A new tappet structure

Abstract

The present invention provides a new tappet structure, belonging to the technical field of automobile parts. It solves the problem that the existing means of adjusting valve clearance are single, tools are needed for adjustment, and the adjustment process is cumbersome and inconvenient. The new tappet structure includes a cam, a tappet, a valve and a rocker mechanism, one end of the rocker mechanism is connected to the valve, the other end of the rocker mechanism is connected to the tappet, and an adjustment box is arranged between the tappet and the cam. The adjustment box includes a box body, a sealing plate, a movable plate, two drive seats, a fixed gear and two rack plates, the two drive seats and the two rack plates are respectively arranged at the upper and lower ends of the box body, the two drive seats are respectively connected to the two rack plates, and control the two rack plates to move relative to or towards each other. The present invention has the advantage of being easy to adjust the size of the valve clearance.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts and relates to a tappet structure, in particular to a novel tappet structure. Background Art

[0002] The function of the valve is to input air into the engine and discharge the exhaust gas after combustion, and the valve lifter is mainly used in the valve mechanism in the automobile engine, responsible for the intake and exhaust of the cylinder. When the whole mechanism is working, the crankshaft drives the camshaft, the camshaft drives the valve lifter, and the valve lifter drives the valve to open and close through the valve guide and corresponding parts. According to the needs of the working stroke of each cylinder of the engine, the intake and exhaust valves are opened and closed at a fixed time, and the movement of the piston is coordinated to accurately input the mixed gas into the cylinder and discharge the exhaust gas out of the cylinder.

[0003] A certain gap is left in the valve and its transmission mechanism to compensate for the expansion of the valve after being heated. This gap is called valve clearance. The valve clearance needs to be checked and adjusted frequently during operation. The existing valve clearance is adjusted by valve tappets, but the valve tappet device generally adjusts the bolts thereon up and down when adjusting the valve clearance, thereby controlling the size of the valve clearance. However, this method has a single means of adjustment and requires tools for adjustment, and the adjustment process is relatively cumbersome and inconvenient. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to provide a new type of tappet structure in order to solve the problem that the existing valve tappet device generally adjusts the valve clearance by adjusting the bolts thereon up and down to control the size of the valve clearance, but this method has a single adjustment means and requires the use of tools during adjustment, and the adjustment process is relatively cumbersome and inconvenient.

[0005] The object of the present invention can be achieved through the following technical solutions: a new type of tappet structure, including a cam, a tappet, a valve and a rocker arm mechanism, one end of the rocker arm mechanism is connected to the valve, the other end of the rocker arm mechanism is connected to the tappet, and an adjustment box is arranged between the tappet and the cam, characterized in that the adjustment box includes a box body, a sealing plate, a movable plate, two driving seats, a fixed gear and two rack plates, the two driving seats and the two rack plates are respectively arranged at the upper and lower ends of the box body, the two driving seats are respectively connected to the two rack plates, and control the two rack plates to move relative to or toward each other, the movable plate is arranged at the upper end of the box body, and is connected to the rack plate arranged at the upper end, the fixed gears are respectively meshed with the two rack plates, and the two rack plates are respectively controlled to move through the two driving seats to control the size of the valve clearance between the movable plate and the tappet.

[0006] In the above-mentioned new push rod structure, a plunger is arranged on the driving seat, a fixing part is integrally arranged in the driving seat, and the plunger moves in the movable space formed by the fixing part, a movable rod is arranged at the lower end of the plunger, the other end of the movable rod is connected to the corresponding rack plate, and controls the rack plate to move up and down, and a reset spring for returning the plunger is sleeved on the movable rod.

[0007] In the above-mentioned novel push rod structure, one end of the return spring is connected to the plunger, and the other end of the return spring is connected to the driving seat.

[0008] In the above-mentioned novel tappet structure, the internal structures of the driving seats arranged at the upper and lower ends of the box body are the same.

