Feeding abrupt slope lifting device for liquid nitrogen instant freezer and working method of feeding abrupt slope lifting device

Abstract

The invention discloses a feeding abrupt slope lifting device for a liquid nitrogen instant freezer and a working method of the feeding abrupt slope lifting device, the cabinet type liquid nitrogen instant freezer comprises a cabinet body and a cabinet door, the feeding abrupt slope lifting device comprises a lifting guide plate, and a cam block is arranged at the lower end of the side, close to the cabinet type liquid nitrogen instant freezer, of the lifting guide plate; a lifting mechanism for controlling one end, close to the instant freezer, of the lifting guide plate to ascend and descend is arranged at the side end of the cam block, the lifting mechanism comprises a traction support connected with one end of the cabinet door, the other end of the traction support is slidably arranged in a mounting groove in a movable guide rail, and the movable guide rail is slidably connected into a guide rail groove; according to the cabinet type liquid nitrogen instant freezer, by arranging the lifting mechanism, the lifting guide plate can be driven to ascend while the cabinet door is opened, and feeding and discharging of the cabinet type liquid nitrogen instant freezer are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of transport devices, and in particular to a steep slope lifting device for loading a liquid nitrogen quick-freezing machine and a working method thereof. Background Art

[0002] Cabinet-type liquid nitrogen quick freezer, because the vaporization temperature of liquid nitrogen is -196°C, there is a very thick insulation layer inside the machine, usually a polyurethane foam layer greater than 150mm, plus universal wheels and foot cup support base for easy movement, the overall height is between 300 and 400mm, making it difficult for material racks loaded with materials to enter and exit the cabinet-type liquid nitrogen quick freezer.

[0003] In view of the above problems, one solution in the prior art is to use a material rack filled with materials in a trailer that is as high as the bottom of the cabinet-type liquid nitrogen quick freezer, and a fixed ramp platform is also required to allow the material rack to be towed on the slope. Another solution is to design a hinged flip ramp, and lower the ramp structure when pushing the material rack into the cabinet-type liquid nitrogen quick freezer; after the material rack is pushed in, before closing the cabinet-type liquid nitrogen quick freezer, flip the ramp structure up.

[0004] However, the first solution mentioned above requires a fixed slope platform and trailer, which increases the time consumed in transportation, increases the number of processes, and reduces production capacity. After the second solution is completed, the slope structure needs to be lowered manually, and the operators must take anti-frostbite measures to prevent low-temperature burns on the surface of the slope structure. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a steep slope lifting device for loading liquid nitrogen quick freezing machine and its working method. By setting a lifting mechanism, the lifting guide plate can be driven to rise at the same time when the cabinet door is opened, which is convenient for loading and unloading of the cabinet-type liquid nitrogen quick freezing machine.

[0006] Technical solution:

[0007] A steep slope lifting device for a liquid nitrogen quick freezing machine, the cabinet-type liquid nitrogen quick freezing machine comprising a cabinet body and a cabinet door, the steep slope automatic lifting device for loading materials comprising a lifting guide plate, a cam block being arranged at the lower end of the lifting guide plate close to the cabinet-type liquid nitrogen quick freezing machine, a lifting mechanism for controlling the lifting of the lifting guide plate close to one end of the quick freezing machine being arranged at the side end of the cam block, the lifting mechanism comprising a traction bracket connected to one end of the cabinet door, the other end of the traction bracket being slidably and rotatably arranged in an installation groove on a movable guide rail, the movable guide rail being slidably connected in the guide rail groove, and the movable guide rail being connected to a toggle block for toggling the cam block to rise and fall.

[0008] Preferably, the traction bracket includes a mounting plate fixedly connected to an end face of the cabinet door near the hinge axis, the mounting plate is provided with a first connecting rod extending in a direction away from the cabinet door, the first connecting rod extends to a position beyond the hinge axis of the cabinet door, the first connecting rod is provided with a second connecting rod extending downward at the end away from the cabinet door, the second connecting rod is slidably connected in the mounting groove at the end away from the first connecting rod, the length direction of the mounting groove is perpendicular to the length direction of the guide rail groove, half of the diameter of the traction track circle of the traction bracket is smaller than the distance from the door hinge axis to the cabinet, and the length of the mounting groove is greater than the diameter of the traction track circle of the traction bracket.

