A chamber tube flat end face clamp

Abstract

This utility model discloses a clamp for the flat end face of a tubular tube, including a flange, a pull rod, a positioning element, and a locking element. The pull rod can move along the flange axis after being pushed or pulled. The positioning element is fixed to its relative position with the flange by the locking element. The pull rod is locked in a circumferential position on the flange by the locking element. A hollow clamping body is connected to the flange. A hollow clamping spring is provided in the inner cavity of the clamping body. The clamping spring includes a body detachably connected to the pull rod. The body can move within the clamping body under the drive of the pull rod. Several spring claws are arranged around the side of the body away from the pull rod. The clamping body is provided with a positioning sleeve. The spring claws have a first driving cone surface, and the positioning sleeve has a second driving cone surface that can abut against the first driving cone surface. Pulling the pull rod causes the clamping spring to move in the same direction as the pull rod. The several spring claws contract through the first and second driving cone surfaces, thereby clamping the material to be processed as a whole.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically to a chamber tube flat end face fixture. Background Technology

[0002] To ensure the flatness of the end faces of cylindrical and tubular parts and to meet overall dimensional and design requirements, lathes or machining centers are mostly chosen for end face machining. During end face machining, traditional three-jaw chucks are often used to directly clamp the parts. However, the contact area between the jaws of the three-jaw chuck and the outer surface of the part is small. If the outer surface of the part has been painted, the jaws of the three-jaw chuck can easily damage the paint. When there are many parts to be machined, operators need to frequently operate the three-jaw chuck to clamp and unload the parts, which is time-consuming, labor-intensive, and increases the workload for operators. Therefore, there is an urgent need for a chamber tube end face fixture that can stably clamp and conveniently clamp cylindrical and tubular parts. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a chamber tube flat end face clamp that can stably clamp and conveniently mount cylindrical and tubular parts.

[0004] To solve the above-mentioned technical problems, this utility model includes a flange, a tie rod, a positioning element, and a locking element. The flange and tie rod are hollow. The outer surface of the tie rod abuts against the inner cavity of the flange. The tie rod can move along the flange axis after being subjected to a pushing or pulling force. The positioning element is located in the inner cavity of the tie rod and abuts against the inner cavity of the tie rod. The positioning element is fixed to its relative position with the flange by the locking element. The tie rod is locked in a circumferential position on the flange by the locking element. The tie rod has a connecting part that can be connected to an external power device that inputs pushing and pulling force. A hollow clamping body is detachably connected to the flange. The inner cavity is provided with a hollow clamping spring, which includes a body detachably connected to the pull rod. The body can move in the clamping body under the drive of the pull rod. A plurality of spring claws are arranged around the side of the body away from the pull rod, and there is a gap between adjacent spring claws. The clamping body is provided with a positioning sleeve. The spring claws are provided with a first driving cone surface. The positioning sleeve is provided with a second driving cone surface that can abut against the first driving cone surface. The diameter of the second driving cone surface gradually decreases from the side away from the pull rod to the side closer to the pull rod. The spring claws have a contact surface that can contact the material to be processed, and the contact surface is adapted to the shape of the outer surface of the material to be processed.

[0005] With the above structure, the machining equipment achieves overall clamping by holding the outer surface of the flange or the outer surface of the fixture. The operator places the workpiece into the clamping spring, and after passing through the spring claws, the fixture body, and the pull rod, one end of the workpiece rests against the end of the positioning element, ensuring accurate placement. An external power unit provides continuous tension to the pull rod, causing it to move towards the flange and away from the fixture body. This movement drives the clamping spring, and the workpiece remains against the end of the positioning element due to the blocking effect of the positioning element. As the clamping spring moves, the first driving cone surface of the spring claws is compressed by the second driving cone surface of the positioning sleeve, causing several spring claws to deform inwards and move closer to each other. These deformations eventually clamp the outer surface of the workpiece, completing the clamping and holding. The external machining equipment can apply rotational force to the flange and fixture body, causing the entire fixture to rotate, and then use an external tool to cut the end face of the workpiece; alternatively, the external tool can rotate while the fixture remains stationary, allowing the external tool to cut the end face of the workpiece. By incorporating several spring-loaded claws, the contact surfaces of the claws ensure stable clamping of cylindrical and tubular parts to be processed, reducing wear on the surface of the material. An external power unit applies a pulling force to the pull rod, causing the claws to retract and automatically clamp the material, facilitating clamping and reducing the workload of operators. The detachable flange and clamp body facilitate assembly and disassembly by operators. After processing, the external power unit applies a thrust to the pull rod in the opposite direction to the pulling force, causing the pull rod and clamping springs to move in the opposite direction. The first driving cone surface of the claw moves away from the second driving cone surface of the positioning sleeve, opening the claw and allowing the operator to retrieve the finished product.

