Split type spline transmission mechanism and gearbox

Abstract

The utility model belongs to the technical field of transmission, and discloses a split type spline transmission mechanism and a gearbox, the split type spline transmission mechanism comprises a rotating body, a spline and a perforation pin, the spline is detachably sleeved on the rotating body, a pin hole is arranged on the matching surface of the spline and the rotating body, and the perforation pin is inserted in the pin hole. And the spline is fixedly connected with the rotating body. When the spline needs to be replaced, the perforation pin arranged in the pin hole is pulled out firstly, then the old spline rotating body is directly taken down, a new spline is arranged on the rotating body in a sleeving mode, and finally the perforation pin is inserted into the pin hole, so that the spline can be maintained, repaired or replaced without replacing the rotating body, convenience and rapidness are achieved, and time and labor are saved; and the efficiency is high. Therefore, an integrated structure of the spline and the rotating body is replaced into a split structure, so that the replacement efficiency of the spline can be effectively improved, the processing cost is low, the shutdown time is shortened, the shutdown loss is reduced, and higher economic benefits of the gear box are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a split-type spline transmission mechanism and a gear box. Background Art

[0002] Currently, in complex load conditions in mining, metallurgy, ports, and construction machinery, speed reducers and main motors are connected using spline connections. Due to the complex load conditions, splines often fail due to pitting, spalling, and even tooth breakage.

[0003] Currently, splines and the gearbox shaft or planetary carrier are manufactured as an integrated structure. When maintaining or repairing the splines, the complex shaft or planetary carrier needs to be disassembled and reassembled with the new splines. This process is costly and time-consuming, resulting in long on-site downtime and significant losses.

[0004] Based on the above, there is an urgent need for a split spline transmission mechanism and a gearbox to solve the problems existing in the existing technology. Utility Model Content

[0005] One purpose of the utility model is to provide a split spline transmission mechanism, which can improve the efficiency of replacing splines and reduce processing costs.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A split-type spline transmission mechanism includes: a rotating body, a spline and a saddle pin. The spline is detachably sleeved on the rotating body, and a pin hole is provided on the mating surfaces of the two. The saddle pin is inserted into the pin hole to fix the spline and the rotating body in connection.

[0008] Preferably, a connecting hole is opened at one axial end of the rotating body, the spline is detachably sleeved in the connecting hole, and there is a limiting space between the outer peripheral surface of the spline and the inner surface of the connecting hole, and the limiting space forms the pin hole.

[0009] Preferably, the spline is detachably sleeved on the outer circumference of the rotating body, and a limiting space is provided between the inner side surface of the spline and the outer circumference of the rotating body, and the limiting space forms the pin hole.

[0010] Preferably, a radial distance A from the tooth root of the spline to the outer peripheral surface of the spline is greater than the module of the spline.

[0011] Preferably, a radial distance B from the mating surface of the rotating body to the outer peripheral surface of the spline is greater than the module of the spline.

[0012] Preferably, the nominal diameter of the pin hole is not less than 1 times the module of the spline.

[0013] Preferably, the spline is connected to the rotating body by interference fit.

[0014] Preferably, a plurality of the saddle pins are arranged on the mating surface of the spline at intervals along the circumferential direction.

[0015] Another object of the present invention is to provide a gear box that can improve the efficiency of replacing splines, reduce processing costs, and ensure economic benefits.

[0016] To achieve this purpose, the present invention adopts the following technical solutions:

[0017] The gearbox comprises a box body and the above-mentioned split spline transmission mechanism, wherein the rotating body of the split spline transmission mechanism is arranged in the box body.

[0018] The split spline transmission mechanism provided by the present invention has the following beneficial effects: when the spline needs to be replaced, the saddle pin provided on the mating surface is pulled out to release the connection restriction between the spline and the rotating body, and then the old spline is directly taken out and the new spline is sleeved on the rotating body, and finally the saddle pin is inserted into the pin hole to limit and fix the new spline on the rotating body, so that the spline can be maintained, repaired or replaced without replacing the rotating body, which is not only convenient and fast, saving time and labor, but also highly efficient, and can effectively improve the replacement efficiency of the spline, with low processing costs, shortened downtime, and reduced downtime losses.

