CN214465943U

CN214465943U - Gearbox with high-low gear switch applicable to serial retarder

Info

Publication number: CN214465943U
Application number: CN202022745730.8U
Authority: CN
Inventors: 问晋芳; 刘丽; 石鹏成; 吕超
Original assignee: China National Heavy Duty Truck Group Datong Gear Co Ltd
Current assignee: China National Heavy Duty Truck Group Datong Gear Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-10-22
Anticipated expiration: 2030-11-24

Abstract

The utility model belongs to gearbox gear shifting equipment field, it is limited because the space is arranged to the gearbox rear end to have solved, can not remain the problem of height gear switch, provides a take gearbox of height gear switch that serial-type retarber was suitable for, including height gear switch, height gear declutch shift shaft, cylinder, and install the cylinder head on the cylinder rear end face, on height gear declutch shift shaft was fixed in the piston of cylinder, along the gearbox axial insert the back cylinder chamber, height gear switch includes the contact, height gear switch is along the radial fixed setting of gearbox on the cylinder head, height gear declutch shift shaft can act on the contact. The utility model discloses simple structure is compact, through the structural arrangement who adopts radial trigger height to keep off the switch, has kept the gearbox height and has kept off the switch.

Description

Gearbox with high-low gear switch applicable to serial retarder

Technical Field

The utility model belongs to gearbox gear shifting equipment field, concretely relates to take gearbox of high-low gear switch that serial-type retarber was suitable for.

Background

Because the improvement of domestic truck market vehicle function segmentation degree, the gearbox functional requirement is more and more, it is one of them to increase serial-type hydraulic retarber at the gearbox rear end, owing to receive the restriction of serial-type retarber arrangement structure, leads to the gearbox height to keep off the switch and arranges the space limited, and the gearbox of taking serial-type retarber has mostly sacrificed originally from the height of taking and has kept off the switch, leads to the vehicle function limited.

Fig. 1 is a layout diagram of a transmission with a tandem retarder, and it can be found from fig. 1 that if a high-low gear switch contact is triggered through the rear end face of a high-low gear shift shaft according to a conventional switch layout method, the existing axial space for arranging the high-low gear switch is only 6.2mm, the actual axial length is required to be 68, the axial length of a tandem retarder support 8 needs to be increased by more than 62mm, and therefore the axial installation length of the transmission needs to be increased by more than 62 mm. The whole weight increase of gearbox exceeds 20Kg this moment, and for guaranteeing later stage maintenance retarber easy dismounting, whole car also need reserve 62mm more in the axial space when arranging the crossbeam. The weight of the gearbox is increased, so that the weight of the gearbox is not beneficial to light weight of a vehicle, the overall cost of the gearbox is increased, and the competitiveness of the vehicle in the user market is greatly reduced. Therefore, a gearbox manufacturer usually cancels the high-low gear switch function, and the whole vehicle cannot keep the high-low gear switch signal indication function.

SUMMERY OF THE UTILITY MODEL

To the motorcycle type that takes serial-type hydraulic retarber motorcycle type and other gearbox rear ends that prior art exists to arrange the limited motorcycle type in space, can not remain the not enough of height fender switch, the utility model aims to provide a take the gearbox of the height fender switch that serial-type retarber was suitable for, through the structural arrangement who adopts radial trigger height fender switch, has remain gearbox height fender switch, has remained the signal output source for whole car when switching height fender, makes the vehicle use when the height keeps off the switching function more directly perceived simple.

In order to achieve the above object, the utility model discloses a following technical scheme, a take gearbox of high-low gear switch that serial-type retarber was suitable for, including high-low gear switch, high-low gear declutch shift shaft, cylinder and install the cylinder head on the cylinder rear end face, on high-low gear declutch shift shaft was fixed in the piston of cylinder, along gearbox axial insertion rear cylinder chamber, high-low gear switch included the contact, and high-low gear switch sets up on the cylinder head along gearbox radial fixation, and high-low gear declutch shift shaft can act on the contact.

Furthermore, the outer end face of the high-low gear shifting fork shaft is provided with an inclined plane, and the top end of the inclined plane is close to one side of the contact.

Further, the outer end portion of the contact is formed in a hemispherical shape.

Further, the outer end portions of the contacts are provided with cylindrical pins.

Furthermore, the material of the cylindrical pin is 20# steel.

Furthermore, a stepped hole is formed in the cylinder cover along the radial direction of the gearbox, the high-low gear switch is fixed on the stepped hole, the contact is inserted into a large hole of the stepped hole, the top of the cylindrical pin is clamped above a small hole of the stepped hole, and the bottom end of the cylindrical pin penetrates through the small hole and is inserted into the rear cylinder chamber.

