Planetary gear set press-fitting device and press-fitting method

Abstract

The invention relates to the technical field of gear press-fitting of gearboxes, in particular to a press-fitting device and a press-fitting method for a planetary gear set. The press-fitting device comprises an upper press-fitting mechanism; the upper press-fitting mechanism comprises a clamping mechanism used for clamping the planetary gear set, a first telescopic mechanism used for driving the clamping mechanism to ascend and descend, a second telescopic mechanism used for driving the first telescopic mechanism to ascend and descend and a stroke sensor used for detecting the actual downward pressing distance of the planetary gear set to judge whether the gear ring is pressed in or not. The telescopic end of the second telescopic mechanism abuts against the planetary gear set. And the lower press-fitting mechanism comprises a fixing base used for fixing the gear ring, a third telescopic mechanism with the telescopic end penetrating through the gear ring and a guide disc which is arranged on the third telescopic mechanism and can penetrate through the gear ring, and the guide disc is used for bearing the planetary gear set and is matched with the second telescopic mechanism to press the planetary gear set into the gear ring. During press fitting, whether press fitting is in place or not can be judged by measuring the actual press-down distance through the stroke sensor, overall use is convenient, and efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gear press-fitting of a transmission, and specifically refers to a planetary gear set press-fitting device and a press-fitting method. Background Art

[0002] At present, in order to provide multiple gears to meet different driving requirements, a transmission often uses a sun gear to mesh with multiple planet gears. The multiple planet gears are respectively rotatably arranged on the pin shafts of a planet carrier to form a planetary gear set, and the outer circumferential sides of the multiple planet gears of the planetary gear set mesh with the same ring gear. In a conventional production line, the process of meshing the multiple planet gears of the planetary gear set with the ring gear is all manually assembled, resulting in low production efficiency, a risk of knocking the convex teeth, and consuming a lot of labor. Summary of the Invention

[0003] The main object of the present invention is to solve the deficiencies of the above background art, and provide a planetary gear set press-fitting device and a press-fitting method.

[0004] The technical solution adopted by the present invention is: A planetary gear set press-fitting device, the device includes, An upper press-fitting mechanism, the upper press-fitting mechanism includes a clamping mechanism for clamping the planetary gear set, a first telescopic mechanism for driving the clamping mechanism to lift, a second telescopic mechanism for driving the first telescopic mechanism to lift, and a travel sensor for detecting the actual downward pressing distance of the planetary gear set to determine whether it is pressed into the ring gear; the telescopic end of the second telescopic mechanism abuts against the planetary gear set; the planetary gear set includes a planet carrier, a plurality of planet gears arranged on the planet carrier, and a sun gear meshing with the plurality of planet gears; A lower press-fitting mechanism, the lower press-fitting mechanism includes a fixed base for fixing the ring gear, a third telescopic mechanism whose telescopic end penetrates through the ring gear, and a guiding disc arranged on the third telescopic mechanism and capable of passing through the ring gear. The guiding disc is used to receive the planetary gear set and cooperate with the second telescopic mechanism to press-fit the planetary gear set into the ring gear.

[0005] According to a planetary gear set press-fitting device provided by the present invention, a pressing head for abutting against the planetary gear set is provided at the telescopic end of the second telescopic mechanism, and is used to press-fit the planetary gear set into the ring gear in cooperation with the guiding disc of the third telescopic mechanism after the clamping mechanism is opened and lifted.

[0006] According to a planetary gear set press-fitting device provided by the present invention, a travel rod is provided at the telescopic end of the first telescopic mechanism, and the travel rod slides into the travel sensor; the travel sensor measures the actual downward pressing distance of the planetary gear set according to the displacement of the travel rod, and the actual downward pressing distance is used to compare with the preset downward pressing distance for pressing the planetary gear set into the ring gear to determine whether the planetary gear set is pressed into the ring gear.

[0007] According to a planetary gear set pressing device provided by the present invention, an installation plate is provided at the telescopic end of the second telescopic mechanism; the pressing head includes a plurality of pressing columns spaced on the installation plate and correspondingly abutting against the end face of the planetary gear; a first avoidance hole is penetrated through the installation plate, and the clamping mechanism vertically slides through the first avoidance hole.

[0008] According to a planetary gear set pressing device provided by the present invention, the ring gear is fixedly arranged on the housing, the housing is fixed on the fixed base in a set orientation, the top of the housing is open, and a second avoidance hole for the guide plate to pass through is provided at the bottom.

[0009] According to a planetary gear set pressing device provided by the present invention, it further includes a servo turntable located below the upper pressing mechanism when pressing the sun gear and the planetary gear to form the planetary gear set. The servo turntable is used to install and rotate a planetary carrier provided with a plurality of planetary gears; a fixing member for installing the sun gear is slidably arranged at the telescopic end of the second telescopic mechanism, and an elastic member is arranged between the second telescopic mechanism and the fixing member; an inductor is fixedly arranged at the telescopic end of the second telescopic mechanism; a sensed member is provided on the fixing member corresponding to the inductor; the fixing member slides relative to the inductor when the end face of the sun gear abuts against the end face of the planetary gear, and the sensed member is located outside the sensing range of the inductor after sliding relative to the inductor following the fixing member.

