Angle positioning device for gear metal shaft insert mold
By setting limiting grooves and slidable limit blocks in the rear mold insert of the gear mold, and using elastic members to push the limit blocks, the problem of inaccurate limits when the shaft hole size is slightly larger than the metal shaft is solved, and the angular accuracy requirements between the metal shaft and the gear connection parts are achieved, and production consistency is improved.
Patent Information
- Application Number
- CN202422165262.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-04
AI Technical Summary
When the shaft hole size of the existing gear mold is slightly larger than that of the metal shaft, the calibration surface cannot accurately limit the metal shaft, resulting in the angular accuracy of the metal shaft and the gear connection part cannot be guaranteed.
A slidable limit block is provided in the limit slot of the rear mold insert, and the limit block is pushed by the elastic member so that its limit surface limits the metal shaft in the shaft hole through the communicating port, thereby ensuring angular accuracy.
By combining the shaft hole size and limit block slightly larger than the metal shaft, the angular accuracy requirements between the metal shaft and the gear connection parts are achieved, production consistency is improved, and batch manufacturing is facilitated.
Smart Images
Figure CN222959095U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear injection molds, and particularly relates to an angular positioning device for a gear metal shaft insert mold. Background Art
[0002] In recent years, the automotive industry has been developing vigorously towards the direction of intelligence and automation, and there are more and more actuators such as motors used in new energy vehicles. With the continuous improvement of customer requirements, the control accuracy requirements for actuators are becoming more and more stringent. For example, when the automotive ECU gives an instruction to the actuator, the motor sometimes has to move at a very small angle, and the movement of the output shaft end on the motor is also relatively small, which requires a relatively high angular accuracy for the connection part between the gear and the output shaft.
[0003] The output shaft on the motor is generally a metal shaft. When the gear is produced, it needs to be integrally connected with the metal shaft. Currently, the processing mold generally includes three parts, namely the front mold insert, the gear blank part, and the rear mold insert. The interior of the gear blank part is provided with a cavity for gear forming. The front mold insert and the rear mold insert are respectively arranged on the front side and the rear side of the gear blank part to enclose the cavity. The rear mold insert is provided with a shaft hole penetrating through to the cavity, and the metal shaft is inserted into the shaft hole. After the raw material is filled into the cavity, the metal shaft can be integrally connected with the gear. The circumferential side wall of the shaft hole has a flat calibration surface. The shape of the metal shaft is the same as that of the shaft hole, and the angular accuracy of the connection part between the metal shaft and the gear is ensured by the limitation of the metal shaft by the calibration surface. However, on the one hand, due to the characteristics of the steel, the mold has the phenomenon of thermal expansion and contraction. When the environmental temperature is relatively low, the shaft hole will become smaller, resulting in the metal shaft being unable to be inserted into the shaft hole. On the other hand, there are also processing dimension errors in the metal shaft itself, which will also cause the metal shaft to be unable to be placed in the shaft hole. Therefore, the size of the shaft hole needs to be made slightly larger than the metal shaft. However, if the shaft hole is made slightly larger than the metal shaft, it will cause the calibration surface to be unable to accurately limit the metal shaft, and the angular accuracy requirements for the connection part between the metal shaft and the gear cannot be guaranteed. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problem that when the size of the shaft hole of the mold in the prior art is slightly larger than the metal shaft, the calibration surface of the shaft hole cannot accurately limit the metal shaft, and the angular accuracy requirements for the connection part between the metal shaft and the gear cannot be guaranteed.
[0005] To solve the above problems, the present utility model provides an angular positioning device for a gear metal shaft insert mold, which includes a front mold insert, a gear blank and a rear mold insert. A cavity is provided inside the gear blank. The front mold insert and the rear mold insert are respectively arranged on the front side and the rear side of the gear blank to enclose the cavity. The rear mold insert is provided with a shaft hole penetrating through to the cavity. The circumferential wall of the shaft hole has a flat calibration surface. It is characterized in that a limiting groove is opened inside the rear mold insert. The limiting groove has a communication port penetrating through to the calibration surface of the shaft hole. A slidable limiting block is arranged in the limiting groove, and the sliding direction of the limiting block is perpendicular to the calibration surface. A limiting surface parallel to the calibration surface is provided on one side of the limiting block close to the communication port. The rear mold insert is further provided with an elastic member. The elastic member acts on the limiting block and applies a thrust force towards the communication port to the limiting block, so that the limiting surface of the limiting block limits the metal shaft in the shaft hole through the communication port.
