Distraction device

Abstract

The utility model discloses a distraction device which comprises a fixing block, a driving assembly comprises a lifting block which is located on one side of the fixing block in the vertical direction and can move in a reciprocating mode in the vertical direction, and the moving distance of the lifting block is adjustable. The multiple swing claws are evenly distributed around the fixed block, each swing claw comprises an opening part and a connecting part which are sequentially arranged in the vertical direction, the end, away from the opening part, of the connecting part is connected with the fixed block in a pivoted mode, a first groove is formed in the middle of the connecting part, and part of the lifting block is embedded into the first groove and can slide along the first groove; when the fixing block moves up and down, the lifting block pushes the swing claw to swing around the joint of the swing claw and the fixing shaft through the first groove body. When the opening device opens the annular workpiece, the impact on the annular workpiece is small, and the annular workpiece is evenly stressed and is not prone to deformation.

Description

Technical Field

[0001] This utility model relates to the field of automation module technology, and in particular to a spreading device. Background Technology

[0002] When machining ring-shaped workpieces (such as sealing rings), it is usually necessary to open the ring-shaped workpiece from the inner ring to facilitate subsequent processing. Existing opening devices typically use horizontal movement of the claws to open the ring-shaped workpiece, which occupies a large space. Furthermore, when the claws open the ring-shaped workpiece, the contact point between the ring-shaped workpiece and the claws is subjected to a large force, resulting in uneven deformation of the ring-shaped workpiece due to linear tension. This cannot adequately meet the opening requirements of the ring-shaped workpiece. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a spreading device that minimizes the impact on the annular workpiece when spreading it, ensures uniform force distribution on the annular workpiece, and prevents deformation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a spreading device, comprising:

[0005] Fixed block;

[0006] A driving assembly, the driving assembly including a lifting block located vertically on one side of a fixed block and capable of reciprocating in the vertical direction, the moving distance of the lifting block being adjustable;

[0007] The swing claw is evenly distributed around the fixed block. The swing claw includes a supporting part and a connecting part arranged in sequence along the vertical direction. The end of the connecting part away from the supporting part is pivotally connected to the fixed block. A first groove is opened in the middle of the connecting part. A portion of the lifting block is embedded in the first groove and can slide along the first groove. When the fixed block moves up and down, the lifting block pushes the swing claw to swing around the connection between the swing claw and the fixed shaft through the first groove.

[0008] The beneficial effects of this invention are as follows: by setting the first groove, the vertical movement of the lifting block is converted into the swinging of the swinging claw. The swinging claw opens the annular workpiece, and the swinging claw provides a gentler opening action during the swinging process, the force applied to the annular workpiece is more uniform, and the annular workpiece is less prone to twisting and deformation.

[0009] Furthermore, the first groove is an inclined, waist-shaped hole that extends vertically and is inclined towards the centerline of the fixed block. The inclined, waist-shaped hole decomposes the vertical force exerted by the lifting block on the swing claw, converting the vertical force into the swinging force of the swing claw.

[0010] Furthermore, the lifting block includes a lifting block body and guide wheels rotatably connected to the lifting block body. Each guide wheel corresponds to one of the swing claws, and the guide wheels are embedded in the first groove and are in rolling connection with the first groove. The guide wheels significantly reduce friction at the connection between the lifting block and the first groove.

[0011] Furthermore, the drive assembly also includes a drive motor and a lead screw. The drive motor is fixedly connected to the fixed block, and the lead screw is connected to the drive motor and rotates along its own axis under the drive of the drive motor. The lifting block is threadedly connected to the lead screw. The drive motor can adjust the moving distance of the lifting block through the lead screw, so that the swing claw can swing at different angles, thereby opening up different annular workpieces.

[0012] Furthermore, the fixing block includes a fixing block body and a hinge seat that is arranged circumferentially along the fixing block body and corresponds to the swing claw. The swing claw and the hinge seat are pivotally connected by a hinge shaft.

[0013] Furthermore, the supporting portion includes an inclined section and a vertical section, the vertical section extending in the vertical direction and used to support the annular workpiece.

[0014] Furthermore, the spreading device also includes a pushing assembly, which includes a pushing drive fixed to the connecting part and a pushing plate that can slide along the length direction of the connecting part. The pushing plate is connected to the pushing drive and slides under the push of the pushing drive to push out the annular workpiece that is spread open by the spreading part.