[0010] According to a planetary gear set pressing device provided by the present invention, when the end face of the sun gear abuts against the end face of the planetary gear, the servo turntable drives the planetary carrier to rotate so that the planetary gear rotates under the abutting force of the end face of the sun gear to an angle suitable for being pressed into the sun gear; after the sun gear is pressed into the planetary gear, the servo turntable rotates a set angle so that the convex teeth of the planetary gear are suitable for engaging with the ring gear with a fixed angle.

[0011] According to a planetary gear set pressing device provided by the present invention, a first telescopic mechanism, the inductor and a connecting sleeve located on one side of the inductor are fixedly arranged at the telescopic end of the second telescopic mechanism, one end of the fixing member is slidably arranged in the connecting sleeve, and both ends of the elastic member act on the connecting sleeve and the fixing member to abut against the fixing member and flexibly press the sun gear; the clamping mechanism is provided at the telescopic end of the first telescopic mechanism.

[0012] On the other hand, the present invention further provides a pressing method for a planetary gear set. Using a planetary gear set pressing device provided by the present invention, the pressing method includes, Install the planetary gear set at the telescopic end of the second telescopic mechanism at a first set circumferential angle, and the clamping mechanism clamps and fixes the planetary gear set; After moving the planetary gear set downward to abut against the guide plate, open and move the clamping mechanism upward relative to the planetary gear set; The second telescopic mechanism and the third telescopic mechanism move synchronously to press the planetary gear set on the ring gear; According to the actual pressing distance measured by the comparison travel sensor and the preset pressing distance for pressing the planetary gear set into the ring gear, it is determined whether the planetary gear set is pressed into the ring gear.

[0013] A pressing method for a planetary gear set according to the present invention further includes, Using the upper pressing mechanism and the servo turntable to press the sun gear onto a plurality of planet gears connected to the planet carrier to form the planetary gear assembly; Position the upper pressing mechanism corresponding to above the lower pressing mechanism.

[0014] A pressing method for a planetary gear set according to the present invention, wherein using the upper pressing mechanism and the servo turntable to press the sun gear onto a plurality of planet gears connected to the planet carrier to form the planetary gear assembly includes, Mount the sun gear on a fixing member to fix it circumferentially; After the planet carrier equipped with planet gears is positioned and installed on the servo turntable, the second telescopic mechanism extends and moves down the fixing member; When the end face of the sun gear abuts against the end faces of a plurality of planet gears, rotate the planet carrier so that the planet gears rotate self - rotatably under the abutting force of the sun gear and are flexibly pressed into the sun gear; Rotate the planetary gear set by a set angle so that the convex teeth of the planet gears are suitable for meshing and pressing into the ring gear; The clamping mechanism clamps the planetary gear set after the planetary gear set rotates by a set angle.

