Thin-wall part tightening device

Abstract

The utility model discloses a thin-wall part tightening device which comprises a tightening mechanism, the tightening mechanism comprises a rotary driving part, a clamping assembly and a floating head capable of floating up and down and horizontally, the upper end of the floating head is connected with the rotary driving part, and the lower end of the floating head is connected with the clamping assembly. The thin-wall workpiece tightening device comprises a tightening mechanism, and a rotary driving piece in the tightening mechanism drives a clamping assembly to rotate around the axis of the clamping assembly through a floating head, so that a thin-wall workpiece clamped by the clamping assembly is driven to rotate, and tightening is achieved. The floating head can drive the clamping assembly to float in the vertical direction and the horizontal direction, alignment with a workpiece is facilitated, the device can adapt to the workpiece with the central axis deviating within a certain range, the axial deviation caused by machining and assembling of the device can be eliminated, and the structure is simple and effective. Compared with a manual tightening process, the thin-wall part tightening device is high in reliability, high in working efficiency and low in cost; compared with an existing tightening machine, alignment is convenient, and adaptability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of tightening devices, in particular to a tightening device for thin-walled parts. Background Art

[0002] At present, the tightening machines on the market are mostly for solid rod parts with high hardness such as bolts, and the requirements for the clamping force and force application method are not high. However, when tightening thin-walled parts, the tightening machines on the market cannot ensure that the thin-walled parts are evenly stressed, which can easily cause the thin-walled parts to deform. In the manufacturing process of thin-walled parts, the tightening process for large-sized thin-walled parts mostly adopts manual tightening. Manual assembly has human factors, and the control of tightening force depends entirely on the experience of workers, which is prone to defective products, and the assembly cycle is long, the efficiency is low, and the cost is high.

[0003] The Chinese invention patent with the authorization announcement number "CN 105945563 B" and the name "Tightening device for the latest assembly of tightening machine" discloses a tightening device with a tightening sensor and a tightening buffer, which has a high degree of automation, but the tightening device cannot slip and protect the tightened product in the event of an emergency. In addition, most tightening machines use fixed claws to grasp the tightening parts, move in the horizontal and vertical directions, and tighten them in alignment with the parts to be tightened. However, when aligning, especially when the offset is small, it is inconvenient to use a driving mechanism to drive the claws to move. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a thin-walled component tightening device with simple structure, convenient alignment and high reliability.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A thin-walled component tightening device comprises a tightening mechanism, wherein the tightening mechanism comprises a rotary drive member, a clamping assembly and a floating head capable of floating up and down and horizontally, wherein the upper end of the floating head is connected to the rotary drive member, and the lower end of the floating head is connected to the clamping assembly.

[0007] As a further improvement of the above technical solution: the floating head includes a first lifting guide and a first connecting seat, a first elastic member is provided inside the first lifting guide and a limiting portion is provided above the first elastic member, the lower end of the first elastic member abuts against the first connecting seat, and the upper end abuts against the limiting portion, a guide groove is provided on the side wall of the first lifting guide, and a rolling member cooperating with the guide groove is provided on the first connecting seat.

[0008] As a further improvement of the above technical solution: the floating head also includes a second connecting seat with a T-shaped structure, a accommodating cavity is provided in the first connecting seat, the upper end of the second connecting seat is arranged in the accommodating cavity and there is a gap between the outer periphery and the side wall of the accommodating cavity, the first connecting seat is provided with a plurality of second elastic members along the circumferential direction, the second elastic members are abutted against the second connecting seat, and the lower end of the second connecting seat is connected to the clamping assembly.

[0009] As a further improvement of the above technical solution: a connecting column is provided in the first connecting seat, and a through hole for the connecting column to pass through is provided on the second connecting seat, and a gap is provided between the through hole and the connecting column.

[0010] As a further improvement of the above technical solution: the clamping assembly includes an active disk and a driven disk that can rotate with the active disk, and latches are provided on two opposite sides of the driven disk.

[0011] As a further improvement of the above technical solution: a torque sensor is provided between the rotary drive member and the floating head.

