A forward and reverse switching same-direction output gear set

Abstract

The present invention discloses a forward and reverse switching same-direction output gear set, comprising an input gear, wherein the input gear is meshed with a driven gear 1, wherein the driven gear 1 is meshed with at least one idle gear 1, wherein the idle gear 1 is meshed with an idle gear 2, wherein the idle gear 2 is respectively meshed with a driven gear 2 and a common gear, wherein the common gear is meshed with the output gear; wherein the driven gear 2 is coaxially arranged with the driven gear, wherein a plurality of oblique convex teeth are arranged in an annular array on the upper end surface of the driven gear 2, wherein a plurality of grooves corresponding to the oblique convex teeth are arranged on a lower end surface of the driven gear, wherein the driven gear 1 can be disengaged from the idle gear 1 and connected to the driven gear 2, and the common gear is meshed with the output gear; wherein the driven gear 2 is coaxially arranged with the driven gear, wherein a plurality of oblique convex teeth are arranged in an annular array on the upper end surface of the driven gear 2, and a plurality of grooves corresponding to the oblique convex teeth are arranged on the lower end surface of the driven gear; wherein the driven gear 1 can be disengaged from the idle gear 1 and connected to the driven gear 2, and the common gear is meshed with the output gear; wherein the driven gear 2 is coaxially arranged with the driven gear, wherein the driven gear 2 is coaxially arranged with the driven gear, wherein the driven gear 2 is coaxially arranged with the driven gear, wherein the driven gear 2 is coaxially arranged with the driven gear 2 ... The gear shifting is achieved by separating and combining with the inert gear one and the driven gear two through the action of the driven gear one. No matter how the rotation direction of the input gear changes, the output direction of the output gear is always kept unique. In terms of application, the transmission gear is switched by shifting, and the speed ratio between the gears can be readjusted to achieve high speed or high torque switching. In addition, such a structure can use a unified input end to achieve the same or opposite output at two output ends. In actual applications, two input ends are usually required for control. The structure of the present invention can omit one input end, which can reduce the volume and save costs.

Description

Technical Field

[0001] The invention belongs to the field of gear transmission mechanisms, in particular to a forward and reverse switching same-direction output gear set. Background Art

[0002] Gearboxes or torque converters are widely used in power output devices. For example, the specific action process of the Chinese public technical document "CN105697692A, Electric Tool Gearbox Speed ​​Shift Structure" is: through the axial movement of the speed ring gear, when the speed ring gear moves to the position where the clutch outer teeth are engaged with the clutch inner teeth of the second planetary gear assembly, the speed ring gear simultaneously engages the first planetary gear of the first planetary gear assembly and the inner gear of the second planetary gear assembly, and outputs the first speed. When the speed ring gear moves axially to the position where the clutch inner teeth are separated from the clutch outer teeth, the speed ring gear rotates with the first planetary gear.

[0003] In the above technical solution, although switching of different speeds can be achieved, the directions of the input and output ends always need to be kept consistent. For special tools or equipment, the input end needs to be switched forward and reverse. For example, if there are two output ends, the forward and reverse rotation of the input end controls the forward and reverse switching of one of the output ends, and the other output end needs to maintain a unique output direction, which cannot be achieved based on the above solution. Summary of the invention

[0004] The object of the present invention is to provide a forward-reverse switching output gear set in the same direction to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A forward and reverse switching same-direction output gear set, comprising an input gear, the input gear meshing with a driven gear 1, the driven gear 1 meshing with at least one idler gear 1, the idler gear 1 meshing with an idler gear 2, the idler gear 2 respectively meshing with a driven gear 2 and a common gear, the common gear meshing with the output gear;

[0007] The driven gear 2 is coaxially arranged with the driven gear, and a plurality of oblique convex teeth are arranged in a circular array on the upper end surface of the driven gear 2, and a plurality of grooves corresponding to the oblique convex teeth are arranged on the lower end surface of the driven gear. The driven gear 1 can be disengaged from the idler gear 1 and connected to the driven gear 2.

[0008] According to a further technical solution, the driven gear 1 is a duplex gear, the large gear in the duplex gear is meshed with the input gear, the small gear in the duplex gear is meshed with the idler gear 1, and the driven gear 2 is different in size from the small gear in the duplex gear 1.

[0009] According to a further technical solution, the height of the driven gear 1 is less than or equal to the longitudinal distance from the highest end of the oblique convex tooth to the lowest end of the tooth of the idler gear 1.

