Oil drum transporter

Abstract

The utility model discloses an oil drum transporter, comprising a frame, a telescopic mechanism and an adjustable frame; the frame is used to be installed in front of a forklift, the frame comprises a vertical connecting plate and a horizontal fork plate, the rear side of the connecting plate is used to be connected and fixed with the forklift, the fork plate is arranged at the bottom of the connecting plate, and the fork plate extends toward the front side; one end of the telescopic mechanism is connected to the frame, and the other end is connected to the adjustable frame, which is used to drive the adjustable frame to reciprocate forward and backward; the adjustable frame reciprocates between the upper part of the fork plate and the upper part of the front side of the fork plate; the bottom of the adjustable frame has a hollow frame-shaped area, and the front and rear widths of the frame-shaped area are adjustable. Thus, convenient, fast, reliable and batch transport of goods such as oil drums can be realized; and the adjustable frame can be used for transporting goods of different quantities, which is more practical; during the movement of the forklift, the adjustable frame always surrounds and wraps the goods, which is safe and reliable.

Description

Technical Field

[0001] The utility model relates to a forklift attachment, in particular to an oil drum transporter. Background Art

[0002] Large-capacity cooking oil (about 20L) is currently mostly transported by hooks, that is, a tool is hung on the forklift, on which a row of hooks are welded according to the size of the oil barrel. When transporting, the hook moves to the top of the oil barrel, then the forklift descends, the hook moves to the handle attachment on the oil barrel, and then the forklift moves sideways to move the hook into the handle, and then the frame is lifted to move the cooking oil off the ground.

[0003] The disadvantage of this solution is that the hooks are welded, while the handle of the cooking oil is movable, which may cause some hooks to not be hooked into the handle during transportation. Therefore, another operator is often required to check the hooks during actual use, which wastes manpower and easily causes safety hazards.

[0004] Another example is a forklift oil barrel handling attachment disclosed in Chinese patent publication number CN105399010A. In this scheme, when carrying an oil barrel, the first clamping arm and the second clamping arm cooperate with each other to fix the oil barrel and then drive the oil barrel off the ground by the fork; when the oil barrel is off the ground, the third driving mechanism drives the first and second forks to extend to the lower end of the oil barrel at the same time to lift the oil barrel, and then carry it. In this scheme, only one oil barrel can be carried at a time, and the oil barrel is fixed by clamping and fixing. It is not suitable for edible oil barrels, because the barrel wall of edible oil barrels is relatively thin and can be easily broken or deformed by the clamping arm. Utility Model Content

[0005] The utility model aims to provide an oil drum carrier, which has the advantages of saving manpower, being convenient and practical, and being safe and reliable.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] An oil drum transporter comprises a frame, a telescopic mechanism and an adjustable frame;

[0008] The frame is used to be installed in front of a forklift, and the frame includes a vertical connecting plate and a horizontal fork plate, the rear side of the connecting plate is used to be connected and fixed with the forklift, the fork plate is arranged at the bottom of the connecting plate, and the fork plate extends toward the front side;

[0009] One end of the telescopic mechanism is connected to the frame, and the other end is connected to the adjustable frame, and is used to drive the adjustable frame to reciprocate forward and backward; the adjustable frame reciprocates between directly above the fork plate and above the front side of the fork plate;

[0010] The bottom inside the adjustable frame body has a hollow frame-shaped area, and the front-back width of this frame-shaped area is adjustable.

[0011] Furthermore, the adjustable frame body includes a rear frame plate, a front frame body, and an adjustment mechanism; the front frame body is in a "冂" shape with an opening at the rear side, the rear frame plate is slidably assembled at the opening of the front frame body, and the frame-shaped area is formed between the rear frame plate and the front frame body; the adjustment mechanism drives the rear frame plate and the front frame body to approach or separate in the front-back direction to adjust the front-back width of the frame-shaped area.

[0012] Furthermore, the front frame body includes a front frame plate, a left frame plate, and a right frame plate that are integrally connected. The left frame plate and the right frame plate are arranged at intervals left and right. The two ends of the front frame plate are fixedly connected to the front ends of the left frame plate and the right frame plate. The rear frame plate is located at the rear side of the front frame body and between the left frame plate and the right frame plate.

