A hoisting tool for preventing planetary roller heat treatment bending deformation

Abstract

The utility model belongs to transmission device processing frock technical field relates to a kind of hoisting frock for preventing planetary roller heat treatment bending deformation, including base, multiple support frames and hoisting plate, the base with the hoisting plate is arranged in parallel up and down, multiple The support frame is vertically supported between the base and the hoisting plate, the base, support frame and hoisting plate form hollow hoisting container jointly;Array of elongated through slot is equipped on the hoisting plate, one end of the elongated through slot is round hole, the other end of the elongated through slot is semicircle;The diameter of the round hole is greater than the width of the elongated through slot, the diameter of the semicircle is equal to the width of the elongated through slot.In heat treatment, the hoisting frock of the utility model is used, so that planetary roller hoisting blank is vertically hung, and the direction of its gravity passes through support point, so that the bending moment generated by the planetary roller heat treatment blank due to its own gravity at the support point can be prevented, thereby effectively eliminating heat treatment bending deformation.

Description

Technical Field

[0001] This utility model relates to a lifting fixture for preventing planetary rollers from bending and deforming during heat treatment, belonging to the technical field of transmission device processing fixtures. Background Technology

[0002] like Figure 1 As shown, a planetary roller screw pair consists of a screw, a nut, rolling elements (planetary rollers), a planetary carrier, and an internal gear ring. It is a mechanical transmission device that can convert rotary motion into linear motion. Several planetary rollers, acting as rolling elements, pass through the annular space between the nut and the screw, maintaining parallel axes.

[0003] like Figure 2 As shown, the planetary rollers have external threads in the middle, which mesh with the external threads of the lead screw and the internal threads of the nut, transmitting force and motion through the combined effect of threaded drive and rolling helical drive. For the most commonly used standard and reverse planetary roller screw pairs, spur gears are also provided at both ends of the planetary rollers, meshing with internal gear rings embedded at both ends of the nut to counteract the tilting torque generated by the helix angle of the thread on the planetary rollers, thereby ensuring that all rollers are parallel to the axes of the lead screw and nut. To ensure that the planetary rollers are evenly distributed circumferentially between the lead screw and nut, short, thin cylindrical heads are provided on the outer sides of the spur gears at both ends to insert into the evenly distributed inner holes of the planetary carrier.

[0004] The multi-point, multi-pair, and multi-body transmission characteristics of planetary roller screw pairs give them advantages such as high thrust, high precision, high rigidity, and long service life. They are widely used in high-end precision equipment fields with medium to high loads, such as injection molding machines and high-precision heavy-duty machine tools, especially in the field of humanoid robots. Such high-end precision equipment requires planetary roller screw pairs to possess characteristics such as accurate positioning, smooth operation, and durability. Furthermore, to meet requirements such as lightweight design, high stiffness ratio, and high space utilization, the typical application of humanoid robots also necessitates planetary roller screw pairs that are slender, compact, and durable.

[0005] Therefore, the weakest link in a planetary roller screw pair—the transmission thread of the planetary rollers—must possess high precision and excellent service life. Simultaneously, all planetary rollers must smoothly rotate around their own axes while also smoothly revolving around the common axis of the screw and nut to achieve high precision, smooth operation, and low noise planetary motion performance.

[0006] To ensure the superior performance of planetary motion, in addition to requiring high dimensional accuracy in each part of the planetary roller, it is also required to have high overall straightness and dimensional accuracy such as coaxiality of the threaded part / gear part / short cylindrical head, so as to ensure the accuracy of thread meshing, gear meshing, and the fit between the cylindrical head and the planetary carrier.

[0007] Planetary rollers possess structural features combining those of threads, spur gears, and cylindrical heads. As parts with a large length-to-diameter ratio, their rigidity and overall straightness retention are inherently poor, making it difficult to achieve dimensional and positional accuracy. Furthermore, the quenching and tempering heat treatment process used to improve surface quality can easily lead to significant bending deformation, further increasing the difficulty of achieving overall straightness and coaxiality of the planetary rollers. This reduces the running accuracy of the planetary roller screw pair, thereby affecting the overall performance of the machine.

