CN211820693U - Gear selecting and shifting mechanism of wheel type excavator - Google Patents

Abstract

A gear selecting and shifting mechanism of a wheel type excavator comprises an operating handle, a first gear shifting rod, a second gear shifting rod, a first gear selecting rod, a second gear selecting rod, a first middle rocker arm and a second middle rocker arm, wherein the first gear shifting rod is connected with the operating handle and the first middle rocker arm through a first rod end bearing and a second rod end bearing respectively; the second gear shifting rod is respectively connected with the first intermediate rocker arm and the gearbox through a third rod end bearing and a fourth rod end bearing; the first gear selecting rod is respectively connected with the operating handle and the second middle rocker arm through a fifth rod end bearing and a sixth rod end bearing; the second gear selecting rod is respectively connected with the second intermediate rocker arm and the gearbox through a seventh rod end bearing and an eighth rod end bearing; the first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are hard rods; with the help of the structure, the utility model discloses select gearshift's simple structure, firmly and can arrange in a flexible way in the driver's cabin, the big and distance of transmission strength is far away, and transmission efficiency is high and keep off the position and switch smoothly, and longe-lived and with low costs.

Description

Gear selecting and shifting mechanism of wheel type excavator

Technical Field

The utility model relates to a heavy automobile selects the manipulation field of shifting, especially indicates a selection gearshift of wheeled excavator.

Background

The hydraulic mechanical transmission control devices of the existing wheel type excavator mainly comprise two types, one type is the hard rod transmission control, and the other type is the flexible shaft transmission control, but the existing two types of control devices have many problems; the conventional hard rod transmission is controlled by the hard rod, so that the hard rod cannot be bent, power can be transmitted only in a straight line, the transmission distance is short, the arrangement difficulty cannot be caused by changing the transmission direction, intermediate hinge points are increased, and the use efficiency can be reduced by the friction between connecting pieces and the self weight of a rod piece; the diameter of a steel core of the flexible shaft is light and thin, so that the flexible shaft transmission is easy to wear and tear during relative movement between the inner part of a sleeve and the wall of a pipe during operation, the service life of the flexible shaft transmission is short, the thinner the diameter of the steel core of the flexible shaft is, the softer the flexible steel core is, the larger the bending angle is, the smaller the transmitted force is, the more the wire is easy to break, and the transmission efficiency is low.

In view of this, the present inventors have made extensive conception on the defects and inconveniences caused by the imperfect structural design of the gear selecting and shifting mechanism, and have developed and designed the present application by actively researching, improving and trying on the defects and inconveniences.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a selection gearshift of wheeled excavator, simple structure, firm and can arrange in a flexible way in the driver's cabin, and transmission strength is big and the distance is far away, and transmission efficiency is high and keep off the position and switch smoothly, and longe-lived and with low costs.

In order to achieve the above purpose, the solution of the present invention is:

a gear selecting and shifting mechanism of a wheel excavator comprises an operating handle, a first gear shifting rod, a second gear shifting rod, a first gear selecting rod, a second gear selecting rod, a first middle rocker arm and a second middle rocker arm, wherein one end of the first gear shifting rod is connected with the operating handle through a first rod end bearing, and the other end of the first gear shifting rod is connected with the first middle rocker arm through a second rod end bearing; one end of the second gear shifting rod is connected with the first middle rocker arm through a third rod end bearing, and the other end of the second gear shifting rod is connected with the gearbox through a fourth rod end bearing; one end of the first gear selecting rod is connected with the operating handle through a fifth rod end bearing, and the other end of the first gear selecting rod is connected with the second middle rocker arm through a sixth rod end bearing; one end of the second gear selecting rod is connected with the second intermediate rocker arm through a seventh rod end bearing, and the other end of the second gear selecting rod is connected with the gearbox through an eighth rod end bearing; the first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are hard rods.

The first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are round steel with phi of 10 mm; two ends of the first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are respectively provided with positive threads and negative threads.

The first rod end bearing and the second rod end bearing are arranged in mutually perpendicular directions, and the fifth rod end bearing and the sixth rod end bearing are arranged in mutually perpendicular directions.

Operating handle passes through a base lock admittedly in driver's cabin lateral wall, rocking arm rotation pin joint is on the fixing base in the middle of first middle rocking arm and the second, the fixing base lock admittedly in driver's cabin lateral wall and driver's cabin lateral wall set up a window that supplies the middle rocking arm of first middle rocking arm, second to pass, first gear level, first selection gear level are located the inboard of driver's cabin lateral wall, second gear level, second selection gear level are located the outside of driver's cabin lateral wall.

