Brake assembly split charging tray

Abstract

The utility model discloses a brake assembly split charging tray, which relates to the technical field of automobile general assembly manufacturing and comprises an upper-layer mounting mechanism, and four groups of brake assemblies are distributed and mounted on the upper-layer mounting mechanism for assembling; the rotating mechanism is mounted below the upper-layer mounting mechanism; the lower-layer mounting mechanism is positioned below the rotating mechanism and is fixedly connected with the rotating mechanism; the split charging tray is provided with four split charging sets which correspond to the left front portion, the right front portion, the left rear portion and the right rear portion respectively and are in bilateral symmetry, the upper layer installation mechanism, the rotating mechanism and the lower layer installation mechanism are integrated into a whole, synchronous split charging of four brake assemblies on one trolley can be completed rapidly and safely, and the split charging efficiency of the brake assemblies is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the automobile general assembly manufacturing technical field especially relates to brake assembly subassembly tray. BACKGROUND

[0002] Brake is the device that has the function such as making moving part (or moving machinery) deceleration, stop or keep stop state, is the mechanical part of making the moving piece in machinery stop or deceleration, commonly known as brake, brake;Brake is mainly composed of brake frame, brake piece and operating device etc.;Some brakes are also equipped with automatic adjusting device of brake piece gap, in order to reduce brake torque and structural size, brake is usually installed on the high-speed shaft of equipment, but the large-scale equipment (such as mine hoist, elevator etc.) with higher safety requirement should be installed on the low-speed shaft close to the working part of equipment.

[0003] The existing brake assembly of car type is total assembly for delivery, without special subassembly tray, after the gradual rise of new car type, brake assembly part is updated to single piece for delivery, to meet the production demand, it is urgent to design a tray that can simultaneously assemble four brake assemblies of whole car. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of brake assembly subassembly trays, which can quickly, safely complete four brake assemblies of a car synchronous subassembly, improve brake assembly subassembly efficiency, with optimized structure.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] Brake assembly subassembly tray, comprising:

[0007] Upper installation mechanism, the upper installation mechanism is installed four brake assemblies to assemble with distribution;

[0008] Rotary mechanism, the rotary mechanism is installed below the upper installation mechanism and drives the upper installation mechanism to rotate;

[0009] Lower installation mechanism, the lower installation mechanism is located below the rotary mechanism and is connected with the rotary mechanism fixed.

[0010] Further, the upper installation mechanism includes:

[0011] Tray upper bottom plate;

[0012] First positioning assembly, multiple first positioning assemblies are installed at the four corners of the upper end surface of tray upper bottom plate;

[0013] Supporting assembly, multiple supporting assemblies are installed at the side of first positioning assembly;

[0014] The fixed pressing disc assembly is arranged on the bottom plate of the tray and corresponds to the position of the supporting assembly.

[0015] Further, the first positioning assembly has a positioning pin;

[0016] The bottom of the positioning pin is fixedly connected with a positioning seat;

[0017] The positioning seat is fixed on the bottom plate of the tray by bolts.

[0018] Further, the supporting assembly has a cylindrical supporting body;

[0019] The bottom of the cylindrical supporting body is fixedly connected with a first mounting base;

[0020] The first polyurethane block is arranged above the cylindrical supporting body;

[0021] The first mounting base and the first polyurethane block are fixed on the bottom plate of the tray and the cylindrical supporting body by bolts, respectively.

[0022] Further, the fixed pressing disc assembly comprises:

[0023] The supporting leg is fixedly connected with a second mounting base at the bottom;

[0024] The second mounting base is fixed on the bottom plate of the tray by bolts.

[0025] Further, the rotating mechanism comprises:

[0026] The slewing bearing assembly is fixedly connected on the bottom plate of the tray;

[0027] The universal ball assembly is fixedly arranged at the bottom on the lower mounting mechanism;

[0028] The slewing bearing assembly is partially connected with the universal ball assembly in a sliding manner;

[0029] The second positioning assembly is fixedly connected on the lower mounting mechanism;

[0030] The handle assembly is arranged on one side of the slewing bearing assembly and one end of the handle assembly is fixedly arranged on the lower mounting mechanism.

