Pneumatic reversing mechanism of gearbox

Abstract

The utility model relates to the technical field of tractors, in particular to a pneumatic reversing mechanism of a gearbox, which provides stable power through a driving device, reduces the time difference required for switching different gears, provides stable power for the driving device through a fixing structure and a connecting structure, and improves the practicability of the device. Comprising a driving device, a fixing structure and a connecting structure, the fixing structure is installed on the driving device, and the connecting structure is installed on the driving device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tractor, in particular to a kind of pneumatic reversing mechanism of gearbox. BACKGROUND

[0002] Gearbox is the key component in vehicle power system, it adjusts the power transmission between engine and wheel by changing transmission ratio, to adapt to different driving conditions and driving requirements, gearbox pneumatic reversing is a kind of technology using pneumatic system to realize gearbox gear shifting;This technology controls the gear shifting mechanism inside gearbox by pneumatic device, to complete the switching between different gears;Gear shifting cylinder is usually installed inside gearbox, and gear shifting action is realized by the push of air pressure;The design and structure of gear shifting cylinder will be different according to the specific type and requirement of gearbox.

[0003] The prior art patent with the application number CN202022959629.2 of China utility model relates to a kind of pneumatic reversing mechanism of tractor gearbox, including reversing cover plate, mini cylinder, pneumatic solenoid valve, reversing shaft, reversing rocker arm, knob, spring and air pipe etc., can realize the switching of tractor gearbox forward, reverse gear, simple structure, easy to install, reduce the labor intensity of driver while reducing the operation skill requirement of driver.

[0004] But the above-mentioned device adopts single mini cylinder to carry out reversing control in actual use, and the extension and contraction time of cylinder will produce difference in long-term use process, the time required in cylinder contraction process gradually increases, and then the gear shifting process time difference appears, to affect the normal driving of operator. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a kind of pneumatic reversing mechanism of gearbox, which provides stable power by driving device, reduces the time difference required in switching different gears, provides stable power for driving device by fixed structure and connecting structure, improves the practicability of device.

[0006] The utility model relates to a kind of pneumatic reversing mechanism of gearbox;Including driving device, fixed structure and connecting structure, fixed structure is installed on driving device, connecting structure is installed on driving device;Provide stable power by driving device, reduce the time difference required in switching different gears, provide stable power for driving device by fixed structure and connecting structure, improve the practicability of device.

[0007] Preferably, the driving device comprises a fixed plate, a driving shaft, driving arms, a shaft sleeve connector, first cylinders and fixed shafts, the driving shaft is installed on the fixed plate through bearings, the upper and lower parts of the driving shaft are respectively sleeved with a group of driving arms, the directions of the two groups of driving arms are opposite, the ends of the driving arms are connected with the moving ends of the first cylinders through the shaft sleeve connector, the fixed ends of the two groups of first cylinders are respectively connected with the fixed plate through a group of fixed shafts, and the fixed shafts are connected with the fixed plate through bearings; the rotation of the driving shaft is driven by controlling the extension and retraction amounts of the two groups of first cylinders and cooperating with the two groups of driving arms, the driving is completed by cooperating with the two groups of first cylinders, the increase of the gear shifting time caused by the length difference of the extension and retraction of a single cylinder is reduced, and the stability and practicability of the device are improved.

[0008] Preferably, the fixed structure comprises pneumatic electromagnetic valves, connecting seats, nuts and connecting bolts, a group of rectangular holes are arranged on the fixed plate, the pneumatic electromagnetic valves are located in the rectangular holes of the fixed plate, the upper parts of the pneumatic electromagnetic valves are located on the upper side of the fixed plate, the lower parts of the pneumatic electromagnetic valves are located on the lower side of the fixed plate, a plurality of connecting seats are arranged on the side surfaces of the pneumatic electromagnetic valves, a plurality of nuts are arranged on the edges of the rectangular holes of the fixed plate, and the pneumatic electromagnetic valves are connected with the fixed plate by cooperating with the connecting seats and the nuts through a plurality of bolts; the pneumatic electromagnetic valves are fixed in the rectangular holes of the fixed plate, so that the pneumatic electromagnetic valves can simultaneously provide power for the first cylinders on the upper and lower sides of the fixed plate, and there is no need to additionally punch holes on the fixed plate, and the practicability of the equipment is improved.

