Driving box body of electric forklift

Abstract

The utility model provides a driving box body of an electric forklift, and belongs to the technical field of electric forklifts. The problem that connection between an existing driving box body and a main shell is not stable is solved. According to the driving box body of the electric forklift, the electric forklift comprises a main shell, the driving box body comprises a motor shell and a motor main shaft arranged on the motor shell in a penetrating mode, a driving shaft capable of driving a gear assembly to rotate is rotationally connected into the main shell, the motor main shaft is connected with the driving shaft through a spline, and a positioning concave cavity sunken in the axial direction is formed in the main shell; the outer side wall of the motor shell protrudes outwards in the radial direction to form annular heat dissipation ribs and a connecting column arranged in the axial direction, one end of the motor shell is embedded into the positioning cavity, the heat dissipation ribs and the connecting column abut against the end face of the main shell, and the connecting column is fixedly connected with the main shell through a fastener. According to the driving box body of the electric forklift, the motor shell is connected with the main shell in an inserting mode, so that the connecting stability of the motor shell is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric forklifts and relates to a driving box body of an electric forklift. Background Art

[0002] Electric forklifts are commonly used factory transportation tools. They are various wheeled transport vehicles that can load and unload, stack and transport palletized goods over short distances. Therefore, they are widely used in ports, stations, airports, factory workshops, warehouses, circulation centers and distribution centers. At present, the drive device of electric forklifts is usually installed as a whole, and the gear box and motor are connected through the central axis and cannot be separated. After long-term use, the motor is prone to failure. When a failure occurs and needs to be repaired and replaced, it needs to be disassembled as a whole. The gear box structure inside the motor is very complicated, and the gear box needs to be reinstalled after the fault is eliminated, making the overall maintenance and replacement inconvenient.

[0003] In view of the above problems, people have developed a Chinese patent application [Authorization Announcement No.: CN210313365U] which discloses a drive box for an electric forklift, including a box body and a box cover. The box body is provided with wheels, a ring gear, a motor connector, a drive motor, a primary transmission shaft and a secondary transmission shaft. The drive motor and the primary transmission shaft are separated into two parts, and the torque is transmitted through a spline connection. The motor connector and the drive motor adopt a split structure and are concentrically positioned through a stop.

[0004] The above structure is provided with a motor socket, and the motor and the motor socket are directly connected by bolts, thereby realizing a split connection, which is convenient for replacement and disassembly. However, due to the high precision requirements inside the motor, the end of the motor housing is directly abutted against the end of the motor socket to achieve connection, so that when in use, the motor vibrates, which can easily cause the connecting bolts to be displaced, affecting the stability of the connection between the primary transmission shaft and the drive motor. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems in the prior art and propose a drive box for an electric forklift. The technical problem to be solved by the utility model is: how to improve the stability of the connection between the drive box and the main shell.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A drive box of an electric forklift, the electric forklift includes a main shell, the drive box includes a motor shell and a motor spindle inserted into the motor shell, a drive shaft that can drive a gear assembly to rotate is rotatably connected in the main shell, the motor spindle and the drive shaft are connected by a spline, and is characterized in that an axially recessed positioning cavity is provided on the main shell, an annular heat dissipation rib and an axially arranged connecting column are formed on the outer side wall of the motor shell, one end of the motor shell is embedded in the positioning cavity and the heat dissipation rib and the connecting column are both against the end face of the main shell, and the connecting column is fixedly connected to the main shell by a fastener.

[0008] Working principle: A driving shaft for driving the gear assembly is arranged in the main housing, and a motor main shaft is arranged in the motor housing. The motor main shaft is spline-connected with the driving shaft, so that when the motor is repaired, the motor main shaft in the motor housing can be directly separated from the driving shaft, and other components of the main housing do not need to be taken out, making the maintenance of the drive box convenient, and the main housing is recessed axially to form a positioning cavity, at which time the motor housing can be partially embedded in the positioning cavity, and the outer wall of the motor housing is radially protruded outward to form an annular heat dissipation rib, so that the motor housing can be partially embedded in the positioning cavity through heat dissipation. The ribs abut against the end faces of the main housing to achieve preliminary positioning of the motor housing, and then an axially arranged connecting column is provided on the outer side wall of the motor housing, and the connecting column of the motor housing is fixedly connected to the main housing through fasteners, thereby achieving connection between the motor housing and the main housing. By providing positioning concave cavities and heat dissipation ribs, the motor housing and the main housing can be pre-positioned during installation, and then the connecting column and the main housing are fixedly connected through fasteners. By connecting the motor housing to the main housing in a plug-in manner, the connection between the motor housing and the main housing is convenient, and the stability of the connection of the motor housing is also improved.

[0009] In the above-mentioned driving box of the electric forklift, there are multiple heat dissipation ribs, which are spaced apart along the axial direction of the motor shell, one of the heat dissipation ribs close to the main shell abuts against the end face of the main shell, and the connecting column is integrally connected to the heat dissipation rib.