[0015] The beneficial effects of the present invention include: 1. The clamping mechanism can clamp the planet carrier to clamp and fix the planetary gear set at the telescopic end of the second telescopic mechanism, and the ring gear is fixed by the fixed base below. During pressing, the second telescopic mechanism presses down the planetary gear set. After the guiding disc receives the planetary gear set, the first telescopic mechanism can drive the opened clamping mechanism to move upward to avoid interference between the clamping mechanism and the ring gear during pressing; the second telescopic mechanism and the third telescopic mechanism abut against both sides of the planetary gear set and synchronously move down the planetary gear set to press it into the meshing ring gear. By detecting the pressing distance of the planetary gear set with the travel sensor, it can be determined whether the planetary gear set enters the ring gear; The pressing head of the second telescopic mechanism can be used to abut against and press down the planetary gear set. After the planetary gear set is placed on the guiding disc, the first telescopic mechanism can drive the clamping mechanism to move upward to avoid interference with the ring gear; The travel rod is relatively fixed to the planetary gear set at the telescopic end of the first telescopic mechanism and slides to transmit to the travel sensor. During pressing, the travel sensor detects the moving amount of the travel rod, which is the actual pressing distance. By comparing the actual pressing distance and the preset pressing distance, it can be determined whether the planetary gear set is pressed into the ring gear; after not being pressed into the ring gear once, the planetary gear set can be moved upward and then pressed in a second time; Multiple pressure columns can abut against the end face of the planet gear to prevent tilting when being pressed into the ring gear. The mounting plate facilitates the arrangement of multiple pressure columns and avoidance holes, enabling the clamping mechanism to slide through the first avoidance hole and then clamp the planet carrier. The ring gear is fixed to the housing, which is convenient for installation on the fixed base in a set orientation and is applicable to components where the ring gear and the housing are integrally formed. The top and bottom openings of the housing facilitate the withdrawal of the guiding plate and the pressing of the planetary gear set. The servo turntable can cooperate with the upper pressing mechanism to press the sun gear between multiple planet gears to form a planetary gear set. The sun gear is circumferentially fixed by a fixing member. When pressing down, the servo turntable rotates when the end face of the sun gear abuts against the end face of the planet gear, driving the planet gear to revolve and rotate until it reaches an appropriate angle to press in the sun gear. The fixing member is slidably arranged at the telescopic end of the second telescopic mechanism, and the elastic member can prevent rigid collision between the sun gear and the planet gear, resulting in damage. The inductor can sense the sensed part to determine whether the sun gear is pressed in place. After the sun gear is pressed in place, the servo turntable is also used to drive the planetary gear set to rotate a set angle to make it suitable for meshing with the ring gear. The inductor is arranged at the telescopic end of the second telescopic mechanism and moves up and down accordingly. One end of the fixing member is slidably sleeved on the connecting sleeve. After the sun gear abuts against the end face of the planet gear, the fixing member compresses the elastic member and moves upward relative to the inductor. After the sensed part moves upward, the sensing state of the inductor changes, which can determine whether the sun gear is pressed in place. And through the elastic member, the sun gear can be flexibly pressed in when the circumferential angle of the convex teeth of the planet gear is appropriate. The pressing method of the present invention makes full use of the structural characteristics of the pressing device provided by the present invention. The planetary gear set can be clamped and fixed at the telescopic end of the second telescopic mechanism at a set circumferential angle by the clamping mechanism. After the second telescopic mechanism extends and moves downward and the planetary gear set abuts against the guiding plate, the clamping mechanism opens and moves upward through the first telescopic mechanism to avoid interference between the clamping mechanism and the ring gear. The second telescopic mechanism and the third telescopic mechanism move synchronously to press the planetary gear set onto the ring gear, and it can be determined whether the planetary gear set is pressed in place by comparing the actual pressing distance with the preset pressing distance. The pressing method of the present invention can also press the sun gear between multiple planet gears by the cooperation of the servo turntable and the upper pressing mechanism. After the sun gear is pressed, it rotates a set angle to make the convex tooth angle of the planet gear suitable for pressing on the fixed ring gear, which can achieve full-automatic pressing and improve production efficiency.

[0016] The present invention can clamp and fix the planetary gear set at a set angle at the telescopic end of the second telescopic mechanism through a clamping mechanism. After the second telescopic mechanism presses down the planetary gear set so that the guide plate receives the planetary gear set, the clamping mechanism opens and is driven to move upward by the first telescopic mechanism to avoid interference between the clamping mechanism and the gear ring when pressing in. The second telescopic mechanism and the third telescopic mechanism abut against both sides of the planetary gear set and synchronously move the planetary gear set downward to press the meshing gear ring. The travel sensor detects the pressed distance of the planetary gear set to determine whether the planetary gear set is in the ring, thereby realizing machine pressing and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : A schematic diagram of the structure of the upper pressing mechanism of the present invention when used in conjunction with the lower pressing mechanism; Figure 2 : Structural diagram of the downward pressing mechanism; Figure 3 : Schematic diagram of the structure when the upper pressing mechanism is used in conjunction with the servo turntable; Figure 4 : Schematic diagram of the three-dimensional structure of the upper pressing mechanism; Figure 5 : A schematic cross-sectional view of a fixing member that is slidably arranged on the second telescopic mechanism; Figure 6 : Schematic diagram of the three-dimensional structure of the servo turntable; Figure 7 : Schematic diagram of the cross-sectional structure of the servo turntable; Among them: 1—clamping mechanism; 2—first telescopic mechanism; 3—second telescopic mechanism; 31—mounting plate; 311—first avoidance hole; 32—pressure column; 33—connecting sleeve; 34—fixing part; 35—elastic component; 36—sensed part; 37—sensor; 4—travel sensor; 41—travel rod; 5—planetary gear set; 51—sun gear; 52—planet carrier; 53—planetary gear; 6—downward pressing mechanism; 61—fixed base; 62—third telescopic mechanism; 621—guide plate; 7—housing; 71—gear ring; 8—servo turntable; 81—servo motor; 82—positioning turntable; 821—positioning hole; 83—transmission plate. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and the accompanying drawings are not drawn to scale and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0021] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0022] A plurality of planet gears 53 are positioned and installed on the pin shafts of the planet carrier 52. The central axes of the planet gears 53 and the sun gear 51 are both fixed. It is necessary for the convex tooth angles of the plurality of planet gears 53 to be appropriate in order to mesh and install the sun gear 51. The outer sides of the plurality of planet gears 53 mesh with the internal gear ring 71. In some scenarios, the internal gear ring 71 is fixed on the housing 7 and its convex tooth angle is fixed. After the sun gear 51 is press-fitted and meshed with the plurality of planet gears 53 to form the planetary gear set 5, the planetary gear set 5 still needs to be press-fitted into the internal gear ring 71, that is, the planet gears 53 are meshed on the same internal gear ring 71.