[0031] Further, the slewing bearing assembly comprises:

[0032] The slewing bearing forms an upper connecting plate and a lower connecting plate;

[0033] The slewing bearing forms an upper connecting plate and a lower connecting plate;

[0034] The bearing upper connecting plate is fixedly connected to the tray upper bottom plate by bolts;

[0035] Positioning clamping plates are distributed around the bearing upper connecting plate and are fixedly connected to the tray upper bottom plate by bolts;

[0036] Tray rotary support plates are distributed around the positioning clamping plates and are fixedly connected to the tray upper bottom plate by bolts.

[0037] Further, the universal ball assembly comprises:

[0038] A universal ball body and a ball seat;

[0039] A plurality of universal ball bodies are arranged to rotate along the ball seat and drive the tray rotary support plates to rotate synchronously;

[0040] The ball seat is fixedly installed on the lower layer mounting mechanism.

[0041] Further, the second positioning assembly comprises:

[0042] A positioning clamping wheel structure;

[0043] The positioning clamping wheel structure is located between the positioning clamping plates and the tray rotary support plates.

[0044] Further, the lower layer mounting mechanism comprises:

[0045] A tray lower bottom plate is fixedly connected to the ball seat and the positioning clamping wheel structure by bolts;

[0046] Cam bearing followers are fixedly connected to four corners of the tray lower bottom plate by bolts;

[0047] Buffer blocks are installed between the tray lower bottom plate and the cushion plates;

[0048] The buffer blocks and the cushion plates are fixedly connected to both sides of the upper end surface of the tray lower bottom plate by bolts;

[0049] Further, the lower layer mounting mechanism comprises:

[0050] A first bottom plate block and a second bottom plate block;

[0051] The first bottom plate block and the second bottom plate block are fixedly installed on the bottom of the tray lower bottom plate by bolts.

[0052] In the above technical solution, the brake assembly is assembled on the tray, and has the following beneficial effects:

[0053] The brake assembly subassembly tray is provided with four subassembly groups, which are respectively corresponding to left front, right front, left rear and right rear, are symmetrical left and right, and are integrated into a whole body by an upper mounting mechanism, a rotating mechanism and a lower mounting mechanism, so that synchronous subassembly of four brake assemblies of one vehicle can be quickly and safely completed, and the brake assembly subassembly efficiency is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0055] Figure 1 A structure schematic view of the brake assembly subassembly tray provided by the embodiment of the present application is shown in the figure.

[0056] Figure 2 A partial structure schematic view of the brake assembly subassembly tray provided by the embodiment of the present application is shown in the figure.

[0057] Figure 3 A structure schematic view of the brake assembly subassembly tray provided by the embodiment of the present application is shown in the figure.

[0058] Figure 4 A front view of the brake assembly subassembly tray provided by the embodiment of the present application is shown in the figure.

[0059] Figure 5 A top view of the brake assembly subassembly tray provided by the embodiment of the present application is shown in the figure.

[0060] Figure 6 A bottom view of the brake assembly subassembly tray provided by the embodiment of the present application is shown in the figure.

[0061] Explanation of reference signs:

[0062] 1, upper mounting mechanism; 2, rotating mechanism; 3, lower mounting mechanism;

[0063] 11, upper bottom plate of tray; 12, first positioning assembly; 13, supporting assembly; 14, fixed pressure plate assembly;

[0064] 121, positioning pin; 122, positioning seat;

[0065] 131, cylindrical support body; 132, first mounting base; 133, first polyurethane block;

[0066] 141, supporting leg; 142, clamp; 143, second mounting base;

[0067] 21, swivel bearing assembly; 22, universal ball assembly; 23, second positioning assembly; 24, handle assembly;

[0068] 211, swivel bearing; 212, upper bearing connecting plate; 213, lower bearing connecting plate; 214, positioning clamping plate; 215, tray swivel support plate;

[0069] 221, universal ball body; 222, ball seat;

[0070] 231, positioning clamping wheel structure;

[0071] 241, positioning pin assembly;

[0072] 31, tray lower bottom plate; 32, cam bearing follower; 33, buffer block assembly; 34, cushion plate; 35, bottom plate block part one; 36, bottom plate block part two. DETAILED DESCRIPTION

[0073] In order for those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0074] It should be noted that the terms "below", "lateral", "above", "bottom", "periphery", "two sides" and the like used herein indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Similar expressions are only for the purpose of illustration, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0075] Referring to Figures 1-6 as shown;

[0076] The brake assembly is assembled into a tray, comprising:

[0077] The upper mounting mechanism 1 is distributedly mounted with four groups of brake assemblies for assembly.

