CN201158307Y - ATV power unit - Google Patents

Abstract

The utility model relates to a power unit of a beach buggy. The front end of the output shaft of an engine is connected with the tail end of a front transmission shaft, the front end of the front transmission shaft is connected with a spline of the input main shaft of a front driving box, a bevel gear is arranged on the output main shaft of the front driving box, and is meshed with a spiral bevel gear on the input shaft of a differential, and the two output shaft sleeves of the differential are respectively connected with two front axle half shafts; external splines with identical shape and size are respectively arranged on the input main shaft and the output main shaft of the front driving box, a spline sliding sleeve is sleeved on the external spline of the output main shaft, a shifting fork of a shifting fork mechanism is clipped in an annular groove on the outer surface of the spline sliding sleeve, and the handle of the shifting fork mechanism is positioned outside the front driving axle and is articulated with the vehicle frame of the beach buggy. The power unit has the advantages of novel concept, easy implementation and wide application range, etc., the power unit can ensure that the beach buggy adopts two-wheel drive or four-wheel drive according to the actual situation, the switching between the two-wheel drive and the four-wheel drive is convenient, the operation is simple, thereby the power and the passing ability of the beach buggy are greatly improved.

Description

ATV power unit

technical field

The utility model relates to a beach car, in particular to a beach car power device.

Background technique

At present, most of the ATVs on the market are driven by the rear wheel drive to move the front wheels (the front wheels have no direct power). The two front wheels of the beach car are installed on the frame through the suspension mechanism, and the two rear wheels are set on the respective rear axle shafts. The power of the ATV is provided by the engine. The rear end of the engine output shaft is connected to the front end of the universal joint spline shaft through the connecting shaft and the first universal joint spline sleeve, and the rear end of the universal joint spline shaft is connected through the second million joint spline shaft. The knuckle spline sleeve is connected with the input shaft of the rear drive box, and the two output shaft sleeves of the rear drive box are respectively connected with the two rear axle half shafts, so that the power of the engine passes through the first universal joint spline sleeve, the universal joint The spline shaft, the second universal joint spline sleeve, the rear drive box and the rear axle half shaft drive the rear wheels to rotate, so that the beach vehicle can run forward or backward. Because only the rear wheels of the beach car have driving force, the power is not strong, and the passability is poor. When the beach car is climbing a very inclined slope, it is difficult to run; Skidding makes it difficult to travel, and then problems such as stalling occur.

Utility model content

The technical problem to be solved by the utility model is to provide a beach car power device, so that the beach car can choose two-wheel drive or four-wheel drive according to needs, thereby improving the power and passability of the beach car.

The technical scheme of the utility model is as follows: a beach car power device, the rear end of the engine output shaft is connected with two rear axle half shafts through the rear transmission mechanism, the key is: the front end of the engine output shaft is connected from the engine housing The front end surface passes through and is connected with the tail end of the front drive shaft through a spline sleeve. The front end of the front drive shaft is spline connected with the input spindle of the front drive box, and a bevel gear is arranged on the output spindle of the front drive box. , the bevel gear meshes with the input spiral bevel gear of the differential, and the two output bushings of the differential are respectively connected with the two front axle half shafts, and the two front axle half shafts are symmetrically arranged on both sides of the differential ; External splines of the same shape and size are arranged on the input spindle and output spindle of the front drive box, and a spline sliding sleeve is set on the external spline of the output spindle, and the outer surface of the spline sliding sleeve is provided with An annular groove, the shift fork of a shift fork mechanism snaps in the annular groove, the handle of the shift fork mechanism is positioned at the outside of the front drive box and is hinged with the beach vehicle frame.

The utility model changes the installation structure of the front wheel of the beach vehicle from a traditional suspension mechanism to a bridge mechanism, so as to receive the power of the engine. A front drive box and a front transmission shaft are added between the front axle mechanism and the engine. The input and output spindles of the front drive box are provided with external splines of the same shape and size, and the splines on the external splines of the output spindle slide The sleeve is controlled by the shift fork mechanism. Driven by the shift fork mechanism, the splined sliding sleeve can slide from the output shaft of the front drive box to the input shaft, so that the output shaft and the input shaft can be engaged or separated, so that the ATV can be adjusted according to the road conditions. Choose between rear-wheel-only drive or front- and rear-wheel drive.