[0006] Furthermore, the locking element is a cylindrical pin, the flange has a first through-hole extending vertically through the flange, and the positioning element has a second through-hole extending vertically through the positioning element. The locking element is inserted into the first and second through-holes, and the pull rod has a first elongated hole. The first elongated hole is used to avoid the locking element when the pull rod moves and cooperates with the locking element to limit the maximum displacement of the pull rod. The width of the first elongated hole is adapted to the outer diameter of the locking element. By setting the first through-hole, the second through-hole, and the first elongated hole, the locking element is inserted into the first and second through-holes, the positioning element can be locked onto the flange, ensuring accurate positioning of the material to be processed after multiple uses, and the first elongated hole allows the pull rod to effectively avoid the locking element when moving. The locking element can ensure that the flange, pull rod, and positioning element rotate synchronously or remain stationary synchronously.

[0007] Furthermore, the flange is detachably connected to the clamp body by several screws. The flange and clamp body can be easily disassembled and assembled by tightening the screws, facilitating the overall assembly, disassembly, and maintenance of this fixture.

[0008] Furthermore, the main body has an internal thread on the side near the pull rod, and the pull rod has an external thread on the side near the main body that mates with the internal thread. The clamping body has a detachable locking element that ensures the clamping spring and the clamping body rotate synchronously. By providing the internal and external threads, the clamping spring and the pull rod are detachably connected by a threaded connection. The locking element ensures the clamping spring and the clamping body rotate synchronously, preventing relative rotation between the main body and the clamping body, which could lead to unstable clamping of the material to be processed or loosening of the main body and the pull rod at the internal and external threads.

[0009] Furthermore, the locking component includes an internal hexagonal head that abuts against the clamping body. The internal hexagonal head has a screw threaded onto the clamping body, and the screw thread has a stop bar. The body has a second elongated hole, the length of which extends parallel to the direction of movement of the clamping spring. The stop bar is located inside the second elongated hole and abuts against both sides of the hole's width. By providing the locking component and the second elongated hole, and by screwing the locking component onto the clamping body until the stop bar engages with the second elongated hole, the locking component is locked onto the clamping body. The locking component ensures that the clamping body and the body rotate together, thereby preventing relative rotation between the body and the clamping body, which could lead to unstable clamping of the material to be processed or loosening of the body and the pull rod at the internal or external threaded portions. The second elongated hole avoids the stop bar when the body moves.

[0010] In summary, this utility model has the advantages of reasonable structure and convenient use. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a structural diagram of the flange;

[0013] Figure 3 This is a structural diagram of the tie rod;

[0014] Figure 4 yes Figure 3 A schematic diagram of the structure of the tie rod projected along direction A;

[0015] Figure 5 yes Figure 3 A schematic diagram of the structure of the tie rod projected along direction B;

[0016] Figure 6 This is a structural schematic diagram of the positioning component;

[0017] Figure 7 yes Figure 6 A schematic diagram of the structure viewed in section along line CC;

[0018] Figure 8 This is a schematic diagram of the clamping body structure;

[0019] Figure 9 This is a schematic diagram of the clip spring structure;

[0020] Figure 10 yes Figure 9 A schematic diagram of the structure viewed in section along line DD;

[0021] Figure 11 yes Figure 9 A schematic diagram of the clamping spring projected along the E direction;

[0022] Figure 12 This is a schematic diagram of the positioning sleeve;

[0023] Figure 13 This is a structural diagram of the locking component;