[0010] The setting of the heat dissipation ribs can not only strengthen the strength of the motor casing, but also play a role in heat dissipation. One of the heat dissipation ribs close to the main casing can also play a positioning role, and the connecting column and the heat dissipation rib are integrally formed, which can strengthen the strength of the motor casing while improving the stability of the installation of the motor casing.

[0011] In the above-mentioned driving box of the electric forklift, the motor housing includes a cylindrical limiting cylinder, and the heat dissipation ribs and the connecting column are respectively arranged on the outer side wall of one end of the limiting cylinder and are integrally formed with the limiting cylinder.

[0012] The setting of the limiting cylinder allows the motor housing to be inserted into the main housing more quickly, thereby improving the stability of the motor housing connection. The one-piece forming of the heat dissipation ribs and the connecting column enhances the strength of the motor housing itself, further improving the stability of the drive housing.

[0013] In the above-mentioned driving box of the electric forklift, one end of the limiting cylinder is embedded in the main positioning cavity and the outer side wall of the limiting cylinder is close to the side wall of the positioning cavity.

[0014] The setting of the limiting cylinder and the positioning cavity ensures that the limiting cylinder does not contact the side wall of the positioning cavity. The motor housing and the main housing are connected and pressed by connecting columns and fasteners, so that the limiting cylinder and the positioning cavity only cooperate for pre-positioning, which can improve the convenience of installation.

[0015] In the above-mentioned driving box of the electric forklift, one of the heat dissipation ribs is in contact with the end surface of the main shell, and the thickness of the heat dissipation rib is greater than the thickness of the other heat dissipation ribs.

[0016] The thickness of the heat dissipation ribs is set so that the heat dissipation ribs close to the main shell have higher strength and can be stably pressed on the main shell by fasteners, thereby improving the stability of the connection.

[0017] In the above-mentioned drive box of the electric forklift, the motor housing also includes a motor end cover, which protrudes along the axial direction to form an annular positioning ring, the positioning ring is embedded in the limiting cylinder and the end face of the motor end cover abuts against the end face of the limiting cylinder, the connecting columns are provided with connecting holes for fasteners to pass through, and the motor end cover is provided with positioning holes that are arranged one-to-one with the connecting holes and are connected to the corresponding connecting holes.

[0018] The arrangement of the motor end cover makes the installation of the motor main shaft in the motor housing more convenient, and the end cover shell relies on the connection between the limit cylinder and the main housing to press the motor end cover onto the limit cylinder at the same time, and the fastener realizes the connection of the three at the same time, making the connection more convenient and quick.

[0019] Compared with the prior art, the drive box of the electric forklift has the following advantages: the connecting column of the motor housing is fixedly connected to the main housing by fasteners, thereby realizing the connection between the motor housing and the main housing; by setting the positioning cavity and the heat dissipation ribs, the motor housing and the main housing can be pre-positioned during installation, and then the connecting column and the main housing can be fixedly connected by fasteners; by connecting the motor housing to the main housing by plugging, the connection between the motor housing and the main housing is convenient, and the stability of the connection of the motor housing is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2It is a top view of the utility model.

[0022] Figure 3 yes Figure 2 Sectional view of AA.

[0023] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0024] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0025] Figure 6 It is an exploded view of the motor housing in the utility model.

[0026] In the figure, 1, main housing; 11, driving shaft; 12, positioning cavity; 2, gear assembly; 3, motor housing; 31, heat dissipation rib; 32, connecting column; 32a, connecting hole; 33, limiting cylinder; 34, motor end cover; 34a, positioning ring; 34b, positioning hole; 4, motor main shaft; 5, spline; 6, fastener. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] like Figure 1 As shown, the drive box of the electric forklift comprises a main housing 1, the drive box comprises a motor housing 3 and a motor main shaft 4 passing through the motor housing 3, a drive shaft 11 which can drive the gear assembly 2 to rotate is rotatably connected in the main housing 1, and the motor main shaft 4 is connected to the drive shaft 11 via a spline 5.

[0029] Specifically, Figure 1-6 As shown, the main shell 1 is provided with an axially recessed positioning cavity 12, the outer wall of the motor shell 3 protrudes radially outward to form an annular heat dissipation rib 31 and an axially arranged connecting column 32, one end of the motor shell 3 is embedded in the positioning cavity 12 and the heat dissipation rib 31 and the connecting column 32 are both abutted against the end face of the main shell 1, and the connecting column 32 is fixedly connected to the main shell 1 by a fastener 6.

