Central valve body structure of cam phase regulator

Abstract

The central valve body structure of the cam phase regulator comprises a valve shell, a spring seat and a one-way valve, the valve shell is cylindrical, an oil inlet hole and an oil outlet hole are formed in the two ends of the valve shell respectively, and a valve element is coaxially arranged in the valve shell in a sliding mode; the spring seat is arranged in the valve shell, and a reset spring is coaxially clamped between the spring seat and the valve element. The one-way valve comprises a sealing cover part and a ball plug part, the sealing cover part is used for sealing the oil inlet hole, and an oil flushing hole is formed in the middle of the sealing cover part in a penetrating mode. The ball plug part is cylindrical, one end of the ball plug part and the sealing cover part are integrally formed so that the ball plug part can be communicated with the oil flushing hole, the other end of the ball plug part can be connected with the spring seat in a clamped mode, a plurality of oil discharging holes are formed in the side wall of the ball plug part in a penetrating mode, a plug ball is arranged in the ball plug part, and a one-way valve spring is arranged between the plug ball and the spring seat in a clamped mode so that the plug ball can extrude and seal the oil flushing hole. The problems that an existing central valve body is complex in structure, difficult to assemble, high in cost and low in reliability can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil control valve in automobile engine timing system, concretely relates to a central valve body structure of cam phase regulator. BACKGROUND

[0002] VVT (Variable Valve Timing, variable valve timing) technology is a common technology in modern automobile engines, which adjusts the opening and closing time of engine valves to optimize engine performance, fuel efficiency and emissions. One of the core components of VVT is the cam phase regulator. The cam phase regulator is one of the key components in the VVT system, which is responsible for adjusting the position of the engine camshaft to change the opening and closing time of the valve. By adjusting the phase of the camshaft (i.e. the angular relationship between the camshaft and the crankshaft), the phase regulator can optimize the valve timing at different engine speeds and loads.

[0003] The central valve body is one of the core components of the cam phase regulator, responsible for the distribution and direction control of hydraulic fluid. In the hydraulic system, the valve body controls the action of the actuator by controlling the direction of oil flow. The central valve body contains multiple valve holes and control channels inside, which control the direction, speed and pressure of fluid flow by adjusting the opening and closing state of these channels.

[0004] The existing central valve body for cam phase regulator generally has the following problems: the integration of spring seat and one-way valve is low, which leads to complex central valve body structure, difficult assembly, high cost and low reliability. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a central valve body structure of cam phase regulator, which can solve the problems of complex central valve body structure, difficult assembly, high cost and low reliability.

[0006] The utility model realizes the following technical scheme:

[0007] The application discloses a central valve body structure of a cam phase regulator, which comprises a valve shell, an oil inlet hole and an oil outlet hole are formed at two ends of the valve shell, a valve core is coaxially arranged in the valve shell, a spring seat is arranged in the valve shell, a reset spring is coaxially arranged between the spring seat and the valve core, a one-way valve comprises a cover part and a ball plug part, the cover part is used for closing the oil inlet hole, a flushing oil hole is formed in the middle of the cover part, the ball plug part is cylindrical, one end of the ball plug part is integrally formed with the cover part, so that the ball plug part is communicated with the flushing oil hole, the other end of the ball plug part is connected with the spring seat, a plurality of oil discharge holes are formed in the side wall of the ball plug part, a plug ball is arranged in the ball plug part, a one-way valve spring is arranged between the plug ball and the spring seat, so that the plug ball is pressed to close the flushing oil hole.

[0008] Optionally, the spring seat is cylindrical, the spring seat is coaxially arranged in the valve shell, an insertion slot is coaxially formed in one end of the spring seat close to the valve core, the insertion slot is matched with and aligned with the end of the valve core, a first spring slot is coaxially formed in one end of the valve core close to the spring seat, one end of the reset spring is coaxially sleeved in the first spring slot and abuts against the bottom of the first spring slot, and the other end of the reset spring abuts against the bottom of the insertion slot.

[0009] Optionally, a ring slot is coaxially formed in the bottom of the insertion slot, the ring slot is matched with the reset spring, and one end of the reset spring is embedded in the ring slot.

[0010] Optionally, a second spring slot is coaxially formed in one end of the spring seat close to the one-way valve, the diameter of the second spring slot is smaller than the inner diameter of the ball plug part, one end of the one-way valve spring is coaxially sleeved in the second spring slot, and the other end of the one-way valve spring is in contact with and pressed against the plug ball.