The two ends of the fixed seat are fixedly locked on the side wall of the cab, and the middle of the fixed seat, the middle of the first middle rocker arm and the middle of the second middle rocker arm are rotatably pivoted together through a shaft.

The first middle rocker arm and the second middle rocker arm are long-strip blocks and are arranged in parallel up and down; the second rod end bearing and the third rod end bearing are rotatably pivoted at two ends of the outer side surface of the first middle rocker arm through shafts, and the sixth rod end bearing and the seventh rod end bearing are rotatably pivoted at two ends of the outer side surface of the second middle rocker arm through shafts.

The operating handle is provided with a first shaft hole positioned at the tail end of the operating handle and a second shaft hole which has a distance with the first shaft hole, a first shaft penetrates through the first shaft hole, the first shaft is pivoted with the bearing end of a first rod end bearing, and the rod end of the first rod end bearing is connected with one end of a first gear shifting rod; the second shaft hole is penetrated with a second shaft, the two ends of the second shaft are respectively pivoted with a bearing end of a ninth rod end bearing and a bearing end of a tenth rod end bearing, a rod end of the ninth rod end bearing is locked on the base, a rod end of the tenth rod end bearing is locked on a supporting rod, the upper end of the supporting rod is rotatably pivoted on the base, the lower end of the supporting rod is pivoted with a bearing end of a fifth rod end bearing through a shaft, and the rod end of the fifth rod end bearing is connected with one end of a first gear selecting rod.

The base has the fixed plate with the lock solid of driver's cabin lateral wall, the bottom plate of being connected with the fixed plate and sets up the support on the bottom plate, the support has the first curb plate that supplies ninth pole end bearing lock to establish and the second curb plate with the branch pin joint, just logical groove that supplies first gear level to pass is seted up to the bottom of first curb plate.

The utility model discloses a bearing support, including branch, second curb plate, first through-hole, second through-hole are located to the branch upper end, the second curb plate is provided with the second through-hole, and the both ends of a rotation axis are locked respectively and are located between branch and the second curb plate the axis of rotation winding has reset spring.

The ninth rod end bearing locked on the first side plate and the tenth rod end bearing locked on the support rod and positioned on the side edge of the second side plate are arranged in parallel; the first rod end bearing and the ninth rod end bearing are arranged in parallel up and down.

After the structure is adopted, the gear selecting and shifting mechanism of the wheel type excavator pulls or pushes the first gear shifting rod and the first gear selecting rod to move by operating the operating handle to move back and forth or left and right, further pulls or pushes the first middle rocker arm and the second middle rocker arm to move, and finally pulls or pushes the second gear shifting rod and the second gear selecting rod to move, so that the gear selecting and shifting function is realized; the first gear shifting rod, the second gear shifting rod and the first middle rocker arm are connected through rod end bearings to form a gear shifting rod, the first gear selecting rod, the second gear selecting rod and the second middle rocker arm are connected through rod end bearings to form a gear selecting rod, the gear shifting rod and the gear selecting rod are divided into two sections of hard rods and matched with the first middle rocker arm and the second middle rocker arm, and the gear shifting rod, the gear shifting rod and the gear selecting rod can be flexibly arranged in a cab; each connecting end is connected by a rod end bearing, so that the connecting precision is high, the virtual position of the whole power transmission process is very small, the transmission efficiency is high, and the gear switching is smooth; compared with the existing connecting structures such as welding or hinging, the structure is simpler and firmer, installation parts are reduced, the failure rate is low, the size is small, the weight is light, the service life is long, and the cost is low; and the advantage that the centering range of the rod end bearing is large is utilized, so that the transmission direction of the variable force can be changed by the gear lever and the gear selecting lever, the advantages of large transmission force and long distance of the hard lever are achieved, and the problem that the hard lever can only be directly used in transmission force and arrangement is solved.

Drawings

Fig. 1 is a first structural schematic diagram of a gear selecting and shifting mechanism of a wheel excavator according to the present invention;

fig. 2 is a second structural schematic diagram of the gear selecting and shifting mechanism of the wheel excavator of the present invention;

fig. 3 is a first schematic view of a connection structure between the operating handle and the first and second shift levers of the present invention;

fig. 4 is a schematic view of a connection structure between the operating handle and the first and second shift levers of the present invention.

