CN102032342B - Novel gear self-locking type transmission output device - Google Patents

Abstract

The invention discloses an output device of a gear self-locking transmission, which is mainly composed of shift forks, sliding sleeves, connecting sleeves, high-grade gears, low-gear gears, inner rings of needle roller bearings, needle roller bearings, output shafts and other components ;The middle position of the output shaft is equipped with a connecting sleeve, and the sliding sleeve with a shift fork is set on the outer spline of the connecting sleeve; Equipped with high-grade input gear and low-gear input gear with needle bearings; the shift fork drives the sliding sleeve to switch between the high-gear input gear and the low-gear input gear, and the sliding sleeve is at the position of the high-gear input gear or the low-gear input gear All positions can generate self-locking, preventing the sliding sleeve from sliding to the neutral position between the high gear input gear and the low gear input gear. The invention has the advantages of simple structure, reliable locking and convenient operation, assembly and disassembly.

Description

A gear self-locking transmission output device

technical field

The invention relates to the field of mechanical transmission, and belongs to a gear position self-locking transmission output device.

Background technique

At present, the transmissions on the market can be divided into two categories: hydraulic transmissions and mechanical transmissions according to the presence or absence of hydraulic torque converters. They are widely used in automobiles, loaders, scrapers, excavators, tanks, armored vehicles, and rail cars. , oil drilling machinery and mining machinery and other fields, it is an important transmission device in the mechanical transmission system, which mainly plays the role of variable speed and torque. However, the heavy-duty transmission used for field work, because of its poor working environment and harsh working conditions, the large range of output torque of the transmission, high frequency, and the machining error of the gear in the heavy-duty transmission, the axial force of the gear cannot be completely eliminated, so in During the operation of the vehicle, it is easy to cause the gear position of the transmission to shift to neutral, thus causing the working machine to fail to work normally. If a mining vehicle equipped with a transmission is driven on a downhill section, major safety accidents are more likely to occur.

Contents of the invention

The technical problem solved by the invention: In order to overcome the defect that the transmission gear shifts to neutral during the operation of the mining vehicle equipped with a heavy-duty transmission, and improve the working efficiency and safety of the working machine, a simple structure, A self-locking gear transmission output device with reliable performance and low cost.

Technical scheme of the present invention:

The gear self-locking transmission output device of the present invention mainly includes an output shaft (1), a needle roller bearing inner ring (2), a needle roller bearing (3), a low gear input gear (4), a sliding sleeve (5), a shift fork (6), connecting sleeve (7) and high-grade input gear (8). The middle position of the output shaft (1) is equipped with a connecting sleeve (7), the sliding sleeve (5) with the shift fork (6) is set on the external spline of the connecting sleeve (7), and the connecting sleeve on the output shaft (1) The left and right ends of (7) are equipped with needle roller bearing inner rings (2), and the needle roller bearing inner rings (2) at both ends are respectively equipped with low gear input gears (4) and high gears with needle bearings (3). The input gear (8) and the shift fork (6) can drive the sliding sleeve (5) to switch between the low gear input gear (4) and the high gear input gear (8). There is a machined groove with a width of 2.5mm and a depth of 1.8mm at a ratio of 0.45 to the right based on the left end of the inner hole of the sliding sleeve (5). This groove divides the sliding sleeve (5) into short sections and long sections. There are two parts of the segment, and the rod spacing of the involute inner splines of the two segments is different. The present invention does not change the basic mechanism of the output device of the traditional transmission, and utilizes the difference in rod spacing between the short section and the long section of the involute inner splines of the sliding sleeve (5). 7) When the gears are meshed and the gear input gear is rotated under force, the right or left end of the involute inner spline of the short section or long section of the sliding sleeve will be dislocated due to inertia and resist the corresponding involute opening of the connecting sleeve (7) The left end or the right end of the spline outside the line, and then the sliding sleeve (5) realizes self-locking at the position of the gear input gear, preventing the sliding sleeve (5) from sliding to the low gear input gear (4) and the high gear input gear during the working process. Neutral position between gears (8).