When the engine is working in the utility model, the rear end of the engine output shaft drives the two rear axle shafts to rotate through the rear transmission mechanism, thereby driving the rear wheels to rotate; The input spindle of the front drive box connected to it rotates synchronously. When the input spindle of the front drive box is separated from the output spindle, the input spindle of the front drive box is idling and the output spindle does not rotate. At this time, the ATV is driven by two rear wheels, which is suitable for Drive on roads with better road conditions. When the input spindle and output spindle of the front drive box are in the engaged state, the input spindle drives the output spindle to rotate through the splined sleeve, and the output spindle drives the two front axle half shafts to rotate through the differential, thereby driving the front wheels to rotate. The front and rear wheels of the car have driving force, which greatly enhances the power of the beach car, effectively improves the passability of the beach car, and enables the beach car to run smoothly on steep slopes, muddy and muddy roads.

The front end of the above-mentioned front drive shaft is provided with a drum-shaped external spline, and the drum-shaped external spline stretches into the internal spline hole at the rear of the input main shaft of the front drive case, and the two are connected by splines. The front drive shaft is connected with the inner spline of the input shaft of the front drive box by the drum-shaped external spline, which reduces the difficulty of cooperation between the two, even if the installation position of the front drive shaft and the front drive box is slightly changed due to welding deformation and other reasons It can also be assembled in place, which greatly reduces the difficulty of assembly and the labor intensity of workers, and effectively improves the assembly efficiency. At the same time, since the drum-shaped external spline and the straight-toothed internal spline are used to cooperate between the front drive shaft and the input spindle of the front drive box, the front drive shaft can make a horn around the center of the drum-shaped external spline during transmission. Shaped rotation, thereby effectively preventing collision with the internal spline of the input spindle of the front drive box during centrifugal rotation, eliminating abnormal noise, and ensuring the reliability of transmission performance.

A spring is arranged in the inner spline hole of the input main shaft of the above-mentioned front drive box, and the rear end of the spring stretches into the end face groove of the front transmission shaft. The spring plays the role of eliminating the axial gap between the front drive shaft and the input spindle of the front drive box to further ensure the reliability of the transmission.

A guide column is arranged at the front end of the input spindle of the front drive box, and the guide column extends into the corresponding hole of the output spindle, and the two are in clearance fit. The guide post acts as a guide, making it easier to engage the input and output spindles of the front drive case.

In order to simplify the structure and facilitate installation and manipulation, the above-mentioned fork mechanism is composed of a fork, a guide pin, a connecting rod and a handle. Set on the guide pin, the inner end of the shift fork is snapped into the annular groove on the outer surface of the spline sliding sleeve, the outer end of the shift fork protrudes out of the front drive box housing, and is connected with the front end of the connecting rod, the rear of the connecting rod The end is hinged with the lower end of the handle, and the middle part of the handle is hinged on the beach car frame.

Beneficial effects: the utility model has the characteristics of novel conception, reasonable design, easy implementation and wide application range, etc. It can make the ATV choose two-wheel drive or four-wheel drive according to the actual situation, and switch between two-wheel drive and four-wheel drive It is convenient and easy to operate, thus greatly improving the power and passability of the ATV.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the installation schematic diagram of front drive box and front drive shaft in the utility model.

Fig. 3 is a view along the direction A of Fig. 2 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in FIG. 1 , the internal structure of the engine 1 is the prior art, and will not be repeated here. The rear end of the output shaft of the engine 1 is connected with two rear axle shafts 2 through a rear transmission mechanism. The rear transmission mechanism is composed of connecting shaft 19, the first universal joint spline sleeve 20, the universal joint spline shaft 21, the second universal joint spline sleeve 22 and the rear drive box 23, wherein the connecting shaft 19 is supported on the On the engine 1 housing, the front end of the connecting shaft 19 is docked and fixed with the rear end of the output shaft of the engine 1, and the tail end of the connecting shaft 19 passes through the rear end face of the engine 1 housing, and is connected with the first universal joint spline sleeve 20 The front end of the first universal joint spline sleeve 20 is spline connected with the front end of the universal joint spline shaft 21, and the rear end of the universal joint spline shaft 21 passes through the second universal joint spline The key sleeve 22 is connected with the input shaft of the rear drive box 23, and the two output shaft sleeves of the rear drive box 23 are respectively splined with two rear axle half shafts 2, and the two rear axle half shafts 2 are symmetrically arranged on the left and right sides of the rear drive box 23. On both sides, the axis line of the rear axle half shaft 2 is perpendicular to the axis line of the output shaft of the engine 1 . The structure of the rear drive case 23 is prior art, and will not be described in detail here.

