CN213124617U

CN213124617U - Lithium cell prevents falling device

Info

Publication number: CN213124617U
Application number: CN202021719116.8U
Authority: CN
Inventors: 林华梅; 常仕林
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-05-04
Anticipated expiration: 2030-08-18

Abstract

The utility model relates to a lithium cell technical field just discloses a lithium cell prevents falling device, which comprises a housin, the first fixture block of interior bottom fixedly connected with of casing, be provided with the lithium cell on the first fixture block, set up the first recess with lithium cell looks adaptation on the first fixture block, the top swing joint of lithium cell has the second fixture block, the upside of second fixture block is provided with first damping spring, be provided with first flexible post between first damping spring and the second fixture block. This device is prevented falling by lithium cell through the fixture block and the semicircle fixture block that set up, can fix a position the lithium cell and stabilize, through connection scute and damping spring that set up, has reached all-round shock attenuation effect.

Description

Lithium cell prevents falling device

Technical Field

The utility model relates to a lithium cell technical field specifically is a lithium cell prevents falling device.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream nowadays. Lithium batteries can be broadly classified into two types: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was born in 1996, and the safety, specific capacity, self-discharge rate and cost performance of rechargeable batteries were all superior to those of lithium ion batteries. At present, the device is prevented falling by some lithium cells can not be spacing to the lithium cell.

Chinese authorized utility model publication (announcement) no: the lithium battery anti-falling device disclosed in CN208208838U can protect the lithium battery from rubber when the lithium battery falls down through a rubber sleeve; but in the use, it can not carry out spacing fixed, the low shortcoming of safeguard measure suitability to the lithium cell.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a device is prevented falling by lithium cell has solved the current lithium cell that proposes in the above-mentioned background and has prevented falling the device in the use, and it can not carry out spacing fixed, the problem that safeguard measure is inefficiency to the lithium cell.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a lithium battery anti-falling device comprises a shell, wherein a first clamping block is fixedly connected to the inner bottom of the shell, a lithium battery is arranged on the first clamping block, a first groove matched with the lithium battery is formed in the first clamping block, a second clamping block is movably connected to the top of the lithium battery, a first damping spring is arranged on the upper side of the second clamping block, and a first telescopic column is arranged between the first damping spring and the second clamping block;

a first supporting block is arranged on one side of the lithium battery, a first semicircular fixture block is arranged between the first supporting block and the lithium battery, a second damping spring is arranged on one side, far away from the first semicircular fixture block, of the first supporting block, and a first telescopic block is arranged between the second damping spring and the first supporting block;

a second supporting block is arranged on one side, away from the first supporting block, of the lithium battery, a second semicircular clamping block is arranged between the second supporting block and the lithium battery, a third damping spring is arranged on one side, away from the second semicircular clamping block, of the second supporting block, and a second telescopic block is arranged between the third damping spring and the second supporting block;

the top of the shell is fixedly connected with two first groove blocks which are arranged at equal intervals, a first fixing plate is arranged on the upper side of each first groove block, and two fourth damping springs which are arranged at equal intervals are arranged between each first groove block and the corresponding first fixing plate;

the bottom of the shell is fixedly connected with two second groove blocks which are arranged equidistantly, a second fixing plate is arranged on the lower side of each second groove block, and only two fifth damping springs which are arranged equidistantly are arranged between each second fixing plate and the corresponding second groove block;

two third groove blocks which are arranged at equal intervals are fixedly connected to one side wall of the shell, a third fixing plate is arranged on one side, away from the shell, of each third groove block, and two sixth damping springs which are arranged at equal intervals are arranged between each third groove block and each third fixing plate;

two fourth groove blocks which are arranged equidistantly are fixedly connected to one side wall of the shell, which is far away from the third fixing plate, a fourth fixing plate is arranged on one side of the fourth groove block, which is far away from the shell, and two seventh damping springs which are arranged equidistantly are arranged between the fourth fixing plate and the fourth groove block;

the damping connecting angle plate is characterized in that a first damping connecting angle plate is arranged between the first fixing plate and the third fixing plate, a second damping connecting angle plate is arranged between the third fixing plate and the second fixing plate, a third damping connecting angle plate is arranged between the second fixing plate and the fourth fixing plate, and a fourth damping connecting angle plate is arranged between the fourth fixing plate and the first fixing plate.

