Workpiece fixing device for tensioning and supporting from inner side of workpiece

Abstract

The utility model provides a workpiece fixing device for tensioning and supporting from the inner side of a workpiece, and relates to the technical field of workpiece fixing. The workpiece fixing device comprises a first fixing base, a first rotating base arranged on the first fixing base, a rotating transmission piece arranged on the first rotating base, a first driving piece, a second driving piece and a plurality of lateral guide wheels, wherein the first driving piece and the second driving piece are connected to the rotating transmission piece and the first rotating base respectively, and the lateral guide wheels are arranged on the first rotating base in a rotatable mode. And a plurality of first clamping members circumferentially arranged on the first rotating seat. The rotating transmission part is configured to drive the first clamping component to be opened in the radial direction of the first rotating base so as to support and be connected to the inner side of the workpiece. The first clamping component comprises a first rail arranged on the first rotating base, a first sliding base arranged on the first rail, a universal conveying ball arranged on the first sliding base and a first supporting piece. The rotating transmission piece is provided with an arc-shaped guide hole. And the first sliding seat penetrates through the arc-shaped guide hole.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece fixing, in particular to a workpiece fixing device which is tensioned and supported from the inner side of the workpiece. Background Art

[0002] When machining the outer surface of an annular tubular workpiece or a bowl-shaped workpiece, it is usually necessary to support and fix the workpiece through the inner side.

[0003] In the prior art, the workpiece is mainly fixed by tensioning the inner side of the workpiece. The tensioning support and fixing structures mainly include the lathe chuck three-jaw system, and the structure of moving multiple support blocks at the same time through the gear plus screw structure. Among them, the transmission efficiency of the lathe chuck three-jaw system is too low, and it takes many turns to adjust the support diameter, which is not suitable for workpieces with large changes in inner diameter. The gear plus screw structure requires a large volume and cannot be implemented in a limited space, so it is applicable to fewer scenarios.

[0004] In view of this, the applicant filed this application after studying the existing technology. Utility Model Content

[0005] The utility model provides a workpiece fixing device for tensioning and supporting from the inner side of the workpiece, aiming to improve at least one of the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a workpiece fixing device for tensioning and supporting from the inner side of the workpiece, which comprises a first fixed seat, a first rotating seat rotatably arranged on the first fixed seat, a rotating transmission member rotatably arranged on the first rotating seat, a first driving member engaged between the first rotating seat and the rotating transmission member, a second driving member transmission-connected to the first rotating seat, and a plurality of first clamping members circumferentially arranged on the first rotating seat. The rotating transmission member is configured to be able to drive the first clamping member to open along the radial direction of the first rotating seat to support and engage with the inner side of the workpiece.

[0007] The first clamping member includes a first track disposed on the first rotating seat, a first slide seat slidably disposed on the first track, and a first support member extending upward from the first slide seat and provided with a support surface. The rotating transmission member is provided with an arc-shaped guide hole. The first slide seat and / or the first support member pass through the arc-shaped guide hole so as to be driven by the arc-shaped guide hole to move along the first track.

[0008] The workpiece fixing device further comprises a plurality of lateral guide wheels rotatably arranged on the first rotating seat, wherein the lateral guide wheels are engaged with the side surfaces of the rotating transmission member.

[0009] The first clamping member further comprises a universal conveying ball disposed on the first sliding seat, wherein the universal conveying ball can support the rotating transmission member.

[0010] In an optional embodiment, the workpiece fixing device further comprises a first transmission member rotatably disposed on the first fixing seat, and a second transmission member disposed on an output end of the second driving member. The first rotating seat is disposed on the first transmission member.

[0011] The first transmission member is constructed as a circular outer gear structure. The first driving member passes through the first transmission member so that the rotation axes of the first rotating seat and the rotating transmission member are coaxial.

[0012] The second transmission member is configured as a gear that can mesh with the first transmission member, and is used to transmit the rotation of the second drive member to the first transmission member.

[0013] In an optional embodiment, the rotation transmission member is configured on the output shaft of the first driving member.

[0014] In an optional embodiment, the first clamping member further comprises a first rotating member rotatably disposed on the first sliding seat, wherein the first rotating member is used to be embedded in the arc-shaped guide hole.

