Planetary gear carrier with adjustable axle distance

Abstract

The utility model relates to the field of planetary gear carriers, and discloses a wheel base-adjustable planetary gear carrier, which comprises a planetary carrier, the three planet gears are mounted on the planet carrier; the three connecting shafts are arranged on the planet carrier and distributed in a circumferential array mode, the planet wheels are connected to the connecting shafts, and the three connecting shafts are arranged to be close to or away from the circle center of the planet carrier at the same time; and the three screw rods are arranged on the planet carrier and are respectively connected with the three connecting shafts. According to the planetary gear carrier, flexible adjustment of the axle distance of the planetary gear carrier is achieved through the built-in adjusting structure, rapid adjustment of the axle distance is achieved, the transmission requirements under different application scenes are met, the built-in adjusting structure has small influences on the transmission efficiency and precision of the planetary gear carrier, and the normal transmission path of the planetary gear cannot be interfered; the device is not liable to be interfered by an external environment, and the stability and reliability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the field of planetary gear racks, in particular to a planetary gear rack with adjustable wheelbase. Background Art

[0002] The planet carrier is a component used to support and position the planetary gears in a planetary gear mechanism. It is usually located between the outer planetary gears and the inner ring gear. Through its engagement with the planetary gears, the planetary gears move along the orbit of the sun gear and can also rotate around the inner ring gear.

[0003] Existing planetary gear carriers generally adopt a fixed wheelbase design. That is, once the relative positions between the planetary gears, the sun gear, and the inner ring gear are determined, it is difficult to adjust the wheelbase. To solve this problem, some designers have tried to add an adjustment structure to the outside of the planetary carrier.

[0004] However, although the external adjustment structure solves the problem of unadjustable wheelbase to a certain extent, the existing adjustment structure is set on the outside of the planetary carrier, which not only affects the transmission efficiency and accuracy of the planetary gear carrier, but may also cause equipment damage or safety hazards. Utility Model Content

[0005] In order to solve the above-mentioned problems, the present invention is implemented through the following technical solutions.

[0006] A planetary gear carrier with adjustable wheelbase comprises: a planetary carrier; three planetary wheels mounted on the planetary carrier; three connecting shafts arranged on the planetary carrier and distributed in a circular array, the planetary wheels connected to the connecting shafts, and the three connecting shafts are configured to simultaneously approach or move away from the center of the planetary carrier; three screw rods mounted on the planetary carrier and respectively connected to the three connecting shafts; an adjusting ring in the shape of a ring, mounted on the outer ring of the planetary carrier, the three screw rods connected to the adjusting ring, and the adjusting ring is configured to drive the three screw rods to rotate simultaneously when rotating on the planetary carrier.

[0007] Preferably, the planetary frame includes: three adjustment slots, which are opened on the planetary frame and distributed in a circular array, and three screw rods are respectively connected to the three adjustment slots; three movable seats, which are respectively connected to the three adjustment slots, and three connecting shafts are respectively connected to the three movable seats, and one end of the screw rod passes through the movable seat.

[0008] Preferably, the planetary carrier also includes: three through holes, respectively opened on the inner walls of the three adjustment slots, and the other end of the screw rod extends into the through holes; three driving gears, respectively installed in the three through holes; three first bevel gears, respectively connected to the three screw rods; three second bevel gears, respectively connected to the three driving gears, and the three first bevel gears are respectively connected to the three second bevel gears.

[0009] Preferably, the adjusting ring comprises: three racks installed on the inner ring of the adjusting ring and distributed in a circular array, and the racks are connected to the driving gear.

[0010] Preferably, the rack is arc-shaped.

[0011] Preferably, the adjusting ring further comprises: a screw, one end of which is mounted on the planet carrier; and a nut mounted on the screw and in contact with the adjusting ring.

[0012] Preferably, an adjusting hole is provided on the outer ring of the adjusting ring, and the screw passes through the adjusting hole.

