Starting motor of low-temperature-resistant engine
By introducing a transmission mechanism, a sealing mechanism, and a lubrication component into the starter motor, the problem of lubricating oil and sealing component failure at low temperatures is solved, achieving effective lubrication and sealing under low-temperature conditions, extending the service life of the starter motor, and reducing lubricating oil consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HAIWEI ELECTRICAL APPLIANCES CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-08
AI Technical Summary
Existing starter motors are prone to lubrication and sealing component failure under low temperature conditions, leading to damage and failing to effectively prevent wear at high engine speeds.
A starter motor for a low-temperature engine was designed, comprising a transmission mechanism, a sealing mechanism, a lubrication assembly, and a valve device. The shaft connection and disconnection are controlled by a temperature control switch to prevent the lubricating oil from solidifying. The lubrication assembly controls the discharge of lubricating oil through the valve device to prevent lubricating oil leakage and waste.
It effectively prevents lubricating oil from solidifying and leaking under low-temperature conditions, extends the service life of the starter motor, reduces lubricating oil consumption, and improves the engine's low-temperature resistance.
Smart Images
Figure CN224218219U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of starter motor technology, specifically to a starter motor for a low-temperature resistant engine. Background Technology
[0002] As we all know, starting an engine requires external force, and the starter motor plays this role. Generally speaking, the starter motor uses three components to achieve the entire starting process. A DC electric motor introduces current from the battery and causes mechanical movement in the starter motor's drive gears. The starter motor is used to start the engine. After the engine starts, to prevent the high engine speed from damaging the starter motor, the starter motor is disconnected from the engine and stops. However, at low temperatures, the lubricating oil and seals inside the starter motor are prone to failure, leading to damage. Therefore, a starter motor suitable for low-temperature engines is needed. Utility Model Content
[0003] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.
[0004] To address the technical problems mentioned in the background section above, some embodiments of this application provide a starter motor for a cryogenic engine, including a housing, an end cover, a connecting mechanism disposed on the housing and the end cover, a shaft passing through the end cover, a rotor fixedly disposed on the shaft, a sealing mechanism disposed on the end cover, a stator fixedly disposed on the housing, and a transmission mechanism disposed on the shaft and the end cover; the transmission mechanism includes a first sliding groove fixedly disposed on the end cover, a pressure plate slidably disposed on the first sliding groove, multiple first mounting grooves fixedly disposed on the pressure plate, a shielding shell fixedly disposed on the first mounting groove, a coil fixedly disposed on the shielding shell, a connecting plate slidably disposed on the first mounting groove, a rotating groove fixedly disposed on the connecting plate, multiple connecting grooves fixedly disposed on the shaft, a rotating plate rotatably disposed on the rotating groove and slidable along the connecting groove, and a return spring fixed at one end on the connecting plate and at the other end on the pressure plate.
[0005] Specifically, the sealing mechanism includes a first oil seal assembly disposed on the end cap, a lubrication assembly slidably disposed on the first groove, and a second oil seal assembly disposed on the pressure plate.
[0006] Specifically, the connecting mechanism includes a first through hole symmetrically fixed on the housing, a first threaded hole symmetrically fixed on the end cap, and a first threaded rod symmetrically passing through the first through hole and engaging with the first threaded hole.
[0007] Specifically, the first oil seal assembly includes a first rubber ring disposed on the end cap, a first skeleton fixedly disposed on the first rubber ring, a first dustproof lip fixedly disposed on the first rubber ring, a first spring sleeved on the first rubber ring, and a first flexural block fixedly disposed on the first rubber ring.
[0008] Specifically, the second oil seal assembly includes a second rubber ring disposed on the pressure plate, a second skeleton fixedly disposed on the second rubber ring, a second dust lip fixedly disposed on the second rubber ring, a second spring sleeved on the second rubber ring, and a second flexural block fixedly disposed on the second rubber ring.
[0009] Specifically, the lubrication assembly includes a base slidably disposed on a first groove, an oil storage chamber fixedly disposed on the base, a plurality of valve devices fixedly disposed on the base, and a sealing plug disposed on the base.
