CN219336111U - Connector processing device - Google Patents

Abstract

The utility model relates to the technical field of light machining, in particular to a connector machining device which comprises a base, a first sliding table, a second sliding table and a second sliding table, wherein the first sliding table is arranged on the base, a clamping assembly is connected to the first sliding table in a sliding mode, a slot cutting motor is arranged above the first sliding table, the second sliding table is vertically arranged on one side of the first sliding table, the second sliding table is connected to the second sliding table in a sliding mode, a support is arranged on the second sliding table, one end of the support extends towards the first sliding table in a sliding mode beyond the second sliding table, a notch milling motor is arranged at the extending end of the support, so that the clamping assembly is utilized to drive the connector to translate, a slot is cut in the middle of the connector in the radial direction of the connector through a milling blade driven by the slot cutting motor, a milling cutter driven by the notch milling motor is enabled to mill into a notch from the bottom side of the second end of the connector in the axial direction of the connector, and accordingly a notch is enabled to face a notch which is opened downwards and is vertical to the slot.

Description

Connector processing device

Technical Field

The utility model relates to the technical field of light machining, in particular to a connector machining device.

Background

The pin jack connector (hereinafter referred to as the connector for short) is a tubular metal fitting for distinguishing male and female connectors for wire insertion, and various hole sites and slots are usually machined on the connector due to installation or male and female matching requirements, wherein the machining of a straight slot and a notch (commonly called milling R) at two ends of the connector respectively is included. In the common connector processing, a horizontal transverse movement of the connector is driven by a clamp to carry out cutting processing through a circular blade which horizontally rotates, and a notch is axially translated along the connector by a vertically rotating milling cutter to carry out milling processing on the left side or the right side of the connector, so that the opening orientation of the notch on the common connector is parallel to the horizontal transverse movement of the connector.

However, the connector has a plurality of application scenes, and the partial use scenes require that the opening orientation of the notch on the connector is perpendicular to the straight slot. However, the conventional connector processing apparatus is not convenient for processing such connectors, and therefore, how to provide a connector processing apparatus capable of processing a notch with an opening oriented perpendicular to a slot is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

(one) solving the technical problems

In order to overcome the defects in the prior art, the utility model provides a connector processing device which is convenient for processing a notch with an opening oriented to be perpendicular to a straight groove.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a connector processingequipment, includes base, slip table one, slip table two and slide two, slip table one sets up on the base, slip table one goes up the slip joint and has the clamping assembly who is used for the centre gripping connector, slip table one top is equipped with cuts open the groove motor, cut open the vertical downward of output shaft of groove motor, slip table two sets up in slip table one side along the horizontal direction is perpendicular, slip table two goes up the slip joint has slide two, be equipped with the support on the slide two, slide board two towards slip table one direction extension is crossed to support one end, the support extension end is equipped with mills the breach motor, it is parallel with slip table one to mill the output shaft of breach motor.

Preferably, the support is reverse L-shaped, the bending end at the top of the support extends towards the first direction of the sliding table beyond the second sliding plate, and the notch milling motor is arranged at the bottom side of the bending end of the support.

Preferably, the direction of the second sliding plate is in a vertical relation with the direction of the second sliding table, a central hole motor is arranged on one side of the support on the second sliding plate along the length direction of the second sliding plate, an output shaft of the central hole motor is arranged along the width direction of the second sliding plate, and an output shaft of the central hole motor faces the first sliding table.

Preferably, a point center motor is arranged on one side, far away from the support, of the center hole motor, an output shaft of the point center motor is arranged along the width direction of the sliding plate II, and the output shaft of the point center motor faces the sliding table I.

Preferably, a sliding table III is vertically arranged on the base at the other side of the sliding table I along the horizontal direction, a sliding plate III is connected to the sliding table III in a sliding way, a reaming motor is arranged on the sliding plate III, an output shaft of the reaming motor is arranged along the length direction of the sliding table III, and an output shaft of the reaming motor faces the sliding table I.

Preferably, the third sliding plate is in vertical relation with the third sliding table, a columnar necking piece is arranged on one side, away from the groove cutting motor, of the reaming motor, the necking piece is arranged along the width direction of the third sliding plate, and a conical hole is formed in one end, facing the first sliding table, of the necking piece.

