Gear shifting mechanism of mine truck

Abstract

The utility model provides a mine truck gear shifting mechanism which comprises a gear shifting part, a torque transmission part and a rocker arm control part which are sequentially connected in a transmission mode, the gear shifting part is fixed in a cab of a mine truck through a gear shifting installation plate, the included angle P between the gear shifting installation plate and the horizontal plane is larger than or equal to 4.5 degrees and smaller than or equal to 6 degrees, and the rocker arm control part is connected with the torque transmission part. And the opening direction of the included angle P points to the front of the cab. The gear shifting part comprises a gear shifting handle, a gear shifting rod and a gear shifter which are connected from top to bottom, the gear shifter comprises a gear shifting support arm and a gear selecting support arm, and the gear shifting rod is in transmission connection with the gear shifting support arm and the gear selecting support arm; the torque transmission part comprises a gear shifting flexible shaft and a gear selecting flexible shaft, the output end of the gear shifting supporting arm is in transmission connection with the gear shifting flexible shaft, and the output end of the gear selecting supporting arm is in transmission connection with the gear selecting flexible shaft.

Description

Technical Field

[0001] The utility model belongs to the field of mining vehicle cab design, relates to some mechanisms in the mining vehicle cab, and is particularly a mining vehicle shifting mechanism. Background Art

[0002] With the demand for mining energy and the maturity and development of various technologies, the demand for wide-body mining dump trucks (hereinafter referred to as wide-body mining trucks) in mining is increasing day by day. Combined with the actual situation in the mining process, the vehicles need to operate for more than 20 hours a day, and the comfort problem of the driver during driving has gradually become prominent. Among them, gear shifting is the most frequent action of the driver during vehicle operation, and the effort-saving, light and comfortable gear shifting operation is particularly important.

[0003] However, in the prior art, it is becoming more and more common to use a narrow-body cab on a wide-body mining vehicle. The interior space of the narrow-body cab is relatively narrow, and the shifter mounting plate located between the auxiliary instrument panel on the right side of the seat is narrow. During the shifting process, the gap between the handle and the main and auxiliary instrument panel of the traditional shift mechanism is less than 50 mm, which easily causes motion interference and causes scratches between the driver's hands and surrounding parts. In addition, there is a problem of heavy operating force, which seriously affects the comfort of the driver's shifting operation when the driver needs to work continuously for up to 20 hours. Utility Model Content

[0004] The utility model aims to provide a shift mechanism for a mining vehicle, so as to solve the technical problems existing in the prior art that the shift mechanism in a narrow cab requires a large space, is prone to motion interference with surrounding parts, has heavy operating force and poor sealing.

[0005] In order to achieve the above purpose, the specific technical solution of the utility model is as follows:

[0006] A shift mechanism for a mining vehicle comprises a shift part, a torque transmission part and a rocker arm control part which are sequentially connected in transmission. The shift part is fixed in the driving cab of the mining vehicle through a shift mounting plate. The angle between the shift mounting plate and the horizontal plane is P, wherein 4.5°≤P≤6°, and the opening direction of the angle P points to the front of the driving cab.

[0007] The shifting part comprises a shifting handle, a shifting rod and a shifter connected from top to bottom, the shifter comprises a shifting arm and a gear selection arm, and the shifting rod is respectively connected to the shifting arm and the gear selection arm in a transmission manner;

[0008] The torque transmission part includes a gear shift flexible shaft and a gear selection flexible shaft. The output end of the gear shift support arm is transmission-connected to the gear shift flexible shaft, and the output end of the gear selection support arm is transmission-connected to the gear selection flexible shaft.

[0009] The shift arm comprises an upper shift arm and a lower shift arm which are integrally arranged, and the shift lever ratio i1 of the shifter is shift lever length / lower shift arm length, wherein the shift lever length is 530 mm, and the lower shift arm length of the shift arm is 91 mm.

[0010] The gear select arm includes an upper gear select arm, a middle gear select arm and a lower gear select arm, and the gear select lever ratio i2 of the gear shifter = (gear shift lever length / upper gear select arm length)*(middle gear select arm length / lower gear select arm length), wherein the gear shift lever length is 530mm, the upper gear select arm length is 44.4mm, the middle gear select arm length is 29mm, and the lower gear select arm length is 65mm.

[0011] It also includes a gearbox, the shift flexible shaft is connected to the gearbox through a shift rocker arm, the gear selection flexible shaft is connected to the gearbox through a gear selection rocker arm, and the shift rocker arm and the gear selection rocker arm are arranged outside the gearbox through a flexible shaft bracket.

[0012] The gearbox shift effective stroke of the gearbox=2*gearbox end shift radius*sin(gearbox shift center angle / 2);

[0013] The gearbox shift radius is 80 mm, and the gearbox shift center angle is 12.5°;

[0014] The gearbox gear selection effective stroke of the gearbox=2*gearbox end gear selection radius*sin(gearbox gear selection center angle / 2);

[0015] The gear selection radius at the gearbox end is 65 mm, and the gear selection center angle of the gearbox is 12.5°.

