High-speed acceleration box for electrically-driven test bench

Abstract

The utility model discloses a high-speed acceleration box for an electrically-driven test bench, which comprises a shell, a driving input shaft, a middle connecting shaft and a load output shaft are sequentially arranged in the shell, the driving input shaft is meshed with the middle connecting shaft, the middle connecting shaft is meshed with the load output shaft, and the load output shaft is meshed with the load output shaft. The two ends of the driving input bearing are rotationally connected with the shell through a left driving bearing and a right driving bearing respectively, the two ends of the middle connecting shaft are rotationally connected with the shell through a left middle bearing and a right middle bearing respectively, and the two ends of the load output shaft are rotationally connected with the shell through a left load bearing and a right load bearing respectively. The shell is provided with an access port, and the access port is communicated with an oil-gas lubricating port and a lubricating oil port which are communicated with the bearing; through the above mode, the test bench can meet the installation and test of electric drive products such as new energy passenger vehicle motors, speed reducers (left-arranged, right-arranged and coaxial), commercial vehicle parallel electric axles, commercial vehicle motors and the like, and guarantees the stability in a high-speed operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive testing, in particular to a high-speed speed increasing box used for an electric drive testing platform. Background Art

[0002] With the increasingly serious environmental pollution in the domestic automobile industry and the serious dependence on petroleum fuels, the research and development of electric-driven vehicles has attracted extensive attention from all over the world, especially the passenger car industry, due to their characteristics of no environmental pollution, high energy utilization rate, and good acceleration performance. Electric passenger cars use batteries as power sources and motors as drive devices. The quality of their structure directly affects the performance of the car drive, so it is necessary to build a test bench to perform performance analysis and life testing on the drive device.

[0003] In the past, the test bench structure in China was that the motor directly drove the test piece (high-speed motor). With the increase in technical requirements for new energy motors, motors with speeds of 25,000 rpm and higher have been developed, which means that the drive motor also needs to be able to reach a speed of at least 25,000 rpm. There are 25,000 rpm motors abroad, but they are more expensive and must also ensure operational stability during high-speed rotation tests. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a high-speed gearbox for an electric drive test bench, which can meet the installation and testing of electric drive products such as new energy passenger car motors, reducers (left-mounted, right-mounted, coaxial) and commercial vehicle parallel electric bridges, commercial vehicle motors, etc., and ensure stability during high-speed operation.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a high-speed gearbox for an electric drive test bench, comprising: a housing, in which a drive input shaft, an intermediate connecting shaft and a load output shaft are sequentially arranged, the drive input shaft is meshed with the intermediate connecting shaft, the intermediate connecting shaft is meshed with the load output shaft, the two ends of the drive input bearing are rotatably connected to the housing through a left drive bearing and a right drive bearing respectively, the two ends of the intermediate connecting shaft are rotatably connected to the housing through a left intermediate bearing and a right intermediate bearing respectively, and the two ends of the load output shaft are rotatably connected to the housing through a left load bearing and a right load bearing respectively;

[0006] The shell body is provided with an access port, which is connected with an oil-gas lubrication port connected with the bearing and an oil lubrication port connected with the drive input shaft, the intermediate connecting shaft and the load output shaft.

[0007] Preferably, the oil-gas lubrication port includes a first lubrication port, a second lubrication port, a third lubrication port, a fourth lubrication port, a fifth lubrication port and a sixth lubrication port, and the first lubrication port, the second lubrication port, the third lubrication port, the fourth lubrication port, the fifth lubrication port and the sixth lubrication port are respectively connected to the gaps of the left drive bearing, the right drive bearing, the left intermediate bearing, the right intermediate bearing, the left load bearing and the right load bearing through corresponding oil passages, so that the oil mist is sprayed at the corresponding bearing gaps.

[0008] Preferably, two ends of the drive input shaft are respectively connected with a left-mounted drive flange and a right-mounted drive flange.

[0009] Preferably, two ends of the load output shaft are respectively connected with a left load flange and a right load flange.

[0010] Preferably, an oil receiving groove is provided at the bottom of the shell.

[0011] Preferably, the left driving bearing and the right driving bearing as well as the left load bearing and the right load bearing are connected by an oil return pipe, and the oil return pipe is connected to the oil receiving tank.

[0012] Preferably, an oil extraction hole is provided at the bottom of the oil receiving tank.

[0013] Preferably, the left drive bearing, the right drive bearing, the left intermediate bearing, the right intermediate bearing, the left load bearing, and the right load bearing are ceramic bearings.

[0014] Preferably, an air inlet is provided on the shell, and a filter box is arranged at the air inlet.

[0015] Preferably, the plurality of access ports are commonly connected to the diverter block, and the oil-gas lubrication port and the oil lubrication port are both provided on the diverter block.

