CN212672335U

CN212672335U - Structure-updated three-in three-out gear engineering mechanical gearbox

Info

Publication number: CN212672335U
Application number: CN202020658831.9U
Authority: CN
Inventors: 王艳平
Original assignee: Qingzhou Luti Gearbox Factory
Current assignee: Qingzhou Luti Gearbox Factory
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-03-09
Anticipated expiration: 2030-04-15

Abstract

The utility model discloses an engineering machine tool gearbox of three advances three retreat gears of renewal structure, power input shaft and the gear on it of assembly in the box have, the clutch shaft that keeps off and the gear that keeps off that gos forward on it, a fender gear and the clutch and the low-speed clutch that keep off that gos forward, the reverse gear of keeping off the clutch shaft and the gear that keeps off on it, a fender transition gear and keep off gear and reverse gear clutch and keep off the clutch, it keeps off and assembles casing gear one on clutch and the low-speed clutch to go forward, reverse gear and keep off and assemble casing gear two on the clutch, three keep off the clutch shaft and three fender gears on it and casing gear three and output gear meshing output power on it, jackshaft intermediate gear simultaneously with casing gear one and three fender gear meshing. The three-gear clutch is characterized in that a three-gear on a three-gear clutch shaft is coaxially connected with a clutch, and a large gear is fixed on the outer side of a shell gear on the three-gear clutch shaft. This arrangement provides a good balance of rotational speeds between the shafts.

Description

Structure-updated three-in three-out gear engineering mechanical gearbox

Technical Field

The utility model belongs to the technical field of the loader gearbox, what say definitely is an engineering machine tool gearbox that advances three and move back the position of renewal structure.

Background

To the gearbox of current well, small-size loader, especially small-size loader, two are advanced two variable speed that move back and keep off the position mostly, can not adapt to present work needs, chinese utility model patent 201621194911.3 number, the name is: full hydraulic control multi-gear engineering machinery gearbox. The gearbox with three advancing gears and three retreating gears is provided, so that the functions of the gearbox are expanded, but due to the problem of the internal structure of the gearbox, the gearbox has the problem that a high-speed gear and a low-speed gear commonly use the same gear set for speed change, so that the problem of gear adaptation which cannot be overcome exists, and the gearbox is difficult to be applied to practice. Namely: in order to take care of the high speed, the requirement of low speed and large torque cannot be met, so that the gear is accelerated to wear and lose efficacy; in order to take care of the low speed, the gear size is too large, which causes problems of high speed overheating and large power consumption. Chinese utility model patent No. 201721035916.2, the name is: a loader gearbox with a rational gear configuration. The above patent is improved by adding a pair of high speed gears to improve the above problem between high and low speeds. However, the problem of changing the gear ratio between high-speed forward, reverse, and low-speed forward and reverse still remains unchanged, and 2 gears are added, so that the manufacturing and use and maintenance costs of the transmission are increased. Based on above problem the utility model discloses a designer's proposition "improve engineering machine tool gearbox that advances three times of structure and move back the position", the patent number is: 2019206046064. the balance problem between the rotating speed and the power when the engineering machinery is switched between the high speed and the low speed is solved. However, after a period of use, a problem that a group of gears and a shaft overspeed under a no-load condition exists in use is found, and the problem can cause the bearing on the shaft to be damaged in advance, further influences the use and maintenance of the gearbox of the engineering machinery, shortens the maintenance period, increases the failure rate, even causes serious problems of failure of the whole engineering machinery and the like. In order to overcome the problem, the utility model discloses a designer is at the patent number: 2019206046064 the invention aims to provide the utility model based on the careful anatomy and research.

Disclosure of Invention

The invention aims to provide the gearbox for solving the problem of insufficiency. Namely, the engineering mechanical gearbox with the three-in three-out gears of the updated structure is provided.

