CN209283808U - A kind of stratification pericarpium zanthoxyli schinifolii plantation frame - Google Patents

Abstract

The utility model discloses a kind of stratification pericarpium zanthoxyli schinifolii plantation frames, including top plate, the two sides of top plate are symmetrically arranged with bull stick, movable sleeve is equipped with rotary sleeve on bull stick, the bottom of rotary sleeve is fixed with support rod, the outer wall of support rod is equipped with sliding slot, the inside of support rod is coaxially provided with slide bar, sliding sleeve is equipped with multiple sliding sleeves to slide bar in the longitudinal direction, sliding sleeve is connected with U-shaped seat by connecting column, cooperation is equipped with strut in U-shaped seat, planting groove is fixedly installed between two opposite struts, it is mutually flexibly connected between two adjacent planting grooves by folding device, height adjustment device is equipped between two opposite support rods.The utility model stratification pericarpium zanthoxyli schinifolii plantation frame, the spacing height between planting groove is adjustable, and is convenient for carrying.

Description

A kind of stratification pericarpium zanthoxyli schinifolii plantation frame

Technical field

The utility model relates to pericarpium zanthoxyli schinifolii planting technology field, in particular to a kind of stratification pericarpium zanthoxyli schinifolii plantation frame.

Background technique

Pericarpium zanthoxyli schinifolii category shrub, branch taupe have short and small prickle, and there is jig saw at leaflet ellipse or ellipticity lanceolar, edge Tooth, there is gland point between slot, surface green, there is a fine, soft fur, back side paleturquoise, sparsely grow oil drop, and plant makees protection thorn hedge, and fruit can also be adjusted Taste fragrance, pericarp can be used as seasoning, can extract aromatic oil, and can be used as medicine, and seed is edible, and processable production soap, root, Leaf and fruit are used as medicine, and can disappear cold removing toxic substances, food digesting stomach fortifying.

For traditional pericarpium zanthoxyli schinifolii plantation frame in order to save space, plantation frame is generally divided into multilayer, however traditional plantation frame it Between spacing height be usually fixed, and with the continuous growth of pericarpium zanthoxyli schinifolii seedling, original spacing height cannot expire The living space of sufficient pericarpium zanthoxyli schinifolii seedling needs, and the plantation for influencing pericarpium zanthoxyli schinifolii seedling is cultivated, moreover, traditional pericarpium zanthoxyli schinifolii planting equipment It is difficult to carry, has seriously affected the plantation of people in this way and cultivates pericarpium zanthoxyli schinifolii, reduces the production efficiency of people.

Utility model content

To solve problems of the prior art, the spacing height that the utility model provides between a kind of planting groove can The stratification pericarpium zanthoxyli schinifolii plantation frame adjust, being convenient for carrying.

In order to achieve the above purposes, the technical solution adopted by the utility model is:

A kind of stratification pericarpium zanthoxyli schinifolii plantation frame, including top plate, the upper surface of the top plate is fixedly installed with connected unit, described It is fixedly installed with handle at the top of connected unit, bull stick, bull stick and the opposite side are symmetrically arranged on the opposite two sides of top plate Face is vertically arranged, and the bull stick is equipped with fixed block far from one end of top plate, and movable sleeve is equipped with rotary sleeve, the rotary sleeve on bull stick Bottom be fixed with support rod, the support rod is hollow structure, offer sliding slot along its axial direction on the front side outer wall of support rod, The sliding slot runs through the side wall of support rod, and the inside of support rod is coaxially provided with slide bar, slide bar sliding sleeve in the longitudinal direction Equipped with multiple sliding sleeves, the side of the sliding sleeve is fixed with one end of connecting column, and the other end of the connecting column stretches out sliding slot and company It is connected to U-shaped seat in hollow structure, the inner cavity two sides of the U-shaped seat are embedded with sleeve, intert in the sleeve and be equipped with and this The compatible fixed link of sleeve, one end of the fixed link and the outside for being located at U-shaped seat are fixedly installed with support plate, the support Side of the plate far from fixed link is fixedly installed with snap ring equipped with non-slip mat, the other end of fixed link and the inside for being located at U-shaped seat, institute It states snap ring and is fixed with telescopic rod far from the side of fixed link, the telescopic rod is connected with fixed plate far from one end of snap ring, described Side of the fixed plate far from telescopic rod is fixedly connected with the inner wall of U-shaped seat, the surface of the telescopic rod and be located at snap ring and fixation Cooperation is equipped with strut, fixed peace between two opposite struts in setting reset spring, the inner cavity of the U-shaped seat between plate Equipped with planting groove, mutually it is flexibly connected between two adjacent planting grooves by folding device；