[0016] The beneficial effects of the utility model are:

[0017] 1. By controlling the speed ratio between the drive input shaft, the intermediate connecting shaft and the load output shaft, the speed of the load output shaft is increased, and the specimen is tested at a high speed;

[0018] 2. The lubricating oil reaches the gears of the drive input shaft, the intermediate connecting shaft and the load output shaft through the oil lubrication port for lubrication, maintaining the high-speed meshing between the shafts. The oil mist lubricates and dissipates heat for each bearing through the oil-gas lubrication port, maintaining the high-speed operation of the bearings. At the same time, the use of oil mist rather than lubricating oil to lubricate and dissipate heat for the bearings greatly reduces the resistance of the bearings during high-speed operation, thereby stably maintaining high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the positional relationship between the drive input shaft, the intermediate connecting shaft and the load output shaft of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the shunt block of the utility model.

[0022] The markings of the components in the accompanying drawings are as follows:

[0023] 1. Shell; 11. Access port; 12. Diverter block; 1211. First lubrication port; 1212. Second lubrication port; 1213. Third lubrication port; 1214. Fourth lubrication port; 1215. Fifth lubrication port; 1216. Sixth lubrication port;

[0024] 122, oil lubrication port; 123, air inlet;

[0025] 2. Drive input shaft; 21. Left drive bearing; 22. Right drive bearing; 23. Left drive flange; 24. Right drive flange;

[0026] 3. Middle connecting shaft; 31. Left middle bearing; 32. Right middle bearing;

[0027] 4. Load output shaft; 41. Left load bearing; 42. Right load bearing; 43. Left load flange; 44. Right load flange;

[0028] 5. Fixed seat;

[0029] 6. Oil return pipe. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0037] Example:

[0038] refer to Figure 1-Figure 3 A high-speed gearbox for an electric drive test bench comprises: a housing 1, in which a drive input shaft 2, an intermediate connecting shaft 3 and a load output shaft 4 are sequentially arranged, the drive input shaft 2 is meshed with the intermediate connecting shaft 3, and the intermediate connecting shaft 3 is meshed with the load output shaft 4, so that the speed of the load output shaft 4 is increased by controlling the speed ratio;

[0039] The two ends of the drive input shaft 2 are rotatably connected to the housing 1 through the left drive bearing 21 and the right drive bearing 22 respectively, the two ends of the intermediate connecting shaft 3 are rotatably connected to the housing 1 through the left intermediate bearing 31 and the right intermediate bearing 32 respectively, and the two ends of the load output shaft 4 are rotatably connected to the housing 1 through the left load bearing 41 and the right load bearing 42 respectively; a fixing seat 5 is bolted to the housing 1, and the left drive bearing 21, the right drive bearing 22, the left load bearing 41, and the right load bearing 42 are all installed in the corresponding fixing seats 5;

[0040] An access port 11 is provided on the housing 1, and the access port 11 is connected with an oil-gas lubrication port connected with the bearing and an oil lubrication port 122 connected with the drive input shaft 2, the intermediate connecting shaft 3, and the load output shaft 4. The multiple access ports 11 are commonly connected with the diverter block 12, and the oil-gas lubrication port and the oil lubrication port 122 are both provided on the diverter block 12, so that the oil mist enters the housing 1 through the oil-gas lubrication port and reaches the gaps of each bearing through the oil path, and the lubricating oil enters the housing 1 through the oil lubrication port 122 and reaches the gears of the drive input shaft 2, the intermediate connecting shaft 3, and the load output shaft 4 through the oil path.

[0041] refer to Figure 3The oil-gas lubrication port includes a first lubrication port 1211, a second lubrication port 1212, a third lubrication port 1213, a fourth lubrication port 1214, a fifth lubrication port 1215 and a sixth lubrication port 1216. The first lubrication port 1211, the second lubrication port 1212, the third lubrication port 1213, the fourth lubrication port 1214, the fifth lubrication port 1215 and the sixth lubrication port 1216 are respectively connected to the gaps of the left driving bearing 21, the right driving bearing 22, the left intermediate bearing 31, the right intermediate bearing 32, the left load bearing 41 and the right load bearing 42 through corresponding oil passages, so that the oil mist is sprayed at the corresponding bearing gaps, so that the oil mist enters the corresponding oil-gas lubrication port of the diverter block 12 through the designated access port 11 through an external device, and the oil mist reaches the corresponding bearing gap through the oil-gas lubrication port through the corresponding oil passage;

[0042] Similarly, the lubricating oil is introduced into the corresponding oil lubrication port 122 of the diverter block 12 through the designated access port 11 by an external device, and the lubricating oil passes through the oil lubrication port 122 through the corresponding oil path to the gears of the drive input shaft 2, the intermediate connecting shaft 3 and the load output shaft 4.

[0043] refer to Figure 1 and Figure 2 In order to facilitate the connection between the drive input shaft 2 and an external drive device, such as a motor, the two ends of the drive input shaft 2 are respectively bolted with a left drive flange 23 and a right drive flange 24, so that the motor can be connected to one end of the drive input shaft 2 through the flange on either side, thereby driving the drive input shaft 2 to rotate, thereby improving the convenience and adaptability of installation and testing.

[0044] refer to Figure 1 and Figure 2 In order to facilitate the connection between the test piece and the speed gearbox, the two ends of the load output shaft 4 are respectively connected with a left load flange 43 and a right load flange 44, so that the test piece can be connected to one end of the load output shaft 4 through the flange on either side, so that the load output shaft 4 drives the high-speed rotation of the test piece, thereby improving the convenience and adaptability of installation and testing.