Description of the symbols

Operating handle 1 first shift lever 21

Second gear shift lever 22 first gear shift lever 31

Second gear selector lever 32 first intermediate rocker arm 23

The second intermediate rocker arm 33 first rod end bearing 41

Second rod end bearing 42 third rod end bearing 43

Fourth rod end bearing 44 gearbox 5

Fifth rod end bearing 45 sixth rod end bearing 46

Seventh rod end bearing 47 eighth rod end bearing 48

Base 6 fixed seat 7

Cab sidewall 10 window 101

First shaft hole 11 and second shaft hole 12

First shaft 111 and second shaft 121

Ninth rod end bearing 49 tenth rod end bearing 40

Fixing plate 62 of strut 61

Base plate 63 and support 64

First side plate 641 and second side plate 642

Through groove 643 rotating shaft 611

Return spring 8L shaped plate 65.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.

Referring to fig. 1 to 4, the present invention discloses a gear selecting and shifting mechanism of a wheel excavator, which includes an operating handle 1, a first gear shifting lever 21, a second gear shifting lever 22, a first gear shifting lever 31, a second gear shifting lever 32, a first intermediate rocker arm 23 and a second intermediate rocker arm 33, wherein one end of the first gear shifting lever 21 is connected to the operating handle 1 through a first rod end bearing 41, and the other end is connected to the first intermediate rocker arm 23 through a second rod end bearing 42; one end of the second gear shifting rod 22 is connected with the first intermediate rocker arm 23 through a third rod end bearing 43, and the other end of the second gear shifting rod is connected with the gearbox 5 through a fourth rod end bearing 44; one end of the first gear selecting rod 31 is connected with the operating handle 1 through a fifth rod end bearing 45, and the other end of the first gear selecting rod is connected with the second intermediate rocker arm 33 through a sixth rod end bearing 46; one end of the second gear selecting rod 32 is connected with the second intermediate rocker arm 33 through a seventh rod end bearing 47, and the other end of the second gear selecting rod is connected with the gearbox 5 through an eighth rod end bearing 48; the first shift lever 21, the second shift lever 22, the first shift lever 31, and the second shift lever 32 are hard levers.

The gear selecting and shifting mechanism of the wheel type excavator pulls or pushes the first gear shifting rod 21 and the first gear selecting rod 31 to move by operating the operating handle 1 to move back and forth or left and right, and then pulls or pushes the first middle rocker arm 23 and the second middle rocker arm 33 to move, and finally pulls or pushes the second gear shifting rod 22 and the second gear selecting rod 32 to move, so that the gear selecting and shifting function is realized; the first gear shift lever 21, the second gear shift lever 21 and the first intermediate rocker arm 23 are connected through rod end bearings to form a gear shift lever, the first gear shift lever 31, the second gear shift lever 32 and the second intermediate rocker arm 33 are connected through rod end bearings to form a gear selection lever, and the gear shift lever and the gear selection lever are divided into two sections of hard levers and matched with the first intermediate rocker arm 23 and the second intermediate rocker arm 33, so that the gear shift lever, the second gear shift lever and the first intermediate rocker arm 23 can be flexibly arranged in a cab; each connecting end is connected by a rod end bearing, so that the connecting precision is high, the virtual position of the whole power transmission process is very small, the transmission efficiency is high, and the gear switching is smooth; compared with the existing connecting structures such as welding or hinging, the structure is simpler and firmer, installation parts are reduced, the failure rate is low, the size is small, the weight is light, the service life is long, and the cost is low; and the advantage that the centering range of the rod end bearing is large is utilized, so that the transmission direction of the variable force can be changed by the gear lever and the gear selecting lever, the advantages of large transmission force and long distance of the hard lever are achieved, and the problem that the hard lever can only be directly used in transmission force and arrangement is solved.

The first gear shift lever 21, the second gear shift lever 22, the first gear shift lever 31 and the second gear shift lever 32 of the utility model are round steel with the diameter of phi 10 mm; the first intermediate rocker arm 23 and the second intermediate rocker arm 33 can increase the integral supporting structure of the gear shift lever and the gear selection lever, and improve the rigidity of the gear shift lever and the gear selection lever for transmitting force; when the same force needs to be transmitted, compared with the prior whole gear lever and the gear selecting lever, the gear lever and the gear selecting lever connected in two sections of the utility model can use the hard lever with smaller diameter so as to reduce the cost; the round steel can solve the problems that the strength of the steel wire core of the flexible shaft is low, the steel wire core is easy to break by pulling, and the thicker the steel wire core is, the poorer the flexibility is; two ends of the first gear shifting rod 21, the second gear shifting rod 22, the first gear shifting rod 31 and the second gear shifting rod 32 are respectively provided with a positive thread and a negative thread, so that the quick adjustment and connection with the rod end bearing are facilitated.