[0013] Furthermore, the upper part of the rear frame plate extends out of the top of the front frame body, and a slider is installed on the left side and / or the right side of the upper part of the rear frame plate; a slide rail is provided corresponding to the slider on the upper part of the front frame body, and this slide rail extends in the front-back direction and is slidably assembled with this slider.

[0014] Furthermore, the adjustment mechanism includes a hydraulic motor, an adjustment gear, and an adjustment rack; the hydraulic motor is installed on the rear frame plate, the power output end of the hydraulic motor is installed with this adjustment gear, this adjustment rack is arranged in the front-back direction on the upper part of the left side or the right side of the front frame body, and the adjustment rack meshes with the adjustment gear.

[0015] Furthermore, the upper part of the rear frame plate extends out of the top of the front frame body, and a travel switch is installed on the left side and / or the right side of the upper part of the rear frame plate; a number of equally spaced limit blocks are arranged along the front-back direction on the top of the front frame body, and each limit block is used to cooperate with and trigger this travel switch.

[0016] Furthermore, a stop valve is provided on the connecting plate, and a stop plate is provided at the rear end of the adjustable frame body; when the whole adjustable frame body moves backward to directly above the fork plate, this stop plate triggers this stop valve and is used to control the telescopic mechanism to stop.

[0017] Furthermore, a flange protrudes outward from the front end of the fork plate, and an abutting step is formed between the flange and the top surface of the fork plate.

[0018] Furthermore, the telescopic mechanism is a scissor-type bracket. The rear end of the scissor-type bracket is connected to the connecting plate, and the front end of the scissor-type bracket is connected to the adjustable frame body.

[0019] Furthermore, the middle part of the rear frame plate has a mounting portion, the upper part of the mounting portion extends out of the top of the front frame body, and sliders are installed on the left and right sides of the upper part of the mounting portion; two slide rails are provided on the top of the front frame body corresponding to the two sliders, the two slide rails are spaced left and right and extend front and back, and the tops of the two slide rails are respectively slidably assembled with the two sliders; the left frame plate and the right frame plate are respectively located on the left and right sides below the two slide rails, and the tops of the left frame plate and the right frame plate are respectively connected and fixed to the bottom of the slide rails on the same side through a plurality of side rib bars; the front ends of the two slide rails are respectively connected to the top of the front frame plate with front rib bars, and the front ends of the two slide rails are also connected with upper rib bars.

[0020] After adopting the above technical solution, during operation: 1) the frame rises, the telescopic mechanism is extended, and the front and rear widths of the frame area of ​​the adjustable frame are set according to the specifications of the goods. 2) The forklift runs above the goods, the frame descends, and the adjustable frame wraps the goods. 3) The telescopic mechanism is retracted and the goods are pulled onto the fork plate. 4) The forklift runs to the designated location and pushes the goods out and places them at the destination. 5) The frame rises, driving the adjustable frame to separate from the goods, completing a working cycle.

[0021] The oil drum transporter is installed on a forklift as a forklift attachment, and can transport oil drums (especially edible oil drums) and other goods conveniently, quickly, reliably and in batches. The utility model cooperates with the adjustable frame and the fork plate, and adopts a wrapping and dragging method, which can better protect the oil drum from damage compared with the existing clamping and fixing method, and is suitable for goods such as thin-walled edible oil drums. Moreover, the adjustable frame can transport goods of different quantities, and is more practical. At the same time, after the goods are transported to the fork plate, during the movement of the forklift, the adjustable frame always surrounds and wraps the goods, which can prevent the goods from falling out and being damaged or injuring workers, and has high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of an embodiment of the utility model;

[0023] Figure 2 Another perspective view of an embodiment of the present invention;

[0024] Figure 3 A top view of an embodiment of the utility model;

[0025] Figure 4 It is a front view of an embodiment of the utility model;

[0026] Figure 5 for Figure 3 Sectional view at AA;

[0027] Figure 6 It is a schematic diagram of the working state of an embodiment of the utility model (I), showing that the adjustable frame is extended;

[0028] Figure 7 It is a schematic diagram of the working state of an embodiment of the utility model (II), showing the retraction of the adjustable frame;

[0029] Figure 8 A three-dimensional diagram of an adjustable frame according to an embodiment of the utility model;

[0030] Fig. 9 A side view of a frame according to an embodiment of the present invention;

[0031] Fig.10 It is a three-dimensional diagram of a telescopic bracket according to an embodiment of the utility model.

