TWM644221U - Hydraulic tensioner - Google Patents

Abstract

The hydraulic tensioner of the present invention includes a body with a main cavity and a secondary cavity formed inside, a sleeve arranged between the main cavity and the secondary cavity, and a sleeve located at one end of the sleeve and located at the secondary cavity. The push rod in the cavity, and a stopper at the other end of the sleeve, wherein at least two straight and parallel grooves are opened in the sleeve, so that the hydraulic oil of the hydraulic tensioner can pass through the The grooves smoothly and quickly flow between the main and auxiliary chambers, so as to avoid the hydraulic oil from being hindered during the flow, and at the same time, enough damping can be generated to allow the push rod to support the transmission belt, ensuring that the transmission belt Maintain the best tension and maintain the normal output of the vehicle's power.

Description

Hydraulic tensioner

This creation is about a tension structure, especially a hydraulic tensioner.

Check, the transmission belt used in the vehicle transmission system will change in tension during the gear box shifting process, and will also loosen with the increase of use time. Therefore, the transmission belt must be guided and tensioned with a tensioner. Adjust to make the above-mentioned drive belt in the best tension state, so that the vehicle runs more smoothly, reduces noise, and prevents the vehicle from slipping and other defects.

1, the conventional hydraulic tensioner 1 includes a body 11, a main cavity 12 and a secondary cavity 13 respectively formed in the body 11, one is located in the body 11 and is located in the main cavity 12 and the secondary cavity 13. The sleeve 14 between the secondary cavity 13, a push rod 15 that is located at one end of the sleeve 14 and extends outward from the secondary cavity 13, and a push rod 15 that is located on the sleeve 14 and communicates with the main cavity 12 and The channel 16 of the secondary cavity 13, and a stopper 17 that is located on the channel 16 and controls the communication state between the main cavity 12 and the secondary cavity 13, and the primary cavity 12 and the secondary cavity The body 13 is filled with hydraulic oil (not shown in the figure); wherein, the push rod 15 and the sleeve 14 are integrally formed, and the opening 161 of the channel 16 is opened on the side of the sleeve 14, so that the The channel 16 is bent.

Referring to Fig. 2, when the hydraulic tensioner 1 is in use, the hydraulic oil in the main cavity 12 is squeezed by the push rod 15 interlocking with the sleeve 14. At this time, the stopper 17 closes the Passage 16, in order to produce damping and make this push rod 15 be able to bear against the transmission belt (not shown in the figure) of vehicle transmission system, and then reach the effect of supporting this transmission belt, namely this transmission belt is in the transmission process, does not need When the tension is adjusted, pressure will be applied to the hydraulic tensioner 1 , and the force exerted by the transmission belt can be tightly supported by the push rod 15 .

Continuing from the above, when the transmission belt needs to be tensioned due to gear box speed change, or when it becomes slack due to long-term use, the push rod 15 will protrude outwards and push the transmission belt. At this time, the push rod 15 and the sleeve 14 will be displaced towards the secondary cavity 13, and the stopper 17 will be disengaged from the original position, so that the hydraulic oil in the secondary cavity 13 enters the main cavity 12 through the channel 16, so that Fill the excess space in the main cavity 12 caused by the pushing of the push rod 15 outward, and make the push rod 15 still produce enough damping to support the transmission belt, so as to maintain the transmission belt at an appropriate tension Tight state, so that the transmission belt can achieve the best transmission effect.

However, after actual use, it is found that in view of the opening 161 of the passage 16 being opened on the side of the sleeve 14, the passage 16 is bent, so that when the hydraulic oil enters the main cavity 12 through the passage 16, the The hydraulic oil will be hindered by the bend of the channel 16 and cannot quickly enter the main cavity 12. If some air is mixed in the hydraulic oil, it will be more difficult for the hydraulic oil to enter the main cavity 12, resulting in the pushing The rod 15 cannot be pushed outwards in time to adjust the tension state of the transmission belt, and then the power cannot be output normally during the driving process of the vehicle, and the vehicle produces fuel consumption, powerlessness or knocking, etc., which needs to be improved.