[0009] Preferably, a connection mechanism is provided between the cam block and the lifting guide plate, the connection mechanism comprises two mounting plates arranged opposite to each other, a first rotating shaft parallel to the guide rail groove is rotatably installed between the two mounting plates, the upper end of the cam block is rotatably connected to the first rotating shaft, the cam block is provided at the end of the toggle block away from the traction bracket, the bottom of the cam block is a plane parallel to the bottom surface of the guide rail groove, the side of the cam block close to the toggle block comprises a first slope, and the angle between the plane formed by the bottom end of the first slope away from the toggle block and the first slope is an acute angle. Since the cam block is lifted and lowered in one direction, and the lifting guide plate is a structure with one end rising, the angle between the cam block and the lifting guide plate will change during this process, so by providing a connection mechanism, the angle change between the two is achieved through the first rotating shaft to prevent structural damage.

[0010] Preferably, a heat-insulating layer is provided inside the cabinet, the height of the top of the heat-insulating layer is higher than the height of the bottom of the cabinet door, the side of the cam block close to the toggle block also includes a second slope, the second slope is located at the upper end of the first slope, and the angle between the plane formed by the bottom end of the second slope away from the toggle block and the second slope is an acute angle. With this structure, after the cabinet door is opened to a certain angle, the toggle block can drive the lifting guide plate to continue to rise through the second slope structure on the cam block. Generally, after the cabinet door is opened to an angle that does not block the lifting guide plate, the toggle block reaches the second slope position, and at this time continues to drive the lifting guide plate to rise to the top position of the heat-insulating layer provided inside the cabinet.

[0011] Preferably, a middle plane parallel to the bottom surface of the cam block is provided between the first slope and the second slope.

[0012] Preferably, the lower end of the lifting guide plate close to the cabinet-type liquid nitrogen quick-freezing machine is also provided with a first guide shaft, the first guide shaft is slidably arranged in the first guide groove, the top end of the first guide shaft is rotatably connected to the lifting guide plate through a second rotating shaft, and the second rotating shaft is parallel to the first rotating shaft; the toggle block is a cylindrical structure in line contact with the cam block or a trapezoidal structure in surface contact with the cam block. The purpose of the second rotating shaft 53 is the same as that of the first rotating shaft, the toggle block 34 is a cylindrical structure in line contact with the cam block 2, the cylindrical structure has a high degree of flexibility, and is in line contact with the cam block 2, preferably the cylindrical toggle block is rotatably connected to the moving guide rail; the toggle block 34 adopts a trapezoidal structure, which is in surface contact with the cam block 2, and has a higher degree of stability but a relatively low degree of flexibility.

[0013] The present invention also discloses a working method of a steep slope lifting device for a liquid nitrogen quick freezing machine, comprising the following steps:

[0014] 1) The cabinet door rotates 0°~X1°. During the rotation process, the cabinet door drives the traction bracket to rotate, thereby driving the movable guide rail to move along the guide rail groove. The movable guide rail drives the toggle block to move. When it rotates to X1°, the toggle block contacts the first slope of the cam block;

[0015] 2) The cabinet door continues to rotate X1° to X2°. During this process, the toggle block pushes the first slope to drive the cam block to rise until it reaches X2°, at which time the toggle block leaves the first slope and the top of the lifting guide plate near one end of the quick freezer is at the same height as the bottom of the cabinet door.

[0016] Preferably, after step 2), the method further comprises:

[0017] 3) The cabinet door continues to rotate X2°~X3°, the toggle block is always in contact with the bottom surface of the cam block, and the top of the lifting guide plate close to the quick-freezer is always at the same height as the bottom of the cabinet door.

[0018] Preferably, the cam block further comprises a second slope on a side close to the toggle block, the second slope is located at the upper end of the first slope, and the angle between the plane formed by the bottom end of the second slope away from the toggle block and the second slope is an acute angle; after step 2), the method further comprises:

[0019] 3) The cabinet door continues to rotate by X2° to X3°. During this process, the toggle block pushes the second slope to drive the cam block to rise. When it reaches X3°, the toggle block leaves the second slope and reaches the bottom of the cam block. The top of the lifting guide plate near one end of the quick freezer is at the same height as the bottom of the quick freezer.

[0020] 4) The cabinet door continues to rotate X3°~X4°, the toggle block is always in contact with the bottom surface of the cam block, and the top of the lifting guide plate close to one end of the quick-freezer is always at the same height as the bottom surface of the quick-freezer.

