Heavy machinery transmission automatic gear selection and shift test device

Abstract

The present invention discloses an automatic gear selection and shifting test device for a heavy-duty machinery gearbox, comprising a control computer, a column, a gear selection and shifting actuator, and a sliding guide rail. During testing, the load motor and the loading motor are started to simulate the driving condition of the entire vehicle. When it is detected that the gearbox to be tested meets the gear shifting timing, the control computer issues a gear selection and shifting instruction to the gear selection and shifting actuator to perform the gear selection and shifting action, while simultaneously recording the driving speed, gear selection stroke, gear shifting stroke, gear selection force, and gear shifting force under the gear selection and shifting action. Computer program control replaces manual gear selection and shifting, and the gear selection and shifting test can be continuously carried out day and night for various working condition tests, shortening the test cycle. At the same time, the computer records the data, avoiding the subjectivity of the operator, and the data is true and reliable, which is more valuable for reference in gearbox adjustment.

Description

Technical Field

[0001] The invention relates to an automatic gear selection and shifting testing device for a heavy-duty mechanical gearbox. Background Art

[0002] The shift mechanism is the core part of a mechanical gearbox. Whether the gearbox shift mechanism is properly installed or not is directly related to the portability and reliability of the entire machine during use, and is also of great significance to improving the ride comfort of the vehicle.

[0003] The gearbox selection and shift test process is as follows: start the loading motor and the load motor to simulate the vehicle driving condition, and the operator manually turns the gear selection shaft to perform the gearbox selection and shift test.

[0004] Taking into account the numerous test conditions, long duration, and frequent data recording, as well as the operator's muscle fatigue after prolonged gear selection and shifting operations (during the test, the heavy machinery transmission's gear selection and shifting force was approximately 390N, and the shifting torque was approximately 35N·m), the control accuracy of the gear selection and shifting timing during the test decreased, resulting in inaccurate test results for gear selection and shifting force, etc., so manual operation is far from meeting the requirements of gearbox selection and shifting tests.

[0005] Based on this, it is urgent to design a heavy-duty transmission automatic gear selection and shifting test device. Summary of the Invention

[0006] The purpose of the present invention is to provide a heavy-duty machinery gearbox automatic gear selection and shifting test device to solve the problems existing in the prior art.

[0007] The technical solution adopted to achieve the purpose of the present invention is as follows: a heavy machinery gearbox automatic shifting test device includes a control computer, a column, a shifting actuator and a sliding guide rail.

[0008] The lower end of the column is slidably connected to a horizontal sliding guide rail, the control computer is fixed on the column, and the gear selection and shifting actuator is slidably connected to the column, and the sliding direction is vertical.

[0009] The gear selection and shifting actuator comprises a gear shifting structure, a position selection structure and a slide plate, wherein the slide plate is slidably connected to the vertical track of the column.

[0010] The shift structure includes a connecting frame, a pull rod, a shift connecting rod and a shift cylinder. The shift cylinder is fixed on a vertical slide through the connecting frame and the output end is vertically downward. The output end of the shift cylinder is connected to the pull rod. The lower end of the pull rod is connected to the shift connecting rod and a pressure sensor is provided at the connection between the two. The shift connecting rod is connected to the shift pull arm, and the shift pull arm is connected to the shift shaft of the gearbox and an angle sensor is provided at the connection between the two.

[0011] The position selection structure includes a servo motor I, a screw rod I, a slide, a shift rod, a shift fork, a position selection connecting rod and a position selection cylinder.

[0012] The servo motor I is fixed to the slide via a motor base. The output end of the servo motor I is connected to a horizontal screw rod I. A nut is screwed onto the screw rod I. The slide is connected to the nut and slidably connected to the slide. The selector cylinder is fixed to the slide. The output end of the selector cylinder faces downward and is connected to a horizontal shift rod. The shift fork is connected to the shift rod. A displacement sensor is mounted on the selector connecting rod. One end of the selector connecting rod is connected to the gearshift shaft of the transmission, and the other end is clamped to the shift fork.

[0013] The two ends of the rotating shaft of the gearbox are respectively connected to the load motor and the loading motor.

[0014] During the test, the load motor and the loading motor are started to simulate the driving conditions of the entire vehicle. When it is detected that the gearbox to be tested meets the shifting timing, the control computer sends a shifting instruction to the shifting actuator. The position selection cylinder drives the position selection connecting rod and the shift cylinder drives the shift connecting rod to perform the shifting action. The pressure sensor, displacement sensor and angle sensor perform real-time monitoring.

[0015] Furthermore, the lower end of the column is slidably connected to the sliding guide rail through a roller.

[0016] Furthermore, the output end of the servo motor I is connected to the screw rod I through the reducer I.

[0017] Furthermore, the gearbox is fixed on a test frame.