[0012] As a further improvement of the above technical solution: a torque limiter is further provided between the rotary drive member and the floating head.

[0013] As a further improvement of the above technical solution: it also includes a lifting drive member, a second lifting guide member and a lifting seat arranged on the second lifting guide member, the lifting drive member is connected to the lifting seat, and the tightening mechanism is arranged on the lifting seat.

[0014] As a further improvement of the above technical solution: the rotary drive member is arranged horizontally and connected to the floating head through a reversible transmission assembly.

[0015] As a further improvement of the above technical solution: a clamping assembly is provided below the clamping assembly, and the clamping assembly is coaxially arranged with the clamping assembly.

[0016] Compared with the prior art, the utility model has the following advantages: the utility model discloses a thin-walled parts tightening device, including a tightening mechanism, in which the rotating driving member drives the clamping assembly to rotate around its own axis through a floating head, thereby driving the thin-walled workpiece clamped by the clamping assembly to rotate, thereby achieving tightening. The floating head can drive the clamping assembly to float in the vertical and horizontal directions, which is convenient for alignment with the workpiece, can adapt to workpieces with offset central axis within a certain range, and eliminate axial deviations caused by the processing and assembly of the equipment itself, and has a simple and effective structure. Compared with the manual tightening process, the thin-walled parts tightening device has strong reliability, high work efficiency and low cost; compared with the existing tightening machine, it is convenient for alignment and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the thin-walled parts tightening device of the utility model.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the thin-walled parts tightening device of the utility model.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the tightening mechanism in the utility model.

[0020] Figure 4 It is a partial cross-sectional structural schematic diagram of the tightening mechanism in the utility model.

[0021] The symbols in the figure represent:

[0022] 1. Tightening mechanism; 11. Rotating shaft; 12. Rotating driving member; 13. Transmission assembly; 15. Floating head; 151. First lifting guide member; 152. First connecting seat; 153. First elastic member; 154. Guide groove; 155. Rolling member; 156. Connecting column; 157. Second elastic member; 158. Second connecting seat; 16. Clamping assembly; 161. Active disk; 162. Driven disk; 163. Latch; 17. Torque sensor; 18. Torque limiter; 2. Lifting seat; 31. Lifting driving member; 32. Second lifting guide member; 4. Clamping assembly; 41. Pneumatic chuck; 42. Clamping claw. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] Figures 1 to 4 An embodiment of the thin-walled parts tightening device of the utility model is shown. The thin-walled parts tightening device of this embodiment includes a tightening mechanism 1, which includes a rotating drive member 12 (such as a commonly used motor, etc.), a clamping assembly 16 and a floating head 15 that can float up and down and horizontally. The upper end of the floating head 15 is connected to the rotating drive member 12, and the lower end of the floating head 15 is connected to the clamping assembly 16.

[0028] The thin-walled parts tightening device of this embodiment includes a tightening mechanism 1. The rotating driving member 12 in the tightening mechanism 1 drives the clamping assembly 16 to rotate around its own axis through the floating head 15, thereby driving the thin-walled workpiece (such as internally threaded or externally threaded thin-walled pipe fittings, etc.) clamped by the clamping assembly 16 to rotate to achieve tightening. The floating head 15 can drive the clamping assembly 16 to float in the vertical and horizontal directions, which is convenient for alignment with the workpiece, can adapt to workpieces with offset central axis within a certain range, and eliminate axial deviations caused by the processing and assembly of the equipment itself. The structure is simple and effective. Compared with the manual tightening process, the thin-walled parts tightening device has strong reliability, high work efficiency and low cost; compared with the existing tightening machine, it is convenient for alignment and has strong adaptability.