[0016] The effective shifting stroke of the shift lever = shift lever ratio i1* gearbox effective shifting stroke / (shift flexible shaft efficiency* shifter efficiency* flexible shaft arrangement efficiency);

[0017] The shift flexible shaft efficiency is 0.85, the shifter efficiency is 0.9, and the flexible shaft arrangement efficiency is 0.95.

[0018] The effective gear selection stroke of the shift lever = gear selection lever ratio i2*gearbox effective gear selection stroke / (gear shift flexible shaft efficiency*shifter efficiency*flexible shaft arrangement efficiency);

[0019] The shift flexible shaft efficiency is 0.85, the shifter efficiency is 0.9, and the flexible shaft arrangement efficiency is 0.95.

[0020] The shifting force of the shift lever = maximum shifting force at the gearbox end / (gearbox end shifting radius / 65.5 * shift lever ratio) / (shift flexible shaft efficiency * shifter efficiency * flexible shaft layout efficiency);

[0021] The maximum shifting force at the gearbox end is 265N.

[0022] The shift lever's shift force = maximum shift force at the gearbox end / (gearbox end shift radius / 55 * shift lever ratio) / (shift flexible shaft efficiency * shifter efficiency * flexible shaft layout efficiency);

[0023] The maximum gear selection force at the gearbox end is 325N.

[0024] The beneficial effect of the utility model is that the utility model provides a mining vehicle shifting mechanism, which is arranged in a narrow-body cab on a wide-body mining vehicle. By setting a shift mounting plate with an inclination angle of P, the gap between the shift handle and the peripheral parts at the front of the cab is enlarged, so that the gap is greater than 50 mm, thereby effectively avoiding the driver from scratching the peripheral parts in the cab during the shifting process, thereby improving the driver's comfort in shifting.

[0025] Secondly, the utility model realizes effective adjustment of the effective shifting stroke, the effective gear selection stroke, the shifting force and the gear selection force of the shift lever by setting the size and ratio between the components in the shift mechanism, effectively shortens the shifting and gear selection stroke of the shift lever, reduces the shifting force and the gear selection force during shifting and gear selection, further avoids the collision between the driver's hands and the components in the cab, and significantly reduces the operating force when operating the shift lever, improves the driver's driving comfort, and thus achieves the effect of enabling the driver to operate comfortably under the condition of long-term continuous work. Therefore, the technical solution provided by the utility model is suitable for promotion and application in the narrow-body cab of wide-body mining vehicles that require small space, save effort in operation, and have high comfort requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0027] Figure 2 for Figure 1 A partial enlarged schematic diagram of the components at the middle flexible shaft support;

[0028] Figure 3 It is a schematic diagram of the structure when the shifter is installed on the shift mounting plate;

[0029] Figure 4 for Figure 3 A local enlarged schematic diagram at point A.

[0030] Explanation of the markings in the figure: 1. Shift handle, 2. Shift lever, 3. Dust cover, 4. Shifter, 5. Shift flexible shaft, 6. Shift rocker arm, 7. Shift selection rocker arm, 8. Flexible shaft bracket, 9. Shift selection flexible shaft, 10. Shift mounting plate. DETAILED DESCRIPTION

[0031] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0032] like Figures 1 to 4 As shown, the utility model provides a shift mechanism for a mining vehicle, which includes a shift part, a torque transmission part and a rocker arm control part which are sequentially connected in transmission. The shift part includes a shift handle 1, a shift rod 2 and a shifter 4 which are connected from top to bottom. The shifter 4 is fixed in the cab of the mining vehicle through a shift mounting plate 10. The angle between the shift mounting plate 10 and the horizontal plane is P, wherein 4.5°≤P≤6°, preferably 5.5°, and the opening direction of the angle P points to the front of the cab. Through the above arrangement, the gap between the movement trajectory of the shift handle 1 during the shifting process and its surrounding parts can be effectively adjusted to be greater than 50mm, which can effectively prevent the driver's hand from colliding with the surrounding parts of the shift rod 2 during the operation. In addition, in order to prevent dust from accumulating in the shift rod 2 and the shifter 4 in the cab, in this embodiment, a dust cover 3 is provided between the root of the shift rod 2 and the shift mounting plate 10.

[0033] Furthermore, the shifter 4 includes a shift arm and a gear selection arm, and the shift lever 2 is respectively connected to the shift arm and the gear selection arm in transmission connection; the torque transmission part includes a shift flexible shaft 5 and a gear selection flexible shaft 9, the output end of the shift arm is connected to the shift flexible shaft 5 in transmission connection, and the output end of the gear selection arm is connected to the gear selection flexible shaft 9 in transmission connection.

