Self-propelled speed regulating assembly and garden machinery

Abstract

The application discloses a self-walking speed regulating assembly and garden machinery, wherein the garden machinery is provided with the self-walking speed regulating assembly. The self-walking speed regulating assembly comprises a speed regulating box as a shell, a first gear, a first gear, a rotating rod, a signal device and a constant speed mechanism arranged in the speed regulating box. The constant speed mechanism is movable relative to the axial direction of the rotating rod, is used for limiting the rotation of the first gear and realizes the fixation of the output signal value of the signal device to the driving motor. In addition, the rotating rod has a certain rotation range under the action of a certain external force in the case that the first gear is limited, so that the adjustment of the signal value of the driving motor is realized.

Description

Technical Field

[0001] This invention relates to the field of garden machinery speed regulation, specifically to a self-propelled speed regulation component and garden machinery. Background Technology

[0002] Many garden machines on the market now have a self-propelled mode, such as lawnmowers and snowplows.

[0003] However, there are still many problems with adjusting the speed of the self-driving function, which reduces the user experience.

[0004] On the one hand, the cruise control function in auto mode either has too few cruise control gears or the cruise control operation is not very convenient.

[0005] On the other hand, once the speed of garden machinery is fixed, when users need to accelerate or decelerate, i.e., when the speed of garden machinery needs to be adjusted again, existing solutions have problems such as complicated operation or complex speed adjustment component structure. Summary of the Invention

[0006] To at least partially address the shortcomings of the prior art, this invention provides a self-propelled speed control component. With this component installed, garden machinery can be easily operated for self-propelled constant speed and speed adjustment.

[0007] The self-propelled speed control assembly includes: a speed control box, a rotating rod and a signal device disposed within the speed control box; a first gear protruding outward is provided on the circumference of the rotating rod, and the rotation of the rotating rod around its axis drives the first gear to rotate, with the first gear and a second gear meshing; the signal device is connected to the second gear, and the rotation of the second gear adjusts the output signal of the signal device; a speed control mechanism, part of which is disposed within the speed control box; the speed control mechanism is movable relative to the axial direction of the rotating rod, used to limit the rotation of the first gear or release the restriction on the first gear.

[0008] Furthermore, the speed control mechanism includes a male buckle, which is disposed in the speed control box; multiple slots are provided on the side of the first gear, and the slots are adapted to the male buckle; the speed control mechanism moves between a first position and a second position in the axial direction of the rotating rod, and when the speed control mechanism is in the first position, the male buckle extends into the slot, and when the speed control mechanism is in the second position, the male buckle disengages from the slot.

[0009] Furthermore, the speed control mechanism includes a male buckle, which is disposed inside the speed control box; multiple slots are provided on the side of the first gear, and the slots are adapted to the male buckle; after the male buckle extends into the slot, the speed control mechanism restricts the rotation of the first gear; after the male buckle disengages from the slot, the speed control mechanism releases the restriction on the rotation of the first gear.

[0010] Furthermore, the male buckle includes a hook-shaped portion, which extends into the slot when the speed-regulating mechanism is in the first position; the portion of the hook-shaped portion extending into the slot includes a first insertion surface and a second insertion surface, the contact surface between the slot and the first insertion surface is a first slot wall, and the contact surface between the slot and the second insertion surface is a second slot wall; the first slot wall and the first insertion surface are adapted to each other, and the second slot wall and the second insertion surface are adapted to each other.

[0011] Furthermore, the first insertion surface and / or the second insertion surface are guide surfaces; the guide surfaces are used to guide the hook-shaped portion out of the slot when the constant speed mechanism is in the first position and the rotating rod is rotated.

[0012] Furthermore, the speed control mechanism includes a speed control knob and a speed control block. The speed control block is located below the speed control knob and is disposed inside the speed control box. The male buckle is connected to the speed control block and is located below the speed control block. The speed control knob is at least partially exposed outside the speed control box and is used to drive the speed control block to move in the axial direction relative to the rotating rod.