[0010] According to a further technical solution, the input gear and the large gear in the duplex gear are both helical gears, and their inclination angles are opposite.

[0011] According to a further technical solution, the upper end surface of the large gear in the duplex gears may abut against the upper end surface of the idler gear.

[0012] According to a further technical solution, there are three idle gears, the driven gear one is meshed with one of the idle gears, and the other idle gear one is meshed with a common gear.

[0013] According to a further technical solution, the common gear and the output gear are transmitted via a transition gear.

[0014] Beneficial effects of the present invention:

[0015] The present invention realizes the separation and combination of the idler gear 1 and the driven gear 2 to shift gears through the action of the driven gear 1, and no matter how the rotation direction of the input gear changes, the output gear always maintains the only direction of output;

[0016] In terms of application, the transmission gear is switched by shifting, and the speed ratio between the gears can be readjusted to achieve switching of high speed or high torque. In addition, the output gear of the present invention can still maintain the original output direction by switching gears. At this time, the output directions of the two output ends are opposite. Through such a structure, a unified input end can be used to achieve the same or opposite output of the two output ends. In actual applications, two input ends are usually required for control. The structure of the present invention can omit one input end, which can reduce the volume and save costs.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : The three-dimensional structure of the present invention Figure 1 .

[0019] Figure 2 : The three-dimensional structure of the present invention Figure 2 .

[0020] Figure 3 :The main view of the present invention Figure 1 .

[0021] Figure 4 : Schematic diagram of counterclockwise rotation of the input of the present invention.

[0022] Figure 5 :The main view of the present invention Figure 2 .

[0023] Figure 6 : Schematic diagram of clockwise rotation of input of the present invention.

[0024] Figure 7 : The driven gear 1, the driven gear 2 and the idler gear 1 of the present invention are distributed Figure 1 .

[0025] Figure 8 : The driven gear 1, the driven gear 2 and the idler gear 1 of the present invention are distributed Figure 2 .

[0026] Figure numerals: 1-input gear, 2-driven gear 1, 22-large gear, 21-small gear, 23-groove, 3-idle gear 1, 4-idle gear 2, 51-driven gear 2, 52-oblique convex tooth, 6-common gear, 7-output gear, 8-transition gear. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Please refer to Figure 1-8 ;

[0029] The gear set described in the present invention can realize the only output direction of the output end when the input end is in forward rotation or reverse rotation, and specifically includes an input gear 1, the input gear 1 is meshed with a driven gear 2, the driven gear 2 is meshed with at least one idle gear 3, and the idle gear 3 is meshed with an idle gear 2 4. In this embodiment, the number of idle gears 1 3 and idle gear 2 4 is not directly related, but the number of idle gears 1 3 and idle gear 2 4 is different, which will affect the rotation direction of the common gear 6, that is, it will eventually affect the rotation direction of the output gear 7. Therefore, the number of idle gears 1 3 and idle gear 2 4 is reasonably set according to the rotation direction of the output gear 7. In this embodiment, the number of idle gears 1 3 is three, and the number of idle gears 2 4 is one. Of course, different sizes of gears can also be selected from the three idle gears 3, which will affect the torque output. It can be specifically set according to the situation of the existing technology and will not cause the principle problem in this application;

[0030] The idler gear 2 4 is respectively meshed with the driven gear 2 51 and the common gear 6, and the common gear 6 is meshed with the output gear 7; the driven gear 2 51 is coaxially arranged with the driven gear 1 2, and a plurality of oblique convex teeth 52 are arranged in a circular array on the upper end surface of the driven gear 2 51, and a plurality of grooves 23 corresponding to the oblique convex teeth 52 are arranged on the lower end surface of the driven gear 1 2; preferably, the shape of the grooves 23 is adapted to the oblique convex teeth 52;

[0031] It should be noted that the specific principle of the present invention is to achieve the shifting of the gear position by the up and down movement of the driven gear 1 2, and the positions of other gears are fixed. The specific fixing method can be to achieve the position fixing by penetrating a rotating shaft and connecting the rotating shaft to the housing; the input gear 1 is described as rotating clockwise as the initial state, and the rotation direction of each gear is as follows:

[0032] Reference Figure 3 and Figure 4 , the input gear 1 rotates counterclockwise, the driven gear 2 rotates clockwise, the idler gear 3 rotates counterclockwise, the idler gear 4 rotates clockwise, the driven gear 51 rotates counterclockwise, the common gear 6 rotates counterclockwise, and the output gear 7 rotates clockwise. At this time, the rotation direction of the output gear 7 is opposite to that of the input gear 1. If a transition gear 8 is set between the common gear 6 and the output gear 7, the output gear 7 rotates counterclockwise. At this time, the output gear 7 has the same rotation direction as the input gear 1. The specific setting can be referred to the actual situation;