[0021] Preferably, the side of the cam block close to the toggle block further includes a second slope, the second slope is located at the upper end of the first slope, the angle between the plane formed by the bottom end of the second slope away from the toggle block and the second slope is an acute angle, and an intermediate plane parallel to the bottom surface of the cam block is further provided between the first slope and the second slope, and after step 2), the following is further included:

[0022] 3) The cabinet door continues to rotate X2° to X3°. During this process, the toggle block moves along the middle plane, and the top of the lifting guide plate close to the quick-freezer is always at the same height as the bottom surface of the quick-freezer. When the door rotates to X3°, the toggle block contacts the second slope of the cam block.

[0023] 4) The cabinet door continues to rotate X3° to X4°. During this process, the toggle block pushes the second slope to drive the cam block to rise. When it reaches X4°, the toggle block leaves the second slope to the bottom of the cam block, and the top of the lifting guide plate close to one end of the quick freezer is at the same height as the bottom of the quick freezer.

[0024] 5) The cabinet door continues to rotate X4°~X5°, the toggle block is always in contact with the bottom surface of the cam block, and the top of the lifting guide plate close to the quick-freezer is always at the same height as the bottom of the cabinet door.

[0025] Beneficial effect: By setting the lifting mechanism, the lifting guide plate can be driven to rise at the same time when the cabinet door is opened, which is convenient for loading and unloading of the cabinet-type liquid nitrogen quick freezing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of a first embodiment of the present invention;

[0027] Figure 2 This is a partial enlargement of the first embodiment of the present invention. Figure 1 ;

[0028] Figure 3 This is a partial enlargement of the first embodiment of the present invention. Figure 2 ;

[0029] Figure 4 is a schematic diagram of a first traction bracket of the present invention;

[0030] Figure 5 It is a plan view of the traction bracket in the cabinet door closed state according to the first embodiment of the present invention;

[0031] Figure 6 It is a superimposed plan view of the traction bracket in four states according to the first embodiment of the present invention;

[0032] Figure 7 is a perspective view of a second embodiment of the present invention;

[0033] Figure 8 It is a schematic diagram of the cam block of the second embodiment of the present invention;

[0034] Fig. 9 It is a schematic diagram of the cam block of the third embodiment of the present invention. Specific embodiments

[0035] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Embodiment 1

[0037] As Figure 1-6 shown, a feeding steep slope lifting device for a liquid nitrogen quick-freezing machine, the cabinet-type liquid nitrogen quick-freezing machine includes a cabinet body and a cabinet door, a heat-insulating layer is arranged inside the cabinet body, the feeding steep slope automatic lifting device includes a lifting guide plate 1, a cam block 2 is arranged at the lower end of the lifting guide plate 1 close to the cabinet-type liquid nitrogen quick-freezing machine, a lifting mechanism 3 for controlling the lifting of one end of the lifting guide plate 1 close to the quick-freezing machine is arranged at the side end of the cam block 2, the lifting mechanism includes a traction bracket 31 connected to one end of the cabinet door 2, the other end of the traction bracket 31 is slidably and rotatably arranged in an installation groove 321 on a moving guide rail 32, the moving guide rail 32 is slidably connected in a guide rail groove 33, and the moving guide rail 32 is connected with a拨动块 34 for拨动 the cam block to lift.

[0038] In this embodiment, the traction bracket 31 includes a mounting plate 311 fixedly connected to the end face of the cabinet door close to the hinge shaft, a first connecting rod 312 extends from the mounting plate 311 in a direction away from the cabinet door, the first connecting rod 312 extends to a position beyond the hinge shaft of the cabinet door, a second connecting rod 313 extends downward from the end of the first connecting rod 312 away from the cabinet door, the end of the second connecting rod 313 away from the first connecting rod 312 is slidably connected in the installation groove 321, the length direction of the installation groove 321 is perpendicular to the length direction of the guide rail groove 33, and half of the diameter of the traction trajectory circle of the traction bracket is less than the distance from the door hinge shaft to the cabinet machine, and the length of the installation groove 321 is greater than the diameter of the traction trajectory circle of the traction bracket. The diameter D of the traction trajectory circle of the traction bracket needs to satisfy D / 2 < L (the distance from the door hinge shaft to the cabinet machine), so as to ensure that the opening angle of the door reaches 180°. At the same time, the first connecting rod 312 extends to a position beyond the hinge shaft of the cabinet door to form a traction trajectory circle when the cabinet door is opened, and the traction trajectory (the end of the second connecting rod 313 away from the first connecting rod 312) of the traction trajectory circle gradually moves towards the cam block as the cabinet door is opened, and the installation groove 321 is provided to provide the movement of the traction trajectory perpendicular to the guide rail groove 33.

