CN110030375A - A kind of reversing gear - Google Patents

Abstract

The invention discloses a reversing control mechanism, which comprises a control rod, a longitudinal bevel gear, a transverse bevel gear, a rocker, a flexible shaft, a flexible shaft sheath and a connecting fork. The reversing control mechanism of the present invention converts the front and rear motion of the joystick into the left and right motion of the flexible shaft by using the bevel gear set. Smaller and larger friction force with the flexible shaft sheath, which makes the operation more light and flexible.

Description

A reversing control mechanism

technical field

The invention belongs to the technical field of machinery, and in particular relates to a reversing control mechanism.

Background technique

Construction machinery and vehicles usually work for a long time, and operating comfort is very important. Existing construction machinery and vehicles usually use a flexible shaft type reversing control mechanism. Generally, the flexible shaft type switching control mechanism includes a joystick and a control box, wherein the control box includes a rocker connected to the joystick, a flexible shaft and a flexible shaft guard. A sleeve and a connecting fork connected to the hinge center. The front and rear joysticks drive the rocker in the control box to swing up and down, and the flexible shaft connected to the rocker moves up and down in the flexible shaft sheath under the push and pull of the rocker. It is fixed and plays the role of guidance and protection. The connecting fork connected to the front end of the flexible shaft moves forward and backward under the action of the flexible shaft. Since the thrust of the rocker needs to be converted into the downward movement of the flexible shaft, the flexible shaft usually has a certain rigidity. If the bending radius of the flexible shaft is small, the rigid flexible shaft will generate a large internal friction force in the sheath at this position, which will lead to an increase in the operating force of the joystick, reduce the operating comfort, and easily protect the flexible shaft. Sleeve and flexible shaft cause wear. Therefore, it is necessary to develop a better reversing control mechanism to prolong its service life and improve the comfort of operation.

SUMMARY OF THE INVENTION

In order to solve the defects of the prior art such as laborious manipulation and easy wear, the present invention provides a light and flexible reversing manipulation mechanism.

The technical scheme adopted by the present invention is: a reversing control mechanism, comprising a joystick, a longitudinal bevel gear, a transverse bevel gear, a rocker, a flexible shaft, a flexible shaft sheath and a connecting fork. The longitudinal bevel gear and the transverse bevel gear are movably connected, the joystick is fixedly mounted on the outer side of the longitudinal bevel gear, and the rocker is fixedly mounted on the outer side of the transverse bevel gear. The flexible shaft is installed in a fixed flexible shaft sheath, connected with the rocker, and the connecting fork is arranged at the end of the flexible shaft; the flexible shaft moves up and down in the flexible shaft sheath, so The flexible shaft sheath plays the role of guiding and protecting the flexible shaft. The flexible shaft is connected with the center of the whole machine through the connecting fork, so as to control the mechanical reversal.

As a specific solution of the present invention, the rocker is mounted on the transverse bevel gear through a bearing; the longitudinal bevel gear and the transverse bevel gear are vertically arranged. Preferably, the diameter of the longitudinal bevel gear is larger than the diameter of the transverse bevel gear.

When changing direction, the front and rear manipulate the joystick to drive the longitudinal bevel gear to rotate forward and backward, while the transverse bevel gear rotates left and right, which drives the rocker mounted on the transverse bevel gear to rotate left and right. Under the pushing and pulling force of the rocker, the flexible shaft in the flexible shaft sheath starts to move up and down along the tangential direction of the rocker, and the flexible shaft sheath is fixed and plays the role of guidance and protection. The connecting fork connected to the front end of the flexible shaft moves forward and backward under the action of the flexible shaft. The flexible shaft with a certain rigidity has no bending at all when passing through the bottom plate, and moves smoothly without generating internal friction, which makes the operation more labor-saving.

The reversing control mechanism of the present invention changes the direction of the flexible shaft through the bottom plate through the bevel gear, so that the flexible shaft with a certain rigidity will not generate a large internal friction force due to bending at the bottom plate, so that the operation is lighter and more convenient. It is flexible, improves the comfort of operation, and avoids damage to the operating system due to friction, which greatly reduces its service life.

Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The reversing control system of the present invention can automatically adjust the direction of the flexible shaft through the design of the bevel gear, so as to ensure that the flexible shaft passes in a direction substantially tangential to the rocker. The bottom plate and the center of the whole machine avoid the laborious operation caused by the small bending radius of the flexible shaft, and the operation is lighter and more flexible, and the operation comfort is improved.

(2) The reversing control system of the present invention avoids excessive friction between the flexible shaft and the flexible shaft sheath, which saves effort and greatly delays its wear, thereby prolonging its service life.

(3) The reversing control system of the present invention has a simple structure and strong operability, is suitable for various construction machinery, and is suitable for industrialization and popularization and application.

Description of drawings

1 is a schematic diagram of the overall structure of a reversing control system in the prior art;

Fig. 2 is the operation schematic diagram of the reversing control system of the prior art;

Fig. 3 is the three-dimensional structure schematic diagram of the reversing control system of the present invention;

4 is a schematic diagram of the movement of the flexible shaft of the reversing control system of the present invention;

Fig. 5 is the operation schematic diagram of the reversing control system of the present invention;

Among them, 1- joystick, 2- control box, 3- rocker, 4- flexible shaft, 5- flexible shaft sheath, 6- connecting fork, 21- longitudinal bevel gear, 22- transverse bevel gear, 23- bearing.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the structural principle of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

As shown in Figures 1 and 2, a schematic diagram of the overall structure of the central flexible shaft reversing operating mechanism in the prior art. Taking a loader as an example, the reversing mechanism usually passes through the hinge center and then leads to the front frame. The flexible shaft type reversing operating mechanism includes a joystick 1, a manipulation box 2 and a hinge center, wherein the manipulation box 2 includes a rocker 3 connected with the joystick 1, a flexible shaft 4, a flexible shaft sheath 5, and a The connecting fork 6 connected to the hinge center; the direction of the flexible shaft 4 at the bottom of the cab is first to the left (Fig. 1) to the hinge center, and then forward after passing through the hinge center (Fig. 2). From the bottom plate to the hinge center, the flexible shaft 4 The bending radius is small, and the flexible shaft is pinned at the base plate due to the existence of a certain rigidity.

