CN201078446Y - Stepless speed change mechanism - Google Patents

Abstract

The utility model discloses a stepless speed change mechanism has the wearing and tearing bump on the slider of the stopper dish of driving disc group, and it corresponds the top and supports in the stopper dish of slip driving-disc and makes a radial interval clearance between a plurality of balls and the interior anchor ring of slip driving-disc. Therefore, when the transmission belt is worn after being used for a long time, the worn salient points are worn, and the reserved gaps are reduced due to the wear of the worn salient points, so that the balls can continuously push the sliding driving disc to axially slide along the force input shaft through centrifugal force, the wear of the transmission belt is absorbed, namely, the stepless transmission can still maintain the highest speed state after the transmission belt is worn, the problems of poor oil consumption, high noise and the like are solved, and the problem that the fault probability is greatly increased due to the fact that the rotating speed of a vehicle engine is greatly increased can be solved.

Description

CVT

technical field

The utility model relates to a stepless speed change mechanism, in particular to a stepless speed change mechanism suitable for vehicles.

Background technique

For general vehicles, if the vehicle is driven by a stepless speed change method, a stepless speed changer will be assembled in the vehicle.

Please refer to the sectional view of the conventional continuously variable transmission shown in Fig. 1, the continuously variable transmission 9 in the drawing includes an input shaft 91, a drive disc set 92, an output shaft 93, a drive disc set 94, and a transmission belt 95.

Wherein, the transmission belt 95 surrounds the drive disc set 92 and the drive disc set 94. The drive disc set 92 includes a drive disc 921, a sliding drive disc 922, a stop disc 923, and a plurality of balls 924. The drive disc set 94 It includes a transmission disc 941 , a sliding transmission disc 942 , and a transmission disc spring 943 .

Please also refer to FIG. 1 and the exploded view of the main part of the conventional drive disc set shown in FIG. Block 925, the sliding drive plate 922 is located between the drive plate 921 and the stop plate 923 and coaxially slid on the input shaft 91, the sliding drive plate 922 includes three slide slots 926, which respectively accommodate three sliders 925 , and the sliding drive plate 922 also includes an accommodating space 927, which corresponds to the stop plate 923. As for the plurality of balls 924, they are accommodated in the accommodating space 927 and resist against the sliding drive plate 922 and the stop plate respectively. Stop plate 923.

In addition, the transmission disc 941 is coaxially fixed on the output shaft 93 , the sliding transmission disc 942 is coaxially slid on the output shaft 93 , and the input shaft 91 is coupled to a vehicle engine 96 .

Therefore, the input shaft 91 can transmit the rotational power of the vehicle engine 96 to the output shaft 93 via the transmission belt 95 in a stepless speed change manner, and the rotation of the input shaft 91 prompts a plurality of balls 924 to push the sliding drive plate 922 along the The input shaft 91 slides axially, and the three sliding grooves 926 of the sliding drive plate 922 slide relative to the three sliding blocks 925 of the stop plate 923, and the transmission plate spring 943 pushes the sliding transmission plate 942 along the The output shaft 93 slides axially.

Yet after continuously variable speed changer 9 is used for a period of time, its drive belt 95 can produce wear and tear, and at this moment, drive belt 95 can make it surround the height of drive disc group 92 and drive disc group 94 because of wear and tear (as shown in the figure 1 number A), that is, the radius of the transmission belt 95 around the drive disc set 92 and the drive disc set 94 will change, and the so-called stepless speed change is to use the drive belt 95 to wrap around the drive disc set 92 and the transmission The change of the radius of the disk set 94 is achieved, so the wear of the drive belt 95 will relatively change the speed ratio between the drive plate set 92 and the drive plate set 94 .

As mentioned above, as a result of the wear of the transmission belt 95, the maximum speed of the continuously variable transmission 9 will be reduced, that is, the vehicle cannot reach the maximum speed state, so problems such as poor fuel consumption and high noise will occur in the vehicle. Furthermore, when the vehicle engine 96 is at the highest speed position after the transmission belt 95 is worn, the speed of the vehicle engine 96 at this position will be greatly increased, and as a result, the failure rate of the vehicle engine 96 will increase greatly.

Utility model content

The purpose of this utility model is to provide a stepless speed change mechanism, which can overcome the influence of the wear of the transmission belt after long-term use, so that the stepless speed changer can still maintain the highest speed state after the wear of the drive belt, so as to avoid poor fuel consumption, Problems such as loud noise.