Height adjustment device is equipped between two opposite support rods, the height adjustment device includes shaft and motor, The both ends of the shaft pass through bearing respectively and are flexibly connected with two support rods, and the motor is fixed on one of support rod On side wall, the output shaft of motor is coaxially fixed with driving gear, in shaft it is fixed be equipped with engaged with the driving gear from Moving gear, shaft are equipped with pulley far from one end fixation of driven gear, the one of connecting rope are fixed in the race of the pulley End, the other end of connecting rope are fixed with hook, and the hook seat with the hook cooperation is fixed on the planting groove of top layer.

Handle, which is arranged, can be convenient carrying to plantation frame, improve production efficiency, and the two sides of top plate are symmetrically installed with bull stick, Bull stick enables support rod to rotate by rotary sleeve, when in use, support rod can be laterally rotated, beat entire plantation frame It opens, reduces the occupied area of plantation frame when not in use, while can also be by all exposures of multiple planting grooves in plantation frame In the sun, guarantee the illuminating area on planting groove, keep the illumination of each planting groove uniform, the both ends of planting groove are pacified by strut In U-shaped seat, resilient cushion is set in the intracavity bottom of U-shaped seat, resilient cushion has the function of damping, can effectively reduce branch The vibration of bar, improves the stability of planting groove, and the inner cavity two sides of U-shaped seat are inlaid with sleeve, interts in sleeve and is equipped with and sleeve Compatible fixed link, the right end of fixed link connect support plate, and non-slip mat is arranged in support plate, and non-slip mat has anti-skidding work With can prevent from sliding during strut is fixed, further improve the stability of planting groove, the left end of fixed link is by stretching Contracting bar is fixedly connected with the inner wall of U-shaped seat, can effectively be pressed in the surface loop of telescopic rod around reset spring, reset spring is arranged Support plate is made, support plate is enable to suppress strut, effectively raises the stability of plantation frame, is mounted on U in planting groove It when in type seat, can be pressed by the reset spring of setting, support plate and non-slip mat, prevent planting groove from reversion occurs and influences Planting groove after pulling out support rod, can be tuned into level manually or be adjusted according to light conditions and suitable inclined by planting process Light-receiving area is transferred to maximum, improves planting effect by rake angle；When needing to adjust the height between planting groove, pass through unlatching Motor drives driving gear rotation, so that driven gear be driven to rotate, then drives the pulley rotation in shaft, thus will rope Rope is rolled, and rope drives the sliding sleeve at planting groove both ends to move along slide bar by linking up with hook seat, so that planting groove is drawn high, due to It is to be flexibly connected by folding device, therefore when pulling the planting groove of top layer, will drive folding device between planting groove Stretching, extension, so that the spacing height between planting groove is expanded, so that meeting the living space of different times pericarpium zanthoxyli schinifolii seedling needs It wants, improves its growth efficiency.

Preferably, the support rod is equipped with fixing seat far from the side of U-shaped seat, is hinged with connecting rod in the fixing seat, Two connecting rods positioned at top plate the same side are flexibly connected by the first movable axis.Connecting rod and fixing seat are set, it can be to branch Strut plays the role of fixed support, effectively raises the stability of plantation frame, prevents collapsing for plantation frame.

Preferably, the folding device include first fold unit and second fold unit, it is described first fold unit and Second folds between unit through the flexible connection of the second movable axis, the first folding one end and upper one of unit far from the second movable axis Layer planting groove connection, the second folding one end of unit far from the second movable axis are connect with next layer of planting groove.

Preferably, spring is arranged on the slide bar, the both ends of the spring are solid with the opposite side of adjacent two sliding sleeve respectively Fixed connection.Spring is set between two sliding sleeves, the effect of buffering and damping can be played, improves the stability of plantation frame.