[0015] Furthermore, a guide groove is provided on the connecting part, and a portion of the pusher plate is embedded in the guide groove and slides along the guide groove. The guide groove guides the movement of the pusher plate.

[0016] Furthermore, the portion of the pusher plate embedded in the guide groove has a second groove extending along the length of the connecting portion. A guide rod inserted into the second groove is fixed to the connecting portion. The second groove and the guide rod cooperate to further guide the movement of the pusher plate, while simultaneously separating the pusher plate from the connecting portion.

[0017] Furthermore, the spreading device also includes a housing, the connecting portion extends out of the housing and is connected to the spreading portion, and a sensor for detecting the position of the spreading portion is fixed on the housing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram showing the connection between the drive component and the swing claw in an embodiment of this utility model;

[0020] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the swing claw in an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Fixing block; 11. Fixing block body; 12. Hinge seat;

[0024] 2. Drive assembly; 21. Lifting block; 211. Lifting block body; 212. Guide wheel; 22. Motor; 23. Lead screw;

[0025] 3. Swinging claw; 31. Spreading part; 311. Inclined section; 312. Vertical section; 32. Connecting part; 321. First groove; 322. Guide groove; 323. Guide rod;

[0026] 4. Pushing assembly; 41. Pushing drive component; 42. Pushing plate; 421. Second groove;

[0027] 5. Housing; 51. Sensor;

[0028] 6. Ring-shaped workpiece. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] This utility model discloses a spreading device for spreading out annular workpieces, such as sealing rings.

[0031] See appendix Figure 1 As shown, the spreading device includes a fixed block 1, a drive assembly 2, and a swing claw 3.

[0032] See appendix Figure 2 and attached Figure 3As shown, the drive assembly 2 includes a lifting block 21 located vertically on one side of the fixed block 1, which can reciprocate linearly in the vertical direction. Multiple swing claws 3 are evenly distributed around the fixed block 1. Each swing claw 3 includes a supporting portion 31 and a connecting portion 32 arranged sequentially in the vertical direction. The supporting portion 31 is located on the side of the connecting portion 32 away from the fixed block 1. The end of the connecting portion 32 away from the supporting portion 31 is pivotally connected to the fixed block 1. A first groove 321 is formed in the middle of the connecting portion 32, and a portion of the lifting block 21 is embedded in the first groove 321 and can slide along the first groove 321. When the fixed block 1 moves up and down, the lifting block 21 pushes the swing claw 3 to swing around the connection point between the swing claw 3 and the fixed shaft through the first groove 321.

[0033] When the lifting block 21 moves up and down, it switches between the first height position and the second height position. Multiple swing claws 3 swing synchronously to switch between the first position and the second position. When the swing claw 3 is in the first position, the opening part 31 can be inserted into the inner ring of the annular workpiece 6. When the swing claw 3 is in the second position, the opening part 31 opens the annular workpiece 6.

[0034] In this embodiment, the vertical movement of the lifting block 21 is converted into the swinging motion of the swinging claw 3 by the setting of the first groove 321. The swinging claw 3 opens the annular workpiece 6. The swinging claw 3 provides a gentler opening action during the swinging process, and the force applied to the annular workpiece 6 is more uniform, making the annular workpiece 6 less prone to twisting and deformation.

[0035] The more swing claws 3 there are, the smoother the opened annular workpiece 6 becomes. For example, as shown in the attached figure, there are six swing claws 3.

[0036] See appendix Figure 2 and attached Figure 4 As shown, the first groove 321 is an inclined waist-shaped hole. The first groove 321 extends vertically and is inclined towards the center line of the fixed block 1. The inclined waist-shaped hole decomposes the vertical force applied by the lifting block 21 to the swing claw 3, converting the vertical force into the swinging force of the swing claw 3.

[0037] See appendix Figure 3 As shown, the first groove 321 is inclined toward the center line of the lifting and fixing block 1 from the side near the supporting part 31 to the side away from the supporting part 31. At this time, when part of the lifting block 21 is located on the side of the first groove 321 away from the fixing block 1, the swing claw 3 is in the first position; when the lifting block 21 moves down to the side of the first groove 321 near the fixing block 1, it pushes the swing claw 3 to swing toward the side away from each other, and the swing claw 3 is in the second position.

[0038] Of course, in one embodiment, the first groove 321 can be tilted toward the center line of the lifting fixed block 1 from the side away from the supporting part 31 to the side close to the supporting part 31. At this time, when part of the lifting block 21 is located on the side of the first groove 321 close to the fixed block 1, the swing claw 3 is in the first position; when the lifting block 21 moves up, the swing claw 3 swings toward the side away from each other, and the swing claw 3 is in the second position.