[0034] A conventional shift arm generally includes an upper shift arm and a lower shift arm that are integrally arranged. The difference between this embodiment and the conventional technology is that the shift lever ratio i1 of the shifter 4 = the length of the shift rod 2 / the length of the lower shift arm, wherein the length of the shift rod 2 is set to 530 mm, and the length of the lower shift arm of the shift arm is 91 mm, and the shift lever ratio i1 is calculated to be 5.824.

[0035] Furthermore, a conventional gear select arm includes an upper gear select arm, a middle gear select arm and a lower gear select arm. The difference between this embodiment and the conventional technology is that the gear select lever ratio i2 of the gear shifter 4 in this embodiment is i2=(length of the gear shift lever 2 / length of the upper gear select arm)*(length of the middle gear select arm / length of the lower gear select arm), wherein the length of the gear shift lever 2 is set to 530 mm, the length of the upper gear select arm is 44.4 mm, the length of the middle gear select arm is 29 mm, and the length of the lower gear select arm is 65 mm, and the calculated gear select lever ratio i2=5.325.

[0036] In addition, the shift mechanism in this embodiment also includes a gearbox, the shift soft shaft 5 is connected to the gearbox through the shift rocker arm 6, the gear selection soft shaft 9 is connected to the gearbox through the gear selection rocker arm 7, and the shift rocker arm 6 and the gear selection rocker arm 7 are arranged outside the gearbox through a soft shaft bracket 8.

[0037] Different from the conventional technical solution, the gearbox shift effective stroke S1 of the gearbox in this embodiment is 2*gearbox end shift radius*sin(gearbox shift center angle / 2), wherein the gearbox shift radius is set to 80 mm, the gearbox shift center angle is set to 12.5°, and the gearbox shift effective stroke S1 is calculated to be 17.4 mm;

[0038] The gearbox's gear selection effective stroke S2=2*gearbox end gear selection radius*sin(gearbox gear selection center angle / 2), wherein the gearbox end gear selection radius is set to 65 mm, the gearbox gear selection center angle is set to 12.5°, and the calculated gearbox gear selection effective stroke S2=16.9 mm.

[0039] From this, the effective shifting stroke of the shift lever 2 can be calculated:

[0040] The effective shifting stroke of the shift lever 2 = shift lever ratio i1 * gearbox effective shifting stroke / (shift flexible shaft 5 efficiency * shifter 4 efficiency * flexible shaft layout efficiency), wherein the shift flexible shaft 5 efficiency is 0.85, the shifter 4 efficiency is 0.9, and the flexible shaft layout efficiency is 0.95. The calculated effective shifting stroke of the shift lever 2 = 139.5 mm.

[0041] Effective gear selection travel of shift lever 2:

[0042] The effective gear selection stroke of the shift lever 2 = gear selection lever ratio i2 * gearbox effective gear selection stroke / (shift flexible shaft 5 efficiency * shifter 4 efficiency * flexible shaft layout efficiency), wherein the shift flexible shaft 5 efficiency is 0.85, the shifter 4 efficiency is 0.9, and the flexible shaft layout efficiency is 0.95. Calculation shows that the effective gear selection stroke of the shift lever 2 = 123.8 mm.

[0043] And the shift force of shift lever 2:

[0044] The shifting force of the shift lever 2 = the maximum shifting force at the gearbox end / (the gearbox end shifting radius / 65.5 * the shift lever ratio) / (the efficiency of the shifting flexible shaft 5 * the efficiency of the shifter 4 * the efficiency of the flexible shaft arrangement);

[0045] The maximum shifting force at the transmission end is 265N, and the shifting force of the shift lever 2 is calculated to be 51.7N.

[0046] Shift lever 2 selection force:

[0047] The shift lever 2's shifting force = maximum shift lever force at the gearbox end / (gearbox end shifting radius / 55 * shift lever ratio) / (shift flexible shaft 5 efficiency * shifter 4 efficiency * flexible shaft arrangement efficiency);

[0048] The maximum gear selection force at the transmission end is 325N, and the gear selection force of the shift lever 2 is calculated to be 71.7N.

[0049] This embodiment sets the length of the shift lever 2, the size of the shift arm and the gear selection arm in the shifter 4, the gear shift radius and the gear selection radius at the transmission end, and the angle of the gear selection center angle and the gear shift center angle, and adjusts the efficiency of the shift flexible shaft 5, the efficiency of the shifter 4 and the flexible shaft arrangement rate, so as to effectively reduce the effective shift and gear selection stroke of the shift lever 2, reduce the operating force when operating the shift lever 2 for shifting and selecting gears, and effectively improve the comfort of the driver for long-term driving in a narrow-body cab.