[0029] Furthermore, in this embodiment, the floating head 15 includes a first lifting guide 151 (such as a guide cylinder, a guide seat, etc.) and a first connecting seat 152. A first elastic member 153 (preferably a coil spring, or an elastic rubber block, etc.) is provided in the first lifting guide 151, and a limiting portion is provided above the first elastic member 153. The lower end of the first elastic member 153 abuts against the first connecting seat 152, and the upper end abuts against the limiting portion. A guide groove 154 is provided on the side wall of the first lifting guide 151, and a rolling member 155 cooperating with the guide groove 154 is provided on the first connecting seat 152. The first connecting seat 152 realizes an up-and-down floating connection with the first lifting guide 151 through the cooperation of the rolling member 155 and the guide groove 154, and with the help of the elastic force of the first elastic member 153, and the second connecting seat 158, the clamping assembly 16, etc. float up and down with the first connecting seat 152, and the structure is simple and effective. In addition to acting as a buffer when contacting materials, the up and down floating function can also provide a continuous downward pressing force for the tightening process to ensure the tightening effect.

[0030] Furthermore, in this embodiment, the floating head 15 also includes a second connection seat 158 ​​of a T-shaped structure, a receiving cavity is provided in the first connection seat 152, the upper end of the second connection seat 158 ​​is provided in the receiving cavity and a gap is provided between the outer periphery and the side wall of the receiving cavity, the first connection seat 152 is provided with a plurality of second elastic members 157 (preferably a spiral spring, or an elastic rubber block, etc.) along the circumference, the second elastic member 157 abuts against the second connection seat 158, and the lower end of the second connection seat 158 ​​is connected to the clamping assembly 16. The second connection seat 158 ​​can float in a horizontal plane relative to the first connection seat 152, and reset is achieved through the second elastic member 157, and the structure is simple and effective. The horizontal floating function enables the clamping assembly 16 to adapt to materials with a central axis offset within a certain range, and has strong compatibility.

[0031] Furthermore, in this embodiment, a connecting column 156 is provided in the first connecting seat 152, and a through hole is provided on the second connecting seat 158 ​​for the connecting column 156 to pass through, and there is a gap between the through hole and the connecting column 156. The upper and lower parts of the first connecting seat 152 can be connected by the connecting column 156, so that the second connecting seat 158 ​​can be installed in the first connecting seat 152. At the same time, the maximum horizontal floating amount of the second connecting seat 158 ​​can be limited by the cooperation of the connecting column 156 and the through hole, thus achieving two goals at one stroke.

[0032] As a preferred embodiment, the clamping assembly 16 includes an active disk 161 and a driven disk 162 that can rotate with the active disk 161, and latches 163 are provided on opposite sides of the driven disk 162. When in use, the latches 163 fix the thin-walled workpiece on the driven disk 162, and the active disk 161 and the driven disk 162 preferably transmit power through the gap teeth to drive the driven disk 162 and the thin-walled workpiece to rotate around their own axis to achieve tightening, which has a simple and effective structure.

[0033] Furthermore, in this embodiment, a torque sensor 17 is provided between the rotary drive member 12 and the floating head 15. The torque sensor 17 can monitor the torque output by the rotary drive member 12 in real time.

[0034] Furthermore, in this embodiment, a torque limiter 18 is provided between the rotary drive member 12 and the floating head 15. The torque limiter 18 can limit the maximum torque transmitted, and when an unexpected situation occurs and the torque surges, the device can slip to prevent damage to thin-walled workpieces, thereby further improving the reliability of the device. Preferably, the torque sensor 17, the rotating shaft 11, the torque limiter 18 and the transmission assembly 13 are connected in sequence to transmit the torque of the rotary drive member 12 to the clamping assembly 16.

[0035] In this embodiment, the thin-walled workpiece tightening device further includes a lifting drive member 31 (such as a cylinder, an electric cylinder, etc.), a second lifting guide member 32 (a guide column, a guide rail, etc.), and a lifting seat 2 disposed on the second lifting guide member 32. The lifting drive member 31 is connected to the lifting seat 2, and the tightening mechanism 1 is disposed on the lifting seat 2. The lifting drive member 31 can drive the lifting seat 2 and the tightening mechanism 1 to rise and fall as a whole, thereby achieving docking or separation of the clamping assembly 16 and the thin-walled workpiece. The second lifting guide member 32 provides a guiding function for the lifting seat 2, ensuring a stable and smooth lifting process with high motion accuracy.

