A rocker arm seat and rocker arm shaft assembly

Abstract

The present invention discloses a rocker arm seat and rocker arm shaft assembly, including a seat body, two positioning bosses are provided on both sides of the seat body, two hinge shafts are installed on the two positioning bosses, two parallel rocker arm shafts are rotatably provided on the two hinge shafts, an oil groove is provided at the bottom end of the seat body, the two hinge shafts are provided with locking bolts that pass through the positioning bosses and extend into the oil groove, and a sealing ring arranged around the oil groove is provided on the bottom surface of the seat body. The rocker arm seat and rocker arm shaft assembly of the present invention belongs to the field of valve rocker arm technology, the hinge shaft and the rocker arm shaft are in arc surface contact, ensuring that the axial force of the locking bolts that tighten the rocker arm shaft and the rocker arm seat during the long-term use of the diesel engine is not attenuated; the hinge shaft and the rocker arm shaft are assembled on the seat body in a stacking manner, with good assembly processability and maintainability, and can ensure that the two structures are in surface contact when limiting, with a large contact area and firm locking.

Description

Technical Field

[0001] The invention relates to valve rocker arm technology, and more particularly to a rocker arm seat and a rocker arm shaft assembly. Background Art

[0002] At present, in the diesel engine rocker arm seat and rocker arm shaft assembly, when the intake rocker arm shaft and the exhaust rocker arm shaft are not coaxial (not parallel or coplanar), the lower semi-circular shaft surface of the intake rocker arm shaft and the lower semi-circular shaft surface of the exhaust rocker arm shaft are generally matched with the semi-circular holes opened in the rocker arm seat and fastened to the rocker arm seat separately.

[0003] Although this method has a simple structure, few parts and simple assembly process, it is sometimes subject to the inherent limitations of this structure. The inner and outer arc surfaces are matched during assembly, and there is line contact during radial compression. The axial force of the bolts that tighten the rocker arm shaft and the rocker arm seat can easily attenuate, causing failure of the rocker arm assembly, such as causing the fasteners to loosen. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and the purpose of the present invention is to provide a rocker arm seat and a rocker arm shaft assembly.

[0005] To achieve the above-mentioned objectives, the present invention provides a rocker arm seat and rocker arm shaft assembly, including a seat body, two positioning bosses are provided on both sides of the seat body, two hinge shafts are installed on the two positioning bosses, two parallel rocker arm shafts are rotatably provided on the two hinge shafts, an oil groove is provided at the bottom end of the seat body, locking bolts are provided on the two hinge shafts that pass through the positioning bosses and extend into the oil groove, and a sealing ring arranged around the oil groove is provided on the bottom surface of the seat body.

[0006] Furthermore, a slot matched with the positioning boss is provided at the bottom end of the middle part of the hinge shaft, and a positioning plane positioned with the head of the locking bolt is provided at the top end of the middle part of the hinge shaft.

[0007] Furthermore, the rocker arm shaft is provided with a positioning groove adapted to the two side surfaces of the positioning boss, and the groove walls on both sides of the positioning groove are provided with hinge holes adapted to the two ends of the hinge shaft.

[0008] Furthermore, the front end of the rocker arm shaft is open and provided with a mounting groove, a pin is provided in the mounting groove, and a roller is provided on the pin.

[0009] As a further improvement, the positioning boss is provided with a through hole compatible with the locking bolt, the bottom end of the through hole is provided with a positioning hole connected to the oil groove, the positioning hole is provided with a first elastic positioning sleeve, and the top of the through hole is provided with a second elastic positioning sleeve which is inserted into the inner hole of the rocker arm shaft.

[0010] Furthermore, a notch adapted to the oil groove is formed on one side of the first elastic positioning sleeve.

[0011] As a further improvement, a sealing groove surrounding the positioning hole and the oil groove is provided on the bottom surface of the seat body, and the sealing ring is matched with the sealing groove.

[0012] The central axes of the two rocker arm shafts are parallel, and the two positioning bosses are square bosses protruding from the seat body.

[0013] Furthermore, the groove wall at the bottom of the hinge shaft is adapted to the two side surfaces of the positioning boss.

