Large-stroke inner cavity clamping device for lathe machining of bus shell

Abstract

The utility model discloses a large-stroke inner cavity clamping device for lathe machining of a bus shell, which comprises a plurality of fixed supporting arms which are uniformly arrayed in a circumferential manner, and movable supporting arms are arranged on the fixed supporting arms in a sliding manner in a one-to-one correspondence manner; the sliding direction of the movable supporting arms is the extending direction of the corresponding fixed supporting arms, the adjusting assembly is used for driving the multiple movable supporting arms to move synchronously, and the outer side ends of the movable supporting arms are detachably connected with supporting heads. The supporting heads are designed into multiple groups of different heights, the supporting heads with different heights are adaptively selected according to bus shells with different inner diameters machined by a lathe and are replaced on the movable supporting arms, so that the clamping diameter of an inner cavity of the device is increased or reduced, the applicability of the device is improved, a standby device is not needed, and the cost input is reduced; only the supporting head needs to be replaced, the whole device does not need to be detached from an external driving device, and labor and replacement time are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing technology, specifically to a large-stroke inner cavity clamping device for machining busbar housings on a lathe. Background Technology

[0002] The aluminum high-voltage housing of GIS (Gas Insulated Switchgear) is one of the key components of gas-insulated switchgear.

[0003] In the production process of GIS aluminum high-voltage housing, the main cylindrical part of the high-voltage housing is also called the busbar housing. After the busbar housing is welded into a cylinder, the outer and inner walls of the housing need to be polished. Rolling polishing is usually used when polishing the outer wall.

[0004] Existing technologies typically use three-jaw or four-jaw chucks to clamp and support the inner wall of the busbar housing. However, due to different models, the diameter of the inner wall of the busbar housing varies for different models of GIS aluminum high-voltage housings. Therefore, when grinding different models of busbar housings, it is necessary to frequently replace the entire chuck. Firstly, the overall disassembly and assembly requires a large amount of labor and replacement time. Secondly, it is necessary to prepare multiple chucks of different models for backup, which increases the cost. Utility Model Content

[0005] The purpose of this utility model is to provide a large-stroke inner cavity clamping device for machining busbar housings on a lathe, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a large-stroke inner cavity clamping device for machining busbar housings on a lathe, comprising a plurality of fixed support arms arranged in a uniform circular array, wherein each of the plurality of fixed support arms is slidably provided with a movable support arm corresponding to it, the sliding direction of the movable support arm being the extension direction of the corresponding fixed support arm, and further comprising an adjustment component for driving the plurality of movable support arms to move synchronously, the adjustment component being fixedly connected to the fixed support arms.

[0007] Preferably, the adjusting assembly includes a mounting shell fixed relative to the fixed support arm, a worm gear and a worm cooperating with the worm gear are rotatably disposed inside the mounting shell, and a threaded through hole is coaxially disposed on the worm gear shaft of the worm gear; the adjusting assembly also includes a screw cooperating with the threaded through hole, and drive arms corresponding one-to-one with the movable support arm are disposed around the screw, a dovetail slider is disposed at the suspended end of the drive arm, a connecting part is disposed on the side of the movable support arm facing the drive arm, and a dovetail guide groove is disposed on the connecting part that extends obliquely and slides with the dovetail slider.

[0008] Preferably, the multiple fixed support arms are connected by the same connecting seat, specifically the connecting seat is a central seat, and the multiple fixed support arms are evenly welded around the central seat.

[0009] Preferably, the fixed support arm is provided with a sliding groove, the extension direction of the sliding groove is the extension direction of the fixed support arm, and the movable support arm is slidably disposed in the sliding groove.

[0010] Preferably, the fixed support arm and the mounting shell are connected by a connecting frame, one end of which is welded to the fixed support arm and the other end of which is welded to the mounting shell.

[0011] Preferably, in this embodiment, the screw passes through the mounting shell and is connected to the threaded through hole, and the mounting shell is provided with a clearance hole for the screw to pass through.

[0012] Preferably, the mounting housing has a screw cover on the side away from the drive arm to shield the screw, and the screw cover is preferably cylindrical.

[0013] Preferably, one end of the worm gear shaft passes through the mounting housing and extends to the outside of the mounting housing, and the portion of the shaft extending to the outside of the mounting housing is configured with a square head.

