CN218093953U - Synchronizer gear shifting mechanism, gearbox and operation machine - Google Patents
Synchronizer gear shifting mechanism, gearbox and operation machine Download PDFInfo
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- CN218093953U CN218093953U CN202221771141.XU CN202221771141U CN218093953U CN 218093953 U CN218093953 U CN 218093953U CN 202221771141 U CN202221771141 U CN 202221771141U CN 218093953 U CN218093953 U CN 218093953U
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Abstract
The utility model relates to a gearbox, in order to solve the problem that the shift position positioning control is complicated in the existing synchronizer gear shifting mechanism, the utility model constructs a synchronizer gear shifting mechanism, a gearbox and an operation machine, wherein the gear shifting mechanism comprises a cylinder device and a reset mechanism; a piston rod of the cylinder device is fixedly connected with a first end of the gear shifting push-pull rod, and the gear shifting push-pull rod is pushed and pulled to move in the axial direction of the gear shifting push-pull rod; the reset mechanism comprises a first gear disengaging spring and a second gear disengaging spring which are sleeved on the gear shifting support pull rod; the first end of the first gear disengaging spring and the second end of the second gear disengaging spring are fixedly arranged relative to the gear shifting push-pull rod, the second end of the first gear disengaging spring and the second gear disengaging spring are fixedly arranged relative to a box shell of the gearbox, and the first gear disengaging spring and the second gear disengaging spring act on the gear shifting push-pull rod in opposite elastic directions and are positioned in the middle position when the elastic force is balanced. The utility model discloses shift location simple structure, control is simple and easy reliable.
Description
Technical Field
The utility model relates to a gearbox, more specifically say, relate to a synchronous ware gearshift, gearbox and operation machinery.
Background
The synchronizer shifts gears to enable the whole machine to shift smoothly and impact little in the operation or walking process, so that the synchronizer is widely applied to a walking transmission gearbox of walking equipment.
In the existing synchronizer gear shifting mechanism, a gear shifting fork pushes a synchronizer gear sleeve to enable a corresponding synchronizer cone ring on a synchronizer to be jointed with or separated from a corresponding gear to realize gear shifting. The gear shifting fork is fixedly connected with the gear shifting push-pull rod, and the gear shifting push-pull rod is driven by the gear shifting driving device. The driving device pushes and pulls the gear shifting push-pull rod to move in the axial direction of the gear shifting push-pull rod, so that the gear shifting push-pull rod is located at a first engagement position, a middle position and a second engagement position, and the synchronizer is engaged with the first gear, disengaged from the gear and engaged with the second gear correspondingly.
In the gear shifting process of the synchronizer gear shifting mechanism, the gear shifting push-pull rod has three positions, and accurate position control needs to be carried out through a control driving device. In the existing synchronizer gear shifting mechanism, a driving device usually adopts a stepping motor and the like, and the gear shifting control is relatively complex.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is the complicated problem of shift position location control among the current synchronizer gearshift, and provides a synchronizer gearshift, gearbox and operation machinery, simplifies structure and shift control.
The utility model discloses a realize that the technical scheme of its purpose is like: the synchronizer gear shifting mechanism is used for a gearbox and comprises a synchronizer assembly and a gear shifting push-pull rod, wherein the synchronizer assembly comprises a synchronizer capable of being in bidirectional engagement and a gear shifting fork connected with a synchronizer gear sleeve of the synchronizer;
a piston rod of the cylinder device is fixedly connected with a first end of the gear shifting push-pull rod, and the cylinder device is used for pushing and pulling the gear shifting push-pull rod to move in the axial direction of the gear shifting push-pull rod;
the reset mechanism comprises a first gear disengaging spring and a second gear disengaging spring which are sleeved on the gear shifting support pull rod;
the first end of the first gear disengaging spring and the first end of the second gear disengaging spring are both fixedly arranged relative to the gear shifting push-pull rod, the second end of the first gear disengaging spring and the second end of the second gear disengaging spring are fixedly arranged relative to a box shell of the gearbox, the directions of elastic forces of the first gear disengaging spring and the second gear disengaging spring acting on the gear shifting push-pull rod are opposite, and the gear shifting push-pull rod is located at the middle position when the elastic forces of the two springs are balanced.
