A simple engine transmission system for vehicles

Abstract

The present invention discloses a simple engine transmission system for vehicles, which includes an engine and two drive wheels. The output shaft of the engine is connected with a sun gear transmission member through a transmission assembly. A pair of planetary gear sets are symmetrically fixed at the left and right ends of the sun gear transmission member. The inner teeth of the annular gear ring of the planetary gear set mesh with the planetary gears of the planet carrier, and the outer teeth mesh with a connecting gear. The planet carrier is axially detachably connected with a drive shaft, and the drive shaft is connected with the drive wheels. It further includes a transmission device and an annular gear for controlling the rotation or stillness of the transmission device. The outer teeth of the annular gear mesh with the connecting gear, and the transmission device is axially detachably connected with the drive shaft. This system greatly simplifies the structure of the existing engine transmission system. Through an integrated transmission system, the effect of final transmission that could only be achieved by the collaborative work of multiple sets of transmission equipment before is realized, reducing the production cost, improving the transmission efficiency, and also reducing the difficulty and cost of daily maintenance and repair.

Description

Technical Field

[0001] The present invention relates to an engine transmission system, and more specifically to a simple engine transmission system for vehicles. Background Art

[0002] The transmission structure of traditional fuel engine motor vehicles usually includes components such as a clutch, a synchronizer, a torque converter, a gearbox, a differential, and a drive shaft, and finally the engine power can be transmitted to the drive wheels to realize vehicle driving. The above-mentioned transmission structure is relatively complex, with low transmission efficiency and high cost. At the same time, the requirements for daily vehicle maintenance are also relatively high.

[0003] Therefore, how to develop a simple engine transmission system for vehicles is the research direction desired by the workers in this field. Summary of the Invention

[0004] In view of the defects of the above-mentioned prior art, the purpose of the present invention is to provide a simple engine transmission system for vehicles.

[0005] The technical solution of the present invention is: a simple engine transmission system for vehicles, including an engine and two drive wheels. The output shaft of the engine is connected with a sun gear transmission member through a transmission component. A pair of planetary gear sets are symmetrically fixed at the left and right ends of the sun gear transmission member. The planetary gear set includes an annular gear ring and a planetary carrier. The annular gear ring has internal teeth and external teeth. Its internal teeth mesh with the planet gears of the planetary carrier, and its external teeth mesh with a connecting gear. The planetary carrier is axially detachably connected with a drive shaft, and the drive shaft is connected with the drive wheel.

[0006] It further includes a transmission device and an annular gear connected to the transmission device and used to control the rotation or stillness of the transmission device. The annular gear has external teeth, and its external teeth mesh with the connecting gear. The transmission device is axially detachably connected with the drive shaft.

[0007] The planetary carrier is connected with a planetary carrier brake, and the connecting gear is connected with a connecting gear brake.

[0008] Further, the sun gear member includes a central shaft, and both the left and right ends of the central shaft have a sun gear, and the sun gear is fixedly centered with the annular gear ring.

[0009] Further, the transmission component includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is axially fixed on the output shaft of the engine, and the second bevel gear is axially fixed on the central shaft.

[0010] Further, the rotation or stillness of the ring gear controlling the transmission means that when the rotational speed of the ring gear is lower than the engine idle speed, the ring gear does not drive the transmission to rotate; when the rotational speed of the ring gear exceeds the engine idle speed, the ring gear drives the transmission to rotate.

[0011] Further, the axially separable connection between the planet carrier and the drive shaft means that a first movable pin for connecting the planet carrier is axially slidably arranged on the drive shaft to control the locking or separation between the drive shaft and the planet carrier.

[0012] Further, one end of the planet carrier away from the ring gear has a first card slot for the first movable pin to snap into and be fixed.

[0013] Further, the axially separable connection between the transmission and the drive shaft means that a second movable pin for connecting the transmission is axially slidably arranged on the drive shaft to control the locking or separation between the drive shaft and the transmission.

[0014] Further, the rotating device has a second card slot for the second movable pin to snap into and be fixed.

