Retarder starter check ring press fitting device

Abstract

The application belongs to the technical field of reduction starter, and particularly relates to a reduction starter retainer ring press-fitting device, which comprises a supporting assembly, a switching assembly and a press-fitting assembly. The supporting assembly comprises a supporting seat and a supporting shaft. The supporting shaft has a rigid supporting state and a flexible supporting state. The switching assembly is used for switching the supporting shaft from the rigid supporting state to the flexible supporting state. The press-fitting assembly is used for pressing the steel wire retainer ring into the outer ring groove from top to bottom, and is used for pressing the outer retainer ring from bottom to top to be clamped with the steel wire retainer ring when the supporting shaft is switched to the flexible supporting state. When the supporting shaft is in the rigid supporting state, the installation of the steel wire retainer ring is realized by one-time pressing of the press-fitting assembly. When the supporting shaft is switched to the flexible supporting state by the switching assembly, the installation of the outer retainer ring is realized by two-time pressing of the press-fitting assembly, which replaces the previous manual operation, improves the installation precision and reduces the part scrap rate.

Description

Technical Field

[0001] This invention belongs to the field of deceleration starter technology, specifically relating to a deceleration starter retaining ring press-fitting device. Background Technology

[0002] The working principle of a reduction starter is that it is driven by an electric motor, and after torque amplification by a reduction mechanism, the power is transmitted to the engine flywheel through the output shaft of a one-way derailleur. In this power transmission path, the gear, as a key transmission component, is usually mounted on the output shaft of the one-way derailleur. To ensure reliable power transmission and prevent the gear from slipping axially during operation, an axial limiting mechanism must be installed on the output shaft.

[0003] Currently, the most common axial limiting solution is a combined retaining ring structure. Specifically, this structure typically includes a built-in wire retaining ring and an outer retaining ring that covers the outside of the wire retaining ring. The two work together to prevent the gear from flying out during operation, ensuring the overall operational safety of the starter motor.

[0004] However, in existing assembly processes, the installation of the aforementioned retaining rings primarily relies on manual hammering by operators. This traditional method has several inherent drawbacks:

[0005] 1. Poor assembly precision and consistency: The force, angle and point of impact of manual hammering are difficult to control precisely, which can easily lead to the retaining ring, especially the wire retaining ring, not being fully and evenly embedded in the outer ring groove of the output shaft, resulting in "improper installation". Such defective assembly poses a safety hazard to the long-term reliable operation of the starter.

[0006] 2. High component scrap rate: During the hammering installation process, the tool and the retaining ring are prone to hard impacts, causing plastic deformation, surface damage, or even breakage of the retaining ring, especially the relatively delicate steel wire retaining ring. Once the installation fails or the retaining ring is damaged, disassembly is extremely difficult due to its structural characteristics and tight fit after installation. Often, the disassembly process will cause further damage to the retaining ring or the output shaft groove, ultimately requiring the entire set of retaining rings to be scrapped, increasing production costs.

[0007] 3. Low assembly efficiency: The entire installation process heavily relies on the skill and experience of the workers, is cumbersome, and time-consuming. Furthermore, the disassembly, replacement, and reinstallation of defective units are even more time-consuming and labor-intensive, severely slowing down the overall production and assembly pace of the starter motor and becoming a bottleneck for improving production efficiency. Summary of the Invention

[0008] The technical problem to be solved by the present invention is: in order to solve the problem that the installation of the retaining ring in the prior art mainly relies on the manual hammering operation of the operator, resulting in poor assembly accuracy and consistency, high scrap rate of parts and low assembly efficiency, a deceleration starter retaining ring pressing device is provided.