Therefore, the purpose of this new model is to provide a hydraulic tensioner, which can make the hydraulic oil flow smoothly and quickly between the main and auxiliary chambers, so as to adjust the tension state of the transmission belt in time and maintain the normal power of the vehicle. output using .

Therefore, the new hydraulic tensioner includes a body, a main cavity and a secondary cavity respectively formed in the body, a sleeve disposed between the main cavity and the secondary cavity, and a sleeve disposed at one end of the sleeve. And a push rod extending outward from the secondary cavity, a channel that is arranged on the sleeve and communicates with the main cavity and the secondary cavity, and a stopper that is located on the channel, and the main cavity The body and the auxiliary cavity are filled with hydraulic oil, wherein the passage has at least two grooves spaced apart and arranged straight on the inner wall of the sleeve, so that the hydraulic oil can flow smoothly and quickly through the grooves. Between the main and auxiliary chambers, and the hydraulic oil will not be hindered during the flow process, and then quickly generate enough damping to support the push rod, ensure that the transmission belt is maintained at the best tension state, and maintain the balance of the vehicle The normal output of power is used.

The aforementioned and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of preferred embodiments with reference to the drawings.

Referring to shown in Figure 3, a preferred embodiment of the novel hydraulic tensioner 3, this hydraulic tensioner 3 is used to adjust the tension state of the transmission belt (not shown) used in the vehicle transmission system, the hydraulic tension The device 3 includes a body 31, a main cavity 32 and a sub-cavity 33 respectively formed in the body 31, a sleeve 34 arranged between the main cavity 32 and the sub-cavity 33, and a sleeve 34 arranged in the sleeve. One end of the barrel 34 and a push rod 35 extending outward from the secondary cavity 33 , a passage 36 that is located on the sleeve 34 and communicates with the main cavity 32 and the secondary cavity 33 , and a passage 36 that is located on the passage 36 The stopper 37 on the top, so that the communication state between the main cavity 32 and the secondary cavity 33 is controlled by the stopper 37. In addition, the main cavity 32 and the secondary cavity 33 are filled with hydraulic pressure. Oil (not shown in the figure), and in this embodiment, the push rod 35 and the sleeve 34 are separately arranged as an example for illustration.

Still as mentioned above, the sleeve 34 defines a centerline R, and the channel 36 has at least two grooves 361 spaced apart in the sleeve 34, and the grooves 361 are arranged parallel to the centerline R, and , the grooves 361 are evenly distributed on the inner wall of the sleeve 34, and are arranged correspondingly, so that the hydraulic oil can flow through the grooves 361 evenly, and the grooves 361 extend straight in the The inner wall surface of the sleeve 34 makes the main cavity 32 communicate with the secondary cavity 33 through the grooves 361. Furthermore, the number of the grooves 361 can be adjusted according to actual usage requirements, as shown in FIG. 4-1 is an example where two grooves 361 are arranged on the inner wall of the sleeve 34. Figure 4-2 is an example where three grooves 361 are arranged on the inner wall of the sleeve 34. The inner wall of the cylinder 34 is provided with two grooves 361 as an example for illustration.

3 and 5, when the hydraulic tensioner 3 is manufactured, the push rod 35 and the sleeve 34 can be manufactured independently, so that the inner wall of the sleeve 34 is formed with straight grooves Grooves 361, and after the sleeve 34 completes the molding of the grooves 361, the manufactured push rod 35 can be combined with the sleeve 34, which makes the manufacturing and processing of the hydraulic tensioner 3 easier. It is also possible to reduce the cost. At the same time, the grooves 361 are quickly molded on the sleeve 34, and the grooves 361 are arranged in a straight state without bending. Referring to FIG. 3, when the sleeve When the cylinder 34 and the push rod 35 are arranged in the body 31, the sleeve 34 is just located between the main cavity 32 and the secondary cavity 33, and the push rod 35 is located in the secondary cavity 33 and extends outward. against the drive belt.