Preferably, the bottom end of the support rod is equipped with pulley assembly, and the pulley assembly includes attachment base, rotation axis and two A buffer spring, the attachment base are fixedly connected with the bottom end of support rod, and the lower end of attachment base is fixedly connected with fixed plate, described The lower surface of fixed plate is symmetrical arranged there are two the first positioning column and two side plates, and two side plates are located at two first positioning Between column, through limiting slot is equipped on side plate, the rotation axis passes through two limiting slots and is equipped with installation at rotation axis both ends Seat, rotation axis are equipped with idler wheel, and the idler wheel is arranged between both side plate, and the upper surface of the mounting base is provided with determines with first Corresponding second positioning column of position column, the both ends of the buffer spring are socketed in respectively on the first positioning column and the second positioning column.

Pulley assembly is set in the bottom end of support rod, can be convenient the movement of entire support frame, and set in pulley assembly Buffer spring is set, damping, buffering can be played the role of, the stability of plantation frame entirety is improved, makes the planting process of pericarpium zanthoxyli schinifolii more Increase effect.

The beneficial effects of the utility model are:

1, setting handle can be convenient the carrying to plantation frame, improve production efficiency, and the two sides of top plate, which are symmetrically installed with, to be turned Bar, bull stick enable support rod to rotate by rotary sleeve, when in use, support rod can be laterally rotated, and make entirely to plant Frame is opened, and reduces the occupied area of plantation frame when not in use, while can also be whole by multiple planting grooves in plantation frame Exposure in the sun, guarantees the illuminating area on planting groove, keeps the illumination of each planting groove uniform.

2, it when planting groove is mounted in U-shaped seat, can be pressed by the reset spring of setting, support plate and non-slip mat System prevents planting groove from reversion occurs and influences planting process, and improving plantation frame stability can be manual after pulling out support rod Planting groove is tuned into level or adjusts suitable tilt angle according to light conditions, light-receiving area is transferred to maximum, improves kind Plant effect.

3, when needing to adjust the height between planting groove, by opening motor, driving gear rotation is driven, to drive Driven gear rotates, and then drives the pulley rotation in shaft, so that rope be rolled, rope passes through hook and the drive kind of hook seat The sliding sleeve for planting slot both ends is moved along slide bar, to planting groove be drawn high, due to being to be connected between planting groove by folding device activity It connects, therefore when pulling the planting groove of top layer, will drive folding device stretching, extension, to expand the spacing between planting groove Highly, to meet the living space needs of different times pericarpium zanthoxyli schinifolii seedling, its growth efficiency is improved.

4, connecting rod and fixing seat are set, fixed support can be played the role of to support rod, effectively raise plantation The stability of frame prevents collapsing for plantation frame.

5, spring is set between two sliding sleeves, the effect of buffering and damping can be played, improve the stability of plantation frame.

6, pulley assembly is set in the bottom end of support rod, can be convenient the movement of entire support frame, and in pulley assembly Buffer spring is set, damping, buffering can be played the role of, improves the stability of plantation frame entirety, makes the planting process of pericarpium zanthoxyli schinifolii More efficiently.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of stratification pericarpium zanthoxyli schinifolii plantation frame described in the utility model embodiment；

Fig. 2 is the side view of stratification pericarpium zanthoxyli schinifolii plantation frame described in the utility model embodiment；

Fig. 3 is the cross-sectional view of U-shaped seat described in the utility model embodiment；

Fig. 4 is the cross-sectional view of support rod described in the utility model embodiment；

Fig. 5 is the left view of Fig. 4；

Fig. 6 is the structural schematic diagram of folding device described in the utility model embodiment；

Fig. 7 is the cross-sectional view at the part Fig. 1 " A ".

Appended drawing reference:

1, top plate；2, connected unit；3, handle；4, bull stick；5, fixed block；6, rotary sleeve；7, support rod；8, sliding slot；9, sliding Bar；10, sliding sleeve；11, connecting column；12, U-shaped seat；13, sleeve；14, fixed link；15, support plate；16, non-slip mat；17, snap ring； 18, telescopic rod；19, mounting plate；20, reset spring；21, resilient cushion；22, strut；23, planting groove；24, folding device；25, turn Axis；26, motor；27, driving gear；28, driven gear；29, pulley；30, connecting rope；31, fixing seat；32, connecting rod；33, First movable axis；34, first unit is folded；35, second unit is folded；36, the second movable axis；37, spring；38, attachment base； 39, fixed plate；40, the first positioning column；41, side plate；42, limiting slot；43, rotation axis；44, mounting base；45, idler wheel；46, second Positioning column；47, buffer spring.