The utility model basically adopts the features described in detail below in order to solve the above-mentioned problems.

The stepless speed change mechanism of the utility model includes a stepless speed changer, and the stepless speed changer includes an input shaft, a drive disc set, an output shaft, a drive disc set, and a drive belt.

Wherein, the transmission belt is wound around the drive disc set and the drive disc set, the drive disc set includes a drive disc, a sliding drive disc, a stop disc, and a plurality of balls, and the drive disc set includes a drive disc, a sliding drive disc, and a transmission disc spring.

The driving disk and the stop disk of the above-mentioned drive disk group are coaxially fixed on the input shaft, and the stop disk includes at least one slider. The sliding drive disk is located between the drive disk and the stop disk and is coaxially slid on the input shaft. Above, the sliding drive disc includes at least one chute corresponding to accommodate at least one slider, the sliding drive disc includes an accommodating space corresponding to the stop disc, and a plurality of balls are accommodated in the accommodating space and respectively abut against For sliding drive disc and stop disc.

In addition, the transmission discs of the above transmission disc set are coaxially fixed on the output shaft, the sliding transmission discs are coaxially slid on the output shaft, and the input shaft is coupled to a vehicle engine.

Therefore, the input shaft can transmit the rotational power of the vehicle engine to the output shaft through the transmission belt in a stepless speed change manner, and the rotation of the input shaft prompts a plurality of balls to push the sliding drive plate to slide axially along the input shaft with its centrifugal force. At least one chute of the sliding driving disk and at least one sliding block of the blocking disk slide relative to each other, and the transmission disk spring pushes the sliding transmission disk to slide axially along the output shaft with its elastic force.

The utility model is characterized in that the accommodating space of the sliding drive plate includes an inner ring surface, and the sliding drive plate is also provided with a stop plate, and at least one sliding block is protruded with at least one wear bump, which corresponds to the A clearance is radially spaced between the stop disc and the plurality of balls and the inner ring surface.

Therefore, through the design of the wear bumps, a radial gap can be reserved between the multiple balls and the inner ring surface of the sliding drive disc. When the transmission belt wears after long-term use, the wear bumps will also wear at the same time , at this time, the reserved gap will be reduced due to the wear of the wear bumps, so that the multiple balls can continue to push the sliding drive plate to slide axially along the input shaft by centrifugal force, so as to absorb the wear of the drive belt .

The advantage of the utility model is that the above structure can overcome the influence of wear of the transmission belt after long-term use, so that the stepless transmission can still maintain the highest speed state after the wear of the transmission belt, so as to avoid problems such as poor fuel consumption and high noise. And it can avoid the problem that the engine speed of the vehicle is greatly increased and the failure probability is greatly increased.

The wear bumps mentioned above can be triangular, conical, semicircular, or other shapes. Likewise, the number of wear bumps can be two, three, four, or other numbers.

In addition, the wear bumps can be made of plastic, rubber, or other wearable materials.

Description of drawings

Fig. 1 is a sectional view of a conventional continuously variable transmission;

Fig. 2 is an exploded view of the main parts of a conventional drive disk set;

Fig. 3 is a sectional view of the continuously variable transmission of the first preferred embodiment of the utility model;

Fig. 4 is an exploded view of the main parts of the drive disk set in the first preferred embodiment of the present invention;

Fig. 5 is a cross-sectional view of the continuously variable transmission of the first preferred embodiment of the present invention after wear;

Fig. 6 is a perspective view of a slider in a second preferred embodiment of the present invention;

Fig. 7 is a perspective view of a slider in a third preferred embodiment of the present invention;

Fig. 8 is a perspective view of a slider in a fourth preferred embodiment of the present invention.

Symbol Description

Continuously variable transmission 1 Input shaft 2 Drive disc group 3

Drive disc 31 Sliding drive disc 32 Accommodating space 320

Chute 321 Stop disc 322 Inner ring surface 323

Screw 324 Stop disc 33 Tab 330

Slider 331 wear bump 332 wear bump 333

Wear bump 334 Wear bump 335 Slider 336

Slider 337 Slider 338 Ball 34

Output shaft 4 Transmission disc group 5 Transmission disc 51

Sliding drive disc 52 drive disc spring 53 drive belt 6

Vehicle engine 7 Continuously variable transmission 9 Input shaft 91

Drive disc group 92 Drive disc 921 Sliding drive disc 922

Stop plate 923 Ball 924 Slider 925

Chute 926 Accommodating space 927 Output shaft 93

Transmission disc group 94 Transmission disc 941 Sliding transmission disc 942

Drive disc spring 943 Drive belt 95 Vehicle engine 96

Detailed ways

Please also refer to the sectional view of the continuously variable transmission of the first preferred embodiment of the utility model shown in Fig. 3 and the exploded view of the main part of the driving disc group of the first preferred embodiment of the utility model shown in Fig. 4, which shows a A continuously variable transmission 1, and the continuously variable transmission 1 includes an input shaft 2, a drive disc set 3, an output shaft 4, a drive disc set 5, and a drive belt 6.

