CN118029482A

CN118029482A - Mechanical operating mechanism based on single shaft and skid-steer loader

Info

Publication number: CN118029482A
Application number: CN202410370314.4A
Authority: CN
Inventors: 魏勋利; 李志刚; 尹宗杰; 朱福平; 郭金港; 王起飞
Original assignee: Science and Technology Branch of XCMG
Current assignee: Science and Technology Branch of XCMG
Filing date: 2024-03-29
Publication date: 2024-05-14

Abstract

The invention discloses a mechanical operating mechanism based on a single shaft and a skid steer loader. The left traveling system is rotatably supported on the single-shaft system, and the control of the left traveling pump is realized by controlling the left traveling system; the right traveling system is rotatably supported on the single-shaft system, and the control of the right traveling pump is realized by controlling the right traveling system; the left pedal system is rotatably supported on the single-shaft system, and the lifting and falling actions of the movable arm of the whole vehicle are realized by controlling the left pedal system to drive the movable arm linkage valve rod of the multi-way valve; the bucket connecting valve rod of the multi-way valve is driven by controlling the right pedal system, so that the bucket collecting and tipping actions of the whole car bucket are realized. The invention greatly saves the use space, reduces the number of the transmission rods, and has the advantages of simple rod system, small idle stroke and compact structure.

Description

Mechanical operating mechanism based on single shaft and skid-steer loader

Technical Field

The invention relates to the field of compact skid-steer loaders, in particular to a compact skid-steer loader operating mechanism, and belongs to the technical field of engineering machinery.

Background

The compact slipping loader is one kind of small engineering machine with indoor operation as main material and capable of being used in and out of work place via building elevator. Because of the special use condition, the whole machine has small volume, compact structure and small available space inside the whole machine.

The control modes of the skid steer loader comprise hydraulic control, electric control and mechanical control, and the compact skid steer loader is mainly mechanical due to the special working condition of the compact skid steer loader. The existing mechanical control mechanism comprises a pull rod type driven by multiple connecting rods and a flexible shaft type driven by flexible shafts. However, because the compact skid steer loader has extremely limited space, and the bending radius and the fixed position of the flexible shaft have higher space dimension requirements, the requirements cannot be met, and therefore, the compact skid steer loader is realized by adopting a multi-connecting-rod mode. The pull rod type operating mechanism of the existing compact skid steer loader has the problems of large accumulated idle stroke, large occupied space, high failure rate and the like because of more connecting rods, more rotating shafts and long transmission path.

Disclosure of Invention

The invention aims to provide a mechanical control system based on a single shaft, which solves the problems of more connecting rods, long transmission path, large accumulated idle stroke, large space occupation and the like of the conventional compact sliding loader control mechanism.

The invention is realized according to the following technical scheme:

in a first aspect, the present invention provides a single-axis based mechanical steering mechanism comprising:

the single-shaft system mainly comprises a shaft and a bearing with a seat; the shaft can freely rotate relative to the frame in the bearing with the seat;

The walking system mainly comprises a handle, a handle rod, a pull rod and a reset mechanism; the handle drives the handle rod, the handle rod rotates around the shaft to drive the pull rod to move back and forth, so that the control of the traveling pump is realized, and the pull rod can automatically return to the middle position under the action of the reset mechanism;

The pedal system mainly comprises a fixed seat, a pedal and a pull rod; the pedal rotates on the fixed seat to drive the pull rod to move back and forth, so that on one hand, the movable arm linkage valve rod of the multi-way valve is driven, and on the other hand, the bucket linkage valve rod of the multi-way valve is driven.

In some embodiments, the walking system comprises:

The left walking system comprises a left handle, a left handle rod, a left pull rod, a left reset mechanism and a pump fixing seat; the left handle drives a left handle rod, the left handle rod rotates around the shaft through a welding sleeve on the left handle rod to drive a left pull rod to move back and forth, the left pull rod realizes the control of a left traveling pump through a pump fixing seat, and the left pull rod can automatically return to the middle position under the action of the left reset mechanism;

The right walking system comprises a right handle, a right handle rod, a right pull rod, a right reset mechanism and a pump fixing seat; the right handle rod rotates around the shaft through a welding sleeve on the right handle rod, the right pull rod is driven to move back and forth, the right pull rod controls a right walking pump through the pump fixing seat, and the right pull rod can automatically return to the middle position under the action of the right reset mechanism.