As shown in Fig. 2, when reversing, the joystick 1 is manipulated front and rear to drive the manipulation, the rocker 3 in 2 swings up and down, and the flexible shaft 4 connected with the rocker 3 acts on the push and pull of the rocker 3. Down, move up and down in the flexible shaft sheath 5, the flexible shaft sheath 5 is fixed and plays the role of guiding and protection, the connecting fork 6 connected to the front end of the flexible shaft 4 moves forward and backward under the action of the flexible shaft 4 . Since the thrust of the rocker 3 needs to be converted into the up and down movement of the flexible shaft 4, the flexible shaft 4 usually has a certain rigidity. If the bending radius of the flexible shaft 4 is small, the rigid flexible shaft 4 will generate a large internal friction force in the flexible shaft sheath 5 at this position, which will lead to an increase in the operating force of the joystick 1 and reduce the operating comfort. It is also easy to cause wear to the flexible shaft sheath 5 and the flexible shaft 4, shortening their service life.

As shown in Figures 3-5, the reversing control mechanism of the present invention includes a joystick 1, a longitudinal bevel gear 21, a transverse bevel gear 22, a bearing 23, a rocker 3, a flexible shaft 4, a flexible shaft sheath 5 and a connecting fork 6. The longitudinal bevel gear 21 and the transverse bevel gear 22 are movably connected to each other, the joystick 1 is fixedly installed on the outer side of the longitudinal bevel gear 21, and the rocker 3 is fixedly installed at the outer side of the transverse bevel gear 22 through the bearing 23; The shaft 4 is installed in the fixed flexible shaft sheath 5, connected with the rocker 3, and the connecting fork 6 is arranged at the end of the flexible shaft 4; the flexible shaft 4 is on the flexible shaft sheath 5, Down movement, the flexible shaft sheath 5 plays the role of guidance and protection. The flexible shaft 4 is connected with the center of the whole machine through the connecting fork 6, so as to control the mechanical reversal.

As shown in Figures 3 and 4, when the direction is reversed, the front and rear manipulate the joystick 1 to drive the longitudinal bevel gear 21 to rotate forward and backward, while the lateral bevel gear 22 rotates left and right, driving the rocker mounted on the lateral bevel gear 22. Rod 3 rotates left and right. Under the pushing and pulling force of the rocker 3, the flexible shaft 4 in the flexible shaft sheath 5 starts to move up and down along the tangential line of the rocker 3, and the flexible shaft sheath 5 is fixed and plays the role of guidance and protection. The connecting fork 6 connected to the front end of the flexible shaft 4 moves forward and backward under the action of the flexible shaft 4, thereby realizing mechanical reversal. As shown in Fig. 4, the flexible shaft 4 with a certain rigidity hardly bends when passing through the bottom plate, and moves smoothly, which greatly reduces the internal friction force and makes the operation more labor-saving.

The reversing control mechanism of the present invention changes the direction of the flexible shaft through the bottom plate through the bevel gear, so that the flexible shaft with a certain rigidity will not generate a large internal friction force due to bending at the bottom plate, so that the operation is lighter and more convenient. It is flexible, improves the comfort of operation, and avoids damage to the operating system due to friction, which greatly reduces its service life.

The above descriptions are only preferred embodiments of the present invention, but should not be construed as limiting the protection scope of the present invention. It should be pointed out that, for those skilled in the art, all equivalent changes and modifications made without departing from the concept of the present invention should be included in the scope of protection of the present invention.

Claims (5)

1. a kind of reversing gear, it is characterised in that: including control stick, longitudinal bevel gear, lateral bevel gear, rocking bar, flexible axle, Flexible axle sheath and connecting fork；

The longitudinal direction bevel gear and lateral bevel gear are flexibly connected, and the control stick is fixedly mounted on the outside of longitudinal bevel gear；Institute Rocking bar is stated to be fixedly mounted on the outside of the lateral bevel gear；

The flexible axle is mounted in the flexible axle sheath of fixed setting, is connect with the rocking bar, and the connecting fork is arranged described soft Shaft end；

The flexible axle moves above and below in flexible axle sheath, and the flexible axle sheath plays a part of to be oriented to and protect to the flexible axle.

2. reversing gear as described in claim 1, it is characterised in that: the rocking bar is fixedly connected on described by bearing On lateral bevel gear.

3. reversing gear as described in claim 1, it is characterised in that: the longitudinal direction bevel gear and the lateral bevel gear It is vertically arranged.

4. reversing gear as described in claim 1, it is characterised in that: the diameter of the longitudinal direction bevel gear is greater than the cross To the diameter of bevel gear.

5. reversing gear according to any one of claims 1-4, it is characterised in that: forward and backward manipulation control stick drives vertical To the forward and backward rotation of bevel gear, while lateral bevel gear generates left and right rotation, drive the rocking bar being mounted on lateral bevel gear it is left, Right rotation；Under the push and draw force effect of rocking bar, the flexible axle in flexible axle sheath starts to move above and below along rocking bar tangential direction, soft Sheath shaft is fixed, plays a part of to be oriented to and protect；The connecting fork of flexible axle front end connection forward and backward fortune under the action of flexible axle It is dynamic.