[0008] Summary of processing experience revealed that even with excellent machining equipment and a reasonable machining and heat treatment process, a certain proportion of planetary rollers still exhibited insufficient overall straightness and coaxiality, leading to defective products. Analysis and investigation revealed that, for ease of machining, the gears at both ends of the planetary rollers needed to be formed before surface hardening of the blank; and a section of coarse cylindrical end needed to be retained on one side of the planetary roller so that the center-mounted axis could be clamped by a clamp to transmit cutting torque. This factor resulted in a more complex shape for the planetary roller blanks during the quenching-tempering heat treatment process. When large batches of planetary roller blanks underwent quenching-tempering heat treatment, a certain proportion of the conventionally horizontally placed blanks inevitably exhibited a deviation of their center of gravity from the support point. Their own weight would generate bending moments at the support point, especially at the coarse cylindrical end. During heat treatment, this would cause axial bending deformation of the planetary roller blanks, thereby reducing the overall straightness and coaxiality of the planetary rollers in subsequent machining.

[0009] Therefore, a lifting fixture is needed to prevent planetary rollers from bending and deforming during heat treatment, in order to solve the problem of bending and deformation of planetary rollers during the quenching-tempering heat treatment process.

[0010] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present invention, and therefore may include information that does not constitute prior art. Utility Model Content

[0011] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.

[0012] The technical solution provided by this utility model is as follows: A lifting fixture for preventing bending deformation of planetary rollers during heat treatment includes a base, multiple support frames, and a lifting plate. The base and the lifting plate are arranged parallel to each other vertically. The multiple support frames are vertically supported between the base and the lifting plate. The base, support frames, and lifting plate together form a hollow lifting container. The lifting plate is provided with an array of slender through slots. One end of each slender through slot is a round hole, and the other end is a semicircle. The diameter of the round hole is greater than the width of the slender through slot, and the diameter of the semicircle is equal to the width of the slender through slot.

[0013] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: By using the planetary roller heat treatment hoisting fixture of this utility model, the placement method of the planetary roller hoisting blank in the quenching-tempering heat treatment can be changed. When the planetary roller hoisting blank is heat treated, the hoisting fixture of this utility model allows the planetary roller hoisting blank to be suspended vertically, with its gravity direction passing through the support point. This can prevent the bending moment generated at the support point by the planetary roller heat treatment blank due to its own weight, thereby effectively eliminating the bending deformation during heat treatment, improving the overall straightness and coaxiality of the planetary rollers, and thus improving the running accuracy of the planetary roller screw pair and the overall performance of the machine.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the support frame is a height-adjustable bolt structure, fixed between the base and the lifting plate by nuts.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the adjustable support frame with bolt structure can adjust the height of the lifting plate by nuts to adapt to the suspension requirements of planetary rollers lifting blanks of different sizes, while ensuring that the tooling maintains structural stability in high-temperature environments and avoids support failure due to thermal deformation.

[0017] Furthermore, the base is provided with weight-reducing holes and countersunk holes, the countersunk holes being used to install the bolt structure.

[0018] The beneficial effects of adopting the above-mentioned further solutions are that the weight-reducing hole design of the base can significantly reduce the overall weight of the tooling, making it easier to handle and install. At the same time, the countersunk hole design can hide the bolt heads, making the bottom surface of the tooling flatter and increasing the stability of the tooling placement.

[0019] Furthermore, it also includes a pressure plate for preventing the hoisted billet from falling off, the pressure plate covering the circular hole, and the pressure plate having a detachable structure.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the pressure plate covering the round hole blocks the path of the billet falling off, thus solving the problem of accidental falling off caused by vibration during the heat treatment process.

[0021] Furthermore, the lifting plate is provided with screw holes, and the pressure plate is fixed to the screw holes by screws.