[0039] In one embodiment, the lifting block 21 includes a lifting block body 211 and a guide wheel 212 rotatably connected to the lifting block body 211. The guide wheel 212 corresponds one-to-one with the swing claw 3. The guide wheel 212 is embedded in the first groove 321 and is in rolling connection with the first groove 321. The arrangement of the guide wheel 212 greatly reduces the friction at the connection between the lifting block 21 and the first groove 321.

[0040] See appendix Figure 2 As shown, the fixed block 1 includes a fixed block body 11 and a hinge seat 12 arranged circumferentially along the fixed block body 11. The hinge seat 12 and the swing claw 3 correspond one-to-one, and the swing claw 3 and the hinge seat 12 are pivotally connected by a hinge shaft. The hinge seat 12 provides support for the swing of the swing claw 3, and the swing claw 3 rotates around the hinge shaft.

[0041] See appendix Figure 4 As shown, the spreading part 31 includes an inclined section 311 and a vertical section 312. The inclined section 311 and the connecting part 32 are fixedly connected by a locking member. The vertical section 312 extends in the vertical direction and is used to spread the annular workpiece 6. The locking member can be a bolt.

[0042] The inclined segment 311 extends vertically and is inclined towards the centerline of the fixing block 1. For example, for a smaller sealing ring, the inclined segment 311 is inclined towards the centerline of the fixing block 1 from the side closer to the connecting portion 32 to the side farther from the connecting portion 32. In this case, the distance between the vertical segments 312 is small, which can accommodate the opening of a small annular workpiece 6.

[0043] In one embodiment, for some large-sized annular workpieces 6, the inclined segment 311 may be configured to be inclined in the vertical direction away from the center line of the fixed block 1, or the inclined segment 311 may extend in the vertical direction.

[0044] The drive assembly 2 also includes a drive motor 22 and a lead screw 23. The drive motor 22 is fixedly connected to the fixed block 1, and the lead screw 23 is connected to the drive motor 22 and rotates along its own axis under the drive of the drive motor 22. The lifting block 21 is threadedly connected to the lead screw 23. In this embodiment, the motor 22 and the lead screw 23 are used to drive the lifting block 21 to move up and down. Compared with the linear modules that usually use cylinders in the prior art, the drive motor 22 can adjust the moving distance of the lifting block 21 through the lead screw 23, so that the swing claw 3 swings at different angles, thereby opening up different annular workpieces 6.

[0045] See appendix Figure 2 As shown, the drive motor 22 and the fixed block body 11 are fixedly connected, and the lead screw 23 passes through the center of the fixed block body 11.

[0046] The spreading device also includes a housing 5, a fixing block 1, and a motor 22 drive unit fixed inside the housing 5. A connecting part 32 extends out of the housing 5 and connects to the spreading part 31. A sensor 51 for detecting the position of the spreading part 31 is fixed on the housing 5. The sensor 51 is communicatively connected to the motor 22 drive unit. When the sensor 51 detects the spreading part 31, it sends a signal to the motor 22 drive unit, and the motor 22 drive unit stops working.

[0047] In one embodiment, for annular workpieces 6 such as sealing rings, after the expanding portion 31 expands the annular workpiece 6, it is necessary to push the annular workpiece 6 out of the expanding portion 31. Therefore, the expanding device also includes a pushing assembly 4, which is used to push out the annular workpiece 6 expanded by the expanding portion 31.

[0048] In one embodiment, the pusher assembly 4 corresponds one-to-one with the swing claw 3. For example, there are six pusher assemblies 4, just like the pusher claws.

[0049] However, in some embodiments, the pusher component 4 does not correspond to the swing claw 3, but the pusher component 4 needs to be evenly arranged around the fixed block 1. For example, only three pusher components 4 are provided, but these three pusher components 4 are arranged on the swing claw 3 at intervals.

[0050] See appendix Figure 2 As shown, the pusher assembly 4 includes a pusher drive 41 fixed on the connecting part 32. The pusher drive 41 swings synchronously with the swing claw 3. The output end of the pusher drive 41 is connected to a pusher plate 42. The pusher plate 42 can slide along the length direction of the connecting part 32 under the drive of the pusher drive 41. When the pusher plate 42 slides toward the annular workpiece 6, the pusher plate 42 pushes out the annular workpiece 6 that has been opened by the opening part 31.