[0009] The technical solution adopted by this invention to solve its technical problem is: a pressure fitting device for a deceleration starter retaining ring, used to press the retaining ring into the outer annular groove of the one-way valve output shaft to restrict the slippage of the gear sleeved on the output shaft. The retaining ring includes a steel wire retaining ring embedded in the outer annular groove and an outer retaining ring covering the outside of the steel wire retaining ring. The pressure fitting device includes:

[0010] The support assembly includes a support base for supporting the one-way valve housing and a support shaft mounted on the support base for supporting the one-way valve output shaft. The support shaft has a rigid support state and a flexible support state.

[0011] A switching component is used to switch the support shaft from a rigid support state to a flexible support state, so that the output shaft and the housing can move relative to each other.

[0012] The assembly includes a pressing component for pressing the wire retaining ring into the outer ring groove from top to bottom when the support shaft is in a rigid support state, and for pressing down again and pushing the output shaft downward when the support shaft switches to a flexible support state. The downward movement path of the gear sleeved on the output shaft is blocked by the housing and moves upward relative to the output shaft, pressing the outer retaining ring from bottom to top until it engages with the wire retaining ring.

[0013] Furthermore, the switching component includes a first linear reciprocating drive mechanism and a support plate connected to the output end of the first linear reciprocating drive mechanism. When the support plate is supported between the support shaft and the support seat, the support shaft is in a rigid support state. When the support plate is separated from the support shaft, the support shaft is in a flexible support state.

[0014] Furthermore, an elastic element is provided between the support shaft and the support base. When the support plate is separated from the support shaft, the elastic element supports the support shaft and the support base to form a flexible support state.

[0015] Furthermore, the pressing device also includes a lifting assembly for driving the support assembly to rise and fall, and a limiting assembly for pressing the gear to expose the outer ring groove on the output shaft when the support assembly drives the one-way device to move upward.

[0016] Furthermore, the limiting component includes a second linear reciprocating drive mechanism and a pressure plate connected to the output end of the second linear reciprocating drive mechanism.

[0017] Furthermore, the support base has a shaft cavity for inserting the support shaft and a support cavity communicating with the shaft cavity for the support plate to enter. The cavity wall of the shaft cavity and the bottom surface of the support shaft form an installation cavity for installing the elastic element.

[0018] Furthermore, the support plate has two spaced-apart support arms to form an opening slot between them for accommodating an elastic element, and the support plate has a limiting portion that abuts against the outer peripheral wall of the support seat to limit its range of movement.

[0019] Furthermore, the support base includes an upper base and a lower base that are fixedly connected, and the two together form the aforementioned support cavity.

[0020] Furthermore, it also includes a guide cone fixed to the top of the output shaft for the steel wire retaining ring to be fitted.

[0021] Furthermore, the pressing device also includes a base, on which a guide rod is fixed, and the support seat has a guide hole through which the guide rod passes.

[0022] The beneficial effects of the present invention are as follows: When the support shaft is in a rigid support state, the present invention uses the pressing component to press down once to install the wire retaining ring, and when the switching component switches the support shaft to a flexible support state, the pressing component uses the pressing component to press down a second time to install the outer retaining ring, which replaces the previous manual operation, improves the installation accuracy and reduces the scrap rate of parts.

[0023] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0026] Figure 2 This is a cross-sectional view of the present invention;

[0027] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0028] Figure 4 yes Figure 2 A magnified view of part B in the middle section;

[0029] Figure 5 This is a three-dimensional schematic diagram of the retaining ring of the present invention after assembly;

[0030] Figure 6 This is a cross-sectional view of the retaining ring of the present invention after assembly;

[0031] Figure 7 This is an assembly diagram of the switching component and the support component in this invention;

[0032] Figure 8 This is an exploded view of the support component in this invention;

[0033] Figure 9 This is a split view of the housing and the output shaft;

[0034] Figure 10 This is a schematic diagram showing that the retaining ring has not yet been pressed into the outer ring groove;

[0035] In the picture:

[0036] 1. Support assembly; 101. Support base; 1011. Shaft cavity; 1012. Support cavity; 1013. Upper seat; 1014. Lower seat; 102. Support shaft; 103. Elastic element;