[0015] In an optional embodiment, the first slide seat is provided with a mounting protrusion passing through the arc-shaped guide hole, the first rotating member is rotatably arranged on the mounting protrusion, and the first supporting member is arranged on the mounting protrusion.

[0016] In an optional embodiment, the end of the mounting protrusion is configured as a polygonal structure. The first support member is provided with a polygonal hole adapted to the end of the mounting protrusion, and is non-rotatably sleeved on the mounting protrusion.

[0017] In an optional embodiment, a protective cushion block is provided on a side of the first supporting member away from and / or facing the first driving member.

[0018] In an optional embodiment, the periphery of the rotary transmission member is configured as an arc-shaped protrusion, and the periphery of the lateral guide wheel is configured as an arc-shaped groove matched with the arc-shaped protrusion to provide support while guiding.

[0019] In an optional embodiment, the periphery of the rotary transmission member and the sidewall of the arc-shaped guide hole are both provided with wear-resistant members. The number of the first clamping members is an even number.

[0020] In an optional embodiment, the number of the first clamping members is 6.

[0021] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0022] The workpiece fixing device of the utility model drives the first supporting members to move away from each other through a rotating transmission member provided with an arc-shaped guide hole. The structure is simple and the thickness is thin, so it can be applied to more scenes. The driving speed is faster and the synchronization effect between multiple supporting members is better. In addition, the pressure on the top layer can be transmitted to the lower layer through the universal conveying ball and the lateral guide wheel, which not only enables the entire device to bear a larger weight, but also greatly reduces the wear of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is an axonometric view of the workpiece fixture (the workpiece is in an exploded state).

[0025] Figure 2 is the first exploded view of the workholding device.

[0026] Figure 3 is a second exploded view of the workpiece fixture.

[0027] Markings in the figure: 1-first transmission member, 2-first driving member, 3-first rotating seat, 4-second transmission member, 5-first fixed seat, 6-lateral guide wheel, 7-universal conveying ball, 8-mounting protrusion, 9-arc guide hole, 10-rotating transmission member, 11-first supporting member, 12-first rotating member, 13-first slide seat, 14-first track. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the implementation mode of the utility model clearer, the technical scheme in the implementation mode of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation mode of the utility model. Obviously, the described implementation mode is a part of the implementation mode of the utility model, not all of the implementation modes. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the implementation mode of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected implementation mode of the utility model. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] Depend on Figures 1 to 3 As shown, an embodiment of the utility model provides a workpiece fixing device for tensioning and supporting from the inner side of the workpiece, which comprises a first fixed seat 5, a first rotating seat 3 rotatably arranged on the first fixed seat 5, a rotating transmission member 10 rotatably arranged on the first rotating seat 3, a first driving member 2 engaged between the first rotating seat 3 and the rotating transmission member 10, a second driving member drivingly connected to the first rotating seat 3, and a plurality of first clamping members circumferentially arranged on the first rotating seat 3. The rotating transmission member 10 is configured to be able to drive the first clamping member to open radially along the first rotating seat 3 to support and engage with the inner side of the workpiece. The first driving member 2 is used to drive the rotating transmission member 10 to rotate. The second driving member is used to drive the first rotating seat 3 to rotate.

[0030] The first clamping member includes a first track 14 disposed on the first rotating seat 3, a first slide seat 13 slidably disposed on the first track 14, and a first support member 11 extending upward from the first slide seat 13 and provided with a support surface. The rotating transmission member 10 is provided with an arc-shaped guide hole 9. The first slide seat 13 and / or the first support member 11 pass through the arc-shaped guide hole 9 so as to be driven by the arc-shaped guide hole 9 to move along the first track 14.

[0031] In the embodiment of the utility model, the first slide 13 is installed on the first rotating seat 3 so as to be movable linearly in the radial direction through the first track 14; the first slide 13 is driven to move synchronously along the first track 14 through the rotating transmission member 10 provided with the arc-shaped guide hole 9. Not only the multiple first clamping members have good synchronization, but also the first support member 11 has a fast moving speed and a long moving distance during operation, has a faster supporting and fixing speed, and can adapt to more product specifications, which has good practical significance.

[0032] The workpiece fixing device of the utility model drives the first supporting members 11 to move away from each other through the rotating transmission member 10 provided with the arc-shaped guide hole 9, and has a simple structure and a thin thickness, and can be applied to more scenes. In addition, the driving speed is faster, and the synchronization effect between multiple supporting members is better.

