Pallet truck sealing small door transmission device for heat preservation cover

Abstract

The utility model discloses a pallet truck closed small door transmission device for a heat preservation cover, and relates to the technical field of driving devices, the pallet truck closed small door transmission device comprises a device body and a heat preservation cover movably installed on the device body, the device body comprises a base and a closed small door, and the two sides of the base are movably connected with the closed small door. A saddle is installed on the top of the base, a steel coil is movably placed on the top of the saddle, and supporting frames for supporting the heat preservation cover are connected to the two sides of the bottom of the saddle. A driving device and a gravity spring composite driving device are installed on the two sides of the supporting frame. Due to the design of the device body and the heat preservation cover movably installed on the device body, the heat preservation cover can be placed on the outer side of a steel coil in the using process of the pallet truck, and heat preservation can be conducted on the steel coil; and after the heat preservation cover is placed, the periphery of the steel coil can be sealed, and the heat preservation performance of the heat preservation cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of driving devices, in particular to a transmission device for a closed small door of a pallet truck for a heat preservation cover. Background Technique

[0002] Steel coil pallet trucks are usually used for handling and transporting steel coils. In steel mills and warehouses, these pallet trucks need to bear high loads and be able to operate flexibly. The transmission system of the pallet truck is its core part, which directly affects the performance and reliability of the vehicle.

[0003] The design of steel coil pallet trucks usually focuses on handling and operating performance, and there are still some obvious disadvantages and challenges regarding the heat preservation function. These problems limit the wide application and effect of heat preservation pallet trucks. The following are some of the main disadvantages:

[0004] Main disadvantages of steel coil pallet trucks in heat preservation

[0005] 1. Insufficient application of heat preservation technology: Most pallet truck designs mainly target handling and load-bearing capacity, lacking consideration for heat preservation.

[0006] As described above, for this reason, we have designed a transmission device for a closed small door of a pallet truck for a heat preservation cover to solve the above problems. Content of the Utility Model

[0007] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a transmission device for a closed small door of a pallet truck for a heat preservation cover.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A transmission device for a closed small door of a pallet truck for a heat preservation cover, including a device body and a heat preservation cover movably installed on the device body,

[0010] The device body includes a base and a closed small door. The two sides of the base are movably connected to the closed small door. A saddle is installed on the top of the base, and a steel coil is placed on the saddle movably. Both sides of the bottom of the saddle are connected with support frames for supporting the heat preservation cover;

[0011] Driving devices and gravity spring composite driving devices are installed on both sides of the support frame. The driving device includes a first rack, a double gear structure, a second rack, a walking wheel, a guide rail and a guide wheel set. The first rack is driven and connected to the horizontal second rack through the double gear structure. The other end of the second rack is fixedly connected to the closed small door. A limiting guide wheel is installed between the inner sides of the first rack and the second rack;

[0012] The gravity spring composite drive device includes a spring, a counterweight, and a steel wire rope. One end of the steel wire rope is connected to the closing small door, and the other end of the steel wire rope passes through a guide wheel set and is connected to a counterweight. The outer side of the closing small door is hinged to a second rack; the first rack is movably connected to the spring.

[0013] Preferably, the traveling wheels include a first traveling wheel installed at the lower part of the closing small door and a second traveling wheel installed on the upper frame of the closing small door. The guide rails include a first guide rail installed under the closing small door and a second guide rail installed on the frame above the closing small door. There is a driving connection between the first traveling wheel and the first guide rail, and a driving connection between the second traveling wheel and the second guide rail.

[0014] Preferably, the double gear structure includes a first gear and a second gear. The first gear meshes with a vertically installed first rack, and the second gear of the double gear structure meshes with a horizontal second rack. The first gear and the second gear are drivingly connected to the vertically installed first rack; the second gear is drivingly connected to the horizontal second rack.

[0015] Preferably, the spring is installed in a limiting cavity vertically below the first rack, and the spring is freely connected to the first rack.

[0016] Preferably, the guide wheel set includes a first guide wheel, a second guide wheel, and a third guide wheel. The first guide wheel and the third guide wheel are arranged on the same horizontal plane. The first guide wheel is installed below the connection of the steel wire rope and the closing small door to guide one end of the steel wire rope. The second guide wheel is installed above the second rack and the steel wire rope. The third guide wheel is installed on the outer frame of the outer base of the closing small door. The other end of the steel wire rope passes below the second guide wheel and above the third guide wheel and is connected to the counterweight. There are 1 - 3 counterweights.