[0009] Preferably, the connecting structure comprises following arms, three-way valves, air pipe joints, air holes, outer arc-shaped holes, inner arc-shaped holes and high-pressure hoses, rectangular grooves are arranged on the side surfaces of the pneumatic electromagnetic valves, a group of three-way valves are respectively installed on the output ends and the input ends of the pneumatic electromagnetic valves, the two groups of fixed shafts are fixedly connected with a group of following arms by extending through the fixed plate to the other side of the fixed plate, two groups of air pipe joints are arranged on the following arms, two groups of air holes are arranged in the following arms and communicate with the two groups of air pipe joints, inner arc-shaped holes and high-pressure hoses are respectively arranged on the fixed plate at positions corresponding to the air inlet and outlet positions of the two groups of first cylinders, the following arms are respectively provided with a group of air holes at positions corresponding to the inner arc-shaped holes and the high-pressure hoses, and the two groups of air holes are respectively connected with the air inlets and outlets on the first cylinders through a group of high-pressure hoses and are respectively connected with the two groups of air holes; the fixed ends of the first cylinders are connected with the following arms through the fixed shafts, so that the following arms are driven to rotate synchronously during the rotation of the first cylinders, the self extension and retraction of the high-pressure hoses due to relative displacement are reduced, the service life of the equipment is improved, the ports of the three-way valves installed on the pneumatic electromagnetic valves are connected with the air pipe joints on the two groups of following arms through high-pressure air pipes, the driving work of the first cylinders is completed by cooperating with the air holes in the following arms, the distribution of the high-pressure air pipes on the fixed plate is reduced by arranging the inner arc-shaped holes and the high-pressure hoses on the fixed plate, and the practicability of the device is improved.

[0010] Preferably, further comprising guide shaft support, the upper and lower end faces of the fixed plate are respectively provided with a group of guide shaft supports; the high-pressure air pipe connected between the three-way valve and the air pipe joint is guided through the guide shaft support, so that the air pipe is prevented from being distributed in disorder on the surface of the fixed plate and affecting the normal use of the equipment, and the practicability of the device is improved.

[0011] Preferably, further comprising a pressure sensor, the moving end of the first air cylinder is provided with the pressure sensor; the pressure on the moving end of the first air cylinder is monitored through the connecting seat on the moving end of the first air cylinder, so that the equipment is prevented from being damaged due to excessive pressure on the moving end of the first air cylinder, and the practicability and stability of the device are improved.

[0012] Compared with the prior art, the utility model has the advantages that: stable power is provided through the driving device, time difference required in switching different gears is reduced, the driving device is provided with stable power through the fixed structure and the connecting structure, and the practicability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the first axonometric structure schematic diagram of the utility model, and

[0014] Figure 2 It is the second axonometric structure schematic diagram of the utility model, and

[0015] Figure 3 It is the explosion structure schematic diagram of the utility model, and

[0016] Figure 4 It is the side view structure schematic diagram of the utility model, and

[0017] Figure 5 It is the local enlarged structure schematic diagram of the utility model, and

[0018] Markings in the drawings: 1, fixed plate, 2, driving shaft, 3, driving arm, 4, shaft sleeve connecting piece, 5, first air cylinder, 6, fixed shaft, 7, pneumatic electromagnetic valve, 8, connecting seat, 9, nut, 10, connecting bolt, 11, three-way valve, 12, air pipe joint, 13, air hole, 14, outer arc-shaped hole, 15, inner arc-shaped hole, 16, high-pressure hose, 17, guide shaft support, 18, pressure sensor, 19, following arm. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. EMBODIMENT

[0020] As Figure 1 ,Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The fixed structure is mounted on the driving device, and the connecting structure is mounted on the driving device;

