CN209164573U - A kind of gearbox designs - Google Patents
A kind of gearbox designs Download PDFInfo
- Publication number
- CN209164573U CN209164573U CN201822027881.2U CN201822027881U CN209164573U CN 209164573 U CN209164573 U CN 209164573U CN 201822027881 U CN201822027881 U CN 201822027881U CN 209164573 U CN209164573 U CN 209164573U
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- CN
- China
- Prior art keywords
- copper sheathing
- shift fork
- fork axle
- gearbox
- mounting hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of gearbox designs, including gearbox body and it is located at the intracorporal shift fork axle of gearbox, the back casing of gearbox body is equipped with copper sheathing mounting hole, is fixed with copper sheathing at copper sheathing mounting hole, shift fork axle passes through copper sheathing, and shift fork axle is connected with copper sheathing clearance fit and sliding；By increasing copper sheathing in back casing and shift fork shaft connection place, and copper sheathing and shift fork axle are slidable clearance fits, then when shift fork axle does straight reciprocating motion under cylinder promotion, the stopping power perpendicular to its direction of motion applied by catch piston, the stopping power can be such that shift fork axle contacts with copper sheathing, and generate sliding friction, the stopping power that i.e. catch piston applies is ultimately applied at copper sheathing and shift fork axle cooperation, this reduces the offset abrasions of piston seal in cylinder, collaborate so that cylinder two effectively be avoided to completely cut off chamber.
Description
Technical field
The utility model relates to gearbox technical fields, more particularly to a kind of gearbox designs.
Background technique
Heavy truck gearbox is to push shifting fork assembly to do straight reciprocating motion by cylinder to switch high and low shift, in cylinder
Cylinder is separated into the two chambers mutually completely cut off by piston seal, if piston seal well damage, two chambers will collaborate from
And influence high and low shift shift quality.
Referring to FIG. 1, Fig. 1 is the schematic diagram of internal structure of heavy truck gearbox in the prior art；Shifting fork assembly is pushed away in cylinder
When doing straight reciprocating motion under dynamic, shift fork axle 7 will receive the power perpendicular to its direction of motion of 5 assembly of catch piston application, and
Because the needs and shift fork axle 7 of assembly are that wide arc gap cooperates, back casing 2 passes through oil sealing with shift fork axle 7 for shift fork axis hole on main casing 1
6 are cooperatively connected, and cylinder 3 is isolated with 2 inner cavity of back casing, therefore the power that catch piston 5 applies eventually is applied to 3 piston of cylinder
On piston seal 4 and 3 barrel of cylinder on；After long-term work, it will lead to 4 eccentric wear of piston seal, 3 liang of isolation chambers of cylinder
It may collaborate, to influence shift quality.
Therefore the abrasion for how reducing piston seal in cylinder, is the skill that those skilled in the art need to solve at present
Art problem.
Utility model content
The purpose of the utility model is to provide a kind of gearbox designs, by increasing in back casing and shift fork shaft connection place
Copper sheathing, reduces the offset of shift fork axle stress generation, and then reduces the abrasion of piston seal in cylinder.
In order to solve the above technical problems, the utility model provides a kind of gearbox designs, including gearbox body and it is located at institute
The intracorporal shift fork axle of gearbox is stated, the back casing of the gearbox body is equipped with copper sheathing mounting hole, consolidates at the copper sheathing mounting hole
Surely there is copper sheathing, the shift fork axle passes through the copper sheathing, and the shift fork axle is connected with the copper sheathing clearance fit and sliding.
Preferably, the copper sheathing mounting hole is located at the one end of seal mounting hole far from cylinder on the gearbox body.
Preferably, the internal diameter of the copper sheathing mounting hole is less than the seal mounting hole, and forms step surface between the two, institute
The end face that copper sheathing is stated close to one end of the seal mounting hole is concordant with the step surface.
Preferably, the copper sheathing and the copper sheathing mounting hole are interference fitted.
Preferably, the size range of the glade plane space between the shift fork axle and the copper sheathing is 0.06-0.145mm.
Preferably, the roughness of the copper sheathing inner wall is not less than Ra1.6.