[0018] Furthermore, a reducer II is mounted on the top of the column. The input shaft at the upper end of reducer II is connected to servo motor II, while the output shaft at the lower end extends into the column and connects to a vertical lead screw II. The slide plate is mounted on lead screw II through a vertical threaded hole in the slide plate. During operation, the servo motor II rotates lead screw II, which in turn moves the slide plate up and down to adjust the height of the gear selector actuator.

[0019] The technical effect of the present invention is unquestionable. Computer program control replaces manual gear selection and shifting, and the gear selection and shifting test can be carried out continuously day and night for various working condition tests, shortening the test cycle. At the same time, the computer records the data to avoid the subjectivity of the operator. The data is true and reliable, and has more reference value for gearbox adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the connection arrangement for heavy-duty gearbox testing;

[0021] Figure 2 This is a structural diagram of a heavy-duty transmission automatic gear selection and shifting test device;

[0022] Figure 3 This is a schematic diagram of the actuator of the heavy-duty transmission automatic gear selection and shifting test device;

[0023] Figure 4 This is a schematic diagram of the heavy-duty transmission automatic shift test device in operation;

[0024] Figure 5 This is a partial enlarged view of point A.

[0025] In the figure: control computer 1, column 2, gear selection and shifting actuator 3, gear shifting structure 301, connecting frame 3011, pull rod 3012, gear shift connecting rod 3013, pressure sensor 3014, gear shift arm 3015, angle sensor 3016, gear shift cylinder 3017, position selection structure 302, servo motor I 3021, lead screw I 3022, slide 3023, shift rod 3024, shift fork 3025, position selection connecting rod 3026, motor base 3027, displacement sensor 3028, position selection cylinder 3029, slide plate 303, sliding guide rail 4, load motor 5, loading motor 6, gearbox 7, gear shift shaft 701, test frame 8, reducer II 9, servo motor II 10 and lead screw II 11. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the following examples, but it should not be understood that the scope of the present invention is limited to the following examples. Without departing from the above technical ideas of the present invention, various substitutions and modifications can be made according to common technical knowledge and customary means in the art, and all should be included in the scope of protection of the present invention.

[0027] Example 1:

[0028] See also Figure 2 This embodiment discloses a heavy machinery transmission automatic gear selection and shifting test device, including a control computer 1, a column 2, a gear selection and shifting actuator 3 and a sliding guide rail 4.

[0029] The lower end of the column 2 is slidably connected to the horizontal sliding guide rail 4 through a roller, the control computer 1 is fixed on the column 2, and the gear selection and shifting actuator 3 is slidably connected to the column 2 and the sliding direction is vertical.

[0030] A reducer II 9 is mounted on top of the column 2. The input shaft at the upper end of the reducer II 9 is connected to a servo motor II 10, while the output shaft at the lower end extends into the column 2 and connects to a vertical lead screw II 11. A vertical threaded hole is provided in the slide 303, through which the slide 303 is mounted to the lead screw II 11. During operation, the servo motor II 10 rotates the lead screw II 11, which in turn moves the slide 303 up and down to adjust the height of the shift actuator 3.

[0031] See also Figure 3 and 4The gear selection and shifting actuator 3 includes a gear shifting structure 301 , a position selection structure 302 and a slide plate 303 , and the slide plate 303 is slidably connected to the vertical track of the column 2 .

[0032] The shift structure 301 includes a connecting frame 3011, a pull rod 3012, a shift connecting rod 3013 and a shift cylinder 3017. The shift cylinder 3017 is fixed on the vertical slide 303 through the connecting frame 3011 and the output end is vertically downward. The output end of the shift cylinder 3017 is connected to the pull rod 3012. The lower end of the pull rod 3012 is connected to the shift connecting rod 3013 and a pressure sensor 3014 is provided at the connection between the two. The shift connecting rod 3013 is connected to the shift pull arm 3015, and the shift pull arm 3015 is connected to the shift shaft 701 of the gearbox 7 and an angle sensor 3016 and a torque sensor are provided at the connection between the two.

[0033] The position selection structure 302 includes a servo motor I 3021 , a screw rod I 3022 , a slide 3023 , a shift rod 3024 , a shift fork 3025 , a position selection connecting rod 3026 and a position selection cylinder 3029 .

[0034] The servo motor I 3021 is fixed to the slide 303 via a motor base 3027. The output end of the servo motor I 3021 is connected to a horizontal screw rod I 3022 via a reducer I. The screw nut seat is screwed onto the screw rod I 3022. The slide 3023 is connected to the screw nut seat and is slidably connected to the slide 303. The position selection cylinder 3029 is fixed to the slide 3023. The output end of the position selection cylinder 3029 faces downward and is connected to the horizontal shift rod 3024. The shift fork 3025 is connected to the shift rod 3024. A displacement sensor 3028 is mounted on the position selection connecting rod 3026. One end of the position selection connecting rod 3026 is connected to the shift shaft 701 of the transmission 7, and the other end is clamped to the shift fork 3025.