Preferably, one side of the bending end at the top of the support is longitudinally provided with a sliding table IV, the sliding table IV is connected with a side hole motor in a sliding mode, and an output shaft of the side hole motor faces downwards vertically.

Preferably, the connector processing device further comprises a guide channel and a feeding cylinder, the guide channel is obliquely arranged on one side of the sliding table, the feeding cylinder is arranged at the bottom end of the guide channel, the feeding cylinder faces the first sliding table, a push rod of the feeding cylinder is in sliding connection with the bottom end of the guide channel, the bottom end of the guide channel can be connected with the clamping assembly, and the feeding cylinder is used for pushing out the connector conveyed to the bottom end of the guide channel onto the clamping assembly.

Preferably, the connector processing device further comprises a guide sleeve and a discharging cylinder, the guide sleeve is horizontally arranged on one side of the support, the direction of the guide sleeve is perpendicular to the direction of the first sliding table, the discharging cylinder is arranged at one end, far away from the first sliding table, of the guide sleeve, and a top rod of the discharging cylinder is sleeved in the guide sleeve towards the first sliding table.

Preferably, the bottom of base is equipped with telescopic heel brace and the universal wheel that sets up adjacent with the heel brace, heel brace and universal wheel all are equipped with a plurality of, the heel brace is along the bottom circumference equipartition of base, universal wheel and heel brace one-to-one setting.

(III) beneficial effects

The beneficial effects of the utility model are as follows: the connector is horizontally clamped on the first sliding table, the connector is horizontally moved along the first sliding table, a groove is cut in the middle of the connector along the radial direction of the connector by using the milling blade rotating on the output shaft of the groove cutting motor, then the connector can continue to move to the position of the notch milling motor along the first sliding table, then the second sliding plate is driven by the corresponding motor to slide along the second sliding table to be close to the first sliding table, the milling cutter rotating on the output shaft of the notch milling motor axially mills in from the bottom side of the second end of the connector along the connector, a notch with a downward opening is milled in the bottom side of the second end of the connector, and therefore the notch with an opening facing to be perpendicular to the groove is machined on the connector, so that complicated application situations of the connector can be adapted, and market demands can be met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and together with the embodiments of the utility model and do not constitute a limitation to the utility model, and in which:

FIG. 1 is a schematic view of the top of a base according to the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view at B in FIG. 1;

FIG. 4 is an enlarged view of FIG. 1 at C;

FIG. 5 is a schematic view of the top of the base according to the second embodiment of the present utility model;

FIG. 6 is a schematic view of the appearance of the bottom of the base in the present utility model;

fig. 7 is a schematic view of the appearance structure of the base of the present utility model after the center motor and the center hole motor are removed from the top.

In the figure: the device comprises a first sliding table, a base 10, a foot support 101, a universal wheel 102, a moving plate 11, a clamping plate 12, a clamping plate 13, a clamping groove 14, a sliding table 2, a sliding plate 21, a point 22 central motor, a central hole 23 motor, a bracket 24, a notch 25 milling motor, a sliding table 3, a sliding plate 31, a reaming motor 32, a necking piece 33, a conical hole 330, a sliding table 4, a side hole 41 motor, a slot 5 motor, a 61 material guide channel, a 62 material feeding cylinder, a 71 guide sleeve and a 72 material discharging cylinder.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, a connector processing device comprises a base 10, a first sliding table 1, a second sliding table 2 and a second sliding plate 21, wherein the first sliding table 1 is arranged on the base 10, a clamping assembly for clamping the connector is connected to the first sliding table 1 in a sliding way, a slot motor 5 is arranged above the first sliding table 1, an output shaft of the slot motor 5 faces downwards vertically, the second sliding table 2 is vertically arranged on one side of the first sliding table 1 along the horizontal direction, the second sliding table 2 is connected with the second sliding plate 21 in a sliding way, a support 24 is arranged on the second sliding plate 21, one end of the support 24 extends towards the first sliding table 1 beyond the second sliding plate 21, a notch milling motor 25 is arranged at the extending end of the support 24, and the output shaft of the notch milling motor 25 is parallel to the first sliding table 1.

