CN111955143A - Shrub and garden trimming means on lawn dual purpose - Google Patents

Abstract

The invention discloses a dual-purpose garden trimming device for shrubs and lawns. The motor is electrically connected; the caster assembly includes a front caster, a rear caster and two front and rear rollers, a front axle is connected between the front casters, a rear axle is connected between the rear casters, and the front casters are connected with both sides of the rear casters There is a support rod, and the roller is detachably connected to the front axle and the rear axle; the power output end of the motor extends to the bottom of the casing, the transmission mechanism is arranged at the bottom of the casing, the motor drives the transmission mechanism, and the first cutter is horizontally arranged on the machine On the transmission mechanism at the bottom of the casing, the second cutter is vertically arranged at both ends of the transmission mechanism on both sides of the casing. The invention adopts two trimming methods of plane and flank, which can not only trim the lawn, but also trim the bushes on both sides of the road, so as to realize the diversified operation requirements of a single type of equipment.

Description

A garden trimming device for shrubs and lawns

technical field

The invention relates to the technical field of garden equipment, in particular to a garden pruning device for shrubs and lawns.

Background technique

Garden trimming device, also known as lawn mower, lawnmower, weeding machine, etc., is a mechanical tool used for mowing lawns, vegetation and other mechanical tools. , control and other parts, the cutter head is equipped with a generator, the output shaft of the generator is equipped with a blade, and the blade uses the high-speed rotation of the generator to cut grass blades, which saves a lot of human resources under the action of such high-speed rotation and cutting. and weeding workers' working hours.

But at present, most of the garden trimming devices are four-wheel hand-push, hand-held and walking-type automatic lawn mowers. They are commonly used in household lawns, large-scale playgrounds and other flat ground operations. For small tree-like green vegetation, only manual pruning is required. Especially in recent years, more and more attention has been paid to urban greening. A large number of street tree vegetation appear on both sides of urban roads. Workers have brought a lot of workload. Secondly, many colleges and gardens have planted a large number of bushes that cannot be pruned in depth, and traditional weeders cannot assist workers in pruning, which brings great trouble to landscaping and urban pruning.

Therefore, it is necessary to invent a garden trimming device for shrubs and lawns to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a garden pruning device with a dual-purpose type of shrubs and lawns, which adopts two trimming methods of plane and side wings, which can not only trim the lawn, but also trim the shrubs on both sides of the road. A single device can Different trimming needs are met to solve the problems raised in the background art above.

To achieve the above object, the present invention provides the following technical solutions:

A dual-purpose garden trimming device for bushes and lawns, comprising a casing, a push handle, a caster assembly, a motor, a transmission mechanism and a cutter assembly;

The push handle is arranged on the casing, the top of the casing is provided with a groove, the power source is detachably arranged in the groove, and the power source is electrically connected with the motor through a wire;

The caster assembly includes a set of front casters, a set of rear casters and two front and rear rollers, a front wheel axle is connected between the front casters, a rear wheel axle is connected between the rear casters, and both sides of the front casters and the rear casters are connected with a support rod, one end of the support rod is connected to the two ends of the casing through the angle adjustment mechanism, and the roller is detachably connected to the front wheel axle and the rear wheel axle;

The motor is arranged on the casing, the power output end of the motor extends below the casing, the transmission mechanism is arranged at the bottom of the casing, the motor drives the transmission mechanism, and the transmission mechanism is drivingly connected to the front axle;

The cutter assembly includes a first cutter and a second cutter. The first cutter is horizontally arranged on the transmission mechanism at the bottom of the casing, and the second cutter is vertically arranged at both ends of the transmission mechanism on both sides of the casing. Both ends of the knife have mowing cords.

A further improvement scheme of the present invention is that the top of the casing is provided with a notch, the motor is fixedly connected to the upper edge of the notch through the lateral plate on the outside thereof, the output shaft of the motor is fixedly connected with a first cutter head, and the first cutter is fixed connected to the first cutter head.