Specific embodiment

The embodiments of the present invention are described in detail with reference to the accompanying drawing.

Embodiment 1

As Figure 1-Figure 5, the upper surface of a kind of stratification pericarpium zanthoxyli schinifolii plantation frame, including top plate 1, the top plate 1 is fixed Connected unit 2 is installed, the top of the connected unit 2 is fixedly installed with handle 3, is symmetrical arranged on the opposite two sides of top plate 1 There is bull stick 4, bull stick 4 is vertically arranged with the opposite flank, and the bull stick 4 is equipped with fixed block 5 far from one end of top plate 1, on bull stick 4 Movable sleeve is equipped with rotary sleeve 6, and the bottom of the rotary sleeve 6 is fixed with support rod 7, and the support rod 7 is hollow structure, support rod Sliding slot 8 is offered along its axial direction on 7 front side outer wall, the sliding slot 8 runs through the side wall of support rod 7, and the inside of support rod 7 is coaxial Equipped with slide bar 9, sliding sleeve is equipped with multiple sliding sleeves 10 to the slide bar 9 in the longitudinal direction, and the side of the sliding sleeve 10 is fixed with company One end of column 11 is connect, the other end of the connecting column 11 stretches out sliding slot 8 and is connected with U-shaped seat 12 in hollow structure, described U-shaped The inner cavity two sides of seat 12 are embedded with sleeve 13, intert in the sleeve 13 and are equipped with fixed link 14 compatible with the sleeve 13, One end of the fixed link 14 and the outside for being located at U-shaped seat 12 are fixedly installed with support plate 15, and the support plate 15 is far from fixed The side of bar 14 is fixedly installed with snap ring 17, institute equipped with non-slip mat 16, the other end of fixed link 14 and the inside for being located at U-shaped seat 12 It states snap ring 17 and is fixed with telescopic rod 18 far from the side of fixed link 14, the telescopic rod 18 is connected with peace far from one end of snap ring 17 Loading board 19, side of the mounting plate 19 far from telescopic rod 18 are fixedly connected with the inner wall of U-shaped seat 12, the table of the telescopic rod 18 Face and between snap ring 17 and mounting plate 19 around setting reset spring 20, cooperation is equipped with branch in the inner cavity of the U-shaped seat 12 Bar 22, is fixedly installed with planting groove 23 between two opposite struts 22, by folding dress between two adjacent planting grooves 23 24 are set mutually to be flexibly connected；

Height adjustment device is equipped between two opposite support rods 7, the height adjustment device includes shaft 25 and electricity Machine 26, the both ends of the shaft 25 pass through bearing respectively and are flexibly connected with two support rods 7, and the motor 26 is fixed on wherein one On the side wall of a support rod 7, the output shaft of motor 26 is coaxially fixed with driving gear 27, in shaft 25 it is fixed be equipped with it is described The driven gear 28 that driving gear 27 engages, shaft 25 are equipped with pulley 29, the cunning far from one end fixation of driven gear 28 One end of connecting rope 30 is fixed in the race of wheel 29, the other end of connecting rope 30 is fixed with hook, positioned at the plantation of top layer The hook seat with the hook cooperation is fixed on slot 23.