Specifically, the slot cutting motor 5 is arranged above the first sliding table 1 through a mounting rack arranged on the other side of the first sliding table 1; the clamping assembly comprises a moving plate 11, a clamping plate I12 and a clamping plate II 13, wherein the moving plate 11 is slidably connected to the first sliding table 1, the clamping plate I12 is vertically fixed on one side of the top of the moving plate 11, the clamping plate II 13 is correspondingly arranged on one side of the clamping plate I12 and can be slidably attached to the clamping plate I12 along the length direction of the moving plate 11, the top of the clamping plate I12 and the top of the clamping plate II 13 are correspondingly provided with protruding blocks, the inner sides of the two protruding blocks are correspondingly provided with clamping grooves 14 which can be mutually surrounded to form round holes, one side of the top of the clamping plate I12 and one side of the top of the clamping plate II 13 are respectively provided with an inclined surface, and the two inclined surfaces are mutually flush to reduce the space occupation of the clamping plate I12 and the clamping plate II 13, so that components (such as a feeding mechanism or a manipulator) which need to be close to the clamping grooves 14 can be avoided; the first sliding table, the second sliding table and the second clamping plate 13 all use a motor as power, a screw rod is used as a driving piece, the screw rod is driven to rotate by the motor, and the screw rod threads are utilized to drive the corresponding sliding parts to slide; the output shaft of the slot cutting motor 5 is coaxially provided with a circular milling blade, the output shaft of the notch milling motor 25 is coaxially provided with a milling cutter, and the motors corresponding to the first sliding table 1, the second sliding table 2, the slot cutting motor 5, the notch milling motor 25 and the clamping component can all automatically operate through corresponding control panels, so that the connector processing device can automatically process a connector; the bracket 24 extends partially beyond the second slide plate 21 towards the first slide table 1, so that when the second slide plate 21 slides close to the first slide table 1, the notch milling motor 25 can translate to the position above the first slide table 1 along with the extending end of the bracket 24 to process the connector.

In this embodiment, when the connector is processed, the clamping plate two 13 and the clamping plate one 12 are driven by the corresponding motors to enclose and clamp the connector horizontally in the clamping groove 14, the connector and the sliding table one 1 are in vertical relation, then the clamping component slides along the sliding table one 1 under the driving of the corresponding motors, the first end of the connector passes through the output shaft of the slitting motor 5, the milling blade rotating on the output shaft of the slitting motor 5 cuts a straight slot in the middle of the connector along the radial direction of the connector, then the clamping component slides along the sliding table one 1, the connector moves to the notch milling motor 25, then the sliding plate two 21 slides along the sliding table two 2 to be close to the sliding table one 1 under the driving of the corresponding motors, and the milling cutter rotating on the output shaft of the notch milling motor 25 mills in the axial direction of the connector from the bottom side of the second end of the connector, so that a notch with a downward opening faces the notch vertical to the straight slot is milled on the connector, and the complex application scene of the connector is adapted to the market demand.

Further, the support 24 is in an inverted L shape, the bending end at the top of the support 24 extends towards the first sliding table 1 beyond the second sliding plate 21, and the notch milling motor 25 is arranged at the bottom side of the bending end of the support 24.

Further, the second slide plate 21 is vertically oriented to the second slide table 2, the second slide plate 21 is provided with a central hole motor 23 on one side of the bracket 24 along the length direction thereof, the output shaft of the central hole motor 23 is arranged along the width direction of the second slide plate 21, and the output shaft of the central hole motor 23 faces the first slide table 1.

Further, a point center motor 22 is arranged on one side of the center hole motor 23 away from the support 24, an output shaft of the point center motor 22 is arranged along the width direction of the sliding plate two 21, and the output shaft of the point center motor 22 faces the sliding table one 1.