Further, the bottom of lithium cell can be dismantled with the first recess of first fixture block and be connected, the bottom of first flexible post runs through the top of second fixture block and extends to the inside of second fixture block, the one end of first damping spring and the top fixed connection of first flexible post, the other end of first damping spring and the interior roof fixed connection of casing.

Further, one side of first semicircle fixture block can be dismantled with a lateral surface side of lithium cell and be connected, one side of first supporting block and the opposite side fixed connection of first semicircle fixture block, one side of first flexible piece runs through a lateral wall of first supporting block and extends to the inside of first supporting block, the one end and the first flexible piece opposite side fixed connection of second damping spring, the other end of second damping spring and one side inner wall fixed connection of casing.

Furthermore, one side of the second semicircular fixture block is detachably connected with the other outer side face of the lithium battery, the other side of the second semicircular fixture block is fixedly connected with one side of the second supporting block, one side of the second telescopic block penetrates through one side wall of the second supporting block and extends into the second supporting block, one end of the third damping spring is fixedly connected with the other side of the second telescopic block, the other end of the third damping spring is fixedly connected with the inner wall of one side of the shell, the first semicircular fixture block and the second semicircular fixture block are centrally symmetrical by taking the lithium battery as a center, and the first fixture block and the second fixture block are centrally symmetrical by taking the lithium battery as a center.

Furthermore, an interval is reserved between the two first groove blocks, one end of a fourth damping spring is fixedly connected with the inner bottom wall of each first groove block, the other end of the fourth damping spring is fixedly connected with the bottom of the first fixing plate, and buffering cushions are arranged on the first fixing plate, the second fixing plate, the third fixing plate, the fourth fixing plate, the first shock absorption connection angle plate, the second shock absorption connection angle plate, the third shock absorption connection angle plate and the fourth shock absorption connection angle plate.

Furthermore, a gap is reserved between the two second groove blocks, a gap is reserved between the two fifth damping springs, one end of each fifth damping spring is fixedly connected with the inner bottom wall of each second groove block, and the other end of each fifth damping spring is fixedly connected with the top of the second fixing plate.

Furthermore, a gap is reserved between the two third groove blocks, a gap is reserved between the two sixth damping springs, one end of each sixth damping spring is fixedly connected with one side of the third fixing plate, and the other end of each sixth damping spring is fixedly connected with the inside of the third groove block.

Furthermore, a gap is reserved between the two fourth groove blocks, a gap is reserved between the two seventh damping springs, one end of each seventh damping spring is fixedly connected with one side of the fourth fixing plate, and the other end of each seventh damping spring is fixedly connected with the inner wall of the fourth groove block.

Furthermore, one end of the first shock-absorbing connection angle plate is fixedly connected with one side of the first fixing plate, the other end of the first shock-absorbing connection angle plate is fixedly connected with one side of the third fixing plate, one end of the second shock-absorbing connection angle plate is fixedly connected with the other side of the third fixing plate, the other end of the second shock-absorbing connection angle plate is fixedly connected with one side of the second fixing plate, one end of the third shock-absorbing connection angle plate is fixedly connected with the other side of the second fixing plate, the other end of the third shock-absorbing connection angle plate is fixedly connected with one side of the fourth fixing plate, one end of the fourth shock-absorbing connection angle plate is fixedly connected with one side wall of the first fixing plate, and the other end of the fourth shock-absorbing connection angle plate is fixedly connected with one side wall of the fourth fixing.

(III) advantageous effects

The utility model provides a lithium cell prevents falling device possesses following beneficial effect:

this device is prevented falling by lithium cell through the fixture block and the semicircle fixture block that set up, can fix a position the lithium cell and stabilize, through connection scute and damping spring that set up, has reached all-round shock attenuation effect.