[0013] Preferably, it further comprises: a ring gear mounted on one side of the planet carrier, the three planetary gears meshing with the teeth in the ring gear; and a sun gear mounted on the planet carrier, the sun gear meshing with the three planetary gears at the same time.

[0014] The utility model provides a planetary gear carrier with adjustable wheelbase. Compared with the prior art, it has the following advantages:

[0015] 1. The built-in adjustment structure enables flexible adjustment of the planetary gear carrier wheelbase, so that the relative positions between the planetary gears, sun gear, and inner ring gear can be adjusted as needed, realizing rapid adjustment of the wheelbase and meeting the transmission requirements in different application scenarios.

[0016] 2. The built-in adjustment structure of this solution has little impact on the transmission efficiency and accuracy of the planetary gear carrier. Since the adjustment structure is located inside the planetary carrier, it will not interfere with the normal transmission path of the planetary gear and is not easily affected by the external environment. It reduces additional friction and loss and improves the stability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure proposed by the utility model.

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure from another perspective proposed by the utility model.

[0019] Figure 3 This is a schematic structural diagram of the planet carrier, connecting shaft, moving seat and adjusting ring proposed in the utility model.

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the planet carrier and the adjustment ring proposed in the present utility model.

[0021] Figure 5 This is an enlarged view of the connecting shaft, movable seat, screw rod, first bevel gear, driving gear, second bevel gear and rack proposed in the utility model.

[0022] The reference numerals in the figures are:

[0023] 1. Ring gear;

[0024] 2. Planet carrier; 201. Connecting shaft; 202. Adjusting slot; 203. Moving seat; 204. Screw; 205. First bevel gear; 206. Driving gear; 207. Second bevel gear;

[0025] 3. Planetary gear;

[0026] 4. Sun gear;

[0027] 5. Adjusting ring; 501. Adjusting hole; 502. Nut; 503. Screw; 504. Rack. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of protection of the present invention.

[0029] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0030] Reference Figure 1-Figure 5 , a planetary gear carrier with adjustable wheelbase, comprising: a planetary carrier 2; three planetary gears 3, mounted on the planetary carrier 2; three connecting shafts 201, arranged on the planetary carrier 2, distributed in a circular array, the planetary gears 3 are connected to the connecting shafts 201, and the three connecting shafts 201 are arranged to simultaneously approach or move away from the center of the planetary carrier 2. By adjusting the positions of the connecting shafts 201, the meshing relationship between the planetary gears 3, the sun gear 4, and the ring gear 1 can be changed, thereby achieving adjustment of the wheelbase; three screw rods 204, mounted on the planetary carrier 2, respectively connected to the three connecting shafts 201, the screw rods 204 are connected to the connecting shafts 201, and the screw rods 204 are connected to the connecting shafts 201. The rotation of the screw rod 204 can push the connecting shaft 201 towards or away from the center of the planetary carrier 2. The design of the screw rod 204 makes the adjustment of the wheelbase more precise and controllable, and improves the flexibility and adaptability of the transmission system; the adjusting ring 5 is in a circular shape and is installed on the outer ring of the planetary carrier 2. The three screw rods 204 are connected to the adjusting ring 5. The adjusting ring 5 is configured to drive the three screw rods 204 to rotate at the same time when rotating on the planetary carrier 2. By rotating the adjusting ring 5, the screw rods 204 can be driven to rotate at the same time, thereby realizing rapid adjustment of the wheelbase. The design of the adjusting ring 5 simplifies the operation process of wheelbase adjustment and improves work efficiency.