Specifically, the bottom end of the bracket 24 is fixedly connected with the second slide plate 21; the point center motor 22 and the center hole motor 23 can automatically operate through corresponding control panels; the output shaft of the center hole motor 23 is coaxially provided with a center hole drill bit, and the output shaft of the spot center motor 22 is coaxially provided with a spot center drill bit; when the connector is machined, the clamping assembly slides to the position of the point center motor 22 along the first sliding table 1, the second end of the connector is aligned with the point center drill bit, then the second sliding plate 21 slides to be close to the first sliding table 1 along the second sliding table 2, the rotating point center drill bit drills a positioning hole at the second end of the connector, after the positioning hole machining is finished, the second sliding plate 21 slides to reset to enable the point center drill bit to be separated from the second end of the connector, then the clamping assembly continues to slide to the position of the center hole motor 23 along the first sliding table 1, the second sliding plate 21 slides to be close to the first sliding table 1 along the second sliding table 2 again, the rotating center hole drill bit drills a center hole at the second end of the connector, and therefore machining accuracy of the center hole of the connector is improved through the mode of machining the positioning hole.

Further, a sliding table three 3 is vertically arranged on the other side of the sliding table one 1 along the horizontal direction on the base 10, a sliding plate three 31 is connected to the sliding table three 3 in a sliding mode, a reaming motor 32 is arranged on the sliding plate three 31, an output shaft of the reaming motor 32 is arranged along the length direction of the sliding table three 3, and an output shaft of the reaming motor 32 faces the sliding table one 1.

Further, the third slide plate 31 is in a vertical relation with the third slide table 3, a cylindrical necking piece 33 is arranged on one side, away from the slitting motor 5, of the reaming motor 32, the necking piece 33 is arranged along the width direction of the third slide plate 31, and a conical hole 330 is formed in one end, facing the first slide table 1, of the necking piece 33.

Specifically, a reamer bit is coaxially provided on the output shaft of the reamer motor 32; the slitting motor 5, the reaming motor 32 and the necking piece 33 are sequentially arranged along the length direction of the first sliding table 1, when the clamping assembly entrains the connector to slide along the first sliding table 1, the connector can sequentially move to the position of the slitting motor 5, the reaming motor 32 and the necking piece 33 along the first sliding table 1, the connector moves along the first sliding table 1 along the clamping assembly, firstly carries out linear groove processing through the slitting motor 5, then continues to move to the position of the reaming motor 32, the reaming motor 32 slides along the third sliding table 3 along the third sliding table 31 to approach the connector, at the moment, the rotary reaming bit penetrates into the linear groove along the axial direction of the connector, so that symmetrical arc grooves are processed at the inner side of the first end of the connector, burrs at the inner side of the linear groove are removed, then the third sliding plate 31 reversely slides along the third sliding table 3 to reset to drive the reaming bit to separate from the connector, then the clamping assembly continues to slide along the first sliding table 1, so that the connector moves to align with the necking piece 33, at the moment, the third sliding plate 31 slides along the third sliding table 3 to approach the first sliding table 1, the third sliding table 31 slides along the sliding table to approach the connector, so that the first end of the connector stretches into the conical hole 330 and abuts against the inner wall 330, at the inner wall 330 gradually moves towards the inner wall of the tapered hole, the inner wall 33 gradually moves towards the inner wall of the tapered end of the connector, and the tapered end gradually slides towards the inner wall, thus the tapered end is gradually pressed towards the inner end of the tapered end of the connector, and the tapered end is gradually connected.

Further, a sliding table four 4 is longitudinally arranged on one side of the bending end at the top of the support 24, a side hole motor 41 is connected to the sliding table four 4 in a sliding mode, and an output shaft of the side hole motor 41 faces downwards vertically.