[0013] Furthermore, the speed-regulating mechanism includes two male buckles, which are housed within the speed control box and are designated as a first male buckle and a second male buckle. The first gear has multiple first slots on its side, which are adapted to the first male buckles. The rotating rod also has an outwardly protruding first protrusion on its circumferential direction, with the first protrusion and the first gear located on opposite sides of the rotating rod. The first protrusion has multiple second slots on its side, which are adapted to the second male buckles. The speed-regulating mechanism moves between a first position and a second position in the axial direction of the rotating rod. When the speed-regulating mechanism is in the first position, the first male buckle extends into the first slot, and the second male buckle extends into the second slot. When the speed-regulating mechanism is in the second position, the first male buckle disengages from the first slot, and the second male buckle disengages from the second slot.

[0014] Furthermore, the rotating rod is provided with a stop portion, and the speed control box is provided with a stop portion; the stop portion and the stop portion are configured to limit the rotational freedom of the rotating rod around its axis; both ends of the rotating rod extend outward to the outside of the speed control box, forming a first handle and a second handle; the first handle and / or the second handle are used for the user to operate and rotate the rotating rod.

[0015] On the other hand, the present invention also provides a garden machine, which includes any of the above-described self-propelled speed-regulating components and a handrail, wherein the self-propelled speed-regulating component is disposed on the handrail.

[0016] The self-propelled speed control component of the present invention and the garden machinery equipped with the self-propelled speed control component realize the self-propelled constant speed function and the self-propelled speed adjustment function in constant speed state through a mechanical structure, which simplifies the structure and operation, reduces the cost, and has higher reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the self-propelled speed control component embodiment with the top cover open.

[0018] Figure 2 This is an exploded view of some parts of an embodiment of the self-propelled speed control component.

[0019] Figure 3 This is an exploded view of an embodiment of the constant speed mechanism.

[0020] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the rotating rod.

[0021] Figure 5 This is a schematic diagram of an embodiment of the constant speed lever.

[0022] Figure 6 This is a schematic diagram of a handrail in an embodiment of garden machinery.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1-Self-propelled speed control component;

[0025] 2-Speed ​​control box, 21-Top cover, 211-Opening, 22-Base, 23-Blocking part;

[0026] 3-Rotating rod, 31-Protruding strip, 311-First stop end, 312-Second stop end, 32-First handle, 33-Second handle, 34-Positioning pin, 35-Reset spring;

[0027] 4-Signaling device;

[0028] 5-First gear, 51-Slot, 51a-First slot;

[0029] 6-Second gear;

[0030] 7-Speed ​​control mechanism, 71-Speed ​​control knob, 711-Fixing hole;

[0031] 72-Speed ​​control lever, 721-Opening;

[0032] 73-Male buckle, 73a-First male buckle, 73b-Second male buckle, 731-Connecting part, 732-Hook-shaped part, 733-Reinforcing rib, 732a-First insertion surface, 732b-Second insertion surface;

[0033] 74-Screw;

[0034] 8-First protrusion, 81-Second slot;

[0035] 9-Handrail, 91-Start button, 92-Start trigger;

[0036] α-exterior angle, β-interior angle. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The terms "first" or "second" in this application are only used to distinguish multiple components with the same or similar structures for ease of description and do not have any implied or associative function.

[0038] like Figure 1 As shown, the various components of the self-propelled speed control assembly 1 are installed inside the speed control box 2. The top cover 21 and the base 22 are assembled to form the speed control box 2, which is hollow inside to accommodate other components. A rotating rod and a signal device are installed inside the speed control box 2, and the rotating rod and the signal device are linked. The signal device outputs a signal to adjust the self-propelled speed; rotation of the rotating rod changes the output signal of the signal device.