[0017] Preferably, a stop block for pressing the first rack is installed below the outer side of the heat preservation cover.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] 1. The design including the device body and the heat preservation cover movably installed on the device body can prevent heat loss on the outer side of the steel coil and keep the steel coil warm through the heat preservation cover during the use of the pallet truck.

[0020] 2. Using the gravity of the heat preservation cover as the power, under the action of the gravity of the heat preservation cover, through the cooperation of springs, counterweights, steel wire ropes, and gears or racks, the springs can be compressed, the counterweights can be lifted, and the closed small door can be closed; and by designing two kinds of power sources, springs and counterweights, as the driving force for opening the closed small door, the reliable opening of the closed small door is ensured, realizing the automatic control of the closed small door. After the heat preservation cover is placed, the sealing around the steel coil can be achieved, improving the heat preservation performance of the heat preservation cover. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a transmission device for a closed small door of a pallet truck for a heat preservation cover proposed by the present utility model;

[0022] Figure 2 It is a specific structural diagram of a transmission device for a closed small door of a pallet truck for a heat preservation cover proposed by the present utility model.

[0023] In the figure: 1 steel coil, 2 saddle, 3 heat preservation cover, 4 stop block, 5 first rack, 6 double gear structure, 601 first gear, 602 second gear, 7 second rack, 8 closed small door, 9 buffer spring, 10 counterweight, 11 steel wire rope, 12 walking wheel, 1201 first walking wheel, 1202 second walking wheel, 13 guide rail, 1301 first guide rail, 1302 second guide rail, 14 guide wheel set, 1401 first guide wheel, 1402 second guide wheel, 15 device body, 16 base, 17 limit cavity, 18 support frame, 19 limit guide wheel. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] Embodiment

[0026] Refer to Figure 1-2 , a transmission device for a closed small door of a pallet truck for a heat preservation cover, includes a device body 15 and a heat preservation cover 3 movably installed on the device body 15,

[0027] The device body includes a base 16 and a closed small door 8. The two sides of the base 16 are movably connected to the closed small door 8. A saddle 2 is installed on the top of the base 16. A steel coil 1 is movably placed on the top of the saddle 2. Both sides of the bottom of the saddle 2 are connected with support frames 18 for supporting the heat preservation cover 3;

[0028] On both sides of the support frame 18, a driving device and a gravity spring composite driving device are installed. The driving device includes a first rack 5, a double-gear structure 6, a second rack 7, a walking wheel 12, a guide rail 13, and a guide wheel set 14. The first rack 5 is drivingly connected to the horizontal second rack 7 through the double-gear structure 6. The other end of the second rack 7 is fixedly connected to the closing small door 8. A limiting guide wheel 19 is installed between the inner sides of the first rack 5 and the second rack 7. A stop block 4 for pressing the first rack 5 is installed below the outer side of the heat preservation cover 3. The gravity spring composite driving device includes a spring 9, a counterweight 10, and a steel wire rope 11. One end of the steel wire rope 11 is connected to the closing small door 8, and the other end of the steel wire rope 11 passes through the guide wheel set 14 and is connected to a counterweight 10. The outer side of the closing small door 8 is hingedly connected to the second rack 7. The first rack 5 is movably connected to the spring 9.

[0029] More specifically, the walking wheel 12 includes a first walking wheel 1201 installed at the lower part of the closing small door 8 and a second walking wheel 1202 installed on the upper frame of the closing small door 8. The guide rail 13 includes a first guide rail 1301 installed below the closing small door 8 and a second guide rail 1302 installed on the frame above the closing small door 8. A driving connection is established between the first walking wheel 1201 and the first guide rail 1301, and a driving connection is established between the second walking wheel 1202 and the second guide rail 1302.

[0030] Among them, the double-gear structure 6 includes a first gear 601 and a second gear 602. The first gear 601 meshes with the vertically installed first rack 5. The second gear 602 of the double-gear structure 19 meshes with the horizontal second rack 7. The first gear 601 and the second gear 602 are drivingly connected to the vertically installed first rack 5. The second gear 602 is drivingly connected to the horizontal second rack 7.

