Swing mechanism

Abstract

The utility model discloses a slewing mechanism, belongs to the technical field of metal pipe processing machines, and solves the problem that an existing slewing mechanism is high in noise. According to the technical scheme for solving the problem, the device mainly comprises a base, a transmission box arranged on the base, a power transmission mechanism which is arranged on the transmission box and comprises a power input shaft and a power output shaft, a chuck which is arranged on the power output shaft in a sliding mode and a clamping jaw which is arranged on the chuck in a sliding mode. The chuck is provided with a plurality of sliding grooves in the circumferential direction of the power input shaft, the clamping jaws can be inserted into the sliding grooves, a hollowed-out portion is arranged between every two adjacent sliding grooves, and the groove wall of each sliding groove has a certain thickness. The noise reduction device is mainly used for effectively reducing noise.

Description

Technical Field

[0001] The utility model relates to the technical field of metal pipe processing machines, in particular to a rotary mechanism. Background Art

[0002] In the prior art, for example, the invention patent CN102059252A discloses a rotary mechanism of a cold rolling mill, comprising a mounting support seat, a transmission box disposed on the mounting support seat and equipped with a box cover, a power transmission device disposed on the transmission box and composed of a power input shaft, a transition shaft and a power output shaft, a chuck slidably disposed on the power output shaft, and a group of claws slidably disposed on the chuck. Due to the matching clearance between the claws in the chuck, the claws and the chuck will generate impact noise during the rotation and stop of the transmission box. In particular, the chuck in the above device is truncated cone-shaped and has a large weight, and the power output shaft is located at one end of the claws and the chuck, which has a large weight, resulting in a large inertial impact and a large impact noise during the rotation and stop of the transmission box. Utility Model Content

[0003] The purpose to be achieved by the utility model is to provide a rotary mechanism, which solves the problem of high noise in the existing rotary mechanism and effectively reduces the noise.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rotary mechanism, including a base, a transmission box arranged on the base, a power transmission mechanism arranged on the transmission box and including a power input shaft and a power output shaft, a chuck slidably arranged on the power output shaft and a claw slidably arranged on the chuck, the chuck is provided with a plurality of sliding grooves for inserting the claws along the circumferential direction of the power input shaft, a hollow portion is provided between two adjacent sliding grooves, and the groove wall of the sliding groove has a certain thickness.

[0005] After adopting the above technical scheme, the utility model has the following advantages: there is a hollowed-out portion between two adjacent sliding grooves, and the groove wall of the sliding groove has a certain thickness, which not only ensures the stability and structural strength of the chuck, but also reduces the overall weight, making the force distribution of the power output shaft more reasonable, reducing the inertial impact of the chuck and the claw during the rotation and stop of the transmission box, thereby reducing the impact noise, and can also improve the operating reliability of the equipment and ensure the service life of the equipment.

[0006] Furthermore, there is a connecting portion between two adjacent sliding grooves, and the connecting portion is arranged around the circumferential direction of the power output shaft to form a through hole for the power output shaft to pass through, and the hollowed-out portion is located on the outer circle of the connecting portion in the radial direction of the power output shaft.

[0007] By adopting the above-mentioned technical solution, a connecting part is provided between two adjacent sliding grooves, and the connecting part is arranged around the circumferential direction of the power output shaft to form a through hole for the power output shaft to pass through, thereby enhancing the stability of the overall structure of the chuck, and can also ensure that the power output shaft effectively transmits power to the chuck and the claws, ensuring the stability and reliability of the clamping work, and the hollowed-out part is located on the outer ring of the connecting part in the radial direction of the power output shaft, which effectively utilizes the space, making the overall structure more compact and suitable for installation in equipment with limited space.

[0008] Furthermore, the dimension of the connecting portion in the radial direction of the power output shaft is D1, the dimension of the hollowed-out portion in the radial direction of the power output shaft is D2, and 3 / 4D2≤D1≤D2.

[0009] By adopting the above-mentioned technical solution and reasonably setting the size of the connecting part, the structural strength of the chuck can be ensured, and the weight of the chuck can be further reduced. If D1 is less than 3 / 4D2, the structural strength of the chuck is poor and deformation or breakage may occur during operation. If D1 is greater than D2, the weight of the chuck is large and the impact noise generated is large.

[0010] Furthermore, the width of the solid part of the chuck having the sliding groove between two adjacent hollowed-out parts is D3, and D3≥90mm.

