Planet carrier, high-pressure cleaning machine and electric tool

Abstract

The utility model relates to a planet carrier, a high-pressure cleaning machine and an electric tool, and the planet carrier comprises a first installation part which is provided with a center hole used for outputting torque; the second mounting parts are provided with mounting holes for mounting planet gears; the first surface wall of the first mounting part back to the planet wheel is higher than the first surface of the second mounting part back to the planet wheel; one end of each connecting arm is connected to the first mounting part, and the other end of each connecting arm is connected to the second mounting part in a one-to-one matching manner; wherein the connecting arm at least comprises an inclined connecting part, the first end of the inclined connecting part is connected to the first mounting part, and the second end of the inclined connecting part is connected to the second mounting part; the inclined connecting part extends from the second end to the first end in the direction towards the first surface wall. According to the planet carrier, the structure of the connecting arm of the planet carrier is optimized, the inclined connecting part is arranged on the connecting arm, and the inclined direction of the inclined connecting part is limited, so that the deformation resistance of the connecting arm can be improved, and the light-weight design of the planet carrier is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary carriers, in particular to a planetary carrier, a high-pressure cleaning machine and an electric tool. Background Art

[0002] A high-pressure cleaner uses a transmission mechanism to drive a high-pressure plunger pump, converting ordinary water into a high-pressure stream. This high-pressure stream is then converted into a high-speed jet through a high-pressure nozzle, using the impact force of the high-speed jet to remove dirt and debris from surfaces. The transmission mechanism includes a gear assembly for speed reduction, which consists of a sun gear, planetary gears, and a planetary carrier for mounting the planetary gears.

[0003] like Figure 1A As shown, the planet carrier 1a includes a first through hole 11a and three second through holes 12a. The first through hole 11a and the second through holes 12a are connected by a lever arm 13a. The front wall surface 131a and the rear wall surface of the lever arm 13a are both planes. Figure 1B As shown, the planetary gear is mounted on the second through hole 12a via the pin 2a, and the first through hole 11a is used to output torque. Figure 1B As shown, when the planetary gear Figure 1B When the counterclockwise rotation is performed, according to the force translation theorem, the second through hole 12a is subjected to the force transmitted by the latch 2a as follows: Figure 1B Said, includes a force vector F and a moment M, where, as Figure 1C As shown, the force vector F on the second through hole 12a causes the second through hole 12a to have a displacement trend S1 of circular motion around the first through hole 11a, as shown in FIG. Figure 1D As shown, the moment M applied to the second through hole 12a causes the second through hole 12a to have a displacement trend S2 of flipping movement, as shown in FIG. Figure 1E As shown, the vector sum r of these two displacement trends is necessarily along an oblique direction, which causes the second through-hole 12a to exert a force on the lever arm 13a, forcing the lever arm 13a to bend. Generally, when a material is primarily subjected to tensile or compressive forces, it is more resistant to deformation. When subjected to bending forces, the material's resistance to deformation is slightly weaker. Due to the moment M, the second through-hole 12a generates a tilting displacement trend S2, forcing the lever arm 13a to bend. To prevent this deformation, the thickness of the lever arm 13a must usually be increased, which is detrimental to the lightweight design of the planetary carrier. Utility Model Content

[0004] Based on the above-mentioned defects in the prior art, the purpose of the present invention is to provide a planetary carrier, to optimize the structure of the connecting arm of the planetary carrier, and to improve the deformation resistance of the connecting arm by providing an inclined connecting portion on the connecting arm and limiting the inclination direction of the inclined connecting portion, while also being conducive to the lightweight design of the planetary carrier.

[0005] To this end, the present invention provides the following technical solutions.

[0006] The utility model provides a planet carrier, which includes:

[0007] A first mounting portion having a central hole for outputting torque;

[0008] a plurality of second mounting portions arranged around the central hole, each second mounting portion having a mounting hole for mounting a planetary gear; a first surface wall of the first mounting portion facing away from the planetary gear being higher than a first surface of the second mounting portion facing away from the planetary gear;

[0009] a plurality of connecting arms, one end of each connecting arm being connected to the first mounting portion, and the other end of each connecting arm being connected to the second mounting portion in a one-to-one matching manner;

[0010] Wherein, the connecting arm includes at least an inclined connecting portion, a first end of the inclined connecting portion is connected to the first mounting portion, and a second end thereof is connected to the second mounting portion; the inclined connecting portion extends from the second end to the first end in a direction toward the first surface wall.

