Power takeoff gear engaging executing mechanism

Abstract

The utility model discloses a power takeoff gear engaging executing mechanism, and belongs to the technical field of power takeoff. The power takeoff gear engaging executing mechanism comprises a power takeoff cover, and the power takeoff cover is provided with an air A piston is arranged in the air cylinder and connected with a thrust bearing, and the thrust bearing is connected with one end of an ejector rod. The other end of the ejector rod is connected with a return spring, the return spring is arranged in the power takeoff power output shaft, a combination ring is arranged on the outer side face of the power takeoff power output shaft and meshed with the power takeoff power output shaft, and the ejector rod, the combination ring and the power takeoff power output shaft are provided with a connecting pin in a penetrating mode. The ejector rod and the combination ring can slide on the power takeoff power output shaft, and the power takeoff power output shaft is connected with the power takeoff power output gear through a needle bearing. According to the power takeoff gear engaging execution structure, the design is simplified, the weight and the size are reduced, and the compactness of the internal structure is improved, so that the production cost is effectively reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of power takeoff, specifically relates to a power takeoff gear engagement actuator. BACKGROUND

[0002] The power takeoff is also called power output device, which is a kind of device that outputs power and work in the gearbox or engine. According to different control methods, the power takeoff is divided into hydraulic control, pneumatic control, electric control and other operating methods, among which the pneumatic control is the most common.

[0003] At present, the mainstream power takeoff at home and abroad is realized by pneumatic to achieve gear engagement and disengagement function. The traditional power takeoff is assembled with a control device assembly on the power takeoff shell, and the axial movement of the sliding sleeve is controlled by the shift fork in the control assembly, so as to realize the gear engagement and disengagement of the power takeoff.

[0004] The existing power takeoff meets the demand in function, but there are still many problems in the existing power takeoff. For example, in the structure of the existing power takeoff, multiple components are usually needed to realize the gear engagement and disengagement function, including the shift fork structure, the sliding sleeve and the related pneumatic control device, etc. These components not only make the overall structure of the power takeoff complex, but also make the overall weight of the power takeoff larger, occupy larger space, etc. In order to solve these problems, it is urgent to integrate and optimize the structure of the existing power takeoff in order to reduce the weight of the power takeoff and reduce the occupied space. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses in order to solve the problems of the existing power takeoff structure, complex, heavy, large space occupation, proposes a kind of power takeoff gear engagement actuator, and the layout of the present power takeoff gear engagement structure is more compact, can improve the integrated degree of whole box, more convenient for power takeoff arrangement.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] A kind of power takeoff gear engagement actuator, including power takeoff cover, power takeoff cover is equipped with cylinder;Piston is arranged in cylinder, piston is movably connected by thrust bearing and the one end of top rod;The other end of top rod is movably connected with return spring, return spring is arranged in power takeoff power output shaft, the outer side of power takeoff power output shaft is equipped with combination ring, combination ring and power takeoff power output shaft are engaged, top rod, combination ring and power takeoff power output shaft are arranged through connecting pin, top rod and combination ring can slide on power takeoff power output shaft, power takeoff power output shaft and power takeoff power output gear are connected by needle bearing.

[0008] The top rod is provided with two first pin holes which are symmetrical to the center, the coupling ring is provided with two second pin holes which are symmetrical to the center, the power output shaft of the power take-off device is provided with two sliding pin holes which are symmetrical to the center, the first pin hole, the second pin hole and the sliding pin hole are on the same line, the connecting pin penetrates through the first pin hole, the second pin hole and the sliding pin hole, the sliding pin hole is a strip hole, and the top rod and the coupling ring can slide along the sliding pin hole on the power output shaft of the power take-off device.

[0009] The coupling ring is provided with an inner spline, and the outer side of the power output shaft of the power take-off device is provided with an outer spline, and the inner spline is engaged with the outer spline.

[0010] The coupling ring is provided with a first engaging tooth at one end close to the power output gear of the power take-off device, the power output gear of the power take-off device is provided with a second engaging tooth at one end close to the coupling ring, and the first engaging tooth is engaged with the second engaging tooth.

[0011] The piston is provided with a first thrust bearing clamping groove at one end close to the thrust bearing, the top rod is provided with a second thrust bearing clamping groove at one end close to the thrust bearing, and the two ends of the thrust bearing are arranged in the first thrust bearing clamping groove and the second thrust bearing clamping groove respectively.