[0033] During the above-mentioned action process, the input gear 1 is only meshed with the driven gear 1 2, and the driven gear 2 51 is not directly connected to the input gear 1, but is driven to rotate through the inert gear 2 4. At this time, the driven gear 2 51 is in a passive state and will not affect the rotation direction. The driven gear 1 2 and the driven gear 2 51 are both passed through by the same rotating shaft to ensure their coaxial relationship.

[0034] When the input gear 1 needs to be reversed, in order to maintain the rotation direction of the output gear 7, a gear switching action is required. First, a force in the direction of the driven gear 2 51 is applied to the driven gear 1 2 to make it move along the rotation axis in the direction of the driven gear 2 51, and finally the oblique convex tooth 52 is embedded in the groove 23. At this time, the driven gear 1 2 and the driven gear 2 51 are connected, while the driven gear 1 2 and the idler gear are in a separated state. Of course, the axial length of the input gear 1 is relatively large, so the driven gear 1 2 can still maintain a meshing state with the input gear 1 after moving;

[0035] Reference 5 and Figure 6, at this time, the input gear 1 rotates clockwise, the driven gear 2 rotates counterclockwise, the driven gear 2 51 follows the driven gear 2 51 to rotate counterclockwise, the idler gear 2 4 rotates clockwise, the idler gear 1 3 rotates counterclockwise, the common gear 6 rotates counterclockwise, and the output gear 7 rotates clockwise. At this time, the rotation direction of the output gear 7 is the same as that of the input gear 1. If a transition gear 8 is set between the common gear 6 and the output gear 7, the output gear 7 rotates counterclockwise. At this time, the rotation direction of the output gear 7 is opposite to that of the input gear 1. The specific setting can be referred to the actual situation. In this process, the driven gear 2 51 is combined with the driven gear 2 to form a whole. As a part of the power transmission, driven by the driven gear 2, the driven gear 2 51 transmits power to the idler gear 2 4. At this time, the idler gear 3 is in a passive state. It can be seen from the above-mentioned action principle that by switching the gear position, it can be achieved that no matter what the rotation direction of the input gear 1 is, the output gear 7 can still maintain the same direction of rotation.

[0036] In one application method based on the above principle, the sizes of the driven gear 1 2 and the driven gear 2 51 are different, so that the transmission ratios of the two outputs are different. The transmission gears are switched by shifting, and the speed ratio between the gears can be readjusted to achieve high speed or high torque switching.

[0037] Preferably, the driven gear 1 2 is a duplex gear, the large gear 22 in the duplex gear is meshed with the input gear 1 , the small gear 21 in the duplex gear is meshed with the idler gear 1 3 , and the driven gear 2 51 is different in size from the small gear 21 in the duplex gear 1 .

[0038] Another application method is to assume that the device has two output ends, one of which needs to maintain a single direction of output, while the other output end needs to run in forward and reverse directions. At this time, the gear set in the present invention can be used, and the gear related to the other output end is meshed with the input gear 1. When the input gear 1 rotates clockwise, the two output ends rotate in the same direction, and at this time they are in the same output direction. When one of the output ends needs to output in the opposite direction, the input gear 1 rotates in the opposite direction, driving the output end to rotate in the opposite direction. The output gear 7 of the present invention can still maintain the original output direction by switching gears. At this time, the output directions of the two output ends are opposite. Through such a structure, a unified input end can be used to achieve the same or opposite output of the two output ends. In actual applications, two input ends are usually required to be set for control. The structure of the present invention can omit one input end, which can reduce the volume and save costs.

[0039] The present invention describes the switching method of the driven gear 2;

[0040] Switching method one, in the initial state, the driven gear 2 is meshed with the idler gear 3. When switching is required, first stop the input end action, and then manually push the driven gear 2 toward the driven gear 2 51 by external force. Even if the oblique convex tooth 52 does not completely correspond to the groove 23, the characteristics of the oblique convex tooth 52 can also make the driven gear 2 51 rotate slightly, so that the oblique convex tooth 52 is gradually embedded in the groove 23 to be fixed. When it is necessary to switch to the initial state, the driven gear 2 is pushed away from the driven gear 2 51 by the switching method, so that the oblique convex tooth 52 is disengaged from the groove 23, and the driven gear 2 is meshed with the idler gear 3 again. It should be noted that when the driven gear 2 and the idler gear 3 are in a separated state, the idler gear 3 will still rotate, and maintain the relative state with the driven gear 2 in turn, so that it can ensure re-engagement during the switching process.