[0022] The beneficial effect of adopting the above-mentioned further solution is that by fixing the pressure plate to the lifting plate with screws, the pressure plate can be quickly installed and disassembled, which is convenient for operation. At the same time, it ensures the stability of the pressure plate during the heat treatment process and further prevents the lifting billet from falling off.

[0023] Furthermore, it also includes planetary roller hoisting blanks, with multiple planetary roller hoisting blanks suspended on the elongated through slot.

[0024] The beneficial effect of adopting the above-mentioned further scheme is that it enables batch heat treatment of planetary roller-lifted billets.

[0025] Furthermore, the planetary roller hoisting blank includes a first spur gear, a second spur gear, and a central long cylinder, the central long cylinder being used for subsequent grinding of external threads; the first spur gear and the second spur gear are symmetrically arranged on both sides of the long cylinder, the tip circle diameter of the first spur gear and the second spur gear is not greater than the diameter of the long cylinder; the outer side of the first spur gear is provided with a short, thin cylindrical head for engaging with the inner hole of the planetary carrier; the outer side of the second spur gear is provided with a stepped shaft-shaped cylindrical head, the stepped shaft-shaped cylindrical head including a thin shaft and a thick shaft, the thick shaft being suspended on the long, thin through groove, and the thin shaft being slidably placed within the long, thin through groove.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the diameter difference between the thin and thick shafts of the stepped cylindrical head forms a structure that facilitates hanging, allowing the planetary roller hoisting blank to be suspended and accurately positioned within the slender through groove. Furthermore, the thin shaft is slidably placed within the slender through groove, allowing for minute displacements of the planetary roller hoisting blank during heat treatment due to thermal expansion and contraction, thus avoiding bending deformation caused by stress concentration.

[0027] Furthermore, a tooth is provided on the outer circumference of the rough shaft of the stepped cylindrical head, which serves as a circumferential tool setting reference for machining the first and second spur gears.

[0028] The beneficial effect of adopting the above-mentioned further scheme is that the single tooth on the outer circle of the coarse shaft serves as the circumferential tool setting reference, reducing the alignment time during spur gear machining, and ensuring the synchronization accuracy of the phase angle of the two spur gears, thus avoiding interference from planetary motion meshing.

[0029] Furthermore, the diameter of the thick shaft is equal to the diameter of the long cylinder, and the diameter of the thin shaft is equal to the diameter of the short, thin cylinder head.

[0030] Furthermore, the thickness of the lifting plate is less than the length of the thin shaft of the stepped cylindrical head; the diameter of the circular hole of the elongated slot is greater than the maximum diameter of the lifting blank; and the width of the elongated slot satisfies the following conditions: greater than the diameter of the thin shaft of the stepped cylindrical head and less than the diameter of the thick shaft.

[0031] The beneficial effect of adopting the above-mentioned further solution is that the thickness of the lifting plate is less than the length of the thin shaft of the stepped cylindrical head, ensuring that the end of the thin shaft is suspended in the air and does not contact the base, thus avoiding thermal expansion and jamming. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a planetary roller screw pair;

[0034] Figure 2 This is a schematic diagram of the planetary roller structure;

[0035] Figure 3 This is a schematic diagram of the lifting fixture of this utility model;

[0036] Figure 4 This is a schematic diagram of the structure of the base of the hoisting fixture of this utility model;

[0037] Figure 5 This is a structural schematic diagram of the lifting plate of the lifting fixture of this utility model;

[0038] Figure 6 This is a schematic diagram of the structure of the hoisting billet of this utility model;

[0039] Figure 7 This is a schematic diagram of the structure of the present invention, showing the billet being suspended on the hoisting fixture;

[0040] In the diagram, 100 is the lifting fixture; 110 is the base; 111 is the weight reduction hole; 112 is the countersunk hole; 120 is the support frame; 130 is the lifting plate; 131 is the slender through slot; 132 is the round hole; 133 is the semicircle; 134 is the screw hole; and 140 is the pressure plate.

