Variable adjusting structure for hydraulic variable valve control mechanism

Abstract

The utility model discloses a variable adjusting structure for a hydraulic variable valve control mechanism, which comprises a motor, a shifting fork shaft, a shifting fork, a control valve sleeve, a control valve core and a valve core driving tappet, the control valve sleeve is arranged on the shifting fork shaft through the shifting fork, a straight groove is arranged on the shifting fork, a ball body is arranged on the control valve sleeve, and the valve core driving tappet is arranged on the ball body. The ball body slides in the straight groove; the shifting fork shaft is connected with a motor through a worm and gear mechanism; according to the multi-cylinder hydraulic variable valve control mechanism, the multi-cylinder hydraulic variable valve control mechanism is installed on the same shifting fork shaft through the shifting fork, variable adjustment of the multiple hydraulic variable valve control mechanisms is achieved through rotation of the shifting fork shaft, and compared with an existing one-cylinder and one-motor control mode, the structure of a control system is simplified, and meanwhile cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic variable valve control mechanisms, and in particular relates to a variable adjustment structure used for hydraulic variable valve control mechanisms. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The engine valves are usually driven by the camshaft. For ordinary engines without variable valve timing technology, the opening and closing time of the intake and exhaust valves are fixed, but this fixed valve timing is difficult to take into account the needs of the engine at different speeds and working conditions. The process of engine intake and exhaust is like human breathing, but the fixed "breathing" rhythm hinders the improvement of engine efficiency.

[0004] A hydraulic variable valve control mechanism for an engine in the prior art is as follows Figure 7 As shown, a control method of one cylinder and one motor is adopted. Although this control method is relatively flexible, it has the following disadvantages. First, the large number of motors causes the cost of the entire variable valve system to be relatively high, and the control system is also relatively complex, with more leads and more fault points; second, the motor is fixed on the variable valve body, and the part inside the cylinder head cover has poor heat dissipation effect on the one hand, and on the other hand, the variable valve body will transfer heat to the motor, resulting in poor motor reliability; third, half of the motor is inside the cylinder head cover and half is outside the cylinder head cover, which makes assembly more difficult. Utility Model Content

[0005] The utility model aims to provide a variable adjustment structure for a hydraulic variable valve control mechanism, which controls a multi-cylinder variable valve control mechanism through a motor, thereby simplifying the structure and improving the working efficiency.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a variable adjustment structure for a hydraulic variable valve control mechanism, comprising a motor, a fork shaft, a fork, a control valve sleeve, a control valve core and a valve core driving tappet, wherein the control valve sleeve is mounted on the fork shaft through a fork, a straight groove is provided on the fork, a ball is provided on the control valve sleeve, and the ball slides in the straight groove; the fork shaft is connected to the motor through a worm gear mechanism.

[0008] As a further technical solution, a worm is arranged on the output shaft of the motor, a worm wheel is arranged on the fork shaft, the worm and the worm wheel are meshed, and the motor drives the fork shaft to rotate.

[0009] As a further technical solution, the shift fork comprises a fixed portion and a fork body portion, and the fixed portion and the fork body portion are an integrally connected structure.

[0010] As a further technical solution, the fixed part is provided with a first circular through hole and a second circular through hole, the first circular through hole is used to install the fork shaft, and a locking screw is installed in the second circular through hole to fix the fork on the fork shaft.

[0011] As a further technical solution, the straight groove is arranged on the fork body part of the shift fork, the straight groove is arranged in an open manner, and the width of the straight groove matches the diameter of the sphere.

[0012] As a further technical solution, the sphere is connected to the outer periphery of the control valve sleeve via a connecting block, and the control valve sleeve and the connecting block are arranged as an integral structure.

[0013] As a further technical solution, the sphere is a steel ball fixed on the end face of the connecting block by welding.

[0014] As a further technical solution, the control valve core is installed in the control valve sleeve, and the control valve core is meshed with the valve core driving tappet through a tooth structure.