[0011] Optionally, the connecting arm further includes a flat plate connecting portion, two ends of which are respectively connected to the first mounting portion and the second mounting portion, and the flat plate connecting portion extends radially along the mounting hole.

[0012] Optionally, the connecting arm has two inclined connecting portions, and the two inclined connecting portions are respectively connected to two sides of the flat plate connecting portion.

[0013] Optionally, a dimension of the flat connecting portion in the axial direction of the mounting hole is smaller than a dimension of the inclined connecting portion in the axial direction of the mounting hole.

[0014] Optionally, the axial dimension of the second end of the inclined connection portion in the mounting hole is equal to the axial dimension of the second mounting portion in the mounting hole, and the end surface of the second end is completely connected to the circumferential surface wall of the second mounting portion.

[0015] Optionally, the two inclined connection portions located between the two second mounting portions are connected.

[0016] Optionally, the width of the first end of the inclined connection portion is smaller than the width of the second end.

[0017] Optionally, the two inclined connecting portions are connected to form a V-shaped structure, the outer wall at the tip of the V-shaped structure constitutes a first transition arc surface, and the inner wall at the tip of the V-shaped structure constitutes a second transition arc surface.

[0018] The utility model also provides a high-pressure cleaning machine, which includes the planetary carrier described above.

[0019] The utility model also provides an electric tool, which includes the planetary carrier described above.

[0020] The utility model has the following technical effects:

[0021] The present invention provides a planetary carrier, comprising a first mounting portion, a second mounting portion, and a connecting arm for connecting the first mounting portion and the second mounting portion. An inclined connecting portion is provided on the connecting arm, and an inclination direction of the inclined connecting portion is defined. When the planetary gear drives the planetary pin to rotate, the planetary pin exerts a force on the hole wall of the mounting hole, causing the displacement trend of the second mounting portion to be along the inclination direction. At this time, the force exerted by the second mounting portion on the inclined connecting portion is mainly along the extension direction of the inclined connecting portion. Therefore, the inclined connecting portion can better suppress the displacement trend of the second mounting portion in the inclination direction and has better resistance to deformation. Compared with the structural design of the lever arm in the prior art, the connecting arm has better resistance to deformation. Compared with the solution of only increasing the thickness of the lever arm to improve its resistance to deformation, the connecting arm can use less material, which is conducive to the lightweight design of the planetary carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A It is a schematic diagram of the three-dimensional structure of a planet carrier in the prior art;

[0023] Figure 1B This is a schematic diagram of the force applied to the planet carrier when the latch rotates in the prior art;

[0024] Figure 1C Schematic diagram of the displacement trend of the second through hole of the planet carrier having a circular motion in the prior art;

[0025] Figure 1D A schematic diagram showing a displacement trend of the second through hole of the planet carrier in the prior art showing a flipping movement;

[0026] Figure 1E A schematic diagram of the vector sum of two displacement trends generated by the second through hole of the planet carrier in the prior art;

[0027] Figure 2 This is a three-dimensional diagram of the assembly structure of the speed reduction mechanism and the shaft structure of the utility model;

[0028] Figure 3 This is a three-dimensional cross-sectional view of the assembly structure of the speed reduction mechanism and the shaft structure of the utility model;

[0029] Figure 4 FIG1 is a perspective view of the assembly structure of the planet carrier, planet pin and shaft structure of the present invention;

[0030] Figure 5 This is a side view of the assembly structure of the planet carrier, planet pin and shaft structure of the utility model;

[0031] Figure 6 This is a three-dimensional diagram of the assembly structure of the planetary carrier, planetary pin and shaft structure of the utility model Figure 2 ;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the planetary pin of the present utility model;

[0033] Figure 8 This is a three-dimensional cross-sectional view of the planetary pin of the present utility model;

[0034] Figure 9 It is a bottom view of the planetary pin of the present utility model.