[0024] In the diagram: 1. Flange; 11. First insertion hole; 2. Pull rod; 21. Connecting part; 22. First elongated hole; 23. External thread part; 3. Positioning element; 31. Second insertion hole; 4. Locking element; 5. Clamping body; 6. Clamping spring; 61. Body; 611. Internal thread part; 612. Second elongated hole; 62. Spring claw; 621. Second driving cone surface; 622. Contact surface; 7. Positioning sleeve; 71. First driving cone surface; 8. Screw; 9. Locking element; 91. Socket head; 92. Screw; 93. Stop bar. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0026] Reference Figures 1 to 5This utility model includes a flange 1, a pull rod 2, a positioning element 3, and a locking element 4. The flange 1 and pull rod 2 are hollow. The outer surface of the pull rod 2 abuts against the inner cavity of the flange 1, and the pull rod 2 can move along the axis of the flange 1 when subjected to a pushing or pulling force. The positioning element 3 is located in the inner cavity of the pull rod 2 and abuts against the inner cavity of the pull rod 2. The positioning element 3 is fixed to its relative position with the flange 1 by the locking element 4, which ensures that the positioning element 3 is fixed in the axial direction of the flange 1. The pull rod 2 is locked in a circumferential position on the flange 1 by the locking element 4, which ensures that the pull rod 2 rotates synchronously with the flange 1 when the flange 1 rotates, i.e., the locking element 4 ensures that the pull rod 2 and the flange 1 remain relatively stationary. The pull rod 2 is provided with a connecting part 21, which can be connected to an external power device that inputs pushing and pulling force; the power device can be a cylinder. When this fixture is clamped in the three-jaw chuck of a lathe, the three-jaw chuck drives the fixture to rotate. The output end of the cylinder is connected to the connecting part 21 through an external rotating fixture. The external rotating fixture ensures that the push and pull force of the cylinder output end is transmitted to the connecting part 21. The external rotating fixture also ensures that the cylinder, which serves as the power unit, remains stationary when the pull rod 2 rotates. The external rotating fixture can be made of a freely rotating floating joint. The connecting part 21 can be a threaded hole, and the external rotating fixture and the connecting part 21 can be connected by studs. When this fixture is clamped on the worktable of a machining center, the fixture remains stationary during use. The output end of the cylinder can be directly connected to the connecting part 21 through fastening screws or pins. The connecting part 21 can be a threaded hole or a pin hole, or it can be a protrusion directly inserted into the output end of the cylinder.

[0027] Reference Figures 1 to 7 The locking element 4 is a cylindrical pin. The flange 1 has a first insertion hole 11 that extends vertically through the flange 1, and the positioning element 3 has a second insertion hole 31 that extends vertically through the positioning element 3. The locking element 4 is inserted into the first insertion hole 11 and the second insertion hole 31. The pull rod 2 has a first elongated hole 22, which is used to avoid the locking element 4 when the pull rod 2 moves and cooperates with the locking element 4 to limit the maximum displacement of the pull rod 2. The width of the first elongated hole 22 is adapted to the outer diameter of the locking element 4. By setting the first insertion hole 11, the second insertion hole 31, and the first elongated hole 22, the locking element 4 is inserted into the first insertion hole 11 and the second insertion hole 31, and the positioning element 3 can be locked onto the flange 1, ensuring accurate positioning of the material to be processed after multiple uses. The first elongated hole 22 allows the pull rod 2 to effectively avoid the locking element 4 when it moves. The locking element 4 ensures that the flange 1, the pull rod 2, and the positioning element 3 rotate synchronously.