[0015] As a further technical solution, the control valve core is provided with gear teeth, and the control valve core driving tappet is provided with spur teeth, and the gear teeth and spur teeth are meshed with each other.

[0016] As a further technical solution, a plurality of variable valve control mechanism bodies are installed on the fork shaft, and each variable valve control mechanism body corresponds to one engine cylinder.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The variable adjustment structure provided by the utility model installs the hydraulic variable valve control mechanisms of multiple cylinders on the same fork shaft through a fork, and realizes the variable adjustment of multiple hydraulic variable valve control mechanisms through the rotation of the fork shaft. Compared with the existing control method of one cylinder and one motor, it simplifies the control system structure and reduces the cost.

[0019] The utility model provides a variable adjustment structure in which the motor drives the rotation of the fork shaft through a worm gear mechanism, thereby realizing simultaneous adjustment of the hydraulic variable valve control mechanisms of multiple cylinders. At the same time, the structure arranges the motor as a whole outside the cylinder head cover, the motor has a better heat dissipation function, and the performance of the motor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a structural schematic diagram of the multi-cylinder variable valve control mechanism in the utility model;

[0022] Figure 2 It is a structural schematic diagram of the variable adjustment structure in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the shift fork in the variable adjustment structure of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the control valve sleeve in the variable adjustment structure of the utility model;

[0025] Figure 5 It is a schematic diagram of the structure of the cooperation between the shift fork and the control valve of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the main body of the variable valve control mechanism of the utility model;

[0027] Figure 7 It is a hydraulic variable valve control mechanism in the prior art.

[0028] The schematic diagram is for illustrative purposes only;

[0029] Among them, 1. variable valve control mechanism body; 2. motor; 3. fork shaft; 4. fork; 5. locking screw; 6. single-cylinder control motor; 7. housing; 11. control valve core; 12. valve core driving tappet; 13. control valve sleeve; 14. connecting block; 15. ball; 21. worm; 31. worm wheel; 41. fixed part; 42. fork body part; 43. first circular through hole; 44. second circular through hole; 45. straight groove. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] Example 1

[0032] In a typical embodiment of the present invention, a variable adjustment structure for a hydraulic variable valve control mechanism is provided, such as Figure 1-6As shown, it includes a motor 2, a fork shaft 3, a fork 4, a control valve sleeve 13, a control valve core 11 and a valve core driving tappet 12. The control valve sleeve 13 of the variable valve control mechanism body 1 is installed on the fork shaft 3 through the fork 4. The fork 4 is provided with a straight groove 45. The control valve sleeve 13 is provided with a ball 15. The ball 15 slides in the straight groove 45. The fork shaft 3 is connected to the motor 2 through a worm gear mechanism.

[0033] like Figure 2 As shown, a worm 21 is disposed on the output shaft of the motor 2, and a worm wheel 31 is disposed on the fork shaft 3. The worm 21 and the worm wheel 31 are meshed with each other, and the motor 2 drives the fork shaft 3 to rotate through the worm gear mechanism.

[0034] like Figure 3 As shown, the shift fork 4 includes a fixing portion 41 and a fork body portion 42, and the fixing portion 41 and the fork body portion 42 are connected as one. Further, the fixing portion 41 is provided with a first circular through hole 43 and a second circular through hole 44, the first circular through hole 43 is used to install the shift fork shaft 3, the first circular through hole 43 is an open structure, the axis of the first circular through hole is perpendicular to the axis of the second circular through hole, and a locking screw 5 is installed in the second circular through hole 44, and the shift fork 4 is fixed to the shift fork shaft 3 by the locking screw 5.

[0035] Furthermore, the straight groove 45 is provided on the fork body portion 42 of the shift fork 4 , the straight groove 45 is provided in an open manner, and the width of the straight groove 45 matches the diameter of the ball 15 .

[0036] like Figure 4 As shown, the ball 15 is connected to the outer periphery of the control valve sleeve 13 through the connecting block 14, and the control valve sleeve 13 and the connecting block 14 are set as an integral structure. Further, the ball 15 is a steel ball fixed to the end surface of the connecting block 14 by welding.

