Oil way system and speed control system

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By adopting a one-way pump and a one-way valve design in the cycloid pump, the oil suction and oil discharge positions are fixed when the oil pump rotates, the problems of eccentric ring wear and shear force of the limit pin are solved, and the use of the gearbox is improved Lifespan and stability.

CN222350936UActive Publication Date: 2025-01-14JOINTECH (SUZHOU) VEHICLE SYST CO LTD

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Patent Information

Application Number: CN202420885668.8
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-26
Publication Date: 2025-01-14
Estimated Expiration: 2034-04-26

AI Technical Summary

Technical Problem

The existing cycloid pumps in the gearbox have changed the oil suction and oil pressure ports due to changes in the steering of the inner rotor, resulting in wear of the eccentric ring and high shear force of the limit pin, which may cause the pump to fail, and lack protection measures, which affects the service life. .

Method used

The design of one-way pump and one-way valve is adopted. By changing the oil suction and oil discharge positions when the oil pump rotates clockwise and counterclockwise, ensuring that the position of the oil suction and oil discharge port is fixed and replaced by the eccentric ring to achieve the control of the inlet and outlet direction of the oil pump.

Benefits of technology

Improves the service life of the oil pump and transmission, avoids excessive wear and breakage of the eccentric ring and limit pin, and enhances stability in extreme cases.

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Abstract

The oil way system comprises an oil pump, when the oil pump rotates clockwise, the oil suction position of the oil pump is connected with an oil tank through a first oil suction way, and the oil discharge position of the oil pump is connected with a load through a first oil discharge way; when the oil pump rotates anticlockwise, the oil suction position of the oil pump is connected with the oil tank through a second oil suction path, and the oil discharge position of the oil pump is connected with the load through a second oil discharge path; the oil suction position when the oil pump rotates clockwise is the oil discharge position when the oil pump rotates anticlockwise; the oil discharge position when the oil pump rotates clockwise is the oil suction position when the oil pump rotates anticlockwise; even if the oil suction position and the oil discharge position of the oil pump are exchanged in the clockwise rotation process and the anticlockwise rotation process of the oil pump, the positions of the oil suction port and the oil discharge port of the oil pump are still kept unchanged, oil suction is still achieved from the oil tank through the oil suction port, and oil is discharged to a load through the oil discharge port so as to achieve the cooling and lubricating effects of the oil pump.

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Description

Technical Field

[0001] The utility model belongs to the technical field of lubrication and cooling of a speed change system, and in particular relates to an oil circuit system and a speed change system. Background Art

[0002] A cycloid pump is a gear pump that uses the change in seal volume between teeth to achieve oil suction and oil pressure. It is widely used in low-pressure applications. However, most existing cycloid pumps rotate in one direction. If they run in the opposite direction, the oil suction and oil pressure ports need to be swapped. For the lubrication and cooling of the gearbox, the cycloid pump generally drives the inner rotor through a motor to achieve lubrication and cooling of the components that need lubrication in the specified flow direction. However, the gearbox has forward and reverse gears, which means that the direction of the inner rotor will change during operation, and the change in the direction of the inner rotor will cause the oil suction and oil pressure ports to change, but the actual need for the oil suction and oil pressure ports to not change. Therefore, current applications usually involve installing an eccentric ring (clearance fit) on the outer rotor, and then limiting the eccentric ring by rotating it 180° through the rotation of the outer rotor (limiting pin and limiting groove) to achieve eccentricity change, so that the change in the rotation direction of the inner rotor does not affect the change in the suction and oil pressure ports.

[0003] Since the outer circle of the outer rotor and the inner hole of the eccentric ring are clearance fit, in order to ensure eccentric reversing (the outer rotor drives the eccentric ring to rotate 180°), the commonly used method is to achieve eccentric reversing by increasing the friction between the outer circle of the outer rotor and the inner hole of the eccentric ring, such as the combination of springs, springs and pins. While ensuring reversing, this method brings the following negative effects:

[0004] 1) Accelerates the wear of the eccentric ring and the rotor, resulting in reduced oil cleanliness and reduced pump performance;

[0005] 2) Due to the existence of friction, the eccentric ring has a large acceleration when changing direction, which causes a large impact between the limit pin on the eccentric ring and the limit groove on the pump body. Long-term operation can easily cause the pump to fail;

[0006] 3) Since the motor directly drives the oil pump after the first stage of reduction, the driving torque cannot be controlled and there is no active protection measure for the oil pump. As a result, in some extreme cases, the eccentric ring is subjected to a large circumferential force, and the limit pin is also subjected to a large shear force, which may cause the limit pin to break, resulting in pump failure and ultimately gearbox failure.