The drive belt 6 in the drawing is wrapped around the drive disc group 3 and the drive disc group 5, and the drive disc group 3 includes a drive disc 31, a sliding drive disc 32, a stop disc 33, and a plurality of balls 34 (Fig. 2 Three balls 34 are shown in the middle), and the transmission disk set 5 includes a transmission disk 51, a sliding transmission disk 52, and a transmission disk spring 53.

The drive disc 31 of the drive disc group 3 and the stop disc 33 are coaxially fixed on the input shaft 2, the stop disc 33 includes at least one slider 331, and the stop disc 33 is provided with at least one lug 330 protruding outward. , the at least one sliding block 331 is sleeved on the at least one protrusion 330 . In this embodiment, the stop disc 33 includes three sliders 331 , the stop disc 33 has three protruding pieces 330 protruding outward, and the three sliders 331 are sleeved on the three protruding pieces 330 respectively.

In addition, the sliding driving disc 32 of the driving disc group 3 is located between the driving disc 31 and the stop disc 33, and is coaxially slid on the input shaft 2, and the sliding driving disc 32 of the driving disc group 3 includes three slide slots 321, each chute 321 correspondingly accommodates a slider 331, meanwhile, the sliding drive disc 32 of the drive disc group 3 also includes a housing space 320, the housing space 320 corresponds to the stop disc 33, and the plurality of balls 34 It is accommodated in the accommodating space 320 and respectively abuts against the sliding driving disc 32 and the blocking disc 33 .

In addition, the transmission disc 51 of the transmission disc group 5 is coaxially fixed on the output shaft 4, the sliding transmission disc 52 of the transmission disc group 5 is coaxially slid on the output shaft 4, and the input shaft 2 is coupled to a vehicle engine 7 .

Therefore, when the vehicle engine 7 starts running, the input shaft 2 can transmit the rotational power of the vehicle engine 7 to the output shaft 4 via the transmission belt 6 in a steplessly variable manner, and the rotation of the input shaft 2 prompts a plurality of balls 34 to rotate with their centrifugal force. Pushing the sliding drive plate 32 to slide axially along the input shaft 2, the three slide grooves 321 of the sliding drive plate 32 slide relative to each other with the three slide blocks 331 of the stop plate 33 respectively at this time, and the drive plate The spring 53 pushes the sliding transmission disc 52 to slide axially along the output shaft 4 with its elastic force.

The accommodating space 320 of the sliding driving disc 32 of the above-mentioned driving disc group 3 also includes an inner ring surface 323, and the sliding driving disc 32 of the driving disc group 3 is also provided with a stop disc 322, and each slider 331 is respectively A wear convex point 332 is protruded, which abuts against the stop disc 322 correspondingly, and makes a gap t radially spaced between the balls 34 and the inner ring surface 323 (as shown in FIG. 3 ).

In this embodiment, the stop plate 322 is fastened and assembled on the sliding drive plate 32 by a plurality of screws 324 , and the wear protrusion 332 is made of plastic material, and the wear protrusion 332 is triangular in shape.

Please refer to Fig. 3, Fig. 4, and Fig. 5 at the same time the sectional view of the continuously variable transmission of the first preferred embodiment of the utility model shown in Fig. The height of the belt 6 around the drive disc group 3 and the transmission disc group 5 will change. At this time, the wear bump 332 on the slide block 331 will also wear (as shown in Figure 5) simultaneously, and because of the wear bump After the point 332 wears away, the gap t radially spaced between the plurality of balls 34 and the inner ring surface 323 of the sliding drive disc 32 will be reduced due to the wear of the wear bump 332 (as shown in FIG. 5 ), therefore, relatively It will increase the moving distance of the multiple balls 34 in the radial direction, that is, the multiple balls 34 can continue to push the sliding drive plate 32 to slide axially along the input shaft 2 by the centrifugal force, so that the force of the transmission belt 6 can be absorbed. wear and tear.