[0010] Specifically, the valve device includes a second through hole fixed on the base, a second slide groove fixed on the base, a third slide groove fixed on the base, a valve stem slidably disposed on the second slide groove and the third slide groove, a cavity fixed on the base, a valve ball fixed on the valve stem, multiple third through holes fixed on the valve stem, a third spring fixed at one end on the base and at the other end on the valve stem, and multiple protrusions fixed on the shaft.
[0011] The beneficial effects of this utility model are:
[0012] (1) A transmission mechanism is provided. The connecting plate is inserted into the coil. The inserted part is an iron core. When the coil is energized, it can generate a magnetic field, drive the iron core to move, and then drive the connecting plate to move. It also drives the rotating plate to slide on the connecting groove, so that the two shafts are disconnected. When the coil is de-energized, the magnetic field disappears. The reset spring drives the connecting plate and the iron core to reset, and then the rotating plate is reset. The two shafts are reconnected through the rotating plate. The rotating plate is provided with multiple connecting blocks that can slide on the connecting groove. The two ends of the connecting blocks are provided with inclined surfaces to facilitate sliding into the connecting groove. The side of the end cover that is in contact with the outside is provided with a temperature control switch. When the temperature is low, the power supply of the coil can be turned on, so that the two shafts are disconnected. The engine drives the right shaft to continue to rotate, preventing the lubrication assembly, the first oil seal assembly and the second oil seal assembly from solidifying due to low temperature and static state, and the oil seal assembly from being damaged. When the engine stops, the power supply of the coil is turned off, so that the two shafts are reconnected for transmission.
[0013] (2) A lubrication component is provided to lubricate the shaft surface and prevent the contact surfaces of the first and second rubber rings with the shaft from drying out, which would lead to excessive wear of the first and second rubber rings due to lubrication failure and reduced sealing effect.
[0014] (3) A valve device is provided to control the discharge of lubricating oil. When the top of the valve stem is not in contact with the conical surface on the second through hole, the lubricating oil in the oil storage chamber can enter the second slide groove through the second through hole, and then enter the cavity through the third through hole. At this time, the valve ball is in contact with the lower end of the cavity, and the lubricating oil cannot flow out. When the shaft rotates and the protrusion contacts the valve ball, it will lift the valve ball, stretch the third spring, and at the same time, the valve stem moves upward. The top of the valve stem is in contact with the conical surface on the second through hole, preventing the lubricating oil in the oil storage chamber from flowing out. At this time, the lubricating oil in the cavity can flow out from the gap between the valve ball and the cavity. The lubricant enters the annular cavity formed by the base, shaft, first rubber ring, and second rubber ring, lubricating the contact surfaces of the valve ball and the protrusion, the first rubber ring and the shaft, and the second rubber ring and the shaft. As the protrusion continues to rotate with the shaft, it disengages from the valve ball. The third spring then moves the valve stem and valve ball downwards to reset. The top of the valve stem disengages from the conical surface of the second through hole, allowing lubricating oil to flow from the oil reservoir into the cavity. The valve ball contacts the lower inner wall of the cavity, preventing newly flowing lubricating oil from flowing out. This prevents a large amount of lubricating oil from leaking out instantly, thus saving lubricating oil. Attached Figure Description
[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.
[0016] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.
[0017] In the attached diagram:
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a top view of the present invention;
[0020] Figure 3 for Figure 2 A line section of AA;
[0021] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;
[0022] Figure 5 for Figure 3 A magnified view of a section at point C;
[0023] Figure 6 for Figure 3 A magnified view of a section at point D;
[0024] Figure 7 for Figure 3 A magnified view of a section at point E in the middle;
[0025] Figure 8 for Figure 3 A magnified view of a section at point F. Detailed Implementation
[0026] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0027] It should also be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.
[0028] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.
[0029] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".
[0030] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.
