Hydraulic automatic tensioner

Abstract

The utility model discloses a hydraulic type automatic tensioner, and relates to the technical field of tensioners. Comprising a tensioner assembly, the tensioner assembly comprises a main body shell, a plunger and a one-way valve assembly located at the top of the plunger are arranged in the main body shell, the top of the plunger extends to the position above the main body shell and is provided with a movable base, an installation arm is arranged on one side of the main body shell, and the one-way valve assembly comprises a one-way valve base arranged in the main body shell. The one-way valve seat, the gasket and the one-way valve cover form a layered one-way valve assembly, the machining difficulty is reduced, the sealing performance is improved, the main spring and the auxiliary spring cooperate to enhance the compression resistance stability, the plug pin and the limiting groove are combined to achieve rapid limiting of the plunger, and the guide block and the guide groove cooperate to eliminate transverse swing. Accurate hydraulic oil supply is achieved through the linkage design of the inclined hole oil way and the annular groove, the overall structure gives consideration to dynamic tension adjusting precision and maintenance convenience, and the device is suitable for long-term stable operation of a high-load transmission system and has wide application prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tensioner, concretely is a kind of hydraulic automatic tensioner. BACKGROUND

[0002] Tensioner is the key device in belt, chain drive system, avoids belt skidding, gear skipping or chain slackening by dynamic regulation tension, ensure the efficient stability of power transmission.Its core value is reflected in: anti-slip: maintain the meshing state of belt and gear, reduce power loss;Anti-wear: avoid abnormal wear of chain wheel and chain caused by too loose or too tight;Safety guarantee: prevent mechanical failure caused by chain drop or synchronous belt rupture.

[0003] Traditional one-way valve integral structure, there is the problem of high processing cost and sealing lip easy failure, single spring design is prone to pressure fluctuation under impact load and plunger movement stability is poor, and the use effect is not ideal. INVENTION CONTENTS

[0004] The utility model provides a kind of hydraulic automatic tensioner to solve the problem in background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of hydraulic automatic tensioner, including tensioner component, the tensioner component includes main body shell, the inside of main body shell is provided with plunger and the one-way valve assembly located at the top of plunger, the top of plunger extends to the upper of main body shell and is provided with movable seat, one side of main body shell is provided with mounting arm.

[0006] Further, one-way valve assembly includes the one-way valve seat being arranged in the inside of main body shell, the inside of one-way valve seat is provided with gasket and the one-way valve cover located at the top of gasket.

[0007] Further, the top of one-way valve cover is convex and the convex one end extends to the inside of plunger and is sleeved with main spring.

[0008] Further, the top of gasket is provided with the secondary spring being located in the inside of one-way valve cover, the top end of secondary spring extends to the inside of convex and is provided with steel ball.

[0009] Further, the top of plunger extends to the inside of movable seat and is provided with top plate, and the top of top plate is penetrated with the bolt between the inside of movable seat.

[0010] Further, the top of main body shell is provided with guide slot and the limiting slot located at one side of guide slot, and one end of bolt extends to the inside of limiting slot.

[0011] Further, one side of movable seat is provided with the guide block that is movably sleeved with the inside of guide slot. Further,

[0012] Further, the inside of the mounting arm is provided with a inclined hole in communication with the inside of the main body shell, and the end of the inclined hole away from the main body shell extends to the bottom of the mounting arm.

[0013] Further, the outside of the plunger is provided with a ring groove in communication with the inside thereof.

[0014] Further, the bottom of the main body shell is provided with a base, and the top of the base is provided with a clamping seat clamped with the bottom of the main body shell.

