CN209355142U - A kind of safe and reliable city intelligent illuminating street lamp - Google Patents

Abstract

The utility model discloses a kind of safe and reliable city intelligent illuminating street lamps, lamp stand is hollow shape structure, one deceleration motor integrating is laterally set in lamp stand, one telescoping mechanism is set on the output shaft of deceleration motor integrating, one first bevel gear is set on the telescopic end of telescoping mechanism, end-side teeth is provided in the outer end wall of first bevel gear, one horizontal gear of rotation setting on the tube wall of lamp stand, horizontal gear outboard end protrudes from the tube wall certain distance of lamp stand, inner end engagement one screw rod of connection of horizontal gear, a face gear is arranged in the end of screw rod, end-side teeth selective connection on face gear and the first bevel gear；Electronic bill-board is set on lamp stand by annular sleeve, annular sleeve is rotatably arranged on lamp stand periphery, and ring gear is set on the internal perisporium of at least one annular sleeve, ring gear is engaged with the outside protruding end of horizontal gear, and deceleration motor integrating drives electronic bill-board rotation.The utility model improves the wind loading rating of lamp stand and electronic bill-board.

Description

A kind of safe and reliable city intelligent illuminating street lamp

Technical field

The utility model relates to illuminating street lamp technical fields, and more specifically, the utility model relates to a kind of safe and reliable City intelligent illuminating street lamp.

Background technique

Solar energy be it is inexhaustible, cleanliness without any pollution and the reproducible environmentally protective energy utilize solar energy Power generation, unrivaled spatter property, the safety of height, the opposite popularity of the energy and adequacy, long-life and non-maintaining Advantage not available for other conventional energy resources such as property, photovoltaic energy is considered as 21st century most important new energy, and too Positive energy streetlight without be laid with cable, without Alternating Current Power Supply, do not generate the electricity charge；Using direct current supply, control；Good with stability, Service life is long, luminous efficiency is high, installation maintenance simplicity, security performance height, energy conservation and environmental protection, it is economical and practical the advantages that.

In order to make full use of solar energy resources, it is equipped with solar panel on many street lamps at present, it is mutual to form photoelectricity Benefit property road lamp system, meanwhile, with the development of trend, electronic bill-board is configured on street lamp, to be built into wisdom illumination Street lamp, but at present for there are problems that two o'clock, first, solar panel be it is fixed, cannot turn with the transfer of light Dynamic, generating efficiency is not high；The second, the surface area of electronic bill-board is big, when occur wind speed it is excessive when, billboard can shake even this Section falls the driving safety on crisis road, while the wind resistance on billboard will increase the shaking of lamp stand, increases lamp cap damage The probability to fracture with lamp stand.

Utility model content

One purpose of the utility model is to solve at least the above problems, and provide the advantages of at least will be described later.

There are one purposes to be to provide a kind of safe and reliable city intelligent illuminating street lamp for the utility model, sets in lamp stand It is equipped with rotating driving system, which can drive the solar tracking campaign of solar panel, to realize solar-electricity The maximum power of pond plate generates electricity, and can drive electronic bill-board, when wind speed is excessive, can pass through the rotating driving system Adjust the steering of electronic bill-board and solar panel, by electronic bill-board and solar panel adjust to wind direction It is identical, the wind resistance on electronic bill-board and solar panel is reduced, to reduce the wind resistance of lamp stand entirety, this is practical new Type improves the wind loading rating of lamp stand and electronic bill-board.

In order to realize these purposes and other advantages according to the present utility model, a kind of safe and reliable city intelligence is provided Intelligent illuminating street lamp, comprising:

Lamp stand is hollow shape structure, a deceleration motor integrating, the deceleration motor integrating is laterally arranged in the lamp stand Output shaft on a telescoping mechanism is set, one first bevel gear, first umbrella tooth are set on the telescopic end of the telescoping mechanism End-side teeth is provided in the outer end wall of wheel, one horizontal gear of rotation setting, the horizontal gear outboard end on the tube wall of the lamp stand Protrude from the tube wall certain distance of the lamp stand, inner end engagement one screw rod of connection of the horizontal gear, the end of the screw rod One face gear, the end-side teeth selective connection on the face gear and first bevel gear are set；

Electronic bill-board is set on the lamp stand by annular sleeve, and the annular sleeve is rotatably arranged on described Lamp stand periphery, and ring gear is set on the internal perisporium of at least one annular sleeve, the ring gear and the horizontal gear The engagement of outside protruding end, the deceleration motor integrating drive the electronic bill-board rotation.