[0078] The rotating mechanism 2 is installed below the upper mounting mechanism 1.

[0079] The lower mounting mechanism 3 is located below the rotating mechanism 2 and is connected and fixed with the rotating mechanism 2.

[0080] Specifically, the brake assembly is assembled in a tray, mainly composed of three parts, from top to bottom, the upper mounting mechanism 1, the rotating mechanism 2 and the lower mounting mechanism 3, four groups of structures for mounting brake discs are arranged on the upper mounting mechanism 1, which can simultaneously satisfy the assembly of the left front, left rear, right front and right rear brake disc assemblies of the vehicle, the rotating mechanism 2 in the middle layer is connected with the upper mounting mechanism 1 and the lower mounting mechanism 3 respectively, the rotating mechanism 2 can drive the upper mounting mechanism 1 to rotate, so as to facilitate operation in the assembly process, the lower mounting mechanism 3 is fixed with part of the rotating mechanism 2, which plays a role of auxiliary support and buffering.

[0081] The upper mounting mechanism 1 comprises:

[0082] The tray upper bottom plate 11;

[0083] The first positioning assembly 12, a plurality of first positioning assemblies 12 are distributed and installed at the four corners of the upper end face of the tray upper bottom plate 11;

[0084] The support assembly 13, a plurality of support assemblies 13 are distributed and installed at the side of the first positioning assembly 12;

[0085] The fixed pressure disc assembly 14, a plurality of fixed pressure disc assemblies 14 are distributed and installed on the tray upper bottom plate 11 and correspond to the positions of the support assemblies 13.

[0086] The first positioning assembly 12 has a positioning pin 121;

[0087] The bottom of the positioning pin 121 is fixedly connected with a positioning seat 122;

[0088] The positioning seat 122 is fixed on the tray upper bottom plate 11 by bolts.

[0089] The support assembly 13 has a cylindrical support body 131;

[0090] The bottom of the cylindrical support body 131 is fixedly connected with a first mounting base 132;

[0091] A first polyurethane block 133 is installed above the cylindrical support body 131;

[0092] The first mounting base 132 and the first polyurethane block 133 are fixed on the tray upper bottom plate 11 and the cylindrical support body 131 respectively by bolts.

[0093] The fixed pressure disc assembly 14 comprises:

[0094] The support leg 141 has a clamp 142 installed at the upper end;

[0095] The bottom of the support leg 141 is fixedly connected with a second mounting base 143;

[0096] The second mounting base 143 is fixed on the tray upper bottom plate 11 by bolts.

[0097] Specifically, the upper mounting mechanism 1 has a tray upper bottom plate 11, a first positioning assembly 12, a support assembly 13, and a fixed pressure plate assembly 14, wherein the first positioning assembly 12, the support assembly 13, and the fixed pressure plate assembly 14 are collectively distributed on the tray upper bottom plate 11, and each of the first positioning assembly 12, the support assembly 13, and the fixed pressure plate assembly 14 collectively constitutes a structure for mounting a brake disc. The first positioning assembly 12 is used to fix the position of the brake disc to keep it stable during assembly, and the mounting hole of the brake disc corresponds to the position of the positioning pin 121. During operation, the positioning pin 121 is inserted into the mounting hole of the brake disc to keep it fixed. The support assembly 13 is used to support the brake disc, and the support assembly 13 has a cylindrical support body 131 and a first polyurethane block 133. The first polyurethane block 133 is located above the cylindrical support body 131 and contacts the brake disc. The first polyurethane block 133 is made of polyurethane material and has excellent elasticity, compression strength, softness, and buffering performance. The fixed pressure plate assembly 14 has a support leg 141, and the upper end of the support leg 141 is provided with a clamp 142. The clamp 142 clamps another polyurethane block. When the brake disc is placed on the support assembly 13 and positioned and fixed by the first positioning assembly 12, the polyurethane block clamped by the clamp 142 presses the brake disc tightly. The bottom of the positioning pin 121, the cylindrical support body 131, and the support leg 141 is respectively provided with a positioning seat 122, a first mounting base 132, and a second mounting base 143, which are then fixed on the tray upper bottom plate 11 by bolts.