[0032] Explanation of reference numerals: frame 10, connecting plate 1, stop valve 11, fork plate 2, flange 21, top step 22, telescopic mechanism 20, adjustable frame 30, frame area S, rear frame plate 3, mounting portion 31, slider 32, slide groove 321, travel switch 33, front frame 4, front frame plate 41, left frame plate 42, right frame plate 43, slide rail 44, side rib rod 45, front rib rod 46, upper rib rod 47, limit block 48, stop plate 49, adjustment mechanism 5, hydraulic motor 51, adjustment gear 52, adjustment rack 53. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] like Figures 1 to 10 As shown, an oil drum transporter of the utility model comprises a frame 10 , a telescopic mechanism 20 and an adjustable frame body 30 .

[0035] like Figure 1 and Figure 2 The frame 10 is used to be installed in front of a forklift (not shown), and the frame 10 includes a vertical connecting plate 1 and a horizontal fork plate 2 (see Fig. 9 ), the rear side of the connecting plate 1 is used to be connected and fixed with a forklift, the fork plate 2 is arranged at the bottom of the connecting plate 1, and the fork plate 2 extends toward the front side; thus, the forklift can control the connecting plate 1 of the frame 10 to rise and fall, and drive the fork plate 2 to rise and fall.

[0036] See also Figure 6 and Figure 7, one end of the telescopic mechanism 20 is connected to the frame 10, and the other end is connected to the adjustable frame 30, which is used to drive the adjustable frame 30 to reciprocate back and forth; the adjustable frame 30 reciprocates between directly above the fork plate 2 and above the front side of the fork plate 2; the bottom inside the adjustable frame 30 has a hollow frame-shaped area S, and the front-back width of this frame-shaped area S is adjustable.

[0037] Therefore, during operation: 1) The frame 10 rises, extends the telescopic mechanism 20, and sets the front-back width of the frame-shaped area S of the adjustable frame 30 according to the specifications of the goods (refer to Figure 6 ). 2) The forklift runs above the goods, the frame 10 descends, and the adjustable frame 30 wraps the goods inside. 3) The telescopic mechanism 20 retracts, pulling the goods onto the fork plate 2 (refer to Figure 7 ). 4) The forklift runs to the designated location and pushes the goods out and places them at the destination. 5) The frame 10 rises, driving the adjustable frame 30 to separate from the goods, completing one working cycle.

[0038] Combined with the above, the present utility model uses this oil barrel handler as a forklift attachment installed on the forklift, which can conveniently, quickly, reliably and batch handle goods such as oil barrels (especially oil barrels for edible oil); moreover, the adjustable frame 30 can handle different quantities of goods, with higher practicability; at the same time, after the goods are transported onto the fork plate 2, during the movement of the forklift, the adjustable frame 30 always wraps and surrounds the goods, which can prevent the goods from falling out and being damaged or injuring the staff, with high safety and reliability.

[0039] As Figure 3 and Figure 8 shown, in this embodiment, the adjustable frame 30 includes a rear frame plate 3, a front frame body 4 and an adjustment mechanism 5; the front frame body 4 can be in a "冂"-shaped with an open rear side, and the rear frame plate 3 is slidably assembled at the opening of the front frame body 4 to form a net-shaped frame, which is convenient for surrounding and wrapping cylindrical oil barrels, and the frame-shaped area S is formed between the rear frame plate 3 and the front frame body 4; the adjustment mechanism 5 drives the rear frame plate 3 and the front frame body 4 to approach or separate from each other in the front-back direction to adjust the front-back width of the frame-shaped area S. In this embodiment, the left-right width of the adjustable frame 30 can wrap 1 row of 5 oil barrels, and by adjusting the front-back width of the frame-shaped area S, the front-back width of the adjustable frame 30 can wrap at least 1 row of oil barrels and at most 5 rows of oil barrels, realizing batch handling of up to 25 oil barrels, which can greatly improve the handling efficiency. As Figure 6 and Figure 7 shown, the adjustable frame 30 shown in the figure can wrap 3 rows of 15 oil barrels.