[0028] Reference Figures 1 to 13The flange 1 is detachably connected to a hollow clamping body 5. Specifically, the flange 1 is detachably connected to the clamping body 5 by several screws 8. The flange 1 and clamping body 5 can be easily disassembled and assembled by tightening the screws 8, facilitating the overall assembly, disassembly, and maintenance of this fixture. A hollow clamping spring 6 is provided inside the cavity of the clamping body 5. The clamping spring 6 includes a body 61 detachably connected to the pull rod 2. Specifically, the body 61 has an internal thread 611 on the side near the pull rod 2, and the pull rod 2 has an external thread 23 on the side near the body 61 that mates with the internal thread 611. The clamping body 5 is provided with a detachable locking element 9, which ensures that the clamping spring 6 and the clamping body 5 rotate synchronously. By providing an internal threaded portion 611 and an external threaded portion 23, the clamping spring 6 and the pull rod 2 are detachably connected via a threaded engagement. The locking member 9 ensures that the clamping spring 6 and the clamping body 5 rotate synchronously, preventing relative rotation between the body 61 and the clamping body 5, which could lead to unstable clamping of the material to be processed and loosening of the body 61 and the pull rod 2 at the internal threaded portion 611 and the external threaded portion 23. The body 61 can move within the clamping body 5 under the drive of the pull rod 2. A plurality of spring claws 62 are arranged around the side of the body 61 away from the pull rod 2. There is a gap between adjacent spring claws 62. The gap prevents interference between adjacent spring claws 62 when they are tightened. In this embodiment, the body 61 and the spring claws 62 are integrally formed. The clamping body 5 is equipped with a positioning sleeve 7, and the spring claw 62 is equipped with a first driving cone surface 621. The positioning sleeve 7 is equipped with a second driving cone surface 71 that can abut against the first driving cone surface 621. The diameter of the second driving cone surface 71 gradually decreases from the side away from the pull rod 2 to the side closer to the pull rod 2. The spring claw 62 has a contact surface 622 that can contact the material to be processed, and the contact surface 622 is adapted to the shape of the outer surface of the material to be processed. The first driving cone surface 621 and the second driving cone surface 71 are adapted to each other. When the clamping spring 6 continuously clamps the material to be processed, the power device provides a continuous pulling force to the pull rod 2.

[0029] Reference Figures 1 to 13 The locking element 9 includes an internal hexagon head 91 that abuts against the clamping body 5. The internal hexagon head 91 has a screw 92 screwed onto the clamping body 5. The screw 92 has a stop bar 93. The body 61 has a second elongated hole 612. The length of the second elongated hole 612 extends parallel to the direction of movement of the clamping spring 6. The stop bar 93 is located inside the second elongated hole 612 and abuts against both sides of the width direction of the second elongated hole 612. After the locking element 9 is screwed onto the clamping body 5 by the screw 92 and the stop bar 93 is engaged in the second elongated hole 612, the locking element 9 is locked onto the clamping body 5. The locking element 9 ensures that the clamping body 5 and the body 61 rotate together, thereby preventing relative rotation between the body 61 and the clamping body 5, which could lead to unstable clamping of the material to be processed and loosening of the body 61 and the pull rod 2 at the internal thread 611 and external thread 23. The second elongated hole 612 avoids the stop bar 93 when the body 61 moves.

[0030] In use, this invention allows the machining machinery to clamp the entire assembly by holding the outer surface of the flange 1 or the outer surface of the clamping body 5. The operator places the workpiece into the clamping spring 6, and the workpiece passes through the spring claws 62, the body 61, and the pull rod 2, with one end resting against the end of the positioning element 3, thus ensuring accurate placement. When the external power unit applies a continuous pulling force to the pull rod 2, causing it to move towards the flange 1 and away from the clamping body 5, the pull rod 2 drives the clamping spring 6 to move. During this movement, the workpiece remains pressed against the end of the positioning element 3 by the blocking action of the positioning element 3. As the clamping spring 6 moves, the first driving cone surface 621 of the spring claws 62 is compressed by the second driving cone surface 71 of the positioning sleeve 7, causing several spring claws 62 to deform inwards and move closer to each other. These deformations result in the spring claws 62 clamping the outer surface of the workpiece, thus securing it. External machining equipment can apply rotational force to the flange 1 and clamping body 5, causing the entire fixture to rotate, and then use an external tool to cut the end face of the workpiece. Alternatively, the external tool can rotate while the fixture remains stationary, allowing the external tool to cut the end face of the workpiece. By providing several spring claws 62, the contact surface 622 of the spring claws 62 ensures stable clamping of cylindrical or tubular parts, reducing wear on the surface of the workpiece. An external power unit applies a pulling force to the pull rod 2, causing the spring claws 62 to retract and automatically clamp the workpiece, facilitating clamping and reducing the workload of operators. The detachable function of the flange 1 and clamping body 5 facilitates assembly and disassembly by operators. After machining, the external power unit applies a thrust to the pull rod 2 in the opposite direction to the pulling force, causing the pull rod 2 and clamping spring 6 to move in the opposite direction. The first driving cone surface 621 of the spring claw 62 moves away from the second driving cone surface 71 of the positioning sleeve 7, and the spring claw 62 opens, allowing the operator to retrieve the finished product.