Handle 3, which is arranged, can be convenient carrying to plantation frame, improve production efficiency, and the two sides of top plate 1, which are symmetrically installed with, to be turned Bar 4, bull stick 4 enable support rod 7 to rotate, when in use, support rod 7 can be laterally rotated by rotary sleeve 6, make entire Plantation frame is opened, and reduces the occupied area of plantation frame when not in use, while can also be by multiple planting grooves in plantation frame 23 all expose in the sun, guarantee the illuminating area on planting groove 23, keep the illumination of each planting groove 23 uniform, planting groove 23 Both ends be mounted in U-shaped seat 12 by strut 22, resilient cushion 21 is set in the intracavity bottom of U-shaped seat 12, resilient cushion 21 has The effect of damping can effectively reduce the vibration of strut 22, improve the stability of planting groove 23, the inner cavity two of U-shaped seat 12 Side is inlaid with sleeve 13, interts in sleeve 13 and is equipped with fixed link 14 compatible with sleeve 13, and the right end of fixed link 14 connects branch Fagging 15, is arranged non-slip mat 16 in support plate 15, and non-slip mat 16 has the function of anti-skidding, can prevent the process of the fixation of strut 22 Middle sliding, further improves the stability of planting groove 23, and the left end of fixed link 14 passes through the inner wall of telescopic rod 18 and U-shaped seat 12 It is fixedly connected, can effectively suppress support plate around reset spring 20, reset spring 20 is arranged in the surface loop of telescopic rod 18 15, so that support plate 15 is suppressed strut 22, effectively raise the stability of plantation frame, is mounted in planting groove 23 U-shaped When in seat 12, it can be pressed by the reset spring 20 of setting, support plate 15 and non-slip mat 16, prevent planting groove 23 from occurring instead Then planting process is influenced, after support rod 7 is pulled out, planting groove 23 can be tuned into level manually or be adjusted according to light conditions Light-receiving area is transferred to maximum, improves planting effect by the suitable tilt angle of section；When needing to adjust the height between planting groove 23 When, by opening motor 26, drives driving gear 27 to rotate, so that driven gear 28 be driven to rotate, then drive in shaft 25 Pulley 29 rotate, so that rope be rolled, rope drives the sliding sleeve 10 at 23 both ends of planting groove along slide bar 9 by hook and hook seat It is mobile, so that planting groove 23 be drawn high, due to being flexibly connected by folding device 24 between planting groove 23, pulling When the planting groove 23 of top layer, the stretching, extension of folding device 24 will drive, so that the spacing height between planting groove 23 is expanded, thus The living space needs for meeting different times pericarpium zanthoxyli schinifolii seedling, improve its growth efficiency.

Embodiment 2

As shown in Fig. 2, the present embodiment is on the basis of embodiment 1, the support rod 7 is equipped with far from the side of U-shaped seat 12 Fixing seat 31 is hinged with connecting rod 32 in the fixing seat 31, and two connecting rods 32 positioned at 1 the same side of top plate are living by first Moving axis 33 is flexibly connected.Connecting rod 32 and fixing seat 31 are set, fixed support can be played the role of to support rod 7, effectively The stability for improving plantation frame prevents collapsing for plantation frame.

Embodiment 3

As shown in fig. 6, the present embodiment is on the basis of embodiment 1, the folding device 24 includes the first folding unit 34 Unit 35 is folded with second, the first folding unit 34 and second fold movable even by the second movable axis 36 between unit 35 It connects, the first folding one end of unit 34 far from the second movable axis 36 is connect with upper one layer of planting groove 23, and second folds unit 35 far One end from the second movable axis 36 is connect with next layer of planting groove 23.

Embodiment 4

As shown in figure 4, the present embodiment is on the basis of embodiment 1, spring 37, the spring are arranged on the slide bar 9 37 both ends are fixedly connected with the opposite side of adjacent two sliding sleeve 10 respectively.Spring 37, Ke Yiqi is set between two sliding sleeves 10 To the effect of buffering and damping, the stability of plantation frame is improved.

Embodiment 5

As shown in fig. 7, the present embodiment is on the basis of embodiment 1, the bottom end of the support rod 7 is equipped with 29 component of pulley, 29 component of pulley includes attachment base 38, rotation axis 43 and two buffer springs 47, the bottom of the attachment base 38 and support rod 7 End is fixedly connected, and the lower end of attachment base 38 is fixedly connected with fixed plate 39, and the lower surface of the fixed plate 39 is symmetrically arranged with two A first positioning column 40 and two side plates 41, two side plates 41 are located between two the first positioning columns 40, pass through on side plate 41 It is equipped with limiting slot 42, the rotation axis 43 passes through two limiting slots 42 and is equipped with mounting base 44 at 43 both ends of rotation axis, turns Moving axis 43 is equipped with idler wheel 45, and the idler wheel 45 is arranged between both side plate 41, the upper surface of the mounting base 44 be provided with Corresponding second positioning column 46 of first positioning column 40, the both ends of the buffer spring 47 are socketed in 40 He of the first positioning column respectively On second positioning column 46.

29 component of pulley is set in the bottom end of support rod 7, can be convenient the movement of entire support frame, and 29 component of pulley Middle setting buffer spring 47 can play the role of damping, buffering, improve the stability of plantation frame entirety, make the plantation of pericarpium zanthoxyli schinifolii Process is more efficient.

