Transmission mechanism and engineering machinery

Abstract

The utility model belongs to the technical field of engineering machinery, and particularly relates to a transmission mechanism and engineering machinery. The transmission mechanism comprises an oil cylinder, a planet assembly, a first clutch and a connecting disc, the planet assembly comprises a sun gear, a planet gear, a planet carrier and a gear ring, and the planet carrier is connected with the oil cylinder; the first clutch is used for combining or separating the sun gear and the planet carrier; the connecting disc is located on the side, away from the oil cylinder, of the planet carrier and connected with the planet carrier. The oil cylinder is connected with the planet carrier, and then the planet carrier is connected with the connecting disc, so that the oil cylinder does not participate in power transmission, and the reliability of the transmission mechanism is improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a transmission mechanism and engineering machinery. Background Technology

[0002] In related technologies, the transmission mechanism includes a hydraulic cylinder, a planetary assembly, and a connecting plate. The planetary carrier in the planetary assembly is connected to the connecting plate, which in turn is connected to the hydraulic cylinder. During power transmission, power is transmitted from the planetary carrier to the connecting plate, then from the connecting plate to the hydraulic cylinder, which then transmits the power to the next stage. The drawback of this technology is that while the hydraulic cylinder participates in power transmission and outputs torque, the connection between the connecting plate and the hydraulic cylinder is typically bolted. Due to structural limitations, bolted connections have limited load-bearing capacity, especially under extreme operating conditions in engineering machinery, where bolts are prone to fatigue failure under alternating loads. Utility Model Content

[0003] The purpose of this utility model is to provide a transmission mechanism and engineering machinery in which the hydraulic cylinder does not participate in power transmission, thereby improving the reliability of the transmission mechanism.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] The transmission mechanism includes:

[0006] Hydraulic cylinder;

[0007] The planetary assembly includes a sun gear, planet gears, a planet carrier, and a ring gear, wherein the planet carrier is connected to the hydraulic cylinder;

[0008] A first clutch is used to engage or disengage the sun gear and the planet carrier;

[0009] A connecting plate is located on the side of the planetary carrier opposite to the hydraulic cylinder, and the connecting plate is connected to the planetary carrier.

[0010] As a preferred technical solution for the transmission mechanism, the hydraulic cylinder includes a cylinder body and a piston, the cylinder body having a piston chamber, and the piston being slidably disposed within the piston chamber;

[0011] A reset assembly is also provided inside the piston cavity. The reset assembly is used to reset the piston. The reset assembly includes a protective shell and an elastic element. The protective shell covers at least the side of the elastic element facing the piston, and the end face of the protective shell facing the piston is parallel to the end face of the piston facing the reset assembly.

[0012] As a preferred technical solution for the transmission mechanism, the protective shell includes a first vertical part, a second vertical part, and a horizontal part connecting the first vertical part and the second vertical part. The first vertical part, the second vertical part, and the horizontal part enclose a receiving space. The elastic member is located within the receiving space. The first vertical part is parallel to the end face of the piston facing the reset assembly, and the first vertical part can abut against the piston.

[0013] As a preferred technical solution for the transmission mechanism, the elastic element is V-shaped and includes a first disc spring and a second disc spring connected at an angle.

[0014] As a preferred technical solution for the transmission mechanism, the side of the reset component away from the piston is limited by a limiting component, which includes a retaining ring and a pressure cap covering the retaining ring.

[0015] As a preferred technical solution for the transmission mechanism, the planetary gear is rotatably mounted on the planetary shaft, and the planetary shaft is connected to the connecting disc via a pin assembly.

[0016] As a preferred technical solution for the transmission mechanism, the pin assembly includes an outer pin and an inner pin. Both the planetary shaft and the connecting disc are provided with pin holes. The outer pin passes through the pin holes on the planetary shaft and the connecting disc, and the inner pin is located inside the outer pin.

[0017] As a preferred technical solution for the transmission mechanism, the cylinder body is provided with a guide member, and the piston is provided with a guide hole. The guide member cooperates with the guide hole to guide the movement of the piston.

[0018] As a preferred technical solution for the transmission mechanism, the transmission mechanism includes a main lubrication oil circuit and four lubrication branch circuits connected to the main lubrication oil circuit. The main lubrication oil circuit passes through the connecting disc, the sun gear, and the oil cylinder axially. The first lubrication branch circuit is used to lubricate the bearing supporting the sun gear. The second lubrication branch circuit is used to lubricate the spline connecting the sun gear and the planet gears and the bearing between the planet gears and the planet shaft. The third lubrication branch circuit is used to lubricate the first clutch. The fourth lubrication branch circuit is used to assist the second lubrication branch circuit and the third lubrication branch circuit in lubrication.