[0050] It should be noted that the shift arm, gear selection arm and other components involved in this embodiment are all existing technologies, and the technical problem to be solved by this embodiment does not involve their structure. Therefore, there is no need to mark them in the figure.

[0051] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A gear shift mechanism for a mining vehicle, characterized in that: It comprises a shifting part, a torque transmission part and a rocker arm control part which are sequentially connected in transmission. The shifting part is fixed in the driving cab of the mining vehicle through a shifting mounting plate (10). The included angle between the shifting mounting plate (10) and the horizontal plane is P, wherein 4.5°≤P≤6°, and the opening direction of the included angle P points to the front of the driving cab.

2. A mining vehicle shifting mechanism according to claim 1, characterized in that: The shifting part comprises a shifting handle (1), a shifting rod (2) and a shifter (4) connected from top to bottom, the shifter (4) comprises a shifting arm and a gear selection arm, and the shifting rod (2) is respectively connected to the shifting arm and the gear selection arm in a transmission manner; The torque transmission part comprises a gear shifting flexible shaft (5) and a gear selection flexible shaft (9); the output end of the gear shifting support arm is transmission-connected to the gear shifting flexible shaft (5); and the output end of the gear selection support arm is transmission-connected to the gear selection flexible shaft (9).

3. A mining vehicle shifting mechanism according to claim 2, characterized in that: The shift arm comprises an upper shift arm and a lower shift arm which are arranged integrally, and the shift lever ratio i1 of the shifter (4) is equal to the length of the shift lever (2) / the length of the lower shift arm, wherein the length of the shift lever (2) is 530 mm, and the length of the lower shift arm of the shift arm is 91 mm.

4. A mining vehicle shifting mechanism according to claim 3, characterized in that: The gear selection arm comprises an upper gear selection arm, a middle gear selection arm and a lower gear selection arm, and the gear selection lever ratio i2 of the gear shifter (4) is i=(length of the gear shift lever (2) / length of the upper gear selection arm)*(length of the middle gear selection arm / length of the lower gear selection arm), wherein the length of the gear shift lever (2) is 530 mm, the length of the upper gear selection arm is 44.4 mm, the length of the middle gear selection arm is 29 mm, and the length of the lower gear selection arm is 65 mm.

5. A mining vehicle shifting mechanism according to claim 4, characterized in that: It also includes a gearbox, the gear shift flexible shaft (5) is connected to the gearbox through a gear shift rocker arm (6), the gear selection flexible shaft (9) is connected to the gearbox through a gear selection rocker arm (7), and the gear shift rocker arm (6) and the gear selection rocker arm (7) are arranged outside the gearbox through a flexible shaft bracket (8).

6. A mining vehicle shifting mechanism according to claim 5, characterized in that: The gearbox shift effective stroke of the gearbox=2*gearbox end shift radius*sin(gearbox shift center angle / 2); The gearbox shift radius is 80 mm, and the gearbox shift center angle is 12.5°; The gearbox gear selection effective stroke of the gearbox=2*gearbox end gear selection radius*sin(gearbox gear selection center angle / 2); The gear selection radius at the gearbox end is 65 mm, and the gear selection center angle of the gearbox is 12.5°.

7. A mining vehicle shifting mechanism according to claim 6, characterized in that: The effective shifting stroke of the shift lever (2) = shift lever ratio i1* gearbox effective shifting stroke / (shift flexible shaft (5) efficiency* shifter (4) efficiency* flexible shaft arrangement efficiency); The efficiency of the gear shift flexible shaft (5) is 0.85, the efficiency of the gear shifter (4) is 0.9, and the efficiency of the flexible shaft arrangement is 0.

95.

8. A mining vehicle shifting mechanism according to claim 6, characterized in that: The effective gear selection stroke of the shift lever (2) = gear selection lever ratio i2* gearbox effective gear selection stroke / (shift flexible shaft (5) efficiency* shifter (4) efficiency* flexible shaft arrangement efficiency); The efficiency of the gear shift flexible shaft (5) is 0.85, the efficiency of the gear shifter (4) is 0.9, and the efficiency of the flexible shaft arrangement is 0.

95.

9. A mining vehicle shifting mechanism according to claim 7, characterized in that: The shifting force of the shifting lever (2) = maximum shifting force at the gearbox end / (gearbox end shifting radius / 65.5 * shift lever ratio) / (shifting flexible shaft (5) efficiency * shifter (4) efficiency * flexible shaft arrangement efficiency); The maximum shifting force at the gearbox end is 265N.

10. A mining vehicle shifting mechanism according to claim 8, characterized in that: The gear selection force of the shift lever (2) = the maximum gear selection force at the gearbox end / (gearbox end gear selection radius / 55*gear selection lever ratio) / (gear shift flexible shaft (5) efficiency*gear shifter (4) efficiency*flexible shaft arrangement efficiency); The maximum gear selection force at the gearbox end is 325N.

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