[0023] The present invention relates to a press-fitting device for a planetary gear set 5, which is used to press-fit the planetary gear set 5 onto the internal gear ring 71. After adjusting the circumferential angle of the planetary gear set 5, the clamping mechanism 1 can clamp the planet carrier 52 to clamp and fix the planetary gear set 5 at the telescopic end of the second telescopic mechanism 3. The internal gear ring 71 is fixed by the fixed base 61 below. During press-fitting, the second telescopic mechanism 3 presses down the planetary gear set 5. After the guiding disc 621 receives the planetary gear set 5, the first telescopic mechanism 2 can drive the opened clamping mechanism 1 to move upward to avoid interference between the clamping mechanism 1 and the internal gear ring 71 during pressing-in; the second telescopic mechanism 3 and the third telescopic mechanism 62 abut against both sides of the planetary gear set 5 and synchronously move the planetary gear set 5 downward to press-fit and mesh it with the internal gear ring 71. The downward pressing distance of the planetary gear set 5 is detected by the stroke sensor 4 to determine whether the planetary gear set 5 has entered the ring, and it can cooperate with the control system to achieve automatic press-fitting and improve production efficiency.

[0024] A press-fitting device for a planetary gear set 5. Specifically, as Figure 1As shown, it includes an upper pressing mechanism and a lower pressing mechanism 6; the upper pressing mechanism includes a clamping mechanism 1 for clamping the planetary gear set 5, a first telescopic mechanism 2 for driving the clamping mechanism 1 to move up and down, a second telescopic mechanism 3 for driving the first telescopic mechanism 2 to move up and down, and a travel sensor 4 for detecting the actual downward pressing distance of the planetary gear set 5 to determine whether it is pressed into the ring gear 71; the telescopic end of the second telescopic mechanism 3 abuts against the planetary gear set 5 for pressing down the planetary gear set 5; the planetary gear set 5 includes a planet carrier 52, a plurality of planet gears 53 provided on the planet carrier 52, and a sun gear 51 meshing with the plurality of planet gears 53; the lower pressing mechanism 6 includes a fixed base 61 for fixing the ring gear 71 at a set angle below the clamping mechanism 1 when pressing the planetary gear set 5, a third telescopic mechanism 62 whose telescopic end penetrates through the ring gear 71, and a guiding disk 621 provided on the third telescopic mechanism 62 and capable of passing through the ring gear 71. The guiding disk 621 is used to receive the planetary gear set 5 and cooperate with the second telescopic mechanism 3 to press the planetary gear set 5 into the ring gear 71.

[0025] During pressing, after the second telescopic mechanism 3 extends to make the planetary gear set 5 move down and abut against the guiding disk 621, the clamping mechanism 1 opens, the first telescopic mechanism 2 contracts to drive the clamping mechanism 1 to move up relative to the planetary gear set 5, and the second telescopic mechanism 3 continues to extend and cooperate with the third telescopic mechanism 62 to contract to press the planetary gear set 5 into the ring gear 71.

[0026] In a further embodiment, as Figure 1 and Figure 4 shown, the telescopic end of the second telescopic mechanism 3 is provided with a pressing head abutting against the planetary gear set 5, which is used to cooperate with the guiding disk 621 of the third telescopic mechanism 62 to press the planetary gear set 5 into the ring gear 71 after the clamping mechanism 1 opens and moves up.

[0027] In a certain embodiment, the method of the travel sensor 4 measuring the actual downward movement distance is described. As Figure 1 and Figure 4 shown, the telescopic end of the first telescopic mechanism 2 is provided with a travel rod 41, and the travel rod 41 slides into the travel sensor 4; the travel sensor 4 measures the actual downward pressing distance of the planetary gear set 5 according to the displacement of the travel rod 41. The actual downward pressing distance is used to compare with the preset downward pressing distance for the planetary gear set 5 to be pressed into the ring gear 71 to determine whether the planetary gear set 5 is pressed into the ring gear 71. The travel rod 41 is provided at the telescopic end of the first telescopic mechanism 2 and is relatively fixed to the planetary gear set 5, and slides and transmits to the travel sensor 4. During downward pressing, the travel sensor 4 detects the movement amount of the travel rod 41, that is, the actual downward pressing distance. By comparing the actual downward pressing distance with the preset downward pressing distance, it can be determined whether the planetary gear set 5 is pressed into the ring gear 71; after failing to be pressed into the ring gear 71 once, the planetary gear 53 set can be moved up and then pressed in for the second time.