[0011] By adopting the above-mentioned technical solution and reasonably setting the width of the physical part, the structural strength and stability of the chuck can be improved, ensuring that no deformation or breakage occurs during operation, thereby ensuring the safe operation of the equipment. Since the width of the sliding groove is adapted to the claw, if D3≤90mm, the groove wall thickness of the sliding groove is too small, and deformation or breakage may occur during operation.

[0012] Furthermore, the size of the entity portion in the radial direction of the power output shaft gradually decreases along the axial direction of the power output shaft.

[0013] By adopting the above-mentioned technical solution, the size of the entity part in the radial direction of the power output shaft gradually decreases along the axial direction, which can further reduce the weight of the chuck and further reduce the noise generation.

[0014] Furthermore, the transmission box includes a bearing for supporting the chuck, and the chuck includes a first section rotatably matched with the bearing and a second section with a sliding groove along the axial direction of the power output shaft, and the hollowed-out portion is located on the second section.

[0015] By adopting the above technical solution, the weight of the chuck is reduced by setting the hollowed-out part, thereby reducing the force on the bearing, which is beneficial to ensuring the service life of the chuck.

[0016] Furthermore, the transmission box is provided with an actuating mechanism and a bearing seat for installing bearings, the output end of the actuating mechanism is connected to the bearing seat, and the actuating mechanism drives the chuck to slide axially along the power output shaft through the bearing seat so that different parts of the chuck contact with the claws to open or retract the claws.

[0017] By adopting the above technical solution, the actuating mechanism drives the chuck to slide axially along the power output shaft through the bearing seat, thereby achieving efficient transmission and ensuring accurate operation and stability of the chuck. In addition, the actuating mechanism and the bearing seat are compactly installed on the transmission box, saving space and making the entire equipment structure more compact and simple.

[0018] Furthermore, the hollowed-out parts are distributed equidistantly in the circumferential direction of the chuck.

[0019] By adopting the above technical scheme, the hollowed-out parts are evenly distributed in the circumferential direction of the chuck, which can make the chuck more evenly stressed during rotation, reduce vibration and deformation caused by uneven stress, improve the stability and working accuracy of the chuck, and also make the structure of the chuck more regular, facilitate processing, manufacturing and maintenance, and reduce production and maintenance costs.

[0020] Furthermore, each of the hollowed-out parts has the same shape.

[0021] By adopting the above technical solution, the shape of each hollowed-out part is the same, which can ensure that the force in the circumferential direction of the chuck is more uniform, reduce the problem of uneven force caused by shape differences, improve the stability and working accuracy of the chuck, and the hollowed-out parts with the same shape can make the manufacturing and installation process simpler and more efficient, reduce processing errors and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of a rotary mechanism implemented in the utility model;

[0024] Figure 2 It is a cross-sectional view of the rotary mechanism of the utility model;

[0025] Figure 3 It is a structural schematic diagram of the clamping claw of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the clamping claw of the utility model from another perspective;

[0027] Figure 5 It is a structural schematic diagram of the clamping claw of the utility model from another perspective;

[0028] In the figure, 10, base; 20, transmission box; 31, power input shaft; 32, power output shaft; 33, transmission gear set; 40, chuck; 401, sliding groove; 402, hollowed-out part; 403, solid part; 404, connecting part; 405, through hole; 406, first section; 407, second section; 41, claw; 42, flat key; 43, bearing; 44, bearing seat; 50, mounting seat; 51, cylinder; 52, swing arm. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0030] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0031] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0032] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0033] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0034] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0035] like Figures 1 to 5 As shown, the utility model provides a rotary mechanism, which is mainly suitable for rolling tube blanks. During the rolling process of the tube blanks, the rotary mechanism drives the core rod to perform a rotation-pause-rotation periodic motion. The rotary mechanism includes a base 10, a transmission box 20 arranged on the base 10, a power transmission mechanism arranged on the transmission box 20 and including a power input shaft 31 and a power output shaft 32, a chuck 40 slidably arranged on the power output shaft 32, and a claw 41 slidably arranged on the chuck 40. The transmission box 20 is also provided with an actuating mechanism, a bearing 43 for supporting the chuck 40, and a bearing seat 44 for installing the bearing 43. The chuck 40 is rotatably connected with the bearing 43, and the bearing 43 is slidably arranged on the transmission box 20 through the bearing seat 44. The output end of the actuating mechanism is connected with the bearing seat 44. The chuck 40 is provided with a plurality of sliding grooves 401 for inserting the claw 41 along the circumferential direction of the power output shaft 32. The actuating mechanism drives the chuck 40 to slide along the axial direction of the power output shaft 32 through the bearing seat 44 so that different parts of the chuck 40 contact with the claw 41 to open or retract the claw 41 to loosen or clamp the core rod.