[0037] 2. Switching components; 201. First linear reciprocating drive mechanism; 202. Support plate; 2021. Support arm; 2022. Limiting part;

[0038] 3. Press-fitting assembly; 301. Press head;

[0039] 4. Limiting component; 401. Second linear reciprocating drive mechanism; 402. Pressure plate;

[0040] 5. Lifting components;

[0041] 6. Guide cone;

[0042] 7. Base;

[0043] 8. Guide rod;

[0044] 9. One-way valve; 901. Output shaft; 9011. Outer ring groove; 902. Gear; 903. Housing; 9031. Limiting ring; 904. Spring;

[0045] 10. Steel wire retaining ring;

[0046] 11. Outer retaining ring. Detailed Implementation

[0047] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0048] like Figures 1-10As shown, a retaining ring pressing device for a deceleration starter is used to press the retaining ring into the outer annular groove 9011 of the output shaft 901 of a one-way valve 9 to prevent the gear 902 sleeved on the output shaft 901 from slipping. The output shaft 901 and the gear 902 are keyed together. The retaining ring includes a wire retaining ring 10 embedded in the outer annular groove 9011 and an outer retaining ring 11 covering the outside of the wire retaining ring 10. The wire retaining ring 10 is an open retaining ring. The wire retaining ring 10 and the outer retaining ring 11 are installed in steps. The pressing device includes:

[0049] Support assembly 1 includes a support base 101 for supporting the housing 903 of the one-way actuator 9 and a support shaft 102 mounted on the support base 101 for supporting the output shaft 901 of the one-way actuator 9. The support shaft 102 has a rigid support state and a flexible support state. When the support shaft 102 is in the rigid support state, the support base 101 and the support shaft 102 are rigidly connected and move synchronously. When the support shaft 102 is in the flexible support state, the support base 101 and the support shaft 102 are flexibly connected and can move relative to each other. The bottom of the housing 903 has a positioning step that mates with the support base 101, and the bottom of the output shaft 901 has a positioning groove for the support shaft 102 to be inserted.

[0050] Switching component 2 is used to switch the support shaft 102 from a rigid support state to a flexible support state. At this time, the output shaft 901 can float up and down, and the output shaft 901 and the housing 903 move relative to each other.

[0051] The press-fit assembly 3 is used to press the wire retaining ring 10 into the outer ring groove 9011 from top to bottom when the support shaft 102 is in a rigid support state, and to press down again and push the output shaft 901 to move down when the support shaft 102 switches to a flexible support state. The gear 902 sleeved on the output shaft 901 moves up relative to the output shaft 901 after its downward path is blocked by the housing 903, and presses the outer retaining ring 11 from bottom to top to engage with the wire retaining ring 10. A limiting ring 9031 for abutting against the gear 902 is formed on the inner peripheral wall of the housing 903.

[0052] During press fitting, first place the one-way valve 9 onto the support assembly 1. The support base 101 supports the bottom of the housing 903, and the support shaft 102 supports the bottom of the output shaft 901 and provides rigid support. Then, sequentially, the spring 904, gear 902, outer retaining ring 11, and wire retaining ring 10 are fitted onto the output shaft 901. Because the inner diameter of the outer retaining ring 11 is larger, it slides down to below the outer ring groove 9011 under gravity. The inner diameter of the wire retaining ring 10 is smaller, so it is stuck at the end of the output shaft 901 and will not move down. Then, the press head 301 of the press fitting assembly 3 moves down to press the wire retaining ring 10 into the outer ring groove 9011 and then resets. Then, the start... The switching component 2 switches the support shaft 102 from a rigid support state to a flexible support state. The pressure head 301 presses down again and drives the output shaft 901 to move down. The gear 902 on the output shaft 901 moves down synchronously. When the gear 902 abuts against the limiting ring 9031 on the housing 903, its downward movement path is blocked. The gear 902 moves up relative to the output shaft 901 to push the outer retaining ring 11 up, thereby allowing the wire retaining ring 10 to enter the outer retaining ring 11. This achieves the inner ring of the wire retaining ring 10 being inserted into the outer ring groove 9011, and the outer ring being inserted into the inner ring groove of the outer retaining ring 11. At this time, the assembly of the wire retaining ring 10 and the outer retaining ring 11 is completed.