A further improvement scheme of the present invention is that the transmission mechanism includes a bevel gear A, a horizontal shaft and a vertical shaft, the bevel gear A is fixedly connected to the output shaft of the motor, the bottom of the casing is symmetrically fixedly connected with a support, and the horizontal shaft passes through the bearing. The sleeve is rotatably connected to the support, and both ends of the horizontal shaft are fixedly connected with bevel gear B and bevel gear C, and both sides of the casing are fixedly connected with U-shaped blocks, the U-shaped blocks are provided with through holes, and the horizontal shaft passes through the through holes. Passing through the U-shaped block, the bevel gear C is located on the outside of the U-shaped block, and the bevel gear A meshes with the bevel gear B.

A further improvement scheme of the present invention is that the vertical shaft is fixedly connected in the tool seat through the bearing seat, the upper and lower ends of the vertical shaft are fixedly connected with a bevel gear D and a bevel gear E, the horizontal shaft extends into the tool seat, and the bevel gear D is fixedly connected to the upper and lower ends of the vertical shaft. The gear C is meshed with the bevel gear D; the inner side wall of the bottom of the cutter seat is rotatably connected with a cutter shaft, the bevel gear F at the rear end of the cutter shaft is meshed with the bevel gear E, the front end of the cutter shaft is fixedly connected with a second cutter head, the second cutter head is fixedly connected to the front end of the cutter shaft. The cutter is fixedly connected to the second cutter head.

A further improvement scheme of the present invention is that a driving sprocket is fixedly connected to the horizontal shaft, a driven sprocket is fixedly connected to the front wheel shaft, and a chain is drivingly connected between the driving sprocket and the driven sprocket.

A further improvement scheme of the present invention is that both ends of the first cutter and the second cutter are fixedly connected with threaded sleeves, the threaded sleeves are connected with bolts, the bolts are provided with at least one rope hole, and the mowing rope passes through the rope hole and Lock on the bolt.

A further improvement scheme of the present invention is that the roller comprises circular plates on both sides, a plurality of horns are connected between the outer edges of the circular plates, and support plates arranged obliquely are connected between adjacent horns; There is a mounting hole in the center of the circular plate, and a V-shaped bayonet is arranged on one side of the mounting hole, and the minimum opening size of the V-shaped bayonet is smaller than the inner diameter of the mounting hole. port and with mounting holes.

A further improvement scheme of the present invention is that the angle adjustment mechanism includes a spline keyboard and a spring, the end of the strut is fixedly connected to the spline sleeve, the spline sleeve is half-key teeth, and the side without the key teeth in the spline sleeve rotates connected to the casing; one end of the spring is fixedly connected to the casing, the other end is fixedly connected to the flower keyboard, the flower keyboard is engaged with the spline sleeve, and when the flower keyboard is pressed, the flower keyboard and the key teeth on the flower keyboard are separated to Turn the strut.

A further improvement scheme of the present invention is that the horizontal shaft is a telescopic structure, and when the horizontal shaft extends or retracts, the dimension of the distance between the two second cutters changes accordingly.

A further improvement scheme of the present invention is that the horizontal shaft includes an inner section and an outer section, the end of the inner section is fixedly connected with a hexagonal bushing, the end of the outer section has a hexagonal structure, and the outer section is inserted and connected to the outer section. Locked in the bushing, and the bushing is located at the opening of the U-shaped block.

Beneficial effects of the present invention:

First, the dual-purpose garden trimming device for bushes and lawns of the present invention adopts two trimming methods of plane and flank, which can not only trim the lawn, but also trim the shrubs on both sides of the road, and a single device can meet different needs. pruning needs.

Second, the dual-purpose garden trimming device for bushes and lawns of the present invention is simple and portable as a whole, scientific and reasonable in structure, low in design and processing costs, and convenient in use and maintenance.

Third, the dual-purpose garden trimming device for bushes and lawns of the present invention, the second cutter is easy to disassemble, and can quickly perform structural transformation of operations in different sites, which is convenient and fast, and has strong practicability.

Fourth, the dual-purpose garden trimming device for bushes and lawns of the present invention has roller-type front and rear support wheels, which increases the contact area between the vehicle body and the bushes, thereby floating the vehicle body on the bushes; It is installed on the front wheel axle and the rear wheel axle by way of connection, which is convenient for disassembly and assembly and improves the trimming efficiency.

Fifth, in the dual-purpose garden trimming device for bushes and lawns of the present invention, both ends of the first cutter and the second cutter are provided with mowing ropes to increase the coverage area of the cutters.