[0037] The matching structure of the shift fork and the control valve is as follows: Figure 5 As shown, a control valve core 11 is installed in the control valve sleeve 13, and the control valve core 11 is meshed with the valve core driving tappet 12 through a tooth structure. Specifically, the valve core is provided with gear teeth, and the valve core driving tappet is provided with spur teeth, and the gear teeth and spur teeth are meshed with each other.

[0038] The working principle of the variable adjustment structure for the hydraulic variable valve control mechanism provided by the utility model is as follows:

[0039] The motor 2 rotates, and through the worm gear transmission structure, it drives the fork shaft 3 to rotate, and then drives the fork 4 to rotate. The fork 4 has a straight groove, and the control valve sleeve 13 is welded with a steel ball. The steel ball slides with the groove, and the control valve sleeve 13 is driven to rotate a certain angle under the movement of the fork 4. The fork 4 is fastened to the fork shaft 3 by the fork locking screw 5. The valve core drives the tappet 12 to reciprocate through the camshaft. The valve core drives the tappet 12 to drive the control valve core 11 to swing back and forth. The high-pressure oil is output through the relative movement between the control valve core 11 and the control valve sleeve 13, so as to achieve the purpose of controlling the valve opening adjustment.

[0040] In this embodiment, a plurality of variable valve control mechanism bodies are installed on the fork shaft, and the plurality of variable valve control mechanisms are spaced a certain distance apart on the fork shaft. Each variable valve control mechanism corresponds to one engine cylinder, and a motor is used to control multiple cylinder variable valve control mechanisms, which is different from the existing Figure 7 The variable valve control mechanism shown in the figure simplifies the structure compared with the single steel control motor 6, and at the same time, the motor is arranged outside the housing 7, so that the motor has a better heat dissipation function.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A variable adjustment structure for a hydraulic variable valve control mechanism, characterized in that: It includes a motor, a shift fork shaft, a shift fork, a control valve sleeve, a control valve core and a valve core driving tappet. The control valve sleeve is installed on the shift fork shaft through a shift fork. The shift fork is provided with a straight groove. The control valve sleeve is provided with a ball. The ball slides in the straight groove. The shift fork shaft is connected to the motor through a worm gear mechanism.

2. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 1, characterized in that: A worm is arranged on the output shaft of the motor, a worm wheel is arranged on the fork shaft, the worm and the worm wheel are meshed, and the motor drives the fork shaft to rotate.

3. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 1, characterized in that: The shift fork comprises a fixed portion and a fork body portion, and the fixed portion and the fork body portion are an integrally connected structure.

4. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 3, characterized in that: The fixing part is provided with a first circular through hole and a second circular through hole, wherein the first circular through hole is used for mounting the shift fork shaft, and a locking screw is mounted in the second circular through hole to fix the shift fork on the shift fork shaft.

5. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 3, characterized in that: The straight groove is arranged on the fork body part of the shift fork, the straight groove is arranged in an open manner, and the width of the straight groove matches the diameter of the sphere.

6. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 1, characterized in that: The sphere is connected to the outer periphery of the control valve sleeve via a connecting block, and the control valve sleeve and the connecting block are arranged as an integral structure.

7. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 6, characterized in that: The sphere is a steel ball fixed on the end surface of the connecting block by welding.

8. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 1, characterized in that: The control valve core is installed in the control valve sleeve, and the control valve core is meshed with the valve core driving tappet through a tooth structure.

9. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 8, characterized in that: The control valve core is provided with gear teeth, and the control valve core driving tappet is provided with spur teeth, and the gear teeth and spur teeth are meshed with each other.

10. The variable adjustment structure for a hydraulic variable valve control mechanism according to claim 1, characterized in that: A plurality of variable valve control mechanism bodies are installed on the shift fork shaft, and each variable valve control mechanism body corresponds to one engine cylinder.

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