[0041] Switching mode 2, the input gear 1 and the large gear 22 in the double gear are both helical gears, and the inclination angles of the two are opposite. When the input gear 1 rotates clockwise, the input gear 1 and the large gear 22 will have a longitudinal relative displacement. Since the position of the input gear 1 is fixed, the double gear has a tendency to move away from the driven gear 2 51, so that it will not contact the driven gear 2 51 and maintain a meshing state with the idler gear 1 3. When the input gear 1 rotates counterclockwise, due to the characteristics of the helical gear, the direction of the relative position of the input gear 1 and the large gear 22 changes, and the double gear closes. The force in the direction of the driven gear 2 51 causes it to move downward during the rotation. When the pinion 21 disengages from the idler gear 1 3, the oblique convex tooth 52 does not immediately enter the groove 23. At this time, the entire gear set is in a paused state. This is a very short moment to avoid the problem of jamming caused by inconsistent transmission direction. Preferably, the height of the driven gear 2 is less than or equal to the longitudinal distance from the highest end of the oblique convex tooth 52 to the lowest end of the idler gear 3 tooth. Then the double gear continues to move in the direction of the driven gear 2 51, so that the oblique convex tooth 52 enters the groove 23 to realize gear switching.

[0042] Furthermore, the upper end surface of the large gear 22 in the double gear can contact the upper end surface of the idle gear. When the small gear 21 is meshed with the idle gear 13 for transmission, the double gear can be prevented from continuing to move, thereby achieving a limiting effect.

[0043] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A forward and reverse switching same-direction output gear set, characterized in that: The invention comprises an input gear (1), wherein the input gear (1) is meshed with a driven gear 1 (2), wherein the driven gear 1 (2) is meshed with at least one idle gear 1 (3), wherein the idle gear 1 (3) is meshed with an idle gear 2 (4), wherein the idle gear 2 (4) is respectively meshed with a driven gear 2 (51) and a common gear (6), and wherein the common gear (6) is meshed with an output gear (7); The driven gear 2 (51) is coaxially arranged with the driven gear 1 (2), a plurality of oblique convex teeth (52) are arranged in an annular array on the upper end surface of the driven gear 2 (51), a plurality of grooves (23) corresponding to the oblique convex teeth (52) are arranged on the lower end surface of the driven gear 1 (2), and the driven gear 1 (2) can be separated from the idler gear 1 (3) and connected to the driven gear 2 (51); The driven gear 1 (2) is a double gear, the large gear (22) in the double gear meshes with the input gear (1), the small gear (21) in the double gear meshes with the idler gear 1 (3), the driven gear 2 (51) and the small gear (21) in the double gear 1 are different in size, the input gear (1) and the large gear (22) in the double gear are both helical gears, and the inclination angles of the two are opposite; The input gear (1) rotates counterclockwise, and the large gear (22) moves downward relatively, so that the small gear (21) is separated from the idler gear 1 (3), and the oblique convex teeth (52) enter the groove (23) to make the large gear (22) and the driven gear 2 (51) transmit; The input gear (1) rotates clockwise, the large gear (22) moves upward relatively, the oblique convex teeth (52) separate from the grooves (23), so that the transmission between the large gear (22) and the driven gear 2 (51) is disconnected, and the small gear (21) is meshed with the idler gear 1 (3).

2. The forward and reverse switching same-direction output gear set according to claim 1, characterized in that: The height of the driven gear 1 (2) is less than or equal to the longitudinal distance from the highest end of the oblique convex tooth (52) to the lowest end of the tooth of the idler gear 1 (3).

3. The forward and reverse switching same-direction output gear set according to claim 1, characterized in that: The upper end surface of the large gear (22) in the double gear can collide with the upper end surface of the idler gear.

4. The forward and reverse switching same-direction output gear set according to claim 1, characterized in that: There are three idler gears (3), the driven gear (2) is meshed with one of the idler gears, and the other idler gear (3) is meshed with a common gear (6).

5. The forward and reverse switching same-direction output gear set according to claim 1, characterized in that: The common gear (6) and the output gear (7) are transmitted via a transition gear (8).

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