[0031] Reference Figures 1-8As shown, the starting motor for a low-temperature engine according to this utility model includes a housing 1, an end cover 2, a connecting mechanism 3 disposed on the housing and the end cover, a shaft 4 penetrating through the end cover, a rotor 5 fixedly disposed on the shaft 6, a sealing mechanism 6 disposed on the end cover, a stator 7 fixedly disposed on the housing, and a transmission mechanism 8 disposed on the shaft 6 and the end cover; the transmission mechanism includes a first sliding groove 81 fixedly disposed on the end cover, a pressure plate 82 slidably disposed on the first sliding groove, a plurality of first mounting grooves 83 fixedly disposed on the pressure plate, and a first mounting groove 84 fixedly disposed on the end cover. The components include a shielding shell 84 on the mounting slot, a coil 85 fixedly mounted on the shielding shell, a connecting plate 86 slidably mounted on the first mounting slot, a rotating slot 87 fixedly mounted on the connecting plate, multiple connecting slots 88 fixedly mounted on the shaft, a rotating plate 89 rotatably mounted on the rotating slot and slidable along the connecting slot, and a return spring 80 fixed at one end on the connecting plate and at the other end on the pressure plate; the housing, end cover, shaft, rotor, and stator are existing technologies, i.e., existing starter motors, with the shaft divided into two sections connected by a transmission mechanism; the connecting mechanism uses... The system connects the end cap and the housing; a pressure plate is inserted into the first sliding groove and fixed to the end cap with screws, and the pressure plate can limit the movement of the second oil seal assembly; the shielding shell can shield the electromagnetic field generated by the coil when it is energized; the connecting plate is inserted into the coil, and the inserted part is an iron core. When the coil is energized, it can generate a magnetic field, drive the iron core to move, and then drive the connecting plate to move, and drive the rotating plate to slide on the connecting groove, so that the two shafts are disconnected; when the coil is de-energized, the magnetic field disappears, the return spring drives the connecting plate and the iron core to reset, and then drives the rotating plate to reset, and the two shafts are reconnected through the rotating plate; the rotating plate is provided with multiple connecting blocks, which can slide on the connecting groove, and the two ends of the connecting blocks are provided with inclined surfaces to facilitate sliding into the connecting groove; the side of the end cap that contacts the outside is provided with a temperature control switch. When the temperature is low, the power supply of the coil can be turned on, so that the two shafts are disconnected, and the engine drives the right shaft to continue to rotate, preventing the lubrication assembly, the first oil seal assembly and the second oil seal assembly from solidifying due to low temperature and static state, and preventing damage to the oil seal assembly. When the temperature rises, the power supply of the coil is turned off, so that the two shafts are reconnected for transmission.
[0032] Specifically, the sealing mechanism includes a first oil seal assembly 61 disposed on the end cover, a lubrication assembly 63 slidably disposed on the first slide groove, and a second oil seal assembly 65 disposed on the pressure plate; the first oil seal assembly prevents external dust from entering and prevents lubricating oil from leaking out; the second oil seal assembly prevents lubricating oil from leaking into the rotor; the lubrication assembly is used to lubricate the surface of the shaft.
[0033] Specifically, the connecting mechanism includes a first through hole 31 symmetrically fixed on the housing, a first threaded hole 32 symmetrically fixed on the end cap, and a first threaded rod 33 symmetrically passing through the first through hole and engaging with the first threaded hole. When installing the end cap, the end cap is inserted into the housing, the first threaded hole is aligned with the first through hole, the first threaded rod is passed through the first through hole, and then the first threaded rod is rotated to fix the end cap on the threaded rod, so that the housing and the end cap are connected together.