[0015] Compared with the prior art, the hydraulic automatic tensioner has the following advantages

[0016] Beneficial effects:

[0017] The hydraulic automatic tensioner, the one-way valve seat, the gasket and the one-way valve cover form a layered one-way valve assembly, which reduces the processing difficulty and improves the sealing performance, the main spring and the auxiliary spring synergistically enhance the compression stability, the bolt and the limiting groove are combined to realize the rapid limiting of the plunger, the guide block and the guide groove are matched to eliminate the transverse swing, the inclined hole oil way and the ring groove are designed in linkage to realize the accurate supply of hydraulic oil, the overall structure takes into account the dynamic tension adjustment accuracy and the maintenance convenience, is suitable for the long-term stable operation of a high-load transmission system, and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a structural side view of the utility model;

[0020] Figure 3 It is an explosion view of the structure of the utility model;

[0021] Figure 4 It is an explosion view of the structure of the utility model;

[0022] Figure 5 It is a structural cross-sectional view of the utility model;

[0023] Figure 6 It is a structural side cross-sectional view of the utility model.

[0024] In the drawing: 1, tensioner assembly; 11, main body shell; 12, movable seat; 121, guide block; 13, plunger; 131, one-way valve seat; 132, gasket; 133, one-way valve cover; 134, main spring; 135, auxiliary spring; 136, steel ball; 137, ring groove; 14, base; 141, clamping seat; 15, mounting arm; 151, inclined hole; 16, guide groove; 161, limiting groove; 17, bolt; 18, top plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Please refer to Figures 1-6 The utility model discloses a hydraulic automatic tensioner, including tensioner subassembly 1, tensioner subassembly 1 includes main body shell 11, the inside of main body shell 11 is provided with plunger 13 and the one-way valve assembly at the top of plunger 13, the top of plunger 13 extends to the upper of main body shell 11 and is provided with movable seat 12, one side of main body shell 11 is provided with mounting arm 15.

[0027] Specifically, the one-way valve assembly includes a one-way valve seat 131 arranged in the interior of the main body shell 11, the one-way valve seat 131 is internally provided with a gasket 132 and a one-way valve cover 133 located at the top of the gasket 132.

[0028] In the embodiment, the layered structure of the one-way valve seat 131, the gasket 132 and the one-way valve cover 133 reduces the machining precision requirement of the valve body, the replaceable design of the gasket 132 prolongs the service life, the one-way valve seat 131 is conical in shape and has two sealing lips at the top.

[0029] Specifically, the top of the one-way valve cover 133 is convex and one end of the convex portion extends into the interior of the plunger 13 and is sleeved with a main spring 134.

[0030] In the embodiment, the convex portion extends into the interior of the plunger 13 and cooperates with the structure of the main spring 134, thereby enhancing the compression strength of the one-way valve cover 133.

[0031] Specifically, the top of the gasket 132 is provided with a secondary spring 135 located in the interior of the one-way valve cover 133, the top end of the secondary spring 135 extends into the interior of the convex portion and is provided with a steel ball 136.

[0032] In the embodiment, the secondary spring 135 cooperates with the steel ball 136, thereby ensuring the stability of the gasket 132.

[0033] Specifically, the top of the plunger 13 extends to the inside of the movable seat 12 and is provided with a top plate 18, a bolt 17 is arranged between the top of the top plate 18 and the inside of the movable seat 12, the top of the main body shell 11 is provided with a guide groove 16 and a limiting groove 161 on one side of the guide groove 16, one end of the bolt 17 extends to the inside of the limiting groove 161, and one side of the movable seat 12 is provided with a guide block 121 which movably sleeves the inside of the guide groove 16.

[0034] In the embodiment, one end of the bolt 17 passes through the inside of the movable seat 12 and the top of the top plate 18 and extends to the inside of the limiting groove 161, so that the upward movement of the plunger 13 is limited, and the bolt 17 can be pulled out to contact the limiting groove 161, and the design of the guide groove 16 matched with the guide block 121 can accurately control the upward and downward movement directions of the movable seat 12 and the plunger 13 and cannot cause left and right shaking.

[0035] Specifically, the inside of the mounting arm 15 is provided with an inclined hole 151 which is in communication with the inside of the main body shell 11, one end of the inclined hole 151 away from the main body shell 11 extends to the bottom of the mounting arm 15, and the outside of the plunger 13 is provided with a ring groove 137 which is in communication with the inside of the plunger 13.

