Meshing sleeve gear shifting mechanism

Abstract

The utility model discloses a meshing sleeve gear shifting mechanism which comprises a main speed change driving shaft. A meshing seat is arranged on the main speed change driving shaft, a meshing sleeve is sleeved on the meshing seat in a movable fit mode, a plurality of gear driving gears and at least one spline housing are arranged on the main speed change driving shaft, and the gear driving gear close to the meshing sleeve is rotatably sleeved on the spline housing or rotatably sleeved on the main speed change driving shaft. The spline housing is rotatably sleeved on the main speed change driving shaft, one end of the spline housing is meshed with the gear driving gear far away from the meshing sleeve, and the other end of the spline housing is provided with meshing teeth which can be meshed with the inner gear ring of the meshing sleeve; a receding space is formed between the two sections of inner gear rings of the meshing sleeve, so that the inner gear rings of the meshing sleeve can only be meshed with the spline housing or the corresponding meshing teeth of the driving gear of one gear all the time in the gear shifting process of the meshing sleeve moving leftwards or rightwards. According to the utility model, multi-gear shifting of the meshing sleeve is realized, the structure is compact, and the operability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a gear shifting mechanism of an engagement sleeve. Background Art

[0002] Traditional gear shifting mechanisms employ gears on either side of the gear sleeve, with the shift fork moving the sleeve left and right to shift gears. However, due to the position and structural characteristics of the gears on either side, the gear sleeve cannot cross the gears, making multi-gear shifting difficult. Existing gear-slip shifting mechanisms, while capable of multi-gear shifting, suffer from gear misalignment, making shifting difficult. Furthermore, the clearance between the gears significantly impacts gear meshing accuracy. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a meshing sleeve gear changing mechanism to solve the problems of the prior art meshing sleeve shifting mechanism being difficult to achieve multi-gear switching, the gear shifting mechanism being difficult to switch gears, and the poor gear meshing accuracy.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a meshing sleeve gear shifting mechanism, including a main speed change driving shaft for inputting power; an engagement seat is provided on the main speed change driving shaft, the engagement seat is provided with external teeth, an engagement sleeve is provided on the engagement seat in a sliding manner, and two sections of inner gear rings are distributed along the axial direction of the inner hole of the engagement sleeve, which can mesh with the external teeth on the engagement seat, and a clearance space is provided between the two sections of the inner gear rings. When the engagement sleeve moves along the axial direction on the engagement seat, at least one section of the inner gear ring remains in meshing with the external teeth of the engagement seat;

[0005] A plurality of gear driving gears and at least one spline sleeve are provided on the main speed change driving shaft, the gear driving gear close to the meshing sleeve is rotatably sleeved on the spline sleeve or rotatably sleeved on the main speed change driving shaft, and the gear driving gear close to the meshing sleeve is provided with meshing teeth that can mesh with the inner gear ring of the meshing sleeve; the spline sleeve is rotatably sleeved on the main speed change driving shaft, one end of which meshes with the gear driving gear away from the meshing sleeve, and the other end is provided with meshing teeth that can mesh with the inner gear ring of the meshing sleeve; a clearance space is provided between the two sections of the inner gear ring of the meshing sleeve, so that when the meshing sleeve moves to the left or right to shift gears, the inner gear ring of the meshing sleeve can only mesh with the corresponding meshing teeth of the spline sleeve or one of the gear driving gears, thereby avoiding damage caused by meshing multiple gear driving gears or the meshing teeth of the spline sleeve at the same time.

[0006] It also includes a main speed-changing driven shaft for outputting power, on which a plurality of gear driven gears correspondingly meshing with the gear driving gears are fixed.

[0007] As an optimization, it also includes a power input shaft for inputting power to the PTO. The main speed driven shaft is a main speed driven shaft sleeve, which is rotatably coaxially sleeved on the power input shaft and has an outer circle provided with external teeth. The gear driven gear is fixedly sleeved on the main speed driven shaft by meshing with the external teeth.