[0040] Specifically, as Figure 8The front frame 4 includes a front frame plate 41, a left frame plate 42 and a right frame plate 43 connected in an integral manner, the left frame plate 42 and the right frame plate 43 are arranged at intervals on the left and right sides, the two ends of the front frame plate 41 are connected and fixed to the front ends of the left frame plate 42 and the right frame plate 43, and the rear frame plate 3 is located at the rear side of the front frame 4 and between the left frame plate 42 and the right frame plate 43. The front, rear, left and right frame plates can all be a mesh plate structure with multiple hollows, so as to reduce the weight of the adjustable frame 30 while maintaining the structural strength, so as to facilitate the control of the forklift.

[0041] Furthermore, the middle part of the rear frame plate 3 has a mounting portion 31, the upper part of the mounting portion 31 extends out of the top of the front frame body 4, and sliders 32 are installed on the left and right sides of the upper part of the mounting portion 31; two slide rails 44 are provided on the upper top surface of the front frame body 4 corresponding to the two sliders 32, the two slide rails 44 are spaced left and right and extend front and back, and the tops of the two slide rails 44 are respectively slidably assembled with the two sliders 32; see Figure 5 In this embodiment, the bottom of the slider 32 has a slide groove 321, and the length of the slider 32 is smaller than the slide rail 44, and the slide rail 44 is "T"-shaped, and the top of the slide rail 44 is vertically stuck in the slide groove 321, while realizing horizontal sliding cooperation in the front and rear directions.

[0042] Thus, the rear frame plate 3 can slide back and forth along the slide rails 44 in the front frame body 4 by means of the slider 32 , and the mounting portion 31 extending out from the top of the front frame body 4 can move between the two slide rails 44 .

[0043] See also Figure 4 and Figure 5 The left frame plate 42 and the right frame plate 43 are respectively located on the left and right sides below the two slide rails 44, and the tops of the left frame plate 42 and the right frame plate 43 are respectively connected and fixed to the bottom of the slide rail 44 on the same side through a plurality of side ribs 45; since the slide rail 44 is on the inner side of the front frame body 4, the side ribs 45 on the left and right sides can respectively adopt mutually symmetrical inverted "L" shapes (see Figure 4 ), so as to make room for the goods; and in this embodiment, five side ribs 45 are arranged evenly spaced front and back on each side. The side ribs 45 can reduce weight and increase the height of the adjustable frame 30, so that the oil drum can be wrapped and prevented from tipping over during movement.

[0044] See also Figure 1 , and the front rib bars 46 are connected between the front ends of the two slide rails 44 and the top of the front frame plate 41, and the upper rib bars 47 are also connected between the front ends of the two slide rails 44. Thus, the frame plates and rib bars of the front frame body 4 are connected as one, thereby improving the structural strength.

[0045] like Figure 1 and Figure 2As shown, in this embodiment, the adjusting mechanism 5 includes a hydraulic motor 51, an adjusting gear 52, and an adjusting rack 53; the hydraulic motor 51 can be installed on the front side of the rear frame plate 3, and the power output end of the hydraulic motor 51 is directed toward the right side of the front frame body 4, and the adjusting gear 52 is installed; and the adjusting rack 53 is arranged at the upper part of the right side of the front frame body 4 along the front-to-back direction. Specifically, the adjusting rack 53 of this embodiment is arranged at the bottom of the right slide rail 44, and the adjusting rack 53 is meshed with the adjusting gear 52.