[0036] In the embodiment, when the plunger 13 is limited by the bolt 17, the ring groove 137 is not in communication with the inclined hole 151, and when the bolt 17 is pulled out, the plunger 13 drives the ring groove 137 to rise and be in communication with the inclined hole 151, and the inside of the mounting arm 15 is further provided with a fixing hole for being mounted on a vehicle or other equipment.

[0037] Specifically, the bottom of the main body shell 11 is provided with a base 14, and the top of the base 14 is provided with a clamping seat 141 which is clamped with the bottom of the main body shell 11.

[0038] In the embodiment, the inner cavity of the clamping seat 141 is T-shaped and is slid from one side of the bottom of the main body shell 11 to be clamped with the bottom of the main body shell 11.

[0039] To sum up, the hydraulic automatic tensioner, the layered one-way valve assembly composed of the one-way valve seat 131, the gasket 132 and the one-way valve cover 133 reduces the processing difficulty and improves the sealing performance, the main spring 134 and the auxiliary spring 135 synergistically enhance the compression stability, the bolt 17 and the limiting groove 161 are combined to quickly limit the plunger 13, the guide block 121 and the guide groove 16 are matched to eliminate the transverse swing, the inclined hole 151 oil way and the ring groove 137 are linked to accurately supply hydraulic oil, the overall structure takes into account the dynamic tension adjustment accuracy and the maintenance convenience, is suitable for long-term stable operation of a high-load transmission system and has a broad application prospect.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic automatic tensioner, comprising a tensioner assembly (1), characterized in that: The tensioner assembly (1) includes a main body shell (11), inside which a plunger (13) and a one-way valve assembly located on top of the plunger (13) are disposed. The top of the plunger (13) extends above the main body shell (11) and is provided with a movable seat (12). An mounting arm (15) is provided on one side of the main body shell (11).

2. The hydraulic automatic tensioner according to claim 1, characterized in that: The one-way valve assembly includes a one-way valve seat (131) disposed inside the main body housing (11), wherein a gasket (132) is disposed inside the one-way valve seat (131) and a one-way valve cover (133) located on top of the gasket (132).

3. A hydraulic automatic tensioner according to claim 2, characterized in that: The top of the one-way valve cover (133) is convex and one end of the convexity extends into the interior of the plunger (13) and is fitted with a main spring (134).

4. A hydraulic automatic tensioner according to claim 2, characterized in that: The top of the gasket (132) is provided with a secondary spring (135) located inside the one-way valve cover (133), the top of the secondary spring (135) extending into the interior of the protrusion and provided with a steel ball (136).

5. A hydraulic automatic tensioner according to claim 1, characterized in that: The top of the plunger (13) extends into the interior of the movable seat (12) and is provided with a top plate (18), and a pin (17) passes between the top of the top plate (18) and the interior of the movable seat (12).

6. A hydraulic automatic tensioner according to claim 5, characterized in that: The top of the main shell (11) is provided with a guide groove (16) and a limiting groove (161) located on one side of the guide groove (16), and one end of the pin (17) extends into the interior of the limiting groove (161).

7. A hydraulic automatic tensioner according to claim 1, characterized in that: One side of the movable seat (12) is provided with a guide block (121) that is movably fitted inside the guide groove (16).

8. A hydraulic automatic tensioner according to claim 1, characterized in that: The mounting arm (15) has an oblique hole (151) that communicates with the interior of the main body shell (11). The end of the oblique hole (151) away from the main body shell (11) extends to the bottom of the mounting arm (15).

9. A hydraulic automatic tensioner according to claim 1, characterized in that: The plunger (13) has an annular groove (137) on its exterior that communicates with its interior.

10. A hydraulic automatic tensioner according to claim 1, characterized in that: The bottom of the main body shell (11) is provided with a base (14), and the top of the base (14) is provided with a locking seat (141) that engages with the bottom of the main body shell (11).

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