Specific embodiment of the present utility model above described embodiment only expresses, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the protection scope of the utility model.

Claims (5)

1. a kind of stratification pericarpium zanthoxyli schinifolii plantation frame, which is characterized in that including top plate, the upper surface of the top plate is fixedly installed with company It is consecutive, it is fixedly installed with handle at the top of the connected unit, is symmetrically arranged with bull stick on the opposite two sides of top plate, described turn Bar is equipped with fixed block far from one end of top plate, and movable sleeve is equipped with rotary sleeve on bull stick, and the bottom of the rotary sleeve is fixed with support Bar, the support rod are hollow structure, offer sliding slot along its axial direction on the front side outer wall of support rod, the sliding slot is through support The side wall of bar, the inside of support rod are coaxially provided with slide bar, and sliding sleeve is equipped with multiple sliding sleeves to the slide bar in the longitudinal direction, described The side of sliding sleeve is fixed with one end of connecting column, and the other end of the connecting column stretches out sliding slot and is connected with U in hollow structure Type seat, the inner cavity two sides of the U-shaped seat are embedded with sleeve, intert in the sleeve and be equipped with fixation compatible with the sleeve Bar, one end of the fixed link and the outside for being located at U-shaped seat are fixedly installed with support plate, the support plate far from fixed link one Side is fixedly installed with snap ring equipped with non-slip mat, the other end of fixed link and the inside for being located at U-shaped seat, and the snap ring is far from fixed link Side be fixed with telescopic rod, the telescopic rod is connected with fixed plate far from one end of snap ring, and the fixed plate is far from telescopic rod Side be fixedly connected with the inner wall of U-shaped seat, the surface of the telescopic rod and multiple around setting between snap ring and fixed plate Position spring, cooperation is equipped with strut in the inner cavity of the U-shaped seat, is fixedly installed with planting groove between two opposite struts, adjacent Two planting grooves between be mutually flexibly connected by folding device；

Height adjustment device is equipped between two opposite support rods, the height adjustment device includes shaft and motor, described The both ends of shaft pass through bearing respectively and are flexibly connected with two support rods, and the motor is fixed on the side wall of one of support rod On, the output shaft of motor is coaxially fixed with driving gear, and fixation is equipped with the driven tooth engaged with the driving gear in shaft Wheel, shaft are equipped with pulley far from one end fixation of driven gear, one end of connecting rope are fixed in the race of the pulley, even The other end of splicing is fixed with hook, and the hook seat with the hook cooperation is fixed on the planting groove of top layer.

2. stratification pericarpium zanthoxyli schinifolii plantation frame according to claim 1, which is characterized in that the support rod far from U-shaped seat one Side is equipped with fixing seat, is hinged with connecting rod in the fixing seat, and two connecting rods positioned at top plate the same side pass through the first activity Axis is flexibly connected.

3. stratification pericarpium zanthoxyli schinifolii plantation frame according to claim 1, which is characterized in that the folding device includes the first folding Unit and second folds unit, and described first, which folds unit and second, folds between unit through the flexible connection of the second movable axis.

4. stratification pericarpium zanthoxyli schinifolii plantation frame according to claim 1, which is characterized in that be arranged with spring, institute on the slide bar The both ends for stating spring are fixedly connected with the opposite side of adjacent two sliding sleeve respectively.

5. stratification pericarpium zanthoxyli schinifolii plantation frame according to claim 1, which is characterized in that the bottom end of the support rod is equipped with pulley Component, the pulley assembly include attachment base, rotation axis and two buffer springs, and the bottom end of the attachment base and support rod is fixed Connection, the lower end of attachment base are fixedly connected with fixed plate, and the lower surface of the fixed plate is arranged symmetrically, and there are two the first positioning columns With two side plates, two side plates are located between two the first positioning columns, through equipped with limiting slot, the rotation axis on side plate It is equipped with mounting base across two limiting slots and at rotation axis both ends, rotation axis is equipped with idler wheel, and the idler wheel is arranged in two sides Between plate, the upper surface of the mounting base is provided with the second positioning column corresponding with the first positioning column, the buffer spring Both ends are socketed in respectively on the first positioning column and the second positioning column.