CN209529260U - A kind of novel intelligent spinal surgery osteoclast - Google Patents

Abstract

The utility model discloses a kind of novel intelligent spinal surgery osteoclasts, including osteoclast main body and pedestal, the top of osteoclast main body is equipped with feed well, the fixed connection upper housing in feed well lower end, upper housing outer wall installs control panel, broken bone component one is arranged in the inner cavity upper end of upper housing, the lower section setting baffle one and baffle two of broken bone component one, baffle one is fixedly connected with crash panel with baffle two, broken bone component two is fixedly connected with below baffle two, upper housing is fixedly connected with lower case, and the lower end surface of lower case is fixedly connected with pedestal.Broken bone component one is arranged in the utility model, the bone cutter being staggered installation of cuts big bone block small, facilitates subsequent broken bone, is engaged using helical gear three with the helical gear two in left side, the helical gear two on right side is engaged with helical gear one, motor two drives rotary shaft one to rotate, then by centrifugal action, enhances broken bone effect, bone block is set and hits salient point collision, percussion is generated, broken bone efficiency is accelerated, design is reasonable.

Description

A kind of novel intelligent spinal surgery osteoclast

Technical field

The utility model relates to medical osteoclast technical field, the broken bone of specifically a kind of novel intelligent spinal surgery Device.

Background technique

Need to use broken bone in surgical operation, traditional broken bone production, which is generally stung using osteophore, cuts, and when operating cost is taken Power, and the effect of broken bone is bad.

Chinese Patent Application No.: 201711000278.9, Authorization Notice No.: 107716034 A of CN provides a kind of intelligence Can change spinal surgery osteoclast, including shell, the shell it is opening up, and the left and right sides of enclosure interior upper end is symmetrical It is fixed with left side roller and right roller, the side of left side roller is equidistantly fixed with the first broken blade, the side of right roller Face is equidistantly fixed with the second broken blade, and the first broken blade and the second broken blade are staggered, two before and after left side roller The shaft at end passes through fixing bearing with the shaft of right roller rear and front end respectively and connects with the inner wall of shell, and PLC controller is logical It crosses infrared sensor and detects that the limbs of user are extend into through-hole, PLC controller control decelerating motor stops working, and improves The safety of the intelligence spinal surgery osteoclast, two brush bone brush brushes are failed broken bone between a broken blade and second broken Broken bone between broken blade mitigates the workload of medical staff, and it is convenient that box collects broken bone, improves the work of medical staff Make efficiency, but there are still the following shortcomings: broken bone mode is single, and broken bone low efficiency, equipment cooling, damping property are poor.

Summary of the invention

1, it to solve the problems, such as

Single, broken bone low efficiency, equipment cooling, damping for the broken bone mode of existing intelligent spinal surgery osteoclast Property difference problem, the purpose of this utility model is to provide a kind of novel intelligent spinal surgery osteoclasts, above-mentioned to solve The problem of being proposed in background technique.

2, technical solution

To achieve the above object, the utility model provides the following technical solutions:

A kind of novel intelligent spinal surgery osteoclast, including osteoclast main body and pedestal, the osteoclast main body Top is equipped with feed well, and the fixed connection upper housing in the feed well lower end, the outer wall of the upper housing installs control panel, described Broken bone component one is arranged in the inner cavity upper end of upper housing, and baffle one, one lower section of baffle is arranged in the lower section of the broken bone component one Baffle two is set, and the baffle one is fixedly connected with crash panel with baffle two, is used for prolongation bone block fall time, avoids bone block It falls and concentrates, influence broken bone effect, broken bone component two is fixedly connected with below the baffle two, the upper housing is fixedly connected with lower casing The lower end surface of body, the lower case is fixedly connected with pedestal.

As a further solution of the present invention: the upper housing is hollow structure, and inner cavity is equipped with cooling water, described Water outlet is connected on the left of upper housing, connects water inlet on the right side of the upper housing, by inlet and outlet external water pipe, is realized The cooling water of upper casing intracoelomic cavity recycles, and cools down to equipment, extends the service life of equipment.

The upper housing surface of internal cavity is fixedly connected with crash panel as a further solution of the present invention, described to hit It hits on plate and is uniformly arranged shock salient point, bone block and shock salient point collision, generate percussion during broken bone, accelerate broken bone effect Rate.