[0045] refer to Figure 1 and Figure 2 In order to collect lubricating oil and oil mist, an oil receiving groove is provided at the bottom of the housing 1. The left driving bearing 21 and the right driving bearing 22 as well as the left load bearing 41 and the right load bearing 42 are connected with an oil return pipe 6, and the oil return pipe 6 is connected with the oil receiving groove. An oil outlet can be provided on the fixing seat 5, and then one end of the oil return pipe 6 is connected with the oil outlet and the other end is connected with the oil receiving groove, so that the lubricating oil and oil mist can be returned to the oil receiving groove. An oil extraction hole is provided at the bottom of the oil receiving groove, and finally the external lubrication station recycles the lubricating oil and oil mist through the oil extraction hole.

[0046] refer to Figure 1 and Figure 2 In order to improve the running accuracy and durability of the drive input shaft 2, the intermediate connecting shaft 3 and the load output shaft 4, the left drive bearing 21, the right drive bearing 22, the left intermediate bearing 31, the right intermediate bearing 32, the left load bearing 41 and the right load bearing 42 are precision ceramic bearings. The bearings have the characteristics of high temperature resistance, cold resistance, wear resistance, corrosion resistance, anti-magnetic insulation, less oil lubrication, high speed and low noise.

[0047] refer to Figure 1 and Figure 2 In order to balance the pressure inside the speed box and the external environment, an air inlet 123 is opened on the shell 1, and the air inlet 123 is connected to the inside of the speed box. A filter box is provided at the air inlet 123 to prevent foreign matter from entering the inside of the speed box.

[0048] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-speed gearbox for an electric drive test bench, It is characterized in that include: A housing (1), wherein a drive input shaft (2), an intermediate connecting shaft (3) and a load output shaft (4) are sequentially arranged in the housing (1); the drive input shaft (2) meshes with the intermediate connecting shaft (3), and the intermediate connecting shaft (3) meshes with the load output shaft (4); the two ends of the drive input shaft (2) are rotatably connected to the housing (1) via a left drive bearing (21) and a right drive bearing (22), respectively; the two ends of the intermediate connecting shaft (3) are rotatably connected to the housing (1) via a left intermediate bearing (31) and a right intermediate bearing (32), respectively; and the two ends of the load output shaft (4) are rotatably connected to the housing (1) via a left load bearing (41) and a right load bearing (42); The housing (1) is provided with an access port (11), the access port (11) being connected to an oil-gas lubrication port connected to the bearing and an oil lubrication port (122) connected to the drive input shaft (2), the intermediate connecting shaft (3), and the load output shaft (4).

2. A high-speed gearbox for an electric drive test bench according to claim 1, Features: The oil-gas lubrication port comprises a first lubrication port (1211), a second lubrication port (1212), a third lubrication port (1213), a fourth lubrication port (1214), a fifth lubrication port (1215) and a sixth lubrication port (1216). The first lubrication port (1211), the second lubrication port (1212), the third lubrication port (1213), the fourth lubrication port (1214), the fifth lubrication port (1215) and the sixth lubrication port (1216) are respectively connected to the gaps of the left driving bearing (21), the right driving bearing (22), the left intermediate bearing (31), the right intermediate bearing (32), the left load bearing (41) and the right load bearing (42) through corresponding oil passages, so that oil mist is sprayed at the corresponding bearing gaps.

3. A high-speed gearbox for an electric drive test bench according to claim 2, Features: The two ends of the drive input shaft (2) are respectively connected to a left-mounted drive flange (23) and a right-mounted drive flange (24).

4. A high-speed gearbox for an electric drive test bench according to claim 2, Features: The two ends of the load output shaft (4) are respectively connected to a left-positioned load flange (43) and a right-positioned load flange (44).

5. A high-speed gearbox for an electric drive test bench according to claim 2, Features: An oil receiving groove is provided at the bottom of the housing (1).

6. A high-speed gearbox for an electric drive test bench according to claim 5, Features: The left driving bearing (21) and the right driving bearing (22) as well as the left load bearing (41) and the right load bearing (42) are connected to an oil return pipe (6), and the oil return pipe (6) is connected to an oil receiving tank.

7. A high-speed gearbox for an electric drive test bench according to claim 5, Features: An oil extraction hole is provided at the bottom of the oil receiving groove.

8. A high-speed gearbox for an electric drive test bench according to claim 1, Features: The left driving bearing (21), the right driving bearing (22), the left intermediate bearing (31), the right intermediate bearing (32), the left load bearing (41), and the right load bearing (42) are ceramic bearings.

9. A high-speed gearbox for an electric drive test bench according to claim 1, Features: An air inlet (123) is provided on the shell (1), and a filter box is arranged at the air inlet (123).

10. A high-speed gearbox for an electric drive test bench according to claim 1, Features: The plurality of access ports (11) are in common communication with the diverter block (12), and the oil-gas lubrication port and the oil lubrication port (122) are both provided on the diverter block (12).

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