Permanent magnet synchronous motor for electric forklift

Abstract

The utility model discloses a permanent magnet synchronous motor for an electric forklift, which relates to the field of permanent magnet motors for electric forklifts and comprises a stator assembly composed of a stator core and a winding. The rotor assembly is composed of a rotor iron core, a permanent magnet, a rotating shaft and a rotor pressing plate; an air gap is arranged between the stator assembly and the rotor assembly, and the stator assembly is connected with the rotor assembly through a front bearing, a rear bearing, a front end cover and a rear end cover. The front end cover and the rear end cover are provided with the mounting bases and the fixing screw holes, so that the permanent magnet synchronous motor is fixed on the forklift. A plurality of radiating fins are arranged on the casing, so that the radiating capability of the motor is improved. The permanent magnet motor of the electric forklift adopts a distributed winding, such as a 48-slot 8-pole motor; rotor magnetic steel is arranged in a V-shaped manner, so that the reluctance torque is improved, and the air gap flux density is improved; the shell is made of an aluminum alloy material, and a plurality of radiating fins are arranged on the surface of the shell, so that light weight can be realized, and radiating is facilitated; and the mounting base and the shell are integrally designed.

Description

Technical Field

[0001] The utility model relates to the field of permanent magnet motors for electric forklifts, in particular to a permanent magnet synchronous motor for electric forklifts. Background Art

[0002] Electric forklifts are electric-powered industrial transport vehicles widely used in warehouses, workshops, logistics centers, and other locations for loading, unloading, stacking, and short-distance transportation of goods. The following are some of the key features and advantages of electric forklifts: Electric forklifts are battery-powered, emission-free, and environmentally friendly, making them particularly suitable for indoor use. They offer high energy conversion efficiency and relatively low operating costs, with electricity typically being cheaper than fuel. They are also quieter during operation, contributing to a better working environment.

[0003] Permanent magnet synchronous motors (PMSMs) for electric forklifts are high-performance electric motors widely used in industrial equipment such as electric forklifts. Due to their high operating efficiency, PMSMs can more effectively convert electrical energy into mechanical energy, reducing energy consumption. Therefore, PMSMs have become the core power components within electric forklifts.

[0004] Currently, electric forklift travel and oil pump motors require more energy-efficient, higher power density, and lighter motors. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a permanent magnet synchronous motor for electric forklifts to solve the current technical problem of needing a more energy-efficient, higher power density and lighter motor for electric forklift travel and oil pump motors.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A permanent magnet synchronous motor for an electric forklift includes a stator assembly consisting of a stator core and windings; and a rotor assembly consisting of a rotor core, permanent magnets, a rotating shaft, and a rotor pressure plate. An air gap is provided between the stator assembly and the rotor assembly, and the stator assembly is connected to the rotor assembly via front / rear bearings, a front cover, and a rear cover.

[0008] As a preferred technical solution of the present invention, a mounting base is respectively provided at the bottom of the front end cover and the bottom of the rear end cover.

[0009] As a preferred technical solution of the present invention, a fixing screw hole is provided at the bottom end of each mounting base.

[0010] As a preferred technical solution of the present invention, a plurality of heat dissipation fins are provided on the top surface of the housing.

[0011] The utility model has a mounting base and fixing screw holes on the front and rear end covers to fix the permanent magnet synchronous motor to the forklift. The housing has a number of heat dissipation fins to improve the heat dissipation capacity of the motor. The electric forklift permanent magnet motor adopts distributed winding, such as a 48-slot 8-pole motor; the rotor magnet steel adopts a V-arrangement (see the attached manual). Figure 4 ) Increase the reluctance torque and improve the air gap flux density; the casing is made of aluminum alloy, and a number of heat dissipation fins are arranged on the surface to achieve lightweight and help heat dissipation; the mounting base and casing are integrated into the design.

[0012] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front cross-sectional structural diagram of a permanent magnet synchronous motor for an electric forklift according to the present invention;

[0014] Figure 2 This is a front view schematic diagram of the appearance structure of the permanent magnet synchronous motor for electric forklifts of the utility model;

[0015] Figure 3 This is a schematic diagram of the appearance of a three-dimensional structure of a permanent magnet synchronous motor for an electric forklift of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of the rotor magnetic steel of the utility model using a V-arrangement;

[0017] In the figure: front cover 2, housing 3, stator assembly 4, rotor assembly 5, rear cover 6, encoder 7, mounting base 8 and fixing screw holes 9, heat dissipation fins 10. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0022] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted. Example 1

[0023] See also Figure 1-4 The present invention provides a technical solution: a permanent magnet synchronous motor for electric forklifts, comprising a stator assembly 4 consisting of a stator core and windings; and a rotor assembly consisting of a rotor core, permanent magnets, a rotating shaft, and a rotor pressure plate; an air gap is provided between the stator assembly and the rotor assembly, and the stator assembly is connected to the rotor assembly 5 via front / rear bearings, a front cover 2, and a rear cover 6. The electric forklift permanent magnet motor uses distributed windings, such as a 48-slot 8-pole motor, and the rotor magnets use a V-arrangement to increase the reluctance torque and improve the air gap magnetic field.

[0024] The bottom of the front cover 2 and the bottom of the rear cover 6 are each provided with a mounting base 8. A fixing screw hole 9 is opened at the bottom of each mounting base 8, so that the permanent magnet synchronous motor is fixed on the forklift to provide walking power or oil pump power to the electric forklift.

[0025] The top surface of the housing 3 is provided with a number of heat dissipation fins 10, which can achieve lightweight and help dissipate heat; the mounting base and the housing are designed to be integrated.

[0026] Encoder 7 is used to monitor the rotor speed, number of revolutions and running time. Encoder 7 is a prior art and will not be elaborated in detail in this embodiment. Any electronic component of this type in the prior art can be used as a replacement for the electronic component of this application as long as it can achieve the technical effects described in the specification of this application.

[0027] The utility model has a mounting base and fixing screw holes on the front and rear end covers to fix the permanent magnet synchronous motor to the forklift. The housing has a number of heat dissipation fins to improve the heat dissipation capacity of the motor. The electric forklift permanent magnet motor adopts distributed winding, such as a 48-slot 8-pole motor; the rotor magnet steel adopts a V-arrangement (see the attached manual). Figure 4 ) Increase the reluctance torque and improve the air gap flux density; the casing is made of aluminum alloy, and a number of heat dissipation fins are arranged on the surface to achieve lightweight and help heat dissipation; the mounting base and casing are integrated into the design.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A permanent magnet synchronous motor for an electric forklift, characterized in that: The invention comprises a stator assembly (4) consisting of a stator core and a winding; and a rotor assembly consisting of a rotor core, a permanent magnet, a rotating shaft, and a rotor pressure plate; an air gap is provided between the stator assembly and the rotor assembly, and the stator assembly is connected to the rotor assembly (5) via front / rear bearings, a front end cover (2), and a rear end cover (6).

2. The permanent magnet synchronous motor for an electric forklift according to claim 1, characterized in that: The bottom of the front end cover (2) and the bottom of the rear end cover (6) are each provided with a mounting base (8).

3. The permanent magnet synchronous motor for an electric forklift according to claim 2, characterized in that: A fixing screw hole (9) is provided at the bottom end of each mounting base (8).

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