[0030] Working principle: A driving shaft 11 for driving the gear assembly 2 to rotate is arranged in the main housing 1, and a motor main shaft 4 is arranged in the motor housing 3. The motor main shaft 4 is connected to the driving shaft 11 by a spline 5, so that when the motor is repaired, the motor main shaft 4 in the motor housing 3 can be directly separated from the driving shaft 11, and there is no need to take out other components of the main housing 1, so that the maintenance of the drive box is convenient, and the main housing 1 is axially recessed to form a positioning cavity 12, at this time, the motor housing 3 can be partially embedded in the positioning cavity 12, and the outer wall of the motor housing 3 is radially protruded outward to form an annular heat dissipation rib 31, so that the motor housing 3 is partially embedded in the positioning cavity 12 through the heat dissipation rib 31 abuts against the end face of the main housing 1 to achieve preliminary positioning of the motor housing 3, and then an axially arranged connecting column 32 is provided on the outer side wall of the motor housing 3, and the connecting column 32 of the motor housing 3 is fixedly connected to the main housing 1 through the fastener 6, thereby realizing the connection between the motor housing 3 and the main housing 1. By setting the positioning cavity 12 and the heat dissipation rib 31, the motor housing 3 and the main housing 1 can be pre-positioned during installation, and then the connecting column 32 and the main housing 1 are fixedly connected through the fastener 6. By connecting the motor housing 3 to the main housing 1 in a plug-in manner, the connection between the motor housing 3 and the main housing 1 is convenient, and the stability of the connection of the motor housing 3 is also improved.

[0031] like Figure 1 , Figure 3 and Figure 4 As shown, a plurality of heat dissipation ribs 31 are provided, and the plurality of heat dissipation ribs 31 are distributed at intervals along the axial direction of the motor housing 3. One of the heat dissipation ribs 31 close to the main housing 1 abuts against the end face of the main housing 1. The connecting column 32 is integrally connected to the heat dissipation rib 31. One of the heat dissipation ribs 31 abuts against the end face of the main housing 1, and the thickness of the heat dissipation rib 31 is greater than that of the other heat dissipation ribs 31.

[0032] like Figure 1 and Figure 6 As shown, the motor housing 3 includes a cylindrical limiting cylinder 33, the heat dissipation ribs 31 and the connecting column 32 are respectively arranged on the outer wall of one end of the limiting cylinder 33 and are integrally formed with the limiting cylinder 33, one end of the limiting cylinder 33 is embedded in the main positioning cavity 12 and the outer wall of the limiting cylinder 33 is close to the side wall of the positioning cavity 12.

[0033] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, the motor housing 3 also includes a motor end cover 34, which protrudes axially to form an annular positioning ring 34a, the positioning ring 34a is embedded in the limiting cylinder 33 and the end surface of the motor end cover 34 abuts against the end surface of the limiting cylinder 33, and the connecting columns 32 are provided with connecting holes 32a for the fasteners 6 to pass through, and the motor end cover 34 is provided with positioning holes 34b that are arranged one-to-one with the connecting holes 32a and are connected to the corresponding connecting holes 32a.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A drive housing of an electric forklift, the electric forklift comprising a main housing (1), the drive housing comprising a motor housing (3) and a motor main shaft (4) passing through the motor housing (3), a drive shaft (11) rotatably connected in the main housing (1) and capable of driving a gear assembly (2) to rotate, the motor main shaft (4) and the drive shaft (11) being connected via a spline (5), characterized in that: The main housing (1) is provided with a positioning cavity (12) which is recessed in the axial direction. The outer wall of the motor housing (3) protrudes radially outward to form an annular heat dissipation rib (31) and an axially arranged connecting column (32). One end of the motor housing (3) is embedded in the positioning cavity (12) and the heat dissipation rib (31) and the connecting column (32) are both in contact with the end surface of the main housing (1). The connecting column (32) is fixedly connected to the main housing (1) via a fastener (6).

2. The driving box of the electric forklift according to claim 1, characterized in that: A plurality of heat dissipation ribs (31) are provided, and the plurality of heat dissipation ribs (31) are spaced apart along the axial direction of the motor housing (3), one of the heat dissipation ribs (31) close to the main housing (1) abuts against the end surface of the main housing (1), and the connection column (32) is integrally formed and connected to the heat dissipation rib (31).

3. The driving box of the electric forklift according to claim 1 or 2, characterized in that: The motor housing (3) comprises a cylindrical limiting cylinder (33), and the heat dissipation ribs (31) and the connecting column (32) are respectively arranged on the outer side wall of one end of the limiting cylinder (33) and are integrally formed with the limiting cylinder (33).

4. The driving box of the electric forklift according to claim 3, characterized in that: One end of the limiting cylinder (33) is embedded in the main positioning cavity (12), and the outer side wall of the limiting cylinder (33) is close to the side wall of the positioning cavity (12).

5. The driving box of the electric forklift according to claim 2, characterized in that: One of the heat dissipation ribs (31) abuts against the end surface of the main housing (1), and the thickness of the heat dissipation rib (31) is greater than the thickness of the other heat dissipation ribs (31).

6. The driving box of the electric forklift according to claim 3, characterized in that: The motor housing (3) further comprises a motor end cover (34), the motor end cover (34) protrudes along the axial direction to form an annular positioning ring (34a), the positioning ring (34a) is embedded in the limiting cylinder (33) and the end surface of the motor end cover (34) abuts against the end surface of the limiting cylinder (33), the connecting columns (32) are provided with connecting holes (32a) for fasteners (6) to pass through, and the motor end cover (34) is provided with positioning holes (34b) which are arranged one-to-one with the connecting holes (32a) and are connected to the corresponding connecting holes (32a).

Images