In some embodiments, the left handle bar comprises:

The top of the bending rod is provided with threads for assembling the left handle;

The welding sleeve is arranged at the bottom of the bending rod, and is arranged on the shaft and is in clearance fit with the shaft;

and the rod I with the threaded hole is arranged on the welding sleeve and is used for connecting the left pull rod.

In some embodiments, the left pull rod comprises:

A left rod, one end of which is provided with a long thread;

the pair of mounting nuts and the baffle plate combination are respectively arranged at two ends of the long thread and are used for connecting the reset mechanism;

The pair of fish-eye joints are in spherical hinge connection and are respectively arranged at two ends of the left rod, the fish-eye joint far away from the long thread is arranged on the thread of the rod I, and the fish-eye joint near the long thread is connected with the pump fixing seat.

In some embodiments, the right handle bar comprises:

the top of the bending rod is provided with threads for assembling the right handle;

And the rod II with the threaded hole is arranged on the welding sleeve and is used for connecting the right pull rod.

In some embodiments, the right pull rod comprises:

a right rod, both ends of which are provided with long threads;

the pair of mounting nuts and the baffle plate combination are respectively arranged on long threads on two sides and are used for connecting the reset mechanism;

And the pair of fish-eye joints are in spherical hinge joint and are respectively positioned at two ends of the right rod, one of the fish-eye joints is installed on the thread of the rod II, and the other fish-eye joint is connected with the pump fixing seat.

In some embodiments, the left reset mechanism and the right reset mechanism are basically consistent in shape and are composed of a reset seat and two reset springs; the two return springs are arranged in the step sleeve of the return seat and are separated by the middle partition plate in the step sleeve; the rod part of the left pull rod or the right pull rod passes through the two return springs, and the two baffle plates on the rod part are matched with the return springs between the two baffle plates for use, so that the left pull rod or the right pull rod can realize automatic return when moving forwards and backwards.

In some embodiments, the pump fixing seat comprises a seat I and a seat II, wherein the seat I and the seat II are respectively provided with a V-shaped opening, the V-shaped openings of the seat I and the seat II are clamped on a square column of the traveling pump, and the seat I and the seat II are fastened by bolts; the seat II is provided with a mounting threaded hole, and the fish eye joint of the left pull rod or the right pull rod is mounted on the threaded hole on the seat II.

In some embodiments, the pedal system includes:

The left pedal system comprises a left pedal fixing seat, a left pedal pull rod, a left pedal sleeve and a fork pin; the left pedal rotates on the left pedal fixing seat to drive the left pedal pull rod to move back and forth, the left pedal pull rod drives the left pedal sleeve to rotate on the shaft, and the left pedal sleeve drives the movable arm linkage valve rod of the multi-way valve through the fork pin;

the right pedal system comprises a right pedal fixing seat, a right pedal pull rod and a fork pin; the right pedal drives the right pedal pull rod to move back and forth by rotating on the right pedal fixing seat, and the right pedal pull rod drives the bucket connecting valve rod of the multi-way valve through the fork pin.

In some embodiments, the left tread sleeve comprises:

the connecting rod is arranged in parallel with the shaft, and the length of the connecting rod is smaller than that of the shaft;

The sleeve I and the sleeve II are respectively arranged at two ends of the connecting rod, and are arranged on the shaft in a clearance fit manner;

The connecting rod I is arranged on the sleeve I and is used for being connected with the left pedal pull rod;

the connecting rod II is arranged on the sleeve II and is connected with one end of the fork pin, and the other end of the fork pin is connected with a movable arm linkage valve rod of the multi-way valve.

In some embodiments, the left pedal lever comprises:

A pull rod I;

And the pair of fish-eye joints are in spherical hinge joint, are respectively arranged at two ends of the pull rod I, one of the fish-eye joints is arranged on the left pedal, and the other fish-eye joint is arranged on the connecting rod I.

In some embodiments, the right foot rest lever comprises:

One end of the pull rod II is connected with the fork pin;

And the fish-eye joint is in spherical hinge connection and is arranged at the other end of the pull rod II, and the fish-eye joint is arranged on the right pedal.

In a second aspect, the present invention provides a skid steer loader incorporating the single axis based mechanical steering mechanism described above.

Compared with the prior art, the invention has the following beneficial effects:

The invention provides a mechanical operating mechanism based on a single shaft, which is characterized in that a left handle rod, a right handle rod and a left pedal sleeve share the same shaft, and motion transmission is completed by rotating around the shaft, so that the whole machine function is realized, the use space is greatly saved, the number of transmission rods is reduced, and the mechanical operating mechanism has the advantages of simple rod system, small idle stroke and compact structure.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.