[0011] Optionally, a plurality of clamping claws are protruded from the side wall of one end of the spring seat close to the one-way valve, and the clamping claws are annularly and uniformly distributed, the side wall of the other end of the ball plug part away from the cover part is outwardly extended to form a clamping edge, and the clamping claws can be clamped with the clamping edge.

[0012] Optionally, a clamping groove is formed by outwardly digging the slot opening of the second spring slot, the diameter of the clamping groove is matched with the outer diameter of the ball plug part, when the clamping claws are clamped with the clamping edge, the end surface of the clamping edge is abutted against the end surface of the spring seat, and the end of the ball plug part is embedded in the clamping groove.

[0013] Optionally, the valve sleeve is coaxially sleeved in the valve housing, the valve sleeve is cylindrical, the valve sleeve is coaxially connected by a fixed part and a mounting part, the inner diameter of the mounting part matches the outer diameter of the spring seat and is sleeved, and the outer diameter of the fixed part matches the inner diameter of the valve housing; a plurality of first oil holes are through-opened in the fixed part along the thickness direction, a plurality of second oil holes are through-opened in the mounting part along the thickness direction; a plurality of oil inlet channels are through-opened in the mounting part along the thickness direction, and the oil inlet channels pass through the end surface of the mounting part along the axial direction; a plurality of third oil holes and a plurality of fourth oil holes are through-opened in the side wall of the valve housing along the thickness direction, the third oil holes correspond to and align with the first oil holes one by one, and the fourth oil holes correspond to and align with the second oil holes one by one; the valve core is coaxially and slidably sleeved in the valve sleeve, the valve core is hollow, and a plurality of leakage holes are through-opened at the end of the valve core away from the spring seat; when the reset spring is in a natural state, the valve core is in a first working position, and the oil inlet hole, the oil impact hole, the oil discharge hole, the oil inlet channel, the first oil hole, the third oil hole, the fourth oil hole, the second oil hole, the leakage hole and the oil outlet hole are connected to form a first oil path; when the valve core is inserted into the insertion slot, the valve core is in a second working position, and the oil inlet hole, the oil impact hole, the oil discharge hole, the oil inlet channel, the second oil hole, the fourth oil hole, the third oil hole, the first oil hole and the oil outlet hole are connected to form a second oil path.

[0014] Optionally, two bushings are coaxially sleeved in the valve sleeve, the bushings are cylindrical, the outer diameter of the bushings matches the inner diameter of the valve sleeve, and a plurality of inner oil holes are through-opened in the bushings along the thickness direction; the two bushings are sleeved in the fixed part and the mounting part respectively, and the inner oil holes correspond to, align with and communicate with the corresponding first oil holes and the corresponding second oil holes one by one.

[0015] Optionally, the end surface of the bushing is provided with a limiting groove, the inner wall of the valve sleeve is provided with a limiting block, and the limiting block corresponds to and is clamped with the limiting groove one by one.

[0016] Optionally, the side wall of the valve core is outwardly convex to form a plugging disc, and the plugging disc can partially plug the inner oil hole to switch between the first oil path and the second oil path.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] The utility model provides a kind of central valve body structure of cam phase regulator, by setting valve shell, valve core, spring seat and check valve, realize the basic function of central valve body, on this basis, by clamping reset spring between spring seat and valve core, when extruding reset spring to adjust the working state of central valve body, so as to reset by the elasticity of reset spring, and spring seat can limit the axial sliding end point of valve core (i.e. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the embodiments of the utility model, form part of the present application, and do not constitute limitation to the embodiments of the utility model.In the drawings:

[0020] Figure 1 It is the half cutout schematic view of the central valve body structure of cam phase regulator provided for the embodiments of the utility model;

[0021] Figure 2 It is the schematic diagram of spring seat of the central valve body structure of cam phase regulator provided for the embodiments of the utility model;

[0022] Figure 3 It is the half cutout schematic view of spring seat of the central valve body structure of cam phase regulator provided for the embodiments of the utility model;

[0023] Figure 4 It is the schematic diagram of check valve of the central valve body structure of cam phase regulator provided for the embodiments of the utility model;

[0024] Figure 5 It is the half cutout schematic view of check valve of the central valve body structure of cam phase regulator provided for the embodiments of the utility model;

[0025] Figure 6The half-section schematic view of the one-way valve of the central valve body structure of the cam phase regulator is provided in the embodiment of the utility model;

[0026] Figure 7 The half-section schematic view of the one-way valve of the central valve body structure of the cam phase regulator is provided in the embodiment of the utility model;