Specifically, a side hole drill bit is coaxially arranged on the output shaft of the side hole motor 41; the third sliding table 3 and the fourth sliding table 4 are powered by a motor, a screw rod is used as a driving piece, the screw rod is driven to rotate by the motor, and the screw rod threads are utilized to drive the corresponding sliding parts to slide; the motors corresponding to the sliding table III 3 and the sliding table IV can automatically operate through the corresponding control panel, so that the connector processing device can automatically process the connector; after the second end of the connector completes the point center and drilling operation, the clamping assembly drives the connector to move to the side hole motor 41 along the first sliding table 1, at the moment, the second sliding plate 21 slides along the second sliding table 2, so that the side hole motor 41 moves to the position above the second end of the connector, then the side hole motor 41 slides down along the fourth sliding table 4, a side hole drill bit rotating on an output shaft of the side hole motor 41 drills in from the top side of the second end of the connector, after the drilling is completed, the side hole motor 41 slides reversely along the fourth sliding table 4, so that the side hole drill bit is separated from the connector, then the second sliding plate 21 slides along the second sliding table 2 to be far away from the first sliding table 1, the clamping assembly continues to clamp the connector to move to the notch milling motor 25 along the first sliding table 1, the second sliding plate 21 slides along the second sliding table 2 to be close to the first sliding table 1, and a notch is processed on the bottom side of the second end of the connector through a milling cutter rotating on the output shaft of the notch milling motor 25.

Further, the connector processing device further comprises a guide channel 61 and a feeding cylinder 62, the guide channel 61 is obliquely arranged on one side of the first sliding table 1, the feeding cylinder 62 is arranged at the bottom end of the guide channel 61, the feeding cylinder 62 faces the first sliding table 1, a top rod of the feeding cylinder 62 is in sliding connection with the bottom end of the guide channel 61, the bottom end of the guide channel 61 can be connected with the clamping assembly, and the feeding cylinder 62 is used for ejecting the connector conveyed to the bottom end of the guide channel 61 onto the clamping assembly.

Specifically, the bottom end of the material guiding channel 61 is horizontally arranged towards the first sliding table 1 and is mutually perpendicular to the first sliding table 1; before connector processing, the clamping assembly slides to the bottom end of the guide channel 61 along the first sliding table 1, the top end of the guide channel 61 is connected with a vibration disc, the connector is placed in the vibration disc, the connector gradually moves to the bottom end of the guide channel 61 along the guide channel 61 through the vibration of the vibration disc, at the moment, the ejector rod of the feeding cylinder 62 slides and stretches out, the connector is ejected to the clamping groove 14 of the clamping assembly from the bottom end of the guide channel 61, and the feeding operation of the connector is completed.

Further, the connector processing device further comprises a guide sleeve 71 and a discharging air cylinder 72, wherein the guide sleeve 71 is horizontally arranged on one side of the support 24, the guide sleeve 71 is vertically arranged on one side of the sliding table I1, the discharging air cylinder 72 is arranged at one end, far away from the sliding table I1, of the guide sleeve 71, and a top rod of the discharging air cylinder 72 faces the sliding table I1 and is sleeved in the guide sleeve 71.

Specifically, after the notch processing is completed on the connector, the notch milling motor 25 slides along the second slide plate 21 to be separated from the connector, at this time, the clamping assembly slides along the first slide table 1 to enable the ejector rod of the connector pair Ji Xieliao air cylinder 72 and release the clamping of the connector, then the unloading air cylinder 72 drives the ejector rod to slide along the guide sleeve 71 to extend, the ejector rod abuts against the second end of the connector after extending and ejects the connector from the clamping groove 14, and the ejected connector falls into a corresponding collection pipeline to be recovered uniformly.

Further, the bottom of the base 10 is provided with telescopic foot supports 101 and universal wheels 102 adjacent to the foot supports 101, the foot supports 101 and the universal wheels 102 are all provided with a plurality of, the foot supports 101 are uniformly distributed along the circumferential direction of the bottom of the base 10, and the universal wheels 102 are arranged in one-to-one correspondence with the foot supports 101.

Specifically, under normal conditions, the foot support 101 is abutted against the ground, the universal wheel 102 is in a suspended state, at this time, the base 10 is stably placed on the ground through the foot support 101, and when a user needs to move the base 10, the user only needs to rotate the foot support 101 to retract upwards through threads, so that the universal wheel 102 is abutted against the ground, and the user can move the base 10 through the universal wheel 102.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A connector processing apparatus, comprising: the device comprises a base (10), a first sliding table (1), a second sliding table (2) and a second sliding plate (21);

the first sliding table (1) is arranged on the base (10), a clamping assembly for clamping the connector is connected to the first sliding table (1) in a sliding way, a groove cutting motor (5) is arranged above the first sliding table (1), and an output shaft of the groove cutting motor (5) faces downwards vertically;

the sliding table II (2) is vertically arranged on one side of the sliding table I (1) along the horizontal direction, a sliding plate II (21) is connected to the sliding table II (2) in a sliding way, a support (24) is arranged on the sliding plate II (21), one end of the support (24) extends towards the sliding table I (1) beyond the sliding plate II (21), a notch milling motor (25) is arranged at the extending end of the support (24), and an output shaft of the notch milling motor (25) is parallel to the sliding table I (1).