[0035] Description of Reference Numerals

[0036] 100. Speed ​​reduction mechanism;

[0037] 1. Planet carrier; 11. First mounting portion; 111. Center hole; 112. First surface wall; 12. Second mounting portion; 121. Mounting hole; 122. First surface; 13. Connecting arm; 131. Inclined connecting portion; 1311. First end; 1312. Second end; 132. Flat connecting portion; 133. First transition arc surface; 134. Second transition arc surface;

[0038] 2. Planetary gear;

[0039] 3. Planetary pin;

[0040] 4. Internal gear ring;

[0041] 200, shaft structure;

[0042] 1a, planet carrier; 11a, first through hole; 12a, second through hole; 13a, lever arm; 131a, front wall; 2a, latch. DETAILED DESCRIPTION

[0043] To make the technical solutions and beneficial effects of the present invention more clearly understood, the following describes the present invention in detail by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0044] In the description of the present invention, unless otherwise expressly defined, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of simplifying the description of the present invention, and do not indicate that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation to the present invention.

[0045] In this utility model, the terms "first" and "second" are used solely for descriptive clarity and should not be construed as indicating the relative importance of the features indicated or the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, and "several" means at least one, unless expressly specified otherwise.

[0046] In this utility model, unless otherwise expressly defined, the terms "install," "connect," "connect," "fix," "dispose," etc. should be understood broadly. For example, "connection" can mean fixed connection, detachable connection, or integral molding; it can be mechanical or electrical; it can be direct connection or indirect connection through an intermediary; it can also refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0047] In the present invention, unless otherwise clearly defined, when a first feature is “on,” “above,” “above,” “above,” “below,” “below,” or “below” a second feature, the first feature and the second feature may be in direct contact, or the first feature and the second feature may be in indirect contact via an intermediate medium. Moreover, when a first feature is “on,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0048] The following is based on Figures 2 to 9 The speed reduction mechanism of the present invention is described in detail.

[0049] In this embodiment, if Figures 2 to 8As shown, the reduction mechanism 100 includes a planetary carrier 1, a sun gear (not shown in the figure), a plurality of planetary gears 2, a plurality of planetary pins 3 and an inner ring gear 4. The planetary carrier 1 includes a first mounting portion 11, a plurality of second mounting portions 12 and a plurality of connecting arms 13. One end of the connecting arm 13 is connected to the first mounting portion 11, and the other end of the connecting arm 13 is matched and connected to the second mounting portion 12 one by one. The first mounting portion 11 is provided with a center hole 111 for outputting torque. All the second mounting portions 12 are arranged in a circular array and are arranged around the center hole 111. The second mounting portion 12 is provided with a mounting hole 121. The planetary gears 2 are installed in a one-to-one correspondence with the mounting holes 121, and the planetary gears 2 are installed in the corresponding mounting holes 121 through the planetary pins 3. The planetary gears 2 are respectively engaged with the sun gear and the inner ring gear 4.

[0050] like Figure 2 、 Figure 4 and Figure 7 As shown, the first surface wall 112 of the first mounting portion 11 facing away from the planetary gear 2 is higher than the first surface 122 of the second mounting portion 12 facing away from the planetary gear 2, and the connecting arm 13 includes at least an inclined connecting portion 131, a first end 1311 of the inclined connecting portion 131 is connected to the first mounting portion 11, and a second end 1312 of the inclined connecting portion 131 is connected to the second mounting portion 12; the inclined connecting portion 131 extends from the second end 1312 in a direction toward the first surface wall 112 to the first end 1311.