[0041] 200. Lifting billet; 201. First spur gear; 202. Second spur gear; 203. Long cylinder; 204. Short, thin cylindrical head; 205. Thin shaft; 206. Coarse shaft; 207. Gear teeth;

[0042] 300, lead screw pair; 301, planetary roller. Detailed Implementation

[0043] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects described and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).

[0044] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.

[0045] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0046] like Figure 3 - Figure 5 As shown, a lifting fixture for preventing bending deformation of planetary rollers during heat treatment includes a base 110, multiple support frames 120, and a lifting plate 130. The base 110 and the lifting plate 130 are arranged parallel to each other vertically. The multiple support frames 120 are vertically supported between the base 110 and the lifting plate 130. The base 110, support frames 120, and lifting plate 130 together form a hollow lifting container. The lifting plate 130 is provided with an array of elongated slots 131. One end of each elongated slot 131 is a circular hole 132, and the other end is a semicircle 133. The diameter of the circular hole 132 is larger than the width of the elongated slot 131, and the diameter of the semicircle 133 is equal to the width of the elongated slot 131.

[0047] In this embodiment, the support frame 120 is a height-adjustable bolt structure, fixed between the base 110 and the lifting plate 130 by nuts. The adjustable support frame 120 with its bolt structure allows for height adjustment of the lifting plate 130 via nuts, accommodating the suspension requirements of different sized planetary rollers 301 for lifting blanks 200. Simultaneously, it ensures structural stability of the tooling under high-temperature conditions, preventing support failure due to thermal deformation.

[0048] The base 110 is provided with a weight-reducing hole 111 and a countersunk hole 112. The countersunk hole 112 is used to install the bolt structure. The weight-reducing hole 111 of the base 110 can significantly reduce the overall weight of the tooling, making it easier to handle and install. At the same time, the countersunk hole 112 can hide the bolt head, making the bottom surface of the tooling flatter and increasing the stability of the tooling.

[0049] The lifting fixture 100 also includes a pressure plate 140 for preventing the lifting blank 200 from falling off. The pressure plate 140 covers the circular hole 132 and is a detachable structure. The pressure plate 140 covering the circular hole 132 blocks the path of the blank falling off, solving the problem of accidental falling caused by vibration during heat treatment.

[0050] The lifting plate 130 is provided with screw holes 134, and the pressure plate 140 is fixed to the screw holes 134 by screws. Fixing the pressure plate 140 to the lifting plate 130 by screws enables quick installation and removal of the pressure plate 140, which is convenient for operation. At the same time, it ensures the stability of the pressure plate 140 during the heat treatment process and further prevents the lifting blank 200 from falling off.

[0051] The lifting fixture 100 also includes a lifting blank 200, with multiple planetary rollers 301 suspending the blank 200 on the elongated through groove 131. This enables batch heat treatment of the blank 200 suspended by the planetary rollers 301.

[0052] The planetary roller 301 lifting blank 200 includes a first spur gear 201, a second spur gear 202, and a central long cylinder 203, the central long cylinder 203 being used for subsequent grinding of external threads; the first spur gear 201 and the second spur gear 202 are symmetrically arranged on both sides of the long cylinder 203, the tip circle diameter of the first spur gear 201 and the second spur gear 202 is not greater than the diameter of the long cylinder 203; the outer side of the first spur gear 201 is provided with a short, thin cylindrical head 204 for engaging with the inner hole of the planetary carrier; the outer side of the second spur gear 202 is provided with a stepped shaft-shaped cylindrical head, the stepped shaft-shaped cylindrical head including a thin shaft 205 and a thick shaft 206, the thick shaft 206 being suspended on the elongated through groove 131, and the thin shaft 205 being slidably placed within the elongated through groove 131. The diameter difference between the thin shaft 205 and the thick shaft 206 of the stepped cylindrical head forms a structure that facilitates suspension, allowing the planetary roller 301 to easily suspend and accurately position the blank 200 within the elongated slot 131. Furthermore, the thin shaft 205 is slidably positioned within the elongated slot 131, allowing for minor displacement of the blank 200 during heat treatment due to thermal expansion and contraction, thus preventing bending deformation caused by stress concentration.