As a further solution of the present invention, the broken bone component one include drive roll, driven voller, bone cutter, Driving shaft, driven shaft, motor one, fixed plate, gear one, gear two, bearing one and sealing bearing one, the drive roll and driven Bone cutter is fixedly mounted on roller, driving shaft is fixedly mounted in the drive roll, and driven shaft, the master is fixedly mounted in the driven voller Moving axis and driven shaft one end are rotatablely connected on the inside of the inner cavity of upper housing by bearing one, and the driving shaft and the driven shaft other end are logical It crosses sealing bearing and always puts on shell, the active shaft rear end is fixedly connected with the output end of motor one, the fixed peace of the motor one In fixed plate, the fixed plate is fixedly connected with upper housing, and gear one, the gear two are fixedly mounted on the driving shaft It is engaged with gear one, and is fixedly connected with driven shaft, big bone block is put into feed well when broken bone, bone block is in feed well slide-in Shell, motor one works, and since gear one is engaged with gear two, drive roll and the rotation of driven voller opposite direction, what is be staggered installation of is cut Osteotome cuts big bone block small, facilitates subsequent broken bone, improves broken bone efficiency and effect.

The broken bone component two includes rotary shaft one, broken osteotome group, rotation as a further solution of the present invention, Axis two, swingle, broken osteotome piece, sealing bearing two, helical gear one, bearing two, bearing three, interconnecting piece and power part, the rotation One upper end of shaft is rotatablely connected baffle two by bearing two, and one upper section of rotary shaft is fixedly connected with broken osteotome group, the rotation One lower section of axis is fixedly connected with swingle, and the broken osteotome piece is symmetricly set on the both ends of swingle, and passes through bearing three and rotation Bar rotation connection, the inner cavity of the upper housing are fixedly connected with tilt clapboard, and the sealing bearing two runs through tilt clapboard and lower casing Body, the rotary shaft one is rotatablely connected tilt clapboard and lower case by sealing bearing two, and is fixedly connected with helical gear one, described Interconnecting piece includes bearing block, bearing four, rotary shaft four and helical gear two, and the bearing block is fixedly mounted on the bottom end of lower case Face, the rotary shaft four are rotatablely connected bearing block by bearing four, and four both ends of rotary shaft symmetrically connect helical gear two, right side Helical gear two engaged with helical gear one, the power part include helical gear three, rotary shaft three, sealing bearing three, two and of motor Guard box, the helical gear three are engaged with the helical gear two in left side, and the helical gear three is fixedly connected with rotary shaft three, the rotation Axis threeway crosses sealing bearing three through lower case, and is fixedly connected with the output end of motor two, and the motor two is fixedly mounted on down The upper surface of shell, and outer cup connects guard box, bone block is cut small rear whereabouts, and motor two operates, due to helical gear three and left side Helical gear two engage, the helical gear two on right side engages with helical gear one, and drive one high speed rotation of rotary shaft, broken osteotome group is to bone Block carry out fragmentation processing, and rotary shaft four with rotary shaft one rotate when, swingle is also with rotation, so that broken osteotome piece is not only As rotary shaft one rotates, also with swingle rotation, to generate powerful centrifugal action, bone block is by further fragmentation.

As a further solution of the present invention, in the lower case be arranged opening, the opening corresponding tilt every Reclaiming chamber is arranged in the right side of plate, the lower housing cavity, and the reclaiming chamber makes to be connected to by being open with upper housing, the reclaiming chamber Inside be slidably connected collection frame, and broken bone slides into reclaiming chamber along hang plate, and pulling out collection frame can be taken off broken bone, easy to operate.