[0051] In the above technical solution, the structure of the planetary carrier 1 is optimized, and an inclined connection portion 131 is provided on the connecting arm 13. The inclined direction of the inclined connection portion 131 is defined. When the planetary gear 2 drives the planetary pin 3 to rotate, the planetary pin 3 applies a force on the wall of the mounting hole 121, causing the displacement trend of the second mounting portion 12 to be along the inclined direction. At this time, the force exerted by the second mounting portion 12 on the inclined connection portion 131 is mainly along the extension direction of the inclined connection portion 131. Therefore, the inclined connection portion 131 can better suppress the displacement trend of the second mounting portion 12 in the inclined direction. Compared with the structural design of the lever arm 13a in the prior art, the connecting arm 13 has better deformation resistance. Compared with the solution of simply increasing the thickness of the lever arm 13a to improve its deformation resistance, the connecting arm 13 can use less material, which is conducive to the lightweight design of the planetary carrier 1.

[0052] In one embodiment, if Figure 2 and Figure 7 As shown, there are three second mounting portions 12 and three connecting arms 13 , and the planet carrier 1 can mount three planetary gears 2 . Of course, the number of second mounting portions 12 and three connecting arms 13 is not limited thereto and can be adjusted according to the number of planetary gears 2 required for installation.

[0053] In one embodiment, if Figure 2 and Figure 7 As shown, the connecting arm 13 further includes a flat connecting portion 132, the two ends of which are respectively connected to the first mounting portion 11 and the second mounting portion 12, and the flat connecting portion 132 extends radially along the mounting hole 121. By configuring the flat connecting portion 132, the weight of the planet carrier 1 is reduced.

[0054] Further, if Figure 2 and Figure 7 As shown, the connecting arm 13 has two inclined connecting parts 131, and the two inclined connecting parts 131 are respectively connected to the two sides of the flat plate connecting part 132. In this way, when the second mounting part 12 applies a force to the connecting arm 13, the two inclined connecting parts 131 are subjected to the force in a concentrated manner, which can effectively suppress the flipping displacement tendency of the second mounting part 12. In addition, the two inclined connecting parts 131 protect both sides of the flat plate connecting part 132, reducing the influence of the flipping displacement tendency of the second mounting part 12 on the flat plate connecting part 132, and avoiding deformation of the flat plate connecting part 132.

[0055] In one embodiment, if Figures 6 to 8 As shown, the axial dimension (ie, thickness) of the flat connecting portion 132 in the mounting hole 121 is smaller than the axial dimension of the inclined connecting portion 131 in the mounting hole 121 . By reducing the thickness of the flat connecting portion 132 , the weight of the planet carrier 1 is further reduced.

[0056] In one embodiment, if Figure 6 and Figure 7 As shown, the dimension of the second end 1312 of the inclined connection portion 131 in the axial direction of the mounting hole 121 is equal to the dimension of the second mounting portion 12 in the axial direction of the mounting hole 121, and the end surface of the second end 1312 is completely connected to the circumferential surface wall of the second mounting portion 12, so that the inclined connection portion 131 can better withstand the force generated by the tilting displacement tendency of the second mounting portion 12. It should be understood that the second mounting portion 12 is annular or substantially annular, the circumferential outer wall of the second mounting portion 12 constitutes the circumferential surface wall of the second mounting portion 12, and the hole wall of the mounting hole 121 constitutes the circumferential inner wall of the second mounting portion 12.

[0057] In one embodiment, if Figure 6 and Figure 7 As shown, the two inclined connection parts 131 located between the two second mounting parts 12 are connected, so that the inclined connection parts 131 can better suppress the displacement tendency of the second mounting part 12 in the inclined direction.

[0058] Further, if Figure 6 and Figure 9As shown, the width W1 of the first end 1311 of the inclined connection part 131 is smaller than the width W2 of the second end 1312. Since the two inclined connection parts 131 located between the two second mounting parts 12 are connected, it is ensured that the inclined connection part 131 has good deformation resistance, so as to effectively suppress the displacement tendency of the second mounting part 12 in the inclined direction. On this basis, reducing the width of the second end 1312 is conducive to the lightweight design of the planetary carrier 1.