Sixth, the dual-purpose garden trimming device for shrubs and lawns of the present invention, the angle of the front and rear casters can be adjusted. When trimming the lawn, the distance between the first cutter and the ground can be adjusted by adjusting the front and rear casters, so as to meet different needs. High lawn mowing requirements; when trimming bushes, the roller is adjusted upwards, so that the lower opening of the roller is as parallel to the first cutter as possible.

Seventh, the dual-purpose garden trimming device for bushes and lawns of the present invention has a horizontal axis that can be extended and retracted, and can adjust the distance between the second cutters as required, thereby achieving bush trimming requirements of different widths.

Description of drawings

FIG. 1 is a front view of the overall structure of the present invention.

2 and 3 are perspective views of partial structures of the present invention.

4 and 5 are perspective views of the transmission mechanism of the present invention.

FIG. 6 is a schematic diagram of the structure of the casing of the present invention.

FIG. 7 is a schematic diagram of the structure of the roller of the present invention.

FIG. 8 is a schematic diagram of the structure of the second tool of the present invention.

FIG. 9 is a partial enlarged view of A in FIG. 8 .

FIG. 10 is a schematic diagram of the horizontal axis structure of the present invention.

FIG. 11 is a schematic diagram of the angle adjustment mechanism of the present invention.

In the picture: 1-chassis, 101-push handle, 102-groove, 103-buckle, 104-support, 105-U block, 2-caster assembly, 201-front caster, 202-rear caster, 203 -Roller, 2031-circular plate, 2032-spoke rod, 2033-support plate, 2034-bayonet, 2035-installation hole, 204-front axle, 205-rear axle, 206-support rod, 3-motor, 301- Output shaft, 302-horizontal plate, 4-transmission mechanism, 401-bevel gear A, 402-horizontal shaft, 4021-inner section, 4022-outer section, 4023-shaft sleeve, 403-vertical shaft, 404-bevel gear B, 405-bevel gear C, 406-bevel gear D, 407-bevel gear E, 408-bevel gear F, 409-drive sprocket, 410-driven sprocket, 411-chain, 5-tool assembly, 501-first Tool, 502-second tool, 503-first tool plate, 504-second tool plate, 505- tool seat, 506- tool shaft, 507- threaded sleeve, 508- bolt, 509- rope hole, 6- angle adjustment Mechanism, 601-spline keyboard, 602-spring, 603-spline sleeve.