Furthermore, a clamp spring is fixed on the cylindrical pin.

Furthermore, the cylindrical pin is provided with a clamp spring groove for fixing the clamp spring.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses an adopt the structural arrangement of radial trigger height fender switch, remain the gearbox height fender switch, remain the signal output source for whole car when switching the height fender, make the vehicle use the height to keep off more directly perceived simple when switching the function.

2. The utility model discloses the structure is reliable, the installation is dismantled simply, maintain the basis, easy operation, improved reliability, economic nature, security, the easy maintainability that gearbox and vehicle used.

3. The utility model discloses guarantee under trigger switch's the same prerequisite of radial dimension, can arrange the height with the switch in different angles in a flexible way according to the in-service use demand to the different demands of arranging of adaptation.

4. The contact of the high-low gear switch and the high-low gear shifting fork shaft are triggered through the cylindrical pin, so that the contact is prevented from being directly contacted with the high-low gear shifting fork shaft to cause the top of the high-low gear shifting fork shaft to be biased, the high-low gear switch is prevented from losing efficacy in the early stage, and the integral structure is more reliable;

5. the utility model discloses high-low gear shift fork axle head adopts the inclined plane structure, and the top is dead at high-low gear shift fork axle terminal surface card when preventing high-low gear shift fork axle and cylindric lock contact, leads to unable trigger high-low gear switch.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an axial layout view of a high and low range switch in the prior art;

FIG. 2 is a schematic structural view of the embodiment of the present invention when the cylinder pin is not installed in the high gear;

FIG. 3 is a schematic structural view of the embodiment of the present invention when the cylinder pin is not installed in the low gear;

FIG. 4 is a schematic structural view of the embodiment of the present invention at a high gear after installing a cylindrical pin;

FIG. 5 is a schematic structural view of the embodiment of the present invention at a low gear after the cylindrical pin is installed;

in the figure: 1-high-low gear switch; 1.1-contact; 2-high and low gear shifting fork shaft; 3-a cylinder; 3.1-cylinder head; 3.11-stepped bore; 3.12-rear cylinder chamber; 3.2-piston; 4-cylindrical pins; 5-a clamp spring; 6-a shell; 7-bolt; 8-series retarder bracket.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the practical limitations of the present invention, so that they do not have the essential technical meaning, and any modification of the structures, changes of the ratio relationships, or adjustment of the sizes should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The utility model provides an embodiment: the utility model provides a take gearbox of high-low gear switch that serial-type retarber was suitable for, includes high-low gear switch 1, high-low gear declutch shift shaft 2, cylinder 3 and install cylinder head 3.1 on the 3 rear end faces of cylinder, high-low gear declutch shift shaft 2 is fixed in on the piston 3.2 of cylinder 3, along gearbox axial insertion rear cylinder chamber 3.12, high-low gear switch 1 along gearbox radial fixed setting on cylinder head 3.1, high-low gear declutch shift shaft 2 can act on contact 1.1.

The outer end of the contact 1.1 is hemispherical. The outer end of the high-low gear shifting fork shaft 2 is provided with an inclined plane, and the top end of the inclined plane is close to one side of the contact 1.1.

Referring to fig. 2 and 3, it can be known that a contact 1.1 of the high-low gear switch 1 penetrates through a cylinder cover 3.1 and is inserted into a rear cylinder chamber 3.12, when the high-low gear switch 1 does not work in a high gear, an outer end portion of the contact 1.1 is located in a right side projection plane of an outer end face of a high-low gear shift fork shaft 2 and is not in contact with the high-low gear shift fork shaft 2, and the outer end portion of the contact 1.1 is hemispherical or can be set to be in a structure which is convenient to jack up, such as an arc shape. The head of the high-low gear shifting fork shaft 2 adopts the structural design of an inclined plane, when the high-low gear switch 1 is out of work at a high gear, the bottom end of the contact 1.1 is higher than the inclined plane starting point of the end part of the high-low gear shifting fork shaft 2, so that when the high-low gear shifting fork shaft 2 is prevented from being contacted with the contact 1.1, the rear end surface of the high-low gear shifting fork shaft 2 is propped against the side surface of the contact 1.1, the contact 1.1 cannot be jacked up, and the high-low gear switch 1 cannot be triggered.