[0007] Therefore, there is an urgent need to provide an oil circuit system and a speed change system to solve the defects and shortcomings in the above-mentioned prior art. Utility Model Content

[0008] In order to solve the defects and shortcomings in the prior art, the utility model provides an oil circuit system and a speed change system.

[0009] The technical solution provided by the utility model is as follows:

[0010] An oil circuit system, comprising an oil pump, characterized in that:

[0011] When the oil pump rotates clockwise, the oil suction position of the oil pump is connected to the oil tank via the first oil suction oil passage, and the oil discharge position of the oil pump is connected to the load via the first oil discharge oil passage;

[0012] When the oil pump rotates counterclockwise, the oil suction position of the oil pump is connected to the oil tank via the second oil suction oil passage, and the oil discharge position of the oil pump is connected to the load via the second oil discharge oil passage;

[0013] And the oil suction position when the oil pump rotates clockwise is the oil discharge position when the oil pump rotates counterclockwise; the oil discharge position when the oil pump rotates clockwise is the oil suction position when the oil pump rotates counterclockwise.

[0014] As a further preferred embodiment of the present utility model, the oil pump is a one-way pump, which can rotate both clockwise and counterclockwise.

[0015] As a further preferred embodiment of the utility model, a first oil suction check valve is provided in the first oil suction circuit, and a second oil suction check valve is provided in the second oil suction circuit;

[0016] A first oil discharge one-way valve is arranged in the first oil discharge oil circuit, and a second oil discharge one-way valve is arranged in the second oil discharge oil circuit.

[0017] As a further preferred embodiment of the present utility model, the first oil suction one-way valve, the second oil suction one-way valve, the first oil discharge one-way valve and the second oil discharge one-way valve are all opened and closed by the pressure difference on both sides.

[0018] As a further preferred embodiment of the present invention,

[0019] When oil is sucked from the oil tank, the first oil suction check valve and the second oil suction check valve are opened; when oil is discharged to the oil tank, the first oil suction check valve and the second oil suction check valve are closed;

[0020] When discharging oil to a load, the first oil discharge check valve and the second oil discharge check valve are opened; when sucking oil from a load, the first oil discharge check valve and the second oil discharge check valve are closed.

[0021] As a further preferred embodiment of the present invention,

[0022] One end of the first oil suction oil circuit is connected to the oil tank, and the other end is connected to the oil suction position when the oil pump rotates clockwise;

[0023] One end of the second oil suction oil circuit is connected to the oil tank, and the other end is connected to the oil discharge position when the oil pump rotates clockwise;

[0024] One end of the first oil discharge passage is connected to the load, and the other end is connected to the oil discharge position when the oil pump rotates clockwise;

[0025] One end of the second oil row oil circuit is connected to the load, and the other end is connected to the oil suction position when the oil pump rotates clockwise.

[0026] As a further preferred embodiment of the utility model, when the oil pump rotates clockwise, the first oil suction check valve and the first oil discharge check valve are opened, and the second oil suction check valve and the second oil discharge check valve are closed. At this time, the oil circuit is: oil tank → first oil suction check valve → oil pump → first oil discharge check valve → load.

[0027] As a further preferred embodiment of the utility model, when the oil pump rotates counterclockwise, the first oil suction check valve and the first oil discharge check valve are closed, and the second oil suction check valve and the second oil discharge check valve are opened. At this time, the oil circuit is: oil tank → second oil suction check valve → oil pump → second oil discharge check valve → load.

[0028] As a further preferred embodiment of the present utility model, the circumferential angle between the oil suction position and the oil discharge position of the oil pump is 180°.

[0029] Furthermore, the utility model also provides a speed change system, characterized in that the speed change system adopts the oil circuit system mentioned above.

[0030] Compared with the prior art, the beneficial effects achieved by the utility model include:

[0031] 1) The utility model provides an oil circuit system and a speed change system, which replaces the eccentric ring used in the prior art through a new oil pump inlet and outlet direction control system, thereby solving the problems that occur when the eccentric ring is used in the oil pump, especially improving the problem that due to the lack of protection measures for the oil pump, the eccentric ring is subjected to a large circumferential force in some extreme cases, so the shear force on the limit pin is also large, which may cause the limit pin to break, thereby improving the service life of the pump and even the entire gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the oil pump of the utility model when it rotates clockwise.