[0019] Construction machinery, including the transmission mechanism described in any of the above embodiments.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides a transmission mechanism including a hydraulic cylinder, a planetary assembly, a first clutch, and a connecting plate. The planetary assembly includes a sun gear, planet gears, a planet carrier, and a ring gear. The planet carrier is connected to the hydraulic cylinder. The first clutch is used to engage or disengage the sun gear and the planet carrier. The connecting plate is located on the side of the planet carrier opposite to the hydraulic cylinder and is connected to the planet carrier. By connecting the hydraulic cylinder to the planet carrier, and then connecting the planet carrier to the connecting plate, the hydraulic cylinder does not participate in power transmission, thus improving the reliability of the transmission mechanism. Attached Figure Description

[0022] Figure 1 This is a front view of the transmission mechanism provided in an embodiment of this utility model;

[0023] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 This is a side view of the transmission mechanism provided in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the lubrication oil circuit of the transmission mechanism provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 10. Hydraulic cylinder; 11. Cylinder body; 111. Guide component; 112. Support shaft; 12. Piston; 121. Guide hole; 21. Sun gear; 211. First lubrication hole; 22. Planetary gear; 221. Second lubrication hole; 23. Planetary shaft; 231. Third lubrication hole; 24. Planetary carrier; 30. First clutch; 31. Clutch gear; 311. Oil chamber; 312. Flanged edge; 313. Diverter hole; 32. Friction element; 40. Connecting plate; 41. Damping hole; 50. Reset assembly; 51. Elastic element; 511. First disc spring; 512. Second disc spring; 52. Protective shell; 521. First vertical part; 522. Second vertical part; 523. Horizontal part; 60. Limiting assembly; 61. Retaining ring; 62. Pressure cap; 70. Pin assembly; 71. Outer pin; 72. Inner pin. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

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

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] like Figures 1 to 3As shown, this embodiment provides a transmission mechanism including a hydraulic cylinder 10, a planetary assembly, a first clutch 30, and a connecting plate 40. The planetary assembly includes a sun gear 21, planet gears 22, a planet carrier 24, and a ring gear. The planet carrier 24 is connected to the hydraulic cylinder 10. The first clutch 30 is used to engage or disengage the sun gear 21 and the planet carrier 24. The connecting plate 40 is located on the side of the planet carrier 24 away from the hydraulic cylinder 10 and is connected to the planet carrier 24. When the first clutch 30 engages the sun gear 21 and the planet carrier 24, the planetary assembly outputs power as a whole. At this time, power is input from the sun gear 21. Because the planet carrier 24 is connected to the connecting plate 40, the planetary assembly transmits power to the connecting plate 40, which then transmits the power to the next stage. When the first clutch 30 disengages the sun gear 21 and the planet carrier 24, the second clutch fixes the ring gear. At this time, power is input from the sun gear 21, then transmitted through the planet gears 22 and the planet carrier 24 to the connecting plate 40, which then transmits the power to the next stage. By connecting the hydraulic cylinder 10 to the planetary carrier 24, and then connecting the planetary carrier 24 to the connecting plate 40, the hydraulic cylinder 10 does not participate in power transmission, thus improving the reliability of the transmission mechanism.

[0033] The hydraulic cylinder 10 includes a cylinder body 11 and a piston 12. The cylinder body 11 has a piston chamber, and a support shaft portion 112 is provided inside the piston chamber. The piston 12 is disposed inside the piston chamber and slidably sleeved on the support shaft portion 112. Furthermore, a guide member 111 is provided on the cylinder body 11, and a guide hole 121 is provided on the piston 12. The guide member 111 cooperates with the guide hole 121 to guide the movement of the piston 12, so as to make the movement of the piston 12 more stable.

[0034] A reset assembly 50 is also provided in the piston chamber, which is used to reset the piston 12. When hydraulic oil is introduced into the piston chamber, the hydraulic oil acts on the piston 12, causing the piston 12 to move in the direction of pressing the reset assembly 50. The piston 12 presses against the friction element 32 of the first clutch 30. The friction element 32 meshes with the clutch gear 31 of the first clutch 30. Since the friction element 32 is connected to the planetary carrier 24 and the clutch gear 31 is located on the sun gear 21, when the friction element 32 meshes with the clutch gear 31, the planetary carrier 24 and the sun gear 21 are combined into one. When the piston chamber is drained, the piston 12 moves away from the friction element 32 under the action of the reset assembly 50. The friction element 32 separates from the clutch gear 31, thereby separating the planetary carrier 24 and the sun gear 21.