Drawings

Fig. 1 is a schematic structural view of the lithium battery anti-falling device of the present invention;

fig. 2 is a schematic structural view of a section of the lithium battery anti-falling device of the present invention;

fig. 3 is a schematic structural diagram of a second fixture block of the lithium battery anti-falling device of the present invention;

fig. 4 is a schematic structural diagram of a first fixture block of the lithium battery anti-falling device of the present invention;

fig. 5 is a schematic structural diagram of a first semicircular fixture block of the lithium battery anti-falling device of the present invention;

fig. 6 is the utility model discloses the second semi-circular fixture block's of device is prevented falling by lithium cell schematic diagram.

In the figure: the damping device comprises a shell 1, a lithium battery 2, a first clamping block 3, a second clamping block 4, a first telescopic column 5, a first damping spring 6, a first groove 7, a first semicircular clamping block 8, a second semicircular clamping block 9, a first supporting block 10, a second supporting block 11, a second damping spring 12, a third damping spring 13, a first telescopic block 14, a second telescopic block 15, a first fixing plate 16, a first groove block 17, a fourth damping spring 18, a second fixing plate 19, a second groove block 20, a fifth damping spring 21, a third fixing plate 22, a third groove block 23, a sixth damping spring 24, a fourth fixing plate 25, a fourth groove block 26, a seventh damping spring 27, a first shock-absorbing connection angle plate 28, a second shock-absorbing connection angle plate 29, a third shock-absorbing connection angle plate 30, a fourth shock-absorbing connection angle plate 31 and a buffer cushion 32.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-6, the present invention provides a technical solution:

a lithium battery anti-falling device comprises a shell 1, wherein a first clamping block 3 is fixedly connected to the inner bottom of the shell 1, a lithium battery 2 is arranged on the first clamping block 3, a first groove 7 matched with the lithium battery 2 is formed in the first clamping block 3, a second clamping block 4 is movably connected to the top of the lithium battery 2, a first damping spring 6 is arranged on the upper side of the second clamping block 4, a first telescopic column 5 is arranged between the first damping spring 6 and the second clamping block 4, a first supporting block 10 is arranged on one side of the lithium battery 2, a first semicircular clamping block 8 is arranged between the first supporting block 10 and the lithium battery 2, a second damping spring 12 is arranged on one side of the first supporting block 10 far away from the first semicircular clamping block 8, a first telescopic block 14 is arranged between the second damping spring 12 and the first supporting block 10, a second supporting block 11 is arranged on one side of the lithium battery 2 far away from the first supporting block 10, and a second semicircular clamping block 9 is arranged between the second supporting block 11 and the lithium battery, a third damping spring 13 is arranged on one side of the second supporting block 11 far away from the second semicircular clamping block 9, a second telescopic block 15 is arranged between the third damping spring 13 and the second supporting block 11, two first groove blocks 17 which are arranged equidistantly are fixedly connected to the top of the shell 1, a first fixing plate 16 is arranged on the upper side of each first groove block 17, two fourth damping springs 18 which are arranged equidistantly are arranged between each first groove block 17 and the corresponding first fixing plate 16, two second groove blocks 20 which are arranged equidistantly are fixedly connected to the bottom of the shell 1, a second fixing plate 19 is arranged on the lower side of each second groove block 20, only two fifth damping springs 21 which are arranged equidistantly are arranged between each second fixing plate 19 and each second groove block 20, two third groove blocks 23 which are arranged equidistantly are fixedly linked to one side wall of the shell 1, and a third fixing plate 22 is arranged on one side of each third groove block 23 far away from the shell 1, two sixth damping springs 24 are arranged at equal intervals between the third groove block 23 and the third fixing plate 22, two fourth groove blocks 26 are arranged at equal intervals and fixedly connected to a side wall of the housing 1 away from the third fixing plate 22, a fourth fixing plate 25 is arranged at a side of the fourth groove block 26 away from the housing 1, two seventh damping springs 27 are arranged at equal intervals between the fourth fixing plate 25 and the fourth groove blocks 26, a first shock-absorbing connection angle plate 28 is arranged between the first fixing plate 16 and the third fixing plate 22, a second shock-absorbing connection angle plate 29 is arranged between the third fixing plate 22 and the second fixing plate 19, a third shock-absorbing connection angle plate 30 is arranged between the second fixing plate 19 and the fourth fixing plate 25, a fourth shock-absorbing connection angle plate 31 is arranged between the fourth fixing plate 25 and the first fixing plate 16, and the bottom of the lithium battery 2 is detachably connected with the first groove 7 of the first fixture block 3, the bottom of the first telescopic column 5 penetrates through the top of the second clamping block 4 and extends into the second clamping block 4, one end of a first damping spring 6 is fixedly connected with the top of the first telescopic column 5, the other end of the first damping spring 6 is fixedly connected with the inner top wall of the shell 1, one side of the first semicircular clamping block 8 is detachably connected with one outer side surface side of the lithium battery 2, one side of a first supporting block 10 is fixedly connected with the other side of the first semicircular clamping block 8, one side of a first telescopic block 14 penetrates through one side wall of the first supporting block 10 and extends into the first supporting block 10, one end of a second damping spring 12 is fixedly connected with the other side of the first telescopic block 14, the other end of the second damping spring 12 is fixedly connected with the inner wall of one side of the shell 1, one side of the second semicircular clamping block 9 is detachably connected with the other outer side surface of the lithium battery 2, the other side of the second semicircular clamping block 9 is fixedly connected with one side of the second supporting block 11, one side of the second telescopic block 15 extends to the inside of the second supporting block 11 through one side wall of the second supporting block 11, one end of a third damping spring 13 is fixedly connected with the other side of the second telescopic block 15, the other end of the third damping spring 13 is fixedly connected with one side inner wall of the shell 1, the first semicircular fixture block 8 and the second semicircular fixture block 9 are centrosymmetric by taking the lithium battery 2 as a center, the first fixture block 3 and the second fixture block 4 are centrosymmetric by taking the lithium battery 2 as a center, a space is left between the two first groove blocks 17, one end of a fourth damping spring 18 is fixedly connected with the inner bottom wall of the first groove block 17, the other end of the fourth damping spring 18 is fixedly connected with the bottom of the first fixing plate 16, the second fixing plate 19, the third fixing plate 22, the fourth fixing plate 25, the first shock-absorbing connection angle plate 28, the second shock-absorbing connection angle plate 29, the third shock-absorbing connection angle plate 30 and the fourth shock-absorbing connection angle plate 31 are all provided with, a space is reserved between the two second groove blocks 20, a space is reserved between the two fifth damping springs 21, one end of each fifth damping spring 21 is fixedly connected with the inner bottom wall of each second groove block 20, the other end of each fifth damping spring 21 is fixedly connected with the top of the second fixing plate 19, a space is reserved between the two third groove blocks 23, a space is reserved between the two sixth damping springs 24, one end of each sixth damping spring 24 is fixedly connected with one side of the third fixing plate 22, the other end of each sixth damping spring 24 is fixedly connected with the inside of the third groove block 23, a space is reserved between the two fourth groove blocks 26, a space is reserved between the two seventh damping springs 27, one end of each seventh damping spring 27 is fixedly connected with one side of the fourth fixing plate 25, the other end of each seventh damping spring 27 is fixedly connected with the inner wall of the fourth groove block 26, one end of the first shock-absorbing connection angle plate 28 is fixedly connected with one side of the first fixing plate 16, the other end of the first shock-absorbing connection angle plate 28 is fixedly connected with one side of the third fixing plate 22, one end of the second shock-absorbing connection angle plate 29 is fixedly connected with the other side of the third fixing plate 22, the other end of the second shock-absorbing connection angle plate 29 is fixedly connected with one side of the second fixing plate 19, one end of the third shock-absorbing connection angle plate 30 is fixedly connected with the other side of the second fixing plate 19, the other end of the third shock-absorbing connection angle plate 30 is fixedly connected with one side of the fourth fixing plate 25, one end of the fourth shock-absorbing connection angle plate 31 is fixedly connected with one side wall of the first fixing plate 16, and the other end of the fourth shock-absorbing connection angle plate 31 is fixedly connected with one side wall of the.