[0033] Figure 2 It is a structural schematic diagram of the utility model when the oil pump rotates counterclockwise. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] [First embodiment]

[0038] like Figure 1-2 The figure shows an oil circuit system provided by the first embodiment of the utility model, including an oil pump P, which is used to suck cooling oil from the oil tank and pump it to the load position to achieve cooling and lubrication effects on the load. Figure 1-2 As shown, the oil pump P in this embodiment uses a one-way pump, which can rotate both clockwise and counterclockwise, and the oil suction position and the oil discharge position are swapped when rotating clockwise and counterclockwise, that is, the oil suction position when the oil pump P rotates clockwise is the oil discharge position when the oil pump P rotates counterclockwise; the oil discharge position when the oil pump P rotates clockwise is the oil suction position when the oil pump P rotates counterclockwise. Preferably, the circumferential angle between the oil suction position and the oil discharge position of the oil pump P is 180°, so that the positions of the oil suction port and the oil discharge port of the one-way pump are fixed by controlling the oil suction position and the oil discharge position of the one-way pump (regardless of whether the one-way pump rotates clockwise or counterclockwise).

[0039] The specific manifestations are:

[0040] When the oil pump P rotates clockwise, the oil suction position of the oil pump P is connected to the oil tank via the first oil suction oil circuit, and the oil discharge position of the oil pump P is connected to the load via the first oil discharge oil circuit; one end of the first oil suction oil circuit is connected to the oil tank, and the other end is connected to the oil suction position of the oil pump P when it rotates clockwise, one end of the first oil discharge oil circuit is connected to the load, and the other end is connected to the oil discharge position of the oil pump P when it rotates clockwise;

[0041] When the oil pump P rotates counterclockwise, the suction position of the oil pump P is connected to the oil tank via the second oil suction oil circuit, and the oil discharge position of the oil pump P is connected to the load via the second oil discharge oil circuit; one end of the second oil suction oil circuit is connected to the oil tank, and the other end is connected to the oil discharge position when the oil pump P rotates clockwise, one end of the second oil discharge oil circuit is connected to the load, and the other end is connected to the suction position of the oil pump P when it rotates clockwise.

[0042] Thus, a new oil pump inlet and outlet direction control system is used to replace the eccentric ring used in the prior art, thereby solving the problems that arise when the eccentric ring is used in the oil pump, especially improving the situation that due to the lack of protection measures for the oil pump, the eccentric ring is subjected to a large circumferential force in some extreme cases, and the shear force on the limit pin is also large, which may cause the limit pin to break, thereby improving the service life of the pump and even the entire gearbox.

[0043] like Figure 1-2 As shown, in this embodiment,

[0044] The first oil suction circuit is provided with a first oil suction check valve F1, and the second oil suction circuit is provided with a second oil suction check valve F2; the first oil discharge circuit is provided with a first oil discharge check valve F3, and the second oil discharge circuit is provided with a second oil discharge check valve F4. In this embodiment, the first oil suction check valve F1, the second oil suction check valve F2, the first oil discharge check valve F3, and the second oil discharge check valve F4 are all opened and closed by the pressure difference on both sides.

[0045] The specific working method is:

[0046] When oil is sucked from the oil tank, the first oil suction check valve F1 and the second oil suction check valve F2 are opened; when oil is discharged to the oil tank, the first oil suction check valve F1 and the second oil suction check valve F2 are closed;

[0047] When discharging oil to the load, the first oil discharge check valve F3 and the second oil discharge check valve F4 are opened; when sucking oil from the load, the first oil discharge check valve F3 and the second oil discharge check valve F4 are closed.

[0048] This setting makes:

[0049] When the oil pump P rotates clockwise, the first oil suction check valve F1 and the first oil discharge check valve F3 are opened, and the second oil suction check valve F2 and the second oil discharge check valve F4 are closed. At this time, the oil circuit is: oil tank → first oil suction check valve → oil pump → first oil discharge check valve → load;

[0050] When the oil pump P rotates counterclockwise, the first oil suction check valve F1 and the first oil discharge check valve F3 are closed, and the second oil suction check valve F2 and the second oil discharge check valve F4 are opened. At this time, the oil circuit is: oil tank → second oil suction check valve → oil pump → second oil discharge check valve → load;

[0051] The above arrangement ensures that, even when the oil pump P rotates clockwise and counterclockwise and its oil suction position and oil discharge position are reversed, the positions of its oil suction port and oil discharge port remain fixed, and oil is still sucked from the oil tank through the oil suction port, while oil is discharged to the load through the oil discharge port to achieve its cooling and lubrication effects.