Detailed ways

The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1: As shown in Figures 1 to 11, a garden trimming device for shrubs and lawns includes a casing 1, a push handle 101, a caster assembly 2, a motor 3, a transmission mechanism 4 and a cutter assembly 5; The push handle 101 is arranged on the casing 1, and the top of the casing 1 is provided with a groove 102. The power supply (not shown in the drawings) is detachably installed in the groove 102 through the buckle 103, and the power supply is connected to the groove 102 through a wire. The motor 3 is electrically connected; the caster assembly 2 includes a set of front casters 201 , a set of rear casters 202 and two front and rear rollers 203 . The axle 205, and the two sides of the front caster 201 and the rear caster 202 are connected with a support rod 206, one end of the support rod 206 is connected to the two ends of the casing 1 through the angle adjustment mechanism 6, and the roller 203 is detachably connected to the front wheel axle 204 and rear axle 205; the motor 3 is arranged on the casing 1, the power output end of the motor 3 extends to the bottom of the casing 1, the transmission mechanism 4 is arranged at the bottom of the casing 1, the motor 3 drives the transmission mechanism 4, and the transmission mechanism 4 Drive is connected to the front axle 204; the cutter assembly 5 includes a first cutter 501 and a second cutter 502, the first cutter 501 is horizontally arranged on the transmission mechanism 4 at the bottom of the casing 1, and the second cutter 502 is vertically arranged on the casing 1. Both ends of the transmission mechanism 4 on both sides, and both ends of the first cutter 501 and the second cutter 502 are provided with mowing ropes; the top of the casing 1 is provided with a gap, and the motor 3 is fixed by the lateral plate 302 on the outside thereof. Connected to the upper edge of the notch, the output shaft 301 of the motor 3 is fixedly connected with a first cutter head 503, and the first cutter 501 is fixedly connected to the first cutter head 503; the transmission mechanism 4 includes a bevel gear A401, a horizontal shaft 402 And the vertical shaft 403, the bevel gear A401 is fixedly connected to the output shaft 301 of the motor 3, the bottom of the casing 1 is fixedly connected to the support 104 symmetrically, the horizontal shaft 402 is rotatably connected to the support 104 through the bearing sleeve, and the horizontal shaft 402 Bevel gears B404 and C405 are fixedly connected at both ends, and U-shaped blocks 105 are fixedly connected to both sides of the casing 1. The U-shaped blocks 105 are provided with through holes, and the horizontal shaft 402 passes through the U-shaped blocks 105 through the through holes. The bevel gear C405 is located on the outside of the U-shaped block 105, and the bevel gear A401 is meshed with the bevel gear B404; the vertical shaft 403 is fixedly connected to the tool seat 505 through the bearing seat, and the upper and lower ends of the vertical shaft 403 are fixedly connected with the bevel gear D406 and the bevel gear D406. Bevel gear E407, the horizontal shaft 402 extends into the tool holder 505, and the bevel gear C405 is meshed with the bevel gear D406; the inner side wall of the bottom of the tool holder 505 is rotatably connected with a tool shaft 506, and the bevel gear F408 at the rear end of the tool shaft 506 Meshing with the bevel gear E407, the front end of the cutter shaft 506 is fixedly connected with the second cutter head 504, and the second cutter 502 is fixedly connected with the second cutter head 504; the horizontal shaft 402 is fixedly connected with the driving sprocket 409, the front wheel shaft 204 is fixedly connected with a driven sprocket 410, and a chain is drivingly connected between the driving sprocket 409 and the driven sprocket 410 Bar 411; both ends of the first cutter 501 and the second cutter 502 are fixedly connected with threaded sleeves 507, and bolts 508 are connected to the threaded sleeves 507. The bolts 508 are provided with at least one rope hole 509, and the mowing rope passes through the rope. holes 509 and locked on the bolts 508; the roller 203 includes circular plates 2031 on both sides, a number of horns 2032 are connected between the outer edges of the circular plates 2031, and inclined horns 2032 are connected between adjacent horns 2032 The supporting plate 2033 is provided; the center of the circular plate 2031 is provided with a mounting hole 2035, one side of the mounting hole 2035 is provided with a through V-shaped bayonet 2034, and the minimum opening size of the V-shaped bayonet 2034 is smaller than the mounting hole 2035 The inner diameter size of the front wheel shaft 204 and the rear wheel shaft 205 are opened to the V-shaped bayonet 2034 and the mounting hole 2035; the angle adjustment mechanism 6 includes a spline 601 and a spring 602, and the end of the support rod 206 is fixedly connected to the spline sleeve 603 , the spline sleeve 603 has half-key teeth, and the side without key teeth in the spline sleeve 603 is rotatably connected to the casing 1; one end of the spring 602 is fixedly connected to the casing 1, and the other end is fixedly connected to the splined keyboard 601. , the spline keyboard 601 is engaged with the spline sleeve 603, and when the spline keyboard 601 is pressed, the spline keyboard 601 and the key teeth on the spline keyboard 601 are separated to rotate the support rod 206.

Embodiment 2: This embodiment is a further improvement of Embodiment 1. The main improvement is that when Embodiment 1 is in use, the distance between the second cutters 502 on both sides of the casing 1 cannot be changed, which causes it to trim shrubs. However, in this embodiment, the above-mentioned defects can be avoided, specifically:

The horizontal axis 402 is a telescopic structure. When the horizontal axis 402 extends or retracts, the distance between the two second cutters 502 changes accordingly; the horizontal axis 402 includes an inner segment 4021 and an outer segment 4022, The end of the inner segment 4021 is fixedly connected with a hexagonal bushing 4023, the end of the outer segment 4022 is in a hexagonal structure, the outer segment 4022 is inserted and locked in the bushing 4023, and the bushing 4023 is located in the U-shaped block 105; when this embodiment is in use, the horizontal axis 402 can be extended and retracted, and the distance between the second cutters 502 can be adjusted according to needs, so as to meet the needs of bush trimming of different widths.

Except for this, this embodiment is exactly the same as Embodiment 1, and details are not repeated here.