Preferably, the copper sheathing inner wall is equipped with grease layer.
Gearbox designs provided by the utility model, including gearbox body and it is located at the intracorporal shift fork axle of gearbox, speed change
The back casing of cabinet is equipped with copper sheathing mounting hole, and copper sheathing is fixed at copper sheathing mounting hole, and shift fork axle passes through copper sheathing, shift fork axle and copper
It covers clearance fit and sliding is connected.
By increasing copper sheathing in back casing and shift fork shaft connection place, and copper sheathing and shift fork axle are slidable clearance fits,
Stopping perpendicular to its direction of motion then when shift fork axle does straight reciprocating motion under cylinder promotion, by catch piston application
Power, which can be such that shift fork axle contacts with copper sheathing, and generate sliding friction, i.e., the stopping power that catch piston applies finally is made
At copper sheathing and shift fork axle cooperation, this reduces the offset abrasions of piston seal in cylinder, to effectively avoid gas
Cylinder two completely cuts off chamber and collaborates.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of heavy truck gearbox in the prior art；
Fig. 2 is a kind of structural schematic diagram of specific embodiment of gearbox designs provided by the utility model.
It is marked in attached drawing as follows:
Main casing 1, back casing 2, cylinder 3, piston seal 4, catch piston 5, oil sealing 6, shift fork axle 7, copper sheathing 8.
Specific embodiment
The core of the utility model is to provide a kind of gearbox designs, by increasing in back casing and shift fork shaft connection place
Copper sheathing, reduces the offset of shift fork axle stress generation, and then reduces the abrasion of piston seal in cylinder.
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and specific implementation
The utility model is described in further detail for mode.
Referring to FIG. 2, the structure that Fig. 2 is a kind of specific embodiment of gearbox designs provided by the utility model is shown
It is intended to.
The gearbox designs that specific embodiment of the present invention provides, including gearbox body and to be located at gearbox intracorporal
Shift fork axle 7, the back casing 2 of gearbox body are equipped with copper sheathing mounting hole, are fixed with copper sheathing 8 at copper sheathing mounting hole, shift fork axle 7 passes through
Copper sheathing 8, shift fork axle 7 are connected with 8 clearance fit of copper sheathing and sliding.
By increasing copper sheathing 8 in back casing 2 and 7 junction of shift fork axle, and copper sheathing 8 and shift fork axle 7 are slidable gaps
Cooperation is moved by what catch piston 5 applied perpendicular to it then when shift fork axle 7 does straight reciprocating motion under the promotion of cylinder 3
The stopping power in direction, which can be such that shift fork axle 7 contacts with copper sheathing 8, and generate sliding friction, i.e., catch piston 5 applies
Stopping power is ultimately applied at copper sheathing 8 and 7 cooperation of shift fork axle, and this reduces the offset mills of piston seal 4 in cylinder 3
Damage, so that 3 liang of isolation chambers of cylinder effectively be avoided to collaborate.
Wherein, to guarantee that cylinder 3 is isolated with 2 inner cavity of back casing, lubricating oil intracavitary in back casing 2 is avoided to enter cylinder 3
Interior, copper sheathing mounting hole is preferably located at the one end of seal mounting hole far from cylinder 3 on gearbox body.
Further, the wall thickness of copper sheathing 8 can be smaller, and to save cost, then the internal diameter of copper sheathing mounting hole can be less than oil
Seal installation hole, and step surface can be formed between the two, copper sheathing 8 close to one end of seal mounting hole end face preferably with step surface
Concordantly, to facilitate the fixed and positioned of copper sheathing 8.
Specifically, copper sheathing 8 is fixed at copper sheathing mounting hole, may be implemented there are many mode, it is preferable that copper sheathing 8 and installation
It is interference fitted between hole, is not necessarily to other retaining elements, installed simple and convenient.It is of course also possible to use sunk screw it is fixed etc. its
His fixed form, the application are not specifically limited this.