[0039] In this embodiment, a connecting mechanism 4 is arranged between the cam block 2 and the lifting guide plate 1, and the connecting mechanism 4 includes two relatively arranged mounting plates 41, and a first rotating shaft 41 parallel to the guide rail groove 33 is rotatably installed between the two mounting plates 41. The upper end of the cam block 2 is rotatably connected to the first rotating shaft 41, and the cam block 2 is arranged at the end of the toggle block 34 away from the traction bracket 31. The bottom of the cam block 2 is a plane parallel to the bottom surface of the guide rail groove 33, and the side of the cam block 2 close to the toggle block 34 includes a first slope 21, and the angle between the plane formed by the bottom end of the first slope 21 away from the toggle block and the first slope is an acute angle.

[0040] Since the cam block is lifted and lowered in one direction and the lifting guide plate is a structure that rises at one end, the angle between the cam block and the lifting guide plate will change during this process. Therefore, a connecting mechanism is provided to achieve the angle change between the two through the first rotating shaft to prevent structural damage.

[0041] In this embodiment, a first guide shaft 51 is also provided at the lower end of the lifting guide plate 1 on the side close to the cabinet-type liquid nitrogen quick freezing machine. The first guide shaft 51 is slidably arranged in the first guide groove 52. The top end of the first guide shaft 51 is rotatably connected to the lifting guide plate 1 through a second rotating shaft 53, and the second rotating shaft 53 is parallel to the first rotating shaft; the toggle block 34 is a cylindrical structure in line contact with the cam block 2 or a trapezoidal structure in surface contact with the cam block 2.

[0042] The purpose of the second rotating shaft 53 is the same as that of the first rotating shaft mentioned above. The toggle block 34 is a cylindrical structure that is in line contact with the cam block 2. The cylindrical structure has a high degree of flexibility and is in line contact with the cam block 2. Preferably, the cylindrical toggle block is rotatably connected to the movable guide rail; the toggle block 34 adopts a trapezoidal structure and is in surface contact with the cam block 2. It has a higher degree of stability but a relatively low degree of flexibility.

[0043] Example 2

[0044] like Figure 7 As shown, in some cabinet-type liquid nitrogen quick freezing machines, the height of the insulation top inside the cabinet is higher than the height of the bottom of the cabinet door, so the structure of Example 1 still cannot be used for loading and unloading well, and the side of the cam block 2 close to the toggle block 34 also includes a second slope 22, and the second slope 22 is located at the upper end of the first slope, and the angle between the plane formed by the bottom end of the second slope 22 away from the toggle block and the second slope is an acute angle.

[0045] By adopting this structure, after the cabinet door is opened to a certain angle, the toggle block can drive the lifting guide plate to continue to rise through the second slope structure on the cam block. Generally, the toggle block reaches the second slope position after the cabinet door is opened at an angle that will not block the lifting guide plate. At this time, it continues to drive the lifting guide plate to rise to the top position where the insulation layer is provided inside the cabinet body.

[0046] Example 3

[0047] like Figure 8 As shown, on the basis of Embodiment 2, a middle plane 23 parallel to the bottom surface of the cam block is further provided between the first slope 21 and the second slope 22 .

[0048] By adopting this structure, the lifting guide plate can be kept at the bottom of the cabinet door when the cabinet door is opened to a certain angle, which provides more adjustability in overall use.

[0049] Example 4

[0050] The working method of the automatic lifting device for the steep slope of the cabinet-type liquid nitrogen quick-freezing machine in Example 1 comprises the following steps:

[0051] 1) The cabinet door rotates 0° to X1°. During the rotation process, the cabinet door drives the traction bracket to rotate, thereby driving the movable guide rail to move along the guide rail groove. The movable guide rail drives the toggle block to move. When rotating to X1°, the toggle block contacts the first slope 21 of the cam block 2;

[0052] 2) The cabinet door continues to rotate by X1° to X2°. During this process, the toggle block pushes the first slope 21 to drive the cam block to rise. When the toggle block reaches X2°, the toggle block leaves the first slope 21, and the top of the lifting guide plate 1 near one end of the quick-freezer is at the same height as the bottom of the cabinet door.