In the drawings:

FIG. 1 is a schematic view of a mechanical steering mechanism of the present invention;

FIG. 2 is a schematic view of a left handle bar and a right handle bar of the present invention (a being the left handle bar, b being the right handle bar);

FIG. 3 is a schematic view of a left tread sleeve of the present invention;

FIG. 4 is a schematic diagram of a left reset mechanism according to the present invention;

FIG. 5 is a schematic diagram of a left pull rod and a right pull rod of the present invention (a is a left pull rod, b is a right pull rod);

fig. 6 is a schematic view of a pump holder according to the present invention.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in FIG. 1, a single-axis based mechanical steering mechanism is primarily used in compact skid steer loaders. Comprises a single-shaft system, a left walking system, a right walking system, a left pedal system and a right pedal system. The left traveling system is rotatably supported on the single-shaft system, and the control of the left traveling pump is realized by controlling the left traveling system; the right traveling system is rotatably supported on the single-shaft system, and the control of the right traveling pump is realized by controlling the right traveling system; the left pedal system is rotatably supported on the single-shaft system, and the lifting and falling actions of the movable arm of the whole vehicle are realized by controlling the left pedal system to drive the movable arm linkage valve rod of the multi-way valve; the bucket connecting valve rod of the multi-way valve is driven by controlling the right pedal system, so that the bucket collecting and tipping actions of the whole car bucket are realized. The invention greatly saves the use space, reduces the number of the transmission rods, and has the advantages of simple rod system, small idle stroke and compact structure.

The above-described uniaxial system is further described below.

With continued reference to FIG. 1, the single shaft system includes a shaft 1, a seated bearing 2. The two ends of the shaft 1 are respectively provided with a bearing 2 with a seat, and the bearing 2 with a seat is arranged on the frame. The axle 1 is freely rotatable in relation to the frame in a seated bearing 2.

The left traveling system described above is further described below.

As shown in fig. 1, 2, 4, 5 and 6, the left traveling system includes a left handle 3, a left handle lever 4, a left pull rod 5, a left reset mechanism 6 and a pump fixing base 7. One end of the left handle bar 4 is provided with a screw thread 4a, and the left handle 3 is screw-mounted to the upper portion of the left handle bar 4. The middle of the left handle rod 4 is provided with a welding sleeve 4b, the welding sleeve 4b in the left handle rod 4 is arranged on the shaft 1, the welding sleeve 4b of the left handle rod 4 is provided with a grease nipple 4c, the welding sleeve 4b is in clearance fit with the shaft 1, the matching part of the shaft 1 and the welding sleeve 4b of the left handle rod 4 is lubricated by the grease nipple 4c, the left handle rod 4 can freely rotate around the shaft 1, and the other end of the left handle rod 4 is provided with a rod I4 d with a threaded hole.

The left pull rod 5 comprises a left rod 5a, a mounting nut 5b, a baffle 5c and a fish-eye joint 5d. The fish eye joint 5d is in spherical hinge joint, can freely rotate within a certain angle range, and two ends of the left rod 5a are respectively provided with the fish eye joint 5d. A fish eye joint 5d at one end of the left lever 5a is mounted on the screw thread of the lever I4 d of the left handle lever 4. The left rod 5a is provided with a long thread, and a mounting nut 5b and a baffle 5c are arranged at the long thread of the left rod.

The left reset mechanism 6 comprises a left reset seat 6a and reset springs 6b, wherein the reset springs 6b are respectively arranged in a step sleeve of the left reset seat 6a, and the two reset springs 6b are separated by the middle part of the step sleeve. The left rod 5a passes through the step sleeve of the left reset seat 6a, and can realize automatic reset when the left rod 5a moves back and forth under the action of the baffle 5c and the reset spring 6 b.

The pump fixing seat 7 comprises a seat I7 a and a seat II 7b, wherein the seat I7 a and the seat II 7b are respectively provided with a V-shaped opening, the V-shaped openings of the seat I7 a and the seat II 7b are clamped on a square column of the pump, and the V-shaped openings are fastened by bolts. The seat II 7b is provided with a mounting threaded hole, and a fisheye joint at one end with long threads on the left pull rod 5 is mounted on the threaded hole on the seat II 7 b.