[0035] In this embodiment, the reset assembly 50 includes a protective shell 52 and an elastic member 51. Both the protective shell 52 and the elastic member 51 are sleeved on the support shaft portion 112. The protective shell 52 at least covers the side of the elastic member 51 facing the piston 12, and the end face of the protective shell 52 facing the piston 12 is parallel to the end face of the piston 12 facing the reset assembly 50. By providing the protective shell 52 and making the end face of the protective shell 52 facing the piston 12 parallel to the end face of the piston 12 facing the reset spring, the contact area between the piston 12 and the reset assembly 50 can be increased, preventing the piston 12 from wearing out and failing.

[0036] In this embodiment, the protective shell 52 includes a first vertical portion 521, a second vertical portion 522, and a horizontal portion 523 connecting the first vertical portion 521 and the second vertical portion 522. The first vertical portion 521, the second vertical portion 522, and the horizontal portion 523 enclose a receiving space, and the elastic member 51 is located within the receiving space. The first vertical portion 521 is parallel to the end face of the piston 12 facing the reset assembly 50, and the first vertical portion 521 can abut against the piston 12. The structure is simple and easy to assemble. In addition, the length of the second vertical portion 522 is less than the length of the first vertical portion 521, so that part of the elastic member 51 can be exposed outside the protective shell 52.

[0037] In this embodiment, the elastic element 51 is V-shaped and includes a first disc spring 511 and a second disc spring 512 connected at an angle. By setting the elastic element 51 as a double disc spring structure, the structural strength of the elastic element 51 can be improved, and fatigue failure of the elastic element 51 can be avoided.

[0038] In this embodiment, the side of the reset assembly 50 away from the piston 12 is limited by the limiting assembly 60, and the portion of the elastic element 51 exposed outside the protective shell 52 can abut against the limiting assembly 60. The limiting assembly 60 includes a retaining ring 61 and a pressure cap 62, both of which are sleeved on the support shaft portion 112, with the pressure cap 62 pressing against the retaining ring 61. By covering the retaining ring 61 with the pressure cap 62, the retaining ring 61 can be prevented from loosening.

[0039] In this embodiment, the planetary gear 22 is rotatably mounted on the planetary shaft 23. The planetary shaft 23 is connected to the connecting disc 40 via a pin assembly 70. Both the planetary shaft 23 and the connecting disc 40 are provided with pin holes, and the pin assembly 70 passes through the pin holes on the planetary shaft 23 and the connecting disc 40. Specifically, the pin assembly 70 includes an outer pin 71 and an inner pin 72. The outer pin 71 passes through the pin holes on the planetary shaft 23 and the connecting disc 40, and the inner pin 72 is located inside the outer pin 71. This arrangement improves the connection strength between the planetary shaft 23 and the connecting disc 40, thus adapting to the alternating loads continuously generated during the harsh working process of the engineering machinery.

[0040] like Figure 4As shown, the transmission mechanism includes a main lubrication oil circuit and four lubrication branch circuits connected to the main lubrication oil circuit. The main lubrication oil circuit runs axially through the connecting disc 40, the sun gear 21, and the oil cylinder 10. (Refer to...) Figure 4 The path indicated by the middle arrow S10; the first lubrication branch is used to lubricate the bearing supporting the sun gear 21, see reference. Figure 4 The path indicated by the middle arrow S21; the second lubrication branch is used to lubricate the spline connecting the sun gear 21 and the planet gear 22, and the bearing between the planet gear 22 and the planet shaft 23, see reference. Figure 4 The path indicated by the middle arrow S22; the third lubrication branch is used to lubricate the first clutch 30, see reference. Figure 4 The path indicated by the middle arrow S23; the fourth lubrication branch assists the second and third lubrication branches in lubrication, see reference. Figure 4 The path indicated by the middle arrow S24.