[0014] Beneficial Effects

[0015] Compared with the prior art, the beneficial effects of the rocker seat and rocker shaft assembly of the present invention are as follows: the rocker seat and rocker shaft assembly of the present invention, the articulated shaft and the rocker shaft are in arc surface contact, ensuring that the axial force of the locking bolts that tighten the rocker shaft and the rocker seat does not decay during long-term use of the diesel engine; the articulated shaft and the rocker shaft are assembled on the seat body in a stacked manner, with good assembly processability and maintainability, and can ensure that the two structures are in surface contact when limiting, with a large contact area and firm locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the structure of the rocker arm seat and the rocker arm shaft assembly of the present invention;

[0017] Figure 2 It is a structural side view of the rocker arm seat and the rocker arm shaft assembly of the present invention;

[0018] Figure 3 It is a bottom view of the structure of the rocker arm seat and the rocker arm shaft assembly of the present invention;

[0019] Figure 4 yes Figure 1 Structural cross-section view in the middle BB direction;

[0020] Figure 5 yes Figure 1 Structural cross-section view in the CC direction;

[0021] Figure 6 This is a structural front view of the seat body in the present invention;

[0022] Figure 7 It is a top view of the structure of the seat body in the present invention;

[0023] Figure 8 yes Figure 6 Structural cross-section view in the AA direction;

[0024] Fig. 9It is a bottom view of the structure of the seat body in the present invention;

[0025] Fig.10 yes Fig. 9 Structural cross-sectional view in the EE direction;

[0026] Fig.11 It is a structural schematic diagram of the rocker arm shaft in the present invention;

[0027] Fig.12 It is a structural cross-sectional view of the rocker arm shaft in the present invention;

[0028] Fig.13 It is a structural schematic diagram of the hinge shaft in the present invention;

[0029] Fig.14 It is a structural sectional view of the hinge shaft in the present invention.

[0030] In the figure: 1. seat body; 2. positioning boss; 3. hinge shaft; 4. rocker shaft; 5. oil groove; 6. locking bolt; 7. sealing ring; 8. slot; 9. positioning groove; 10. hinge hole; 11. pin shaft; 12. roller; 13. through hole; 14. positioning hole; 15. first elastic positioning sleeve; 16. second elastic positioning sleeve; 17. sealing groove. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0032] The specific implementation of the present invention is as follows: Figure 1-14 As shown, a rocker arm seat and rocker arm shaft assembly includes a seat body 1, two positioning bosses 2 are provided on both sides of the seat body 1, two hinge shafts 3 are installed on the two positioning bosses 2, two parallel rocker arm shafts 4 are rotatably provided on the two hinge shafts 3, an oil groove 5 is provided at the bottom end of the seat body 1, locking bolts 6 are provided on the two hinge shafts 3 and extend into the oil groove 5 through the positioning bosses 2, and a sealing ring 7 arranged around the oil groove 5 is provided on the bottom surface of the seat body 1.

[0033] In the present rocker arm seat and rocker arm shaft assembly, two articulated shafts 3 are passed through two rocker arm shafts 4 for controlling valve intake or exhaust, and then the middle part of the articulated shaft 3 is clamped on the positioning boss 2, the articulated shaft 3 and the positioning boss 2 are in surface contact, and then the articulated shaft 3 and the positioning boss 2 are locked by the locking bolt 6. As long as the articulated shaft 3 is locked, the rocker arm shaft 4 can be limited axially and radially. The articulated shaft 3 and the rocker arm shaft 4 are in arc surface contact, ensuring that the axial force of the locking bolt 6 that tightens the rocker arm shaft and the rocker arm seat does not decay during long-term use of the diesel engine.

[0034] The hinge shaft 3 and the rocker shaft 4 are assembled on the seat body 1 in a stacking manner, which has good assembly processability and maintainability, and can ensure that the two structures are in surface contact when limiting, with a large contact area and firm locking.

[0035] An oil groove 5 is provided at the bottom end of the seat body 1, and the oil groove 5 is connected to the holes passed by the two locking bolts 6, thereby connecting the lubricating oil channel; the setting of the sealing ring 7 can prevent the leakage of the lubricating oil and form a sealed oil channel; each positioning boss 2 is a square boss, and the width dimensions of the two side surfaces are ensured by machining, and have a high degree of symmetry relative to the center axis of the hole.

[0036] In this embodiment, a slot 8 matching the positioning boss 2 is provided at the bottom end of the middle part of the hinge shaft 3, and a positioning plane positioned corresponding to the head of the locking bolt 6 is provided at the top end of the middle part of the hinge shaft 3. The hinge shaft 3 cooperates with the positioning boss 2 through the slot 8, and the groove walls on both sides of the slot 8 are in close contact with the two side surfaces of the positioning boss 2, and the top surface of the slot 8 is in contact with the top surface of the positioning boss 2, so that the contact surface between the hinge shaft 3 and the positioning boss 2 is a plane; a clearance groove for accommodating the head of the locking bolt 6 is provided at the top end of the middle part of the hinge shaft 3.