[0021] First, the pneumatic electromagnetic valve 7 controls the distribution of high-pressure gas to control the extension and contraction of the two groups of first cylinders 5 through the three-way valve 11, the high-pressure air pipe, the following arm 19, and the high-pressure hose 16, thereby controlling the rotation process of the driving shaft 2. In the rotation process of the driving shaft 2, power is alternately provided by the extension of the two groups of first cylinders 5;

[0022] The driving device includes a fixed plate 1, a driving shaft 2, a driving arm 3, a shaft sleeve connecting piece 4, a first cylinder 5, and a fixed shaft 6. The driving shaft 2 is mounted on the fixed plate 1 through a bearing. The upper part and the lower part of the driving shaft 2 are respectively sleeved with a group of driving arms 3. The two groups of driving arms 3 are opposite in direction. The ends of the driving arms 3 are connected with the moving ends of the first cylinders 5 through the shaft sleeve connecting pieces 4. The fixed ends of the two groups of first cylinders 5 are respectively connected with the fixed plate 1 through a group of fixed shafts 6. The fixed shafts 6 are connected with the fixed plate 1 through bearings;

[0023] The fixed structure includes a pneumatic electromagnetic valve 7, a connecting seat 8, a nut 9, and a connecting bolt 10. The fixed plate 1 is provided with a group of rectangular holes. The pneumatic electromagnetic valve 7 is located in the rectangular hole of the fixed plate 1, and the upper part of the pneumatic electromagnetic valve 7 is located on the upper side of the fixed plate 1. The lower part of the pneumatic electromagnetic valve 7 is located on the lower side of the fixed plate 1. A plurality of connecting seats 8 are arranged on the side surface of the pneumatic electromagnetic valve 7. A plurality of nuts 9 are arranged on the edge of the rectangular hole of the fixed plate 1. The pneumatic electromagnetic valve 7 is connected with the fixed plate 1 by a plurality of bolts, connecting seats 8, and nuts 9;

[0024] The connecting structure includes a following arm 19, a three-way valve 11, an air pipe joint 12, a ventilation hole 13, an outer arc-shaped hole 14, an inner arc-shaped hole 15, and a high-pressure hose 16. A rectangular groove is arranged on the side surface of the pneumatic electromagnetic valve 7. A group of three-way valves 11 are respectively mounted on the output end and the input end of the pneumatic electromagnetic valve 7. The two groups of fixed shafts 6 are respectively fixedly connected with a group of following arms 19 by extending through the fixed plate 1 to the other side of the fixed plate 1. The following arm 19 is provided with two groups of air pipe joints 12. The following arm 19 is provided with two groups of ventilation holes 13 which are respectively communicated with the two groups of air pipe joints 12. The fixed plate 1 is provided with an inner arc-shaped hole 15 and a high-pressure hose 16 at positions corresponding to the air inlet and outlet of the two groups of first cylinders 5. The following arm 19 is provided with a group of ventilation holes at positions corresponding to the inner arc-shaped hole 15 and the high-pressure hose 16. The two groups of ventilation holes are respectively communicated with the air inlets and outlets of the first cylinders 5 through a group of high-pressure hoses 16 and are respectively communicated with the two groups of ventilation holes 13;

[0025] It also includes a guide shaft bracket 17. A group of guide shaft brackets 17 are respectively arranged on the upper and lower end faces of the fixed plate 1;

[0026] The pressure sensor 18 is installed on the moving end of the first cylinder 5;

[0027] The stable power is provided through the driving device, the time difference required in the process of switching different gears is reduced, the stable power is provided for the driving device through the fixing structure and the connecting structure, and the practicability of the device is improved.

[0028] As shown in Figures 1 to 5 The utility model discloses a gearbox's pneumatic reversing mechanism, when working, first pneumatic solenoid valve 7 controls the distribution of high pressure gas and cooperates with three -way valve 11, high pressure air pipe, following arm 19 and high pressure hose 16 to control the extension of two groups of first cylinder 5, thereby control the rotation process of drive shaft 2, in the rotation process of drive shaft 2, alternately provide power by two groups of first cylinder 5 elongation respectively.