The utility model discloses in, when the push-and-pull rod of shifting was moved to both ends by the meso position, the push-and-pull rod compression of shifting was kept off the throw-off spring or is kept off the throw-off spring and carry out the energy storage for two, and when the piston rod of jar device removed to the stroke terminal, synchronizer and corresponding gear joint. When the synchronizer is disconnected with the gear, the large cavity and the small cavity of the cylinder device are not filled with pressure media, the piston rod freely moves under the action of external force, the gear shifting push-pull rod moves under the pushing of the corresponding first gear disconnecting spring or second gear disconnecting spring, when the elastic force of the first gear disconnecting spring and the second gear disconnecting spring acting on the gear shifting push-pull rod reaches balance, the gear shifting push-pull rod is in a middle position, the gear shifting push-pull rod stops moving, and at the middle position, the synchronizer is disconnected with the gears on two sides of the synchronizer. The utility model discloses in, when synchronizer and gear joint, by the spacing and the control position of the piston rod stroke end of jar device, synchronizer and gear throw off when being connected to throw off spring compression energy storage for throw off the removal power, one keeps off throw off the spring and keep off the effort that the spring was thrown off to the fender and reach balanced position as throwing off the position location with two. The gear shifting positioning structure is simple in structure and easy and reliable to control.
The utility model provides a synchronizer is the synchronizer of two-way joint, and the axial both sides of its synchronizer gear hub all have the synchronizer cone ring, and synchronizer accessible both sides synchronizer cone ring selects and corresponds the gear joint of side or keeps off the off-going state simultaneously with both sides gear.
The utility model discloses among the synchronizer gear shifting mechanism, one keeps off and breaks off the spring and keeps off the distance that the distance between the first end of breaking off the spring is less than the distance between the second end.
The utility model discloses among the synchronizer gearshift, one keeps off the second end of breaking away the spring and offsets the contact with the floor on the tank wall board or the tank wall board of gearbox separately and be connected.
In the gear shifting mechanism of the synchronizer, the gear shifting push-pull rod is sleeved with the sleeve, the gear shifting fork is sleeved on the sleeve, and the gear shifting fork, the sleeve and the gear shifting push-pull rod are fixedly connected through the fixing pin; the first end of the first gear disengaging spring is connected with the first end of the sleeve in an abutting contact mode, and the first end of the second gear disengaging spring is connected with the second end of the sleeve in an abutting contact mode.
In the gear shifting mechanism of the synchronizer, the gear shifting fork is sleeved on the gear shifting push-pull rod and is fixedly connected with the gear shifting push-pull rod through the fixed pin; and a first step and a second step which are used for abutting and being in contact connection with the first end of the first gear disengaging spring and the first end of the second gear disengaging spring are respectively arranged on two sides of the fixed position of the gear shifting fork of the gear shifting push-pull rod.
The utility model discloses among the synchronizer gearshift, the jar device is hydraulic cylinder or cylinder.
The utility model discloses among the synchronizer gearshift, one keeps off and breaks off the spring and keeps off and break off the spring and be coil spring or belleville spring to can set up the gasket at the spring both ends.
The utility model discloses a realize that the technical scheme of its purpose is like: a gearbox is constructed, and is characterized by comprising the synchronizer gear shifting mechanism, wherein two ends of the gear shifting push-pull rod are slidably arranged on a box shell of the gearbox.
The utility model discloses in the gearbox, the synchronizer gear hub of synchronous ware passes through spline fixed mounting on the input shaft, install on the input shaft in the axial both sides position of synchronizer gear hub can with the first driving gear of synchronizer assembly joint and second driving gear, first driving gear and second driving gear all with the input shaft is rotated and is connected. The arrangement of the synchronizer assembly on the input shaft reduces the torque load carried on the synchronizer when the transmission is in operation.