The pedestal includes support rod, support slot and dampening assembly as a further solution of the present invention, described Post upper is fixedly connected with lower case, and the support rod lower end is slidably connected support slot, the dampening assembly include upper spring, Lower spring, lower supporting plate, upper backup pad and mobile bar, the support rod is hollow structure, and lower end is open, in the support rod Be slidably connected upper backup pad, and the upper backup pad upper end is fixedly connected with upper spring, and the upper spring other end is fixedly connected with branch The top of fagging inner cavity, the upper backup pad lower end are fixedly connected with mobile bar, and the mobile bar other end is fixedly connected with lower support Plate, the lower supporting plate are slidably connected support slot, and the lower supporting plate lower end is fixedly connected with lower spring, the lower spring other end It is fixedly connected with support slot, during broken bone, due to two continuous running of motor one and motor, so that equipment shakes, support rod hair Raw upper and lower displacement, lower telescopic spring drive mobile bar mobile, and upper spring is flexible, and will limit the movement of support rod, to reduce Displacement, damping vibration protect equipment.

3, beneficial effect

Compared with prior art, the utility model has the beneficial effects that

(1) the utility model is arranged broken bone component one, and the bone cutter being staggered installation of cuts big bone block small, facilitates subsequent broken Bone improves broken bone efficiency and effect.

(2) the utility model is engaged using helical gear three with the helical gear two in left side, the helical gear two and helical gear on right side One engagement, motor two drive rotary shaft one to rotate, then by centrifugal action, enhance broken bone effect.

(3) the utility model setting bone block and shock salient point collision, generate percussion, accelerate broken bone efficiency.

(4) the utility model realizes the cooling water circulation of upper casing intracoelomic cavity by inlet and outlet external water pipe, right Equipment cools down, and extends the service life of equipment.

(5) the utility model reduces displacement using dampening assembly, and damping vibration protects equipment.

(6) control panel is arranged in the utility model, easy to operate.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of novel intelligent spinal surgery osteoclast.

Fig. 2 is a kind of structural schematic diagram of broken bone component one in novel intelligent spinal surgery osteoclast.

Fig. 3 is a kind of structural schematic diagram of pedestal in novel intelligent spinal surgery osteoclast.