[0019] The beneficial effects of the gearbox provided by the present invention are as follows: the above-mentioned split spline transmission mechanism is arranged in the gearbox. Since the spline can be disassembled from the rotating body in the above-mentioned split spline transmission mechanism, there is no need to disassemble and replace the rotating body together with the spline, thereby simplifying the spline replacement steps, making the spline replacement more convenient and effective, thereby improving the working efficiency of the entire gearbox and ensuring economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the connection between the rotating body and the spline provided by the prior art;

[0021] Figure 2 It is a structural diagram of a spline provided by the prior art;

[0022] Figure 3 This is a schematic diagram of the connection between the rotating body and the spline provided in an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the spline provided in an embodiment of the utility model.

[0024] In the picture:

[0025] 1. Spline; 11. First semicircular hole;

[0026] 2. Rotating body; 21. Connecting hole; 211. Second semicircular hole;

[0027] 3. Saddle pin. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] The technical solution provided by the present invention is described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] Currently, reference Figure 1 、 Figure 2 As shown, the spline transmission mechanism provided by the prior art includes a spline 1 and a rotating body 2, wherein the rotating body 2 is often disposed within a gearbox. The spline 1 and the rotating body 2 are manufactured as an integral structure, making maintenance difficult. When maintaining or repairing the spline 1, the complex rotating body 2 needs to be disassembled and reassembled with a new spline 1. This process is costly and time-consuming, resulting in long on-site downtime and significant losses.

[0034] In view of this, the present embodiment provides a split spline transmission mechanism, which can reduce the processing cost of maintaining or replacing the spline 1 and reduce the time consumed, thereby avoiding long on-site downtime and causing large losses.

[0035] Combine Figure 3 、 Figure 4 As shown, in this embodiment, the split spline transmission mechanism includes a rotating body 2, a spline 1 and a saddle pin 3. One implementation of this embodiment is that the rotating body 2 is a planetary bracket, which can transmit the power generated by the main motor to the load. The planetary bracket is usually composed of components such as a sun gear, a planetary gear and a ring gear. This embodiment will not be described in detail here. A connecting hole 21 is provided at one axial end of the rotating body 2, and the spline 1 is detachably sleeved in the connecting hole 21, and there is a limiting space between the outer peripheral surface of the spline 1 and the inner surface of the connecting hole 21. The limiting space is preferably circular and can form a pin hole for the saddle pin 3 to be inserted and fixedly connected the spline 1 and the rotating body 2.

[0036] The working principle of the split spline transmission mechanism provided in this embodiment is as follows: when the spline 1 needs to be replaced, the saddle pin 3 set in the connecting hole 21 is pulled out to release the restriction of the spline 1 in the connecting hole 21, and then the old spline 1 is directly taken out from the connecting hole 21, and the new spline 1 is inserted into the connecting hole 21. Finally, the saddle pin 3 is inserted into the pin hole to limit and fix the new spline 1 in the connecting hole 21. The maintenance, repair or replacement of the spline 1 can be achieved without replacing the rotating body 2. It is not only convenient and fast, but also time-saving and labor-saving, and highly efficient. In this way, by replacing the spline 1 and the rotating body 2 from an integrated structure to a split structure, the replacement efficiency of the spline 1 can be effectively improved, the processing cost is low, and the downtime is shortened, reducing downtime losses.

[0037] In addition, it should be noted that in some other parallel embodiments, the rotating body 2 can also be a shaft system, which is used to connect the main motor and the load. The main motor can transmit power to the load through the shaft system. The load can be various mechanical equipment, such as pumps, fans, conveyor belts and other equipment. During specific installation, the spline 1 is detachably sleeved on the outer peripheral surface of the rotating body 2, and the above-mentioned limiting space is provided between the inner side surface of the spline 1 and the outer peripheral surface of the rotating body 2 to limit the assembly of the saddle pin 3. Through the above-mentioned arrangement, the purpose of convenient disassembly and assembly of the spline 1 can also be achieved.

