Inner wall type cooling positioner

Abstract

The utility model relates to the technical field of metal surface heat treatment, and discloses an inner wall type cooling positioner which comprises a spraying pipe, a pipe cavity used for conveying cooling liquid is formed in the spraying pipe, one end of the pipe cavity is connected with a base, and a detachable top cover used for positioning key holes in shaft products is installed at the other end of the pipe cavity. A liquid inlet hole is formed in the end, close to the base, of the spraying pipe, a spraying hole is formed in the end, close to the top cover, of the spraying pipe, and the liquid inlet hole and the spraying hole are both communicated with the pipe cavity. Cooling liquid can enter the pipe cavity through the liquid inlet hole and then is sprayed out through the spraying holes along the pipe cavity. One end of the spraying pipe is installed on a clamp such as a chuck through the base, the other end of the spraying pipe is embedded into a spline hole of a shaft product to achieve positioning, meanwhile, the spraying effect can be achieved, the original tissue toughness of the core of the product is kept, heat transfer caused by external heating is eradicated, and deformation and shrinkage caused by heating of the spline hole are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of metal surface heat treatment, in particular to an inner wall type cooling positioner. Background Art

[0002] For the convenience of processing, the existing clamping tools for fixing shaft products mostly use the ejector pin, that is, the ejector pin is pressed against the end of the shaft product, and the center holes at both ends of the shaft product are used to position and clamp the product. Although this method is convenient in the production process of the product, it still has certain limitations. For example, the design of some new energy vehicle motor shafts is to change the center holes at both ends of the shaft into internal and external splines, and both require high-frequency heat treatment.

[0003] During the heat treatment of the motor shaft, if the existing positioner is used for clamping and fixing, when the outer diameter is heated, the heat generated by the heating will be transferred to the spline hole, affecting the heating of the inner wall of the spline hole and causing it to shrink and deform. Utility Model Content

[0004] The problem to be solved by the utility model is to provide an inner wall cooling positioner, one end of the spray pipe can be installed on a fixture such as a chuck through a base, and the other end can be embedded in the spline hole at the end of the shaft product, and the positioning of the product is achieved by abutting the top cover with the spline hole, and at the same time, the coolant can also be sprayed from the liquid inlet hole along the tube cavity through the spray hole to the inner wall of the spline hole. The spraying effect allows the core of the product to maintain the original tissue toughness, eliminates the transferred heat caused by external heating, and avoids the deformation and shrinkage caused by the heat of the spline hole.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An inner wall cooling positioner comprises a spray pipe, wherein a tube cavity for conveying coolant is provided inside the spray pipe, one end of the tube cavity is connected to a base, and a detachable top cover for positioning a key hole on an axis product is installed at the other end; a liquid inlet hole is provided on one end of the spray pipe close to the base, a spray hole is provided on one end of the spray pipe close to the top cover, and the liquid inlet hole and the spray hole are both communicated with the tube cavity.

[0007] Optionally, the top cover includes a first mounting portion installed at the end of the spray pipe, one end of the first mounting portion is connected to a first positioning portion, a hemispherical structure is adopted at the middle position of the first positioning portion, and a first top hole connected to the tube cavity is opened at the middle position of the first positioning portion.

[0008] Optionally, the top cover includes a second mounting portion, a second positioning portion and a top cap portion that are integrally connected and formed, and the second positioning portion is located between the second mounting portion and the top cap portion;

[0009] The second mounting portion is arranged at the end of the spray pipe, the outer circumferential surface of the second positioning portion is provided with hanging teeth that can engage with the internal teeth of the spline hole, a second top hole is opened at the middle position of one side of the top cap portion, and the sides of the second positioning portion and the top cap portion are both provided with side holes, and the second top hole and the side holes are both connected to the tube cavity.

[0010] Optionally, a sleeve is provided on the outer side of the spray pipe, one end of the sleeve extends to the outside of the base, and a transfer cavity is formed between the spray pipe, the base and the sleeve, a liquid injection port is opened on the circumferential surface of the sleeve, and the liquid injection port is connected with the tube cavity through the transfer cavity and the liquid inlet hole.

[0011] Optionally, two opposing bearings are provided between the spray pipe and the sleeve, and the liquid inlet, the liquid injection port and the transfer chamber are all located between the two bearings.

[0012] Optionally, sealing rings are provided on contact surfaces of the sleeve, the spray pipe and the base.

[0013] Optionally, the tubular cavity includes a boosting section and a liquid inlet section and a spray section connected by the boosting section, the boosting section adopts a conical structure, the inner diameter of the liquid inlet section is larger than the inner diameter of the spray section, and the liquid inlet hole and the spray hole are respectively opened on the outside of the liquid inlet section and the spray section.