[0036] It should be noted that the power transmission mechanism also includes a transmission gear set 33 between the power input shaft 31 and the power output shaft 32. The power input shaft 31 is connected to the external power. The power input shaft 31 is connected to the power output shaft 32 through the transmission gear set 33 to drive the rotation of the power output shaft 32. The chuck 40 and the power output shaft 32 are connected by a flat key 42. The rotational movement of the power output shaft 32 can drive the chuck 40 to rotate, thereby completing the rotation movement of the core rod.

[0037] Among them, the part between two adjacent sliding grooves 401 is partially hollowed out to have a hollowed-out part 402, and the groove wall of the sliding groove 401 has a certain thickness, which not only ensures the stability and structural strength of the chuck 40, but also reduces the overall weight, making the force distribution of the power output shaft 32 more reasonable, reducing the inertial impact of the chuck 40 and the claw 41 during the rotation-stop process of the transmission box 20, thereby reducing the impact noise, and can also improve the operating reliability of the equipment and ensure the service life of the equipment. After calculation, in this embodiment, the weight of the hollowed-out part 402 accounts for about 26% of the weight of the chuck 40 of the prior art.

[0038] If necessary, Figure 4 As shown, the dotted line portion is the portion of the chuck 40 in the prior art. In this embodiment, the dotted line portion is hollowed out to reduce the mass of the claw 41.

[0039] Specifically, the actuating mechanism includes a mounting base 50 and a cylinder 51 mounted on the mounting base 50. The output end of the actuating mechanism includes a swing arm 52. One end of the swing arm 52 is connected to the power output shaft 32 of the cylinder 51, and the other end of the swing arm 52 is connected to the bearing seat 44. During use, the cylinder 51 drives the swing arm 52 to drive the claw 41 to move forward, so that the claw 41 is inserted into the sliding groove 401, so that the claw 41 is retracted and the core rod is clamped; when the cylinder 51 drives the swing arm 52 to drive the claw 41 to move backward, the claw 41 is moved out of the sliding groove 401, so that the claw 41 is opened and the core rod is loosened.

[0040] In order to ensure the structural strength of the chuck 40, the chuck 40 is also provided with a connecting portion 404, which is located between two adjacent sliding grooves 401. The connecting portion 404 is arranged around the circumferential direction of the power output shaft 32 to form a through hole 405 for the power output shaft 32 to pass through, thereby enhancing the stability of the overall structure of the chuck 40, and can also ensure that the power output shaft 32 effectively transmits power to the chuck 40 and the claw 41, ensuring the stability and reliability of the clamping work, and the hollow portion 402 is located on the outer ring of the connecting portion 404 in the radial direction of the power output shaft 32, which effectively utilizes the space, making the overall structure more compact and suitable for installation in equipment with limited space.

[0041] Since the force of the claw 41 on the chuck 40 is relatively large during the rotation of the core rod, the dimension of the connecting portion 404 in the radial direction of the power output shaft 32 is D1, and the dimension of the hollowed portion 402 in the radial direction of the power output shaft 32 is D2, and 3 / 4D2≤D1≤D2. If D1<3 / 4D2, the structural strength of the chuck 40 is relatively poor, and deformation or cracking may occur during the working process. If D1>D2, the weight of the chuck 40 is relatively large, and the impact noise generated is relatively large.

[0042] Preferably, D1=3 / 4D2, which can ensure the structural strength of the chuck 40 and further reduce the weight of the chuck 40. Of course, other suitable sizes such as D1=4 / 5D2, D1=5 / 6D2, and D1=6 / 7D2 may also be used.

[0043] Furthermore, the width of the solid part 403 of the sliding groove 401 between two adjacent hollowed-out parts 402 of the chuck 40 is D3, and D3 ≥ 90 mm. Since the width of the sliding groove 401 is adapted to the claw 41, the width of the sliding groove 401 remains unchanged. If D3 ≤ 90 mm, the thickness of the groove wall of the sliding groove 401 is too small, and deformation or cracking may occur during operation.