[0012] The top of the power take-off device cover is provided with an air hole.

[0013] The power take-off device cover is provided with a plurality of bolt holes which are uniformly distributed, and the power take-off device cover is fixed on the power take-off device shell through the bolt holes and bolts.

[0014] The power take-off device cover and the piston are provided with an oil retaining ring.

[0015] The oil retaining ring and the piston are provided with a sealing ring.

[0016] The thrust bearing adopts a thrust ball bearing or a thrust cylindrical roller bearing.

[0017] Compared with the prior art, the power take-off device cover provided by the utility model has the advantages that:

[0018] The power take-off device cover provided by the utility model replaces the cylinder cover and the cylinder of the traditional power take-off device, and the direct engagement mode of the coupling ring and the power output gear of the power take-off device replaces the traditional fork cooperation mode, so that the use of the fork, the fork shaft, the cylinder body, the cylinder cover and part of the connecting components and other parts is reduced, the structure of the power take-off device is more compact, the compactness of the structure not only helps to save space, but also improves the cooperative working efficiency between components, the volume and weight are greatly reduced, the applicability of the power take-off device can be improved, and the generation cost is reduced by reducing the use of parts.

[0019] Further, by arranging the first engaging tooth and the second engaging tooth, the power take-off device power output gear can drive the power take-off device power output shaft to realize gear engagement and rotate at the same speed.

[0020] Further, the inner spline is arranged in the combination ring, and the outer spline is arranged on the outer side of the power take-off power output shaft, the splines are directly engaged, the use of parts is reduced, and the engagement precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

[0022] Figure 1 The present application provides a whole horizontal explosion diagram of the gear engagement execution mechanism of the power take-off;

[0023] Figure 2 The present application provides a whole isometric side explosion diagram of the gear engagement execution mechanism of the power take-off;

[0024] Figure 3 The present application provides a connecting pin schematic diagram of the gear engagement execution mechanism of the power take-off;

[0025] Figure 4 The present application provides a piston connection diagram of the gear engagement execution mechanism of the power take-off;

[0026] Figure 5 The present application provides a free state schematic diagram of the gear engagement execution mechanism of the power take-off;

[0027] Figure 6 The present application provides a gear engagement state schematic diagram of the gear engagement execution mechanism of the power take-off.

[0028] 1, power take-off cover; 2, oil retaining ring; 3, sealing ring; 4, piston; 5, thrust bearing; 6, ejector rod; 7, return spring; 8, combination ring; 9, connecting pin; 10, power take-off power output shaft; 11, needle bearing; 12, power take-off power output gear; 101, air hole; 102, bolt hole; 103, air cylinder; 401, first thrust bearing clamping groove; 601, first pin hole; 602, second thrust bearing clamping groove; 801, inner spline; 802, second pin hole; 803, first engagement tooth; 1001, outer spline; 1002, sliding pin hole; 1201, second engagement tooth. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0031] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the embodiments of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] The utility model makes further explanation in connection with the drawings:

[0036] Traditional power take-off gear structure is composed of cylinder body, cylinder cover, piston, return spring, limit sleeve, shift fork shaft, shift fork and related connecting piece, cylinder body, cylinder cover and power take-off shell connection, shift fork shaft and shift fork are connected through screw, fork foot of shift fork cooperates with sliding gear, return spring is tightly pressed on limit sleeve through piston, piston is fixed on shift fork shaft, whole structure is more complex, poor reliability, it occupies larger space.

[0037] As shown in Figure 1 and Figure 2 Exemplary embodiments of the present disclosure provide a power take-off gear shifting execution mechanism, comprising a power take-off cover 1, an oil retaining ring 2, a piston 4, a thrust bearing 5, a jacking rod 6, a return spring 7, a coupling ring 8, a connecting pin 9, a power take-off output shaft 10, a needle bearing 11, a power take-off output gear 12.