[0031] The planetary carrier 2 includes: three adjustment slots 202, which are opened on the planetary carrier 2 and distributed in a circular array. Three screw rods 204 are respectively connected to the three adjustment slots 202. The design of the adjustment slots 202 enables the screw rods 204 and the movable seat 203 to move smoothly, ensuring the accuracy and stability of the wheelbase adjustment; three movable seats 203 are respectively connected to the three adjustment slots 202, and three connecting shafts 201 are respectively connected to the three movable seats 203. One end of the screw rod 204 passes through the movable seat 203. The design of the movable seat 203 enhances the supporting stability of the connecting shaft 201 and improves the reliability of the wheelbase adjustment; three through holes are respectively opened on the inner walls of the three adjustment slots 202, and the other end of the screw rod 204 is connected to the inner wall of the three adjustment slots 202. The end extends into the through hole; three driving gears 206 are respectively installed in the three through holes, through which the screw rod 204 can be smoothly connected to the driving gear 206 to realize rotation transmission; three first bevel gears 205 are respectively connected to the three screw rods 204; three second bevel gears 207 are respectively connected to the three driving gears 206, and the three first bevel gears 205 are respectively connected to the three second bevel gears 207. The design of the driving gear 206 enables the rotation of the adjusting ring 5 to be converted into the rotation of the screw rod 204, thereby realizing the adjustment of the wheelbase. The design of the bevel gears makes the rotation direction of the screw rod 204 consistent with the rotation direction of the adjusting ring 5, while reducing the friction and loss during the rotation process.

[0032] The adjusting ring 5 includes: three racks 504, which are installed on the inner ring of the adjusting ring 5 and are distributed in a circular array. The racks 504 are connected to the driving gear 206. The racks 504 are arc-shaped. The design of the racks 504 enables the rotation of the adjusting ring 5 to be smoothly transmitted to the driving gear 206, thereby realizing precise adjustment of the wheelbase; a screw 503, one end of which is installed on the planetary carrier 2; a nut 502, which is installed on the screw 503 and contacts the adjusting ring 5; an adjusting hole 501 is provided on the outer ring of the adjusting ring 5, and the screw 503 passes through the adjusting hole 501. The design of the screw 503 and the nut 502 provides a reliable fixing method for the adjusting ring 5, ensuring the stability of the wheelbase adjustment. The position of the screw 503 can be easily installed and adjusted through the adjusting hole 501, thereby realizing the fixation and adjustment of the adjusting ring 5. By rotating the nut 502, the position of the adjusting ring 5 on the planetary carrier 2 can be tightened.

[0033] The ring gear 1 is mounted on one side of the planet carrier 2, and the three planetary gears 3 are meshed with the teeth inside the ring gear 1; the sun gear 4 is mounted on the planet carrier 2, and the sun gear 4 is meshed with the three planetary gears 3 at the same time.

[0034] During use, when the wheelbase needs to be adjusted, first loosen the nut 502 to allow the adjusting ring 5 to rotate freely on the planetary carrier 2, ensuring that all components are in an adjustable state to avoid unnecessary friction or damage during the adjustment process. Turn the adjusting ring 5 manually or by other driving methods. The rotation of the adjusting ring 5 will drive the rack 504 on its inner ring to rotate together. The rack 504 is engaged with the driving gear 206, so the rotation of the rack 504 will be converted into the rotation of the driving gear 206. The rotation of the driving gear 206 will drive the second bevel gear 207 connected thereto to rotate together. The second bevel gear 207 is engaged with the first bevel gear 205, so the second bevel gear The rotation of wheel 207 will be converted into the rotation of the first bevel gear 205. The rotation of the screw rod 204 will generate linear motion, pushing the movable seat 203 connected thereto to move in the adjustment slot 202. The movement of the movable seat 203 will drive the connecting shaft 201 and the planetary gear 3 to move closer to or away from the center of the planetary carrier 2, thereby changing the wheelbase of the three connecting shafts 201. By tightening the nut 502, the adjusting ring 5 is fixed to the planetary carrier 2 to ensure the stability of the wheelbase adjustment. After the wheelbase adjustment is completed, necessary inspections and tests are carried out to ensure that the transmission performance, stability and reliability of the planetary gear carrier meet the requirements. If further adjustment is required, the above steps can be repeated for fine-tuning.