[0034] Specifically, the first oil seal assembly includes a first rubber ring 611 disposed on the end cap, a first skeleton 612 fixedly disposed on the first rubber ring, a first dustproof lip 613 fixedly disposed on the first rubber ring, a first spring 614 sleeved on the first rubber ring, and a first flexible block 615 fixedly disposed on the first rubber ring. The first rubber ring has a certain elasticity, with one side of the ring wall contacting the vertical inner wall of the end cap and the other side of the ring wall contacting the circular inner wall of the end cap. The first skeleton is made of metal, which can provide a certain rigidity and prevent the first rubber ring from being completely deformed. The first dustproof lip can prevent external dust and impurities from passing through the first rubber ring and entering the interior of the lubrication assembly. The first spring can fasten the first rubber ring onto the shaft, and the first flexible block has a conical surface that fits against the outer wall of the shaft. The first spring presses the first flexible block onto the shaft through its elastic force, improving the sealing performance and preventing the lubricating oil inside the lubrication assembly from leaking out.
[0035] Specifically, the second oil seal assembly includes a second rubber ring 651 mounted on a pressure plate, a second skeleton 652 fixedly mounted on the second rubber ring, a second dust lip 653 fixedly mounted on the second rubber ring, a second spring 654 sleeved on the second rubber ring, and a second flexible block 655 fixedly mounted on the second rubber ring. The second rubber ring has a certain elasticity, with one side of its ring wall contacting the vertical inner wall of the pressure plate and the other side contacting the circular inner wall of the end cap. The second skeleton is made of metal, which provides a certain rigidity to prevent the second rubber ring from completely deforming. The second dust lip prevents metal debris generated during the operation of components such as the rotor and stator from passing through the second rubber ring and entering the lubrication assembly. The second spring can fasten the second rubber ring onto the shaft, and the second flexible block has a conical surface that fits against the outer wall of the shaft. The second spring, through its elastic force, presses the second flexible block onto the shaft, improving the sealing performance and preventing lubricating oil in the lubrication assembly from leaking onto the rotor and stator.
[0036] Specifically, the lubrication assembly includes a base 631 slidably disposed on a first slide groove, an oil storage cavity 632 fixedly disposed on the base, multiple valve devices 633 fixedly disposed on the base, and a sealing plug 634 disposed on the base. The base slides in an annular slide groove and is slidably disposed on the first slide groove, thus being limited by the first slide groove and unable to rotate. One side of the base contacts a first rubber ring, and the other side contacts a second rubber ring. At the same time, the base contacts a pressure plate and is limited by the pressure plate. The oil storage cavity is used to store lubricating oil. The valve devices are used to control the discharge of lubricating oil. The sealing plug is a prior art technology that can seal the filling hole on the base. Before installing the base in the first slide groove, the sealing plug is first removed, lubricating oil is added to the oil storage cavity, and then the sealing plug is put on, and the base is inserted into the first slide groove.
[0037] Specifically, the valve device includes a second through hole 6331 fixedly disposed on the base, a second slide groove 6332 fixedly disposed on the base, a third slide groove 6333 fixedly disposed on the base, a valve stem 6334 slidably disposed on the second slide groove and the third slide groove, a cavity 6335 fixedly disposed on the base, a valve ball 6336 fixedly disposed on the valve stem, a plurality of third through holes 6337 fixedly disposed on the valve stem, and a valve being fixed at one end to the base and at the other end to the valve stem. The valve stem has a third spring 6338 and multiple protrusions 6339 fixedly mounted on the shaft. A conical surface is provided on the second through hole, which communicates with the oil reservoir. The upper end of the valve stem is conical, the lower end is fixedly connected to the valve ball, and the middle part is disc-shaped, slidingly mounted on the second and third sliding grooves. The third sliding groove limits the valve stem's position, preventing rotation. The protrusions are arc-shaped, corresponding one-to-one with the valve ball, and multiple protrusions are staggered on the circumference, meaning that when the shaft rotates, multiple protrusions will not simultaneously engage the valve ball. The valve ball is raised to prevent a large amount of lubricating oil from leaking out instantly. When the shaft rotates and the protrusion contacts the valve ball, it lifts the valve ball, stretches the third spring, and moves the valve stem upward. The top of the valve stem fits against the conical surface on the second through hole, preventing the lubricating oil in the oil reservoir from flowing out. At this time, the lubricating oil in the cavity can flow out from the gap between the valve ball and the cavity and enter the annular cavity formed by the base, shaft, first rubber ring, and second rubber ring, lubricating the contact surfaces between the valve ball and the protrusion, the first rubber ring and the shaft, and the second rubber ring and the shaft. When the protrusion continues to rotate with the shaft, the protrusion loses contact with the valve ball, and the third spring drives the valve stem and valve ball to move downward and reset. The top of the valve stem separates from the conical surface of the second through hole, and the lubricating oil can flow out from the oil reservoir into the cavity. The valve ball contacts the lower inner wall of the cavity, preventing the newly flowing lubricating oil from flowing out, thus preventing a large amount of lubricating oil from leaking out instantly and saving lubricating oil.