From the above, the left handle 3 drives the left handle rod 4, the left handle rod 4 rotates around the shaft 1 through the welding sleeve 4b on the left handle rod 4 to drive the left pull rod 5 to move back and forth, and the left pull rod 5 controls the left walking pump through the pump fixing seat 7. The left return mechanism 6 returns the left handle 3 to the neutral position when no external force is applied.

The right traveling system described above is further described below.

As shown in fig. 1, 2, 4, 5 and 6, the right traveling system includes a right handle 8, a right handle lever 9, a right tie rod 10, a right return mechanism 11 and a pump fixing base 7. One end of the right handle bar 9 is provided with a screw thread 9a, and the right handle 8 is screw-mounted to the upper portion of the right handle bar 9. The middle of the right handle rod 9 is provided with a welding sleeve 9b, the welding sleeve 9b in the right handle rod 9 is arranged on the shaft 1, the welding sleeve 9b of the right handle rod 9 is provided with a grease nipple 4c, the welding sleeve 9b is in clearance fit with the shaft 1, the matching part of the shaft 1 and the welding sleeve 9b of the right handle rod 9 is lubricated by the grease nipple 4c, and the right handle rod 9 can freely rotate around the shaft 1. The other end of the right handle lever 9 is a threaded hole lever II 9c.

The right tie rod 10 includes a right rod 10a, a mounting nut 5b, a baffle 5c, and a fish-eye joint 5d. The fish eye joint 5d is a spherical hinge and can freely rotate within a certain angle range, and two ends of the right rod 10a are respectively provided with the fish eye joint 5d. The fish eye joint 5d at one end of the right lever 10a is mounted on the screw thread of the lever II 9c of the right handle lever 9. The right rod 10a is provided with long threads at two ends, and the long threads of the right rod 10a are provided with a mounting nut 5b and a baffle 5c.

The right reset mechanism 11 comprises a right reset seat 11a and reset springs 6b, wherein the reset springs 6b are respectively arranged in a step sleeve of the right reset seat 11a, and the two reset springs 6b are separated by the middle part of the step sleeve. The right rod 10a passes through the step sleeve of the right reset seat 11a, and can realize automatic reset when the right rod 10a moves back and forth under the action of the baffle 5c and the reset spring 6 b.

The pump fixing seat 7 comprises a seat I7 a and a seat II 7b, wherein the seat I7 a and the seat II 7b are respectively provided with a V-shaped opening, the V-shaped openings of the seat I7 a and the seat II 7b are clamped on a square column of the pump, and the V-shaped openings are fastened by bolts. The seat II 7b is provided with a mounting threaded hole, and a fish eye joint at one end of the right pull rod 10 is mounted on the threaded hole of the seat II 7 b.

From the above, the right handle 8 drives the right handle rod 9, the right handle rod 9 rotates around the shaft 1 through the welding sleeve 9b on the right handle rod 9 to drive the right pull rod 10 to move back and forth, and the right pull rod 10 controls the right walking pump through the pump fixing seat 7. The right return mechanism 11 returns the right handle 8 to the neutral position when no external force is applied.

The left pedal system described above is further described below.

As shown in fig. 1 and 3, the left pedal system includes a left pedal fixing base 12, a left pedal 13, a left pedal rod 14, a left pedal sleeve 15, and a fork pin 16. The left pedal 13 is hinged on the left pedal fixing seat 12, and the left pedal fixing seat 12 is fixedly arranged on the frame. The left pedal sleeve 15 is provided with a sleeve I15 a, a sleeve II 15b, a connecting rod I15 c and a connecting rod II 15d, the sleeve I15 a and the sleeve II 15b of the left pedal sleeve 15 are provided with a grease nipple 4c, the grease nipple passes through the shaft 1, the sleeve I15 a and the sleeve II 15b are in clearance fit with the shaft 1, the matching parts of the shaft 1 and the sleeve I15 a and the sleeve II 15b of the left pedal sleeve 15 are lubricated by the grease nipple 4c, and the left pedal sleeve 15 can freely rotate around the shaft 1.

The left pedal pull rod 14 comprises a pull rod I14 a and a fish eye joint 5d, the fish eye joint 5d is in spherical hinge joint and can freely rotate within a certain angle range, two ends of the pull rod I14 a are respectively provided with one fish eye joint 5d, one end of the left pedal pull rod 14 is connected with the left pedal 13, and the other end of the left pedal pull rod 14 is connected with a connecting rod I15 c of the left pedal sleeve 15 through the fish eye joint 5 d. One end of a fork pin 16 is arranged on a connecting rod II 15d of the left pedal sleeve 15, and the other end of the fork pin 16 is connected with a movable arm linkage rod of the multi-way valve.