Preferably, the lamp stand upper portion side wall, which extends transversely through, opens up an opening, the lamp stand of two sides above and below the opening A first bearing is fixed on side wall respectively, one shaft of rotation setting, the horizontal gear are set in the first bearing of two sides In the shaft, and the horizontal gear is inside and outside the opening.

Preferably, the deceleration motor integrating is mounted on the inner sidewall of the lamp stand by bracket, the deceleration one The output shaft of motor and the opening are in same level, the length of the telescopic direction of the telescoping mechanism and the output shaft It is consistent to spend direction.

Preferably, the screw rod is horizontally installed on the inside of the lamp stand, and the of the screw rod is arranged in the face gear Second end of one end, the screw rod is rotatably arranged on the inner sidewall of the lamp stand by a second bearing；The screw rod It is on same straight line with the output shaft, and face gear interval setting corresponding with first bevel gear.

Preferably, the annular sleeve is openable formula structure, and an annular is opened up on the annular sleeve center inside wall Groove, the annular groove is corresponding with the aperture position, and the ring gear is arranged on the side wall of the annular groove, described Annular groove upper and lower ends protrude one first annular guide rail of setting respectively, described to be open on the lamp stand lateral wall of upper and lower ends A first annular guide groove is offered respectively, and the first annular guide rail is slidably arranged in the first annular guide groove.

Preferably, a servo-actuated axle sleeve is arranged on the lamp stand of the annular sleeve lower end, the servo axis set is up and down It is protruded respectively on the inner sidewall of both ends and one second ring-shaped guide rail is set, between the lamp stand lateral wall of the first annular guide groove lower end It separates and is equipped with two the second annular guide channels, second ring-shaped guide rail is slidably arranged in second annular guide channel.

Preferably, the electronic bill-board is longitudinally disposed, and on the outside of the electronic bill-board upper end and the annular sleeve Wall is fixed, and the electronic bill-board lower end is fixed with the servo-actuated axle sleeve lateral wall.

Preferably, extend a fixing axle, the fixing axle parallel interval setting on the casing of the deceleration motor integrating In the upper end of the output shaft, one second bevel gear, the lower end umbrella tooth of second bevel gear is arranged in the end of the fixing axle It is selectively engaged with the upper end umbrella tooth face of first bevel gear in face.

Preferably, the upper end umbrella flank engagement one third bevel gear of linkage of second bevel gear, the third bevel gear A connecting shaft is arranged in upper surface axis center, and the connecting shaft is drawn upwards from the lamp stand, and the connecting shaft and the lamp Bar upper end is connected by 3rd bearing, and a solar panel, the solar-electricity is arranged in the end of the connecting shaft exit Pond plate is obliquely installed.

Preferably, second bevel gear is located at the axial first end of first bevel gear, and the face gear is located at The axial second end of first bevel gear, the telescoping mechanism drive the first bevel gear axial movement, first umbrella Gear selectivity links with the face gear or the second bevel gear.

The utility model is include at least the following beneficial effects:

1, the steering of the adjustable solar panel of the utility model improves solar panel to track maximum power point Generating efficiency；

2, when occur wind speed it is excessive when, the steering of adjustable electronic bill-board and solar panel is wide by electronics It accuses board and solar panel is adjusted to wind resistance identical as wind direction, on reduction electronic bill-board and solar panel, from And the wind resistance of lamp stand entirety is reduced, avoid the loss that fractures.

The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through Research and practice to the utility model and be understood by the person skilled in the art.