[0033] like Figures 1 to 3 As shown, based on the above embodiment, in an optional embodiment of the utility model, the workpiece fixing device further includes a plurality of lateral guide wheels 6 rotatably arranged on the first rotating seat 3. The lateral guide wheels 6 are engaged with the side surfaces of the rotating transmission member 10. The first clamping member further includes a universal conveying ball 7 arranged on the first sliding seat 13. The universal conveying ball 7 can support the rotating transmission member 10.

[0034] In the prior art, some solutions similar to the present invention drive the clamping member to open and retract through the arc-shaped through hole, which is used to clamp objects downward, so the transmission member provided with the arc-shaped hole lacks support and is not suitable for supporting and fixing external objects. In addition, when used for supporting and fixing, there will be severe friction between the parts, resulting in severe wear and tear, and a short service life.

[0035] The embodiment of the utility model can transfer the pressure of the uppermost layer to the lower layer through the universal conveying ball 7 and the lateral guide wheel 6, which not only enables the entire device to bear a greater weight, but also greatly reduces the sliding friction of the device and greatly prolongs the service life.

[0036] like Figures 1 to 3 As shown, based on the above embodiment, in an optional embodiment of the present invention, the workpiece fixing device further comprises a first transmission member 1 rotatably arranged on the first fixing seat 5, and a second transmission member 4 arranged on the output end of the second driving member. The first rotating seat 3 is arranged on the first transmission member 1.

[0037] The first transmission member 1 is constructed as a circular outer gear structure. Preferably, the rotation transmission member 10 is arranged on the output shaft of the first driving member 2. The first driving member 2 passes through the first transmission member 1 so that the rotation axes of the first rotating seat 3 and the rotation transmission member 10 are coaxial.

[0038] The second transmission member 4 is configured as a gear that can mesh with the first transmission member 1 , so as to transmit the rotation of the second driving member to the first transmission member 1 .

[0039] Specifically, the first transmission member 1 with an annular structure enables the first rotating seat 3 and the rotating transmission member 10 to be coaxially arranged. When the second driving member drives the first rotating seat 3 to rotate, the workpiece can rotate in situ without eccentric circular arc rotation, which can ensure that the sandpaper is always in contact with the surface of the workpiece during grinding, which has good practical significance. Preferably, the diameter of the first transmission member 1 is greater than the diameter of the second transmission member 4.

[0040] like Figures 1 to 3 As shown, based on the above embodiment, in an optional embodiment of the utility model, the first clamping member further includes a first rotating member 12 rotatably configured on the first slide seat 13. The first rotating member 12 is used to be embedded in the arc-shaped guide hole 9. Preferably, the first slide seat 13 is provided with a mounting protrusion 8 passing through the arc-shaped guide hole 9. The first rotating member 12 is rotatably configured on the mounting protrusion 8. The first support member 11 is configured on the mounting protrusion 8.

[0041] Specifically, the friction when driving the first slide 13 to move is further reduced by the first rotating member 12, which not only reduces the resistance during operation, but also prolongs the service life of the device, which has good practical significance. Preferably, the first rotating member 12 is a bearing.

[0042] like Figures 1 to 3 As shown, based on the above embodiment, in an optional embodiment of the present utility model, the end of the mounting protrusion 8 is set to a polygonal structure. The first support member 11 is provided with a polygonal hole adapted to the end of the mounting protrusion 8, and is non-rotatably sleeved on the mounting protrusion 8. Preferably, a protective pad is provided on the side of the first support member 11 away from and / or toward the first driving member 2.

[0043] Specifically, the protective pad is disposed on the side of the first support member 11 away from the first driving member 2, so as to support and engage with the inner side of the workpiece. The polygonal connection structure can limit the rotation of the first support member 11 to better fix the workpiece. In other embodiments, the workpiece can be fixed by other fasteners, not limited to the sleeve connection method.

[0044] like Figures 1 to 3 As shown, based on the above embodiment, in an optional embodiment of the utility model, the periphery of the rotating transmission member 10 is configured as an arc-shaped protrusion. The periphery of the lateral guide wheel 6 is configured as an arc-shaped groove adapted to the arc-shaped protrusion to provide support while guiding. Preferably, the periphery of the rotating transmission member 10 and the side wall of the arc-shaped guide hole 9 are both provided with wear-resistant parts. The number of the first clamping members is an even number.