[0015] Applying a simple engine transmission system for vehicles provided by the present invention, the beneficial effects are as follows: The system has a simple structure, improves the transmission efficiency, reduces the production cost, and also reduces the difficulty and cost of daily maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a schematic diagram of the installation of the first movable pin and the second movable pin of the present invention.

[0018] As shown in the figure: 1 - engine, 1.1 - output shaft, 2 - drive wheel, 3 - transmission component, 31 - first bevel gear, 32 - second bevel gear, 4 - sun gear transmission member, 41 - central shaft, 42 - sun gear, 5 - ring gear, 6 - planet carrier, 7 - planet gear, 8 - connecting gear, 9 - drive shaft, 10 - transmission, 11 - ring gear, 12 - planet carrier brake, 13 - connecting gear brake, 14 - first movable pin, 15 - second movable pin, 16 - first card slot, 17 - second card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] For a more intuitive and complete understanding of the technical solution of the present invention, the following non - restrictive feature description is provided in combination with the drawings of the present invention:

[0020] As Figure 1 and Figure 2As shown in the figure, a simple engine transmission system for a vehicle includes an engine 1 and two drive wheels 2. The output shaft 1.1 of the engine 1 is connected to a sun gear transmission member 4 through a transmission assembly 3. A pair of planetary gear sets are symmetrically fixed to the left and right ends of the sun gear transmission member 4. Both planetary gear sets include an annular gear 5 and a planet carrier 6. The annular gear 5 has internal teeth and external teeth. Its internal teeth mesh with the planet gears 7 of the planet carrier 6, and its external teeth mesh with a connecting gear 8. Both planet carriers 6 are axially detachably connected to a drive shaft 9, and the two drive shafts 9 are respectively connected to a drive wheel 2.

[0021] It further includes two sets of transmission devices 10 and two annular gears 11 connected to the corresponding transmission devices 10 and used to control the rotation or stillness of the transmission devices 10. The annular gears 11 have external teeth, and their external teeth mesh with the connecting gear 8. The transmission devices 10 are axially detachably connected to the drive shafts 9.

[0022] Both planet carriers 6 are connected to a planet carrier brake 12, and both connecting gears 8 are connected to a connecting gear brake 13. The planet carrier brake 12 and the connecting gear brake 13 are respectively used to implement the braking function on the planet carrier 6 and the connecting gear 8. A friction plate design can be adopted, and the planet carrier brake 12 and the connecting gear brake 13 are controlled by an external control component (not shown in the figure) to friction with the planet carrier 6 and the connecting gear 8, and the friction force can be adjusted to control the braking force.

[0023] The sun gear member 4 includes a central shaft 41. Both the left and right ends of the central shaft 41 have a sun gear 42, and the sun gear 42 is fixedly centered with the annular gear 5. When the sun gear 42 rotates, it drives the annular gear 5 to rotate.

[0024] The transmission assembly 3 includes a first bevel gear 31 and a second bevel gear 32 that mesh with each other. The first bevel gear 31 is axially fixed on the output shaft 1.1 of the engine 1, and the second bevel gear 32 is axially fixed on the central shaft 41. When the output shaft 1.1 of the engine 1 rotates, it drives the first bevel gear 31 to rotate. When the first bevel gear 31 rotates, it drives the second bevel gear 32 to rotate, and the second bevel gear 32 then drives the central shaft 41 to rotate.

[0025] The annular gear 11 controlling the rotation or stillness of the transmission device 10 means that: the transmission device 10 is preferably a hydraulic transmission device 10. When the rotational speed of the annular gear 11 is lower than the idle speed of the engine 1, the annular gear 11 does not drive the transmission device 10 to rotate; when the rotational speed of the annular gear 11 exceeds the idle speed of the engine 1, the annular gear 11 drives the transmission device 10 to rotate.