Detailed description of the invention

Fig. 1 is the cross-sectional view of lamp stand side wall at aperture position；

Fig. 2 is the mounting structure schematic diagram of shaft；

Fig. 3 is the mounting structure schematic diagram of deceleration motor integrating；

Fig. 4 is the mounting structure schematic diagram of electronic bill-board；

Fig. 5 is the structural schematic diagram of annular sleeve；

Fig. 6 is the structural schematic diagram of servo-actuated axle sleeve；

Fig. 7 is electronic bill-board position structural schematic diagram adjusted；

Fig. 8 is structural schematic diagram when the first bevel gear is in the second bevel gear and face gear middle position；

Fig. 9 is structural schematic diagram when the first bevel gear is engaged with face gear；

Figure 10 is structural schematic diagram when the first bevel gear is engaged with the second bevel gear.

Specific embodiment

The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation Book text can be implemented accordingly.

It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more The presence or addition of a other elements or combinations thereof.

A kind of safe and reliable city intelligent illuminating street lamp, as Figure 1-10 shows, comprising: lamp stand 100, deceleration motor integrating 400, electronic bill-board 300 and solar panel 540.

Lamp stand 100 is hollow shape structure, and a deceleration motor integrating 400 is laterally arranged in the lamp stand 100, one of slowing down electricity The mounting height of machine 400 is corresponding with the mounting height of electronic bill-board 300, and general electronic bill-board 300 is mounted on lamp stand 100 At the position of middle and upper part.

Specifically, the deceleration motor integrating 400 is mounted on the inner sidewall of the lamp stand 100 by bracket 401, it is described One telescoping mechanism 420, such as telescopic cylinder, hydraulic cylinder, lead screw etc. is set on the output shaft 410 of deceleration motor integrating 400, The uniaxial telescopic cylinder used in the present embodiment.One first bevel gear 430 is set on the telescopic end of the telescoping mechanism 420, the The umbrella cover of one bevel gear 430 is towards 400 side of deceleration motor integrating, while in the end face outside of first bevel gear 430 It is provided with end-side teeth 431.Deceleration motor integrating 400 drives output shaft 410, telescoping mechanism 420 and the first bevel gear 430 same Step rotation, meanwhile, telescoping mechanism 420 drives 430 axial stretching of the first bevel gear.

One horizontal gear 110 of rotation setting on 100 tube wall of the lamp stand at height and position locating for deceleration motor integrating 400, Horizontal gear 110 rotates in the horizontal plane, and 110 outboard end of horizontal gear protrudes from the tube wall certain distance of the lamp stand 100, institute Inner end engagement one screw rod 450 of connection of horizontal gear 110 is stated, a face gear 440 is arranged in the end of the screw rod 450, described 431 selective connection of end-side teeth on face gear 440 and first bevel gear 430.

Open up an opening 150 specifically, extending transversely through in 100 upper portion side wall of lamp stand, be open 150 locating height with The mounting height of deceleration motor integrating 400 is consistent, respectively corresponds on 100 side wall of the lamp stand of about 150 two sides of the opening An installation hole location 150 is offered, installs in hole location 150 and fixes a first bearing 111,111 transfer of the first bearing of two sides One shaft 112 of dynamic setting, so that shaft 112 is longitudinal through opening 150, the horizontal gear 110 is set in the shaft 112 On, so that the rotation of horizontal gear 110 is within openings 150, and the horizontal gear 110 runs through inside and outside the opening 150, that is, Horizontal gear 110 protrudes from inside and outside 100 side wall of lamp stand.

The output shaft 410 of the deceleration motor integrating 400 and the opening 150 are described flexible in same level The telescopic direction of mechanism 420 is consistent with the length direction of the output shaft 410.The screw rod 450 is horizontally installed on the lamp stand The first end of the screw rod 450 is arranged in 100 insides, the face gear 440, and the second end of the screw rod 450 passes through One second bearing 460 is rotatably arranged on the inner sidewall of the lamp stand 100, and screw rod 450 itself is nibbled with 110 inner end of horizontal gear It closes.

The screw rod 450 is on same straight line with the output shaft 410, and the face gear 440 and described first The corresponding interval setting of bevel gear 430, when driving telescoping mechanism 420 drive the first bevel gear 430 to 450 direction of screw rod it is mobile until Face gear 440 engages connection with end-side teeth 431 so that the output shaft 410 of deceleration motor integrating 400 by screw rod 450 with Horizontal gear 110 links, and when control deceleration motor integrating 400 rotates, horizontal gear 110 can be driven to rotate.