[0053] In this embodiment, when the support shaft 102 is in a rigid support state, the steel wire retaining ring 10 is installed by pressing down the press assembly 3 once. When the switching assembly 2 switches the support shaft 102 to a flexible support state, the outer retaining ring 11 is installed by pressing down the press assembly 3 a second time. This replaces the previous manual operation, improves the installation accuracy and reduces the scrap rate of parts.

[0054] In some examples, the switching component 2 includes a first linear reciprocating drive mechanism 201 and a support plate 202 connected to the output end of the first linear reciprocating drive mechanism 201. When the support plate 202 is supported between the support shaft 102 and the support seat 101, the support seat 101, the support plate 202 and the support shaft 102 are rigidly connected in sequence, and the support shaft 102 is in a rigid support state. When the support plate 202 is separated from the support shaft 102, the support shaft 102 is in a flexible support state. The first linear reciprocating drive mechanism 201 can be, but is not limited to, a cylinder, an electric push rod, etc., which can drive the support plate 202 to reciprocate laterally so that the support plate 202 provides or abandons rigid support for the support shaft 102, thereby causing the support seat 101 to repeatedly switch between a rigid support state and a flexible support state.

[0055] In some examples, an elastic element 103 is provided between the support shaft 102 and the support base 101. The elastic element 103 may be a spring. When the support plate 202 is separated from the support shaft 102, the elastic element 103 supports the support shaft 102 and the support base 101 to form a flexible support state. The support shaft 102 can drive the output shaft 901 on it to float up and down.

[0056] In some examples, the press-fitting device further includes a lifting assembly 5 for driving the support assembly 1 to rise and fall, and a limiting assembly 4 for pressing the gear 902 to expose the outer ring groove 9011 on the output shaft 901 when the support assembly 1 drives the one-way valve 9 to move upward.

[0057] The output end of the lifting component 5 is connected to the support base 101 to drive the support base 101 and its components to rise and fall. The lifting component 5 can be, but is not limited to, a cylinder or an electric push rod, etc.

[0058] Because the bottom of gear 902 is equipped with a spring 904, after gear 902 is fitted onto output shaft 901, it cannot move downward under the elastic force of spring 904. Therefore, the outer ring groove 9011 on output shaft 901 will be blocked. The outer ring groove 9011 can be exposed for assembly by lifting component 5 and limiting component 4. The specific operation process is as follows: when lifting component 5 drives support base 101 to move upward, housing 903 and output shaft 901 move upward synchronously, and gear 902 on output shaft 901 moves upward synchronously. Limiting component 4 is activated, and limiting component 4 extends to press gear 902 to restrict its upward movement. At this time, relative movement occurs between gear 902 and output shaft 901. Gear 902 moves downward relative to output shaft 901 to expose outer ring groove 9011.

[0059] In some examples, the limiting component 4 includes a second linear reciprocating drive mechanism 401 and a pressure plate 402 connected to the output end of the second linear reciprocating drive mechanism 401. The second linear reciprocating drive mechanism 401 may be, but is not limited to, a cylinder or an electric push rod, etc. The second linear reciprocating drive mechanism 401 drives the pressure plate 402 to reciprocate laterally to limit the upward movement of the gear 902 or release the restriction on the gear 902.

[0060] In some examples, the support base 101 has a shaft cavity 1011 for inserting the support shaft 102 and a support cavity 1012 communicating with the shaft cavity 1011 for the support plate 202 to enter. The bottom of the shaft cavity 1011 is sealed, and the top is for the support shaft 102 to enter. The top of the shaft cavity 1011 has a limiting step for preventing the support shaft 102 from moving upward out of the shaft cavity 1011. The cavity wall of the shaft cavity 1011 and the bottom surface of the support shaft 102 enclose a mounting cavity for installing the elastic element 103. Preferably, the bottom surface of the support shaft 102 is recessed to form a groove for installing part of the elastic element 103.