Theory of operation, this lithium cell prevents falling the device, during the use, places lithium cell 2 in first recess 7 of first fixture block 3, then fixes a position from top to bottom through second fixture block 4, makes semi-circular fixture block control the location to lithium cell 2.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; or indirectly through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a lithium cell prevents falling device, includes casing (1), its characterized in that: a first clamping block (3) is fixedly connected to the inner bottom of the shell (1), a lithium battery (2) is arranged on the first clamping block (3), a first groove (7) matched with the lithium battery (2) is formed in the first clamping block (3), a second clamping block (4) is movably connected to the top of the lithium battery (2), a first damping spring (6) is arranged on the upper side of the second clamping block (4), and a first telescopic column (5) is arranged between the first damping spring (6) and the second clamping block (4);

a first supporting block (10) is arranged on one side of the lithium battery (2), a first semicircular clamping block (8) is arranged between the first supporting block (10) and the lithium battery (2), a second damping spring (12) is arranged on one side, far away from the first semicircular clamping block (8), of the first supporting block (10), and a first telescopic block (14) is arranged between the second damping spring (12) and the first supporting block (10);

a second supporting block (11) is arranged on one side, away from the first supporting block (10), of the lithium battery (2), a second semicircular clamping block (9) is arranged between the second supporting block (11) and the lithium battery (2), a third damping spring (13) is arranged on one side, away from the second semicircular clamping block (9), of the second supporting block (11), and a second telescopic block (15) is arranged between the third damping spring (13) and the second supporting block (11);

the top of the shell (1) is fixedly connected with two first groove blocks (17) which are arranged at equal intervals, a first fixing plate (16) is arranged on the upper side of each first groove block (17), and two fourth damping springs (18) which are arranged at equal intervals are arranged between each first groove block (17) and the corresponding first fixing plate (16);

the bottom of the shell (1) is fixedly connected with two second groove blocks (20) which are arranged at equal intervals, a second fixing plate (19) is arranged on the lower side of each second groove block (20), and only two fifth damping springs (21) which are arranged at equal intervals are arranged between each second fixing plate (19) and each second groove block (20);

two third groove blocks (23) which are arranged at equal intervals are fixedly connected to one side wall of the shell (1), a third fixing plate (22) is arranged on one side, away from the shell (1), of the third groove blocks (23), and two sixth damping springs (24) which are arranged at equal intervals are arranged between the third groove blocks (23) and the third fixing plate (22);

one side wall of the shell (1) far away from the third fixing plate (22) is fixedly connected with two fourth groove blocks (26) which are arranged at equal intervals, one side of the fourth groove block (26) far away from the shell (1) is provided with a fourth fixing plate (25), and two seventh damping springs (27) which are arranged at equal intervals are arranged between the fourth fixing plate (25) and the fourth groove block (26);

a first shock absorption connection angle plate (28) is arranged between the first fixing plate (16) and the third fixing plate (22), a second shock absorption connection angle plate (29) is arranged between the third fixing plate (22) and the second fixing plate (19), a third shock absorption connection angle plate (30) is arranged between the second fixing plate (19) and the fourth fixing plate (25), and a fourth shock absorption connection angle plate (31) is arranged between the fourth fixing plate (25) and the first fixing plate (16).

2. The lithium battery anti-falling device according to claim 1, wherein the bottom of the lithium battery (2) is detachably connected with the first groove (7) of the first clamping block (3), the bottom of the first telescopic column (5) extends to the inside of the second clamping block (4) through the top of the second clamping block (4), one end of the first damping spring (6) is fixedly connected with the top of the first telescopic column (5), and the other end of the first damping spring (6) is fixedly connected with the inner top wall of the shell (1).

