder (601) is connected to the inner wall of the handle (1). The nut at one end of the fixing bolt (15) is set inside the protective cylinder (601). A rotating shaft (602) is rotatably connected inside the protective cylinder (601). A cylinder cover (603) is fixedly connected to the outer periphery of the rotating shaft (602). A limiting block (604) is fixedly connected to the outer periphery of the rotating shaft (602). The end of the limiting block (604) away from the rotating shaft (602) is in contact with the nut.

8. The hydraulic tool holder with a combined sealing structure according to claim 7, characterized in that: The limiting block (604) is slidably connected inside the protective cylinder (601). A third cavity (605) is provided inside the protective cylinder (601). A second support plate (606) is slidably connected inside the third cavity (605). A fixing rod (607) is fixedly connected to one side of the second support plate (606). A fixing groove is provided inside the cylinder cover (603). One end of the fixing rod (607) extends into the fixing groove. The part of the fixing rod (607) inside the cylinder cover (603) is spherical. A plurality of second springs (608) are fixedly connected to the side of the second support plate (606) away from the fixing rod (607). The second support plate (606) and the fixing rod (607) are both slidably connected inside the protective cylinder (601).

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