[0051] In one embodiment, see Appendix Figure 4As shown, a guide groove 322 is provided on the connecting part 32. Part of the pusher plate 42 is embedded in the guide groove 322 and slides along the guide groove 322. The guide groove 322 guides the sliding of the pusher plate 42 and prevents the pusher plate 42 from detaching from the connecting part 32 in the thickness direction of the connecting part 32.

[0052] See appendix Figure 3 As shown, the portion of the pusher plate 42 embedded in the guide groove 322 has a second groove 421. The second groove 421 extends along the length of the connecting portion 32, and a guide rod 323 inserted into the second groove 421 is fixed on the connecting portion 32. The guide rod can only slide within the second groove 421, which limits the movement distance of the pusher plate 42 and prevents the pusher plate from disengaging from the connecting portion 32 in the width direction.

[0053] The pusher plate 42 includes a first part and a second part arranged sequentially in a vertical direction. The end of the second part away from the first part is connected to the pusher drive member 41. The second groove 421 is formed on the first part. The second part and the inclined section 311 have the same inclination direction. The second part includes a pusher surface that can abut against the annular workpiece 6.

[0054] When the opening device opens the sealing ring, the lifting block 21 is initially at the first height position, at which point the swing claw 3 is in the first position, and the vertical section 312 can insert the sealing ring. Then, the motor 22 drives the lead screw 23 to rotate, and the lifting block 21 moves downward along the lead screw 23 until it reaches the second height position. At this point, the swing claw 3 is in the second position, and the vertical sections 312 move away from each other, opening the sealing ring. Finally, the pusher drive 41 drives the pusher plate 42 to move, pushing the opened sealing ring out of the vertical section 312 and fitting it onto the shaft.

[0055] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A spreading device, characterized in that: include: Fixed block; A driving assembly, the driving assembly including a lifting block located on one side of a fixed block in the vertical direction and capable of reciprocating in the vertical direction, the moving distance of the lifting block being adjustable; The swing claw is evenly distributed around the fixed block. The swing claw includes a supporting part and a connecting part arranged in sequence along the vertical direction. The end of the connecting part away from the supporting part is pivotally connected to the fixed block. A first groove is opened in the middle of the connecting part. A portion of the lifting block is embedded in the first groove and can slide along the first groove. When the fixed block moves up and down, the lifting block pushes the swing claw to swing around the connection between the swing claw and the fixed block through the first groove.

2. The spreading device according to claim 1, characterized in that: The first groove is an obliquely arranged waist-shaped hole, which extends vertically and is inclined toward the center line of the fixed block.

3. The spreading device according to claim 1, characterized in that: The lifting block includes a lifting block body and a guide wheel rotatably connected to the lifting block body. The guide wheel corresponds one-to-one with the swing claw. The guide wheel is embedded in the first groove and is rotatably connected to the first groove.

4. The spreading device according to claim 1, characterized in that: The drive assembly further includes a drive motor and a lead screw. The drive motor is fixedly connected to the fixed block, the lead screw is connected to the drive motor and rotates along its own axis under the drive of the drive motor, and the lifting block is threadedly connected to the lead screw.

5. The spreading device according to claim 1, characterized in that: The fixed block includes a fixed block body and a hinge seat arranged circumferentially along the fixed block body and corresponding to the swing claw. The swing claw and the hinge seat are pivotally connected by a hinge shaft.

6. The spreading device according to claim 1, characterized in that: The supporting portion includes an inclined section and a vertical section, the vertical section extending in the vertical direction and used to support the annular workpiece.

7. The spreading device according to any one of claims 1-6, characterized in that: The spreading device further includes a pushing assembly, which includes a pushing drive fixed on the connecting part and a pushing plate that can slide along the length direction of the connecting part. The pushing plate is connected to the pushing drive and slides under the push of the pushing drive to push out the annular workpiece that is spread open by the spreading part.

8. The spreading device according to claim 7, characterized in that: The connecting part is provided with a guide groove, and part of the pusher plate is embedded in the guide groove and slides along the guide groove.

9. The spreading device according to claim 8, characterized in that: The portion of the pusher plate embedded in the guide groove has a second groove, which extends along the length of the connecting portion, and a guide rod inserted into the second groove is fixed on the connecting portion.

10. The spreading device according to claim 1, characterized in that: The spreading device also includes a housing, the connecting portion extends out of the housing and is connected to the spreading portion, and a sensor for detecting the position of the spreading portion is fixed on the housing.

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