Electric drive assembly of electric balance forklift

Abstract

The utility model relates to the technical field of electric balance forklifts, and discloses an electric drive assembly of an electric balance forklift, which comprises a first shell, a second shell, a refrigeration component, a heat dissipation component and an oiling component, a motor is mounted in the first shell through a mounting frame, a second shell is arranged at one end of the first shell, a first shaft rod is rotationally connected into the second shell through a bearing, a pinion fixedly sleeves the outer side of the first shaft rod through a flat key, and a second shaft rod is rotationally connected into the portion, located on one side of the first shaft rod, of the second shell through a bearing. The outer side of the second shaft rod is fixedly sleeved with a large gear through a flat key. Cooling liquid is cooled through the metal side plates and the exhaust fan, then the cooling liquid is pumped into the snakelike water pipe through the liquid pump to circularly flow, a blowing fan blows cold air on the snakelike water pipe into the first shell to cool the motor, the cooling efficiency is high, lubricating oil can be poured into the second shell, abrasion of the small gear and the large gear is reduced, and the service life of the motor is prolonged. The method is suitable for wide popularization.

Description

Technical Field

[0001] This utility model relates to the field of electric counterbalance forklift technology, specifically to an electric drive assembly for an electric counterbalance forklift. Background Technology

[0002] Electric self-balancing forklifts, also known as electric self-balancing vehicles or two-way self-balancing heavy-duty vehicles, are electric transport vehicles with three or four wheels. They can balance the center of gravity of themselves and the goods, and have longitudinal and lateral stability, enabling them to load, unload and transport heavy objects in confined spaces.

[0003] The electric drive assembly is one of the core components of an electric counterbalance forklift, responsible for providing power and driving its operation. Existing electric drive assemblies for electric counterbalance forklifts have a simple structure, consisting of a housing containing the electric motor and gearbox. However, their heat dissipation is poor, and the electric motor can overheat during prolonged use, leading to malfunctions. Therefore, we propose an electric drive assembly for electric counterbalance forklifts. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an electric drive assembly for an electric balance forklift, solving the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] This utility model provides the following technical solution: an electric drive assembly for an electric balance forklift, comprising a first housing, a second housing, a refrigeration component, a heat dissipation component, and a refueling component;

[0008] An electric motor is mounted inside the first housing via a mounting bracket. A second housing is located at one end of the first housing. A first shaft is rotatably connected to the inside of the second housing via a bearing. A small gear is fixedly sleeved on the outside of the first shaft via a flat key. A second shaft is rotatably connected to the inside of the second housing located on one side of the first shaft via a bearing. A large gear is fixedly sleeved on the outside of the second shaft via a flat key. A first protective cover is bolted to the top of the first housing. A heat dissipation assembly is located on the top of the first protective cover. The heat dissipation assembly includes a second frame fixed to the top of the first protective cover via bolts. A serpentine water pipe is mounted inside the second frame via a mounting bracket. Fans are mounted at both ends of the second frame located at the top of the serpentine water pipe via mounting brackets. A cooling assembly is located on one side of the first housing. The cooling assembly includes a first box fixed to one side of the first housing via bolts. A metal side plate is welded inside the first box. Baffles are welded at equal intervals between the metal side plate and the first box. A liquid pump is mounted inside the first box located at one end of the metal side plate via a mounting bracket. Exhaust fans are mounted at both ends of the first box located at one end of the metal side plate via mounting brackets.

[0009] Furthermore, a second protective cover is fixed to the top of the second housing by bolts, and an oiling assembly is provided on the top of the second protective cover. The oiling assembly includes a structural ring welded to the top of the second protective cover, a filter screen is welded inside the structural ring located at the bottom of the second protective cover, and a sealing cover is connected to the top of the structural ring through a threaded groove.

[0010] Furthermore, a sealing sleeve is provided between the second housing and the first housing, the motor output shaft passes through the sealing sleeve and is fixedly connected to one end of the first shaft through a connecting sleeve, the small gear and the large gear mesh, and one end of the second shaft is located outside the second housing.

[0011] Furthermore, the outlet end of the serpentine water pipe is connected to the inside of the first housing, and the inlet end of the serpentine water pipe is fitted with a connecting hose, which is located on the outside of the second frame.

[0012] Furthermore, the top of the first box is connected to a connector via a threaded groove, the inlet of the liquid pump is connected to the inside of the metal side plate via a pipe, and the outlet of the liquid pump is connected to the bottom of the connector via a pipe.

[0013] Furthermore, a second dustproof net is fixed to the inside of the second frame located at the top of the blower by bolts, and a first dustproof net is fixed to one side of the first box by bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Coolant is poured between the metal side plate and the first housing. The metal side plate absorbs the heat of the coolant. The exhaust fan is turned on to extract the heat from the metal side plate, thus cooling the coolant. Multiple baffles can block the coolant, allowing the metal side plate to fully absorb the heat of the coolant. The pump is turned on to extract the coolant, which is then transported through the connecting hose to the serpentine water pipe. The blower is turned on to blow the low-temperature cold air from the serpentine water pipe into the first housing, cooling the motor inside the first housing. The coolant that enters the serpentine water pipe then flows through its other end to the space between the first housing and the metal side plate for further cooling before use.