The technical solution of the utility model is realized in this way, this engineering machine tool gearbox of three advances three reverse gears of renewal structure has power input shaft (18) and input gear (1) fixed on it that assemble inside the gearbox casing, go forward fender clutch shaft (11) and assembly go forward fender gear (3) on this axle, first gear (7) and go forward fender clutch (19) and low-speed fender clutch (20), reverse gear clutch shaft (12) and assembly reverse gear (2) on this axle, first gear transition gear (8) and two gear (9) and reverse gear clutch (21) and two gear clutch (22), go forward fender clutch (19) and low-speed fender clutch (20) and assemble a casing gear (6) jointly, reverse gear clutch (21) and two gear clutch (22) assemble a casing gear (10) jointly, the three-gear clutch comprises a three-gear clutch shaft (13), a three-gear (14) and a three-gear clutch (23) which are assembled on the shaft, and a third shell gear (15) which is installed on a housing of the three-gear clutch, wherein the third shell gear (15) is meshed with an output gear (16) on a power output shaft (17) to output power, an input gear (1) is meshed with a forward gear (3) of a reverse gear (2), and a first shell gear (6) is meshed with a second shell gear (10), and the three-gear clutch is characterized in that an intermediate gear (4) on an intermediate shaft (5) is simultaneously in transmission meshing with the first shell gear (6) and the third shell gear (14).

The utility model discloses a profitable technological effect is: still keep through the permutation and combination between the reasonable layout and the gear engagement to the jackshaft, under the prerequisite condition of only increasing a gear, through the reasonable configuration between intermediate gear and third gear and the casing gear, obtained unexpected velocity ratio equilibrium effect. The reasonable speed ratio between three forward gears and three reverse gears is basically met, and the problems of material waste and incapability of using in the practical application of the gearbox caused by unreasonable gear ratio are solved. Furthermore, on the premise of not changing the whole mechanism of the gearbox, a clutch is added on the outer side of a third gear (14) on a third-gear clutch shaft, and a large gear (25) is added on the outer side of a shell gear III (15) of a third-gear clutch (23) on the third-gear clutch shaft. Thus, when the gearbox works in a three-gear high-speed state, the clutch (24) acts to drive the shell gear three (15) on the three-gear clutch (23) to rotate, the large gear (25) on the shaft of the three-gear clutch (23) cannot rotate, and the first-gear transition gear (8) driven by the second-gear (9) meshed with the first-gear transition gear, the first-gear (7) meshed with the first-gear transition gear and the forward-gear clutch shaft (11) cannot rotate. Thereby effectively avoiding the problem that the first gear (7) and the forward gear clutch shaft (11) overspeed. Although the cost is seemingly increased by adding a clutch and a gearwheel, the use and maintenance costs are indeed saved from the point of view of the overall use of the gearbox, both on the user side and on the manufacturing side. The utilization rate is improved, and sustainable development is realized.

Drawings

Fig. 1 is an expanded view of the gear transmission structure principle of the transmission according to the present invention, wherein the dotted line portion at the upper portion of fig. 1 represents the meshing transmission relationship between the third-gear (14) and the intermediate gear (4), the dotted line portion at the upper portion of the lower serial number (6) represents the mutual meshing transmission relationship between the third-gear (14) and the first housing gear (6), and the specific meshing relationship is shown in fig. 2. Fig. 2 is a schematic diagram of the structural position arrangement of the transmission shaft of the power output end of the transmission case of the present invention. The numbers in the drawings are: 1. input gear, 2, reverse gear, 3, forward gear, 4, intermediate gear, 5, intermediate shaft, 6, casing gear one, 7, first gear, 8, first gear transition gear, 9, second gear, 10, casing gear two, 11, forward clutch shaft, 12, reverse clutch shaft, 13, third gear clutch shaft, 14, third gear, 15, casing gear three, 16, output gear, 17, output shaft, 18, power input shaft, 19, forward clutch, 20, low gear clutch, 21, reverse clutch, 22, second gear clutch, 23, third gear clutch, 24, clutch, 25, bull gear.

Detailed Description

The invention will be described in detail with reference to the following embodiments, which are illustrated in the accompanying drawings. Referring to the attached drawings, the three-in three-reverse engineering mechanical gearbox with the updated structure comprises a power input shaft (18) assembled inside a gearbox body and an input gear (1) fixed on the power input shaft, a forward gear clutch shaft (11), a forward gear (3) assembled on the forward gear clutch shaft, a first gear (7), a forward gear clutch (19) and a low-speed gear clutch (20), a reverse gear clutch shaft (12), a reverse gear (2) assembled on the reverse gear clutch shaft, a first-gear transition gear (8) and a second-gear (9), a reverse gear clutch (21) and a second-gear clutch (22), a first shell gear (6) is assembled on the forward gear clutch (19) and the low-speed gear clutch (20), a second shell gear (10) is assembled on the reverse gear clutch (21) and the second-gear clutch (22), a third-gear clutch shaft (13), a third-gear (14) and a third-gear clutch (23) assembled on the forward gear clutch shaft and a third-gear clutch (13) and a third-gear clutch (23) assembled on the forward gear The clutch is characterized in that a middle gear (4) on an intermediate shaft (5) is simultaneously in transmission engagement with a first shell gear (6) and a third shell gear (14).