[0041] Specifically, the connecting disc 40 is provided with a damping hole 41, which is connected to the main lubrication oil circuit and forms a first lubrication branch. The sun gear 21 is provided with a first lubrication hole 211, the planet gear 22 is provided with a second lubrication hole 221, and the planet shaft 23 is provided with a third lubrication hole 231. The first lubrication hole 211 is connected to the main lubrication oil circuit, and the first lubrication hole 211, the second lubrication hole 221, and the third lubrication hole 231 are connected together. The first lubrication hole 211, the second lubrication hole 221, and the third lubrication hole 231 together form a second lubrication branch. The first lubrication hole 211 is used to guide the lubricating oil from the main lubrication oil circuit to the connecting spline between the sun gear 21 and the planet gear 22, and the second lubrication hole 221 and the third lubrication hole 231 are used to guide the lubricating oil from the first lubrication hole 211 to the bearing between the planet gear 22 and the planet shaft 23. The clutch gear 31 has an oil chamber 311, which is connected to the main lubrication oil passage, forming a third lubrication branch. Preferably, the end of the oil chamber 311 is provided with an inwardly folded flange 312, which is more conducive to retaining more oil inside the oil chamber 311 to achieve clutch lubrication. The clutch gear 31 is provided with a diversion hole 313. After the oil from the main lubrication oil passage passes through the diversion hole 313, part of it flows into the bearing between the planetary gear 22 and the planetary shaft 23, and the other part flows to the friction element 32.

[0042] This embodiment also provides an engineering machine, including the above-described transmission mechanism. By employing the above-described transmission mechanism, the reliability of the transmission can be improved.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A transmission mechanism, characterized in that, include: Hydraulic cylinder (10); The planetary assembly includes a sun gear (21), planet gears (22), a planet carrier (24), and a ring gear, wherein the planet carrier (24) is connected to the hydraulic cylinder (10); A first clutch (30) is used to engage or disengage the sun gear (21) and the planet carrier (24); A connecting plate (40) is located on the side of the planetary carrier (24) away from the oil cylinder (10), and the connecting plate (40) is connected to the planetary carrier (24).

2. The transmission mechanism according to claim 1, characterized in that, The cylinder (10) includes a cylinder body (11) and a piston (12). The cylinder body (11) has a piston chamber, and the piston (12) is slidably disposed in the piston chamber. A reset assembly (50) is also provided in the piston cavity. The reset assembly (50) is used to reset the piston (12). The reset assembly (50) includes a protective shell (52) and an elastic member (51). The protective shell (52) covers at least the side of the elastic member (51) facing the piston (12), and the end face of the protective shell (52) facing the piston (12) is parallel to the end face of the piston (12) facing the reset assembly (50).

3. The transmission mechanism according to claim 2, characterized in that, The protective shell (52) includes a first vertical portion (521), a second vertical portion (522), and a horizontal portion (523) connecting the first vertical portion (521) and the second vertical portion (522). The first vertical portion (521), the second vertical portion (522), and the horizontal portion (523) enclose a receiving space. The elastic member (51) is located within the receiving space. The first vertical portion (521) is parallel to the end face of the piston (12) facing the reset assembly (50). The first vertical portion (521) can abut against the piston (12).

4. The transmission mechanism according to claim 2, characterized in that, The elastic element (51) is V-shaped and includes a first disc spring (511) and a second disc spring (512) connected at an angle.

5. The transmission mechanism according to claim 2, characterized in that, The side of the reset assembly (50) away from the piston (12) is limited by a limiting assembly (60), which includes a retaining ring (61) and a pressure cap (62) covering the retaining ring (61).

6. The transmission mechanism according to claim 1, characterized in that, The planetary gear (22) is rotatably mounted on the planetary shaft (23), and the planetary shaft (23) is connected to the connecting disc (40) via a pin assembly (70).

7. The transmission mechanism according to claim 6, characterized in that, The pin assembly (70) includes an outer pin (71) and an inner pin (72). The planetary shaft (23) and the connecting disk (40) are both provided with pin holes. The outer pin (71) passes through the pin holes on the planetary shaft (23) and the connecting disk (40), and the inner pin (72) is located inside the outer pin (71).

8. The transmission mechanism according to claim 2, characterized in that, The cylinder (11) is provided with a guide member (111), and the piston (12) is provided with a guide hole (121). The guide member (111) and the guide hole (121) cooperate to guide the movement of the piston (12).

9. The transmission mechanism according to any one of claims 1-8, characterized in that, The transmission mechanism includes a main lubrication circuit and four lubrication branches connected to the main lubrication circuit. The main lubrication circuit passes through the connecting disc (40), the sun gear (21), and the oil cylinder (10) axially. The first lubrication branch is used to lubricate the bearing supporting the sun gear (21). The second lubrication branch is used to lubricate the spline connecting the sun gear (21) and the planet gear (22) and the bearing between the planet gear (22) and the planet shaft (23). The third lubrication branch is used to lubricate the first clutch (30). The fourth lubrication branch is used to assist the second lubrication branch and the third lubrication branch in lubrication.

10. Construction machinery, characterized in that, Includes the transmission mechanism as described in any one of claims 1-9.

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