[0026] As Figure 2As shown in the figure, the axially separable connection between the planet carrier 6 and the drive shaft 9 means that a first movable pin 14 for connecting the planet carrier 6 is axially slidably nested on the drive shaft 9 to control the locking or separation of the drive shaft 9 and the planet carrier 6. One end of the planet carrier 6 away from the ring gear 5 has a first card slot 16 for the first movable pin 14 to snap into and fix. The first movable pin 14 has helical teeth (not shown in the figure), and the first card slot 16 has tooth grooves (not shown in the figure) in the same direction as the helical teeth for maintaining the locked state.

[0027] As Figure 2 shown in the figure, the axially separable connection between the transmission 10 and the drive shaft 9 means that a second movable pin 15 for connecting the transmission 10 is axially slidably nested on the drive shaft 9 to control the locking or separation of the drive shaft 9 and the transmission 10. The rotating device has a second card slot 17 for the second movable pin 15 to snap into and fix. The second movable pin 15 has helical teeth (not shown in the figure), and the second card slot 17 has tooth grooves (not shown in the figure) in the same direction as the helical teeth for maintaining the locked state.

[0028] When the vehicle needs to move forward, the first movable pin 14 is pushed by an external mechanical device (not shown in the figure) into the first card slot 16 of the planet carrier 6. At this time, the first movable pin 14 and the planet carrier 6 are locked in a synchronous motion state. Since the first movable pin 14 and the drive shaft 9 always maintain a synchronous rotation lock, when the planet carrier 6 rotates forward, it drives the drive shaft 9 to rotate forward. At this time, the second movable pin 15 is controlled by an external mechanical device (not shown in the figure) to be separated from the transmission 10.

[0029] When the vehicle needs to reverse, the second movable pin 15 is pushed by an external mechanical device (not shown in the figure) into the second card slot 17 of the transmission 10. At this time, the second movable pin 15 and the transmission 10 are locked in a synchronous motion state. Since the second movable pin 15 and the drive shaft 9 always maintain a synchronous rotation lock, when the transmission 10 rotates in reverse, it drives the drive shaft 9 to rotate in reverse. At this time, the first movable pin 14 is controlled by an external mechanical device (not shown in the figure) to be separated from the planet carrier 6.

[0030] The working principle of the present invention is as follows:

[0031] When the vehicle is stationary at idle speed (while the engine 1 is running), the planet carrier brake 12 is in the maximum braking force state, locking the planet carrier 6 in a stationary state. The connecting gear brake 13 is in the released braking state. The power of the output shaft 1.1 of the engine 1 is transmitted to the sun gear member 4 through the transmission assembly 3 and finally drives the ring gear 5 to rotate through the planet gears 7.

[0032] When the vehicle starts to move forward, the planetary carrier brake 12 releases the braking state, and the connecting gear brake 13 gradually increases the braking force. At this time, the power of the output shaft 1.1 of the engine 1 drives the sun gear member 4 through the transmission assembly 3, and the sun gear member 4 drives the planet gear 7, realizing the simultaneous reverse rotation of the planetary carrier 6 and the ring gear 5 through resistance distribution. When the braking force of the planetary carrier brake 12 gradually increases, the reverse rotation speed of the ring gear 5 decreases, and the forward rotation speed of the planetary carrier 6 increases. Since the planetary carrier 6 directly drives the drive shaft 9, and the drive shaft 9 is connected to the two drive wheels 2, when the planetary carrier 6 starts to rotate forward, the vehicle starts to gradually accelerate forward.

[0033] When the vehicle is coasting, the braking force of the connecting gear brake 13 is released (the planetary carrier brake 12 is in the released braking state), the drive wheels 2 drive the drive shaft 9 to rotate, the drive shaft 9 drives the planetary carrier 6 to rotate, and the planetary carrier 6 drives the ring gear 5 to rotate forward. At this time, both sets of sun gears 42, planetary carriers 6 and ring gears 5 are rotating forward.