[0046] Thus, the hydraulic motor 51 drives the adjusting gear 52 to rotate, which can drive the adjusting rack 53 to move forward and backward, so that the rear frame plate 3 and the front frame body 4 can be relatively separated or approached front and back, and the front and rear width of the frame-shaped area S can be adjusted. In this embodiment, the rear frame plate 3 is connected to the telescopic mechanism 20, so the front frame body 4 is mainly moved forward and backward relative to the rear frame plate 3.

[0047] The adjustment mechanism 5 of the present embodiment adopts a structure of gears and racks. Of course, other structures such as motors and linear modules, cylinders and sliders may also be adopted, and the present embodiment is not limited thereto.

[0048] like Figure 1 , Figure 3 and Figure 8 As shown, in this embodiment, a travel switch 33 is also installed on the left side of the upper part of the rear frame plate 3; and a plurality of evenly spaced limit blocks 48 are arranged on the top of the front frame body 4 along the front-to-back direction, and each limit block 48 is used to cooperate with triggering the travel switch 33. In this way, the front frame body 4 can be accurately positioned according to different cargo sizes.

[0049] Specifically, in this embodiment, the limit blocks 48 are set to 5, which can be respectively arranged on the top surfaces of the connection ends of the 5 side ribs 45 and the slide rails 44 to achieve five-stage displacement positioning of the front frame 4, so that the front and rear widths of the frame area S can be adjusted from accommodating 1 row of oil barrels, 2 rows of oil barrels...5 rows of oil barrels in sequence, that is, when the adjustment mechanism 5 drives the adjustment rack 53 to drive the front frame 4 to move forward and backward, the travel switch 33 is made to touch the limit blocks 48 at different positions to achieve accurate positioning of the front frame 4. For example, Figure 7 As shown in the figure, the travel switch 33 of the rear frame plate 3 is matched with the third limit block 48 from the front to the back on the front frame 4, so the adjustable frame 30 can accommodate 3 rows of oil drums.

[0050] like Figure 7As shown, in this embodiment, when the front frame 4 of the adjustable frame 30 moves backward relative to the rear frame plate 3, the rear end of the front frame 4 will extend out from the rear side of the rear frame plate 3. In order to prevent the rear end of the front frame 4 extending backward from hitting the forklift cab during the retraction process of the adjustable frame 30 controlled by the telescopic mechanism 20, a stop valve 11 is provided on the connecting plate 1 of the frame 10, and a stop plate 49 is provided at the rear end of the front frame 4 of the adjustable frame 30. Therefore, when the adjustable frame 30 moves backward as a whole to the position just above the fork plate 2, the stop plate 49 triggers the stop valve 11 (see Figure 1 and Figure 7 ), and is used to control the telescopic mechanism 20 to stop, stop the movement, and prevent the adjustable frame 30 from continuing to move backward and touching the forklift.

[0051] In this embodiment, the adjustment rack 53 and the travel switch 33 are respectively arranged on the right and left sides of the adjustable frame 30. Of course, the positions of the two can also be swapped or arranged on the same side.

[0052] Another example Fig. 9 As shown, the front end of the fork plate 2 in this embodiment protrudes outward with a flange 21, and a top step 22 is formed between the flange 21 and the top surface of the fork plate 2. Therefore, during operation, the front end of the fork plate 2 can be matched with a pallet (not shown) on which goods are placed, so that the edge of the pallet can be just located on the top step 22, and during the retraction process of the telescopic mechanism 20, the fork plate 2 is fixed and can be pressed against the pallet, and several rows of goods are pulled back under the drive of the adjustable frame 30, and finally placed on the fork plate 2 stably.

[0053] like Fig.10 As shown, in this embodiment, the telescopic mechanism 20 adopts a common scissor-type bracket to have a better tensile force. Specifically, the rear end of the scissor-type bracket is connected to the connecting plate 1, and the front end of the scissor-type bracket is connected to the rear frame plate 3 of the adjustable frame 30.