[0009] In the above-mentioned novel push rod structure, the rack plate is arranged in an L-shaped structure as a whole, a mounting hole for mounting the movable rod is opened on the rack plate, and a backing plate is arranged on the rack plate arranged at the upper end of the box body.

[0010] In the above-mentioned novel push rod structure, oil inlets for oil intake are respectively provided on the box body at positions relative to the two driving seats, and the oil inlets are externally connected to oil pipes.

[0011] In the above-mentioned novel push rod structure, the lower end of the box body is provided with a supporting portion that abuts against the cam, and the supporting portion and the box body are integrally formed.

[0012] Compared with the prior art, the novel tappet structure adjusts the valve clearance between the housing and the tappet through the drive seat arranged in the housing and the toothed plate connected to the drive seat, which makes it easier for the staff to adjust the size of the valve clearance and is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a cross-sectional structural schematic diagram of the present invention.

[0015] Figure 3 It is a schematic diagram of the rack plate structure in the present invention.

[0016] In the figure, 1, cam; 2, tappet; 3, valve; 4, rocker arm mechanism; 5, adjustment box; 6, box body; 7, sealing plate; 8, movable plate; 9, driving seat; 10, fixed gear; 11, rack plate; 12, plunger; 13, fixed part; 14, movable rod; 15, return spring; 16, support plate; 17, oil inlet; 18, support part. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, the novel tappet structure comprises a cam 1, a tappet 2, a valve 3 and a rocker mechanism 4, one end of the rocker mechanism 4 is connected to the valve 3, the other end of the rocker mechanism 4 is connected to the tappet 2, an adjustment box 5 is arranged between the tappet 2 and the cam 1, the gap between the tappet 2 and the movable plate 8 in the adjustment box 5 is the gap of the valve 3, the rack plate 11 is driven to move by the driving seat 9 in the adjustment box 5, so as to control the size of the gap of the valve 3, the adjustment box 5 comprises a box body 6, a sealing plate 7, a movable plate 8, two driving seats 9, a fixed gear 10 and two rack plates 11 The two driving seats 9 and the two rack plates 11 are respectively arranged at the upper and lower ends of the box body 6, and the two rack plates 11 are movable in the box body 6. The two driving seats 9 are respectively connected to the two rack plates 11, and control the two rack plates 11 to move relative to or toward each other. The movable plate 8 is arranged at the upper end of the box body 6 and is connected to the rack plate 11 arranged at the upper end. The fixed gear 10 is respectively engaged with the two rack plates 11, and the two rack plates 11 are respectively controlled to move through the two driving seats 9 to control the size of the valve 3 gap between the movable plate 8 and the tappet 2.

[0019] To elaborate further, a plunger 12 is provided on the driving seat 9, a fixing portion 13 is integrally provided in the driving seat 9, and the plunger 12 moves in a movable space formed by the fixing portion 13, a movable rod 14 is provided at the lower end of the plunger 12, the other end of the movable rod 14 is connected to the corresponding rack plate 11, and controls the rack plate 11 to move up and down, and a return spring 15 for returning the plunger 12 is sleeved on the movable rod 14.

[0020] To further elaborate on the adjustment of the valve 3 clearance, when the valve 3 clearance is increased, oil is injected into the drive seat 9 at the upper and lower ends at the same time, the hydraulic oil applies pressure to the plunger 12, causing the plunger 12 to move to the bottom of the housing 6, and the return spring 15 is in a compressed state. The movable rod 14 drives the rack plate 11 arranged at the upper end to move downward. At the same time, the movable rod 14 drives the rack plate 11 arranged at the lower end to move upward, thereby increasing the valve 3 clearance. When it is necessary to reduce the valve 3 clearance, the hydraulic oil inside the drive seat 9 is returned, the plunger 12 loses the pressure applied by the hydraulic oil, the return spring 15 pushes the plunger 12 back, the rack plate 11 arranged at the upper end moves upward, and the rack arranged at the lower end moves downward, thereby reducing the valve 3 clearance.