[0014] Optionally, the top cover and the spray pipe are connected via threads. Beneficial Effects

[0015] (1) In the utility model, the coolant can enter the tube cavity through the liquid inlet hole and then be sprayed out along the tube cavity through the spray hole; one end of the spray pipe is installed on a fixture such as a chuck through a base, and the other end is embedded in the spline hole of the shaft product, and cooperates with the spline hole of the shaft product to achieve the positioning of the shaft product. At the same time, the spray effect can be implemented to allow the core of the product to maintain the original structural toughness, eliminate the transfer of heat caused by external heating, and avoid affecting the deformation and shrinkage of the spline hole due to heating; and because the top cover is detachable and replaceable, the application range of the device is greatly improved and the cost is reduced.

[0016] (2) In the present invention, the relative rotation between the sleeve and the spray pipe can be achieved through the bearing, so that when the external water pipe is connected to the liquid injection port, the water pipe will not rotate with the base under the action of the external clamp, thereby avoiding the trouble of entanglement and greatly simplifying the structure of the device.

[0017] (3) In the present invention, since the inner diameter of the liquid inlet section is larger than the inner diameter of the spray section, and the boost section adopts a conical structure, when the coolant passes from the liquid inlet section through the boost section and enters the spray section, the water pressure will increase, thereby improving the spraying effect of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the assembly structure of the spray pipe and the bearing of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the spray pipe of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the top cover of the utility model;

[0023] Figure 6 This is a structural schematic diagram of the hanging tooth of the utility model;

[0024] Among them, 1. spray pipe; 11. liquid inlet hole; 12. spray hole; 2. base; 3. top cover; 31. first mounting part; 32. first positioning part; 33. first top hole; 34. second mounting part; 35. second positioning part; 36. top cap part; 37. second top hole; 38. side hole; 39. hanging tooth; 4. sleeve; 5. bearing; 6. sealing ring; 7. liquid filling port; 8. tube cavity; 81. liquid inlet section; 82. pressurization section; 83. spray section. DETAILED DESCRIPTION

[0025] The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention. Embodiment 1

[0026] like Figure 1 , Figure 2 , Figure 4 As shown, an inner wall cooling positioner comprises a spray pipe 1, a base 2 and a detachable top cover 3 for positioning key holes on shaft products. A tube cavity 8 for conveying coolant is provided inside the spray pipe 1. The tube cavity 8 axially passes through both ends of the spray pipe 1, and one end of the tube cavity 8 is connected to the base 2, and the other end is connected to the top cover 3; a liquid inlet hole 11 is provided on one end of the spray pipe 1 close to the base 2, and a spray hole 12 is provided on one end of the spray pipe 1 close to the top cover 3, and both the liquid inlet hole 11 and the spray hole 12 are connected to the tube cavity 8.

[0027] Under the action of the external liquid supply equipment for providing and pumping the coolant, the coolant can enter the interior of the tube cavity 8 through the liquid inlet hole 11, and then be sprayed along the tube cavity 8 through the spray hole 12 to the inner wall of the spline hole; one end of the spray pipe 1 can be installed on an existing fixture such as a chuck through the base 2, and the other end can be embedded in the spline hole of the shaft product to achieve positioning. At the same time, the device can also implement a spraying effect to allow the core of the product to maintain the original structural toughness, eliminate the transfer heat caused by external heating, and avoid affecting the deformation and shrinkage of the spline hole due to heating.

[0028] As mentioned above, there are multiple liquid inlet holes 11 and spray holes 12, all on the circumferential surface of the spray pipe 1, and the spray holes 12 can be opened at designated positions as needed to achieve precise temperature control, effectively maintain the toughness of the original structure of the product core, and avoid the expansion of the shaft due to high temperature during heat treatment, causing the spline hole to deform and shrink due to heat, affecting the performance and qualified rate of the product.

[0029] Furthermore, the top cover 3 and the spray pipe 1 are connected by threads; the threaded connection method realizes the detachable function between the two, which not only can realize the necessary sealing by the screwing between the internal and external threads, so that the coolant can be sprayed from the designated spray hole 12, but also can realize the quick replacement of the top cover 3. The type of derived inner wall cooling positioner can be made according to different products, so that the device can position and spray the cooling according to the center hole of the shaft end of different sizes and types, which greatly improves the application range of the device and reduces the cost.

[0030] In addition, the tubular cavity 8 includes a boosting section 82 and a liquid inlet section 81 and a spray section 83 connected by the boosting section 82. The boosting section 82 adopts a conical structure, the inner diameter of the liquid inlet section 81 is larger than the inner diameter of the spray section 83, and the liquid inlet hole 11 and the spray hole 12 are respectively opened on the outside of the liquid inlet section 81 and the spray section 83.