[0006] Compared with the prior art, in the above solution, by providing a limiting groove in the rear mold insert and arranging a limiting block in the limiting groove, on the one hand, the size of the shaft hole can be slightly larger than that of the metal shaft for the metal shaft to be inserted. On the other hand, when the metal shaft enters the shaft hole, the elastic member will push the limiting block to move towards the communication port, so that the limiting surface of the limiting block limits the metal shaft in the shaft hole through the communication port, ensuring the angular accuracy of the metal shaft relative to the calibration surface, thereby meeting the angular accuracy requirements of the connecting part between the metal shaft and the gear in the cavity, having good production consistency and being convenient for batch manufacturing.
[0007] In an improved solution, the limiting groove is strip-shaped and has a rectangular cross-section. The long side of the limiting groove is parallel to the calibration surface and perpendicular to the axial direction of the rear mold insert. The front and rear groove walls of the limiting groove are both perpendicular to the axial direction of the rear mold insert, and the front and rear groove walls of the limiting groove are respectively slidably attached to the front and rear side walls of the limiting block. The groove width M of the limiting groove is greater than the width N of the limiting block, so that the limiting block can slide in the limiting groove in a direction perpendicular to the calibration surface. The limiting groove is strip-shaped and has a rectangular cross-section, which is convenient for processing and maintenance. The front and rear groove walls of the limiting groove are respectively slidably attached to the front and rear side walls of the limiting block, so as to effectively guide the sliding direction of the limiting block.
[0008] In an improved solution, the elastic member is a spring. A receiving groove is provided on the groove wall of the limiting groove on the side far from the communication port. The spring is installed in the receiving cavity and has a pushing end abutting against the limiting block, so as to apply a thrust force towards the communication port to the limiting block through the spring.
[0009] In an improved solution, the communication port is located in the middle of the limit groove, the limiting surface is located in the middle of the limiting block, there are two accommodating grooves which are respectively opened at both ends of the limit groove, and a spring is arranged in each accommodating groove. The pushing ends of the two springs respectively abut against both ends of the limiting block, so that the pushing of the spring on the limiting block is more stable.
[0010] In an improved solution, the accommodating groove penetrates through the outer peripheral wall of the rear mold insert, so as to facilitate the assembly and maintenance of the spring in the accommodating groove.
[0011] In an improved solution, the front mold insert is provided with an injection hole penetrating through to the cavity, so as to inject raw materials into the cavity through the injection hole of the front mold insert.
[0012] In an improved solution, the aperture of the injection hole gradually decreases along the direction close to the cavity, so as to facilitate the injection of raw materials into the cavity. Description of the Drawings
[0013] Figure 1 It is an exploded schematic view of an angle positioning device of a gear metal shaft insert mold;
[0014] Figure 2 It is a front view schematic view of an angle positioning device of a gear metal shaft insert mold;
[0015] Figure 3 It is along Figure 2 The sectional view taken along the section line A-A in
[0016] Figure 4 It is along Figure 2 The sectional view taken along the section line B-B in
[0017] Figure 5 It is a cross-sectional schematic view of the rear mold insert of an angle positioning device of a gear metal shaft insert mold.
[0018] Description of the reference numerals,
[0019] 1. Front mold insert; 11. Injection hole; 2. Gear blank part; 21. Cavity; 3. Rear mold insert; 31. Shaft hole; 311. Calibration surface; 312. Communication port; 32. Limit groove; 33. Accommodating groove; 4. Limiting block; 5. Spring; 6. Metal shaft. Detailed Embodiments
[0020] Those skilled in the art should understand that the following embodiments are only used to explain the technical principle of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.
[0021] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0022] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.