[0039] In some embodiments, the rotating rod 3 and the signal device 4 are linked by meshing. The rotating rod 3 has a first gear 5 protruding in its circumferential direction, and the signal device 4 is connected to a second gear 6. The first gear 5 and the second gear 6 mesh with each other. Rotation of the second gear 6 changes the output signal of the signal device 4. The receiving terminal of this signal is connected to the signal device 4 via wired or wireless connection. The self-propelled speed is adjusted according to the received signal value; if no new signal value is received, the self-propelled speed is maintained. In actual use, the self-propelled speed control component 1 is installed on the garden machinery. The user operates the rotating rod 3 to rotate around its axis, and the rotation of the rotating rod 3 drives the second gear 6 to rotate.

[0040] The speed control box 2 also houses a speed-regulating mechanism, which can move along the axis of the rotating rod. In some practical applications, the self-propelled speed control component 1 is installed on garden machinery, and the machinery is already moving forward at a certain speed. The user operates the speed-regulating mechanism to move it in one direction until interference occurs between the speed-regulating mechanism and the first gear 5, thus restricting the rotation of the first gear 5. Similarly, moving the speed-regulating mechanism in the opposite direction releases the restriction on the first gear 5. This embodiment allows for easy locking of the output signal of the signal device 4, thereby achieving a speed-regulating function for the self-propelled speed.

[0041] Combination Figure 2 As shown, the structure of at least one embodiment is described below. The speed control mechanism 7 includes a speed control knob 71, a speed control block 72, and a male buckle 73. The speed control block 72 is located below the speed control knob 71, and the male buckle 73 is connected to and located below the speed control block 72. After the self-propelled speed control assembly 1 is installed, both the male buckle 73 and the speed control block 72 are housed within the speed control box 2, and a portion of the speed control knob 71 protrudes from the opening 211 of the top cover 21 outside the top cover 21.

[0042] Moving the speed control knob 71 will cause the speed control block 72 to move together, allowing the entire speed control mechanism 7 to move back and forth between a first position and a second position in the axial direction of the rotating rod 3. When the speed control mechanism 7 is in the first position, interference occurs between the male buckle 73 and the first gear 5, which can limit the rotation of the first gear 5 in the circumferential direction of the rotating rod 3; when the speed control mechanism 7 is in the second position, there is no interference between the male buckle 73 and the first gear 5, and the first gear 5 can rotate in the circumferential direction of the rotating rod 3.

[0043] More specifically, the male buckle 73 includes a connecting portion 731 and a hook-shaped portion 732. The first gear 5 is a cylindrical gear, the center of which is located on the axis of the rotating rod 3. The male buckle 73 is connected to the bottom of the speed control block 72 via the connecting portion 731, and the hook-shaped portion 732 is provided on the other end of the connecting portion 731. Corresponding to the hook-shaped portion 732, a groove 51 is provided on the side of the first gear 5, and the hook-shaped portion 732 faces the groove 51. In addition, a reinforcing rib 733 is added to the surface of the connecting portion 731 facing away from the groove 51 to improve the strength of the connecting portion 731 and make it less likely to break during deformation. When the speed control mechanism 7 is in the first position, the hook-shaped portion 732 extends into the groove 51, restricting the rotation of the first gear 5 in the circumferential direction of the rotating rod 3; when the speed control mechanism 7 is in the second position, the hook-shaped portion 732 disengages from the groove 51, and the restriction on the first gear 5 is released. This embodiment uses a mechanical structure to achieve self-propelled constant speed function. The structure is relatively simple, the constant speed is more reliable, and it is convenient for users to operate during the journey.

[0044] In some embodiments, a plurality of slots 51 are provided on the side of the first gear 5. The number of slots 51 corresponds to the number of gears in the self-driving constant speed function, enabling multi-gear constant speed control. The shapes of the slots 51 and the hook-shaped part 732 are adapted to each other. After the hook-shaped part 732 extends into the slot 51, the contact between the hook-shaped part 732 and the slot 51 is a surface contact, thereby improving the limiting effect of the male buckle 73 on the rotation of the first gear 5. In addition, the plurality of slots 51 are continuously distributed and are arc-shaped on the side of the first gear 5, and the center of the arc can be on the axis of the rotating rod 3. In this embodiment, each time the user moves the constant speed dial 71 to the first position and the constant speed mechanism 7 moves into place, the hook-shaped part 732 will always engage in one of the slots 51, improving the user experience of using the constant speed function.