[0031] Under the condition of constant flow rate, the smaller the cross-section of the tube cavity 8 is, the greater the flow rate of the coolant through the cross-section is, and the inner diameter of the liquid inlet section 81 is larger than the inner diameter of the spray section 83, and the boost section 82 adopts a conical structure. Therefore, when the coolant enters the spray section 83 from the liquid inlet section 81 through the boost section 82, the water pressure will increase, so as to achieve the purpose of improving the coolant spraying effect.

[0032] like Figure 1-Figure 3 As shown, a sleeve 4 is sleeved on the outside of the spray pipe 1, one end of the sleeve 4 extends to the outside of the base 2, and a transfer cavity is formed between the spray pipe 1, the base 2 and the sleeve 4; a liquid injection port 7 is opened on the circumferential surface of the sleeve 4, and the liquid injection port 7 is connected to the tube cavity 8 through the transfer cavity and the liquid inlet hole 11.

[0033] The liquid supply interface of the external liquid supply device is connected to the positioner through the liquid injection port 7. After the coolant enters the transfer cavity through the liquid injection port 7, it passes through the liquid inlet hole 11 into the tube cavity 8, and then is transported through the tube cavity 8 and sprayed onto the inner wall of the spline hole through the spray hole 12, thereby achieving a spray cooling effect, maintaining the temperature of the inner wall of the spline hole during the heat treatment process, and avoiding its shrinkage and deformation.

[0034] Among them, the inner hole of the sleeve 4 adopts a stepped hole structure, the base 2 adopts a stepped shaft structure, and one end of the base 2 is embedded in the tube cavity 8 to close the end of the tube cavity 8; and a sealing ring 6 is provided on the contact surface between the sleeve 4 and the spray pipe 1 and the base 2; the sealing ring 6 can ensure the sealing of the transfer cavity to prevent the occurrence of coolant leakage during use.

[0035] Furthermore, two relative bearings 5 ​​are arranged between the spray pipe 1 and the sleeve 4, and the liquid inlet 11, the liquid injection port 7 and the transfer chamber are all located between the two bearings 5; the relative rotation between the sleeve 4 and the spray pipe 1 can be achieved through the bearings 5, so that when the external water pipe is connected to the liquid injection port 7, the water pipe will not rotate with the base 2 under the action of the external clamp, which can avoid the trouble of entanglement and greatly simplify the structure of the equipment. Embodiment 2

[0036] like Figure 5-Figure 6 As shown, based on the first embodiment, the top cover 3 includes a first mounting portion 31 installed at the end of the spray pipe 1, one end of the first mounting portion 31 is connected to a first positioning portion 32, a hemispherical structure is adopted at the middle position of the first positioning portion 32, and a first top hole 33 connected to the tube cavity 8 is opened at the middle position of the first positioning portion 32.

[0037] As mentioned above, the first mounting portion 31 and the first positioning portion 32 adopt an integrally formed structure; the outer diameter of the first positioning portion 32 is larger than the outer diameter of the first mounting portion 31, and the internal thread is opened on the inner side of the first mounting portion 31, so as to facilitate the rapid disassembly and replacement between the top cover 3 and the spray pipe 1; the first positioning portion 32 of a hemispherical structure is adopted at the middle position, and its top is an arc surface, and the outer side of the arc surface is a plane, and during the process of opening the spline hole, an arc surface will also be formed at its bottom, and the arc surface and the plane on the first positioning portion 32 are in contact and abutment with the bottom surface of the spline hole, so that the spray pipe 1 can be positioned in the hole, and the coolant can also be sprayed out through the first top hole 33 to cool the bottom surface of the spline hole.

[0038] Furthermore, in addition to using the bottom of the inner hole of the product workpiece as the positioning surface, a hanging tooth 39 can also be designed for a workpiece with an internal spline, and embedded in the internal spline to achieve the purpose of precise positioning and synchronous rotation.

[0039] Therefore, the top cover 3 can also adopt an integrally connected second mounting portion 34, a second positioning portion 35 and a top cap portion 36, and the second positioning portion 35 is located between the second mounting portion 34 and the top cap portion 36; the second mounting portion 34 is arranged at the end of the spray pipe 1, and the outer circumferential surface of the second positioning portion 35 is provided with hanging teeth 39 that can engage with the internal teeth of the spline hole, and a second top hole 37 is opened at the middle position of one side of the top cap portion 36, and the side surfaces of the second positioning portion 35 and the top cap portion 36 are both provided with side holes 38, and the second top hole 37 and the side hole 38 are both connected to the tube cavity 8.