[0098] In use, the front left, rear left, front right, and rear right brake discs are respectively hoisted and placed on the corresponding support assemblies 1 of the tray, so that the positioning pins 121 are inserted into the corresponding brake disc mounting holes. Then, the hub bearing unit and the knuckle assembly are placed on the corresponding positions of the brake disc and fastened with bolts. Then, the fixed pressure plate assembly 14 is pressed downward to tightly press the friction surface of the brake disc. Then, the front left, rear left, front right, and rear right brake calipers are respectively assembled on the corresponding brake discs and fastened with bolts. Finally, the fixed pressure plate assembly 14 is opened, the disassembled brake assembly is hoisted and placed on the transfer tooling, and the tray is used for disassembling the next group of brake assemblies.

[0099] The rotating mechanism 2 comprises:

[0100] The slewing bearing assembly 21 is fixedly connected to the tray upper bottom plate 11;

[0101] The universal ball assembly 22 is fixedly installed at the bottom of the lower mounting mechanism 3;

[0102] The slewing bearing assembly 21 is in sliding connection with the universal ball assembly 22;

[0103] The second positioning assembly 23 is fixedly connected to the lower mounting mechanism 3.

[0104] The handle assembly 24 is located on one side of the rotary bearing assembly 21 and has one end fixedly installed on the lower mounting mechanism 3.

[0105] The rotary bearing assembly 21 comprises:

[0106] The rotary bearing 211 is formed by the upper bearing connecting plate 212 and the lower bearing connecting plate 213.

[0107] The upper bearing connecting plate 212 is fixedly connected to the tray bottom plate 11 by bolts.

[0108] The positioning clamping plate 214 is distributed around the outer periphery of the upper bearing connecting plate 212 and is fixedly connected to the tray bottom plate 11 by bolts.

[0109] The tray rotary support plate 215 is distributed around the outer periphery of the positioning clamping plate 214 and is fixedly connected to the tray bottom plate 11 by bolts.

[0110] The universal ball assembly 22 comprises:

[0111] The universal ball body 221 and the ball seat 222.

[0112] The plurality of universal ball bodies 221 rotate along the ball seat 222 and drive the tray rotary support plate 215 to rotate synchronously.

[0113] The ball seat 222 is fixedly installed on the lower mounting mechanism 3.

[0114] The second positioning assembly 23 comprises:

[0115] The positioning clamping wheel structure 231.

[0116] The positioning clamping wheel structure 231 is located between the positioning clamping plate 214 and the tray rotary support plate 215.

[0117] Specifically, the rotating mechanism assembly comprises the rotary bearing assembly 21, the universal ball assembly 22, the second positioning assembly 23, and the handle assembly 24, and is mainly used for supporting the upper mounting mechanism 1 and the brake assembly. The universal ball assembly 22 and the rotary bearing assembly 21 enable the brake disc assembly to rotate at any work station, and the second positioning assembly 23 enables the upper mounting mechanism 1 to maintain a fixed posture for sub-assembly work.

[0118] The slewing bearing assembly 21 comprises a slewing bearing 211, a bearing upper connecting plate 212 and a bearing lower connecting plate 213 formed by the slewing bearing 211, a positioning clamping plate 214 and a tray slewing support plate 215, the tray upper bottom plate 11 is connected with the slewing bearing 211, the bearing upper connecting plate 212, the positioning clamping plate 214 and the tray slewing support plate 215 through fastening bolts, and the universal ball body 221 in the universal ball assembly 22 is movably connected with the tray slewing support plate 215, the universal ball body 221 can rotate the tray slewing support plate 215 when rotating, and the tray slewing support plate 215 is fixedly connected on the tray upper bottom plate 11, so that the tray upper bottom plate 11 can rotate synchronously with the tray slewing support plate 215, and the rotation of the tray upper bottom plate 11 facilitates the assembly operation of the brake assembly.