[0008] As an optimization, there are three gear driving gears, namely, 1st gear driving gear, 2nd gear driving gear, and 3rd gear driving gear. Correspondingly, the gear driven gears include 1st gear driven gear, 2nd gear driven gear, and 3rd gear driven gear. The 1st gear driving gear is arranged on one side of the meshing sleeve, and the spline sleeve is arranged on the other side of the meshing sleeve. The 2nd gear driving gear is engaged with the spline sleeve, and the 3rd gear driving gear is rotatably sleeved on the spline sleeve.

[0009] As an optimization, the end faces of both ends of the engaging sleeve are higher than the outer edge of the inner gear ring near the two ends of the engaging sleeve, so that the two ends of the engaging sleeve form outwardly protruding limit bosses. When the engaging sleeve is engaged with the gear driving gear, the limit bosses can be offset against the end faces of the corresponding gear driving gear or driven gear to form a limit.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The utility model,

[0012] Through the cooperation between the meshing sleeve and the spline sleeve, the meshing sleeve can transmit the gear driving gear to other gear driving gears through the spline sleeve, thereby realizing multi-gear shifting, and there is a clearance space between the corresponding inner gear rings in the meshing sleeve. When switching gears, the inner gear ring of the meshing sleeve can only mesh with the corresponding meshing teeth of the spline sleeve or one of the gear driving gears, and the gear switching is smoother and more accurate. In addition, the structural form of the meshing sleeve is more compact and has higher meshing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle of the utility model;

[0014] Figure 2 It is a structural diagram of the utility model;

[0015] In the figure: 1, power input shaft 2, 2nd gear driven gear 3, 3rd gear driven gear 4, main speed driven shaft sleeve 5, 1st gear driven gear 6, main speed driving shaft 7, 2nd gear driving gear 8, 2nd gear spline sleeve 9, 3rd gear driving gear 10, engagement seat 11, engagement sleeve 12, 1st gear driving gear 13, forward / reverse shift mechanism. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the figures, or the positions or relationships in which the inventive product is typically placed when in use. These terms are intended solely for ease of description and simplification of the present invention and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. Furthermore, terms such as "horizontal" and "vertical" do not imply that a component must be absolutely horizontal or overhanging, but rather may be slightly tilted. For example, "horizontal" simply refers to a direction that is more horizontal than "vertical," and does not imply that the structure must be completely horizontal, but rather may be slightly tilted. It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections 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.

[0019] Example: See Figure 1-Figure 2, a meshing sleeve gear shifting mechanism, including a main speed change driving shaft 6 for inputting power; an engaging seat 10 is provided on the main speed change driving shaft 6, and the engaging seat 10 is provided with external teeth. A meshing sleeve 11 is provided on the engaging seat 10 for moving the mating sleeve, and two sections of inner gear rings are distributed along the axial direction on the inner hole of the engaging sleeve 11, which can mesh with the external teeth on the engaging seat 10. A clearance space is provided between the two sections of inner gear rings. When the engaging sleeve 11 moves along its axial direction on the engaging seat 10, at least one section of the inner gear ring remains in meshing with the external teeth of the engaging seat 10 to ensure the continuity of power input.

[0020] A plurality of gear driving gears and at least one spline sleeve 8 are provided on the main speed change driving shaft 6. The gear driving gear close to the meshing sleeve 11 is rotatably sleeved on the spline sleeve 8 or rotatably sleeved on the main speed change driving shaft 6, and the gear driving gear close to the meshing sleeve 11 is provided with meshing teeth that can mesh with the inner gear ring of the meshing sleeve 11; the spline sleeve 8 is rotatably sleeved on the main speed change driving shaft 6, one end of which meshes with the gear driving gear away from the meshing sleeve 11, and the other end is provided with meshing teeth that can mesh with the inner gear ring of the meshing sleeve 11; a clearance space is provided between the two sections of the inner gear ring of the meshing sleeve 11, so that when the meshing sleeve 11 moves to the left or right to shift gears, the inner gear ring of the meshing sleeve 11 can only mesh with the corresponding meshing teeth of the spline sleeve 8 or one of the gear driving gears, thereby avoiding damage caused by meshing multiple gear driving gears or the meshing teeth of the spline sleeve 8 at the same time.