[0061] In some examples, the support plate 202 has two spaced-apart support arms 2021 to form an opening groove between them for accommodating the elastic element 103. When the two support arms 2021 support the support shaft 102, part of the elastic element 103 is located in the opening groove. When the two support arms 2021 release their support from the support shaft 102, the support arms 2021 can be separated from the elastic element 103 through the opening groove. This structure provides installation space for the elastic element 103 while increasing the contact area with the support shaft 102, thereby improving the support stability. The support plate 202 also has a limiting part 2022 that abuts against the outer peripheral wall of the support seat 101 to limit its movement.

[0062] In some examples, the support base 101 includes an upper base 1013 and a lower base 1014 that are fixedly connected, which together form the aforementioned support cavity 1012. The separate support base 101 makes the support cavity 1012 and the shaft cavity 1011 easier to form and reduces the processing difficulty.

[0063] In some examples, a guide cone 6 is also included, which is fixed to the top of the output shaft 901 for the wire retaining ring 10 to be fitted. The bottom of the guide cone 6 has a protruding positioning part, and the end of the output shaft 901 has a recessed positioning hole for the positioning part to be inserted. The guide cone 6 is positioned by the positioning part cooperating with the positioning hole.

[0064] In some examples, the pressing device further includes a base 7 on which a guide rod 8 is fixed. The support 101 has a guide hole through which the guide rod 8 passes. The guide rod 8 cooperates with the guide hole to guide the lifting and lowering of the support 101.

[0065] Working principle:

[0066] During press fitting, the one-way device 9 is first placed on the support assembly 1. The support base 101 is supported at the bottom of the housing 903, and the support shaft 102 is supported at the bottom of the output shaft 901 and is a rigid support. Then, the spring 904 and the gear 902 are put on the output shaft 901 in sequence. Because the spring 904 is located at the bottom of the gear 902, the gear 902 cannot move down under the elastic force of the spring 904 after it is put on the output shaft 901. The outer ring groove 9011 on the output shaft 901 will be blocked. Then, the second linear reciprocating drive mechanism 401 is started, which drives the pressure plate 402 to move above the gear 902. The lifting assembly 5 is started, which drives the support assembly 1 and the one-way device 9 on it to move up synchronously. Under the pressure of the pressure plate 402, the gear 902 cannot move up, which makes the outer ring groove 9011 on the output shaft 901 exposed.

[0067] Then, the outer retaining ring 11 and the wire retaining ring 10 are sequentially placed on the guide cone 6, and the guide cone 6 is fixed to the end of the output shaft 901. Because the inner diameter of the outer retaining ring 11 is larger, it slides down to the bottom of the outer ring groove 9011 under the action of gravity, while the inner diameter of the wire retaining ring 10 is smaller, and it is stuck on the guide cone 6. The pressing assembly 3 is activated, and the pressing head 301 presses down to press the wire retaining ring 10 on the guide cone 6 into the outer ring groove 9011, and then the pressing head 301 is reset.

[0068] Then the first linear reciprocating drive mechanism 201 is started. The support plate 202 moves backward and can no longer provide rigid support for the support shaft 102. At this time, the support shaft 102 is flexibly supported by the elastic element 103 located at its bottom. At this time, the pressure head 301 presses down again and drives the output shaft 901 to move down. The gear 902 on the output shaft 901 moves down synchronously. When the gear 902 abuts against the limiting ring 9031 of the housing 903, its downward movement path is blocked. The gear 902 moves up relative to the output shaft 901 to push the outer retaining ring 11 to move up, thereby allowing the wire retaining ring 10 to enter the outer retaining ring 11. The inner ring of the wire retaining ring 10 is inserted into the outer ring groove 9011, and the outer ring is inserted into the inner ring groove of the outer retaining ring 11. At this time, the wire retaining ring 10 and the outer retaining ring 11 are assembled.