[0059] Further, if Figure 6 and Figure 7 As shown, two inclined connecting portions 131 are connected to form a V-shaped structure. The outer wall at the tip of the V-shaped structure constitutes a first transition arc surface 133, and the inner wall at the tip of the V-shaped structure constitutes a second transition arc surface 134. The use of arc surface transition at the two inclined connecting portions 131 can reduce stress concentration. It should be understood that the "outer wall at the tip" refers to the outer wall at the V-shaped corner of the V-shaped structure, and the "inner wall at the tip" refers to the wall surface at the V-shaped groove of the V-shaped structure. In addition, the outer wall at the tip and the inner wall at the tip are relative to each other or approximately relative to each other in the axial direction of the center hole 111.

[0060] The present utility model also provides a high-pressure cleaning machine, which (not shown in the figure) includes a motor (not shown in the figure) and the reduction mechanism 100 as described above. The center hole 111 of the planetary carrier 1 is connected to the shaft structure 200 of the relevant components, and the motor drives the shaft structure 200 to rotate through the reduction mechanism 100.

[0061] The present invention also provides an electric tool, an electric tool high-pressure cleaner (not shown in the figure) comprising a motor and the reduction mechanism 100 as described above, the center hole 111 of the planetary carrier 1 is connected to the output shaft of the electric tool, and the motor drives the output shaft to rotate through the reduction mechanism 100.

[0062] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations of the claims. Various modifications and variations may be made to the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form additional embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments merely illustrate several implementations of the present invention and do not limit the scope of protection of the present utility model patent.

Claims

1. A planet carrier, characterized in that: The planet carrier (1) comprises: A first mounting portion (11) is provided with a central hole (111) for outputting torque; A plurality of second mounting portions (12) are arranged around the central hole (111), and the second mounting portions (12) are provided with mounting holes (121) for mounting the planetary gear (2); a first surface wall (112) of the first mounting portion (11) facing away from the planetary gear (2) is higher than a first surface (122) of the second mounting portion (12) facing away from the planetary gear (2); a plurality of connecting arms (13), one end of each connecting arm (13) being connected to the first mounting portion (11), and the other end being connected to the second mounting portion (12) in a one-to-one matching manner; Wherein, the connecting arm (13) at least includes an inclined connecting portion (131), a first end (1311) of the inclined connecting portion (131) is connected to the first mounting portion (11), and a second end (1312) thereof is connected to the second mounting portion (12); the inclined connecting portion (131) extends from the second end (1312) in a direction toward the first surface wall (112) to the first end (1311).

2. The planet carrier according to claim 1, characterized in that The connecting arm (13) further comprises a flat plate connecting portion (132), two ends of which are respectively connected to the first mounting portion (11) and the second mounting portion (12), and the flat plate connecting portion (132) extends radially along the mounting hole (121).

3. The planet carrier according to claim 2, characterized in that The connecting arm (13) has two inclined connecting parts (131), and the two inclined connecting parts (131) are respectively connected to two sides of the flat plate connecting part (132).

4. The planet carrier according to claim 3, characterized in that The dimension of the flat plate connection portion (132) in the axial direction of the mounting hole (121) is smaller than the dimension of the inclined connection portion (131) in the axial direction of the mounting hole (121).

5. The planet carrier according to claim 3, characterized in that: The dimension of the second end (1312) of the inclined connecting portion (131) in the axial direction of the mounting hole (121) is equal to the dimension of the second mounting portion (12) in the axial direction of the mounting hole (121), and the end surface of the second end (1312) is completely connected to the circumferential surface wall of the second mounting portion (12).

6. The planet carrier according to claim 3, characterized in that The two inclined connection parts (131) located between the two second mounting parts (12) are connected.

7. The planet carrier according to claim 6, characterized in that The width of the first end (1311) of the inclined connection portion (131) is smaller than the width of the second end (1312).

8. The planet carrier according to claim 6, characterized in that The two inclined connecting portions (131) are connected to form a V-shaped structure, the outer wall at the tip of the V-shaped structure forms a first transition arc surface (133), and the inner wall at the tip of the V-shaped structure forms a second transition arc surface (134).

9. A high-pressure cleaning machine, characterized in that: The high-pressure cleaning machine comprises a planet carrier according to any one of claims 1 to 8.

10. An electric tool, characterized in that: The electric tool comprises a planet carrier as claimed in any one of claims 1 to 8.

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