[0021] It also includes a main speed-changing driven shaft for outputting power, on which a plurality of gear driven gears correspondingly meshing with the gear driving gears are fixed.

[0022] In this way, through the cooperation between the meshing sleeve 11 and the spline sleeve 8, the meshing sleeve 11 can transmit to other gear driving gears through the spline sleeve 8 across the gear driving gear therein, thereby realizing multi-gear shifting, and a clearance space is provided between the corresponding inner gear rings in the meshing sleeve 11, so that when the meshing sleeve 11 moves left or right to shift gears, the inner gear ring of the meshing sleeve 11 can always only mesh with the corresponding meshing teeth of one gear driving gear or the spline sleeve 8, and the gear switching is smoother and more accurate. In addition, the structural form of the meshing sleeve 11 is more compact and has higher meshing accuracy.

[0023] Specifically, in this embodiment, taking the 3-gear switching as an example, there are three gear driving gears, namely the 1st gear driving gear 12, the 2nd gear driving gear 7, and the 3rd gear driving gear 9. Correspondingly, the gear driven gears include the 1st gear driven gear 5, the 2nd gear driven gear 2, and the 3rd gear driven gear 3. The 1st gear active output gear is arranged on one side of the meshing sleeve 11, and the spline sleeve 8 is arranged on the other side of the meshing sleeve 11. The 2nd gear driving gear 7 is meshed with the spline sleeve 8, and the 3rd gear driving gear 9 is rotatably sleeved on the spline sleeve 8.

[0024] It also includes a power input shaft 1 for inputting power to the PTO. The main speed-change driven shaft is a main speed-change driven shaft sleeve 4, which is rotatably coaxially sleeved on the power input shaft 1 and has an outer circle provided with external teeth. The gear driven gear is fixedly sleeved on the main speed-change driven shaft by meshing with the external teeth.

[0025] More specifically, the end faces of both ends of the engaging sleeve 11 are higher than the outer edges of the inner gear rings near the two ends of the engaging sleeve 11, so that outwardly protruding limiting bosses are formed at both ends of the engaging sleeve 11. When the engaging sleeve 11 moves left and right to the distal ends and engages with the gear driving gear in place, the limiting boss can abut against the end face of the corresponding gear driving gear or driven gear to form a rough limit. In this embodiment, when the engaging sleeve 11 moves to the right and engages with the 1st gear driving gear 12, when it is engaged in place, the limiting boss just abuts against the left end face of the 1st gear driven gear 5 to form a rough limit, thereby ensuring that the engaging sleeve 11 can be moved into place at one time when shifting. When the meshing sleeve 11 moves to the left and meshes with the 3rd gear driving gear 9, when the meshing is in place, the limiting boss just abuts against the right end face of the 3rd gear driving gear 9, forming a rough limit, ensuring that the meshing sleeve 11 can move into place at one time when shifting. At the same time, it can also ensure that the meshing teeth on the spline sleeve 8 and the inner gear ring of the meshing sleeve 11 are staggered, thereby achieving rough limit. The precise limit of each gear is achieved by the steel ball structure. This structure is an existing conventional technology and will not be described here.

[0026] While working:

[0027] 1. The power input shaft transmits the engine power to the main transmission drive shaft through the forward / reverse shift mechanism 13 (a traditional structure, not described here in detail), and transmits the power to the engagement seat through the splines on the shaft, and then transmits the power to the engagement sleeve through the outer splines of the engagement seat.

[0028] 2. When the engagement sleeve is in the middle position of the engagement seat, the engagement sleeve is not engaged with any gear and the gear is in neutral position.

[0029] 3. When the engagement sleeve moves rightward from the neutral position to the 1st gear position, the engagement sleeve engages with the 1st gear driving gear, and the power is transmitted to the 1st gear driven gear through the 1st gear driving gear, and then transmitted to the main transmission driven shaft sleeve through its internal spline, and the power is transmitted from the main transmission driven shaft sleeve to the subsequent speed change system.

[0030] 4. When the engagement sleeve moves to the left from the neutral position to the 2nd gear position, the engagement sleeve engages with the 2nd gear spline sleeve, transmitting power to the 2nd gear driving gear. The power is transmitted to the 2nd gear driven gear through the 2nd gear driving gear, and then transmitted to the main transmission driven shaft sleeve through its internal spline. The power is transmitted from the main transmission driven shaft sleeve to the subsequent speed change system.