In the transmission case of the utility model, the transmission case also comprises a middle shaft assembly, the middle shaft assembly comprises a first driven gear, a second driven gear and a middle shaft output driving gear which are fixedly arranged on a middle shaft; the first driven gear and the second driven gear correspond to the inner cores of the first driving gear and the second driving gear, and the output driving gear of the intermediate shaft is arranged between the first driven gear and the second driven gear; the input shaft and the intermediate shaft are arranged in parallel, and two ends of each shaft are rotatably arranged on a box shell of the gearbox through bearings.
The utility model discloses a realize that the technical scheme of its purpose is like: a work machine is constructed which is characterized by the aforementioned gearbox. The work machine may be a loader, an agricultural tractor, a road roller, or the like.
Compared with the prior art, the utility model discloses in, the piston rod stroke terminal point by the jar device is spacing and the control position when synchronous ware and gear joint, uses the energy storage of throwing off the spring for throwing off mobile power when throwing off the connection to keep off and throw off the spring and keep off the effort that the spring was thrown off to one and reach balanced position as throwing off the position location with two, location structure is simple, and control is simple and easy reliable.
Drawings
Fig. 1 is a schematic structural diagram of the shifting mechanism of the synchronizer of the present invention.
Fig. 2 is a schematic diagram of the transmission arrangement of the transmission of the present invention.
Fig. 3 is a schematic structural diagram of the transmission of the present invention.
Part names and serial numbers in the figure:
an input shaft 10, a first gear driving gear 11, and a second gear driving gear 12.
An intermediate shaft 20, a first-gear driven gear 21, a second-gear driven gear 22 and an output driving gear 23.
An output shaft 30 and an output driven gear 31.
Synchronizer 40, shift fork 41, fixed pin 42.
A box shell 50, a first box wall panel 51, and a second box wall panel 52.
The gear-shifting push-pull rod 62, the hydraulic oil cylinder 71, the first gear disengaging spring 72, the second gear disengaging spring 73, the first gasket 74, the second gasket 75, the third gasket 76, the fourth gasket 77, the sleeve 78 and the three-position four-way valve 91.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 1, the synchronizer shift mechanism in the present embodiment, which is used for a transmission, includes a synchronizer assembly, a shift push-pull rod 62, a cylinder device, and a return mechanism.
The synchronizer assembly comprises a synchronizer 40 and a shifting fork 41, one end of the shifting fork 41 is connected with a synchronizer gear sleeve of the synchronizer 40, and the other end of the shifting fork is fixedly connected with a shifting push-pull rod 62. The synchronizer 40 is a bidirectional engagement synchronizer, and both axial sides of a synchronizer hub are provided with synchronizer cone rings which are respectively used for engaging with gears on both sides of the synchronizer.
The shift push-pull rod 62 is arranged parallel to the axis of the synchronizer 40 and is mounted at both ends to the wall plate of the case 50 of the transmission.
The cylinder device is a hydraulic oil cylinder 71, the cylinder body of the cylinder device is fixedly arranged on the box shell 50 of the gearbox, and the piston rod is fixedly connected with the second end of the gear shifting push-pull rod 62. The piston rod of the gear shifting mechanism is stretched relative to the cylinder body under the action of hydraulic oil in a large cavity or a small cavity of the gear shifting mechanism, so that the gear shifting push-pull rod 62 is pushed to move in the axial direction of the gear shifting push-pull rod.
A sleeve 78 is sleeved on the gear shifting push-pull rod 62, the gear shifting fork 41 is sleeved on the sleeve 78, and the gear shifting fork 41, the sleeve 78 and the gear shifting push-pull rod 62 are fixedly connected together through a fixing pin 42. In this embodiment, the shift fork 41 can also be directly fixed to the shift push-pull rod via the fixing pin 42, i.e. without the sleeve 78, and two positioning steps are provided on the shift push-pull rod 62, wherein a first positioning step is used for abutting contact connection with the first end of the first gear release spring 72, and a second positioning step is used for abutting contact connection with the first end of the second gear release spring 73.