[0053] The outer circumference of the coarse shaft 206 of the stepped cylindrical head is provided with a tooth 207, which is used as a circumferential tool setting reference for machining the first spur gear 201 and the second spur gear 202. The single tooth 207 on the outer circumference of the coarse shaft 206 serves as a circumferential tool setting reference, reducing the alignment time during spur gear machining and ensuring the synchronization accuracy of the phase angle of the two spur gears, thus avoiding interference from planetary motion meshing.

[0054] The diameter of the thick shaft 206 is equal to the diameter of the long cylinder 203, and the diameter of the thin shaft 205 is equal to the diameter of the short cylindrical head 204. The thickness of the lifting plate 130 is less than the length of the thin shaft 205 of the stepped cylindrical head, ensuring that the end of the thin shaft 205 is suspended and does not contact the base 110, thus avoiding jamming due to thermal expansion. The diameter of the circular hole 132 of the elongated slot 131 is greater than the maximum diameter of the lifting blank 200; the width of the elongated slot 131 satisfies the following condition: greater than the diameter of the thin shaft 205 of the stepped cylindrical head and less than the diameter of the thick shaft 206.

[0055] like Figure 6 As shown, the external dimensions of the hoisting blank 200 can be calculated and determined based on the reserved space for high-end precision equipment such as humanoid robots. The hoisting blank 200 is a slender shaft-like structure that simultaneously possesses a long cylindrical column 203, a spur gear, and a cylindrical head. The middle part is a long cylindrical column 203 with a relatively large diameter to be ground for external threads. The diameter and length of the long cylindrical column 203 meet the load-bearing and space requirements. On both sides of the long cylindrical column 203 are spur gears with equal parameters and the same phase angle. The tip circle of the spur gear is not larger than the diameter of the long cylindrical column 203, and the width of the spur gear is approximately half the tip circle diameter. The clearance between the long cylindrical column 203 and the spur gear is the clearance for the gear and the thread. The outer side of the first spur gear 201 is a short, thin cylindrical head 204, the length of which is slightly less than the width of the spur gear. Its width is approximately the thickness of the planetary carrier, and its diameter is approximately 1 / 3 of the tip circle diameter, fitting with a small clearance in the inner hole of the planetary carrier. The outer side of the second spur gear 202 is a stepped shaft-shaped cylindrical head. The diameter of the thin shaft 205 in the stepped shaft-shaped cylindrical head is equal to that of the opposite short, thin cylindrical head 204, and its length is slightly greater than that of the short, thin cylindrical head 204, providing a margin for cutting off the coarse shaft 206. The coarse shaft 206 is the clamping point of the clamp during the subsequent grinding of the planetary roller 301, and also the lifting part that cooperates with the tooling. Its diameter is equal to the diameter of the external thread to be ground in the middle, and its length is slightly greater than that of the short, thin cylindrical head 204 to ensure the clamping is firm. A tooth 207 is provided on the outer circle of the coarse shaft 206, which is the starting point for circumferential tool setting when machining the spur gears on both sides.

[0056] According to the process route, the hoisting blanks 200 of the planetary rollers 301 are batch-processed into the above structure for use in quenching-tempering heat treatment.