[0029] The pneumatic solenoid valve 7, three -way valve 11, first cylinder 5 and pressure sensor 18 of the utility model discloses a gearbox's pneumatic reversing mechanism are purchased on the market, and the technical personnel in the industry only need to install and operate according to the use instruction book of its attached, and no creative labor is paid by the technical personnel in the field.

[0030] The above only is the preferred implementation of the utility model, and it should be pointed out that for the ordinary technical personnel in the technical field, on the premise of not departing from the technical principle of the utility model, can make a number of improvements and variations, and these improvements and variations also should be regarded as the protection range of the utility model.

Claims

1. A pneumatic reversing mechanism for a gearbox; characterised in that, The utility model relates to a kind of driving device, fixed structure and connecting structure, fixed structure is installed on driving device, connecting structure is installed on driving device;Driving device includes fixed plate (1), drive shaft (2), drive arm (3), shaft sleeve connecting piece (4), first cylinder (5) and fixed shaft (6), fixed plate (1) is installed with drive shaft (2) by bearing, the upper portion and the lower portion of drive shaft (2) are respectively equipped with a set of drive arm (3), two groups of drive arm (3) are opposite, the end of drive arm (3) is connected with the moving end of first cylinder (5) by shaft sleeve connecting piece (4), the fixed end of two groups of first cylinder (5) is connected with fixed plate (1) by a group of fixed shaft (6), and fixed shaft (6) is connected with fixed plate (1) by bearing.

2. A pneumatic shift mechanism for a gearbox as claimed in claim 1, characterised in that, Fixed structure includes pneumatic solenoid valve (7), connecting seat (8), nut (9) and connecting bolt (10), fixed plate (1) is provided with a group of rectangular holes, pneumatic solenoid valve (7) is located in the rectangular hole of fixed plate (1) and the upper portion of pneumatic solenoid valve (7) is located on the upper side of fixed plate (1), the lower portion of pneumatic solenoid valve (7) is located on the lower side of fixed plate (1), a plurality of connecting seats (8) are provided on the side of pneumatic solenoid valve (7), a plurality of nuts (9) are provided on the edge of the rectangular hole of fixed plate (1), and pneumatic solenoid valve (7) is connected with fixed plate (1) by a plurality of bolts, connecting seats (8) and nuts (9).

3. A pneumatic shift mechanism for a gearbox as claimed in claim 2, characterised in that, Connecting structure includes following arm (19), three-way valve (11), gas pipe joint (12), air hole (13), outer arc-shaped hole (14), inner arc-shaped hole (15) and high-pressure hose (16), rectangular groove is provided on the side of pneumatic solenoid valve (7), a group of three-way valves (11) are respectively installed on the output end and the input end of pneumatic solenoid valve (7), two groups of fixed shaft (6) are fixedly connected with a group of following arms (19) by extending to the other side of fixed plate (1) through fixed plate (1), two groups of gas pipe joints (12) are provided on following arm (19), two groups of air holes (13) are provided in following arm (19) and are communicated with two groups of gas pipe joints (12), respectively, inner arc-shaped hole (15) and high-pressure hose (16) are respectively provided on fixed plate (1) corresponding to the air inlet and outlet positions of two groups of first cylinders (5), following arm (19) is provided with a group of air holes corresponding to the positions where inner arc-shaped hole (15) and high-pressure hose (16) are located, two groups of air holes are communicated with the air inlets and outlets on first cylinder (5) by a group of high-pressure hoses (16) respectively and are communicated with two groups of air holes (13) respectively.

4. A pneumatic shift mechanism for a gearbox as claimed in claim 3, characterised in that, It further includes guide shaft bracket (17), and a group of guide shaft brackets (17) are respectively provided on the upper and lower end faces of fixed plate (1).

5. A pneumatic shift mechanism for a gearbox as claimed in claim 4, characterised in that, It further includes pressure sensor (18), and pressure sensor (18) is installed on the moving end of first cylinder (5).

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