[0027] Figure 8 The schematic view of the valve sleeve of the central valve body structure of the cam phase regulator is provided in the embodiment of the utility model;

[0028] Figure 9 The half-section schematic view of the valve sleeve of the central valve body structure of the cam phase regulator is provided in the embodiment of the utility model;

[0029] Figure 10 The schematic view of the bushing of the central valve body structure of the cam phase regulator is provided in the embodiment of the utility model;

[0030] Figure 11 The schematic view of the valve sleeve and the bushing of the central valve body structure of the cam phase regulator after assembly is provided in the embodiment of the utility model;

[0031] Figure 12 The half-section schematic view of the central valve body structure of the cam phase regulator along the first oil path is provided in the embodiment of the utility model;

[0032] Figure 13 The half-section schematic view of the central valve body structure of the cam phase regulator along the first oil path is provided in the embodiment of the utility model.

[0033] Markings in the drawings and corresponding component names:

[0034] 10-valve shell; 11-oil inlet hole; 12-oil outlet hole; 13-valve core; 131-first spring groove; 132-drain hole; 133-plugging disc; 14-third oil hole; 15-fourth oil hole; 20-spring seat; 21-return spring; 22-insert slot; 23-ring groove; 24-second spring groove; 241-embedding groove; 25-claw; 30-one-way valve; 31-capping part; 311-oil flushing hole; 32-ball plug part; 321-oil discharge hole; 322-clamping edge; 33-plug ball; 34-one-way valve spring; 40-valve sleeve; 41-first oil hole; 42-second oil hole; 43-oil inlet channel; 44-limiting block; 50-bushing; 51-inner oil hole; 52-limiting groove. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below by combining with examples and drawings, the schematic implementation mode and the description of the utility model are only used for explaining the utility model, and do not serve as the limitation of the utility model.

[0036] Embodiment

[0037] Please refer to Figures 1 to 13 The embodiment provides a central valve body structure of a cam phase regulator, which comprises a valve shell 10, the valve shell 10 is in a cylindrical shape, oil inlet holes 11 and oil outlet holes 12 are formed at two ends respectively, a valve core 13 is coaxially arranged in the valve shell 10; a spring seat 20 is further included, the spring seat 20 is arranged in the valve shell 10, a reset spring 21 is coaxially clamped between the spring seat 20 and the valve core 13; a one-way valve 30 is further included, the one-way valve 30 comprises a cover part 31 and a ball plug part 32, the cover part 31 is used for closing the oil inlet holes 11, a flushing oil hole 311 is formed in the middle of the cover part 31; the ball plug part 32 is in a cylindrical shape, one end of the ball plug part 32 is integrally formed with the cover part 31, so that the ball plug part 32 is communicated with the flushing oil hole 311, the other end is clamped with the spring seat 20, a plurality of oil discharge holes 321 are formed in the side wall of the ball plug part 32, a plug ball 33 is arranged in the ball plug part 32, a one-way valve spring 34 is clamped between the plug ball 33 and the spring seat 20, so that the plug ball 33 is pressed to close the flushing oil hole 311.

[0038] The central valve body structure of the cam phase regulator provided by the embodiment realizes the basic function of the central valve body by arranging the valve shell 10, the valve core 13, the spring seat 20 and the one-way valve 30, and on this basis, the reset spring 21 is clamped between the spring seat 20 and the valve core 13, the valve core 13 is axially slid, the reset spring 21 is extruded when the working state of the central valve body is adjusted, so as to reset through the elasticity of the reset spring 21, and the spring seat 20 can limit the axial sliding end point of the valve core 13 (that is, the two are in contact); the one-way valve 30 is arranged to include the cover part 31 and the ball plug part 32, the cover part 31 is used to one-way seal the oil inlet hole 11, so that the oil flowing into the oil inlet hole 11 must flow out through the one-way valve 30, the plug ball 33 and the one-way valve spring 34 are arranged in the ball plug part 32, the plug ball 33 is pressed by the one-way valve spring 34 to one-way seal the oil flushing hole 311, when the oil pressure is greater than the threshold value, the one-way valve spring 34 is compressed, the plug ball 33 is away from the oil flushing hole 311, the oil flows into the ball plug part 32 through the oil flushing hole 311, and then flows out from the ball plug part 32 to the valve shell 10 in one-way through the oil outlet hole 321 along the flow channel in the valve shell 10; the spring seat 20 is integrated with the functions of limiting the valve core 13, cooperating with the reset spring 21, cooperating with the one-way valve spring 34 and limiting the displacement of the plug ball 33, and the one-way valve 30 inherits the functions of being internally provided with a channel, guiding the plug ball 33 and directly forming a seal with the plug ball 33; through the mutual cooperation of the above-mentioned characteristics, the integration of the spring seat 20 and the one-way valve 30 is effectively improved, so that the central valve body structure of the cam phase regulator can effectively solve the problems of complex central valve body structure, difficult assembly, high cost and low reliability.