[0028] In a certain embodiment, as Figure 1As shown, the telescopic end of the second telescopic mechanism 3 is provided with a mounting plate 31; the pressure head includes a plurality of pressure columns 32 which are spaced apart on the mounting plate 31 and correspond to the end faces of the planetary gear 53 abutting against each other; a first avoidance hole 311 is penetrated through the mounting plate 31, and the clamping mechanism 1 vertically slides through the first avoidance hole 311; the fixed end (opposite to the telescopic end) of the first telescopic mechanism 2 is provided on the mounting plate 31, and the telescopic end is connected to the clamping mechanism 1, and after the planetary gear set 5 moves down and abuts against the guide plate 621, the clamping mechanism 1 is opened, and the first telescopic mechanism 2 contracts to drive the clamping mechanism 1 to slide upward in the first avoidance hole 311, so as to avoid interference between the clamping mechanism 1 and the gear ring 71 during press-fitting.

[0029] In one embodiment, if Figure 1-2 As shown, the ring gear 71 is fixed on the shell 7, and the shell 7 is fixed on the fixed base 61 according to the set orientation. The top of the shell 7 is open, and the bottom is provided with a second avoidance hole through which the guide plate 621 passes; the third telescopic mechanism 62 is arranged on the fixed base 61 and is located below the shell 7. The ring gear 71 can be easily fixed through the shell 7 to ensure the consistency of the orientation of the ring gear 71 during each press-fitting. It is suitable for a planetary gear box in which the ring gear 71 and the shell 7 are integrally formed.

[0030] In certain embodiments, such as Figure 3 As shown, the pressing device of the present invention also includes a servo turntable 8, which is located below the upper pressing mechanism when the sun gear 51 and the planetary gears 53 are pressed to form the planetary gear set 5, and the servo turntable 8 is used to install and rotate the planetary carrier 52 provided with multiple planetary gears 53; the telescopic end of the second telescopic mechanism 3 is slidably provided with a fixing part 34 for installing the sun gear 51, and an elastic part 35 is provided between the fixing part 34; the telescopic end of the second telescopic mechanism 3 is fixedly provided with a sensor 37; the fixing part 34 is provided with a sensed part 36 corresponding to the sensor 37, and before the sun gear 51 is pressed, the sensor 37 can sense the sensed part 36; when the second telescopic mechanism 3 is extended, the fixing part 34 slides and compresses the elastic part 35 relative to the sensor 37 when the end face of the sun gear 51 abuts against the end face of the planetary gear 53, and the sensed part 36 is located outside the sensing range of the sensor 37 after following the fixing part 34 to slide relative to the sensor 37.

[0031] In a further embodiment, the servo turntable 8 is described as follows: Figure 6-7 As shown, the servo turntable 8 includes a servo motor 81 and a positioning turntable 82 which is transmission-connected to the output end of the servo motor 81. The positioning turntable 82 is provided with a positioning hole 821 for plugging in the output shaft of the planetary carrier 52. The servo motor 81 drives the positioning turntable 82 to rotate, thereby driving the planetary carrier 52 to rotate. The servo motor 81 can drive the positioning turntable 82 to rotate through the transmission disk 83.

[0032] In a further embodiment, the sun gear 51 is press-fitted over the fixing member 34, and the frictional force between the two circumferentially fixes the sun gear 51; when the servo turntable 8 abuts against the end face of the planet gear 53 at the end face of the sun gear 51, it drives the planet carrier 52 to rotate, so that the planet gear 53 rotates self-driven under the abutting force at the end face of the sun gear 51 to an angle suitable for press-fitting into the sun gear 51; after multiple planet gears 53 rotate self-driven, an angle will be found to be suitable for press-fitting into the sun gear 51; in order to make the press-fitted planetary gear set 5 suitable for press-fitting on the ring gear 71, the servo turntable 8 rotates a set angle (this set angle is measured through experiments and is used when press-fitting the planetary gear set 5 subsequently) after the sun gear 51 is press-fitted between the planet gears 53, so that the convex tooth angle of the planet gear 53 is suitable for meshing with the fixed ring gear 71 (in the first set circumferential angle state); then, the clamping mechanism 1 clamps and fixes the planetary gear set 5, the servo platform is used to move the upper press-fitting mechanism so that the upper press-fitting mechanism is correspondingly located above the lower press-fitting mechanism 6, and then the planetary gear set 5 (planet gear 53) is press-fitted and meshed on the ring gear 71, and the second telescopic mechanism 3 drives the sun gear 51 to rise again, and continues to press-fit the next set of planet gears 53 on the next set of ring gears 71. The same sun gear 51 is used throughout the press-fitting process.

[0033] In a specific embodiment, the way in which the fixing member 34 is slidably connected to the second telescopic mechanism 3 is illustrated, as Figure 5 shown, a first telescopic mechanism 2, a sensor 37 and a connecting sleeve 33 located on one side of the sensor 37 are fixedly provided at the telescopic end of the second telescopic mechanism 3. One end of the fixing member 34 is slidably disposed in the connecting sleeve 33, and the other end is used for circumferentially fixedly installing the sun gear 51; both ends of the elastic member 35 act on the connecting sleeve 33 and the fixing member 34 to abut against the fixing member 34 and flexibly press-fit the sun gear 51; the telescopic end of the first telescopic mechanism 2 is provided with a clamping mechanism 1; the clamping plates of the clamping mechanism 1 are located on both sides of the fixing member 34. Preferably, a spring is used as the elastic member 35, and the spring is disposed in the connecting sleeve 33, and its top and bottom ends respectively abut against the connecting sleeve 33 and the fixing member 34.