On the premise of ensuring that the radial size of the trigger switch is the same, the high-low gear switch 1 can be flexibly arranged at different angles along the radial direction of the gearbox according to actual use requirements so as to adapt to different arrangement requirements. According to the vertical distance between the outer surface of the cylinder cover 3.1 at the arranged position and the axis of the high-low gear shifting fork shaft 2, the contacts 1.1 with different length specifications are selected, so that when the high gear is arranged, the bottom end of the contact 1.1 is positioned in the right side projection plane of the outer end surface of the high-low gear shifting fork shaft 2 and is not in contact with the high-low gear shifting fork shaft 2, when a low gear signal is triggered, the contact 1.1 is positioned on the outer peripheral surface of the high-low gear shifting fork shaft 2, and the contact 1.1 is compressed.

The method comprises the following specific installation steps:

firstly, a high-low gear shifting fork shaft 2 and a piston 3.2 are fixedly connected through a bolt 7 and then integrally installed in a cylinder 3;

the high-low gear switch 1 is installed on the cylinder cover 3.1 along the radial direction of the gearbox through the threads of M18;

the cylinder head 3.1 is fixed through the wall of the cylinder 3 in threaded holes of four M10 in the housing 6 by means of four bolts 7.

The method comprises the following specific working steps:

the contact 1.1 is in a natural elongation in the initial position. The high-low gear shifting fork shaft 2 extends into the rear cylinder chamber 3.12 at the initial position but is not in contact with the contact 1.1.

When the gear of the gearbox is switched to a low gear, the high-low gear shifting fork shaft 2 moves 12mm backwards under the driving of the cylinder 3, when the high-low gear shifting fork shaft is in contact with the contact 1.1, the outer end part of the contact 1.1 is higher than the starting point of the end surface inclined plane of the high-low gear shifting fork shaft 2, the high-low gear shifting fork shaft 2 jacks up the contact 1.1 gradually until the contact 1.1 is completely jacked up, the contact 1.1 is in contact with the outer cylindrical surface at the rear end of the high-low gear shifting fork shaft 2, at the moment, the contact 1.1 of the high-low gear switch 1 is compressed, and the switch is triggered to work to output signals for a vehicle.

When the gear of the gearbox is switched to a high gear, the high-low gear shifting fork shaft 2 returns to the initial position, the contact 1.1 returns to the initial position by the resilience force of the contact 1.1, the contact is in a natural extension state, the switch does not work, and the low gear signal disappears.

Referring to fig. 2 and 3, due to the direct contact with the high-low gear switch 1, the contact 1.1 is stressed laterally, and the contact 1.1 is pushed to be deflected after a long time, so that the high-low gear switch 1 fails. Therefore, the contact 1.1 and the moving high-low gear shifting fork shaft 2 are triggered through the cylindrical pin 4, the contact 1.1 is only stressed by a force in the vertical direction after the cylindrical pin 4 is added, the force in the horizontal direction can be ignored, and the problem that the contact 1.1 directly contacts with the high-low gear shifting fork shaft 2 to cause the contact 1.1 to be biased by the top of the high-low gear shifting fork shaft 2 and cause the early failure of the high-low gear switch 1 is solved. The contact 1.1 with a shorter length specification is selected, so that when the gear is in a high gear, the bottom end of the cylindrical pin 4 is positioned in a right side projection surface of the outer end surface of the high-low gear shifting fork shaft 2 and is not in contact with the high-low gear shifting fork shaft 2, and the contact 1.1 is in a free state; when a low gear signal is triggered, the cylindrical pin 4 is positioned on the outer peripheral surface of the high-low gear shifting fork shaft 2, and the contact 1.1 is compressed.

A stepped hole 3.11 is arranged on the cylinder cover 3.1 along the radial direction of the gearbox, the high-low gear switch 1 is fixed on the stepped hole 3.11, the contact 1.1 is inserted into a large hole of the stepped hole 3.11, the top of the cylindrical pin 4 is clamped above a small hole of the stepped hole 3.11, and the bottom end of the cylindrical pin penetrates through the small hole and is inserted into the rear cylinder chamber 3.12. A clamp spring 5 is fixed on the cylindrical pin 4. The cylindrical pin 4 is provided with a clamp spring groove for fixing the clamp spring 5.

According to the vertical distance between the outer surface of the cylinder cover 3.1 at the arranged position and the axis of the high-low gear shifting fork shaft 2, the contacts 1.1 with different length specifications are selected, so that when the high gear is in high gear, the bottom end of the cylindrical pin 4 is positioned in the right side projection plane of the outer end surface of the high-low gear shifting fork shaft 2 and is not in contact with the high-low gear shifting fork shaft 2, when a low gear signal is triggered, the bottom end of the cylindrical pin 4 is positioned on the outer peripheral surface of the high-low gear shifting fork shaft 2, and the contacts 1.1 are compressed.