Referring to Fig. 3 and Fig. 6, in the process of transmission of the transmission belt, it will apply pressure to the hydraulic tensioner 3, and the force exerted by the transmission belt is tightly supported by the push rod 35. The sleeve 34 is against the hydraulic oil in the main cavity 32, and the stopper 37 is pushed by the hydraulic oil to seal one end of the passage 36, so as to generate enough damping to support the push rod 35, so that the push rod 35 will not be pushed inwardly by the transmission belt, and then tightly support the transmission belt, and effectively maintain the tension of the transmission belt. On the contrary, when the transmission belt is loose, the push rod 35 will move toward the transmission When the belt is displaced, the stopper 37 is disengaged from one end of the channel 36, so that the secondary cavity 33 and the main cavity 32 are connected through the grooves 361, so that the hydraulic pressure in the secondary cavity 33 The oil enters the main cavity 32 through the grooves 361. Since the grooves 361 are straight, the hydraulic oil can flow smoothly and quickly from the secondary cavity 33 into the main cavity 32 without will be hindered, and then quickly fill up the excess space generated in the main cavity 32 caused by the outward push of the push rod 35, and then resist the hydraulic oil through the push rod 35 and the sleeve 34 to produce sufficient damping , and support the slack part of the transmission belt, so as to maintain the transmission belt in a proper tension state and achieve the best transmission effect.

To sum up the above, the new hydraulic tensioner has at least two spaced and straight grooves in the sleeve, so that the hydraulic oil can flow smoothly and quickly in the main cavity and the secondary cavity. body without being obstructed, and at the same time quickly fill the excess space in the main cavity caused by the push rod pushing outward, and generate enough damping to support the push rod to push the drive belt, and then adjust quickly and in time The tension state of the transmission belt is to ensure that the transmission belt is maintained in the best tension state and maintain the normal output of the vehicle's power.

But the above is only to illustrate the preferred embodiments of the present invention, and should not limit the scope of implementation of the present invention, that is, all the simple equivalent changes and modifications made according to the patent scope of the present application and the content of the new specification , all should still fall within the scope covered by the patent for this model.

(knowledge) 1: Hydraulic tensioner 11: body 12: Main cavity 13: Auxiliary cavity 14: Sleeve 15: putter 16: channel 17: Stopper 161: opening (this creation) 3: Hydraulic tensioner 31: Body 32: Main cavity 33: Auxiliary cavity 34: Sleeve 35: putter 36: channel 37: stopper 361: Groove R: center line

Figure 1 is a schematic diagram of a conventional hydraulic tensioner. Fig. 2 is a schematic diagram of the operation of a conventional hydraulic tensioner. Fig. 3 is a schematic diagram of a preferred embodiment of the present invention. Fig. 4-1 is a schematic diagram of partial components of the preferred embodiment. Fig. 4-2 is a schematic diagram of another aspect of the partial components of the preferred embodiment. Fig. 5 is an exploded view of partial components of the preferred embodiment. Fig. 6 is a schematic diagram of the operation of the preferred embodiment.

3: Hydraulic tensioner

31: body

32: Main cavity

33: Auxiliary cavity

34: Sleeve

35: putter

36: channel

37: stopper

361: Groove

R: center line

Claims (3)

A hydraulic tensioner is used to adjust the tension state of the transmission belt used in the vehicle transmission system. The hydraulic tensioner includes a body, a main cavity and a secondary cavity respectively formed in the body, and a A sleeve between the main chamber and the auxiliary chamber, a push rod arranged at one end of the sleeve and extending outward from the auxiliary chamber, a push rod arranged on the sleeve and communicating with the main chamber and the auxiliary chamber The channel of the body, and a stopper arranged on the channel and controlling the communication state between the main cavity and the secondary cavity, and the main cavity and the secondary cavity are filled with hydraulic oil; it is characterized in that: The channel has at least two grooves that are spaced apart in the sleeve, and the grooves extend straight on the inner wall of the sleeve, and the main cavity and the secondary cavity are formed through the grooves. conduction, and cooperate with the stopper to control the opening and closing states of the grooves. According to the hydraulic tensioner according to claim 1, wherein, the push rod is set apart from the sleeve. The hydraulic tensioner according to claim 1, wherein the sleeve defines a centerline, and the grooves are arranged parallel to the centerline.

Images