In the synchronizer shift mechanism in the present embodiment, the return mechanism includes a first gear disengaging spring 72 and a second gear disengaging spring 73 that are fitted around the shift rail 62, and the distance between the first end of the first gear disengaging spring 72 and the first end of the second gear disengaging spring 73 is smaller than the distance between the second ends.
The first end of the first-gear disengaging spring 72 is connected in abutting contact with the first end of the sleeve 78 through a second gasket 75, and the first end of the second-gear disengaging spring 73 is connected in abutting contact with the second end of the sleeve 78 through a third gasket 76, so that the first ends of the first-gear disengaging spring 72 and the second-gear disengaging spring 73 are fixedly arranged relative to the shift push-pull rod 62. In this embodiment, the shift fork 41 may also be directly fixed to the shift push-pull rod 62 by the fixing pin 42, i.e. without the sleeve 78, and two positioning steps are provided on the shift push-pull rod 62, wherein a first positioning step is used for contacting against the first end of the first gear release spring 72, and a second positioning step is used for contacting against the first end of the second gear release spring 73. The positioning step can also be replaced by two snap rings fixed to the gear shift push-pull rod 62.
A second end of the first gear release spring 72 is connected in abutting contact with the first casing wall plate 51 of the transmission casing through a first gasket 74; the second end of the secondary release spring 73 is connected in abutting contact with the second casing wall 52 of the transmission housing via a fourth spacer 77. In this embodiment, a first rib and a second rib may be further provided in the transmission case 50, and the second end of the first gear release spring 72 and the second end of the second gear release spring 73 are correspondingly connected to the first rib and the second rib in an abutting contact manner.
As shown in fig. 1, the hydraulic cylinder 71 is controlled by a three-position four-way valve 91, two working oil ports of the three-position four-way valve 91 are respectively communicated with a large cavity and a small cavity of the hydraulic cylinder 71, an oil inlet of the three-position four-way valve 91 is connected with a pressure oil source, and an oil return port of the three-position four-way valve 91 is connected with a hydraulic oil tank.
The present embodiment provides a two-speed transmission, as shown in fig. 2 and 3, comprising a housing 50, an input shaft assembly, a countershaft assembly, an output shaft assembly, and the synchronizer shift mechanism of the previous embodiments.
The input shaft assembly comprises an input shaft 10 and a first driving gear and a second driving gear which are connected to the input shaft 10 in a rotating mode, and in the two-speed gearbox, the first driving gear and the second driving gear correspond to a first gear driving gear 11 and a second gear driving gear 12. Two ends of the input shaft 10 are respectively connected on the box shell in a rotating way through bearings. The first gear drive gear 11 and the second gear drive gear 12 are rotatably mounted on the input shaft 10 through bearings.
A synchronizer 40 of the synchronizer shift mechanism is installed on the input shaft 10 between the first gear driving gear 11 and the second gear driving gear 12, and is engaged with the first gear driving gear 11 or the second gear driving gear 12, so that power is transmitted from the input shaft to the first gear driving gear 11 or the second gear driving gear 12 through the synchronizer. A synchronizer hub of the synchronizer 40 is connected to the input shaft 10 by a spline, and the synchronizer 40 is connected to the first gear drive gear 11 or the second gear drive gear 12 by synchronizer cones at both end surfaces thereof.
The intermediate shaft assembly comprises an intermediate shaft 20, a first driven gear and a second driven gear which are fixedly arranged on the intermediate shaft 20, and an output driving gear 23. In the two-speed gearbox, the first driven gear and the second driven gear correspond to a first-gear driven gear 21 and a second-gear driven gear 22; the first stage driven gear 21 and the second stage driven gear 22 are meshed with the first stage drive gear 11 and the second stage drive gear 12, respectively. The output drive gear 23 is disposed between the first-stage driven gear 21 and the second-stage driven gear 22.
The input shaft 10, the intermediate shaft 20 and the output shaft 30 are arranged parallel to each other, and both ends of each shaft are rotatably mounted on the casing of the transmission through bearings.