[0034] In another embodiment, the sun gear 51 is installed on the fixing member 34 at a second set circumferential angle, so that after the planet gear 53 meshes with the sun gear 51, it can directly or after the planet gear 53 revolves a set angle, it is adapted to mesh with the ring gear 71. In this way, after each press-fitting of the planetary gear set 5 above the ring gear 71, there is no need to raise the sun gear 51 and take it out between the planet gears 53, saving a subsequent process of press-fitting the sun gear 51 between the planet gears 53 that mesh with the ring gear 71.

[0035] The first telescopic mechanism 2, the second telescopic mechanism 3, and the third telescopic mechanism 62 can all adopt telescopic cylinders, such as hydraulic cylinders and pneumatic cylinders.

[0036] During actual use, the telescopic end of the second telescopic mechanism 3 fixedly installs the mounting plate 31. A connecting sleeve 33 is fixedly installed on the mounting plate 31. The fixing member 34 is columnar, and its top end is slidably sleeved in the connecting sleeve 33. A spring is arranged in the connecting sleeve 33 and abuts against the fixing member 34 and the connecting sleeve 33 at both ends respectively. The inductor 37 is arranged on the mounting plate 31 and is located on one side of the member to be sensed 36. The fixed end of the first telescopic mechanism 2 is arranged on the top surface of the mounting plate 31, and the telescopic end is fixedly connected to the clamping mechanism 1. The clamping plate slides through the first avoidance hole 311 of the mounting plate 31; the mounting plate 31 is fixedly connected to the travel rod 41 passing through the travel sensor 4, and the travel sensor 4 is fixedly arranged; when pressing the sun gear 51, the servo turntable 8 is located under the upper pressing mechanism. After the pressing is completed to form the planetary gear set 5, the servo turntable 8 rotates by a set angle to make the convex teeth of the planet gear 53 suitable for the meshing angle of the fixed ring gear 71. The clamping mechanism 1 clamps and fixes the planetary gear set 5 with the adjusted angle; then the lower pressing mechanism 6 is located under the upper pressing mechanism to press the planetary gear set 5 onto the ring gear 71. The upper pressing mechanism can be moved by the servo platform to correspond to the servo turntable 8 and the lower pressing mechanism 6 respectively, and two pressing processes are completed.

[0037] On the other hand, the present invention also provides a pressing method for the planetary gear set 5. Using the pressing device for the planetary gear set 5 of the present invention, the pressing method includes: S1. Install the planetary gear set 5 at the telescopic end of the second telescopic mechanism 3 according to the first set circumferential angle, and use the clamping mechanism 1 to clamp and fix the planetary gear set 5; S2. Move the planetary gear set 5 downward until it abuts against the guide plate 621, and then open and move the clamping mechanism 1 upward relative to the planetary gear set 5; S3. The second telescopic mechanism 3 and the third telescopic mechanism 62 move synchronously to press the planetary gear set 5 onto the ring gear 71; S4. According to the comparison between the actual downward pressing distance measured by the travel sensor 4 and the preset downward pressing distance for pressing the planetary gear set 5 into the ring gear 71, determine whether the planetary gear set 5 is pressed into the ring gear 71.

[0038] According to the present invention, a pressing method for the planetary gear set 5 further includes S100. Use the upper pressing mechanism and the servo turntable 8 to press the sun gear 51 onto the multiple planet gears 53 connecting the planet carrier 52 to form the planetary gear set 5; that is, the present invention includes two pressing processes. The first pressing process is to press the sun gear 51 between the planet gears 53 to form the planetary gear set 5, and the second pressing process is to press the planetary gear set 5 onto the ring gear 71; S200. Position the upper press-fitting mechanism directly above the lower press-fitting mechanism 6. Then, press-fit and engage the planetary gear set 5 onto the ring gear 71. The upper press-fitting mechanism can be arranged on the servo platform. After pressing the sun gear 51 between multiple planet gears 53 to form the planetary gear set 5, use the servo platform to adjust the position of the upper press-fitting mechanism to be directly above the lower press-fitting mechanism 6. The upper press-fitting mechanism can be translated or rotated. Finally, press-fit the planetary gear set 5 at the first set circumferential angle state and continue the press-fitting process.