[0014] Preferably, it also includes a screwing component for driving the square head to rotate. The screwing component includes an adjusting rod, one end of which is provided with a square head groove corresponding to the square head, and the other end of which is provided with a handle.

[0015] Preferably, the outer end of the movable support arm is detachably connected to a support head.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model designs the support head with multiple sets of different heights. The support head of different heights can be adapted to the different inner diameters of the busbar housing processed by the lathe and replaced on the movable support arm. This increases or decreases the inner cavity clamping diameter of the device, increases the applicability of the device, eliminates the need for spare devices, and reduces cost investment.

[0018] 2. According to different inner diameters of busbar housings, this utility model only requires replacing the support head, without disassembling the entire device from the external drive unit, which greatly reduces labor and replacement time.

[0019] 3. In this utility model, the top surface of the support head is an arc-shaped structure. The arc-shaped structure design can better fit with the inner wall of the busbar housing, increase the contact area with the inner wall of the busbar housing when clamping the busbar housing, and increase the clamping stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 (The movable support arm retracts);

[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 (The active support arm extends);

[0022] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 (The movable support arm retracts);

[0023] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 4 (The active support arm extends);

[0024] Figure 5 This is an exploded view of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the movable support arm of this utility model;

[0026] Figure 7 This is a diagram illustrating the arrangement of the threaded hole in this utility model.

[0027] Figure 8 This is a diagram showing the internal structure of the adjustment component of this utility model;

[0028] Figure 9 This is an exploded view showing the fit between the screw and the threaded through hole of this utility model.

[0029] Figure 10 This is a schematic diagram of the structure of the adjusting rod of this utility model;

[0030] Figure 11 This is a diagram illustrating how the present utility model is used.

[0031] In the picture:

[0032] 1-Fixed support arm, 11-Connecting frame, 12-Slide groove, 13-Center seat,

[0033] 2-Modible support arm, 21-Connecting part, 22-Dovetail guide groove, 23-Threaded hole,

[0034] 3-Screw, 31-Drive arm, 32-Dovetail slider, 33-Stabilizer bar

[0035] 41-Mounting housing, 42-Worm gear, 421-Worm gear shaft, 422-Threaded through hole, 43-Worm, 431-Square head, 44-Shaft seat one, 45-Shaft seat two, 46-Screw cover,

[0036] 5-Support head, 51-Threaded connector

[0037] 61-Adjusting rod, 62-Square head groove, 63-Handle;

[0038] 7-Busbar housing. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] like Figures 1 to 9 As shown, a large-stroke inner cavity clamping device for machining busbar housings on a lathe includes multiple fixed support arms 1 arranged in a uniform circular array. Each of the multiple fixed support arms 1 is slidably provided with a movable support arm 2, and the sliding direction of the movable support arm 2 is the extension direction of the corresponding fixed support arm. The device also includes an adjustment component for driving the multiple movable support arms 2 to move synchronously, and the adjustment component is fixedly connected to the fixed support arms 1.

[0041] In one specific embodiment, the adjustment assembly includes a mounting shell 41 fixed relative to the fixed support arm 1. A worm gear 42 and a worm 43 cooperating with the worm gear 42 are rotatably disposed inside the mounting shell 41. The worm gear shaft 421 of the worm gear 42 is coaxially provided with a threaded through hole 422. The adjustment assembly also includes a screw 3 cooperating with the threaded through hole 422. Around the screw 3, there are drive arms 31 corresponding one-to-one with the movable support arm 2. A dovetail slider 32 is provided at the suspended end of the drive arm 31. A connecting part 21 is provided on the side of the movable support arm 2 facing the drive arm 31. A dovetail guide groove 22 is provided on the connecting part 21, which extends obliquely and slides with the dovetail slider 32.

[0042] Specifically in this embodiment, such as Figures 1 to 4 As shown, the multiple fixed support arms 1 can be directly connected or connected through the same connecting seat. In this embodiment, the multiple fixed support arms 1 are preferably connected through the same connecting seat, specifically the connecting seat is the center seat 13, and the multiple fixed support arms 1 are evenly welded around the center seat 13.