[0035] Both ends of the rotating shaft of the gearbox 7 are connected to the load motor 5 and the loading motor 6 respectively, and the gearbox 7 is fixed on the test frame 8.

[0036] Before the test, the distance and height of the shift structure and the position selection structure relative to the gearbox 7 are adjusted by horizontally moving the column 2 and vertically moving the slide plate 303, and the gearbox 7 is connected to the test device.

[0037] During the test, the load motor 5 and the loading motor 6 are started to simulate the driving condition of the whole vehicle. When it is detected that the gearbox 7 to be tested meets the gear shifting timing, the control computer 1 sends a gear selection and shifting instruction to the gear selection and shifting actuator 3. The position selection cylinder 3029 drives the position selection connecting rod 3026 and the shift cylinder 3017 drives the shift connecting rod 3013 to perform the gear selection and shifting action. The pressure sensor 3014, the displacement sensor 3028 and the angle sensor 3016 perform real-time monitoring, record the gear selection stroke, gear shifting stroke, gear selection force, gear shifting force (which can be converted from the gear shifting stroke), driving speed and other test data, and display them on the screen of the control computer 1.

[0038] Example 2:

[0039] See also Figure 2 This embodiment discloses a heavy machinery transmission automatic gear selection and shifting test device, including a control computer 1, a column 2, a gear selection and shifting actuator 3 and a sliding guide rail 4.

[0040] The lower end of the column 2 is slidably connected to a horizontal sliding guide rail 4, the control computer 1 is fixed on the column 2, and the gear selection and shifting actuator 3 is slidably connected to the column 2 and the sliding direction is vertical.

[0041] See also Figure 3 and 4 The gear selection and shifting actuator 3 includes a gear shifting structure, a position selection structure and a slide plate 303 , and the slide plate 303 is slidably connected to the vertical track of the column 2 .

[0042] The shift structure includes a connecting frame 3011, a pull rod 3012, a shift connecting rod 3013 and a shift cylinder 3017. The shift cylinder 3017 is fixed on the vertical slide 303 through the connecting frame 3011 and the output end is vertically downward. The output end of the shift cylinder 3017 is connected to the pull rod 3012. The lower end of the pull rod 3012 is connected to the shift connecting rod 3013 and a pressure sensor 3014 is provided at the connection between the two. The shift connecting rod 3013 is connected to the shift pull arm 3015. The shift pull arm 3015 is connected to the shift shaft 701 of the gearbox 7 and an angle sensor 3016 is provided at the connection between the two.

[0043] The position selection structure includes a servo motor I 3021 , a screw rod I 3022 , a slide 3023 , a shift rod 3024 , a shift fork 3025 , a position selection connecting rod 3026 and a position selection cylinder 3029 .

[0044] The servo motor I 3021 is fixed to the slide 303 via a motor base 3027. The output end of the servo motor I 3021 is connected to a horizontal screw rod I 3022. A nut is screwed onto the screw rod I 3022. The slide 3023 is connected to the nut and is slidably connected to the slide 303. The position selection cylinder 3029 is fixed to the slide 3023. The output end of the position selection cylinder 3029 faces downward and is connected to the horizontal shift rod 3024. The shift fork 3025 is connected to the shift rod 3024. A displacement sensor 3028 is mounted on the position selection connecting rod 3026. One end of the position selection connecting rod 3026 is connected to the shift shaft 701 of the transmission 7, and the other end is clamped to the shift fork 3025.

[0045] Both ends of the rotating shaft of the gearbox 7 are connected to the load motor 5 and the loading motor 6 respectively.

[0046] During the test, the load motor 5 and the loading motor 6 are started to simulate the driving condition of the whole vehicle. When it is detected that the gearbox 7 to be tested meets the gear shifting timing, the control computer 1 sends a gear selection and shifting instruction to the gear selection and shifting actuator 3. The position selection cylinder 3029 drives the position selection connecting rod 3026 and the shift cylinder 3017 drives the shift connecting rod 3013 to perform the gear selection and shifting action. The pressure sensor 3014, the displacement sensor 3028 and the angle sensor 3016 perform real-time monitoring.

[0047] Example 3:

[0048] The main structure of this embodiment is the same as that of embodiment 2. Furthermore, the lower end of the column 2 is slidably connected to the sliding guide rail 4 through a roller.

[0049] Example 4:

[0050] The main structure of this embodiment is the same as that of embodiment 2. Furthermore, the output end of the servo motor I 3021 is connected to the screw rod I 3022 through the reducer I.

[0051] Example 5:

[0052] The main structure of this embodiment is the same as that of embodiment 2. Furthermore, the gearbox 7 is fixed on the test frame 8.