In figure: 1- osteoclast main body；2- pedestal；3- hopper；4- upper housing；5- water outlet；6- water inlet；7- crash panel； 8- hits salient point；The broken bone component one of 9-；10- drive roll；11- driven voller；12- bone cutter；13- driving shaft；14- driven shaft；15- Motor one；16- fixed plate；17- gear one；18- gear two；19- baffle one；20- baffle two；21- rotary shaft one；The broken bone of 22- Knife group；23- rotary shaft two；The broken osteotome piece of 24-；25- seals bearing two；26- helical gear one；27- bearing block；28- rotary shaft four； 29- helical gear two；30- helical gear three；31- motor two；32- swingle；33- lower case；34- support slot；35- upper spring； Spring under 36-；37- lower supporting plate；38- upper backup pad；39- mobile bar；40- collection frame；42- support rod.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Please refer to Fig. 1~3, in the utility model embodiment, a kind of novel intelligent spinal surgery osteoclast, including it is broken Bone object main body 1 and pedestal 2, the top of the osteoclast main body 1 are equipped with feed well 3, the fixed connection upper casing in 3 lower end of feed well Body 4, the upper housing 4 is hollow structure, and inner cavity is equipped with cooling water, connects water outlet 5 on the left of the upper housing 4, it is described on Connect water inlet 6 on the right side of shell 4, control panel be fixedly mounted on the right side of the upper housing 4, by water inlet 6 and water outlet 5 outside Water receiving pipe realizes the cooling water circulation of 4 inner cavity of upper housing, cools down to equipment, extend the service life of equipment, the upper casing 4 surface of internal cavity of body is fixedly connected with crash panel 7, be uniformly arranged on the crash panel 7 hit salient point 8, during broken bone bone block with It hitting salient point 8 to collide, generates percussion and accelerate broken bone efficiency, broken bone component 1 is arranged in the inner cavity upper end of the upper housing 4, The broken bone component 1 includes drive roll 10, driven voller 11, bone cutter 12, driving shaft 13, driven shaft 14, motor 1, fixes Plate 16, gear 1, gear 2 18, bearing one and sealing bearing one, are fixedly mounted on the drive roll 10 and driven voller 11 Driving shaft 13 is fixedly mounted in bone cutter 12, the drive roll 10, and driven shaft 14, the driving shaft is fixedly mounted in the driven voller 11 13 and 14 one end of driven shaft be rotatablely connected by bearing one on the inside of the inner cavity of upper housing 4, the driving shaft 13 and driven shaft 14 are another Shell 4 is always put on by sealing bearing in one end, and 13 rear end of driving shaft is fixedly connected with the output end of motor 1, the electricity Machine 1 is electrical connected with control panel, and the motor 1 is fixedly mounted in fixed plate 16, the fixed plate 16 and upper casing Body 4 is fixedly connected, and gear 1 is fixedly mounted on the driving shaft 13, and the gear 2 18 is engaged with gear 1, and fixed Driven shaft 14 is connected, big bone block is put into feed well 3 when broken bone, bone block slides into upper housing 4, motor 1 along feed well 3 Work, since gear 1 is engaged with gear 2 18, drive roll 10 and the rotation of 11 opposite direction of driven voller, the bone cutter being staggered installation of 12 cut big bone block small, facilitate broken bone, baffle 1, one 19 lower section of baffle is arranged in the lower section of the broken bone component 1 Baffle 2 20 is set, the baffle 1 is fixedly connected with crash panel 7 with baffle 2 20, it is used for prolongation bone block fall time, It avoids bone block from falling to concentrate, influences broken bone effect, broken bone component two is arranged in 2 20 lower section of baffle, and the broken bone component two wraps Include rotary shaft 1, broken osteotome group 22, rotary shaft 2 23, swingle 32, broken osteotome piece 24, sealing bearing 2 25, helical gear one 26, bearing two, bearing three, interconnecting piece and power part, one 21 upper end of rotary shaft are rotatablely connected baffle 2 20 by bearing two, One 21 upper section of rotary shaft is fixedly connected with broken osteotome group 22, and one 21 lower section of rotary shaft is fixedly connected with swingle 32, described Broken osteotome piece 24 is symmetricly set on the both ends of swingle 32, and is rotatablely connected by bearing three and swingle 32, the upper housing 4 Inner cavity be fixedly connected with tilt clapboard, the upper housing 4 is fixedly connected with lower case 33, the sealing bearing 2 25 through inclination every Plate and lower case 33, the rotary shaft 1 are rotatablely connected tilt clapboard and lower case 33 by sealing bearing 2 25, and fixed Helical gear 1 is connected, the interconnecting piece includes bearing block 27, bearing four, rotary shaft 4 28 and helical gear 2 29, the bearing Seat 27 is fixedly mounted on the bottom face of lower case 33, and the rotary shaft 4 28 is rotatablely connected bearing block 27 by bearing four, described 4 28 both ends of rotary shaft symmetrically connect helical gear 2 29, and the helical gear 2 29 on right side is engaged with helical gear 1, the power part It is oblique with left side including helical gear 3 30, rotary shaft three, sealing bearing three, motor 2 31 and guard box, the helical gear 3 30 Gear 2 29 engages, and the helical gear 3 30 is fixedly connected with rotary shaft three, and the rotary shaft threeway is crossed under sealing bearing three runs through Shell 33, and it is fixedly connected with the output end of motor 2 31, the motor 2 31 is electrical connected with control panel, the motor 2 31 It being fixedly mounted on the upper surface of lower case 33, and outer cup connects guard box, bone block is cut small rear whereabouts, and motor 2 31 operates, by Helical gear 2 29 in helical gear 3 30 with left side engages, and the helical gear 2 29 on right side is engaged with helical gear 1, drives rotation One 21 high speed rotation of axis, broken osteotome group 22 carries out fragmentation processing to bone block, and rotary shaft 2 23 is rotated with rotary shaft 1 When, swingle 32 is also with rotation so that broken osteotome piece 24 is not only as rotary shaft 1 rotates, also with swingle 32 from Turn, to generate powerful centrifugal action, opening, the opening pair is arranged in the lower case 33 by further fragmentation in bone block The right side of tilt clapboard is answered, reclaiming chamber is arranged in 33 inner cavity of lower case, and the reclaiming chamber makes to connect by opening and upper housing 4 Logical, the collection frame that is slidably connected in the reclaiming chamber 40, broken bone slides into reclaiming chamber along hang plate, and it is i.e. desirable to pull out collection frame 40 Broken bone out, easy to operate, the pedestal 2 includes support rod 42, support slot 34 and dampening assembly, and 42 upper end of support rod is fixed Lower case 33 is connected, 42 lower end of support rod is slidably connected support slot 34, and the dampening assembly includes upper spring 35, lower spring 36, lower supporting plate 37, upper backup pad 38 and mobile bar 39, the support rod 42 is hollow structure, and lower end is open, the support Be slidably connected upper backup pad 38 in bar 42, and 38 upper end of upper backup pad is fixedly connected with upper spring 35, and the upper spring 35 is another End is fixedly connected with the top of 38 inner cavity of upper backup pad, and 38 lower end of upper backup pad is fixedly connected with mobile bar 39, the mobile bar 39 other ends are fixedly connected with lower supporting plate 37, and the lower supporting plate 37 is slidably connected support slot 34,37 lower end of lower supporting plate It is fixedly connected with lower spring 36, lower 36 other end of spring is fixedly connected with support slot 34, during broken bone, due to motor 1 With 2 31 continuous running of motor, so that equipment shakes, upper and lower displacement occurs for support rod 42, and lower spring 36 is flexible, drives mobile bar 39 is mobile, and upper spring 35 is flexible, and will limit the movement of support rod 42, to reduce displacement, damping vibration protects equipment.