[0031] In this embodiment, the gravity spring composite driving device includes a spring 9, a counterweight 10, and a steel wire rope 11. One end of the steel wire rope 11 is connected to the closing small door 8, and the other end of the steel wire rope 11 passes through the guide wheel set 14 and is connected to a counterweight 10. The outer side of the closing small door 8 is hingedly connected to the second rack 7. The first rack 5 is movably connected to the spring 9.

[0032] More specifically, the spring 9 is installed in the limiting cavity 17 directly below the first rack 5. Among them, in the normal state of the spring 9, the closing small door 8 is in the open state.

[0033] Among them, the guide wheel set 14 includes a first guide wheel 1401, a second guide wheel 1402, and a third guide wheel 1403. The first guide wheel 1401 and the third guide wheel 1403 are arranged on the same horizontal plane. The first guide wheel 1401 is installed below the connection of the steel wire rope 11 and the small closing door 8 to guide one end of the steel wire rope 11. The second guide wheel 1402 is installed above the second rack 7 and the steel wire rope 11. The third guide wheel 1403 is installed on the outer frame of the outer base 16 of the small closing door 8. The other end of the steel wire rope 11 passes under the second guide wheel 1402 and above the third guide wheel 1403 and is connected to the counterweight 10. There are 1 - 3 counterweights 10 provided.

[0034] Working principle: During operation, the steel coil 1 is placed on the saddle 2 inside the lower part of the heat preservation cover 3. When the heat preservation cover 3 is lowered, the stopper 4 on the heat preservation cover 3 presses down on the first rack 5, and at the same time compresses the spring 9 at the lower part of the first rack 5. The first rack 5 drives the small gear (the first gear 601) of the double gear 6 to rotate. The large gear (the second guide wheel 602) of the double gear 6 drives the second rack 7 to move horizontally. The second rack 7 drives the small closing door 8 to move to the left, and the small closing door 8 closes. During this process, the counterweight 10 connected to the small closing door 8 by the steel wire rope 11 is lifted.

[0035] After the heat preservation is completed, during the process of lifting the heat preservation cover 3, the compressed spring 9 releases its resilience and pushes the first rack 5 to move upward. The first rack 5 drives the small gear of the double gear 6 to rotate. The rotation of the double gear 6 transmits the force to the second rack 7 and the small closing door 8 through the large gear. At the same time, the gravity of the lifted counterweight 10 acts on the small closing door 8 through the steel wire rope 11. Under the combined action of the resilience of the buffer spring 9 and the gravity of the counterweight 10, the traveling wheels 12 of the small closing door 8 move to the right on the guide rail 13, and the small closing door is opened.

[0036] The first guide wheel 1401 and the third guide wheel 1403 provide guidance for the steel wire rope; the second traveling wheel 1202 and the second guide wheel 1402 provide guidance for the second rack 7 and the small closing door 8; the first gear 601 and the second gear 602 provide guidance for the first rack 5.

[0037] In the above technical content, to achieve and ensure the low - temperature treatment effect of the heat preservation cover of the steel coil 1, the pallet truck is sealed and improved, and the small closing door 8 of the pallet truck is designed. The small closing door 8 has a two - door structure. When the heat preservation cover 3 covers the pallet truck to insulate the steel coil 1, the small closing door 8 closes towards each other. When the heat preservation cover 3 is removed, the small closing door 8 opens in both directions. Through this design, when the steel coil is subjected to low - temperature heat treatment in the heat preservation cover 3, a sealed space is provided for the steel coil 1 to improve the heat treatment effect; when the heat preservation cover 3 is lifted off, the small closing door opens, providing space for the lifting tool to lift the steel coil 1.

[0038] In this embodiment, the gravity of the heat preservation cover 3 is used as the power. Under the action of the gravity of the heat preservation cover 3, the spring 9 is compressed under the transmission action of the first rack 5, the double gear 6 and the second rack 7, and the counterweight 10 lifts the counterweight through the steel wire rope 11 and closes the closed small door 8. During the process of lifting the heat preservation cover, the resilience of the spring 9 and the gravity of the counterweight 10 are used as the driving forces to open the closed small door 8, ensuring the reliable opening of the closed small door 8 and realizing the automatic control of the opening and closing of the closed small door 8. This design can achieve the sealing around the steel coil 1 after placing the heat preservation cover 3 and improve the heat preservation performance of the heat preservation cover 3;