[0034] When the vehicle is reversing, the planetary carrier brake 12 applies a certain braking force to keep the planetary carrier 6 movable when driven by more than a certain power, and the connecting gear brake 13 releases the braking. At the same time, the first movable pin 14 connecting the planetary carrier 6 retracts and separates from the planetary carrier 6, and the second movable pin 15 locks the transmission 10. Since the power output of the output shaft 1.1 of the engine 1 is transmitted to the sun gear member 4, the sun gear member 4 drives the ring gear 5 to rotate reversely through the planet gear 7, the ring gear 5 drives the connecting gear 8 to rotate, and the connecting gear 8 drives the ring gear 11 to rotate. When the ring gear 11 rotates, a hydraulic pressure is formed. When the hydraulic force reaches a certain value, it will drive the transmission 10 to rotate. And since the second movable pin 15 keeps the transmission 10 locked, at this time the transmission 10 will drive the drive shaft 9 to rotate reversely, and finally the drive wheels achieve reverse movement.

[0035] Differential function of the vehicle drive wheels 2: When the two drive wheels 2 encounter different resistances during driving, they will reversely feedback the resistance to the drive shaft 9, and then the drive shaft 9 feedbacks it to the planetary carrier 6. At this time, since the output shaft 1.1 of the engine 1 drives the central shaft 41 to rotate forward, finally the resistance will be feedback to the ring gear 5. And the torque balance formed between the connecting gear 8 connected to the ring gear 5 and the connecting gear brake 13 is broken, so that the operating speeds of the ring gear 5 and the connecting gear 8 on one side of the different drive wheels 2 are different, realizing the differential function of the drive wheels 2. When the driving force and resistance are different during reversing, finally the resistance will be feedback to the planetary carrier 6, making the two planetary carriers 6 rotate at different speeds, and finally realizing the differential function of the drive wheels 2 during reversing.

[0036] Certainly, the above are only the preferred embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any simple modifications and equivalent structural changes made by using the content of the specification and drawings of the present invention shall be similarly included in the patent protection scope of the present invention.

Claims

1. A simple engine transmission system for a vehicle, comprising an engine and two drive wheels, characterized in that: an output shaft of the engine is connected with a sun gear transmission member through a transmission component, a pair of planetary gear sets are symmetrically fixed at the left and right ends of the sun gear transmission member, the planetary gear set comprises an annular gear ring and a planet carrier, the annular gear ring has internal teeth and external teeth, the internal teeth thereof are meshed with the planet gears of the planet carrier, and the external teeth thereof are meshed with a connecting gear; the planet carrier is axially detachably connected with a drive shaft, and the drive shaft is connected with the drive wheel; it further comprises a transmission device and an annular gear connected with the transmission device and used for controlling the rotation or stillness of the transmission device, the annular gear has external teeth, the external teeth thereof are meshed with the connecting gear, and the transmission device is axially detachably connected with the drive shaft; the planet carrier is connected with a planet carrier brake, and the connecting gear is connected with a connecting gear brake; the rotation or stillness of the transmission device controlled by the annular gear means that: when the rotation speed of the annular gear is lower than the engine idle speed, the annular gear does not drive the transmission device to rotate; when the rotation speed of the annular gear exceeds the engine idle speed, the annular gear drives the transmission device to rotate; the axial detachable connection between the planet carrier and the drive shaft means that: a first movable pin for connecting the planet carrier is axially slidably arranged on the drive shaft to control the locking or separation between the drive shaft and the planet carrier; the axial detachable connection between the transmission device and the drive shaft means that: a second movable pin for connecting the transmission device is axially slidably arranged on the drive shaft to control the locking or separation between the drive shaft and the transmission device.

2. A simple engine transmission system for a vehicle according to claim 1, characterized in that: the sun gear transmission member comprises a central shaft, and sun gears are arranged at both the left and right ends of the central shaft, and the sun gears are fixedly arranged at the centers of the annular gear rings.

3. A simple engine transmission system for a vehicle according to claim 2, characterized in that: the transmission component comprises a first bevel gear and a second bevel gear which are meshed with each other, the first bevel gear is axially fixed on the output shaft of the engine, and the second bevel gear is axially fixed on the central shaft.

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