[0052] [Second embodiment]

[0053] The second embodiment of the utility model also provides a speed change system, which adopts the oil circuit system mentioned in the first embodiment. Of course, those skilled in the art should know that this solution is not limited to the application of the speed change system and the gearbox end, but can also be applied to the oil replenishment or lubrication occasions with low pressure and pump direction changes.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An oil system, comprising an oil pump (P), characterized in that: When the oil pump (P) rotates clockwise, the oil suction position of the oil pump (P) is connected to the oil tank via the first oil suction oil passage, and the oil discharge position of the oil pump (P) is connected to the load via the first oil discharge oil passage; When the oil pump (P) rotates counterclockwise, the oil suction position of the oil pump (P) is connected to the oil tank via the second oil suction oil passage, and the oil discharge position of the oil pump (P) is connected to the load via the second oil discharge oil passage; The oil suction position when the oil pump (P) rotates clockwise is the oil discharge position when the oil pump (P) rotates counterclockwise; the oil discharge position when the oil pump (P) rotates clockwise is the oil suction position when the oil pump (P) rotates counterclockwise.

2. The oil circuit system according to claim 1, characterized in that: The oil pump (P) is a one-way pump which can rotate both clockwise and counterclockwise.

3. The oil circuit system according to claim 1, characterized in that: A first oil suction check valve (F1) is provided in the first oil suction oil circuit, and a second oil suction check valve (F2) is provided in the second oil suction oil circuit; A first oil discharge check valve (F3) is provided in the first oil discharge oil circuit, and a second oil discharge check valve (F4) is provided in the second oil discharge oil circuit.

4. The oil circuit system according to claim 3, characterized in that: The first oil suction check valve (F1), the second oil suction check valve (F2), the first oil discharge check valve (F3) and the second oil discharge check valve (F4) are all opened and closed by the pressure difference on both sides.

5. The oil circuit system according to claim 4, characterized in that: When oil is sucked from the oil tank, the first oil suction check valve (F1) and the second oil suction check valve (F2) are opened; when oil is discharged to the oil tank, the first oil suction check valve (F1) and the second oil suction check valve (F2) are closed; When discharging oil to the load, the first oil discharge check valve (F3) and the second oil discharge check valve (F4) are opened; when sucking oil from the load, the first oil discharge check valve (F3) and the second oil discharge check valve (F4) are closed.

6. The oil circuit system according to claim 1, characterized in that: One end of the first oil suction oil passage is connected to the oil tank, and the other end is connected to the oil suction position when the oil pump (P) rotates clockwise; One end of the second oil suction oil circuit is connected to the oil tank, and the other end is connected to the oil discharge position when the oil pump (P) rotates clockwise; One end of the first oil discharge passage is connected to the load, and the other end is connected to the oil discharge position when the oil pump (P) rotates clockwise; One end of the second oil discharge oil passage is connected to the load, and the other end is connected to the oil suction position when the oil pump (P) rotates clockwise.

7. The oil circuit system according to claim 6, characterized in that: When the oil pump (P) rotates clockwise, the first oil suction check valve (F1) and the first oil discharge check valve (F3) are opened, and the second oil suction check valve (F2) and the second oil discharge check valve (F4) are closed. At this time, the oil circuit is: oil tank → first oil suction check valve → oil pump → first oil discharge check valve → load.

8. The oil circuit system according to claim 7, characterized in that: When the oil pump (P) rotates counterclockwise, the first oil suction check valve (F1) and the first oil discharge check valve (F3) are closed, and the second oil suction check valve (F2) and the second oil discharge check valve (F4) are opened. At this time, the oil circuit is: oil tank → second oil suction check valve → oil pump → second oil discharge check valve → load.

9. The oil circuit system according to claim 1, characterized in that: The circumferential angle between the oil suction position and the oil discharge position of the oil pump (P) is 180°.

10. A speed change system, characterized in that: The speed change system adopts the oil circuit system as described in any one of claims 1-9.