[0016] Using the workpiece to open the sealing cover, lubricating oil can be added into the second housing through the structural ring and filter screen, allowing the pinion and gear to rotate in the lubricating oil, thus improving their rotational smoothness.

[0017] The electric drive assembly of this electric balance forklift cools the coolant through metal side plates and an exhaust fan. The coolant is then pumped into a serpentine water pipe for circulation. The fan blows the cool air from the serpentine water pipe into the first housing to cool the motor. The cooling efficiency is high, and lubricating oil can be poured into the second housing to reduce the wear of the pinion and gear. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the first and second housings of this utility model;

[0020] Figure 3 This is a schematic diagram of the refrigeration component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the heat dissipation component structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the refueling component structure of this utility model;

[0023] In the diagram: 1. First housing; 2. Second housing; 3. First protective cover; 4. Second protective cover; 5. Refrigeration component; 501. First box body; 502. Metal side plate; 503. Baffle; 504. Liquid pump; 505. Exhaust fan; 506. First dustproof net; 6. Heat dissipation component; 601. Second frame body; 602. Snake-shaped water pipe; 603. Blower fan; 604. Second dustproof net; 7. Oil filling component; 701. Structural ring; 702. Filter screen cover; 703. Sealing cover; 8. First shaft; 9. Second shaft; 10. Small gear; 11. Large gear; 12. Protective pad; 13. Connector; 14. Connecting hose; 15. Motor; 16. Sealing sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 In this embodiment of the utility model, it includes a first housing 1, a second housing 2, a cooling component 5, a heat dissipation component 6, and a refueling component 7;

[0026] An electric motor 15 is mounted inside the first housing 1 via a mounting bracket. A second housing 2 is located at one end of the first housing 1. A first shaft 8 is rotatably connected inside the second housing 2 via a bearing. A small gear 10 is fixedly fitted onto the outside of the first shaft 8 via a key. A second shaft 9 is rotatably connected inside the second housing 2 on one side of the first shaft 8 via a bearing. A large gear 11 is fixedly fitted onto the outside of the second shaft 9 via a key. A first protective cover 3 is bolted to the top of the first housing 1. A heat dissipation assembly 6 is located on the top of the first protective cover 3. The heat dissipation assembly 6 includes a second frame 601 bolted through and fixed to the top of the first protective cover 3. The second frame 601 contains a... The mounting bracket is equipped with a serpentine water pipe 602. The second frame 601 is located at the top of the serpentine water pipe 602. Both ends of the second frame 601 are equipped with fans 603 via the mounting bracket. A cooling component 5 is provided on one side of the first housing 1. The cooling component 5 includes a first box 501 fixed to one side of the first housing 1 by bolts. A metal side plate 502 is welded inside the first box 501. Baffles 503 are welded at equal intervals between the metal side plate 502 and the first box 501. A liquid pump 504 is installed inside the first box 501 at one end of the metal side plate 502 via the mounting bracket. Both ends of the first box 501 at one side of the metal side plate 502 are equipped with exhaust fans 505 via the mounting bracket.

[0027] The second housing 2 is bolted to the top of a second protective cover 4. The top of the second protective cover 4 is provided with an oiling component 7. The oiling component 7 includes a structural ring 701 welded to the top of the second protective cover 4. A filter screen 702 is welded to the inside of the structural ring 701 at the bottom of the second protective cover 4. A sealing cap 703 is connected to the top of the structural ring 701 through a threaded groove. Lubricating oil can be poured into the second housing 2 through the structural ring 701 and the filter screen 702. The filter screen 702 can filter impurities in the lubricating oil. The sealing cap 703 is used to seal the structural ring 701.

[0028] A sealing sleeve 16 is provided between the second housing 2 and the first housing 1. The output shaft of the motor 15 passes through the sealing sleeve 16 and is fixedly connected to one end of the first shaft 8 through a connecting sleeve. The pinion 10 and the gear 11 mesh with each other. One end of the second shaft 9 is located outside the second housing 2. The sealing sleeve 16 seals between the output shaft of the motor 15 and the first housing 1 and the second housing 2, which can prevent the lubricating oil in the second housing 2 from flowing into the first housing 1.

[0029] The outlet end of the serpentine water pipe 602 is connected to the inside of the first box 501, and the inlet end of the serpentine water pipe 602 is fitted with a connecting hose 14. The connecting hose 14 is located outside the second frame 601. The liquid pump 504 works to deliver coolant to the serpentine water pipe 602 through the connecting hose 14.

[0030] The first box 501 has a connector 13 connected to its top via a threaded groove. The inlet of the liquid pump 504 is connected to the inside of the metal side plate 502 via a pipe. The outlet of the liquid pump 504 is connected to the bottom of the connector 13 via a pipe. The coolant pumped out by the liquid pump 504 is delivered to the connecting hose 14 via the connector 13.