In above-mentioned technical proposal, electronic bill-board 300 is set on the lamp stand 100 by annular sleeve 200, the ring Shape axle sleeve 200 is rotatably arranged on 100 periphery of lamp stand, and ring gear 211 is arranged on the internal perisporium of the annular sleeve 200, The ring gear 211 is engaged with the outside protruding end of the horizontal gear 110, to put down when the deceleration motor integrating 400 drives When gear 110 rotates, the electronic bill-board 300 can be driven and rotated around lamp stand 100, adjust windward side, reduce windage, keep away It fractures from power.

Specifically, the annular sleeve 200 is openable formula structure, facilitate the dismounting and maintenance of annular sleeve 200.It is described An annular groove 210, the annular groove 210 and 150 positions pair of the opening are opened up on 200 center inside wall of annular sleeve It answers, the ring gear 211 is arranged on the side wall of the annular groove 210, and 210 upper and lower ends of annular groove are protruded respectively One first annular guide rail 220 is set, it is corresponding, it is opened up respectively on 100 lateral wall of the lamp stand of 150 upper and lower ends of the opening There is a first annular guide groove 120, the first annular guide rail 220 is slidably arranged in the first annular guide groove 120.

When the deceleration motor integrating 400 drives horizontal gear 110 to rotate, since horizontal gear 110 is engaged with ring gear 211 Annular sleeve 200 is driven to rotate around first annular guide groove 120.

In above-mentioned technical proposal, a servo-actuated axle sleeve 600 is arranged on the lamp stand 100 of 200 lower end of annular sleeve, One second ring-shaped guide rail 610, the first annular guide groove is arranged in protrusion respectively on the 600 upper and lower ends inner sidewall of servo-actuated axle sleeve 100 lateral wall of the lamp stand of 120 lower ends, which is spaced apart, is equipped with two the second annular guide channels 130, and second ring-shaped guide rail 610 is sliding It is dynamic to be arranged in second annular guide channel 130.

In above-mentioned technical proposal, the electronic bill-board 300 is longitudinally disposed, and 300 upper end of the electronic bill-board and institute It states 200 lateral wall of annular sleeve to fix, 300 lower end of electronic bill-board is fixed with servo-actuated 600 lateral wall of axle sleeve, works as wind When speed is excessive, 400 annular sleeve 200 of deceleration motor integrating is rotated around first annular guide groove 120, drives entire electronics wide It accuses board 300 to rotate around lamp stand 100, is servo-actuated 600 match follow of axle sleeve and rotates, the direction of final adjustment electronic bill-board 300, with Electronic bill-board 300 is adjusted to Windward angle identical as wind direction, that is, adjusting electronic bill-board 300, itself is reduced Windage avoids stress from fractureing, while reducing the windage on entire lamp stand 100 to minimizing, and improves the reliability of lamp stand 100.

In above-mentioned technical proposal, extend a fixing axle 520, the fixation on the casing of the deceleration motor integrating 400 The upper end of the output shaft 410 is arranged in 520 parallel interval of axis, and one second bevel gear is arranged in the end of the fixing axle 520 510, the umbrella cover of the second bevel gear 510 towards 430 direction of the first bevel gear, the lower end umbrella tooth face of second bevel gear 510 with It selectively engages in the upper end umbrella tooth face of first bevel gear 430.

Specifically, when normal condition, that is, when custom is in normal range (NR), the first bevel gear 430 and the second bevel gear 510 are in meshing state, and due to the effect of screw rod 450, horizontal gear 110 can not be rotated actively, that is to say, that electronic bill-board 300 It is fixed in position state.When wind speed is excessive, telescoping mechanism 420 drives the first bevel gear 430 mobile straight to 450 direction of screw rod Connection is engaged with end-side teeth 431 to face gear 440, so that the output shaft 410 of deceleration motor integrating 400 passes through screw rod 450 It links with horizontal gear 110, when control deceleration motor integrating 400 rotates, horizontal gear 110 can be driven to rotate, and then drive electronics Billboard 300 rotates, and adjusts the direction of electronic bill-board 300, electronic bill-board 300 is adjusted to identical as wind direction, also It is the Windward angle for adjusting electronic bill-board 300, reduces the windage of itself to minimizing, avoid stress from fractureing, reduce simultaneously Windage on entire lamp stand 100, improves the reliability of lamp stand 100.After the rotation of electronic bill-board 300 is adjusted in place, telescopic machine Structure 420 drives the first bevel gear 430 to reset, so that the first bevel gear 430 engages again with the second bevel gear 510.