[0053] 3) The cabinet door continues to rotate X2°~X3°, the toggle block is always in contact with the bottom surface of the cam block 2, and the top of the lifting guide plate 1 close to the quick-freezer is always at the same height as the bottom of the cabinet door.

[0054] like Figure 5 , 6 As shown, Figure 5 This is the plan view of the traction bracket when the cabinet door is closed. Figure 6 The superimposed plan view of the cabinet door at 0°, X1°, X2°, and X3°. It can be understood that when the cabinet door is turned to X1°, the open state of the cabinet door should be sufficient for loading and unloading.

[0055] When the cabinet door rotates from 0° to X1°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the distance between the toggle block and the cam block when the cabinet door is closed. When the cabinet door rotates from X1° to X2°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the projection distance of the first slope of the cam block in the length direction of the guide groove. When the cabinet door rotates from X2° to X3°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is less than the length of the bottom surface of the cam block in the length direction of the guide rail groove.

[0056] Example 5

[0057] The working method of the automatic lifting device for the steep slope of the cabinet-type liquid nitrogen quick-freezing machine in Example 2 comprises the following steps:

[0058] 1) The cabinet door rotates 0° to X1°. During the rotation process, the cabinet door drives the traction bracket to rotate, thereby driving the movable guide rail to move along the guide rail groove. The movable guide rail drives the toggle block to move. When rotating to X1°, the toggle block contacts the first slope 21 of the cam block 2;

[0059] 2) The cabinet door continues to rotate by X1° to X2°. During this process, the toggle block pushes the first slope 21 to drive the cam block to rise. When the toggle block reaches X2°, the toggle block leaves the first slope 21, and the top of the lifting guide plate 1 near one end of the quick-freezer is at the same height as the bottom of the cabinet door.

[0060] 3) The cabinet door continues to rotate by X2° to X3°. During this process, the toggle block pushes the second slope 22 to drive the cam block to rise. When the toggle block reaches X3°, the toggle block leaves the second slope 22 and reaches the bottom surface of the cam block 2. The top of the lifting guide plate 1 close to one end of the quick-freezer is at the same height as the bottom surface of the quick-freezer.

[0061] 4) The cabinet door continues to rotate X3°~X4°, the toggle block is always in contact with the bottom surface of the cam block 2, and the top of the lifting guide plate 1 close to the quick-freezer is always at the same height as the bottom surface of the quick-freezer.

[0062] When the cabinet door rotates from 0° to X1°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the distance between the toggle block and the cam block when the cabinet door is closed; when the cabinet door rotates from X1° to X2°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the projection distance of the first slope of the cam block in the length direction of the guide groove; when the cabinet door rotates from X2° to X3°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the projection distance of the second slope of the cam block in the length direction of the guide groove; when the cabinet door rotates from X3° to X4°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is less than the length of the bottom surface of the cam block in the length direction of the guide rail groove.

[0063] Example 6

[0064] The working method of the automatic lifting device for the steep slope of the cabinet-type liquid nitrogen quick-freezing machine in Example 3 comprises the following steps:

[0065] 1) The cabinet door rotates 0° to X1°. During the rotation process, the cabinet door drives the traction bracket to rotate, thereby driving the movable guide rail to move along the guide rail groove. The movable guide rail drives the toggle block to move. When rotating to X1°, the toggle block contacts the first slope 21 of the cam block 2;

[0066] 2) The cabinet door continues to rotate by X1° to X2°. During this process, the toggle block pushes the first slope 21 to drive the cam block to rise. When the toggle block reaches X2°, the toggle block leaves the first slope 21, and the top of the lifting guide plate 1 near one end of the quick-freezer is at the same height as the bottom of the cabinet door.

[0067] 3) The cabinet door continues to rotate X2° to X3°. During this process, the toggle block moves along the middle plane, and the top of the lifting guide plate 1 close to the quick-freezer is always at the same height as the bottom surface of the quick-freezer. When the door rotates to X3°, the toggle block contacts the second slope 22 of the cam block 2.