The axial arrangement position of the output driving gear 23 is opposite to the synchronizer 40, the output driving gear 23 is arranged by utilizing the space between the first-gear driven gear 21 and the second-gear driven gear 22 in the radial direction of the synchronizer 40, the internal arrangement of the gearbox is compact, and meanwhile, the output driving gear 23 is arranged between the first-gear driven gear 21 and the second-gear driven gear 22, so that the mounting bearing force of two ends of the intermediate shaft 20 is relatively uniform. The output shaft assembly comprises an output shaft 30 and an output driven gear 31 fixedly arranged on the output shaft 30, and the output driven gear 31 is meshed with the output driving gear 23. The first-gear driven gear 21, the second-gear driven gear 22 and the output driving gear 23 are all connected with the intermediate shaft through splines. The output driven gear is connected with the output shaft through a spline.
The embodiment also provides a working machine which is a loader with an electric motor as a power device, and can be an agricultural tractor or a road roller. In the working machine, the electric motor is connected to the input shaft 10 of the two-speed transmission in the embodiment described above, and the synchronizer 40 is engaged with the first gear drive gear 11 or the second gear drive gear 12 by controlling the hydraulic cylinder 71 by controlling the three-position four-way valve 91. The power transmission route is as follows: the power is transmitted to the output shaft 30 through the input shaft 10, the synchronizer 40, the first gear driving gear 11 or the second gear driving gear 12 engaged with the synchronizer 40, the corresponding first gear driven gear 21 or the second gear driven gear 22, the intermediate shaft 20, the output driving gear 23 and the output driven gear 31 in sequence, and then is transmitted to the drive axle through the transmission shaft connected with the output shaft 30, so that the walking drive of the working machine is realized.
In the above embodiment, the synchronizer 40 is arranged on the input shaft 10, and the torque on the input shaft 10 is smaller than that on the intermediate shaft 20, so that the torque borne by the synchronizer 40 is smaller, the torque bearing requirement can be reduced, and the service life of the synchronizer 40 can be prolonged. In addition, the output driving gear 23 is arranged between the first-gear driven gear 21 and the second-gear driven gear 22, the axial arrangement position is opposite to the synchronizer 40, the space in the radial direction of the synchronizer 40 is utilized, the internal arrangement of the gearbox is facilitated to be compact, and meanwhile, the output driving gear 23 is located between the first-gear driven gear 21 and the second-gear driven gear 22 and is located in the middle of the intermediate shaft, so that the mounting bearing force of two ends of the intermediate shaft is relatively uniform.
The shifting process of the synchronizer shift mechanism in the above embodiment is positioned as follows:
when the three-position four-way valve 91 is switched from the middle position to the right position, the pressure oil source is communicated with the large cavity of the hydraulic oil cylinder 71 through the three-position four-way valve 91, and the small cavity of the hydraulic oil cylinder 71 is communicated with the hydraulic oil tank through the three-position four-way valve 91. The piston rod of the hydraulic oil cylinder 71 extends out under the action of large-cavity pressure oil, and the gear shifting push-pull rod 62 drives the gear shifting fork 41 to move towards the direction of the second gear driving gear and compress the first end of the second gear release spring 73. When the piston rod of the hydraulic oil cylinder extends to the end of the stroke, the gear shifting push-pull rod 62 moves to the second gear engagement position, and the synchronizer 40 engages with the second gear driving gear 22, so that the transmission operates in the second gear. At the end of the piston rod extension stroke of hydraulic cylinder 71, the synchronizer engages the second gear drive gear 22.