The upper end umbrella flank engagement one third bevel gear 550 of linkage of second bevel gear 510 described in above-mentioned technology, third umbrella tooth Wheel 550 is horizontally disposed, and 550 upper surface axis center of the third bevel gear is arranged a connecting shaft 530, the connecting shaft 530 from It is drawn upwards in the lamp stand 100, and the connecting shaft 530 is connect with 100 upper end of lamp stand by 3rd bearing 560, from And the axial position of connecting shaft 530 is fixed, it avoids shaking.When deceleration motor integrating 400 drives the first bevel gear 430, the Two bevel gears 510 and third bevel gear 550 rotate, and can drive the rotation of connecting shaft 530 in 3rd bearing 560, and described A solar panel 540 is arranged in the end of 530 exit of connecting shaft, so that solar panel 540 can be driven to rotate, with Light angle variation is chased, the generating efficiency of solar panel is improved.

In the present embodiment, the solar panel 540 is obliquely installed, and keeps it unanimous on the whole with the elevation angle of the sun, just When normal state, solar panel 540 is driven to rotate by deceleration motor integrating 400, to adjust horizontal direction angle, to chase too Sunlight line variation in the horizontal direction, to realize the maximum power generation efficiency of solar panel.

In summary, second bevel gear 510 is located at the axial first end of first bevel gear 430, the end face Gear 440 is located at the axial second end of first bevel gear 430, when normal condition, the second bevel gear 510 and the first bevel gear 430 umbrella cover engages contact, and deceleration motor integrating 400 drives the rotation of solar panel 540 to chase maximum power point, improves The maximum power generation efficiency of solar panel 540.When occur wind speed it is excessive when, fall arm direction similar to adjustment tower crane, realize Wind sheltering tuning in the present embodiment, specifically adjusts the direction of solar panel 540 and electronic bill-board 300, respective to reduce Windage, reduce the probability that solar panel 540, electronic bill-board 300 and lamp stand 100 are broken off.

Solar panel 540, the specific adjustment process in 300 direction of electronic bill-board are as follows:

According to wind direction, deceleration motor integrating 400 drives solar panel 540 to rotate, until solar panel 540 Upper surface is just in face of wind direction, and wind is flowed along 540 upper surface of solar panel, to reduce solar panel 540 On windage.

When solar panel 540 orientation adjustment in place after, the telescoping mechanism 420 drives first bevel gear 430 to 440 direction of face gear move axially, until first bevel gear 430 and the second bevel gear 510 disengaging, and with institute The engagement linkage of face gear 440 is stated, the direction of electronic bill-board 300 is adjusted thereafter through deceleration motor integrating 400, it will be electric Sub- billboard 300 is adjusted to Windward angle identical as wind direction, that is, adjusting electronic bill-board 300, reduces the windage of itself To minimum, stress is avoided to fracture, while reducing the windage on entire lamp stand 100, improves the reliability of lamp stand 100.

From the above mentioned, the steering of the adjustable solar panel 540 of the utility model is mentioned with tracking maximum power point The high generating efficiency of solar panel；Meanwhile when occur wind speed it is excessive when, adjustable electronic bill-board 300 and solar battery The steering of plate 540 adjusts electronic bill-board 300 and solar panel 540 to, reduction electronic bill-board identical as wind direction 300 and solar panel 540 on wind resistance avoid the loss that fractures to reduce the whole wind resistance of lamp stand 100.

It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art, Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality It is not limited to specific details and legend shown and described herein with novel.