The first gear transition gear (8) and the second gear (9) on the reverse gear clutch shaft (12) can be a duplex fixed gear. And a single gear can be installed in a pairing mode, so that the speed ratio of different vehicle types can be adjusted conveniently.

The first-gear, second-gear and third-gear clutches can be hydraulic, electric or mechanical clutches or electromechanical, electrohydraulic, electromagnetic and electromechanical-hydraulic integrated clutches which are widely applied at present, and have no technical obstacles.

The specific speed ratio of the gearbox is designed according to different vehicle types and actual speed requirements, the number of teeth and the modulus between gear pairs are designed, the design and calculation work of the conventional gears is achieved, and the description is omitted.

The specific operation of the forward and reverse gears is described as follows:

forward first gear transmission route:

the forward clutch (19) and the low clutch (20) are engaged.

An input gear (1) on a power input shaft (18) drives a forward gear (3), a forward gear clutch (19), a low-speed gear clutch (20) and a first-gear (7) on a forward gear clutch shaft (11) to rotate, the gear (7) is meshed with and drives a first-gear transition gear (8), the gear (8) drives a second-gear (9) to rotate together, the gear (9) is meshed with a third gear wheel (25), the third gear wheel (25) is coaxial with the third-gear clutch (23), a third shell gear wheel (15) is driven to be meshed with and drive an output gear (16), and torque and power are output through an output shaft (17).

Forward two-gear transmission route:

the forward clutch (19) and the second clutch (22) are engaged.

An input gear (1) on a power input shaft (18) drives a forward gear (3), a forward gear clutch (19) and a first shell gear (6) on the forward gear clutch to rotate, the gear (6) is meshed with a second shell gear (10), the gear (10) drives a reverse gear clutch shaft (12) and a second gear (9) on the reverse gear clutch shaft to rotate together, the gear (9) is meshed with a large gear (25), the large gear (25) is coaxial with a third gear clutch (23), a third shell gear (15) is driven to be meshed with a transmission output gear (16), and torque and power are output through an output shaft (17).

Forward three-gear transmission route:

the forward clutch (19) and the clutch (24) are operated.

An input gear (1) on a power input shaft (18) drives a forward gear (3), a forward gear clutch (19) and a first shell gear (6) on the forward gear clutch to rotate, the first shell gear (6) is meshed with a middle gear (4) on an intermediate shaft (5), the middle gear (4) is meshed with a third gear (14), a third shell gear (15) on a third gear clutch (23) is transmitted through a clutch (24), the third shell gear (15) is meshed with a transmission output gear (16), and torque and power are output through an output shaft (17). At this time, the third clutch 23 is not operated, and therefore the large gear 25 on the third clutch shaft 13 is not rotated.

And backing off (also commonly called reverse gear) the first gear transmission line.

At this time, the reverse clutch (21), the low-speed clutch (20), and the third-speed clutch (23) are operated.

An input gear (1) on a power input shaft (18) drives a reverse gear (2), a reverse gear clutch (21) and a shell gear II (10) on the reverse gear clutch to rotate, the gear (10) is meshed with the shell gear I (6), the gear (6) drives a forward clutch shaft (11) and a first gear (7) on the forward clutch shaft to rotate together, the gear (7) is meshed with a first gear transition gear (8) and drives a second gear (9) to rotate simultaneously, the second gear (9) drives a large gear III (25), the large gear (25) is coaxially fixed with a third gear clutch shaft (13) and drives a third gear (23) and a shell gear III (15) on the third gear clutch shaft to be meshed with a transmission output gear (16), and torque and power are output through an output shaft (17).

And a backward (also commonly called reverse gear) two-gear transmission route.

At this time, the reverse clutch (21), the second clutch (22) and the third clutch (23) are operated.