[0021] To further elaborate, one end of the return spring 15 is connected to the plunger 12 , and the other end of the return spring 15 is connected to the drive seat 9 .

[0022] To be more specific, the internal structures of the driving seats 9 disposed at the upper and lower ends of the box body 6 are the same.

[0023] To be more specific, the rack plate 11 is arranged in an L-shaped structure as a whole, and a mounting hole for mounting the movable rod 14 is opened on the rack plate 11 , and a support plate 16 is arranged on the rack plate 11 arranged at the upper end of the box body 6 .

[0024] In further detail, oil inlets 17 for oil inlet are respectively provided on the box body 6 and at positions relative to the two drive seats 9, and the oil inlet 17 is externally connected to an oil pipe. The hydraulic oil enters the interior of the drive seat 9 from the oil inlet 17 through the external oil pipe, thereby applying pressure to the plunger 12 in the drive seat 9, so that the plunger 12 moves in the drive seat 9.

[0025] To be more specific, abutment portion 18 abutting against the cam 1 is disposed at the lower end of the box body 6 , and the abutment portion 18 and the box body 6 are integrally formed.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0027] Although the cam 1, tappet 2, valve 3, rocker mechanism 4, regulating box 5, box body 6, sealing plate 7, movable plate 8, driving seat 9, fixed gear 10, rack plate 11, plunger 12, fixed part 13, movable rod 14, return spring 15, backing plate 16, oil inlet 17, backing part 18 and other terms are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A novel tappet structure, comprising a cam (1), a tappet (2), a valve (3) and a rocker arm mechanism (4), wherein one end of the rocker arm mechanism (4) is connected to the valve (3), and the other end of the rocker arm mechanism (4) is connected to the tappet (2), and an adjustment box (5) is provided between the tappet (2) and the cam (1), characterized in that: The regulating box (5) comprises a box body (6), a sealing plate (7), a movable plate (8), two drive seats (9), a fixed gear (10) and two rack plates (11), wherein the two drive seats (9) and the two rack plates (11) are respectively arranged at the upper and lower ends of the box body (6), the two drive seats (9) are respectively connected to the two rack plates (11) and control the two rack plates (11) to move relative to or towards each other, the movable plate (8) is arranged at the upper end of the box body (6) and connected to the rack plate (11) arranged at the upper end, the fixed gear (10) is respectively meshed with the two rack plates (11), and the two drive seats (9) are respectively used to control the two rack plates (11) to move, thereby controlling the movable plate (8) ) and the size of the valve (3) gap between the push rod (2), the driving seat (9) is provided with a plunger (12), the driving seat (9) is integrally provided with a fixing portion (13), and the plunger (12) moves in a movable space formed by the fixing portion (13), the lower end of the plunger (12) is provided with a movable rod (14), the other end of the movable rod (14) is connected to the corresponding rack plate (11), and controls the rack plate (11) to move up and down, and the movable rod (14) is sleeved with a return spring (15) for returning the plunger (12), one end of the return spring (15) is connected to the plunger (12), and the other end of the return spring (15) is connected to the driving seat (9).

2. A novel tappet structure according to claim 1, characterized in that: The driving seats (9) arranged at the upper and lower ends of the box body (6) have the same internal structure.

3. A novel tappet structure according to claim 1, characterized in that: The rack plate (11) is arranged in an L-shaped structure as a whole. A mounting hole for mounting the movable rod (14) is provided on the rack plate (11). A support plate (16) is arranged on the rack plate (11) arranged at the upper end of the box body (6).

4. A novel tappet structure according to claim 1, characterized in that: Oil inlets (17) for oil intake are respectively provided on the box body (6) at positions relative to the two drive seats (9), and the oil inlets (17) are externally connected to oil pipes.

5. A novel tappet structure according to claim 1, characterized in that: The lower end of the box body (6) is provided with a supporting portion (18) that abuts against the cam (1), and the supporting portion (18) and the box body (6) are integrally formed.

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