[0038] The power take-off cover 1 is provided with a cylinder 103, the piston 4 is arranged in the cylinder 103, the piston 4 is connected with the power take-off cover 1, and the piston 4 is movably connected with one end of the jacking rod 6 through the thrust bearing 5; the other end of the jacking rod 6 is movably connected with the return spring 7, the return spring 7 is arranged in the power take-off output shaft 10 and connected with the power take-off output shaft 10, the outer side of the power take-off output shaft 10 is provided with the coupling ring 8, the coupling ring 8 is engaged with the power take-off output shaft 10, the jacking rod 6, the coupling ring 8 and the power take-off output shaft 10 are provided with the connecting pin 9, the jacking rod 6 and the coupling ring 8 can slide on the power take-off output shaft 10, and the power take-off output shaft 10 is connected with the power take-off output gear 12 through the needle bearing 11.

[0039] In some embodiments, the power take-off cover 1 is provided with air holes 101 at the top; the power take-off cover 1 is provided with a plurality of bolt holes 102 uniformly distributed, and the power take-off cover 1 is fixed on the power take-off shell through the bolt holes 102 and bolts.

[0040] In some embodiments, the oil retaining ring 2 is arranged between the power take-off cover 1 and the piston 4; the oil retaining ring 2 can prevent oil leakage and ensure air tightness, and to further prevent air tightness, a sealing ring 3 is arranged between the oil retaining ring 2 and the piston 4.

[0041] As shown in Figure 3 and Figure 4As shown, in some embodiments, a first thrust bearing groove 401 is provided at one end of the piston 4 connected to the thrust bearing 5; a second thrust bearing groove 602 is provided at one end of the push rod 6 connected to the thrust bearing 5; both ends of the thrust bearing 5 are respectively located in the first thrust bearing groove 401 and the second thrust bearing groove 602; the thrust bearing 5 is a thrust ball bearing or a thrust cylindrical roller bearing, and the provision of the thrust bearing 5 prevents the push rod 6 from driving the piston 4 to rotate.

[0042] In some embodiments, the push rod 6 is provided with two centrally symmetrical first pin holes 601, the coupling ring 8 is provided with two centrally symmetrical second pin holes 802, and the power take-off (PTO) output shaft 10 is provided with two centrally symmetrical sliding pin holes 1002. The first pin holes 601, second pin holes 802, and sliding pin holes 1002 are on the same straight line, and the connecting pin 9 passes through the first pin holes 601, second pin holes 802, and sliding pin holes 1002. The sliding pin holes 1002 are strip-shaped holes, allowing the push rod 6 and the coupling ring 8 to slide along the sliding pin holes 1002 on the PTO output shaft 10. An internal spline 801 is provided inside the coupling ring 8, and an external spline 1001 is provided on the outside of the PTO output shaft 10. The internal spline 801 and the external spline 1001 mesh.

[0043] In some embodiments, a first engagement tooth 803 is provided at one end of the coupling ring 8 near the power take-off power output gear 12; a second engagement tooth 1201 is provided at one end of the power take-off power output gear 12 near the coupling ring 8. The first engagement tooth 803 and the second engagement tooth 1201 mesh, so that the power take-off power output gear 12 drives the power take-off power output shaft 10 to rotate at the same speed, thereby realizing gear engagement.

[0044] This power take-off (PTO) gear shifting mechanism integrates the cylinder head and cylinder of a traditional PTO, and replaces the traditional shift fork engagement method with a direct meshing method between the coupling ring and the PTO power output gear. This reduces the use of parts such as shift forks, shift fork shafts, cylinder blocks, cylinder heads, and some connecting components, thereby reducing the overall size and weight of the PTO and making the internal structure of the PTO more compact and cost-effective.

[0045] The working process of the power take-off gear engagement actuator provided in the exemplary embodiments of this disclosure includes:

[0046] like Figure 5 As shown, in the free state of the power take-off, the power take-off power output gear 12 is constantly meshed with the power take-off power input gear. At this time, the power take-off power output gear 12 moves freely on the power take-off power output shaft 10 through the needle roller bearing 11, and the power take-off power output shaft 10 is in a stationary state.

[0047] like Figure 6When the power take-off is engaged, the air hole 101 on the power take-off cover 1 is ventilated, the piston 4 is pushed to move, and then the push rod 6 and the combination ring 8 are pushed to move in the sliding pin hole 1002 through the thrust bearing 5, at this time, the return spring 7 is compressed, the combination ring 8 is engaged with the power take-off power output gear 12 through the first engagement tooth 803 and the second engagement tooth 1201, so that the power take-off power output gear 12 drives the power take-off power output shaft 10 to rotate at the same speed, and the gear is engaged; wherein, due to the existence of the thrust bearing 5, the push rod 6 will not drive the rotation of the piston 4 in the rotation process.