The working principle of the utility model is: big bone block is put into feed well 3 when broken bone, bone block is sliding along feed well 3 Enter upper housing 4, motor 1 works, and since gear 1 is engaged with gear 2 18, drive roll 10 and 11 opposite direction of driven voller turn Dynamic, the bone cutter 12 being staggered installation of cuts big bone block small, facilitates bone block fragmentation, bone block cut it is small after fall, motor 2 31 Operating, since helical gear 3 30 is engaged with the helical gear 2 29 in left side, the helical gear 2 29 on right side is engaged with helical gear 1, band Dynamic one 21 high speed rotation of rotary shaft, broken osteotome group 22 carries out fragmentation processing to bone block, and rotary shaft 2 23 is with rotary shaft 1 When rotation, swingle 32 is also with rotation, so that broken osteotome piece 24 is not only as rotary shaft 1 rotates, also with swingle 32 Rotation, to generate powerful centrifugal action, bone block is by further fragmentation, and bone block and shock salient point 8 collide in this process, It generates percussion and accelerates broken bone efficiency, by 5 external water pipe of water inlet 6 and water outlet, realize the cooling of 4 inner cavity of upper housing Water circulation, cools down to equipment, extends the service life of equipment, simultaneously because equipment shakes, upper bottom occurs for support rod 42 It moves, lower spring 36 is flexible, drives mobile bar 39 mobile, upper spring 35 is flexible, and will limit the movement of support rod 42, to reduce Displacement, damping vibration protect equipment, and last broken bone slides into reclaiming chamber along hang plate, and pulling out collection frame 40 can be taken off broken bone, It is easy to operate.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (7)

1. a kind of novel intelligent spinal surgery osteoclast, including osteoclast main body (1) and pedestal (2), which is characterized in that institute The top for stating osteoclast main body (1) is equipped with feed well (3), fixed connection upper housing (4) in feed well (3) lower end, it is described on Shell (4) outer wall installs control panel, and broken bone component one (9), the broken bone component is arranged in the inner cavity upper end of the upper housing (4) Lower section setting baffle one (19) of one (9) and baffle two (20), the baffle one (19) are fixedly connected with shock with baffle two (20) Plate (7), baffle two (20) lower section are fixedly connected with broken bone component two, and the upper housing (4) is fixedly connected with lower case (33), institute The lower end surface for stating lower case (33) is fixedly connected with pedestal (2).

2. a kind of novel intelligent spinal surgery osteoclast according to claim 1, which is characterized in that the upper housing It (4) is hollow structure, and inner cavity is equipped with cooling water, connects water outlet (5) on the left of the upper housing (4), the upper housing (4) is right Side connects water inlet (6).

3. a kind of novel intelligent spinal surgery osteoclast according to claim 1, which is characterized in that the upper housing (4) surface of internal cavity is fixedly connected crash panel (7), is uniformly arranged on the crash panel (7) and is hit salient point (8).