As can be seen from Fig. 1, Fig. 2 and Fig. 3, the front end of the output shaft of the engine 1 passes through the front end of the engine casing, and faces the tail end of the front transmission shaft 4, and the two are splined through the spline sleeve 3, which can Turn together. The front end of the front drive shaft 4 is integrally formed with a drum-shaped external spline, and this drum-shaped external spline stretches into the internal spline hole at the rear part of the input main shaft 6 of the front drive box, and the two are also splined. Since the front transmission shaft 4 and the front drive box input main shaft 6 are fitted with drum-shaped external splines and straight-toothed internal splines, the front transmission shaft 4 can be rotated around the center of the drum-shaped external splines during transmission. The trumpet-shaped rotation effectively prevents collision with the internal spline of the input spindle 6 of the front drive box during centrifugal rotation, eliminates abnormal noise, and ensures the reliability of transmission performance. The middle part of input main shaft 6 is supported in the housing 18 of front drive box 5 by bearing, and the rear end of input main shaft 6 stretches out the rear end face of front drive box housing 18, and the front side of spline hole in input main shaft 6 is processed with and The coaxial and interlinked step groove, the front end of a spring 15 stretches in this step groove, and the rear end of spring 15 stretches in the groove that front transmission shaft 4 front ends offer. The spring 15 plays the role of eliminating the axial gap between the front transmission shaft 4 and the front drive box input main shaft 6, to further ensure the reliability of the transmission.

As can be further seen from Fig. 1, Fig. 2 and Fig. 3, the output main shaft 7 of the front drive case is positioned at the front of the input main shaft 6, and the axis line of the two coincides with the axis line of the output shaft of the engine 1. The middle part of the output main shaft 7 is supported in the housing 18 of the front drive case 5 through bearings, and a bevel gear 8 is integrally formed on the front part of the output main shaft 7, and the bevel gear 8 meshes with the input spiral bevel gear 10 of the differential 9, The two output bushings of the differential 9 are respectively splined with two front axle half shafts 11, and the two front axle half shafts 11 are symmetrically arranged on both sides of the differential 9, and the axle centers of the front axle half shafts 11 The line is perpendicular to the axis line of the engine 1 output shaft. Differential gear 9 is prior art, and its structure is not described in detail here. The front end of the input main shaft 6 of the front drive box is integrally formed with a step-shaped guide post 6a, which is small in front and large in back. A section of the input spindle 6 adjacent to the guide column 6a is side by side with the tail end of the output spindle 7, and external splines of the same shape and size are arranged on the outer circumference of the two, and a spline sliding sleeve is set on the external spline of the output spindle 7 12. The splined sleeve 12 cooperates with the spline of the output spindle 7, and is controlled by the fork mechanism. Driven by the fork mechanism, the splined sleeve 12 can slide toward the input spindle 6, so that the input spindle 6 and the output spindle 7 Connected together by splined sliding sleeve 12.

It can also be seen from FIGS. 2 and 3 that an annular groove is formed on the outer surface of the splined sliding sleeve 12 . The fork mechanism is composed of a fork 13, a guide pin 16, a connecting rod 17 and a handle 14, wherein the guide pin 16 is arranged in a direction parallel to the axis line of the input main shaft 6, and is installed on the front drive case housing 18 to give way in the hole. The middle part of the shift fork 13 is looped on the guide pin 16, the inner end of the shift fork 13 is fork-shaped, and is snapped into the annular groove on the outer surface of the spline sliding sleeve 12, and the outer end of the shift fork 13 protrudes from the front drive case housing 18 Outside, and be connected with the front end of connecting rod 17, the rear end of described connecting rod 17 is hinged with the lower end of handle 14, and the middle part of handle 14 is hinged on the beach vehicle frame. When the upper end of the handle 14 is pulled forward, the handle 14 rotates counterclockwise around the hinge point in the middle (see Figure 3), and the lower end of the handle 14 drives the connecting rod 17 to move backwards, and the connecting rod 17 drives the shift fork 13 to move forward. Slide back on the guide pin 16, so that the splined sliding sleeve 12 slides toward the input spindle 6, and the input spindle 6 and the output spindle 7 are connected together through the splined sliding sleeve 12, and are in an engaged state; the upper end of the handle 14 is held backward When pulling, the handle 14 drives the shift fork 13 to slide forward on the guide pin 16 through the connecting rod 17, so that the spline sliding sleeve 12 is completely returned to the output main shaft 7, and the input main shaft 6 and the output main shaft 7 are in a separated state.