[0045] In this embodiment, the number of the first clamping members is 6. An even number of first clamping members can provide symmetrical support inside the workpiece, so that the distribution of the supporting force is more reasonable and the product will not be damaged. By embedding the arc-shaped protrusion on the periphery of the rotating transmission member 10 into the arc-shaped groove on the periphery of the lateral guide wheel 6, the rotating transmission member 10 can be further supported. The supporting capacity of the rotating transmission member 10 is greatly improved, so that the entire device can place a heavier workpiece, which has good practical significance.

[0046] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece, characterized in that: The invention comprises a first fixed seat (5), a first rotating seat (3) rotatably arranged on the first fixed seat (5), a rotating transmission member (10) rotatably arranged on the first rotating seat (3), a first driving member (2) engaged between the first rotating seat (3) and the rotating transmission member (10), a second driving member drivingly connected to the first rotating seat (3), and a plurality of first clamping members circumferentially arranged on the first rotating seat (3); wherein the rotating transmission member (10) is configured to be able to drive the first clamping members to expand along the radial direction of the first rotating seat (3) so as to support and engage with the inner side of a workpiece; The first clamping member comprises a first track (14) arranged on the first rotating seat (3), a first slide seat (13) slidably arranged on the first track (14), and a first support member (11) extending upward from the first slide seat (13) and provided with a support surface; wherein the rotating transmission member (10) is provided with an arc-shaped guide hole (9); the first slide seat (13) and / or the first support member (11) pass through the arc-shaped guide hole (9) so as to be driven by the arc-shaped guide hole (9) to move along the first track (14); The workpiece fixing device further comprises a plurality of lateral guide wheels (6) rotatably arranged on the first rotating seat (3); wherein the lateral guide wheels (6) are engaged with the side surfaces of the rotating transmission member (10); The first clamping member further comprises a universal conveying ball (7) arranged on the first sliding seat (13); wherein the universal conveying ball (7) is capable of supporting the rotating transmission member (10).

2. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 1, characterized in that The workpiece fixing device further comprises a first transmission member (1) rotatably arranged on the first fixing seat (5), and a second transmission member (4) arranged on the output end of the second driving member; the first rotating seat (3) is arranged on the first transmission member (1); The first transmission member (1) is constructed as a circular external gear structure; the first driving member (2) passes through the first transmission member (1) so that the rotation axes of the first rotating seat (3) and the rotating transmission member (10) are coaxial; The second transmission member (4) is constructed as a gear that can mesh with the first transmission member (1) and is used to transmit the rotation of the second drive member to the first transmission member (1).

3. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 2, characterized in that , the rotating transmission member (10) is arranged on the output shaft of the first driving member (2).

4. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 1, characterized in that The first clamping member also includes a first rotating member (12) rotatably arranged on the first sliding seat (13); wherein the first rotating member (12) is used to be embedded in the arc-shaped guide hole (9).

5. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 4, characterized in that The first slide seat (13) is provided with a mounting protrusion (8) passing through the arc-shaped guide hole (9); the first rotating member (12) is rotatably arranged on the mounting protrusion (8); and the first supporting member (11) is arranged on the mounting protrusion (8).

6. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 5, characterized in that The end of the mounting protrusion (8) is arranged to be a polygonal structure; the first support member (11) is provided with a polygonal hole adapted to the end of the mounting protrusion (8) and is non-rotatably sleeved on the mounting protrusion (8).

7. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 1, characterized in that A protective pad is provided on the side of the first support member (11) away from and / or toward the first driving member (2).

8. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 1, characterized in that The peripheral edge of the rotating transmission member (10) is constructed as an arc-shaped protrusion; the peripheral edge of the lateral guide wheel (6) is constructed as an arc-shaped groove that matches the arc-shaped protrusion to provide support while guiding.

9. A workpiece fixing device for tensioning and supporting from the inner side of a workpiece according to any one of claims 1 to 8, characterized in that The periphery of the rotating transmission member (10) and the side wall of the arc-shaped guide hole (9) are both provided with wear-resistant members; and the number of the first clamping members is an even number.

10. A workpiece fixing device for tensioning and supporting from the inner side of the workpiece according to claim 9, characterized in that , the number of the first clamping members is 6.

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