[0031] The second frame 601 is located inside the top of the blower 603 and is fixed with a second dustproof net 604 by bolts. The first box 501 is fixed with a first dustproof net 506 by bolts on one side. The second dustproof net 604 and the first dustproof net 506 can prevent dust from entering the second frame 601 and the first box 501.

[0032] The working principle of this utility model is as follows: The electric motor 15 converts electrical energy into mechanical energy, driving the small gear 10 on the outer side of the first shaft 8 to rotate. This, in turn, drives the second shaft 9 to rotate via the large gear 11, thus transmitting power to the forklift transmission system connected to the second shaft 9. Using a workpiece, the sealing cover 703 is opened, allowing lubricating oil to be added to the second housing 2 through the structural ring 701 and the filter screen 702. This causes the small gear 10 and large gear 11 to rotate within the lubricating oil, reducing wear on the small gear 10 and large gear 11. The operator then places the bottom end of the connecting hose 14 over the outside of the connector 13 and pours coolant between the metal side plate 502 and the first housing 501. The system absorbs heat from the coolant, and the exhaust fan 505 is turned on to extract the heat from the metal side plate 502, thereby cooling the coolant. Multiple baffles 503 can block the coolant, allowing the metal side plate 502 to fully absorb the heat from the coolant. The pump 504 is turned on to extract the coolant, which is then transported to the serpentine water pipe 602 via the connecting hose 14. The blower fan 603 blows the low-temperature air from the serpentine water pipe 602 into the first housing 1, cooling the motor 15 inside the first housing 1. The cooling efficiency is high. The coolant entering the serpentine water pipe 602 then flows through its other end to the space between the first housing 501 and the metal side plate 502 for further cooling before use.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electric drive assembly for an electric counterbalance forklift, comprising a first housing (1), a second housing (2), a cooling assembly (5), a heat dissipation assembly (6), and a refueling assembly (7). Its features are: An electric motor (15) is mounted inside the first housing (1) via a mounting bracket. A second housing (2) is provided at one end of the first housing (1). A first shaft (8) is rotatably connected inside the second housing (2) via a bearing. A small gear (10) is fixedly sleeved on the outside of the first shaft (8) via a flat key. A second shaft (9) is rotatably connected inside the second housing (2) on one side of the first shaft (8) via a bearing. A large gear (11) is fixedly sleeved on the outside of the second shaft (9) via a flat key. A first protective cover (3) is fixed to the top of the first housing (1) via bolts. A heat dissipation assembly (6) is provided on the top of the first protective cover (3). The heat dissipation assembly (6) includes a second frame (601) fixed to the top of the first protective cover (3) via bolts. A serpentine water pipe (602) is installed inside the first housing (1) via a mounting bracket. Fans (603) are installed at both ends of the second frame (601) at the top of the serpentine water pipe (602) via mounting brackets. A cooling component (5) is provided on one side of the first housing (1). The cooling component (5) includes a first box (501) fixed to one side of the first housing (1) by bolts. A metal side plate (502) is welded inside the first box (501). A baffle (503) is welded at equal intervals between the metal side plate (502) and the first box (501). A liquid pump (504) is installed inside the first box (501) at one end of the metal side plate (502) via a mounting bracket. Exhaust fans (505) are installed at both ends of the first box (501) at one side of the metal side plate (502) via mounting brackets.

2. The electric drive assembly of an electric counterbalance forklift according to claim 1, characterized in that: The second housing (2) is fixed to the top of the second protective cover (4) by bolts. The top of the second protective cover (4) is provided with a refueling component (7). The refueling component (7) includes a structural ring (701) welded to the top of the second protective cover (4). The structural ring (701) is located inside the bottom of the second protective cover (4) and a filter screen (702) is welded thereon. The top of the structural ring (701) is connected to a sealing cap (703) through a threaded groove.

3. The electric drive assembly of an electric counterbalance forklift according to claim 1, characterized in that: A sealing sleeve (16) is provided between the second housing (2) and the first housing (1). The output shaft of the motor (15) passes through the sealing sleeve (16) and is fixedly connected to one end of the first shaft (8) through the connecting sleeve. The small gear (10) and the large gear (11) mesh with each other. One end of the second shaft (9) is located outside the second housing (2).

4. The electric drive assembly of an electric counterbalance forklift according to claim 1, characterized in that: The outlet end of the serpentine water pipe (602) is connected to the inside of the first box (501), and the inlet end of the serpentine water pipe (602) is fitted with a connecting hose (14), which is located outside the second frame (601).

5. The electric drive assembly of an electric counterbalance forklift according to claim 1, characterized in that: The top of the first box body (501) is connected to a connector (13) through a threaded groove. The water inlet of the liquid pump (504) is connected to the inside of the metal side plate (502) through a pipe. The water outlet of the liquid pump (504) is connected to the bottom of the connector (13) through a pipe.

6. The electric drive assembly of an electric counterbalance forklift according to claim 1, characterized in that: The second frame (601) is located inside the top of the blower (603) and is fixed with a second dustproof net (604) by bolts. The first box (501) is fixed with a first dustproof net (506) on one side by bolts.

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