[0043] Specifically in this embodiment, such as Figure 5 As shown, the fixed support arm 1 is provided with a sliding groove 12, the extension direction of the sliding groove 12 is the extension direction of the fixed support arm 1, and the movable support arm 2 is slidably disposed in the sliding groove 12.

[0044] Specifically in this embodiment, such as Figures 1 to 4 As shown, the fixed support arm 1 and the mounting shell 41 are connected by a connecting frame 11. One end of the connecting frame 11 is welded to the fixed support arm 1, and the other end of the connecting frame 11 is welded to the mounting shell 41.

[0045] Specifically in this embodiment, such as Figure 5 , Figure 8 and 9 As shown, the mounting housing 41 is provided with a first bearing seat 44 and a second bearing seat 45 whose axes are arranged perpendicular to each other. The worm gear 42 is rotatably connected to the first bearing seat 44 through the worm gear shaft 421, and the rod shaft of the worm 43 is rotatably connected to the second bearing seat 45.

[0046] It should be noted that in this embodiment, the screw 3 passes through the mounting shell 41 and is connected to the threaded through hole 422. The mounting shell 41 is adaptively designed with a clearance hole (not shown in the figure) for the screw 3 to pass through.

[0047] Furthermore, a screw cover 46 for shielding the screw 3 is provided on the side of the mounting shell 41 away from the drive arm 31. The screw cover 46 preferably adopts a cylindrical structure to facilitate coupling between the screw cover 46 and an external rotation drive device. The thickness and connection strength of the mounting shell 41 and the screw cover 46 are determined through adaptive design to ensure that the load-bearing strength of the mounting shell 41 and the screw cover 46 can fully withstand the driving force that drives the entire device to rotate.

[0048] Specifically, in this embodiment, one end of the worm gear 43 passes through the mounting housing 41 and extends to the outside of the mounting housing 41. The part of the worm gear extending to the outside of the mounting housing 41 is configured as a square head 431 so that the square head 431 can be turned by the screwing component to adjust the rotation of the worm gear 43.

[0049] In one specific embodiment, the screwing component includes an adjusting rod 61. One end of the adjusting rod 61 is provided with a square head groove 62 corresponding to the square head 431, and the other end of the adjusting rod 61 is provided with a handle 63. When the adjusting worm gear 43 rotates, the corresponding square head groove 62 on the adjusting rod 61 is inserted into the square head 431, and then the adjusting worm gear 43 can be rotated by turning the handle 63.

[0050] Furthermore, such as Figures 5 to 8 As shown, the outer end of the movable support arm 2 (with the end of the movable support arm 2 away from the corresponding fixed support arm 1 as the outer end) is detachably connected to a support head 5. The top surface of the support head 5 is an arc-shaped structure. The arc-shaped structure design can better fit with the inner wall of the busbar housing, increase the contact area with the inner wall of the busbar housing when clamping the busbar housing, and increase the clamping stability.

[0051] Specifically, the support head 5 and the movable support arm 2 are connected by threads. The bottom of the support head 5 is provided with a threaded connector 51, and the outer end of the movable support arm 2 is provided with a threaded hole 23 that mates with the threaded connector 51. In this way, the support head 5 can be designed with multiple sets of different heights. Depending on the different inner diameters of the busbar housings being machined on the lathe, different heights of the support head 5 can be selected and replaced on the movable support arm 2, thereby increasing or decreasing the inner cavity clamping diameter of the device and increasing the applicability of the device.

[0052] Furthermore, the screw 3 extends toward the side of the fixed support arm 1 and is designed with a stabilizing rod 33. The center seat 13 is provided with a corresponding insertion hole (not shown in the figure) for the stabilizing rod 33. The stabilizing rod 33 is slidably disposed in the insertion hole. The stabilizing rod 33 plays a guiding role when the screw 3 moves, and at the same time increases the overall stability of the device.

[0053] Working principle: During use, the screw cover 46 is coupled with an external rotation drive device, which drives the entire device to rotate. When clamping the busbar housing, two sets of this device are used to clamp one busbar housing.