Referring to fig. 4 and 5, in the present embodiment, the material of the cylindrical pin 4 is 20# steel, the resilience force of the contact 1.1 in the free state is 30N, and 0.1078N is required to overcome the gravity of the cylindrical pin 4. The resilience force of the contact 1.1 in the free state is enough to jack the cylindrical pin 4 open, so that the contact 1.1 cannot be touched by mistake due to factors such as the gravity of the cylindrical pin 4 in the high-gear state, and the outer end part of the cylindrical pin 4 is hemispherical.

4 tops of cylindric lock set up 5 blocks in the aperture top of step hole 3.11, also can extend the boss on its top, through boss block in step hole 3.11 aperture top etc. satisfy it can block not the landing above the aperture.

During installation, the clamp spring 5 is fixed on a clamp spring groove at the top of the cylindrical pin 4, then the clamp spring is integrally installed above a small hole of the stepped hole 3.11 and is attached to the end part of the contact 1.1, the cylindrical pin 4 cannot cause compression of the contact 1.1 in a high-gear state, and the contact 1.1 is in a natural extension state.

The concrete working steps after the cylindrical pin 4 is installed are as follows:

when the gear of the gearbox is switched to a low gear, the high-low gear shifting fork shaft 2 moves 12mm backwards under the driving of the cylinder 3, when the high-low gear shifting fork shaft is in contact with the cylindrical pin 4, the bottom end of the cylindrical pin 4 is higher than the starting point of the end surface inclined plane of the high-low gear shifting fork shaft 2, the high-low gear shifting fork shaft 2 jacks up the cylindrical pin 4 gradually until the cylindrical pin 4 is completely jacked up and is in contact with the outer cylindrical surface at the rear end of the high-low gear shifting fork shaft 2, the cylindrical pin 4 drives the contact 1.1 to compress along the radial direction, and the switch triggers the work to output signals for a vehicle.

When the gear of the gearbox is switched to a high gear, the high-low gear shifting fork shaft 2 returns to the initial position, the cylindrical pin 4 returns to the initial position under the action of the resilience force of the contact 1.1, the contact 1.1 is in a natural state, the switch does not work, and the low gear signal disappears. The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a take gearbox of high low gear switch that serial-type retarber was suitable for, includes high low gear switch (1), high low gear declutch shift shaft (2), cylinder (3) and install cylinder head (3.1) on cylinder (3) rear end face, on high low gear declutch shift shaft (2) were fixed in piston (3.2) of cylinder (3), along gearbox axial insertion back cylinder chamber (3.12), high low gear switch (1) includes contact (1.1), its characterized in that: the high-low gear switch (1) is fixedly arranged on the cylinder cover (3.1) along the radial direction of the gearbox, and the high-low gear shifting fork shaft (2) can act on the contact (1.1).

2. The transmission with a high-low gear switch applicable to the tandem retarder according to claim 1, characterized in that: the outer end face of the high-low gear shifting fork shaft (2) is provided with an inclined plane, and the top end of the inclined plane is close to one side of the contact (1.1).

3. The transmission with a high-low gear switch applicable to the tandem retarder according to claim 1, characterized in that: the outer end part of the contact (1.1) is hemispherical.

4. A gearbox with a series retarder adapted high and low gear switch according to any of claims 1-3, characterized in that: the outer end part of the contact (1.1) is provided with a cylindrical pin (4).

5. The transmission with a series retarder adapted high-low gear switch according to claim 4, characterized in that: the material of the cylindrical pin (4) is 20# steel.

6. The transmission with a series retarder adapted high-low gear switch according to claim 5, characterized in that: a stepped hole (3.11) is formed in the cylinder cover (3.1) along the radial direction of the gearbox, the high-low gear switch (1) is fixed to the stepped hole (3.11), the contact (1.1) is inserted into a large hole of the stepped hole (3.11), the top of the cylindrical pin (4) is clamped above a small hole of the stepped hole (3.11), and the bottom end of the cylindrical pin penetrates through the small hole and is inserted into the rear cylinder chamber (3.12).

7. The transmission with a series retarder adapted high-low gear switch according to claim 6, characterized in that: and a clamp spring (5) is fixed on the cylindrical pin (4).

8. The transmission with a series retarder adapted high-low gear switch according to claim 7, characterized in that: and a clamp spring groove for fixing the clamp spring (5) is formed in the cylindrical pin (4).