Description of drawings

Fig. 1 is the front view of the gear position self-locking type transmission output device when the transmission is in neutral;

Fig. 2 is the front view of the gear position self-locking type transmission output device when the transmission is in low gear;

Fig. 3 is the front view of the gear self-locking transmission output device when the transmission is in high gear;

Figure 4 is the front view of the sliding sleeve

In the figure: 1. Output shaft, 2. Needle roller bearing inner ring, 3. Needle roller bearing, 4. Low gear input gear, 5. Sliding sleeve, 6. Shift fork, 7. Connecting sleeve, 8. High gear input gear

Detailed ways

As shown in Figure 1, the middle part of the output shaft (1) is equipped with a connecting sleeve (7), the standard involute internal spline of the connecting sleeve (7) and the standard involute external spline of the output shaft (1) The outer circle of the connecting sleeve (7) is equipped with a sliding sleeve (5) with a shift fork (6), the two are engaged, and the shift fork (6) is set on one end of the annular groove on the outer circle of the sliding sleeve (5) It is in the shape of "U", and the screw hole at the other end is the connection port for installing the manual operation mechanism; the left and right ends of the connecting sleeve (7) on the output shaft (1) are equipped with needle roller bearing inner rings (2), and the needle roller bearings The outer circle of the inner ring of the bearing (2) is respectively equipped with the low gear input gear (4) and the higher gear input gear (8) with the needle bearing (3), and the outer circle of the inner ring of the needle bearing (2) is The raceway of the needle bearing (3), the standard involute internal spline of the inner hole of the needle bearing inner ring (2) meshes with the standard involute external spline of the output shaft (1); ) The left end of the inner hole is the base at the ratio of 0.45 to the right. There is a machined groove with a width of 2.5mm and a depth of 1.8mm. This groove divides the sliding sleeve (5) into two parts, a short section and a long section. The sliding sleeve (5) The distance between the short and long involute internal spline rods is different, and the distance between the short involute internal spline rods and the low gear input gear (4), high gear input gear (8) and connecting sleeve (7) The parameters of the involute external splines are made according to the national standard, and the distance between the rods of the long-section involute internal splines is increased by 1mm on the basis of the national standard; when the mechanical transmission is in neutral, the sliding sleeve ( 5) In the middle position of the connecting sleeve (7), the sliding sleeve (5) does not mesh with the standard involute external spline of the low gear input gear (4) or the high gear input gear (8); as shown in Figure 2 As shown, when the transmission is in low gear, the sliding sleeve (5) is pushed to one end of the low gear input gear (4), and the standard involute internal spline of the short section of the sliding sleeve (5) is connected with the low gear input gear (4) The standard involute external splines of the sliding sleeve (5) mesh with the standard involute external splines of the long section of the sliding sleeve (5) and the standard involute external splines of the connecting sleeve (7), and the low gear input gear ( 4) When the force starts to rotate, the short section of the standard involute internal spline of the sliding sleeve (5) will be circumferentially misaligned due to inertia, and the right end of the short section of the involute internal spline will be against the connecting sleeve (7). The left end of the involute external spline prevents the sliding sleeve (5) from moving to the neutral gear axially to the right, and eliminates the phenomenon of gear jumping; as shown in Figure 3, when the transmission is high-grade, the sliding sleeve (5) ) is pushed to one end of the high-grade input gear (8), and the long section of the sliding sleeve (5) has a large rod spacing involute internal spline meshed with the standard involute external spline of the high-grade input gear (8), The short section of the standard involute internal spline of the sliding sleeve (5) meshes with the standard involute external spline of the connecting sleeve (7). Due to inertia, the inner splines in the long section of the large rod distance will be dislocated in a circle, and the left end of the long section of the involute inner spline will be against the right end of the involute outer spline of the connecting sleeve (7), thereby preventing the sliding sleeve from (5) The shaft moves upward toward the neutral gear to the left, eliminating the phenomenon of jumping gears.

Claims (1)

1. a gear self-locking type transmission output device, mainly by output shaft (1), needle bearing inner ring (2), needle bearing (3), low-grade location input gear (4), sliding sleeve (5), shift fork (6), connecting sleeve (7) and high tap position input gear (8) form, connecting sleeve (7) is equipped with in the neutral position of output shaft (1), sliding sleeve (5) with shift fork (6) is enclosed within on the external splines of connecting sleeve (7), needle bearing inner ring (2) is all equipped with at the two ends, left and right of output shaft (1) upper joint sleeve (7), low-grade location input gear (4) and the high tap position input gear (8) of band needle bearing (3) are housed respectively on the needle bearing inner ring (2) at two ends, shift fork (6) can drive sliding sleeve (5) to switch between low-grade location input gear (4) and high tap position input gear (8), it is characterized in that: having processed out wide as 2.5mm taking sliding sleeve (5) endoporus left end as benchmark 0.45 ratio place to the right, dark is the groove of 1.8mm, this groove is divided into short section and long section two-part sliding sleeve (5), short section of sliding sleeve (5) is different with the involute inner spline interrod spacing of long section, its involute inner spline interrod spacing of short-and-medium section and low-grade location input gear (4), the involute outer spline parameter of high tap position input gear (8) and connecting sleeve (7) is made by GB, and the interrod spacing of the involute inner spline of long section is to strengthen 1mm on GB basis.