[0119] The second positioning assembly 23 is fixedly connected on the lower layer mounting mechanism 3, in the structure, the second positioning assembly 23 comprises a positioning clamping wheel structure 231 located between the positioning clamping plate 214 and the tray slewing support plate 215 and fixedly connected with the tray lower bottom plate 31 of the lower layer mounting mechanism 3, the positioning clamping wheel structure 231 is in contact with the positioning clamping plate 214 through a clamping wheel, so as to ensure that the tray upper bottom plate 11 always rotates around the center of the tray as the shaft when rotating, and the rotation accuracy is ensured.

[0120] The handle assembly 24 comprises two rotating handles and two positioning pin assemblies 241, when the tray assembly rotates, the rotating handle is pressed down, the positioning pin of the positioning pin assembly 241 is lowered, the tray upper bottom plate 11 is rotated, and the tray assembly can rotate, specifically, as shown in the figure, Figure 2 in the assembly state of the middle positioning pin of the positioning pin assembly 241, the positioning pin is in the high position and is clamped with the tray upper bottom plate 11, the tray upper bottom plate 11 is locked, the rotation of the tray upper bottom plate 11 is ensured, the two sides of the positioning pin are in contact with the rotating handle through a round steel, when it is needed to rotate the tray upper bottom plate 11, the rotating handle is pressed, the handle lowers the positioning pin through the round steel, the positioning pin is separated from the tray upper bottom plate 11, and then the tray upper bottom plate 11 can be rotated by rotating it by hand.

[0121] The lower layer mounting mechanism 3 comprises:

[0122] The tray lower bottom plate 31 is fixedly connected with the ball seat 222 and the positioning clamping wheel structure 231 through bolts respectively;

[0123] The cam bearing follower 32 is connected on the four corners of the tray lower bottom plate 31 through bolts;

[0124] The buffer block 33 is provided with a pad plate 34 between the tray lower bottom plate 31;

[0125] The buffer block 33 and the backing plate 34 are fixedly connected on the two sides of the lower end surface of the tray lower bottom plate 31 through bolts;

[0126] Also includes:

[0127] The bottom plate block one part 35 and the bottom plate block two part 36;

[0128] The bottom plate block one part 35 and the bottom plate block two part 36 are installed on the bottom of the tray lower bottom plate 31 through bolts.

[0129] Specifically, the lower layer mounting mechanism 3 includes a tray lower bottom plate 31, a cam bearing follower 32, a buffer block 33, a bottom plate block one part 35 and a bottom plate block two part 36, the cam bearing follower 32 is connected with the tray lower bottom plate 31 through bolts, the tray assembly plays a positioning guide role when running on the conveying line, the buffer block 33 is fastened with the tray lower bottom plate 31 through the backing plate 34 and bolts, preventing the front and rear tray assemblies from colliding during operation and playing a buffering role, the bottom plate block one part 35 and the bottom plate block two part 36 are connected with the tray lower bottom plate 31 through bolts, and the main role is to convert the friction force generated with the conveying line rollers into the power of the brake disc assembly operation, wherein the ball seat 222 of the universal ball assembly 22 and the positioning card wheel structure 231 are fixed on the tray lower bottom plate 31, so that the tray upper bottom plate 11, the rotating mechanism 2 and the tray lower bottom plate 31 are connected with each other to form an integral structure.

[0130] The above only describes some exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for ordinary skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the present application.

Claims

1. A brake assembly kit tray, characterized by, The utility model relates to a brake assembly subassembly tray, including: Upper layer installation mechanism (1), four groups of brake assembly are installed in distribution to assemble; Rotary mechanism (2), rotary mechanism (2) is installed below upper layer installation mechanism (1); Lower layer installation mechanism (3), lower layer installation mechanism (3) is located below rotary mechanism (2) and is connected with rotary mechanism (2) fixedly.