Therefore, the design of the gap t between the plurality of balls 34 and the inner ring surface 323 of the sliding drive disc 32 caused by the wearing bumps 332 and the wearing bumps 332 can overcome the problem of the transmission belt 6 after long-term use. Affected by wear and tear, the continuously variable transmission 1 can still maintain the highest speed state after the transmission belt 6 is worn, so that problems such as poor fuel consumption and loud noise can be avoided, and the speed of the vehicle engine 7 can be greatly increased to cause a high failure rate increasing problem.

Please refer to the perspective view of the slider of the second preferred embodiment of the utility model shown in Fig. 6, wherein it is shown that the slider 336 is protruded with two wear bumps 333, and the two wear bumps 333 are triangular in shape respectively, and are respectively Rubber material.

Please refer to the perspective view of the slider in the third preferred embodiment of the present invention shown in FIG. 7 , which shows that a wear bump 334 protrudes from the slider 337 , and the wear bump 334 is conical.

Please refer to FIG. 8 , which is a perspective view of the slider of the fourth preferred embodiment of the present invention, wherein a wear bump 335 protrudes from the slider 338 , and the wear bump 335 is semicircular.

The above-mentioned second, third, and fourth preferred embodiments can also achieve the various effects described in the first preferred embodiment, and it can be seen from the above that the wear bumps can be triangular, conical, semicircular, or other shapes etc. Likewise, the number of wear bumps can be two, three, four, or other numbers. In addition, the wear bumps can be made of plastic, rubber, or other wearable materials.

Claims (10)

1. A continuously variable transmission mechanism, comprising: A continuously variable transmission, including an input shaft, a drive disc set, an output shaft, a drive disc set, and a drive belt, wherein the drive belt wraps around the drive disc set and the drive disc set, and the drive disc set Including a drive plate, a sliding drive plate, a stop plate, and a plurality of balls, the drive plate set includes a drive plate, a sliding drive plate, and a drive plate spring, the drive plate is coaxial with the stop plate Fixed on the input shaft, the stop disc includes at least one slider. The sliding drive disc is located between the drive disc and the stop disc and coaxially slid on the input shaft. The sliding drive disc also It includes at least one chute corresponding to accommodate the at least one slider. The sliding drive plate includes an accommodation space corresponding to the stop plate. The balls are accommodated in the accommodation space and respectively abut against the The sliding drive disc and the stop disc, the transmission disc is coaxially fixed on the output shaft, the sliding transmission disc is coaxially slid on the output shaft, the input shaft is coupled to a vehicle engine, and the vehicle engine The rotational power of the drive belt is transmitted to the output shaft in a stepless speed-changing manner, and the rotation of the input shaft prompts the balls to push the sliding drive disc to slide axially along the input shaft with its centrifugal force, and the sliding drive The at least one chute of the disk and the at least one sliding block of the blocking disk slide relative to each other, and the transmission disk spring pushes the sliding transmission disk to slide axially along the output shaft with its elastic force; It is characterized by: The accommodating space of the sliding drive plate includes an inner ring surface, and the sliding drive plate is also provided with a stop plate, and the at least one slider is protruded with at least one wear bump, which is correspondingly abutted against the The disc is stopped, and a gap is radially spaced between the balls and the inner ring surface. 2. The continuously variable transmission mechanism according to claim 1, characterized in that the at least one wear bump is triangular in shape. 3. The continuously variable transmission mechanism according to claim 1, wherein the at least one wear bump is conical. 4. The continuously variable transmission mechanism according to claim 1, wherein the at least one wear bump is semicircular. 5. The continuously variable transmission mechanism according to claim 1, characterized in that the number of the at least one wear bump is two 6 . The continuously variable transmission mechanism according to claim 1 , wherein the at least one wear bump is made of plastic material. 7. The continuously variable transmission mechanism according to claim 1, wherein the at least one wear bump is made of rubber. 8 . The continuously variable transmission mechanism according to claim 1 , wherein at least one protruding piece protrudes outward from the stop disc, and the at least one sliding block is sleeved on the at least one protruding piece. 9 . 9 . The continuously variable transmission mechanism according to claim 8 , wherein the at least one protruding piece has three pieces, and the at least one sliding block has three pieces, which are respectively sleeved on the pieces. 10 . 10 . The continuously variable transmission mechanism according to claim 1 , wherein the stop plate is assembled on the sliding drive plate by a plurality of screws. 11 .

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