[0031] 5. When the engagement sleeve moves to the left from the neutral position to the 3rd gear position, the engagement sleeve engages with the 3rd gear driving gear, and the power is transmitted to the 3rd gear driven gear through the 3rd gear driving gear, and then transmitted to the main transmission driven shaft sleeve through its internal spline, and the power is transmitted from the main transmission driven shaft sleeve to the subsequent speed change system.

[0032] 6. The power input shaft transmits power to the PTO power output transmission system through the inner hole of the main transmission driven shaft sleeve. The main transmission driven shaft sleeve is sleeved on the power input shaft and arranged coaxially with the power input shaft, making the structure more compact.

[0033] 7. There is a neutral position between the meshing sleeve and each gear position, that is, when the inner gear ring of the meshing sleeve passes through the spacing between adjacent meshing teeth, it can be completely disengaged from each driving gear to facilitate gear operation.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A gear shift mechanism for a meshing sleeve, characterized by: The main transmission driving shaft is provided with an engagement seat, the engagement seat being provided with external teeth, an engagement sleeve being provided on the engagement seat in a sliding manner, and an inner hole of the engagement sleeve being provided with two sections of inner gear rings distributed along its axial direction and capable of engaging with the external teeth on the engagement seat, with a clearance space being provided between the two sections of the inner gear rings. When the engagement sleeve moves along its axial direction on the engagement seat, at least one section of the inner gear ring remains in engagement with the external teeth of the engagement seat. A plurality of gear driving gears and at least one spline sleeve are provided on the main speed change driving shaft. The gear driving gear close to the meshing sleeve is rotatably sleeved on the spline sleeve or rotatably sleeved on the main speed change driving shaft, and the gear driving gear close to the meshing sleeve is provided with meshing teeth that can mesh with the inner gear ring of the meshing sleeve; the spline sleeve is rotatably sleeved on the main speed change driving shaft, one end of which meshes with the gear driving gear away from the meshing sleeve, and the other end is provided with meshing teeth that can mesh with the inner gear ring of the meshing sleeve; a clearance space is provided between the two sections of the inner gear ring of the meshing sleeve, so that when the meshing sleeve moves left or right to engage in gear, the inner gear ring of the meshing sleeve can always only mesh with the corresponding meshing teeth of the spline sleeve or one of the gear driving gears; It also includes a main speed-changing driven shaft for outputting power, on which a plurality of gear driven gears correspondingly meshing with the gear driving gears are fixed.

2. The gear shift mechanism of the engagement sleeve according to claim 1, characterized in that: It also includes a power input shaft for inputting power to the PTO. The main speed-change driven shaft is a main speed-change driven shaft sleeve, which is rotatably coaxially sleeved on the power input shaft and has an outer circle provided with external teeth. The gear driven gear is fixedly sleeved on the main speed-change driven shaft by meshing with the external teeth.

3. The gear shift mechanism of the engagement sleeve according to claim 2, characterized in that: There are three gear driving gears, namely, a 1st gear driving gear, a 2nd gear driving gear, and a 3rd gear driving gear. Correspondingly, the gear driven gears include a 1st gear driven gear, a 2nd gear driven gear, and a 3rd gear driven gear. The 1st gear driving gear is arranged on one side of the meshing sleeve, and the spline sleeve is arranged on the other side of the meshing sleeve. The 2nd gear driving gear is engaged with the spline sleeve, and the 3rd gear driving gear is rotatably sleeved on the spline sleeve.

4. The gear shift mechanism of the engagement sleeve according to any one of claims 1 to 3, characterized in that: The end faces of both ends of the meshing sleeve are higher than the outer edges of the inner gear rings near the two ends of the meshing sleeve, so that outwardly protruding limiting bosses are formed at both ends of the meshing sleeve. When the meshing sleeve moves left and right to the distal ends and engages with the gear driving gear in place, the limiting bosses can abut against the end faces of the corresponding gear driving gear or driven gear to form a limit.

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