[0069] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A retaining ring pressing device for a speed reducer starter, used to press the retaining ring into the outer annular groove (9011) of the output shaft (901) of a one-way valve (9) to restrict the slippage of the gear (902) sleeved on the output shaft (901), the retaining ring comprising a wire retaining ring (10) embedded in the outer annular groove (9011) and an outer retaining ring (11) covering the outside of the wire retaining ring (10), characterized in that: The pressing device includes: The support assembly (1) includes a support base (101) for supporting the housing (903) of the one-way device (9) and a support shaft (102) mounted on the support base (101) for supporting the output shaft (901) of the one-way device (9). The support shaft (102) has a rigid support state and a flexible support state. The switching component (2) is used to switch the support shaft (102) from a rigid support state to a flexible support state so that the output shaft (901) and the housing (903) can move relative to each other. and press-fit assembly (3), which is used to press the wire retaining ring (10) into the outer ring groove (9011) from top to bottom when the support shaft (102) is in a rigid support state, and is used to press down again and push the output shaft (901) down when the support shaft (102) switches to a flexible support state. The gear (902) sleeved on the output shaft (901) moves down and is blocked by the limiting ring (9031) of the housing (903) and moves up relative to the output shaft (901) and presses the outer retaining ring (11) from bottom to top to engage with the wire retaining ring (10); The switching component (2) includes a first linear reciprocating drive mechanism (201), a support plate (202) connected to the output end of the first linear reciprocating drive mechanism (201), and an elastic element (103) disposed between the support shaft (102) and the support seat (101). When the support plate (202) is supported between the support shaft (102) and the support seat (101), the support shaft (102) is in a rigid support state. When the support plate (202) is separated from the support shaft (102), the elastic element (103) is supported between the support shaft (102) and the support seat (101) to form a flexible support state.

2. The deceleration starter retaining ring pressing device according to claim 1, characterized in that: The press-fitting device also includes a lifting assembly (5) for driving the support assembly (1) to rise and fall, and a limiting assembly (4) for pressing the gear (902) when the support assembly (1) drives the one-way device (9) to move upward so that the outer ring groove (9011) on the output shaft (901) is exposed.

3. The deceleration starter retaining ring press-fitting device according to claim 2, characterized in that: The limiting component (4) includes a second linear reciprocating drive mechanism (401) and a pressure plate (402) connected to the output end of the second linear reciprocating drive mechanism (401).

4. The deceleration starter retaining ring press-fitting device according to claim 1, characterized in that: The support base (101) has a shaft cavity (1011) for inserting the support shaft (102) and a support cavity (1012) communicating with the shaft cavity (1011) for the support plate (202) to enter. The cavity wall of the shaft cavity (1011) and the bottom surface of the support shaft (102) form an installation cavity for installing the elastic element (103).

5. The deceleration starter retaining ring pressing device according to claim 1, characterized in that: The support plate (202) has two spaced-apart support arms (2021) to form an opening slot between them for receiving an elastic element (103), and the support plate (202) has a limiting portion (2022) that abuts against the outer peripheral wall of the support base (101) to limit its range of movement.

6. The deceleration starter retaining ring press-fitting device according to claim 4, characterized in that: The support base (101) includes an upper base (1013) and a lower base (1014) that are fixedly connected, and the two together form the aforementioned support cavity (1012).

7. The deceleration starter retaining ring pressing device according to claim 1, characterized in that: It also includes a guide cone (6) fixed to the top of the output shaft (901) for the wire retaining ring (10) to be fitted.

8. The deceleration starter retaining ring press-fitting device according to claim 1, characterized in that: The pressing device also includes a base (7), on which a guide rod (8) is fixed, and the support (101) has a guide hole through which the guide rod (8) passes.

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