[0039] At the same time, a hinged structure is adopted between the second rack 7 and the closed small door 8, avoiding jamming caused by over-positioning between the rack 7 and the closed small door 8;

[0040] The first rack 5 and the second rack 7 are both designed with guide wheels for guiding. The double gear structure 6 guides the first rack 5, and the second traveling wheel 1202 and the second guide wheel 1402 guide the second rack 7, providing guarantee for the first rack 5 and the second rack 7 to keep walking in a straight line. The traveling guide rail of the closed small door 8 is designed as a cylinder, and the wheel rim of the traveling wheel is designed as a semi-circle, avoiding jamming caused by deformation of the closed small door 8.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 to the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat preservation cover for a pallet truck to close a small door transmission device, comprising a device body (15) and a heat preservation cover (3) movably mounted on the device body (15), characterized in that: The device body comprises a base (16) and a closed small door (8), the two sides of the base (16) are movably connected to the closed small door (8), a saddle (2) is installed on the top of the base (16), a steel coil (1) is movably placed on the top of the saddle (2), and support frames (18) supporting the heat insulation cover (3) are connected to both sides of the bottom of the saddle (2); A driving device and a gravity spring composite driving device are installed on both sides of the support frame (18), and the driving device comprises a first rack (5), a double gear structure (6), a second rack (7), a walking wheel (12), a guide rail (13) and a guide wheel group (14); the first rack (5) is drivingly connected to the horizontal second rack (7) through the double gear structure (6); the other end of the second rack (7) is fixedly connected to the closed small door (8); and a limited guide wheel (19) is installed between the inner sides of the first rack (5) and the second rack (7); The gravity spring composite drive device comprises a spring (9), a counterweight (10) and a steel wire rope (11); one end of the steel wire rope (11) is connected to the closed small door (8); the other end of the steel wire rope (11) passes through a guide wheel group (14) and is connected to the counterweight (10); the outer side of the closed small door (8) is hingedly connected to the second rack (7); and the first rack (5) is movably connected to the spring (9).

2. A transmission device for closing a small door of a heat preservation cover using a pallet truck according to claim 1, characterized in that: The running wheel (12) comprises a first running wheel (1201) installed at the lower part of the closed small door (8) and a second running wheel (1202) installed on the frame above the closed small door (8); the guide rail (13) comprises a first guide rail (1301) installed below the closed small door (8) and a second guide rail (1302) installed on the frame above the closed small door (8); the first running wheel (1201) is drivingly connected to the first guide rail (1301), and the second running wheel (1202) is drivingly connected to the second guide rail (1302).

3. A transmission device for closing a small door of a heat preservation cover using a pallet truck according to claim 1, characterized in that: The double gear structure (6) comprises a first gear (601) and a second gear (602), wherein the first gear (601) is engaged with a vertically mounted first rack (5), and the second gear (602) of the double gear structure (19) is engaged with a horizontal second rack (7), and the first gear (601) and the second gear (602) are drivingly connected to the vertically mounted first rack (5); and the second gear (602) is drivingly connected to the horizontal second rack (7).

4. A transmission device for closing a small door of a heat preservation cover using a pallet truck according to claim 1, characterized in that: The spring (9) is installed in a limiting cavity (17) vertically below the first rack (5), and the spring (9) is freely connected to the first rack (5).

5. The transmission device for closing a small door of a heat preservation cover using a pallet truck according to claim 1, characterized in that: The guide wheel group (14) comprises a first guide wheel (1401), a second guide wheel (1402) and a third guide wheel (1403). The first guide wheel (1401) and the third guide wheel (1403) are arranged on the same horizontal plane. The first guide wheel (1401) is installed below the connection between the steel wire rope (11) and the closed small door (8) to guide one end of the steel wire rope (11). The second guide wheel (1402) is installed above between the second rack (7) and the steel wire rope (11). The third guide wheel (1403) is installed on the outer frame of the outer base (16) of the closed small door (8). The other end of the steel wire rope (11) passes through the bottom of the second guide wheel (1402) and the top of the third guide wheel (1403) to be connected to the counterweight block (10). The counterweight block (10) is provided with 1-3 pieces.

6. A transmission device for closing a small door of a heat preservation cover using a pallet truck according to claim 1, characterized in that: A stopper (4) for pressing the first rack (5) is installed at the lower outer side of the heat-insulating cover (3).

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