[0038] The detailed structure of the split spline transmission mechanism provided in this embodiment will be described in detail below.

[0039] Reference Figure 4 As shown, in this embodiment, a first semicircular hole 11 is provided on the outer peripheral surface of the spline 1, and a second semicircular hole 211 is provided on the inner side wall of the connecting hole 21. The first semicircular hole 11 and the second semicircular hole 211 can cooperate to form a pin hole for the limited insertion of the saddle pin 3, so as to ensure the accuracy of the assembly of the saddle pin 3 in the connecting hole 21 through the formed pin hole, and can also further reduce the possibility of the spline 1 and the connecting hole 21 relative to each other in the axial direction and relative sliding along the axial direction, thereby ensuring the installation stability of the spline 1, and can reduce the wear on the saddle pin 3, thereby extending the service life of the saddle pin 3.

[0040] Of course, in other embodiments, a semicircular hole may be provided only on the outer circumferential surface of the spline 1. During assembly, the saddle pin 3 is embedded in the semicircular hole and pressed against the inner side wall of the connecting hole 21. This can also meet the need to increase the positioning accuracy of the saddle pin 3 to a certain extent, and can also save the process of slotting the connecting hole 21, reducing the complexity of the operation and the production cost. It should be noted that this embodiment does not limit the cross-sectional shape of the semicircular hole. The cross-sectional shape of the semicircular hole can be adaptively adjusted according to actual conditions, as long as it can ensure that the semicircular hole can be pressed against the inner side wall of the connecting hole 21 at the same time.

[0041] Alternatively, in other embodiments, the aforementioned semicircular hole may be opened only on the inner side wall of the connecting hole 21. During assembly, the saddle pin 3 is embedded in the semicircular hole and pressed against the outer circumference of the spline 1. This semicircular hole can also meet the requirement of increasing the positioning accuracy of the pin 3 to a certain extent. Moreover, similarly, this can save the process of opening a semicircular hole on the outer circumference of the spline 1, thereby reducing the complexity of the operation and the manufacturing cost. Therefore, the above three embodiments are all within the scope of protection of the present utility model.

[0042] Furthermore, in this embodiment, the spline 1 is connected to the connecting hole 21 by an interference fit, so that after the spline 1 is inserted into the connecting hole 21, the pitch circle of the spline 1 and the rotating body 2 can be concentric, and the saddle pin 3 can be quickly and effectively inserted into the pin hole, completing the replacement of the spline 1 and ensuring efficiency. Preferably, in this embodiment, the spline 1 and the connecting hole 21 are connected using a basic hole system, and the nominal diameter of the spline 1 is set to φ1, the dimensional tolerance of the spline 1 is n6, and the nominal diameter of the connecting hole 21 is set to φ2, and the dimensional tolerance of the connecting hole 21 is H7.

[0043] Optionally, in this embodiment, the radial distance A from the root of the spline 1 to the outer peripheral surface of the spline 1 is greater than the module of the spline 1. During specific production and manufacturing, the radial distance A can be increased by keeping the distance from the root of the spline 1 to the inner peripheral surface of the spline 1 unchanged and increasing the diameter of the spline 1, so that the spline 1 has sufficient thickness, thereby improving the structural strength of the spline 1 and preventing breakage and damage.

[0044] Optionally, in this embodiment, the radial distance B from the inner wall of the connecting hole 21 (i.e., the mating surface of the rotating body 2) to the outer peripheral surface of the spline 1 is greater than the module of the spline 1, which can increase the radial dimension from the outer peripheral surface of the rotating body 2 at the connecting hole 21 to the inner wall, thereby improving the overall structural stiffness of the rotating body 2 and making the torque transmission stability between the rotating body 2 and the spline 1 higher.