[0053] Example 6:

[0054] This embodiment shares the same primary structure as Example 2. Furthermore, a reducer II 9 is mounted on top of the column 2. The input shaft at the upper end of the reducer II 9 is connected to a servo motor II 10, while the output shaft at the lower end extends into the column 2 and connects to a vertical lead screw II 11. A vertical threaded through-hole is defined in the slide 303, through which the slide 303 is mounted to the lead screw II 11. During operation, the servo motor II 10 rotates the lead screw II 11, which in turn moves the slide 303 up and down to adjust the height of the shift actuator 3.

Claims

1. Heavy machinery transmission automatic gear selection and shifting test device, characterized by: It comprises a column (2), a gear selection and shifting actuator (3) and a sliding guide rail (4); The lower end of the column (2) is slidably connected to a horizontal sliding guide rail (4), the control computer (1) is fixed on the column (2), and the gear selection and shifting actuator (3) is slidably connected to the column (2) and the sliding direction is vertical; The gear selection and shifting actuator (3) comprises a gear shifting structure (301), a position selection structure (302) and a slide plate (303), wherein the slide plate (303) is slidably connected to a vertical track of the column (2); The shift structure (301) comprises a connecting frame (3011), a pull rod (3012), a shift connecting rod (3013) and a shift cylinder (3017). The shift cylinder (3017) is fixed on a vertical slide (303) through the connecting frame (3011) with its output end facing vertically downward. The output end of the shift cylinder (3017) is connected to the pull rod (3012). The lower end of the pull rod (3012) is connected to the shift connecting rod (3013), and a pressure sensor (3014) is provided at the connection between the two. The shift connecting rod (3013) is connected to a shift pull arm (3015), and the shift pull arm (3015) is connected to a shift shaft (701) of a gearbox (7), and an angle sensor (3016) is provided at the connection between the two. The position selection structure (302) includes a servo motor I (3021), a screw rod I (3022), a slide (3023), a shift rod (3024), a shift fork (3025), a position selection connecting rod (3026) and a position selection cylinder (3029); the servo motor I (3021) is fixed to the slide (303) through a motor base (3027), the output end of the servo motor I (3021) is connected to the horizontal screw rod I (3022), the nut is screwed onto the screw rod I (3022), and the slide (302 3) connected to the nut and slidably connected to the slide (303), the position selection cylinder (3029) is fixed on the slide (3023), the output end of the position selection cylinder (3029) faces downward and is connected to the horizontal shift rod (3024), and the shift fork (3025) is connected to the shift rod (3024); a displacement sensor (3028) is installed on the position selection connecting rod (3026), one end of the position selection connecting rod (3026) is connected to the shift shaft (701) of the gearbox (7), and the other end is clamped to the shift fork (3025); The two ends of the rotating shaft of the gearbox (7) are respectively connected to the load motor (5) and the loading motor (6); During the test, the load motor (5) and the loading motor (6) are started to simulate the driving condition of the entire vehicle. When it is detected that the gearbox (7) to be tested meets the gear shifting timing, the position selection cylinder (3029) drives the position selection connecting rod (3026) and the gear shift cylinder (3017) drives the gear shift connecting rod (3013) to perform gear selection and shifting actions, and the pressure sensor (3014), the displacement sensor (3028) and the angle sensor (3016) perform real-time monitoring.

2. The heavy machinery transmission automatic gear selection and shifting test device according to claim 1 is characterized in that: The lower end of the column (2) is slidably connected to the sliding guide rail (4) via a roller.

3. The heavy machinery transmission automatic gear selection and shifting test device according to claim 1, characterized in that: The output end of the servo motor I (3021) is connected to the screw rod I (3022) via the reducer I.

4. The heavy machinery transmission automatic gear selection and shifting test device according to claim 1, characterized in that: The gearbox (7) is fixed on a test frame (8).

5. The heavy machinery transmission automatic gear selection and shifting test device according to claim 1 is characterized in that: A reducer II (9) is installed on the top of the column (2). The input shaft of the upper end of the reducer II (9) is connected to the servo motor II (10), and the output shaft of the lower end extends into the column (2) and is connected to the vertical screw II (11). A vertical threaded through hole is opened on the slide plate (303), and the slide plate (303) is installed on the screw II (11) through the threaded through hole. When working, the servo motor II (10) drives the screw II (11) to rotate, driving the slide plate (303) to move up and down to adjust the height of the gear selection and shifting actuator (3).

6. The heavy machinery transmission automatic gear selection and shifting test device according to claim 1, characterized in that: The invention also includes a control computer (1); when in operation, the control computer (1) issues a gear selection and shifting instruction to the gear selection and shifting actuator (3); and the pressure sensor (3014), the displacement sensor (3028) and the angle sensor (3016) transmit real-time monitoring information to the control computer (1).

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