[0039] In order to further explain the specific structure of the spring seat 20, the spring seat 20 is cylindrical, the spring seat 20 is coaxially arranged in the valve shell 10, one end of the spring seat 20 close to the valve core 13 is coaxially provided with an insertion slot 22, the insertion slot 22 is matched and aligned with the end part of the valve core 13; one end of the valve core 13 close to the spring seat 20 is coaxially provided with a first spring slot 131, one end of the reset spring 21 is coaxially sleeved in the first spring slot 131, and the other end is in abutment with the bottom of the insertion slot 22.

[0040] The insertion slot 22 is arranged to axially and radially limit the valve core 13, and the first spring slot 131 is arranged to accommodate the extruded reset spring 21, so that the end part of the valve core 13 can be inserted into the insertion slot 22 and abut with the bottom of the insertion slot 22.

[0041] In order to radially limit the reset spring 21, the bottom of the insertion slot 22 is coaxially provided with a ring groove 23, the ring groove 23 is matched with the reset spring 21, and one end of the reset spring 21 is embedded in the ring groove 23.

[0042] To further explain the connection structure of the one-way valve spring 34 and the spring seat 20, the spring seat 20 is coaxially provided with a second spring groove 24 near one end of the one-way valve 30, the diameter of the second spring groove 24 is smaller than the inner diameter of the ball plug part 32, one end of the one-way valve spring 34 is coaxially sleeved in the second spring groove 24, and the other end is in contact with and pressed against the plug ball 33.

[0043] By providing the second spring groove 24, the compressed one-way valve spring 34 can be pressed into the second spring groove 24, at this time, the plug ball 33 can be in abutment with the notch of the second spring groove 24, thereby limiting the plug ball 33 and preventing it from moving excessively.

[0044] To further explain the connection structure of the spring seat 20 and the one-way valve 30, the side wall of the spring seat 20 near one end of the one-way valve 30 is provided with a plurality of clamping claws 25, all the clamping claws 25 are annularly and uniformly distributed; the side wall of the ball plug part 32 away from the cover part 31 is outwardly extended to form a clamping edge 322, and the clamping claws 25 can be clamped with the clamping edge 322.

[0045] To further limit the radial position of the ball plug part 32, the notch of the second spring groove 24 is outwardly excavated to form an embedding groove 241, the diameter of the embedding groove 241 matches the outer diameter of the ball plug part 32; when the clamping claws 25 are clamped with the clamping edge 322, the end face of the clamping edge 322 is in abutment with the end face of the spring seat 20, and the end part of the ball plug part 32 is embedded in the embedding groove 241.

[0046] By providing the embedding groove 241, when the clamping claws 25 are clamped with the clamping edge 322, the end part of the ball plug part 32 is inserted into the embedding groove 241, thereby limiting unnecessary radial deviation thereof, and by providing the end face of the clamping edge 322 in abutment with the end face of the spring seat 20, the axial positioning and limiting of the ball plug part 32 and the spring seat 20 are realized, thereby preventing unnecessary axial relative movement of the two.