Claims (10)

1. a kind of safe and reliable city intelligent illuminating street lamp characterized by comprising

Lamp stand is hollow shape structure, is laterally arranged a deceleration motor integrating in the lamp stand, the deceleration motor integrating it is defeated One telescoping mechanism is set on shaft, one first bevel gear is set on the telescopic end of the telescoping mechanism, first bevel gear End-side teeth is provided in outer end wall, one horizontal gear of rotation setting on the tube wall of the lamp stand, the horizontal gear outboard end protrusion In the tube wall certain distance of the lamp stand, inner end engagement one screw rod of connection of the horizontal gear, the end setting of the screw rod End-side teeth selective connection on one face gear, the face gear and first bevel gear；

Electronic bill-board is set on the lamp stand by annular sleeve, and the annular sleeve is rotatably arranged on the lamp stand Periphery, and ring gear is set on the internal perisporium of at least one annular sleeve, the outside of the ring gear and the horizontal gear Protruding end engagement, the deceleration motor integrating drive the electronic bill-board rotation.

2. a kind of safe and reliable city intelligent illuminating street lamp as described in claim 1, which is characterized in that the lamp stand top Side wall, which extends transversely through, opens up an opening, and the opening fixes a first bearing on the lamp stand side wall of two sides up and down respectively, and two One shaft of rotation setting in the first bearing of side, the horizontal gear is set in the shaft, and the horizontal gear runs through Inside and outside the opening.

3. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 2, which is characterized in that the deceleration one Motor is mounted on the inner sidewall of the lamp stand by bracket, and the output shaft of the deceleration motor integrating and the opening are in same On one horizontal plane, the telescopic direction of the telescoping mechanism is consistent with the length direction of the output shaft.

4. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 3, which is characterized in that the screw rod is lateral It is arranged on the inside of the lamp stand, the first end of the screw rod is arranged in the face gear, and the second end of the screw rod is logical A second bearing is crossed to be rotatably arranged on the inner sidewall of the lamp stand；The screw rod and the output shaft are on same straight line, And face gear interval setting corresponding with first bevel gear.

5. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 4, which is characterized in that the annular sleeve For openable formula structure, an annular groove, the annular groove and the opening are opened up on the annular sleeve center inside wall Position is corresponding, and the ring gear is arranged on the side wall of the annular groove, and the annular groove upper and lower ends are protruded respectively to be set A first annular guide rail is set, offers a first annular guide groove respectively on the lamp stand lateral wall of the opening upper and lower ends, The first annular guide rail is slidably arranged in the first annular guide groove.

6. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 5, which is characterized in that the annular sleeve It is arranged with a servo-actuated axle sleeve on the lamp stand of lower end, protrusion setting 1 the respectively on the servo axis set upper and lower ends inner sidewall Second ring guide rail, the lamp stand lateral wall of the first annular guide groove lower end, which is spaced apart, is equipped with two the second annular guide channels, institute The second ring-shaped guide rail is stated to be slidably arranged in second annular guide channel.

7. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 6, which is characterized in that the e-advertising Board is longitudinally disposed, and the electronic bill-board upper end is fixed with the annular sleeve lateral wall, the electronic bill-board lower end with The servo-actuated axle sleeve lateral wall is fixed.

8. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 4, which is characterized in that the deceleration one Extend a fixing axle on the casing of motor, the upper end of the output shaft, the fixation is arranged in the fixing axle parallel interval One second bevel gear, the lower end umbrella tooth face of second bevel gear and the upper end umbrella tooth of first bevel gear is arranged in the end of axis It selectively engages in face.

9. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 8, which is characterized in that second umbrella tooth A connecting shaft, institute is arranged in the upper end umbrella flank engagement one third bevel gear of linkage of wheel, third bevel gear upper surface axis center It states connecting shaft to draw upwards from the lamp stand, and the connecting shaft is connect with the lamp stand upper end by 3rd bearing, it is described A solar panel is arranged in the end of connecting shaft exit, and the solar panel is obliquely installed.

10. a kind of safe and reliable city intelligent illuminating street lamp as claimed in claim 9, which is characterized in that second umbrella Gear is located at the axial first end of first bevel gear, and the face gear is located at axial the second of first bevel gear End, the telescoping mechanism drive the first bevel gear axial movement, the first bevel gear selectivity and the face gear Or second bevel gear linkage.