[0035] In summary, compared with the existing technology, it has the following beneficial effects:

[0036] The built-in adjustment structure enables flexible adjustment of the planetary gear carrier wheelbase, so that the relative positions between the planetary gear 3, the sun gear 4 and the inner ring gear 1 can be adjusted as needed, realizing rapid adjustment of the wheelbase and meeting the transmission requirements in different application scenarios.

[0037] The built-in adjustment structure of this solution has little effect on the transmission efficiency and accuracy of the planetary gear carrier. Since the adjustment structure is located inside the planetary carrier 2, it will not interfere with the normal transmission path of the planetary gear 3 and is not easily affected by the external environment, reducing additional friction and loss and improving the stability and reliability of the equipment.

[0038] Thus, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are within the foregoing disclosure, and it should be understood that in some cases, some features of the present invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt particular circumstances or materials to the true scope and spirit of the present invention. The present invention is not intended to be limited to the specific terminology used in the claims below and / or to the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined solely by the appended claims.

Claims

1. A planetary gear carrier with adjustable wheelbase, characterized in that: include: Planet carrier (2); Three planetary gears (3) mounted on the planetary carrier (2); Three connecting shafts (201) are arranged on the planet carrier (2) and distributed in a circumferential array, the planetary gears (3) are connected to the connecting shafts (201), and the three connecting shafts (201) are arranged to simultaneously approach or move away from the center of the planet carrier (2); Three screw rods (204) are mounted on the planet carrier (2) and are respectively connected to the three connecting shafts (201); The adjusting ring (5) is annular and is mounted on the outer ring of the planetary frame (2). Three screw rods (204) are connected to the adjusting ring (5). The adjusting ring (5) is configured to drive the three screw rods (204) to rotate simultaneously when rotating on the planetary frame (2).

2. The planetary gear carrier with adjustable wheelbase according to claim 1, characterized in that: The planet carrier (2) comprises: Three adjustment slots (202) are provided on the planetary frame (2) and are distributed in a circular array, and three screw rods (204) are respectively connected to the three adjustment slots (202); The three movable seats (203) are respectively connected to the three adjustment slots (202), the three connecting shafts (201) are respectively connected to the three movable seats (203), and one end of the screw rod (204) passes through the movable seat (203).

3. The planetary gear carrier with adjustable wheelbase according to claim 2, characterized in that: The planet carrier (2) further comprises: Three through holes are respectively formed on the inner walls of the three adjustment slots (202), and the other end of the screw rod (204) extends into the through holes; Three driving gears (206) are respectively installed in the three through holes; Three first bevel gears (205) are respectively connected to the three screw rods (204); The three second bevel gears (207) are respectively connected to the three driving gears (206), and the three first bevel gears (205) are respectively connected to the three second bevel gears (207).

4. The planetary gear carrier with adjustable wheelbase according to claim 3, characterized in that: The adjusting ring (5) comprises: Three racks (504) are mounted on the inner ring of the adjustment ring (5) and are distributed in a circumferential array. The racks (504) are connected to the driving gear (206).

5. The planetary gear carrier with adjustable wheelbase according to claim 4, characterized in that: The rack (504) is in an arc shape.

6. The planetary gear carrier with adjustable wheelbase according to claim 1, characterized in that: The adjusting ring (5) further comprises: A screw (503), one end of which is mounted on the planet carrier (2); The nut (502) is mounted on the screw (503) and contacts the adjusting ring (5).

7. The planetary gear carrier with adjustable wheelbase according to claim 6, characterized in that: The outer ring of the adjusting ring (5) is provided with an adjusting hole (501), and the screw (503) passes through the adjusting hole (501).

8. The planetary gear carrier with adjustable wheelbase according to claim 1, characterized in that: Also includes: A ring gear (1) is mounted on one side of the planet carrier (2), and three planetary gears (3) are meshed with teeth in the ring gear (1); The sun gear (4) is mounted on the planet carrier (2), and the sun gear (4) is meshed with the three planet gears (3) at the same time.

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