[0068] 4) The cabinet door continues to rotate by X3° to X4°. During this process, the toggle block pushes the second slope 22 to drive the cam block to rise. When it reaches X4°, the toggle block leaves the second slope 22 to the bottom of the cam block, and the top of the lifting guide plate 1 close to one end of the quick-freezer is at the same height as the bottom of the quick-freezer.

[0069] 5) The cabinet door continues to rotate X4°~X5°, the toggle block is always in contact with the bottom surface of the cam block 2, and the top of the lifting guide plate 1 close to the quick-freezer is always at the same height as the bottom of the cabinet door.

[0070] When the cabinet door rotates from 0° to X1°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the distance between the toggle block and the cam block when the cabinet door is closed; when the cabinet door rotates from X1° to X2°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the projection distance of the first slope of the cam block in the length direction of the guide groove; when the cabinet door rotates from X2° to X3°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the length of the middle plane of the cam block in the length direction of the guide groove; when the cabinet door rotates from X3° to X4°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is equal to the projection distance of the second slope of the cam block in the length direction of the guide groove; when the cabinet door rotates from X4° to X5°, the distance moved by one end of the traction bracket located in the installation groove in the length direction of the guide rail groove is less than the length of the bottom surface of the cam block in the length direction of the guide rail groove.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A steep slope lifting device for loading liquid nitrogen quick freezing machine, the cabinet type liquid nitrogen quick freezing machine comprises a cabinet body and a cabinet door, characterized in that: The automatic lifting device for loading steep slope comprises a lifting guide plate (1), a cam block (2) is arranged at the lower end of the lifting guide plate (1) close to the cabinet-type liquid nitrogen quick-freezing machine, a lifting mechanism (3) for controlling the lifting of the lifting guide plate (1) close to the quick-freezing machine is arranged at the side end of the cam block (2), the lifting mechanism comprises a traction bracket (31) connected to one end of the cabinet door (2), the other end of the traction bracket (31) is slidably and rotatably arranged in a mounting groove (321) on a movable guide rail (32), the movable guide rail (32) is slidably connected in a guide rail groove (33), and the movable guide rail (32) is connected to a toggle block (34) for toggling the cam block to rise and fall.

2. A steep slope lifting device for loading liquid nitrogen quick freezing machine according to claim 1, characterized in that: The traction bracket (31) comprises a mounting plate (311) fixedly connected to an end face of the cabinet door close to the hinge axis, the mounting plate (311) is provided with a first connecting rod (312) extending in a direction away from the cabinet door, the first connecting rod (312) extends to a position beyond the hinge axis of the cabinet door, a second connecting rod (313) is provided extending downward from an end of the first connecting rod (312) away from the cabinet door, an end of the second connecting rod (313) away from the first connecting rod (312) is slidably connected in a mounting groove (321), the length direction of the mounting groove (321) is perpendicular to the length direction of the guide rail groove (33), half of the diameter of the traction track circle of the traction bracket is less than the distance from the door hinge axis to the cabinet, and the length of the mounting groove (321) is greater than the diameter of the traction track circle of the traction bracket.

3. A steep slope lifting device for loading liquid nitrogen quick freezing machine according to claim 2, characterized in that: A connecting mechanism (4) is provided between the cam block (2) and the lifting guide plate (1), the connecting mechanism (4) comprising two mounting plates (41) arranged opposite to each other, a first rotating shaft (41) parallel to the guide rail groove (33) being rotatably mounted between the two mounting plates (41), the upper end of the cam block (2) being rotatably connected to the first rotating shaft (41), the cam block (2) being provided at an end of the toggle block (34) away from the traction bracket (31), the bottom of the cam block (2) being a plane parallel to the bottom surface of the guide rail groove (33), the side of the cam block (2) close to the toggle block (34) comprising a first slope (21), the angle between the plane formed by the bottom end of the first slope (21) in a direction away from the toggle block and the first slope being an acute angle.

4. The steep slope lifting device for loading liquid nitrogen quick freezing machine according to claim 3, characterized in that: An insulation layer is provided inside the cabinet body, the height of the top of the insulation layer is higher than the height of the bottom of the cabinet door, the side of the cam block (2) close to the toggle block (34) further comprises a second slope (22), the second slope (22) is located at the upper end of the first slope, and the angle between the plane formed by the bottom end of the second slope (22) in a direction away from the toggle block and the second slope is an acute angle.