In the present invention, the directions of the first rod end bearing 41 and the second rod end bearing 42 are perpendicular to each other, and the directions of the fifth rod end bearing 45 and the sixth rod end bearing 46 are perpendicular to each other; the gear shifting rod and the gear shifting rod can transmit power in a wider and more flexible direction.

The operating handle 1 of the present invention is locked to the cab sidewall 10 through a base 6, the first middle rocker arm 23 and the second middle rocker arm 33 are pivotally connected to the fixing base 7, the fixing base 7 is locked to the cab sidewall 10, and the cab sidewall 10 is provided with a window 101 for the first middle rocker arm 23 and the second middle rocker arm 33 to pass through, the first gear shift lever 21 and the first gear shift lever 31 are located inside the cab sidewall 10, and the second gear shift lever 22 and the second gear shift lever 32 are located outside the cab sidewall 10; the base 6, fixing base 7 can be with operating handle 1, first middle rocking arm 23 and the firm pin joint of second middle rocking arm 33 on the driver's cabin lateral wall, window 101 supplies first middle rocking arm 23, the middle rocking arm 33 of second to pass, can pass through gear level, select the gear level with operating handle 1 and gearbox 5 of driver's cabin interior outer and connect, arrange in a flexible way and compact structure.

In the utility model, two ends of the fixed seat 7 are fixedly locked on the side wall 10 of the cab, and the middle part of the fixed seat 7 and the middle parts of the first middle rocker arm 23 and the second middle rocker arm 33 are pivoted together through a shaft; when the first intermediate rocker arm 23 and the second intermediate rocker arm 33 are pulled or pushed by the first gear shift lever 21 and the first gear selection lever 31 respectively, the first intermediate rocker arm 23 and the second intermediate rocker arm 33 rotate around the shaft as a fulcrum, so that the second gear shift lever 22 and the second gear selection lever 32 are pulled or pushed to realize the gear selection and shifting functions.

The first intermediate rocker arm 23 and the second intermediate rocker arm 33 of the utility model are rectangular blocks which are arranged in parallel up and down; the second and third rod end bearings 42 and 43 are pivotally connected to the outer side surface of the first intermediate swing arm 23, and the sixth and seventh rod end bearings 46 and 47 are pivotally connected to the outer side surface of the second intermediate swing arm 33.

The utility model discloses an operating handle 1 is provided with the first shaft hole 11 that is located operating handle 1 end and has the second shaft hole 12 of interval with first shaft hole 11, first shaft 111 is worn to be equipped with in first shaft hole 11, first shaft 111 and the bearing end pivot of first rod end bearing 41, the rod end of first rod end bearing 41 is connected first gear level 21 one end; a second shaft 121 penetrates through the second shaft hole 12, two ends of the second shaft 121 are respectively pivoted with a bearing end of a ninth rod end bearing 49 and a bearing end of a tenth rod end bearing 40, a rod end of the ninth rod end bearing 49 is locked on the base 6, a rod end of the tenth rod end bearing 40 is locked on a supporting rod 61, the upper end of the supporting rod 61 is rotatably pivoted on the base 6, the lower end of the supporting rod 61 is pivoted with a bearing end of a fifth rod end bearing 45 through a shaft, and a rod end of the fifth rod end bearing 45 is connected with one end of a first gear selecting rod 31;