[0023] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Please refer to Figures 1-5 , an angle positioning device for a gear metal shaft insert mold provided by an embodiment of the present utility model includes a front mold insert 1, a gear blank 2, and a rear mold insert 3. A cavity 21 is provided inside the gear blank 2. The front mold insert 1 and the rear mold insert 3 are respectively arranged on the front side and the rear side of the gear blank 2 to enclose the cavity 21. The rear mold insert 3 is provided with a shaft hole 31 that penetrates through to the cavity 21. A flat calibration surface 311 is provided on the circumferential wall of the shaft hole 31. It is characterized in that a limiting groove 32 is opened inside the rear mold insert 3. The limiting groove 32 has a communication port 312 that penetrates through to the calibration surface 311 of the shaft hole 31. A slidable limiting block 4 is provided in the limiting groove 32, and the sliding direction of the limiting block 4 is perpendicular to the calibration surface 311. A limiting surface parallel to the calibration surface 311 is provided on one side of the limiting block 4 close to the communication port 312. The rear mold insert 3 is further provided with an elastic member, and the elastic member acts on the limiting block 4 and applies a thrust towards the communication port 312 to the limiting block 4, so that the limiting surface of the limiting block 4 limits the metal shaft 6 in the shaft hole 31 through the communication port 312.
[0025] In the above solution, a limiting groove 32 is provided in the rear mold insert 3, and a limiting block 4 is provided in the limiting groove 32. Thus, on the one hand, the size of the shaft hole 31 can be slightly larger than that of the metal shaft 6 for the metal shaft 6 to be inserted. On the other hand, when the metal shaft 6 enters the shaft hole 31, the elastic member will push the limiting block 4 to move towards the communication port 312, so that the limiting surface of the limiting block 4 limits the metal shaft 6 in the shaft hole 31 through the communication port 312, ensuring the angular accuracy of the metal shaft 6 relative to the calibration surface 311, thereby meeting the angular accuracy requirements of the connection part between the metal shaft 6 and the gear in the cavity 21, with good production consistency and being convenient for batch manufacturing.
[0026] In this embodiment, the limiting groove 32 is strip-shaped and has a rectangular cross-section. The long side of the limiting groove 32 is parallel to the calibration surface 311 and perpendicular to the axial direction of the rear mold insert 3. The front and rear groove walls of the limiting groove 32 are perpendicular to the axial direction of the rear mold insert 3, and the front and rear side walls of the limiting groove 32 are respectively slidably attached to the front and rear side walls of the limiting block 4. The groove width M of the limiting groove 32 is larger than the width N of the limiting block 4, so that the limiting block 4 can slide in the limiting groove 32 in a direction perpendicular to the calibration surface 311. The limiting groove 32 is strip-shaped and has a rectangular cross-section, which is convenient for processing and maintenance. The front and rear side walls of the limiting groove 32 are respectively slidably attached to the front and rear side walls of the limiting block 4, so as to effectively guide the sliding direction of the limiting block 4.
[0027] In this embodiment, the elastic member is a spring 5. A receiving groove 33 is provided on the groove wall of the limiting groove 32 on the side away from the communication port 312. The spring 5 is installed in the receiving cavity and has a pushing end abutted against the limiting block 4, so as to apply a thrust towards the communication port 312 to the limiting block 4 through the spring 5.
[0028] In this embodiment, the communication port 312 is located in the middle of the limiting groove 32, the limiting surface is located in the middle of the limiting block 4, there are two receiving grooves 33 and they are respectively opened at both ends of the limiting groove 32. A spring 5 is provided in each receiving groove 33, and the pushing ends of the two springs 5 are respectively abutted against both ends of the limiting block 4, so that the pushing of the spring 5 on the limiting block 4 is more stable.
[0029] It should be understood that only one receiving groove 33 can also be provided and the receiving groove 33 is provided in the middle of the limiting groove 32. At this time, the pushing end of the spring 5 in the receiving groove 33 abuts against the middle of the limiting block 4, and the thrust towards the communication port 312 can also be applied to the limiting block 4.