[0047] In order to specifically explain the flow channel structure in the valve housing 10, the valve housing 10 is coaxially sleeved with a valve sleeve 40, the valve sleeve 40 is in a cylindrical shape, the valve sleeve 40 is coaxially connected by a fixed part and a mounting part, the inner diameter of the mounting part matches the outer diameter of the spring seat 20 and is sleeved, and the outer diameter of the fixed part matches the inner diameter of the valve housing 10; a plurality of first oil holes 41 are through-opened in the thickness direction of the fixed part, a plurality of second oil holes 42 are through-opened in the thickness direction of the mounting part; a plurality of oil inlet channels 43 are through-opened in the thickness direction of the mounting part, and the oil inlet channels 43 pass through the end surface of the mounting part in the axial direction; a plurality of third oil holes 14 and a plurality of fourth oil holes 15 are through-opened in the thickness direction of the side wall of the valve housing 10, the third oil holes 14 correspond to and align with the first oil holes 41 one by one, and the fourth oil holes 15 correspond to and align with the second oil holes 42 one by one; the valve core 13 is coaxially and slidingly sleeved in the valve sleeve 40, the valve core 13 is hollow, and a plurality of leakage holes 132 are through-opened at the end of the valve core 13 away from the spring seat 20; when the reset spring 21 is in a natural state, the valve core 13 is in a first working position, and the oil inlet hole 11, the oil impact hole 311, the oil discharge hole 321, the oil inlet channel 43, the first oil hole 41, the third oil hole 14, the fourth oil hole 15, the second oil hole 42, the leakage hole 132 and the oil outlet hole 12 are communicated to form a first oil path; when the valve core 13 is inserted into the insertion slot 22, the valve core 13 is in a second working position, and the oil inlet hole 11, the oil impact hole 311, the oil discharge hole 321, the oil inlet channel 43, the second oil hole 42, the fourth oil hole 15, the third oil hole 14, the first oil hole 41 and the oil outlet hole 12 are communicated to form a second oil path.

[0048] Through the above arrangement, by using the axial movement of the valve core 13, the communication positions and through hole flow rates of the above-mentioned oil holes (especially the first oil holes 41, the second oil holes 42, the third oil holes 14 and the fourth oil holes 15) are changed, thereby forming the first oil path and the second oil path in the valve housing 10.

[0049] In order to further optimize the structure of the valve sleeve 40, two bushings 50 are coaxially sleeved in the valve sleeve 40, the bushings 50 are in a cylindrical shape, the outer diameter of the bushings 50 matches the inner diameter of the valve sleeve 40, and a plurality of inner oil holes 51 are through-opened in the thickness direction of the bushings 50; the two bushings 50 are respectively sleeved in the fixed part and the mounting part, and the inner oil holes 51 correspond to, align with and communicate with the corresponding first oil holes 41 and the corresponding second oil holes 42 one by one.

[0050] In order to position the installation of the bushing 50, limit grooves 52 are opened on the end surface of the bushing 50, limit blocks 44 are protruded on the inner wall of the valve sleeve 40, and the limit blocks 44 correspond to and are clamped with the limit grooves 52 one by one.

[0051] To make a specific explanation of the structure for changing the oil hole communication mode of the valve core 13, the side wall of the valve core 13 is outwardly convex to form a blocking disc 133 capable of partially blocking the inner oil hole 51 to switch between the first oil passage and the second oil passage.

[0052] It should be noted that the diameter of the blocking disc 133 matches the inner diameter of the bushing 50.

[0053] The above specific embodiments explain the purpose, technical solutions and beneficial effects of the present application in further detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A center valve body structure of a cam phase regulator, characterized by, The utility model relates to a valve, including: Valve shell (10), the valve shell (10) is cylindrical, forms oil inlet hole (11) and oil outlet hole (12) respectively at both ends, the valve core (13) is coaxially arranged in the valve shell (10); Spring seat (20), the spring seat (20) is arranged in the valve shell (10), reset spring (21) is coaxially clamped between the spring seat (20) and the valve core (13); One-way valve (30), the one-way valve (30) includes cover part (31) and ball plug part (32), the cover part (31) is used for closing the oil inlet hole (11), the middle part of the cover part (31) is opened through the oil hole (311); the ball plug part (32) is cylindrical, one end of the ball plug part (32) is integrally formed with the cover part (31), so that the ball plug part (32) is communicated with the oil hole (311), the other end is connected with the spring seat (20), the sidewall of the ball plug part (32) is opened through a plurality of oil discharge holes (321), the ball plug part (32) is provided with plug ball (33), the plug ball (33) is clamped with the spring seat (20) between one-way valve spring (34), so that the plug ball (33) extrusion closes the oil hole (311).

2. The central valve body structure of a cam phase regulator according to claim 1, characterized in that, The spring seat (20) is cylindrical, the spring seat (20) is coaxially arranged in the valve shell (10), the spring seat (20) is coaxially opened with the insertion slot (22) at one end close to the valve core (13), the insertion slot (22) is matched and aligned with the end of the valve core (13); The valve core (13) is coaxially opened with the first spring groove (131) at one end close to the spring seat (20), one end of the reset spring (21) is coaxially sleeved in the first spring groove (131), and the other end is in contact with the bottom of the insertion slot (22).

3. The central valve body structure of a cam phase regulator according to claim 2, characterized in that The bottom of the insertion slot (22) is coaxially opened with the ring groove (23), the ring groove (23) is matched with the reset spring (21), and one end of the reset spring (21) is embedded in the ring groove (23).