when the operating handle 1 is vertically positioned at the middle position, the operating handle 1 is in a neutral state, when the operating handle 1 is stressed to move forwards or backwards, the operating handle 1 rotates forwards and backwards by taking the second shaft 121 as a shaft, and the first rod end bearing 41 at the tail end of the operating handle 1 pulls or pushes the first gear shifting rod 21, the first middle rocker 23 and the second gear shifting rod 22 to move so as to realize a gear shifting function; when the operating handle 1 is forced to move leftwards or rightwards, the operating handle 1 rotates up and down by taking a pivot point between the second shaft 121 and the ninth rod end bearing 42 as a pivot, the tenth rod end bearing 40 can pull or push the support rod 61 to move forwards and backwards, and further pull or push the first gear selecting rod 31, the second middle rocker arm 33 and the second gear selecting rod 32 to move to realize the gear selecting function; for example, when the vehicle is to shift into the third gear or the fourth gear, the operating handle 1 can be directly pushed to move forwards or backwards, the operating handle 1 rotates forwards and backwards around the second shaft 121, and the first rod end bearing 41 at the tail end of the operating handle 1 pulls or pushes the first gear shifting rod 21, the first intermediate rocker arm 23 and the second gear shifting rod 22 to move, so that the vehicle is driven into the third gear or the fourth gear; when a vehicle needs to be shifted to a first gear, a second gear, a fifth gear or a reverse gear, firstly, the operating handle 1 is pushed to move leftwards or rightwards, the operating handle 1 rotates up and down by taking a pivot point between the second shaft 121 and the ninth rod end bearing 49 as a pivot, the tenth rod end bearing 40 can pull or push the supporting rod 61 to move forwards and backwards, and then the first gear selecting rod 31, the second middle rocker arm 33 and the second gear selecting rod 32 are pulled or pushed to move, so that gear selection is completed; and then the operating handle 1 is pushed to move forwards or backwards, so that the vehicle can finish the first gear, the second gear, the fifth gear or the reverse gear running.

The base 6 of the present invention has a fixing plate 62 locked with the cab sidewall 10, a bottom plate 63 connected with the fixing plate 62, and a support 64 disposed on the bottom plate 63, wherein the support 64 has a first side plate 641 for locking the ninth rod end bearing 49 and a second side plate 642 pivoted with the support rod 61, the fixing plate 62 is locked with the cab sidewall 10, the base 6 can be firmly fixed on the cab sidewall 10, and the installation of the gear selecting and shifting mechanism is firm, the support 64 is disposed to make the connection structure of the operating handle 1, the first gear shifting rod 21 and the first gear shifting rod 31 more firm, and the gear selecting and shifting movement is smoother; and a through groove 643 for allowing the first gearshift lever 21 to pass through is opened at the bottom end of the first side plate 641, and the through groove 643 facilitates the arrangement of the first gearshift lever 21.

In the utility model, a first through hole is arranged at the upper end of the supporting rod 61, a second through hole is arranged on the second side plate 642, the two ends of a rotating shaft 611 are respectively locked in the first through hole and the second through hole, and the rotating shaft 611 positioned in the space between the supporting rod 61 and the second side plate 642 is wound with a reset spring 8; when the operating handle 1 moves leftwards or rightwards, the tenth rod end bearing 40 pulls or pushes the support rod 61 to rotate forwards and backwards, and then stretches or compresses the return spring 8, so that when the operating handle 1 is to return to the neutral position, the operating handle 1 can be returned to the neutral position by means of the return spring 8, and the operation is more convenient.

The outer side of the second side plate 642 of the utility model is provided with an L-shaped plate 65, the L-shaped plate 65 is provided with a first plate which is attached to the outer side of the second side plate 642 and a second plate which extends to the support rod 61, and the middle part of the first plate is provided with a through hole which is sleeved on the rotating shaft 611; the reset spring 8 is matched with the L-shaped plate 65 to be arranged, so that the reset spring 8 can be conveniently stretched and reset.

The ninth rod end bearing 49 locked on the first side plate 641 and the tenth rod end bearing 40 locked on the support rod 61 and positioned at the side edge of the second side plate 642 are arranged in parallel; the first rod end bearing 41 and the ninth rod end bearing 49 are arranged in parallel up and down.

The utility model discloses a first gear level 21, second gear level 22, first gear level 31, second gear level 32's both ends are connected with rod end bearing's rod end respectively, and adopt bolted connection structure, simple structure and installation are convenient, firm.

The utility model discloses a first shaft hole 21 and second shaft hole 22 syntropy set up.

The above embodiments and drawings do not limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be considered as departing from the scope of the present invention.

Claims (10)

1. The utility model provides a gear selecting and shifting mechanism of wheeled excavator which characterized in that: the gear shifting mechanism comprises an operating handle, a first gear shifting rod, a second gear shifting rod, a first middle rocker arm and a second middle rocker arm, wherein one end of the first gear shifting rod is connected with the operating handle through a first rod end bearing, and the other end of the first gear shifting rod is connected with the first middle rocker arm through a second rod end bearing; one end of the second gear shifting rod is connected with the first middle rocker arm through a third rod end bearing, and the other end of the second gear shifting rod is connected with the gearbox through a fourth rod end bearing; one end of the first gear selecting rod is connected with the operating handle through a fifth rod end bearing, and the other end of the first gear selecting rod is connected with the second middle rocker arm through a sixth rod end bearing; one end of the second gear selecting rod is connected with the second intermediate rocker arm through a seventh rod end bearing, and the other end of the second gear selecting rod is connected with the gearbox through an eighth rod end bearing; the first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are hard rods.