[0039] According to the present invention, a method for press-fitting a planetary gear set 5 is provided. In the above S100 step, the upper press-fitting mechanism and the servo turntable 8 are used to press-fit the sun gear 51 onto multiple planet gears 53 connected to the planet carrier 52 to form the planetary gear set 5, including: S101. Mount the sun gear 51 on the fixing member 34 to fix its circumferential direction. S102. After positioning and installing the planet carrier 52 with the planet gears 53 on the servo turntable 8, the second telescopic mechanism 3 extends downward to fix the fixing member 34. In most cases, the sun gear 51 cannot directly press down and engage multiple planet gears 53, and it is necessary to adjust the convex tooth angles of the multiple planet gears 53. During the downward pressing process, the bottom surface of the sun gear 51 will abut against the top surface of the planet gear 53. When continuing to press down, the sensor 37 follows the relative movement of the fixing member 34 with respect to the sensor 37, causing a change in the sensing state of the sensor 37, and it is determined that the sun gear 51 has not been pressed into between the planet gears 53. S103. When the end face of the sun gear 51 abuts against the end faces of multiple planet gears 53, rotate the planet carrier 52 so that the planet gears 53 rotate self-rotationally under the abutting force of the sun gear 51 until they are flexibly press-fitted into the sun gear 51. By rotating the planet carrier 52 through the servo turntable 8 to drive the planet gears 53 to revolve and rotate self-rotationally, they will rotate to the angle of engaging the sun gear 51. Under the elastic force of the elastic member 35, the sun gear 51 is flexibly pressed downward to engage multiple planet gears 53 to form the planetary gear set 5. At this time, the sensing member 36 follows the sliding of the fixing member 34 and is located on one side of the sensor 37. The change of the sensor 37 from the non-sensing state to the sensing state can determine that the sun gear 51 has been pressed in place. S104. Rotate the planetary gear set 5 at a set angle so that the convex teeth of the planet gears 53 are suitable for engaging and pressing into the ring gear 71. Since the ring gear 71 is fixed, it is necessary to adjust the planetary gear set 5 to the angle suitable for engaging the ring gear 71 and then press it down, that is, press it down when in the first preset circumferential angle state. This step uses the servo turntable 8 to rotate the planet carrier 52 to adjust the circumferential orientation of the planetary gear set 5. S105. The clamping mechanism 1 clamps the planetary gear set 5 after the planetary gear set 5 rotates a set angle, which is convenient for the subsequent transfer and positioning of the upper press-fitting mechanism directly above the lower press-fitting mechanism 6.

[0040] During actual press-fitting, the sun gear 51 is inserted into the fixing member 34. In the initial state, the sun gear 51 is located on one side of the inductor 37 and can be sensed. The second telescopic mechanism 3 extends downward to press the sun gear 51. When the bottom surface of the sun gear 51 abuts against the top surface of the planet gear 53, the fixing member 34 is pushed to slide within the connecting sleeve 33, causing the sensed member 36 to move upward beyond the sensing range of the inductor 37. The sensing state of the inductor 37 is a non-sensing state, indicating that the sun gear 51 is not pressed in place. The servo turntable 8 is used to drive the planet carrier 52 to rotate. Under the abutting force of the sun gear 51, the planet gear 53 rotates self to an angle suitable for pressing in the sun gear 51. Under the thrust of the elastic member 35, the fixing member 34 slides downward within the connecting sleeve 33 to flexibly press-fit the sun gear 51. The sensed member 36 follows the fixing member 34 to move downward, and the sensing state of the inductor 37 becomes a sensing state, indicating that the sun gear 51 is pressed in place. The servo turntable 8 drives the planet carrier 52 to rotate by a set angle so that the circumferential angle of the planetary gear set 5 is suitable for press-fitting on the ring gear 71. The clamping mechanism 1 clamps and fixes the planetary gear set 5. The servo platform moves horizontally to align the upper press-fitting mechanism with the lower press-fitting mechanism 6. After the planetary gear set 5 is pressed downward and abuts against the guide plate 621, the clamping mechanism 1 is opened and driven to move upward by the first telescopic mechanism 2. The second telescopic mechanism 3 extends, and the third telescopic mechanism 62 contracts synchronously to press-fit and engage the planetary gear set 5 on the ring gear 71.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A planetary gear set press-fitting device, characterized in that: Including, an upper press-fitting mechanism, the upper press-fitting mechanism includes a clamping mechanism (1) for clamping the planetary gear set (5), a first telescopic mechanism (2) for driving the clamping mechanism (1) to move up and down, a second telescopic mechanism (3) for driving the first telescopic mechanism (2) to move up and down, and a travel sensor (4) for detecting the actual downward pressing distance of the planetary gear set (5) to determine whether it is pressed into the ring gear (71); the telescopic end of the second telescopic mechanism (3) abuts against the planetary gear set (5); the planetary gear set (5) includes a planet carrier (52), a plurality of planet gears (53) arranged on the planet carrier (52), and a sun gear (51) meshing with the plurality of planet gears (53); a lower press-fitting mechanism (6), the lower press-fitting mechanism (6) includes a fixed base (61) for fixing the ring gear (71), a third telescopic mechanism (62) whose telescopic end penetrates through the ring gear (71), and a guiding disk (621) arranged on the third telescopic mechanism (62) and capable of passing through the ring gear (71), the guiding disk (621) is used for receiving the planetary gear set (5) and cooperating with the second telescopic mechanism (3) to press-fit the planetary gear set (5) into the ring gear (71).