When the three-position four-way valve 91 is switched from the middle position to the left position, the pressure oil source is communicated with the small cavity of the hydraulic oil cylinder through the three-position four-way valve 91, and the large cavity of the hydraulic oil cylinder 71 is communicated with the hydraulic oil tank through the three-position four-way valve. The piston rod of the hydraulic cylinder 71 retracts under the action of the small-chamber pressure oil, and the shift push-pull rod 62 drives the shift fork 41 to move towards the first-gear driving gear 11 (to the first-gear engagement position) and compresses the first end of the first-gear release spring 72. When the piston rod of the hydraulic oil cylinder retracts to the stroke end, the shifting push-pull rod 62 moves to a first gear engagement position, and the synchronizer 40 is engaged with the first gear driving gear 11, so that the gearbox works in a first gear. At the end of the retraction stroke of the piston rod of hydraulic cylinder 71, synchronizer 40 engages first gear drive gear 11.
When the three-position four-way valve 91 is positioned in the middle position, the large cavity and the small cavity of the hydraulic oil cylinder 71 are simultaneously communicated with the hydraulic oil tank through the three-position four-way valve 91, oil liquid in the large cavity and the small cavity of the hydraulic oil cylinder 71 does not have a pushing effect on a piston of the hydraulic oil cylinder 71, and the hydraulic oil cylinder 71 is in a normal state (a free state).
When the three-position four-way valve 91 is switched from the right position to the middle position, the shift push-pull rod 62 is pushed by the second end of the second gear disengagement spring 72 to move from the second gear engagement position to the middle position, and after moving a certain distance, the first end of the sleeve 78 contacts the first end of the first gear disengagement spring 72 and presses the first gear disengagement spring 72, and the shift push-pull rod 62 stops moving and is in the middle position when the elastic forces of the first gear disengagement spring 71 and the second gear disengagement spring 73 acting on the shift push-pull rod 62 reach equilibrium. The middle layer of the synchronizer 40 disengages from the second gear drive gear 12 during movement of the shift push-pull rod 62 from the second gear engagement position to the neutral position.
When the three-position four-way valve 91 is switched from the left position to the middle position, the shift push-pull rod 62 is pushed by the first-gear disengaging spring 72 to move from the first-gear engaging position to the middle position, after a certain distance of movement, the second end of the sleeve 78 contacts with the first end of the second-gear disengaging spring 73 and presses the second-gear disengaging spring, and the shift push-pull rod 62 stops moving and is in the middle position when the elastic forces of the first-gear disengaging spring and the second-gear disengaging spring acting on the shift push-pull rod are balanced. During the shift push-pull rod is moved from the first-gear engagement position to the neutral position, the synchronizer is disengaged from the first-gear drive gear 72. When the gear-shifting push-pull rod 62 is located at the middle position, the gear-shifting fork 41 is located at the middle position, so that the synchronizer is not engaged with the first-gear driving gear and the second-gear driving gear, and the gearbox is in a neutral gear state at the moment.
In this embodiment, the piston of hydraulic cylinder 71 has a two-end travel limit, so that no additional stroke control of the cylinder piston is required during the first and second gear shifting engagement. When a piston of the hydraulic oil cylinder moves to an extreme position in the direction of the large cavity, the synchronizer is engaged with a first-gear driving gear to realize first-gear work of the gearbox; when the piston of the hydraulic oil cylinder moves to the limit position in the small cavity direction, the synchronizer is engaged with a second-gear driving gear to realize the second-gear work of the gearbox; when the neutral gear needs to be shifted, the three-position four-way valve of the hydraulic oil cylinder is controlled to be in the middle position, and the gear shifting push-pull rod moves to the neutral gear position under the action of the first gear disengaging spring 72 or the second gear disengaging spring 73, so that the synchronizer is disengaged from the first gear driving gear 11 and the second gear driving gear 12 at the same time. In the gear shifting process, the state of the hydraulic oil cylinder is controlled only, namely three states of oil filling in the large cavity, oil filling in the small cavity or oil filling in both the large cavity and the small cavity of the hydraulic oil cylinder are controlled, and the specific position of the gear shifting push-pull rod is not required to be controlled, so that the gear shifting control is simple and reliable.
In this embodiment, the hydraulic cylinder may be replaced with a pneumatic cylinder.