[0037] In this embodiment, a positioning groove 9 adapted to the two side surfaces of the positioning boss 2 is provided through the rocker shaft 4, and the two side groove walls of the positioning groove 9 are provided with hinge holes 10 adapted to the two ends of the hinge shaft 3. The hinge shaft 3 is arranged through the two side groove walls of the positioning groove 9. The two side groove walls of the positioning groove 9 can limit the two side surfaces of the positioning boss 2 to each other to prevent the rocker shaft 4 from lateral displacement. The positioning groove 9 is for the locking bolt 6 to pass through, and will not interfere with the locking bolt 6 when the rocker shaft 4 rotates.

[0038] In this embodiment, the front end of the rocker arm shaft 4 is open and provided with a mounting groove, a pin shaft 11 is provided in the mounting groove, and a roller 12 is provided on the pin shaft 11 .

[0039] In this embodiment, a through hole 13 adapted to the locking bolt 6 is provided on the positioning boss 2, the through hole 13 is a smooth hole, a positioning hole 14 connected to the oil groove 5 is provided at the bottom end of the through hole 13, a first elastic positioning sleeve 15 is provided on the positioning hole 14, and a second elastic positioning sleeve 16 connected to the inner hole of the rocker shaft 4 is inserted at the top of the through hole 13.

[0040] A notch adapted to the oil groove 5 is provided on one side of the first elastic positioning sleeve 15 so that the oil passage in the positioning hole 14 is connected to the oil groove 5 and the oil groove 5 is ensured to be opened between the two smooth through holes 13 on the lower end surface of the seat body 1 without being blocked.

[0041] The second elastic positioning sleeve 16 is installed on the positioning boss 2 , and then the hinge shaft 3 is sleeved on the second elastic positioning sleeve 16 , so that the hinge shaft 3 is conveniently assembled on the positioning boss 2 .

[0042] In this embodiment, a sealing groove 17 is provided on the bottom surface of the seat body 1 and is arranged around the positioning hole 14 and the oil groove 5 , and the sealing ring 7 is matched with the sealing groove 17 .

[0043] In this embodiment, the central axes of the two rocker arm shafts 4 are parallel, and the two positioning bosses 2 are square bosses protruding from the seat body 1 .

[0044] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A rocker arm seat and rocker arm shaft assembly, comprising a seat body (1), characterized in that: Two positioning bosses (2) are provided on both sides of the seat body (1), two hinge shafts (3) are installed on the two positioning bosses (2), two rocker shafts (4) arranged in parallel are rotatably provided on the two hinge shafts (3), an oil groove (5) is provided at the bottom end of the seat body (1), locking bolts (6) are provided on the two hinge shafts (3) and pass through the positioning bosses (2) and extend into the oil groove (5), a sealing ring (7) is provided on the bottom surface of the seat body (1) and is arranged around the oil groove (5), a clamping groove (8) adapted to the positioning boss (2) is provided at the bottom end of the middle part of the hinge shaft (3), a positioning plane is provided at the top end of the middle part of the hinge shaft (3) and is positioned with the head of the locking bolt (6), and a sealing ring (7) is provided on the bottom surface of the seat body (1) and is arranged around the oil groove (5), A positioning groove (9) adapted to the two side surfaces of the positioning boss (2) is provided, and the groove walls on both sides of the positioning groove (9) are provided with hinge holes (10) adapted to the two ends of the hinge shaft (3). The front end of the rocker shaft (4) is open and provided with a mounting groove, a pin shaft (11) is provided in the mounting groove, and a roller (12) is provided on the pin shaft (11). A through hole (13) adapted to the locking bolt (6) is provided on the positioning boss (2), a positioning hole (14) connected to the oil groove (5) is provided at the bottom end of the through hole (13), a first elastic positioning sleeve (15) is provided on the positioning hole (14), and a second elastic positioning sleeve (16) inserted into the inner hole of the rocker shaft (4) is inserted at the top of the through hole (13).

2. A rocker arm seat and rocker arm shaft assembly according to claim 1, characterized in that: A notch adapted to the oil groove (5) is provided on one side of the first elastic positioning sleeve (15).

3. A rocker arm seat and rocker arm shaft assembly according to claim 1, characterized in that: A sealing groove (17) is provided on the bottom surface of the seat body (1) and is arranged around the positioning hole (14) and the oil groove (5), and the sealing ring (7) is adapted to the sealing groove (17).

4. A rocker arm seat and rocker arm shaft assembly according to claim 1, characterized in that: The central axes of the two rocker arm shafts (4) are parallel, and the two positioning bosses (2) are square bosses protruding from the seat body (1).

5. A rocker arm seat and rocker arm shaft assembly according to claim 4, characterized in that: The groove wall of the clamping groove (8) at the bottom of the hinge shaft (3) is adapted to the two side surfaces of the positioning boss (2).

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