[0057] In this embodiment, the lifting fixture 100 is made of high-temperature resistant stainless steel to avoid significant deformation during quenching and tempering heat treatment. Six support through holes are provided at the four corners and the middle of the long side of the support plate to accommodate six support brackets 120. The middle portion of the support plate is an array of elongated through slots 131 with a circular hole 132 at one end. The diameter of the circular hole 132 is significantly larger than the width of the through slot; the diameter of the circular hole 132 is also larger than the diameter of all parts of the planetary roller 301, so that the planetary roller 301 can be inserted downwards from above the circular hole 132. The width of the elongated slot 131 is slightly larger than the diameter of the thin shaft 205 of the stepped cylindrical head, but smaller than the diameter of the thick shaft 206 of the stepped cylindrical head, so that the thick shaft 206 of the stepped cylindrical head can be hung in the elongated slot 131. The length of the elongated slot 131 is adapted to the width of the support plate, and the length of the elongated slot 131 can be extended to almost equal to the width of the support plate to increase the number of loads. The small end of the elongated slot 131 is a semicircle 133 with a diameter equal to the width of the elongated slot 131, so as to increase the possible contact area between the load blank and the elongated slot 131 and reduce the contact stress. When the support plate is deformed by heat, the width of the slot is slightly larger than the diameter of the thin shaft 205 of the stepped cylindrical head, which prevents deformation and jamming during the hoisting of the planetary roller 301. The thickness of the support plate is slightly smaller than the length of the thin shaft 205 of the stepped cylindrical head to ensure the rigidity of the support plate.

[0058] The non-stepped cylindrical head section of the planetary roller 301 lifting blank 200 is inserted into the circular hole 132. When the thin shaft 205 of the stepped cylindrical head enters the hole, the planetary roller 301 slides into the elongated through groove 131 to lift the blank 200, causing the thick shaft 206 of the stepped cylindrical head to hang on the through groove, thus lifting the planetary roller 301 lifting blank 200. Figure 7 As shown. Repeating the above process fills the array of slender through slots 131 in the support plate. Screw holes 134 are provided on both sides of the circular hole 132 in the support plate. To prevent the planetary rollers 301 from lifting the blank 200 from falling out of the circular hole 132 in the slender through slots 131, a pressure plate 140 with two connecting through holes is installed on the circular hole 132, and its sides are fastened to the screw holes 134 in the support plate with screws. After heat treatment, the pressure plate 140 can be removed, and the opposite side of the circular hole 132 of the fixture can be lifted to tilt the fixture. The planetary rollers 301 then lift the blank 200 and slide it out of the circular hole 132 for easy unloading.

[0059] The method for lifting the blank 200 using the lifting fixture 100 of this utility model to prevent the planetary rollers 301 from bending and deforming during heat treatment is as follows:

[0060] Assemble the designed lifting fixture 100 completely, ensuring all components are installed in place and securely. Then, lift the planetary rollers 301 lifting blanks 200 to be heat-treated one by one onto the elongated slots 131 of the lifting plate 130 as described above. During the lifting process, carefully adjust the position of each planetary roller 301 lifting blank 200 to ensure even distribution on the lifting plate 130, avoiding mutual compression or misalignment, and fix the pressure plate 140 above the circular hole 132.

[0061] After hoisting, the entire hoisting fixture 100 is sent into a heat treatment furnace for quenching and tempering heat treatment. During the heat treatment process, because the hoisting fixture 100 is made of high-temperature resistant stainless steel, it can effectively resist deformation under high-temperature conditions, ensuring the heat treatment quality of the planetary roller 301 hoisting blank 200.

[0062] After heat treatment, once the tooling has cooled to room temperature, the pressure plate 140 is removed, and the planetary rollers 301 lift the blank 200 and slide it out of the circular hole 132 by tilting the tooling, thus completing the unloading. At this point, the planetary rollers 301 lift the blank 200, after heat treatment, have improved hardness and wear resistance. Furthermore, due to the design of the lifting tooling 100, bending deformation caused by stress concentration during heat treatment is effectively avoided.