The left pedal 13 rotates on the left pedal fixing seat 12 to drive the left pedal pull rod 14 and the left pedal sleeve 15, and the fork pin 16 drives the movable arm linkage valve rod of the multi-way valve to realize the lifting and falling actions of the movable arm of the whole vehicle.

The right pedal system described above is further described below.

As shown in fig. 1, the right pedal system includes a right pedal fixing base 17, a right pedal 18, a right pedal pull rod 19, and a fork pin 16. The right pedal pull rod 19 comprises a pull rod II 19a and a fish eye joint 5d, wherein the fish eye joint 5d is arranged at one end of the right pedal pull rod, the fish eye joint 5d is in spherical hinge joint and can freely rotate within a certain angle range, the fish eye joint 5d at one end of the right pedal pull rod 19 is connected with a right pedal 18, a fork pin 16 is arranged at the other end of the right pedal pull rod 19, and the fork pin 16 on the right pedal pull rod 19 is connected to a bucket connecting valve rod of the multi-way valve.

The right pedal 18 rotates on the right pedal fixing seat 17 to drive the right pedal pull rod 19 to drive the bucket connecting valve rod of the multi-way valve, so that the bucket collecting and tipping actions of the whole car bucket are realized.

In summary, the invention provides a mechanical operating mechanism based on a single shaft, wherein the left handle rod 4, the right handle rod 9 and the left pedal sleeve 15 share the same shaft 1, and the motion transmission is completed around the rotation of the left handle rod 4, the right handle rod 9 and the left pedal sleeve, so that the whole machine function is realized, the space is greatly saved, the number of transmission rod systems is reduced, and the mechanical operating mechanism has small idle stroke and compact structure.

The invention also provides a skid steer loader, which is provided with the mechanical operating mechanism based on the single shaft.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the application and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present application.

The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any simple modification, equivalent variation and variation of the above embodiments according to the technical matter of the present invention without departing from the scope of the invention.

Claims

1. A single-axis based mechanical steering mechanism, comprising:

2. The mechanical single-axis based steering mechanism of claim 1, wherein the travel system comprises:

3. A single-axis based mechanical steering mechanism according to claim 2, wherein:

the left handle lever includes:

a rod I with a threaded hole is arranged on the welding sleeve and is used for connecting the left pull rod;

The left pull rod includes:

A left rod, one end of which is provided with a long thread;

4. A single-axis based mechanical steering mechanism according to claim 2, wherein:

the right handle lever includes:

the rod II with the threaded hole is arranged on the welding sleeve and is used for connecting the right pull rod;

the right pull rod includes:

a right rod, both ends of which are provided with long threads;

5. A single-axis based mechanical steering mechanism according to claim 2, wherein:

The left reset mechanism and the right reset mechanism are basically consistent in shape and are composed of a reset seat and two reset springs;

the two return springs are arranged in the step sleeve of the return seat and are separated by the middle partition plate in the step sleeve;

the rod part of the left pull rod or the right pull rod passes through the two return springs, and the two baffle plates on the rod part are matched with the return springs between the two baffle plates for use, so that the left pull rod or the right pull rod can realize automatic return when moving forwards and backwards.

6. A single-axis based mechanical steering mechanism according to claim 2, wherein:

The pump fixing seat comprises a seat I and a seat II, wherein the seat I and the seat II are respectively provided with a V-shaped opening, the V-shaped openings of the seat I and the seat II are clamped on a square column of the traveling pump, and the seat I and the seat II are fastened by bolts;

The seat II is provided with a mounting threaded hole, and the fish eye joint of the left pull rod or the right pull rod is mounted on the threaded hole on the seat II.

7. The single-axis based mechanical operating mechanism of claim 1, wherein the pedal system comprises:

8. A single-axis based mechanical manipulating mechanism according to claim 7, wherein:

The left pedal sleeve comprises:

The connecting rod II is arranged on the sleeve II and is connected with one end of the fork pin, and the other end of the fork pin is connected with a movable arm linkage valve rod of the multi-way valve;

the left pedal pull rod includes:

a pull rod I;

9. A single-axis based mechanical manipulating mechanism according to claim 7, wherein:

The right pedal pull rod includes:

One end of the pull rod II is connected with the fork pin;

10. A skid steer loader, characterized by:

a single-axis based mechanical steering mechanism as claimed in any one of claims 1 to 9 is installed.