4. The central valve body structure of a cam phase regulator according to claim 2, characterized by The spring seat (20) is coaxially opened with the second spring groove (24) at one end close to the one-way valve (30), the diameter of the second spring groove (24) is smaller than the inner diameter of the ball plug part (32), one end of the one-way valve spring (34) is coaxially sleeved in the second spring groove (24), and the other end is in contact with and extruded by the plug ball (33).

5. The central valve body structure of a cam phase regulator according to claim 4, characterized in that The sidewall of the spring seat (20) at one end close to the one-way valve (30) is provided with a plurality of clamping claws (25), and all the clamping claws (25) are annularly and uniformly distributed; The sidewall of the ball plug part (32) at one end away from the cover part (31) extends outward to form a clamping edge (322), and the clamping claws (25) can be clamped with the clamping edge (322).

6. The central valve body structure of a cam phase regulator according to claim 5, characterized in that The notch of the second spring groove (24) is outwardly excavated to form an embedding groove (241), and the diameter of the embedding groove (241) is matched with the outer diameter of the ball plug part (32). When the claw (25) is clamped with the clamping edge (322), the end face of the clamping edge (322) abuts against the end face of the spring seat (20), and the end of the ball plug part (32) is embedded in the embedding groove (241).

7. The central valve body structure of a cam phase regulator according to claim 6, characterized in that The valve sleeve (40) is coaxially sleeved in the valve housing (10), the valve sleeve (40) is cylindrical, the valve sleeve (40) is coaxially connected by a fixed part and a mounting part, the inner diameter of the mounting part matches the outer diameter of the spring seat (20) and is sleeved, and the outer diameter of the fixed part matches the inner diameter of the valve housing (10); The fixed part is provided with a plurality of first oil holes (41) penetrating through in the thickness direction, and the mounting part is provided with a plurality of second oil holes (42) penetrating through in the thickness direction; The mounting part is provided with a plurality of oil inlet channels (43) penetrating through in the thickness direction, and the oil inlet channels (43) penetrate through the end face of the mounting part in the axial direction; The side wall of the valve housing (10) is provided with a plurality of third oil holes (14) and a plurality of fourth oil holes (15) penetrating through in the thickness direction, the third oil holes (14) correspond to and align with the first oil holes (41), and the fourth oil holes (15) correspond to and align with the second oil holes (42); The valve core (13) is coaxially and slidably sleeved in the valve sleeve (40), the valve core (13) is hollow, and a plurality of leakage holes (132) are penetratingly formed in one end of the valve core (13) away from the spring seat (20); When the reset spring (21) is in a natural state, the valve core (13) is in a first working position, the oil inlet hole (11), the oil punching hole (311), the oil discharging hole (321), the oil inlet channel (43), the first oil hole (41), the third oil hole (14), the fourth oil hole (15), the second oil hole (42), the leakage hole (132) and the oil outlet hole (12) are communicated to form a first oil path; When the valve core (13) is inserted into the insertion slot (22), the valve core (13) is in a second working position, the oil inlet hole (11), the oil punching hole (311), the oil discharging hole (321), the oil inlet channel (43), the second oil hole (42), the fourth oil hole (15), the third oil hole (14), the first oil hole (41) and the oil outlet hole (12) are communicated to form a second oil path.

8. The central valve body structure of a cam phase regulator according to claim 7, characterized in that The valve sleeve (40) is coaxially sleeved with two bushings (50), the bushing (50) is cylindrical, the outer diameter of the bushing (50) matches the inner diameter of the valve sleeve (40), and the bushing (50) is provided with a plurality of inner oil holes (51) penetrating through in the thickness direction; The two bushings (50) are respectively sleeved in the fixed part and the mounting part, the inner oil holes (51) correspond to, align with and communicate with the corresponding first oil holes (41) and the corresponding second oil holes (42) one by one.

9. The central valve body structure of a cam phase regulator according to claim 8, characterized in that The end face of the bushing (50) is provided with a limiting groove (52), the inner wall of the valve sleeve (40) is provided with a limiting block (44), and the limiting block (44) corresponds to and clamps the limiting groove (52) one by one.

10. The central valve body structure of a cam phase regulator according to claim 9, characterized in that The side wall of the valve core (13) is outwardly convex to form a blocking disc (133), which can partially block the inner oil hole (51) to switch between the first oil path and the second oil path.

Images