[0038] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in the embodiments of this disclosure is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.
Claims
1. A starter motor for a low-temperature resistant engine, characterized in that: The device includes a housing (1), an end cap (2), a connecting mechanism (3) provided on the housing and the end cap, a shaft (4) passing through the end cap, a rotor (5) fixed on the shaft, a sealing mechanism (6) provided on the end cap, a stator (7) fixed on the housing, and a transmission mechanism (8) provided on the shaft and the end cap. The transmission mechanism includes a first sliding groove (81) fixed on the end cap, a pressure plate (82) slidably provided on the first sliding groove, multiple first mounting grooves (83) fixed on the pressure plate, a shielding shell (84) fixed on the first mounting groove, a coil (85) fixed on the shielding shell, a connecting plate (86) slidably provided on the first mounting groove, a rotating groove (87) fixed on the connecting plate, multiple connecting grooves (88) fixed on the shaft, a rotating plate (89) rotatably provided on the rotating groove and slidable along the connecting groove, and a return spring (80) fixed at one end on the connecting plate and at the other end on the pressure plate.
2. The starter motor for a low-temperature resistant engine according to claim 1, characterized in that: The sealing mechanism includes a first oil seal assembly (61) disposed on the end cap, a lubrication assembly (63) slidably disposed on the first groove, and a second oil seal assembly (65) disposed on the pressure plate.
3. The starter motor for a low-temperature resistant engine according to claim 1, characterized in that: The connecting mechanism includes a first through hole (31) symmetrically fixed on the housing, a first threaded hole (32) symmetrically fixed on the end cap, and a first threaded rod (33) symmetrically passing through the first through hole and engaging with the first threaded hole.
4. The starter motor for a low-temperature resistant engine according to claim 2, characterized in that: The first oil seal assembly includes a first rubber ring (611) disposed on the end cap, a first skeleton (612) fixedly disposed on the first rubber ring, a first dust lip (613) fixedly disposed on the first rubber ring, a first spring (614) sleeved on the first rubber ring, and a first flexure block (615) fixedly disposed on the first rubber ring.
5. A starter motor for a low-temperature resistant engine according to claim 2, characterized in that: The second oil seal assembly includes a second rubber ring (651) disposed on the pressure plate, a second skeleton (652) fixedly disposed on the second rubber ring, a second dust lip (653) fixedly disposed on the second rubber ring, a second spring (654) sleeved on the second rubber ring, and a second flexural block (655) fixedly disposed on the second rubber ring.
6. The starting motor for a low-temperature resistant engine according to claim 2, characterized in that: The lubrication assembly includes a base (631) slidably disposed on a first groove, an oil storage chamber (632) fixedly disposed on the base, a plurality of valve devices (633) fixedly disposed on the base, and a sealing plug (634) disposed on the base.
7. A starter motor for a low-temperature resistant engine according to claim 6, characterized in that: The valve device includes a second through hole (6331) fixed on the base, a second slide groove (6332) fixed on the base, a third slide groove (6333) fixed on the base, a valve stem (6334) slidably disposed on the second slide groove and the third slide groove, a cavity (6335) fixed on the base, a valve ball (6336) fixed on the valve stem, multiple third through holes (6337) fixed on the valve stem, a third spring (6338) fixed at one end on the base and at the other end on the valve stem, and multiple protrusions (6339) fixed on the shaft.