4. a kind of novel intelligent spinal surgery osteoclast according to claim 1, which is characterized in that the broken bone group Part one (9) include drive roll (10), driven voller (11), bone cutter (12), driving shaft (13), driven shaft (14), motor one (15), Fixed plate (16), gear one (17), gear two (18), bearing one and sealing bearing one, the drive roll (10) and driven voller (11) it is fixedly mounted on bone cutter (12), driving shaft (13) are fixedly mounted in the drive roll (10), and the driven voller (11) is solid Dingan County fills driven shaft (14), and the driving shaft (13) and driven shaft (14) one end pass through the rotation connection of bearing one upper housing (4) On the inside of inner cavity, the driving shaft (13) and driven shaft (14) other end pass through sealing bearing and always put on shell (4), the active Axis (13) rear end is fixedly connected with the output end of motor one (15), and the motor one (15) is fixedly mounted on fixed plate (16), institute It states fixed plate (16) to be fixedly connected with upper housing (4), gear one (17) is fixedly mounted on the driving shaft (13), the gear two (18) it is engaged with gear one (17), and is fixedly connected with driven shaft (14).

5. a kind of novel intelligent spinal surgery osteoclast according to claim 1, which is characterized in that the broken bone group Part two includes rotary shaft one (21), broken osteotome group (22), rotary shaft two (23), swingle (32), broken osteotome piece (24), sealing axis Two (25), helical gear one (26), bearing two, bearing three, interconnecting piece and power part are held, rotary shaft one (21) upper end passes through axis Two rotation connection baffles two (20) are held, rotary shaft one (21) upper section is fixedly connected with broken osteotome group (22), the rotary shaft one (21) lower section is fixedly connected swingle (32), and the broken osteotome piece (24) is symmetricly set on the both ends of swingle (32), and passes through Bearing three and swingle (32) are rotatablely connected, and the inner cavity of the upper housing (4) is fixedly connected with tilt clapboard, the sealing bearing two (25) run through tilt clapboard and lower case (33), the rotary shaft one (21) by sealing bearing two (25) rotation connection inclination every Plate and lower case (33), and it is fixedly connected with helical gear one (26), the interconnecting piece includes bearing block (27), bearing four, rotary shaft Four (28) and helical gear two (29), the bearing block (27) are fixedly mounted on the bottom face of lower case (33), the rotary shaft four (28) bearing block (27) are rotatablely connected by bearing four, rotary shaft four (28) both ends symmetrically connect helical gear two (29), right The helical gear two (29) of side is engaged with helical gear one (26), and the power part includes helical gear three (30), rotary shaft three, sealing axis Three, motor two (31) and guard box are held, the helical gear three (30) is engaged with the helical gear two (29) in left side, the helical gear three (30) it is fixedly connected with rotary shaft three, the rotary shaft threeway crosses sealing bearing three through lower case (33), and is fixedly connected with motor The output end of two (31), the motor two (31) is fixedly mounted on the upper surface of lower case (33), and outer cup connects guard box.

6. a kind of novel intelligent spinal surgery osteoclast according to claim 1, which is characterized in that the lower case (33) it is arranged on and is open, the right side of the opening corresponding tilt partition, lower case (33) the inner cavity setting reclaiming chamber, described time Receiving chamber makes to be connected to by being open with upper housing (4), the collection frame that is slidably connected in the reclaiming chamber (40).

7. a kind of novel intelligent spinal surgery osteoclast according to claim 1, which is characterized in that the pedestal It (2) include support rod (42), support slot (34) and dampening assembly, support rod (42) upper end is fixedly connected with lower case (33), Support rod (42) lower end is slidably connected support slot (34), the dampening assembly include upper spring (35), lower spring (36), under Support plate (37), upper backup pad (38) and mobile bar (39), the support rod (42) is hollow structure, and lower end is open, described It is slidably connected upper backup pad (38) in support rod (42), upper backup pad (38) upper end is fixedly connected upper spring (35), described Upper spring (35) other end is fixedly connected with the top of upper backup pad (38) inner cavity, and upper backup pad (38) lower end is fixedly connected with shifting Lever (39), mobile bar (39) other end are fixedly connected lower supporting plate (37), and the lower supporting plate (37) is slidably connected branch It supports slot (34), lower supporting plate (37) lower end is fixedly connected lower spring (36), and lower spring (36) other end is fixedly connected Support slot (34).