[0054] First, the busbar housing is lifted using a hoisting device. Then, the two corresponding devices are positioned inside the inner cavity of the busbar housing 7 by adjusting their positions. Next, the worm gear 43 is rotated using a screwing device. The worm gear 43 drives the worm wheel 42 and worm wheel shaft 421 to rotate. Simultaneously, the rotation of the worm wheel shaft 421 drives the screw 3 to move back and forth through the threaded through hole 422. During this movement, the screw 3 moves the drive arm 31 away from or towards the movable support arm 2. At the same time, the dovetail slider 32 moves relative to the dovetail guide groove 22. Since the dovetail guide groove 22 is inclined relative to the screw 3, under the decomposed force of the driving force, the dovetail slider 32 pushes the movable support arm 2, ultimately causing the movable support arm 2 and the support head 5 to extend outwards or retract inwards. The specific direction of movement can be controlled by adjusting the screwing direction of different square heads 431.

[0055] When clamping the busbar housing 7, the movable support arm 2 and the support head 5 extend outward until each support head 5 presses against the inner wall of the busbar housing. Then, the external rotation drive device drives the device and the busbar housing to rotate, which can polish the outer wall of the busbar housing.

[0056] After grinding, when disassembling the busbar housing 7, first re-hoist the busbar housing and provide appropriate lifting force. Then, rotate the square head 431 in the opposite direction to make the movable support arm 2 and the support head 5 retract inward, so that the support arm 2 and the support head 5 are separated from the inner wall of the busbar housing. Then, move the device out of the inner cavity of the busbar housing, and finally transfer the ground busbar housing away.

[0057] When the support head 5 needs to be replaced, unscrew the original support head 5 and then replace it with a new and suitable support head 5 according to the inner diameter of the busbar housing.

[0058] (It should be noted that, to allow the two devices to enter the busbar housing 7, the external drive device can be designed to be slidable, so that the distance between the two drive devices and the corresponding devices can be adjusted. The above-mentioned setting method is a conventional technology and is not within the scope of this utility model. Its specific setting method will not be described in detail.)

[0059] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A large-stroke inner cavity clamping device for machining busbar housings on a lathe, characterized in that: It includes multiple fixed support arms arranged in a uniform circular array, and each of the multiple fixed support arms is slidably provided with a movable support arm corresponding to it. The sliding direction of the movable support arm is the extension direction of the corresponding fixed support arm. It also includes an adjustment component for driving the multiple movable support arms to move synchronously. The adjustment component is fixedly connected to the fixed support arms. The adjustment assembly includes a mounting shell fixed relative to the fixed support arm. A worm gear and a worm cooperating with the worm gear are rotatably disposed inside the mounting shell. A threaded through hole is coaxially disposed through the worm gear shaft. The adjustment assembly also includes a screw cooperating with the threaded through hole. Drive arms corresponding to the movable support arms are disposed around the screw. A dovetail slider is disposed at the suspended end of the drive arm. A connecting part is disposed on the side of the movable support arm facing the drive arm. A dovetail guide groove is disposed on the connecting part, which extends at an inclination and slides with the dovetail slider. The outer end of the movable support arm is detachably connected to a support head.

2. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 1, characterized in that: The multiple fixed support arms are connected by the same connecting seat, specifically the connecting seat is a central seat, and the multiple fixed support arms are evenly welded around the central seat.

3. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 1, characterized in that: The fixed support arm is provided with a sliding groove, the extension direction of the sliding groove is the extension direction of the fixed support arm, and the movable support arm is slidably disposed in the sliding groove.

4. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 1, characterized in that: The fixed support arm and the mounting shell are connected by a connecting frame, one end of which is welded to the fixed support arm and the other end of which is welded to the mounting shell.

5. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 1, characterized in that: The screw passes through the mounting housing and is connected to the threaded through hole. The mounting housing is provided with a clearance hole for the screw to pass through.

6. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 5, characterized in that: The mounting housing has a screw cover on the side away from the drive arm to shield the screw, and the screw cover has a cylindrical structure.

7. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 1, characterized in that: One end of the worm gear shaft passes through the mounting housing and extends to the outside of the mounting housing, and the portion of the shaft extending to the outside of the mounting housing is square-headed.

8. The large-stroke inner cavity clamping device for machining busbar housings on a lathe according to claim 7, characterized in that: It also includes a screwing component for driving the square head to rotate. The screwing component includes an adjusting rod, one end of which is provided with a square head groove corresponding to the square head, and the other end of which is provided with a handle.

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