2. The gear selecting and shifting mechanism of a wheeled excavator according to claim 1, wherein: the first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are round steel with phi of 10 mm; two ends of the first gear shifting rod, the second gear shifting rod, the first gear selecting rod and the second gear selecting rod are respectively provided with positive threads and negative threads.

3. The gear selecting and shifting mechanism of a wheeled excavator according to claim 1, wherein: the first rod end bearing and the second rod end bearing are arranged in mutually perpendicular directions, and the fifth rod end bearing and the sixth rod end bearing are arranged in mutually perpendicular directions.

4. The gear selecting and shifting mechanism of a wheeled excavator according to claim 1, wherein: operating handle passes through a base lock admittedly in driver's cabin lateral wall, rocking arm rotation pin joint is on the fixing base in the middle of first middle rocking arm and the second, the fixing base lock admittedly in driver's cabin lateral wall and driver's cabin lateral wall set up a window that supplies the middle rocking arm of first middle rocking arm, second to pass, first gear level, first selection gear level are located the inboard of driver's cabin lateral wall, second gear level, second selection gear level are located the outside of driver's cabin lateral wall.

5. The gear selecting and shifting mechanism of a wheeled excavator according to claim 4, wherein: the two ends of the fixed seat are fixedly locked on the side wall of the cab, and the middle of the fixed seat, the middle of the first middle rocker arm and the middle of the second middle rocker arm are rotatably pivoted together through a shaft.

6. The gear selection and shift mechanism for a wheeled excavator according to claim 5, wherein: the first middle rocker arm and the second middle rocker arm are long-strip blocks and are arranged in parallel up and down; the second rod end bearing and the third rod end bearing are rotatably pivoted at two ends of the outer side surface of the first middle rocker arm through shafts, and the sixth rod end bearing and the seventh rod end bearing are rotatably pivoted at two ends of the outer side surface of the second middle rocker arm through shafts.

7. The gear selecting and shifting mechanism of a wheeled excavator according to claim 4, wherein: the operating handle is provided with a first shaft hole positioned at the tail end of the operating handle and a second shaft hole which has a distance with the first shaft hole, a first shaft penetrates through the first shaft hole, the first shaft is pivoted with the bearing end of a first rod end bearing, and the rod end of the first rod end bearing is connected with one end of a first gear shifting rod; the second shaft hole is penetrated with a second shaft, the two ends of the second shaft are respectively pivoted with a bearing end of a ninth rod end bearing and a bearing end of a tenth rod end bearing, a rod end of the ninth rod end bearing is locked on the base, a rod end of the tenth rod end bearing is locked on a supporting rod, the upper end of the supporting rod is rotatably pivoted on the base, the lower end of the supporting rod is pivoted with a bearing end of a fifth rod end bearing through a shaft, and the rod end of the fifth rod end bearing is connected with one end of a first gear selecting rod.

8. The gear selection and shift mechanism for a wheeled excavator according to claim 7, wherein: the base has the fixed plate with the lock solid of driver's cabin lateral wall, the bottom plate of being connected with the fixed plate and sets up the support on the bottom plate, the support has the first curb plate that supplies ninth pole end bearing lock to establish and the second curb plate with the branch pin joint, just logical groove that supplies first gear level to pass is seted up to the bottom of first curb plate.

9. The gear selection and shift mechanism for a wheeled excavator of claim 8, wherein: the utility model discloses a bearing support, including branch, second curb plate, first through-hole, second through-hole are located to the branch upper end, the second curb plate is provided with the second through-hole, and the both ends of a rotation axis are locked respectively and are located between branch and the second curb plate the axis of rotation winding has reset spring.

10. The gear selection and shift mechanism for a wheeled excavator of claim 8, wherein: the ninth rod end bearing locked on the first side plate and the tenth rod end bearing locked on the support rod and positioned on the side edge of the second side plate are arranged in parallel; the first rod end bearing and the ninth rod end bearing are arranged in parallel up and down.

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