[0045] Optionally, in this embodiment, the nominal diameter of the pin hole is not less than 1 times the module of the spline 1. Through the above setting, the diameter of the pin hole can be effectively increased, so that the contact area of ​​the connecting part between the pin shaft 3 and the spline 1 and the rotating body 2 is increased, thereby improving the torsional strength of the connection, reducing the risk of damage to the pin shaft 3 under load, and extending the durability of the saddle pin 3.

[0046] Furthermore, to enhance the stability of the rotating body 2, a plurality of pins 3 are provided at intervals along the circumferential direction on the mating surface of the spline 1. The number of saddle pins 3 can be determined based on factors such as the actual load force and the diameter of the spline 1, and is not limited in this embodiment. The plurality of pins 3 can evenly distribute the torsional load transmitted by the rotating body 2 to the spline 1, thereby reducing the torsional stress borne by a single pin 3, thereby reducing the risk of pin 3 damage, further improving the stability and reliability of the transmission, and facilitating assembly and disassembly, ensuring the convenience of replacing the spline 1.

[0047] The present embodiment also provides a gearbox, which includes a housing and the above-mentioned split spline transmission mechanism, wherein the rotor 2 of the split spline transmission mechanism is arranged in the housing. Since in the split spline transmission mechanism, the spline 1 is detachably mounted on the rotor 2, and the fixed connection between the two is achieved by a saddle pin 3. In this way, when the spline 1 needs to be replaced, the saddle pin 3 set in the pin hole is pulled out to release the restriction of the spline 1 on the rotor 2, and then the old spline 1 is directly removed from the rotor 2, and the new spline 1 is mounted on the rotor 2, and finally the saddle pin 3 is used to insert it into the pin hole, thereby completing the replacement of the spline 1, and the spline 1 can be replaced without replacing the rotor 2. Compared with the existing gearbox, the present embodiment replaces the spline 1 and the rotor 2 from an integrated structure to a split structure, which can improve the convenience and efficiency of replacing the spline 1, thereby improving the working efficiency and economic benefits of the entire power unit.

[0048] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Split type spline transmission mechanism, characterized in that: include: A rotating body (2), a spline (1) and a saddle pin (3), wherein the spline (1) is detachably sleeved on the rotating body (2), and a pin hole is provided on the mating surfaces of the two, and the saddle pin (3) is inserted into the pin hole to fixedly connect the spline (1) and the rotating body (2).

2. The split-type spline transmission mechanism according to claim 1, characterized in that: A connecting hole (21) is provided at one axial end of the rotating body (2), and the spline (1) is detachably sleeved in the connecting hole (21). A limiting space is provided between the outer peripheral surface of the spline (1) and the inner side surface of the connecting hole (21), and the limiting space forms the pin hole.

3. The split-type spline transmission mechanism according to claim 1, characterized in that: The spline (1) is detachably sleeved on the outer peripheral surface of the rotating body (2), and a limiting space is provided between the inner side surface of the spline (1) and the outer peripheral surface of the rotating body (2), and the limiting space forms the pin hole.

4. The split-type spline transmission mechanism according to claim 1, 2 or 3, characterized in that: A radial distance A from the tooth root of the spline (1) to the outer peripheral surface of the spline (1) is greater than the module of the spline (1).

5. The split-type spline transmission mechanism according to claim 1, 2 or 3, characterized in that: A radial distance B from the mating surface of the rotating body (2) to the outer peripheral surface of the spline (1) is greater than the module of the spline (1).

6. The split-type spline transmission mechanism according to claim 1, 2 or 3, characterized in that: The nominal diameter of the pin hole is not less than 1 times the module of the spline (1).

7. The split-type spline transmission mechanism according to claim 1, 2 or 3, characterized in that: The spline (1) is connected to the rotating body (2) by interference fit.

8. The split-type spline transmission mechanism according to claim 1, 2 or 3, characterized in that: A plurality of saddle pins (3) are arranged on the mating surface of the spline (1) at intervals along the circumferential direction.

9. Gear box, characterized in that, It comprises a box body and a split spline transmission mechanism according to any one of claims 1 to 8, wherein the rotating body (2) of the split spline transmission mechanism is arranged in the box body.

Images