In the utility model, the rear end of the output shaft of the engine 1 is sequentially driven by the connecting shaft 19, the first universal joint spline sleeve 20, the universal joint spline shaft 21, the second universal joint spline sleeve 22 and the rear drive box 23. The two rear axle half shafts 2 rotate, thereby driving the rear wheels to rotate; the front end of the output shaft of the engine 1 drives the front drive shaft 4 to rotate, and the front drive shaft 4 drives the input spindle 6 of the front drive box connected to it to rotate synchronously. When the input main shaft 6 and the output main shaft 7 were in a separated state, the front drive box input main shaft 6 was idling, and the output main shaft 7 did not rotate. When the input main shaft 6 and the output main shaft 7 of the front drive box are under the control of the fork mechanism, when they are connected through the splined sliding sleeve 12 and are in the engaged state, the input main shaft 6 drives the output main shaft 7 to rotate through the splined sliding sleeve 12, and the output main shaft 7 passes through the splined sliding sleeve 12. The differential 9 drives the two front axle shafts 11 to rotate, thereby driving the front wheels to rotate. At this time, the front and rear wheels of the ATV have driving force, which greatly enhances the power of the ATV and effectively improves the passability of the ATV. , so that the ATV can run smoothly on the slopes, muddy and muddy roads.

Claims (5)

1. A beach car power unit, comprising an engine (1), characterized in that: the front end of the output shaft of the engine (1) passes through the front end of the engine housing, and is connected to the front drive through the spline sleeve (3) The tail end of the shaft (4) is connected, and the front end of the front transmission shaft (4) is splined connected with the input main shaft (6) of the front drive box (5), and the output main shaft (7) of the front drive box (5) A bevel gear (8) is arranged on the top, and the bevel gear (8) meshes with the input spiral bevel gear (10) of the differential (9), and the two output bushings of the differential (9) are respectively connected with two The front axle half shafts (11) are connected, and the two front axle half shafts (11) are symmetrically arranged on both sides of the differential (9); the input main shaft (6) and the output main shaft (7) of the front drive case (5) ) is provided with external splines of the same shape and size, and a spline sliding sleeve (12) is set on the external spline of the output spindle (7). The outer surface of the spline sliding sleeve (12) is provided with an annular groove. A shift fork (13) of a shift fork mechanism snaps in the annular groove, and the handle (14) of the shift fork mechanism is positioned at the outside of the front drive box (5) and is hinged with the beach vehicle frame. 2. The beach vehicle power unit according to claim 1, characterized in that: a drum-shaped external spline is provided at the front end of the front drive shaft (4), and the drum-shaped external spline extends into the input spindle of the front drive box (6) In the inner spline hole at the rear, the two are connected by splines. 3. The beach vehicle power device according to claim 2, characterized in that: a spring (15) is arranged in the inner spline hole of the input spindle (6) of the front drive box, and the rear end of the spring (15) Extend into the end face groove of the front drive shaft (4). 4. The beach vehicle power unit according to claim 1, 2 or 3, characterized in that: a guide column (6a) is provided at the front end of the input spindle (6) of the front drive box, and the guide column (6a) extends In the corresponding hole of the input and output spindle (7), the two are clearance fit. 5. The beach vehicle power unit according to claim 1, characterized in that: the fork mechanism is composed of a fork (13), a guide pin (16), a connecting rod (17) and a handle (14), wherein the guide The pin (16) is installed in the relief hole on the front drive box housing (18), the middle part of the shift fork (13) is looped on the guide pin (16), and the inner end of the shift fork (13) snaps into the In the annular groove on the outer surface of the splined sliding sleeve (12), the outer end of the shift fork (13) stretches out of the front drive case housing (18), and is connected with the front end of the connecting rod (17), and the connecting rod (17) ) is hinged with the lower end of the handle (14), and the middle part of the handle (14) is hinged on the beach vehicle frame.

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