On the basis of above-mentioned each specific embodiment, the gearbox designs that specific embodiment of the present invention provides,
Copper sheathing 8 and shift fork axle 7 are slidable clearance fits, then glade plane space, the ruler of glade plane space are equipped between shift fork axle 7 and steel bushing
It is very little specifically to can be set in the range of 0.06mm to 0.145mm；Between shift fork axle 7 and steel bushing small―gap suture cooperate, shift fork axle 7 by
Generated offset is smaller when power, further reduces the offset abrasion of piston seal 4 in cylinder 3.
Certainly, the specific value of glade plane space is not limited to this between shift fork axle 7 and copper sheathing 8, can be according to the actual situation
Selected, if can reduce piston seal 4 in cylinder 3 offset abrasion, the protection scope of the utility model it
It is interior.
It further, is the abrasion for reducing shift fork axle 7 and copper sheathing 8, the roughness value of 8 inner wall of copper sheathing is preferably no greater than
1.6, i.e. the roughness of 8 inner wall of copper sheathing is not less than Ra1.6, and copper sheathing 8 can specifically use finishing processing, and it is convenient that the processing is simple, and
It can achieve roughness requirements.
Further, vector lubricating grease can be smeared in 8 inner wall of copper sheathing, forms grease layer, shift fork can not only be reduced
Frictional resistance between axis 7 and copper sheathing 8 guarantees the smooth movement of shift fork axle 7, additionally it is possible to further decrease shift fork axle 7 and copper sheathing 8
Abrasion.
In the description of present utility model application file, each embodiment is described in a progressive manner in specification, often
What a embodiment stressed is the difference from other embodiments, and similar portion refers to each other i.e. between each embodiment
It can.For the device disclosed in the embodiment, since it is corresponded to the methods disclosed in the examples, so description is relatively simple,
Reference may be made to the description of the method.
Gearbox designs provided by the utility model are described in detail above.Specific case used herein
The principles of the present invention and embodiment are expounded, the above embodiments are only used to help understand, and this is practical
Novel method and its core concept.It should be pointed out that for those skilled in the art, not departing from this reality
Under the premise of with new principle, several improvements and modifications can be made to this utility model, these improvement and modification are also fallen into
In the protection scope of the utility model claims.
Claims (7)
1. a kind of gearbox designs, which is characterized in that including gearbox body and it is located at the intracorporal shift fork axle of the gearbox (7),
The back casing (2) of the gearbox body is equipped with copper sheathing mounting hole, is fixed with copper sheathing (8) at the copper sheathing mounting hole, described group
Fork shaft (7) passes through the copper sheathing (8), and the shift fork axle (7) is connected with the copper sheathing (8) clearance fit and sliding.
2. gearbox designs according to claim 1, which is characterized in that the copper sheathing mounting hole is located at the gearbox body
The one end of upper seal mounting hole far from cylinder (3).
3. gearbox designs according to claim 2, which is characterized in that the internal diameter of the copper sheathing mounting hole is less than the oil
Seal installation hole, and form step surface between the two, the copper sheathing (8) close to one end of the seal mounting hole end face with it is described
Step surface is concordant.
4. gearbox designs according to claim 1, which is characterized in that the copper sheathing (8) and the copper sheathing mounting hole mistake
It is full of cooperation.
5. gearbox designs according to any one of claims 1 to 4, which is characterized in that the shift fork axle (7) with it is described
The size range of glade plane space between copper sheathing (8) is 0.06-0.145mm.
6. gearbox designs according to claim 5, which is characterized in that the roughness of copper sheathing (8) inner wall is not less than
Ra1.6。
7. gearbox designs according to claim 6, which is characterized in that copper sheathing (8) inner wall is equipped with grease layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822027881.2U CN209164573U (en) | 2018-12-04 | 2018-12-04 | A kind of gearbox designs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822027881.2U CN209164573U (en) | 2018-12-04 | 2018-12-04 | A kind of gearbox designs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209164573U true CN209164573U (en) | 2019-07-26 |
Family
ID=67342137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822027881.2U Active CN209164573U (en) | 2018-12-04 | 2018-12-04 | A kind of gearbox designs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209164573U (en) |
-
2018
- 2018-12-04 CN CN201822027881.2U patent/CN209164573U/en active Active
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