[0036] As a preferred embodiment, the rotary drive member 12 is arranged horizontally and connected to the floating head 15 through a reversible transmission assembly 13 (such as a gear pair, etc.). The rotary drive member 12 is arranged horizontally to avoid interference with the lifting drive member 31, reduce the overall height of the device, and realize the transmission connection between the rotary drive member 12 and the floating head 15 through the reversal of the transmission assembly 13. The overall structure is simple and reasonable.

[0037] Furthermore, in this embodiment, a clamping assembly 4 is provided below the clamping assembly 16, and the clamping assembly 16 is coaxially arranged with the clamping assembly 4. The clamping assembly 16 cooperates with the clamping assembly 4, and is respectively used to fix the thin-walled workpiece to be tightened and the part (such as a threaded joint, etc.) that docks with the thin-walled workpiece, so as to facilitate tightening and docking. Preferably, the clamping assembly 4 adopts a pneumatic chuck 41, and a plurality of claws 42 are arranged circumferentially on the pneumatic chuck 41, which is conducive to ensuring that the parts docking with the thin-walled parts are evenly stressed, and a flexible pad (such as a rubber pad, a plastic pad, etc.) is provided on the claw 42 to prevent deformation due to clamping.

[0038] Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A device for tightening thin-walled parts, comprising a tightening mechanism (1), characterized in that: The tightening mechanism (1) comprises a rotating driving member (12), a clamping assembly (16) and a floating head (15) capable of floating up and down and horizontally. The upper end of the floating head (15) is connected to the rotating driving member (12), and the lower end of the floating head (15) is connected to the clamping assembly (16).

2. The thin-walled parts tightening device according to claim 1, characterized in that: The floating head (15) includes a first lifting guide member (151) and a first connecting seat (152). The first lifting guide member (151) is provided with a first elastic member (153) and a limiting portion is provided above the first elastic member (153). The lower end of the first elastic member (153) abuts against the first connecting seat (152), and the upper end abuts against the limiting portion. A guide groove (154) is provided on the side wall of the first lifting guide member (151), and a rolling member (155) cooperating with the guide groove (154) is provided on the first connecting seat (152).

3. The thin-walled component tightening device according to claim 2, characterized in that: The floating head (15) also includes a second connecting seat (158) of a T-shaped structure, the first connecting seat (152) is provided with a accommodating cavity, the upper end of the second connecting seat (158) is arranged in the accommodating cavity and there is a gap between the outer periphery and the side wall of the accommodating cavity, the first connecting seat (152) is provided with a plurality of second elastic members (157) along the circumferential direction, the second elastic members (157) are abutted against the second connecting seat (158), and the lower end of the second connecting seat (158) is connected to the clamping assembly (16).

4. The thin-walled component tightening device according to claim 3, characterized in that: A connecting column (156) is provided in the first connecting seat (152), and a through hole for the connecting column (156) to pass through is provided on the second connecting seat (158), and a gap is provided between the through hole and the connecting column (156).

5. The thin-walled component tightening device according to claim 1, characterized in that: The clamping assembly (16) comprises an active disk (161) and a driven disk (162) that can rotate along with the active disk (161), and latches (163) are provided on opposite sides of the driven disk (162).

6. The thin-walled component tightening device according to claim 1, characterized in that: A torque sensor (17) is provided between the rotary drive member (12) and the floating head (15).

7. The thin-walled component tightening device according to claim 6, characterized in that: A torque limiter (18) is also provided between the rotary drive member (12) and the floating head (15).

8. The thin-walled component tightening device according to claim 1, characterized in that: It also comprises a lifting drive member (31), a second lifting guide member (32) and a lifting seat (2) arranged on the second lifting guide member (32); the lifting drive member (31) is connected to the lifting seat (2); and the tightening mechanism (1) is arranged on the lifting seat (2).

9. The thin-walled component tightening device according to claim 8, characterized in that: The rotary drive member (12) is arranged horizontally and is connected to the floating head (15) via a reversible transmission assembly (13).

10. The thin-walled component tightening device according to any one of claims 1 to 9, characterized in that: A clamping assembly (4) is provided below the clamping assembly (16), and the clamping assembly (16) and the clamping assembly (4) are coaxially arranged.

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