[0048] When the power take-off is disengaged, the air hole 101 on the power take-off cover 1 stops being ventilated, the return spring 7 releases the spring force to push the push rod 6 and the combination ring 8 to move, the combination ring 8 is separated from the power take-off power output gear 12, the push rod 6 pushes the thrust bearing 5 and the piston 4 to return to the original position, the power take-off is disengaged, and returns to the free state.

[0049] The above embodiment is only used to illustrate the technical scheme of the utility model and is not limited thereto, although the utility model has been described in detail with reference to the above embodiment, the ordinary skilled in the art can still modify or replace the specific implementation mode of the utility model, and any modification or replacement which does not deviate from the spirit and scope of the utility model is within the protection scope of the claims of the utility model.

Claims

1. A power takeoff gear engagement actuator characterized by, The power take-off cover (1) is provided with a cylinder (103); the piston (4) is movably connected to the cylinder (103) through a thrust bearing (5) and one end of a top rod (6); the other end of the top rod (6) is movably connected to a return spring (7), which is arranged in a power take-off output shaft (10); the power take-off output shaft (10) is provided with a coupling ring (8) on the outer side; the coupling ring (8) and the power take-off output shaft (10) are engaged; the top rod (6), the coupling ring (8) and the power take-off output shaft (10) are provided with a connecting pin (9) penetrating through; the top rod (6) and the coupling ring (8) can slide on the power take-off output shaft (10); and the power take-off output shaft (10) is connected to a power take-off output gear (12) through a needle bearing (11).

2. A gearshift actuator according to claim 1, characterized in that The top rod (6) is provided with two first pin holes (601) symmetrically arranged at the center; the coupling ring (8) is provided with two second pin holes (802) symmetrically arranged at the center; the power take-off output shaft (10) is provided with two sliding pin holes (1002) symmetrically arranged at the center; the first pin holes (601), the second pin holes (802) and the sliding pin holes (1002) are arranged on the same line; the connecting pin (9) penetrates through the first pin holes (601), the second pin holes (802) and the sliding pin holes (1002); the sliding pin holes (1002) are strip-shaped holes; and the top rod (6) and the coupling ring (8) can slide on the power take-off output shaft (10) along the sliding pin holes (1002).

3. The take-off gear engagement actuator of claim 1, wherein, The coupling ring (8) is provided with an inner spline (801); and the power take-off output shaft (10) is provided with an outer spline (1001) on the outer side; the inner spline (801) and the outer spline (1001) are engaged.

4. The take-off gear engagement actuator of claim 1, wherein, The coupling ring (8) is provided with a first engaging tooth (803) at one end close to the power take-off output gear (12); the power take-off output gear (12) is provided with a second engaging tooth (1201) at one end close to the coupling ring (8); and the first engaging tooth (803) and the second engaging tooth (1201) are engaged.

5. The take-off gear engagement actuator of claim 1, wherein, The piston (4) is provided with a first thrust bearing clamping groove (401) at one end close to the thrust bearing (5); the top rod (6) is provided with a second thrust bearing clamping groove (602) at one end close to the thrust bearing (5); and the thrust bearing (5) is arranged in the first thrust bearing clamping groove (401) and the second thrust bearing clamping groove (602) respectively.

6. A take-off gear engagement actuator according to claim 1, wherein, The power take-off cover (1) is provided with an air hole (101) at the top.

7. A take-off gear engagement actuator according to claim 1, wherein, The power take-off cover (1) is provided with a plurality of bolt holes (102) arranged uniformly; and the power take-off cover (1) is fixed on a power take-off shell through the bolt holes (102) and bolts.

8. The take-off gear engagement actuator of claim 1, wherein, The power take-off cover (1) and the piston (4) are provided with an oil baffle (2).

9. A take-off gear engagement actuator according to claim 8, wherein, The oil baffle (2) and the piston (4) are provided with a sealing ring (3).

10. The take-off gear engagement actuator of claim 1, wherein, The thrust bearing (5) is a thrust ball bearing or a thrust cylindrical roller bearing.

Images