[0030] Furthermore, the receiving groove 33 penetrates through to the outer peripheral wall of the rear mold insert 3, so as to facilitate the assembly and maintenance of the spring 5 in the receiving groove 33.
[0031] In this embodiment, the front mold insert 1 is provided with an injection hole 11 that penetrates through to the cavity 21, so as to inject raw materials into the cavity 21 through the injection hole 11 of the front mold insert 1. Further, the aperture of the injection hole 11 gradually decreases in the direction close to the cavity 21, so as to facilitate the injection of raw materials into the cavity 21.
[0032] It should be noted that in the description of the present application, terms indicating directions or positional relationships such as "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application; all directional indications (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative positional relationships and movement conditions between components in a specific posture. If this specific posture changes, then the directional indication also changes accordingly.
[0033] In the description of the present application, the description with reference to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0034] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims
1. A gear metal shaft insert mold angle positioning device, comprising a front mold insert (1), a tooth blank (2) and a rear mold insert (3), wherein a cavity (21) is provided inside the tooth blank (2), the front mold insert (1) and the rear mold insert (3) are respectively arranged on the front side and the rear side of the tooth blank (2) to achieve the enclosure of the cavity (21), the rear mold insert (3) is provided with an axial hole (31) penetrating to the cavity (21), and the side peripheral wall of the axial hole (31) has a flush calibration surface (311), characterized in that: A limiting groove (32) is provided inside the rear mold insert (3), the limiting groove (32) having a connecting opening (312) penetrating to the calibration surface (311) of the shaft hole (31), a slidable limiting block (4) is provided inside the limiting groove (32), and the sliding direction of the limiting block (4) is perpendicular to the calibration surface (311), and a limiting surface parallel to the calibration surface (311) is provided on a side of the limiting block (4) close to the connecting opening (312), and the rear mold insert (3) is also provided with an elastic member, the elastic member acts on the limiting block (4) and applies a thrust toward the connecting opening (312) to the limiting block (4), so that the limiting surface of the limiting block (4) limits the metal shaft (6) in the shaft hole (31) through the connecting opening (312).
2. The gear metal shaft insert mold angle positioning device according to claim 1, characterized in that: The limiting groove (32) is in the shape of an elongated strip and has a rectangular cross section. The long side of the limiting groove (32) is parallel to the calibration surface (311) and perpendicular to the axial direction of the rear mold insert (3). The groove walls of the limiting groove (32) in the front and rear directions are perpendicular to the axial direction of the rear mold insert (3). The front groove wall and the rear groove wall of the limiting groove (32) are respectively slidably fitted to the front side wall and the rear side wall of the limiting block (4). The groove width M of the limiting groove (32) is greater than the width N of the limiting block (4), so that the limiting block (4) can slide in the limiting groove (32) along a direction perpendicular to the calibration surface (311).
3. The gear metal shaft insert mold angle positioning device according to claim 1 or 2, characterized in that: The elastic member is a spring (5), a groove wall of the limiting groove (32) on a side away from the connecting port (312) is provided with a receiving groove (33), and the spring (5) is installed in the receiving cavity and has a pushing end abutting against the limiting block (4).
4. The gear metal shaft insert mold angle positioning device according to claim 3, characterized in that: The communication port (312) is located in the middle of the limiting groove (32), the limiting surface is located in the middle of the limiting block (4), there are two accommodating grooves (33) respectively opened at the two ends of the limiting groove (32), each accommodating groove (33) is provided with a spring (5), and the pushing ends of the two springs (5) are respectively abutted against the two ends of the limiting block (4).
5. The gear metal shaft insert mold angle positioning device according to claim 4, characterized in that: The accommodating groove (33) passes through the outer peripheral wall of the rear mold insert (3).
6. The gear metal shaft insert mold angle positioning device according to claim 1, characterized in that: The front mold insert (1) is provided with an injection hole (11) penetrating to the mold cavity (21).
7. The gear metal shaft insert mold angle positioning device according to claim 6, characterized in that: The diameter of the injection hole (11) gradually decreases in a direction approaching the mold cavity (21).