2. The connector processing device according to claim 1, wherein the bracket (24) is in an inverted L shape, a bent end at the top of the bracket (24) extends towards the first sliding table (1) beyond the second sliding plate (21), and the notch milling motor (25) is disposed at the bottom side of the bent end of the bracket (24).

3. The connector processing device according to claim 1, wherein the second slide plate (21) is oriented in a perpendicular relationship with the second slide table (2), a center hole motor (23) is provided on the second slide plate (21) on one side of the bracket (24) along the length direction thereof, an output shaft of the center hole motor (23) is provided along the width direction of the second slide plate (21), and an output shaft of the center hole motor (23) is oriented to the first slide table (1).

4. A connector processing apparatus according to claim 3, wherein a center hole motor (23) is provided with a point center motor (22) on a side away from the bracket (24), an output shaft of the point center motor (22) is provided along a width direction of the second slide plate (21), and an output shaft of the point center motor (22) faces the first slide table (1).

5. The connector processing device according to claim 1, wherein a third sliding table (3) is vertically arranged on the other side of the first sliding table (1) on the base (10), a third sliding plate (31) is slidably connected to the third sliding table (3), a reaming motor (32) is arranged on the third sliding plate (31), an output shaft of the reaming motor (32) is arranged along the length direction of the third sliding table (3), and an output shaft of the reaming motor (32) faces the first sliding table (1).

6. The connector processing device according to claim 5, wherein the third sliding plate (31) is in a vertical relationship with the third sliding table (3), a cylindrical necking piece (33) is arranged on one side, away from the grooving motor (5), of the reaming motor (32), the necking piece (33) is arranged along the width direction of the third sliding plate (31), and a conical hole (330) is formed in one end, facing the first sliding table (1), of the necking piece (33).

7. The connector processing device according to claim 2, wherein a sliding table four (4) is longitudinally arranged on one side of the bent end at the top of the bracket (24), a side hole motor (41) is slidingly connected to the sliding table four (4), and an output shaft of the side hole motor (41) faces downwards vertically.

8. Connector processing device according to claim 1, characterized in that it further comprises a guide channel (61) and a feeding cylinder (62);

the feeding cylinder (62) is arranged at the bottom end of the first sliding table (1), the feeding cylinder (62) faces the first sliding table (1), and the ejector rod of the feeding cylinder (62) is in sliding connection with the bottom end of the first sliding table (61);

the bottom end of the material guide channel (61) can be connected with the clamping assembly, and the feeding cylinder (62) is used for ejecting the connector conveyed to the bottom end of the material guide channel (61) onto the clamping assembly.

9. A connector processing device according to claim 1, characterized in that the connector processing device further comprises a guide sleeve (71) and a discharge cylinder (72);

the guide sleeve (71) is horizontally arranged on one side of the support (24), the direction of the guide sleeve (71) is in vertical relation with the direction of the first sliding table (1), the discharging cylinder (72) is arranged at one end, far away from the first sliding table (1), of the guide sleeve (71), and the ejector rod of the discharging cylinder (72) faces the first sliding table (1) and is sleeved in the guide sleeve (71).

10. The connector processing device according to claim 1, wherein the bottom of the base (10) is provided with telescopic footrests (101) and universal wheels (102) arranged adjacent to the footrests (101), the footrests (101) and the universal wheels (102) are all provided with a plurality of, the footrests (101) are uniformly distributed along the circumferential direction of the bottom of the base (10), and the universal wheels (102) are arranged in one-to-one correspondence with the footrests (101).

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