[0040] As mentioned above, the hanging teeth 39 can mesh with the internal teeth of the spline hole to achieve precise synchronous rotation. At the same time, the end face of the top cap portion 36 is a plane, which contacts and abuts against the bottom surface of the spline hole, thereby completing the positioning of the product workpiece; at the same time, the coolant can also flow out through the second top hole 37 and the side hole 38 to spray cool the designated position.

[0041] In summary, the market share of new energy vehicles is increasing year by year. The designed motor shaft integrates the inner hole and inner spline with the outer rod, and the parts are common platform parts. Through this device, various types of inner holes and inner splines of the workpiece can be clamped, and the clamping process can be easily inserted. At the same time, it also plays a role in identification and will not be placed in the wrong direction.

[0042] The device is used to embed and support the workpiece. In addition to enabling it to rotate stably, the cooling spray holes 12 thereon can spray cooling on the inner wall of the inner hole or inner spline to prevent heat diffusion; and the base 2 is used together with the three-jaw chuck, which is driven to rotate by the chuck. In order to allow the coolant to spray out smoothly from the hole, the sleeve 4 and the spray pipe 1 are connected by a bearing 5 to ensure that the base 2 is disconnected from the three-jaw positioning position, so that the water inlet pipe will not rotate with the three-jaw.

[0043] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 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 by specific circumstances.

[0045] The above is based on the ideal embodiment of the utility model. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. An inner wall cooling positioner, characterized in that: It comprises a spray pipe (1), wherein a tube cavity (8) for conveying cooling liquid is provided inside the spray pipe (1), one end of the tube cavity (8) is connected to a base (2), and the other end is provided with a detachable top cover (3) for locating a key hole on a shaft product; A liquid inlet hole (11) is provided on one end of the spray pipe (1) close to the base (2), and a spray hole (12) is provided on one end of the spray pipe (1) close to the top cover (3), and both the liquid inlet hole (11) and the spray hole (12) are in communication with the tube cavity (8).

2. The inner wall cooling positioner according to claim 1, characterized in that: The top cover (3) comprises a first mounting portion (31) mounted on the end of the spray pipe (1), one end of the first mounting portion (31) is connected to a first positioning portion (32), a middle position of the first positioning portion (32) adopts a hemispherical structure, and a first top hole (33) communicating with the tube cavity (8) is opened at the middle position of the first positioning portion (32).

3. The inner wall cooling positioner according to claim 1, characterized in that: The top cover (3) comprises a second mounting portion (34), a second positioning portion (35) and a top cap portion (36) which are integrally connected and formed, and the second positioning portion (35) is located between the second mounting portion (34) and the top cap portion (36); The second mounting portion (34) is arranged at the end of the spray pipe (1); the outer circumferential surface of the second positioning portion (35) is provided with hanging teeth (39) that can mesh with the internal teeth of the spline hole; a second top hole (37) is provided at the middle position of one side of the top cap portion (36); the side surfaces of the second positioning portion (35) and the top cap portion (36) are both provided with side holes (38); and the second top hole (37) and the side hole (38) are both connected to the tube cavity (8).

4. The inner wall cooling positioner according to any one of claims 1 to 3, characterized in that: The outer side of the spray pipe (1) is sleeved with a sleeve (4), one end of the sleeve (4) extends to the outer side of the base (2), and a transfer cavity is formed between the spray pipe (1), the base (2) and the sleeve (4), a liquid injection port (7) is provided on the circumferential surface of the sleeve (4), and the liquid injection port (7) is connected to the tube cavity (8) through the transfer cavity and the liquid inlet hole (11).

5. The inner wall cooling positioner according to claim 4, characterized in that: Two opposing bearings (5) are provided between the spray pipe (1) and the sleeve (4), and the liquid inlet hole (11), the liquid injection port (7) and the transfer chamber are all located between the two bearings (5).

6. The inner wall cooling positioner according to claim 5, characterized in that: Sealing rings (6) are provided on the contact surfaces between the sleeve (4), the spray pipe (1) and the base (2).

7. The inner wall cooling positioner according to claim 1, characterized in that: The tube cavity (8) comprises a pressurizing section (82) and a liquid inlet section (81) and a spray section (83) connected via the pressurizing section (82); the pressurizing section (82) adopts a conical surface structure; the inner diameter of the liquid inlet section (81) is larger than the inner diameter of the spray section (83); and the liquid inlet hole (11) and the spray hole (12) are respectively arranged on the outside of the liquid inlet section (81) and the spray section (83).

8. The inner wall cooling positioner according to claim 1, characterized in that: The top cover (3) is connected to the spray pipe (1) via threads.

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