The concrete working principle of the present invention is as follows:

①. When mowing the lawn, push it to the lawn, and adjust the height of the first cutter 501 from the ground according to the lawn height required by the site; when adjusting, press the splined keyboard 601 to make the splined keyboard 601 and the spline sleeve 603 The engaged key teeth are disengaged, so that the support rod 206 can be rotated to realize the angle adjustment of the front caster 201 and the rear caster 202, so as to achieve the purpose of adjusting the height of the first tool 501 from the ground; after the switch is turned on, the motor 3 works, so that the first A cutter 501 rotates to realize lawn mowing; in addition, the bevel gear A401 drives the bevel gear B404 to rotate, the horizontal shaft 402 rotates with the bevel gear B404, and the driving sprocket 409 of the horizontal shaft 402 drives the front wheel shaft 204 to rotate to realize the walking of the trimming device .

②. Before pruning the bushes, remove the push handle 101, install the knife seat 505 on both ends of the horizontal shaft 402, the bevel gear C405 is meshed with the bevel gear D406, and the roller 203 is clamped to the front axle 204 and the rear On the wheel shaft 205, the angle of the roller 203 is adjusted as in step ①; when trimming the bushes, the motor 3 works, so that the first cutter 501 rotates to realize the trimming of the top of the bushes; in addition, the bevel gear B404 drives the horizontal shaft 402 rotates, the horizontal shaft 402 drives the bevel gear C405 to rotate, the bevel gear C405 drives the vertical shaft 403 to rotate, and the vertical shaft 403 drives the cutter shaft 506 to rotate, so that the second cutter 502 rotates to achieve trimming on both sides of the bushes; The driving sprocket 409 drives the front wheel shaft 204 to rotate, and the roller 203 rotates following the horizontal shaft 402, so as to realize the walking of the trimming device on the bushes.