Claims (10)
1. A synchronizer gear shifting mechanism is used for a gearbox and comprises a synchronizer assembly and a gear shifting push-pull rod, wherein the synchronizer assembly comprises a synchronizer capable of being engaged in two directions and a gear shifting fork connected with a synchronizer gear sleeve of the synchronizer;
a piston rod of the cylinder device is fixedly connected with a first end of the gear shifting push-pull rod, and the cylinder device is used for pushing and pulling the gear shifting push-pull rod to move in the axial direction of the gear shifting push-pull rod;
the reset mechanism comprises a first gear disengaging spring and a second gear disengaging spring which are sleeved on the gear shifting support pull rod;
the first end of the first gear disengaging spring and the first end of the second gear disengaging spring are both fixedly arranged relative to the gear shifting push-pull rod, the second end of the first gear disengaging spring and the second end of the second gear disengaging spring are fixedly arranged relative to a box shell of the gearbox, the elastic forces of the first gear disengaging spring and the second gear disengaging spring acting on the gear shifting push-pull rod are opposite in direction, and the gear shifting push-pull rod is in a middle position when the elastic forces of the two springs are balanced.
2. The synchronizer shift mechanism according to claim 1, wherein a distance between first ends of said first and second trip springs is less than a distance between second ends.
3. The synchronizer shift mechanism according to claim 2, wherein the second end of the first gear disengagement spring and the second end of the second gear disengagement spring are each connected in abutting contact with a wall plate or a rib on a wall plate of the transmission.
4. The synchronizer shifting mechanism according to claim 3, wherein a sleeve is sleeved on the shifting push-pull rod, the shifting fork is sleeved on the sleeve, and the shifting fork, the sleeve and the shifting push-pull rod are fixedly connected through a fixing pin; the first end of the first gear disengaging spring is connected with the first end of the sleeve in an abutting contact mode, and the first end of the second gear disengaging spring is connected with the second end of the sleeve in an abutting contact mode.
5. The synchronizer shifting mechanism according to claim 3, wherein the shift fork is sleeved on the shift push-pull rod, and the shift fork is fixedly connected with the shift push-pull rod through a fixed pin; and a first step and a second step which are used for being connected with a first end of the first gear disengaging spring and a first end of the second gear disengaging spring in an abutting contact mode are respectively arranged on two sides of the fixed position of the gear shifting fork by the gear shifting push-pull rod.
6. The synchronizer shift mechanism of claim 1 wherein said cylinder means is a hydraulic ram or an air cylinder.
7. A gearbox characterised by a synchronizer shift mechanism according to any one of claims 1 to 6, the shift push-pull rod being slidably mounted at both ends to the housing of the gearbox.
8. The transmission of claim 7, wherein the synchronizer hub is fixedly mounted to the input shaft by a spline, and the input shaft has a first drive gear and a second drive gear mounted to opposite axial sides of the synchronizer hub and engageable with the synchronizer, the first drive gear and the second drive gear both being rotatably coupled to the input shaft.
9. The transmission of claim 8, further comprising a countershaft assembly including a first driven gear, a second driven gear, and a countershaft output drive gear fixedly mounted on a countershaft; the first driven gear and the second driven gear correspond to the first driving gear and the second driving gear inner core, and the intermediate shaft output driving gear is arranged between the first driven gear and the second driven gear; the input shaft and the intermediate shaft are arranged in parallel, and two ends of each shaft are rotatably arranged on a box shell of the gearbox through bearings.
10. A work machine characterized by a gearbox according to any of claims 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221771141.XU CN218093953U (en) | 2022-07-11 | 2022-07-11 | Synchronizer gear shifting mechanism, gearbox and operation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221771141.XU CN218093953U (en) | 2022-07-11 | 2022-07-11 | Synchronizer gear shifting mechanism, gearbox and operation machine |
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| Publication Number | Publication Date |
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| CN218093953U true CN218093953U (en) | 2022-12-20 |
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| CN202221771141.XU Active CN218093953U (en) | 2022-07-11 | 2022-07-11 | Synchronizer gear shifting mechanism, gearbox and operation machine |
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| Country | Link |
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| CN (1) | CN218093953U (en) |
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