[0063] In summary, the lifting fixture 100 of this invention for preventing bending deformation of the planetary rollers 301 during heat treatment enables batch heat treatment of the planetary rollers 301 on the blank 200, effectively avoiding bending deformation during the heat treatment process. This ensures the overall straightness and coaxiality of the planetary rollers 301 in subsequent processing, improving product quality and production efficiency. Furthermore, the method of this invention allows for the miniaturization of the planetary rollers 301, making the standard and reverse planetary roller screw pairs 300 more compact, better serving compact applications such as humanoid robots.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lifting tool for preventing heat treatment bending deformation of a planetary roller, characterized by, The container includes a base (110), multiple support frames (120), and a lifting plate (130). The base (110) and the lifting plate (130) are arranged parallel to each other vertically. The multiple support frames (120) are vertically supported between the base (110) and the lifting plate (130). The base (110), support frames (120), and lifting plate (130) together form a hollow lifting container. The lifting plate (130) is provided with an array of elongated through slots (131). One end of the elongated through slot (131) is a round hole (132), and the other end of the elongated through slot (131) is a semicircle (133). The diameter of the round hole (132) is greater than the width of the elongated through slot (131), and the diameter of the semicircle (133) is equal to the width of the elongated through slot (131).

2. The lifting tool for preventing heat treatment bending deformation of a planetary roller according to claim 1, wherein The support frame (120) is a height-adjustable bolt structure, which is fixed between the base (110) and the lifting plate (130) by nuts.

3. The lifting tool for preventing heat treatment bending deformation of a planetary roller according to claim 2, wherein The base (110) is provided with a weight reduction hole (111) and a countersunk hole (112), the countersunk hole (112) being used to install the bolt structure.

4. The lifting tool for preventing heat treatment bending deformation of a planetary roller according to claim 3, wherein It also includes a pressure plate (140) for preventing the hoisted billet (200) from falling off, the pressure plate (140) covering the circular hole (132), and the pressure plate (140) is a detachable structure.

5. The lifting tool for preventing heat treatment bending deformation of a planetary roller according to claim 4, wherein The lifting plate (130) is provided with screw holes (134), and the pressure plate (140) is fixed to the screw holes (134) by screws.

6. The lifting tool according to any one of claims 1 to 5, wherein It also includes planetary rollers (301) for lifting blanks (200), and multiple planetary rollers (301) for lifting blanks (200) are suspended on the elongated through groove (131).

7. The lifting tool according to claim 6, wherein The planetary roller (301) lifting blank (200) includes a first spur gear (201), a second spur gear (202), and a middle long cylinder (203). The middle long cylinder (203) is used for subsequent grinding of external threads. The first spur gear (201) and the second spur gear (202) are symmetrically arranged on both sides of the long cylinder (203). The tooth tip circle diameter of the first spur gear (201) and the second spur gear (202) is not greater than the diameter of the long cylinder (203). The outer side of the first spur gear (201) is provided with a short cylindrical head (204) for cooperating with the inner hole of the planetary carrier. The outer side of the second spur gear (202) is provided with a stepped shaft-shaped cylindrical head. The stepped shaft-shaped cylindrical head includes a thin shaft (205) and a thick shaft (206). The thick shaft (206) is suspended on the long through groove (131), and the thin shaft (205) is slidably placed in the long through groove (131).

8. The lifting tool according to claim 7, wherein The outer circle of the coarse shaft (206) of the stepped cylindrical head is provided with a tooth (207) for use as a circumferential tool setting reference for machining the first spur gear (201) and the second spur gear (202).

9. The lifting tool according to claim 8, wherein The diameter of the thick shaft (206) is equal to the diameter of the long cylinder (203), and the diameter of the thin shaft (205) is equal to the diameter of the short cylindrical head (204).

10. The lifting tool for preventing heat treatment bending deformation of a planetary roller according to claim 9, wherein The thickness of the lifting plate (130) is less than the length of the thin shaft (205) of the stepped cylindrical head; the diameter of the round hole (132) of the elongated slot (131) is greater than the maximum diameter of the lifting blank (200); the width of the elongated slot (131) is greater than the diameter of the thin shaft (205) of the stepped cylindrical head and less than the diameter of the thick shaft (206).

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