When the distance between the second tools 502 needs to be adjusted, it is only necessary to loosen the hexagonal countersunk head screw on the shaft sleeve 4023, pull or insert the outer section 4022 of the horizontal shaft 402, and tighten the hexagonal countersunk head screw.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent transformations or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. A dual-purpose garden trimming device for bushes and lawns, characterized in that it comprises a casing (1), a push handle (101), a caster assembly (2), a motor (3), a transmission mechanism (4) and Tool assembly (5); The push handle (101) is arranged on the casing (1), the top of the casing (1) is provided with a groove (102), and the power supply is detachably arranged in the groove (102) through a buckle (103), And the power supply is electrically connected with the motor (3) through wires; The caster assembly (2) includes a set of front casters (201), a set of rear casters (202), and two front and rear rollers (203). A rear axle (205) is connected between (202), and a support rod (206) is connected to both sides of the front caster (201) and the rear caster (202), and one end of the support rod (206) passes through the angle adjustment mechanism (6) is connected to both ends of the casing (1), and the roller (203) is detachably connected to the front axle (204) and the rear axle (205); The motor (3) is arranged on the casing (1), the power output end of the motor (3) extends below the casing (1), the transmission mechanism (4) is arranged at the bottom of the casing (1), and the motor (3) a drive transmission mechanism (4), the transmission mechanism (4) is drivingly connected to the front wheel shaft (204); The cutter assembly (5) includes a first cutter (501) and a second cutter (502), the first cutter (501) is horizontally arranged on the transmission mechanism (4) at the bottom of the casing (1), and the second cutter (502) ) vertically arranged at both ends of the transmission mechanism (4) on both sides of the casing (1), and both ends of the first cutter (501) and the second cutter (502) are provided with mowing ropes. 2 . The dual-purpose garden trimming device for bushes and lawns as claimed in claim 1 , wherein the top of the casing ( 1 ) is provided with a notch, and the motor ( 3 ) passes through the lateral plate on the outside of the casing ( 1 ). 3 . (302) is fixedly connected to the upper edge of the notch, the output shaft (301) of the motor (3) is fixedly connected with a first cutter head (503), and the first cutter (501) is fixedly connected to the first cutter head (503) . 3 . The dual-purpose garden trimming device for bushes and lawns according to claim 2 , wherein the transmission mechanism ( 4 ) comprises a bevel gear A ( 401 ), a horizontal shaft ( 402 ) and a vertical shaft. 4 . (403), the bevel gear A (401) is fixedly connected to the output shaft (301) of the motor (3), the bottom of the casing (1) is fixedly connected with a support (104) symmetrically, and the horizontal shaft (402) passes through the bearing sleeve It is rotatably connected to the support (104), and the two ends of the horizontal shaft (402) are fixedly connected with the bevel gear B (404) and the bevel gear C (405), and the two sides of the casing (1) are fixedly connected with U-shaped blocks ( 105), the U-shaped block (105) is provided with a through hole, the horizontal shaft (402) passes through the U-shaped block (105) through the through hole, and the bevel gear C (405) is located outside the U-shaped block (105). A (401) meshes with bevel gear B (404). 4. The dual-purpose garden trimming device for bushes and lawns according to claim 3, characterized in that: the vertical shaft (403) is fixedly connected in the cutter seat (505) through a bearing seat, and the vertical shaft ( The upper and lower ends of 403) are fixedly connected with bevel gear D (406) and bevel gear E (407), the horizontal shaft (402) extends into the tool seat (505), and the bevel gear C (405) meshes with the bevel gear D (406); a cutter shaft (506) is rotatably connected to the inner side wall of the bottom of the cutter seat (505), and the bevel gear F (408) at the rear end of the cutter shaft (506) meshes with the bevel gear E (407), and the cutter shaft ( The front end of 506) is fixedly connected with a second cutter head (504), and the second cutter (502) is fixedly connected to the second cutter head (504). 5. The dual-purpose garden trimming device for bushes and lawns according to claim 3, characterized in that: a driving sprocket (409) is fixedly connected to the horizontal shaft (402), and the front wheel shaft (204) A driven sprocket (410) is fixedly connected to the top, and a chain (411) is drivingly connected between the driving sprocket (409) and the driven sprocket (410). The dual-purpose garden trimming device for bushes and lawns according to claim 4, characterized in that: both ends of the first cutter (501) and the second cutter (502) are fixedly connected with threaded sleeves (507), a bolt (508) is connected in the threaded sleeve (507), the bolt (508) is provided with at least one rope hole (509), the mowing rope passes through the rope hole (509) and is locked on the bolt (508) superior. 7. The dual-purpose garden trimming device for bushes and lawns according to claim 1, wherein the roller (203) comprises circular plates (2031) on both sides, and the A plurality of horns (2032) are connected between the outer edges, and support plates (2033) arranged obliquely are connected between adjacent horns (2032); the center of the circular plate (2031) is provided with a mounting hole (2032). 2035), one side of the mounting hole (2035) is provided with a through V-shaped bayonet (2034), and the minimum opening size of the V-shaped bayonet (2034) is smaller than the inner diameter of the mounting hole (2035), the front axle (204) Spread the V-shaped bayonet (2034) with the rear axle (205) and connect it with the mounting hole (2035). 8 . The dual-purpose garden trimming device for bushes and lawns according to claim 1 , wherein the angle adjustment mechanism ( 6 ) comprises a flower keyboard ( 601 ) and a spring ( 602 ), a support rod ( 8 . The end of 206) is fixedly connected to the spline sleeve (603), the spline sleeve (603) has half-key teeth, and the side of the spline sleeve (603) without key teeth is rotatably connected to the housing (1); the One end of the spring (602) is fixedly connected to the casing (1), and the other end is fixedly connected to the splined keyboard (601). The splined keyboard (601) is separated from the key teeth on the splined keyboard (601) to rotate the support rod (206). 9 . The dual-purpose garden trimming device for bushes and lawns according to claim 4 , wherein the horizontal shaft ( 402 ) is a telescopic structure, and the horizontal shaft ( 402 ) extends or retracts. 10 . , the dimension of the distance between the two second tools (502) changes accordingly. 10. The dual-purpose garden trimming device for bushes and lawns according to claim 9, characterized in that: the horizontal shaft (402) comprises an inner segment (4021) and an outer segment (4022), and the inner segment (4022) The end of 4021) is fixedly connected with a hexagonal bushing (4023), the end of the outer segment (4022) is in a hexagonal structure, and the outer segment (4022) is inserted and locked in the bushing (4023), and The bushing (4023) is located at the opening of the U-block (105).

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