[0054] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

[0055] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0056] In the description of the present application, "multiple" and "several" mean two or more than two, unless otherwise clearly and specifically defined. In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "install", "connect", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. An oil drum carrier, characterized in that: It includes a frame, a telescopic mechanism and an adjustable frame body; The frame is used to be installed in front of a forklift. The frame includes a vertical connecting plate and a horizontal fork plate. The rear side of the connecting plate is used to be fixedly connected to the forklift. The fork plate is arranged at the bottom of the connecting plate and extends forward; One end of the telescopic mechanism is connected to the frame, and the other end is connected to the adjustable frame body, and is used to drive the adjustable frame body to reciprocate back and forth; The adjustable frame body reciprocates between directly above the fork plate and above the front side of the fork plate; The bottom inside the adjustable frame body has a hollow frame-shaped area, and the front-back width of the frame-shaped area is adjustable.

2. The oil drum carrier according to claim 1, characterized in that: The adjustable frame body includes a rear frame plate, a front frame body and an adjustment mechanism; The front frame body is in a "冂" shape with an open rear side. The rear frame plate is slidably assembled at the opening of the front frame body, and the frame-shaped area is formed between the rear frame plate and the front frame body; The adjustment mechanism drives the rear frame plate and the front frame body to approach or separate in the front-back direction to adjust the front-back width of the frame-shaped area.

3. The oil drum carrier according to claim 2, characterized in that: The front frame body includes integrally connected front frame plates, left frame plates and right frame plates. The left frame plate and the right frame plate are arranged at intervals left and right. The two ends of the front frame plate are fixedly connected to the front ends of the left frame plate and the right frame plate. The rear frame plate is located behind the front frame body and between the left frame plate and the right frame plate.

4. The oil drum carrier according to claim 2, characterized in that: The upper part of the rear frame plate protrudes out of the top of the front frame body. A slider is installed on the left side and / or the right side of the upper part of the rear frame plate; A slide rail corresponding to the slider is arranged on the upper part of the front frame body. The slide rail extends back and forth and is slidably assembled with the slider.

5. The oil drum carrier according to claim 2, characterized in that: The adjustment mechanism includes a hydraulic motor, an adjustment gear and an adjustment rack; The hydraulic motor is installed on the rear frame plate. The power output end of the hydraulic motor installs the adjustment gear. The adjustment rack is arranged along the front-back direction on the upper part of the left side or the right side of the front frame body, and the adjustment rack meshes with the adjustment gear.

6. The oil drum carrier according to claim 2, characterized in that: The upper part of the rear frame plate protrudes out of the top of the front frame body. A travel switch is installed on the left side and / or the right side of the upper part of the rear frame plate; A number of evenly spaced limit blocks are arranged along the front-back direction on the top of the front frame body. Each limit block is used to cooperate with and trigger the travel switch.

7. The oil drum carrier according to claim 1, characterized in that: A stop valve is provided on the connecting plate, and a stop plate is provided at the rear end of the adjustable frame body; When the whole adjustable frame body moves backward to directly above the fork plate, the stop plate triggers the stop valve and is used to control the telescopic mechanism to stop.

8. The oil drum carrier according to claim 1, characterized in that: The front end of the fork plate protrudes outward with a flange, and a top step is formed between the flange and the top surface of the fork plate.

9. The oil drum carrier according to claim 1, characterized in that: The telescopic mechanism is a scissor support. The rear end of the scissor support is connected to the connecting plate, and the front end of the scissor support is connected to the adjustable frame body.

10. The oil drum carrier according to claim 3, characterized in that: The middle part of the rear frame plate is provided with a mounting portion, the upper part of the mounting portion extends out from the top of the front frame body, and sliders are installed on the left and right sides of the upper part of the mounting portion; two slide rails are provided on the top of the front frame body corresponding to the two sliders, the two slide rails are spaced left and right and extend front and back, and the tops of the two slide rails are respectively slidably assembled with the two sliders; the left frame plate and the right frame plate are respectively located on the left and right sides below the two slide rails, and the tops of the left frame plate and the right frame plate are respectively connected and fixed to the bottom of the slide rails on the same side through a plurality of side rib bars; the front ends of the two slide rails are respectively connected to the top of the front frame plate with front rib bars, and the front ends of the two slide rails are also connected with upper rib bars.

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