[0031] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims of this patent, they should all fall within the protection scope of this utility model.

Claims

1. A clamp for the flat end face of a ventricular tube, characterized in that: The assembly includes a flange (1), a pull rod (2), a positioning element (3), and a locking element (4). The flange (1) and the pull rod (2) are hollow. The outer surface of the pull rod (2) abuts against the inner cavity of the flange (1). The pull rod (2) can move along the axis of the flange (1) after being subjected to a push-pull force. The positioning element (3) is located in the inner cavity of the pull rod (2) and abuts against the inner cavity of the pull rod (2). The positioning element (3) is fixed to the relative position of the flange (1) by the locking element (4). The pull rod (2) is locked in the circumferential position of the flange (1) by the locking element (4). The pull rod (2) is provided with a connecting part (21). The connecting part (21) can be connected to an external power device that inputs push-pull force. The flange (1) is detachably connected to a hollow clamping body (5). A hollow clamping spring (6) is provided in the inner cavity of the clamping body (5). The clamping spring (6) includes a body (61) detachably connected to the pull rod (2). The body (61) can move in the clamping body (5) under the drive of the pull rod (2). The body (61) is provided with a plurality of spring claws (62) on the side away from the pull rod (2). There is a gap between adjacent spring claws (62). The clamping body (5) is provided with a positioning sleeve (7). The spring claws (62) are provided with a first driving cone surface (621). The positioning sleeve (7) is provided with a second driving cone surface (71) that can abut against the first driving cone surface (621). The diameter of the second driving cone surface (71) gradually decreases from the side away from the pull rod (2) to the side closer to the pull rod (2). The spring claws (62) have a contact surface (622) that can contact the material to be processed. The contact surface (622) is adapted to the shape of the outer surface of the material to be processed.

2. The ventricular tube flat end face clamp according to claim 1, characterized in that: The locking element (4) is a cylindrical pin. The flange (1) is provided with a first insertion hole (11) that passes through the flange (1) from top to bottom. The positioning element (3) is provided with a second insertion hole (31) that passes through the positioning element (3) from top to bottom. The locking element (4) is inserted into the first insertion hole (11) and the second insertion hole (31). The pull rod (2) is provided with a first elongated hole (22). The first elongated hole (22) is used to avoid the locking element (4) when the pull rod (2) moves and cooperates with the locking element (4) to limit the maximum displacement of the pull rod (2). The width of the first elongated hole (22) is adapted to the outer diameter of the locking element (4).

3. The ventricular tube flat end face clamp according to claim 1, characterized in that: The flange (1) is detachably connected to the clamp (5) by a number of screws (8).

4. The ventricular tube flat end face clamp according to claim 1, characterized in that: The main body (61) has an internal thread (611) on the side near the pull rod (2), and the pull rod (2) has an external thread (23) on the side near the main body (61) that can cooperate with the internal thread (611). The clamping body (5) has a detachable locking member (9), which can ensure that the clamping spring (6) and the clamping body (5) rotate synchronously.

5. The ventricular tube flat end face clamp according to claim 4, characterized in that: The locking member (9) includes an internal hexagon head (91) that abuts against the clamping body (5). The internal hexagon head (91) is provided with a screw (92) that is screwed onto the clamping body (5). The screw (92) is provided with a stop bar (93). The body (61) is provided with a second elongated hole (612). The length extension direction of the second elongated hole (612) is parallel to the movement direction of the clamping spring (6). The stop bar (93) is located inside the second elongated hole (612) and can abut against both sides of the width direction of the second elongated hole (612).

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