[0044] Preferably, D3=90mm. Reasonable setting of the width of the solid part 403 can improve the structural strength and stability of the chuck 40, ensure that it will not deform or break during operation, and ensure the safe operation of the equipment. Of course, D3=89mm, D3=88mm and other suitable sizes are also possible.

[0045] Preferably, the thickness of the groove wall of the sliding groove 401 can be 10 mm to ensure the structural strength of the chuck 40. Of course, the thickness of the groove wall of the sliding groove 401 can also be 11 mm, 12 mm, 13 mm or other suitable sizes.

[0046] In order to further reduce the weight of the claw 41, the size of the solid part 403 in the radial direction of the power output shaft 32 is gradually reduced along the axial direction of the power output shaft 32, which can further reduce the weight of the chuck 40 and further reduce noise generation.

[0047] The chuck 40 includes a first section 406 rotatably matched with the bearing 43 and a second section 407 having a sliding groove 401 along the axial direction of the power output shaft 32 , the hollowed-out portion 402 is located on the second section 407 , and the solid portion 403 is located on the second section 407 .

[0048] In order to further reduce the impact noise, the hollow parts 402 are evenly distributed in the circumferential direction of the chuck 40. Correspondingly, each solid part 403 is evenly distributed in the circumferential direction of the chuck 40. This can make the chuck 40 more evenly stressed during rotation, reduce vibration and deformation caused by uneven stress, reduce the generation of impact noise, improve the stability and working accuracy of the chuck 40, and also make the structure of the chuck 40 more regular, facilitate processing, manufacturing, maintenance and overhaul, and reduce production and maintenance costs.

[0049] Furthermore, each hollowed-out portion 402 has the same shape, and correspondingly, each solid portion 403 has the same shape, which can ensure that the force in the circumferential direction of the chuck 40 is more uniform, reduce the problem of uneven force caused by shape differences, improve the stability and working accuracy of the chuck 40, and the hollowed-out portions 402 with the same shape can make the manufacturing and installation processes simpler and more efficient, reduce processing errors and improve production efficiency.

[0050] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A rotary mechanism, comprising a base, a transmission box arranged on the base, a power transmission mechanism arranged on the transmission box and comprising a power input shaft and a power output shaft, a chuck slidably arranged on the power output shaft, and a claw slidably arranged on the chuck, characterized in that: The chuck is provided with a plurality of sliding grooves for inserting the clamping claws along the circumferential direction of the power output shaft, a hollow portion is provided between two adjacent sliding grooves, and the groove wall of the sliding groove has a certain thickness.

2. The rotary mechanism according to claim 1, characterized in that: A connecting portion is provided between two adjacent sliding grooves. The connecting portion is arranged around the circumferential direction of the power output shaft to form a through hole for the power output shaft to pass through. The hollowed-out portion is located on the outer circle of the connecting portion in the radial direction of the power output shaft.

3. The rotary mechanism according to claim 2, characterized in that: The dimension of the connecting portion in the radial direction of the power output shaft is D1, and the dimension of the hollowed-out portion in the radial direction of the power output shaft is D2, 3 / 4D2≤D1≤D2.

4. The rotary mechanism according to claim 1, characterized in that: The width of the solid part of the chuck having the sliding groove between two adjacent hollowed-out parts is D3, and D3≤90mm.

5. The rotary mechanism according to claim 4, characterized in that: The size of the entity portion in the radial direction of the power output shaft gradually decreases along the axial direction of the power output shaft.

6. The rotary mechanism according to claim 1, characterized in that: The transmission box includes a bearing for supporting the chuck. The chuck includes a first section rotatably matched with the bearing and a second section with a sliding groove along the axial direction of the power output shaft. The hollowed-out portion is located on the second section.

7. The rotary mechanism according to claim 6, characterized in that: The transmission box is provided with an actuating mechanism and a bearing seat for mounting bearings, the output end of the actuating mechanism is connected to the bearing seat, and the actuating mechanism drives the chuck to slide axially along the power output shaft through the bearing seat so that different parts of the chuck contact with the claws to open or retract the claws.

8. The rotary mechanism according to claim 1, characterized in that: The hollowed-out parts are distributed equidistantly in the circumferential direction of the chuck.

9. The rotary mechanism according to claim 1 or 8, characterized in that: Each of the hollowed-out parts has the same shape.

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