2. The brake assembly packaging tray of claim 1, wherein, The upper layer installation mechanism (1) includes: Tray upper bottom plate (11); First positioning assembly (12), multiple groups of first positioning assembly (12) are installed in distribution at the four corners of the upper end surface of tray upper bottom plate (11); Support assembly (13), multiple groups of support assembly (13) are installed in distribution at the side of first positioning assembly (12); Fixed pressure plate assembly (14), multiple groups of fixed pressure plate assembly (14) are installed in distribution on tray upper bottom plate (11) and correspond with the position of support assembly (13).

3. The brake assembly subassembly tray of claim 2, wherein: The first positioning assembly (12) has a positioning pin (121); The bottom of the positioning pin (121) is fixedly connected with a positioning seat (122); The positioning seat (122) is fixed on the tray upper bottom plate (11) by bolts.

4. The brake assembly subassembly tray of claim 2, wherein: The support assembly (13) has a cylindrical support body (131); The bottom of the cylindrical support body (131) is fixedly connected with a first mounting base (132); A first polyurethane block (133) is installed above the cylindrical support body (131); The first mounting base (132) and the first polyurethane block (133) are fixed on the tray upper bottom plate (11) and the cylindrical support body (131) respectively by bolts.

5. The brake assembly packaging tray of claim 2, wherein, The fixed pressure plate assembly (14) includes: A support leg (141) has a clamp (142) installed on the upper end thereof; The bottom of the support leg (141) is fixedly connected with a second mounting base (143); The second mounting base (143) is fixed on the tray upper bottom plate (11) by bolts.

6. The brake assembly packaging tray of claim 2, wherein, The rotary mechanism (2) includes: A slewing bearing assembly (21) is fixedly connected to the tray upper bottom plate (11); A universal ball assembly (22) is fixedly installed at the bottom of the lower layer installation mechanism (3); The slewing bearing assembly (21) is in sliding connection with the universal ball assembly (22); A second positioning assembly (23) is fixedly connected to the lower layer installation mechanism (3); A handle assembly (24) is located on one side of the slewing bearing assembly (21), and one end of the handle assembly (24) is fixedly installed on the lower layer installation mechanism (3).

7. The brake assembly packaging tray of claim 6, wherein, The slewing bearing assembly (21) includes: A slewing bearing (211) forms an upper bearing connecting plate (212) and a lower bearing connecting plate (213); The upper bearing connecting plate (212) is fixedly connected to the tray upper bottom plate (11) by bolts. Positioning card plate (214) is distributed in the outer periphery of bearing upper connecting plate (212) and is fixedly connected on tray bottom plate (11) through bolts; Tray rotation support plate (215) is distributed in the outer periphery of positioning card plate (214) and is fixedly connected on tray bottom plate (11) through bolts.

8. The brake assembly packaging tray of claim 7, wherein, The universal ball assembly (22) comprises: Universal ball body (221) and ball seat (222); A plurality of universal ball bodies (221) rotate along the ball seat (222) and drive the tray rotation support plate (215) to rotate synchronously; The ball seat (222) is fixedly installed on the lower layer mounting mechanism (3).

9. The brake assembly packaging tray of claim 8, wherein, The second positioning assembly (23) comprises: Positioning card wheel structure (231); The positioning card wheel structure (231) is located between the positioning card plate (214) and the tray rotation support plate (215).

10. The brake assembly packaging tray of claim 9, wherein, The lower layer mounting mechanism (3) comprises: Tray lower bottom plate (31), which is fixedly connected with the ball seat (222) and the positioning card wheel structure (231) through bolts respectively; Cam bearing follower (32) is connected through bolts at four corners of the tray lower bottom plate (31); Buffer block (33), a spacer plate (34) is installed between the buffer block (33) and the tray lower bottom plate (31); The buffer block (33) and the spacer plate (34) are fixedly connected on both sides of the upper end surface of the tray lower bottom plate (31) through bolts; Further comprising: Bottom plate block one part (35) and bottom plate block two parts (36); The bottom plate block one part (35) and the bottom plate block two parts (36) are distributedly installed on the bottom of the tray lower bottom plate (31) through bolts.

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