An input gear (1) on a power input shaft (18) drives a reverse gear (2) to rotate, the gear (2) drives a reverse gear clutch shaft (12) and a first gear transition gear (8) and a second gear (9) on the reverse gear clutch shaft to simultaneously rotate, the second gear (9) is meshed with a transmission large gear (25), the large gear (25) is coaxially fixed with a third gear clutch shaft (13) to drive a third gear clutch (23) and an upper shell gear (15), the third shell gear (15) is meshed with a transmission output gear (16), and torque and power are output through an output shaft (17).

And a reverse (also commonly called reverse gear) three-gear transmission route.

The reverse clutch (21) and the clutch (24) are operated.

An input gear (1) on a power input shaft (18) drives a reverse gear (2) and a shell gear II (10) on a reverse gear clutch (21) to rotate, the shell gear II is meshed with a shell gear I (6), the shell gear I (6) is meshed with an intermediate gear (4) on an intermediate shaft (5), the intermediate gear (4) is meshed with a third gear (14) on a transmission three-gear clutch shaft (13), a clutch (24) and a shell gear III (15) on a three-gear clutch (23) are simultaneously driven, the shell gear III (15) is meshed with a transmission output gear (16), and torque and power are output through an output shaft (17). At this time, the third clutch 23 is not operated, and therefore the large gear 25 on the third clutch shaft 13 is not rotated.

3.0M is given below³The following example of gear ratios for the transmission of a bucket capacity loader:

chinese utility model patent No. 201621194911.3, the name is: the transmission ratio of the full hydraulic control multi-gear engineering mechanical transmission is as follows: first gear 2.57, second gear 1.20, third gear 0.70. It can be seen from the figures that the gear ratios cannot differ too much, and therefore, the actual use is limited by the gearbox since the high speed is not used and the low speed is not used, and the loader cannot exert the efficiency which it should have. Affecting the popularization and application.

The utility model discloses a gear ratio of gearbox does: first gear 3.43, second gear 1.96, third gear 0.60. Basically meets the requirement of speed ratio design and the requirement of uniform stress among all gears, has reasonable high, medium and low speed distribution, meets the requirement on speed in the actual use of the loader, and can fully exert the use efficiency of the loader. Has the remarkable characteristics of energy conservation, consumption reduction, economy and durability, and has greater practical application value and popularization value. Also, compared to patent No.: 2019206046064, taking engine speed 2200-: 2019206046064 patent, the gear (7) and the shaft (11) have limit rotation speed of about 11400-12400 rpm, the shaft on the shaft is affected by high rotation speed, the durability is poor, and the failure due to overheating and high speed is often caused. After the improvement of the utility model, the gear (7) and the shaft (11) do not rotate under the same condition because the big gear (25) does not rotate, therefore, the gear (7) and the shaft (11) do not rotate. Therefore, the service performance and the durability of the bearing on the shaft (11) are improved, and the service performance of the gearbox is integrally improved. The cost is saved, and sustainable development is realized. Through the reasonable transmission change of the gear and the clutch, the problems of high speed, overheating and the like generated on a local shaft and a bearing are avoided, and the method has great creativity and positive progress significance.

Claims

1. A three-in three-reverse gear engineering mechanical transmission with a renewed structure comprises a power input shaft (18) assembled in a transmission case body and an input gear (1) fixed on the power input shaft, a forward gear clutch shaft (11), a forward gear (3) assembled on the forward gear clutch shaft, a first gear (7), a forward gear clutch (19) and a low-speed gear clutch (20), a reverse gear clutch shaft (12), a reverse gear (2), a first gear transition gear (8), a second gear (9), a reverse gear clutch (21) and a second gear clutch (22) assembled on the reverse gear clutch shaft, a first shell gear (6) assembled on the forward gear clutch (19) and the low-speed gear clutch (20), a second shell gear (10) assembled on the reverse gear clutch (21) and the second gear clutch (22), a third gear clutch shaft (13), a third gear (14) and a third gear clutch (23) assembled on the forward gear clutch shaft and a third gear clutch shell (23) assembled on the low gear clutch (20) and a third clutch shell assembled on the third gear shell The transmission mechanism is characterized in that a third gear (14) on a third gear clutch shaft (13) is coaxially connected with a clutch (24), and a large gear (25) meshed with a second gear (9) is fixed on the outer side of the third gear (15) on the third gear clutch shaft (13).