5. The steep slope lifting device for loading liquid nitrogen quick freezing machine according to claim 4, characterized in that: A middle plane (23) parallel to the bottom surface of the cam block is also provided between the first slope (21) and the second slope (22).

6. The steep slope lifting device for loading liquid nitrogen quick freezing machine according to claim 3, characterized in that: A first guide shaft (51) is further provided at the lower end of the lifting guide plate (1) on the side close to the cabinet-type liquid nitrogen quick freezing machine. The first guide shaft (51) is slidably arranged in a first guide groove (52). The top end of the first guide shaft (51) is rotationally connected to the lifting guide plate (1) via a second rotating shaft (53). The second rotating shaft (53) is parallel to the first rotating shaft. The toggle block (34) is a cylindrical structure in line contact with the cam block (2) or a trapezoidal structure in surface contact with the cam block (2).

7. A working method of the automatic steep slope lifting device for a cabinet-type liquid nitrogen quick freezing machine as claimed in claim 3, characterized in that: The following steps are involved: 1) The cabinet door rotates 0° to X1°. During the rotation process, the cabinet door drives the traction bracket to rotate, thereby driving the movable guide rail to move along the guide rail groove. The movable guide rail drives the toggle block to move. When the toggle block rotates to X1°, the toggle block contacts the first slope (21) of the cam block (2). 2) The cabinet door continues to rotate by X1° to X2°. During this process, the toggle block pushes the first slope (21) to drive the cam block to rise. When the toggle block reaches X2°, the toggle block leaves the first slope (21), and the top of the lifting guide plate (1) near one end of the quick-freezer is at the same height as the bottom of the cabinet door.

8. The working method of the steep slope lifting device for liquid nitrogen quick freezing machine according to claim 7, characterized in that: After step 2) also include 3): The cabinet door continues to rotate X2° to X3°, the toggle block is always in contact with the bottom surface of the cam block (2), and the top of the lifting guide plate (1) close to the quick-freezing machine is always at the same height as the bottom of the cabinet door.

9. The working method of the steep slope lifting device for liquid nitrogen quick freezing machine according to claim 7, characterized in that: The cam block (2) further comprises a second slope (22) on a side close to the toggle block (34), the second slope (22) being located at the upper end of the first slope, and an angle between a plane formed by the bottom end of the second slope (22) in a direction away from the toggle block and the second slope is an acute angle; after step 2), the method further comprises: 3) The cabinet door continues to rotate by X2° to X3°. During this process, the toggle block pushes the second slope (22) to drive the cam block to rise. When the toggle block reaches X3°, the toggle block leaves the second slope (22) and reaches the bottom surface of the cam block (2). The top of the lifting guide plate (1) close to one end of the quick freezer is at the same height as the bottom surface of the quick freezer. 4) The cabinet door continues to rotate X3° to X4°, the toggle block is always in contact with the bottom surface of the cam block (2), and the top of the lifting guide plate (1) close to the quick-freezer is always at the same height as the bottom surface of the quick-freezer.

10. The working method of the steep slope lifting device for liquid nitrogen quick freezing machine according to claim 7, characterized in that: The cam block (2) further comprises a second slope (22) on a side close to the toggle block (34); the second slope (22) is located at the upper end of the first slope; the angle between the plane formed by the bottom end of the second slope (22) in a direction away from the toggle block and the second slope is an acute angle; an intermediate plane (23) parallel to the bottom surface of the cam block is further provided between the first slope (21) and the second slope (22); and after step 2), the method further comprises: 3) The cabinet door continues to rotate by X2° to X3°. During this process, the toggle block moves along the middle plane, and the top of the lifting guide plate (1) close to the quick-freezer is always at the same height as the bottom surface of the quick-freezer. When the door rotates to X3°, the toggle block contacts the second slope (22) of the cam block (2). 4) The cabinet door continues to rotate by X3° to X4°. During this process, the toggle block pushes the second slope (22) to drive the cam block to rise. When the toggle block reaches X4°, the toggle block leaves the second slope (22) and reaches the bottom surface of the cam block. The top of the lifting guide plate (1) near one end of the quick-freezer is at the same height as the bottom surface of the quick-freezer. 5) The cabinet door continues to rotate X4° to X5°, the toggle block is always in contact with the bottom surface of the cam block (2), and the top of the lifting guide plate (1) close to the quick-freezer is always at the same height as the bottom of the cabinet door.

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