2. The planetary gear set pressing device according to claim 1, wherein: The telescopic end of the second telescopic mechanism (3) is provided with a pressing head for pressing the planetary gear set (5) into the ring gear (71) in cooperation with the guiding disk (621) of the third telescopic mechanism (62) after the clamping mechanism (1) is opened and moved upward.

3. A planetary gear set press-fitting device according to claim 2, characterized in that: The telescopic end of the first telescopic mechanism (2) is provided with a travel rod (41), and the travel rod (41) slides into the travel sensor (4); the travel sensor (4) measures the actual downward pressing distance of the planetary gear set (5) according to the displacement of the travel rod (41), and the actual downward pressing distance is used to compare with the preset downward pressing distance for the planetary gear set (5) to be pressed into the ring gear (71) to determine whether the planetary gear set (5) is pressed into the ring gear (71).

4. A planetary gear set press-fitting device according to claim 3, characterized in that: The telescopic end of the second telescopic mechanism (3) is provided with a mounting plate (31); the pressing head includes a plurality of pressing columns (32) spaced on the mounting plate (31) and correspondingly abutting against the end faces of the planet gears (53); a first avoidance hole (311) is formed in the mounting plate (31), and the clamping mechanism (1) vertically slides through the first avoidance hole (311).

5. A planetary gear set press-fitting device according to any one of claims 1-4, characterized in that: The ring gear (71) is fixed on the housing (7), the housing (7) is fixed on the fixed base (61) in a set orientation, the housing (7) has an opening at the top and a second avoidance hole through which the guiding disk (621) passes at the bottom.

6. A planetary gear set press-fitting device according to any one of claims 1-4, characterized in that: It further includes a servo turntable (8) located below the upper pressing mechanism when pressing the sun gear (51) and the planet gears (53) to form the planetary gear set (5). The servo turntable (8) is used to mount and rotate a planet carrier (52) provided with a plurality of planet gears (53); a fixing member (34) for mounting the sun gear (51) is slidably provided at the telescopic end of the second telescopic mechanism (3), and an elastic member (35) is provided between the fixing member (34); an inductor (37) is fixedly provided at the telescopic end of the second telescopic mechanism (3); a sensed member (36) corresponding to the inductor (37) is provided on the fixing member (34); when the end face of the sun gear (51) abuts against the end face of the planet gear (53), the fixing member (34) slides relative to the inductor (37), and after the sensed member (36) slides relative to the inductor (37) following the fixing member (34), it is located outside the sensing range of the inductor (37).

7. The planetary gear set press-fitting device according to claim 6, characterized in that: When the end face of the sun gear (51) abuts against the end face of the planet gear (53), the servo turntable (8) drives the planet carrier (52) to rotate, so that the planet gears (53) rotate self - to an angle suitable for being press - fitted into the sun gear (51) under the abutting force of the end face of the sun gear (51); after the sun gear (51) is pressed into between the planet gears (53), the servo turntable (8) rotates a set angle so that the convex teeth of the planet gears (53) are suitable for meshing with a ring gear (71) with a fixed meshing angle.

8. The planetary gear set press-fitting device according to claim 7, wherein: A first telescopic mechanism (2), the inductor (37) and a connecting sleeve (33) located on one side of the inductor (37) are fixedly provided at the telescopic end of the second telescopic mechanism (3). One end of the fixing member (34) is slidably arranged in the connecting sleeve (33), and both ends of the elastic member (35) act on the connecting sleeve (33) and the fixing member (34) to abut against the fixing member (34) and flexibly press - fit the sun gear (51); the telescopic end of the first telescopic mechanism (2) is provided with the clamping mechanism (1).

9. A press-fitting method for a planetary gear set, characterized in that: Using the planetary gear set pressing device according to any one of claims 1 - 8, the pressing method includes, Installing the planetary gear set (5) at the telescopic end of the second telescopic mechanism (3) at a first set circumferential angle, and the clamping mechanism (1) clamps and fixes the planetary gear set (5); After moving the planetary gear set (5) downward to abut against the guiding disc (621), the clamping mechanism (1) is opened and moved upward relative to the planetary gear set (5); The second telescopic mechanism (3) and the third telescopic mechanism (62) move synchronously to press - fit the planetary gear set (5) onto the ring gear (71); According to the actual downward pressing distance measured by the comparison travel sensor (4) and the preset downward pressing distance for the planetary gear set (5) to be press - fitted into the ring gear (71), it is judged whether the planetary gear set (5) is pressed into the ring gear (71).

10. A press-fitting method for a planetary gear set according to claim 9, characterized in that: It further includes using the upper pressing mechanism and the servo turntable (8) to press - fit the sun gear (51) onto a plurality of planet gears (53) connected to the planet carrier (52) to form the planetary gear set (5); Making the upper pressing mechanism be correspondingly located above the lower pressing mechanism (6).

Images