3. The lithium battery anti-falling device according to claim 1, wherein one side of the first semicircular fixture block (8) is detachably connected with one outer side surface side of the lithium battery (2), one side of the first support block (10) is fixedly connected with the other side of the first semicircular fixture block (8), one side of the first telescopic block (14) penetrates through one side wall of the first support block (10) and extends to the inside of the first support block (10), one end of the second damping spring (12) is fixedly connected with the other side of the first telescopic block (14), and the other end of the second damping spring (12) is fixedly connected with the inner wall of one side of the shell (1).

4. The lithium battery crash-proof device as claimed in claim 1, wherein one side of the second semicircular fixture block (9) is detachably connected with the other outer side surface of the lithium battery (2), the other side of the second semicircular fixture block (9) is fixedly connected with one side of a second supporting block (11), one side of the second telescopic block (15) penetrates through one side wall of the second supporting block (11) and extends to the inside of the second supporting block (11), one end of the third damping spring (13) is fixedly connected with the other side of the second telescopic block (15), the other end of the third damping spring (13) is fixedly connected with the inner wall of one side of the shell (1), the first semicircular clamping block (8) and the second semicircular clamping block (9) are symmetrical by taking the lithium battery (2) as a center, the first fixture block (3) and the second fixture block (4) are symmetrical by taking the lithium battery (2) as a center.

5. The lithium battery anti-falling device according to claim 1, wherein a space is left between the two first groove blocks (17), one end of the fourth damping spring (18) is fixedly connected with the inner bottom wall of the first groove block (17), the other end of the fourth damping spring (18) is fixedly connected with the bottom of the first fixing plate (16), and the first fixing plate (16), the second fixing plate (19), the third fixing plate (22), the fourth fixing plate (25), the first shock absorption connection angle plate (28), the second shock absorption connection angle plate (29), the third shock absorption connection angle plate (30) and the fourth shock absorption connection angle plate (31) are all provided with a buffer pad (32).

6. The lithium battery anti-falling device according to claim 1, wherein a space is reserved between the two second groove blocks (20), a space is reserved between the two fifth damping springs (21), one end of each fifth damping spring (21) is fixedly connected with the inner bottom wall of each second groove block (20), and the other end of each fifth damping spring (21) is fixedly connected with the top of the second fixing plate (19).

7. The lithium battery anti-falling device according to claim 1, wherein a space is reserved between the two third groove blocks (23), a space is reserved between the two sixth damping springs (24), one end of each sixth damping spring (24) is fixedly connected with one side of a third fixing plate (22), and the other end of each sixth damping spring (24) is fixedly connected with the inside of each third groove block (23).

8. The lithium battery anti-falling device according to claim 1, wherein a gap is reserved between the two fourth groove blocks (26), a gap is reserved between the two seventh damping springs (27), one end of each seventh damping spring (27) is fixedly connected with one side of the fourth fixing plate (25), and the other end of each seventh damping spring (27) is fixedly connected with the inner wall of each fourth groove block (26).

9. The lithium battery crash-proof device as claimed in claim 1, wherein one end of the first shock-absorbing connection angle plate (28) is fixedly connected with one side of the first fixing plate (16), the other end of the first shock-absorbing connection angle plate (28) is fixedly connected with one side of the third fixing plate (22), one end of the second shock-absorbing connection angle plate (29) is fixedly connected with the other side of the third fixing plate (22), the other end of the second shock-absorbing connection angle plate (29) is fixedly connected with one side of the second fixing plate (19), one end of the third shock-absorbing connection angle plate (30) is fixedly connected with the other side of the second fixing plate (19), the other end of the third shock-absorbing connection angle plate (30) is fixedly connected with one side of the fourth fixing plate (25), and one end of the fourth shock-absorbing connection angle plate (31) is fixedly connected with one side wall of the first fixing plate (16), the other end of the fourth shock absorption connecting angle plate (31) is fixedly connected with one side wall of the fourth fixing plate (25).