[0045] In other embodiments, a slot is provided on the side of the second gear 6, and the hook-shaped portion 732 of the male buckle 73 engages with this slot. When the hook-shaped portion 732 is inserted into the side slot of the second gear 6, it restricts the rotation of the second gear 6. Since the second gear 6 and the first gear 5 mesh with each other, the rotation of the first gear 5 is also restricted. Similarly, when the hook-shaped portion 732 disengages from the side slot of the second gear 6, the restriction on the second gear 6 and the first gear 5 is released. In some embodiments, the second gear 6 is a cylindrical gear, and the slot structure and distribution of the second gear 6 can be referred to the description of the slot 51 of the first gear 5 in the specification, which will not be repeated here.

[0046] Combination Figure 3 As shown, in some embodiments, the speed control mechanism 7 includes a speed control knob 71, a speed control block 72, and a screw 74. The screw 74 passes through the opening 721 from below the speed control block 72 and is inserted into the fixing hole 711 of the speed control knob 71. The screw 74 and the fixing hole 711 are assembled together by an interference fit. The speed control knob 71 is at least partially exposed outside the speed control box 2. When the user moves the speed control knob 71 in the axial direction relative to the rotating rod 3, it synchronously drives the speed control block 72 to move.

[0047] The speed control lever 72 is roughly cube-shaped. The male buckle 73 is connected to the bottom of the speed control lever 72 via the connecting part 731 and is located on the side of the cube. The hook-shaped part 732 of the male buckle 73 faces the opposite side of this side.

[0048] The portion of the hook-shaped part 732 that extends into the slot 51 includes a first extending surface 732a and a second extending surface 732b. The contact surface between the slot 51 and the first extending surface 732a is the first slot wall, and the contact surface between the slot 51 and the second extending surface 732b is the second slot wall. The first slot wall and the first extending surface 732a are adapted to each other, and the second slot wall and the second extending surface 732b are adapted to each other. This adaptation is used to increase the contact area between the extending surface and the corresponding slot wall, ensuring that the speed control mechanism 7 limits the rotation of the first gear 5.

[0049] In some embodiments, the upper surface of the first insertion surface 732a, i.e., the hook-shaped portion 732, is configured as a guide surface, which is an inclined surface or a curved surface. Correspondingly, the first groove wall is also configured as a guide surface adapted to the first insertion surface 732a. In this embodiment, after the first insertion surface 732a is inserted into the slot 51, i.e., when the constant speed mechanism 7 is in the first position, when the rotating rod 3 is subjected to a certain downward rotational force, such as Figure 1 Applying a downward force to the handle causes the hook-shaped part 732 to disengage from the current slot 51 and insert into another adjacent slot 51 due to the guiding effect of the guide surface and the deformation of the male buckle 73 connecting part 731. Pressing the handle downwards can be set to reduce the self-propelled speed. This embodiment uses a mechanical mechanism to achieve the function of easily switching between different constant speed gears in constant speed mode, which is lower in cost and more reliable.

[0050] In some embodiments, the lower surface of the second insertion surface 732b, i.e., the hook-shaped portion 732, is configured as a guide surface, which is an inclined surface or a curved surface. Correspondingly, the second groove wall is also configured as a guide surface adapted to the second insertion surface 732b. In this embodiment, after the second insertion surface 732b is inserted into the slot 51, i.e., when the constant speed mechanism 7 is in the first position, when the rotating rod 3 is subjected to a certain upward rotational force, such as... Figure 1 A certain upward force is applied to the handle. Due to the guiding effect of the guide surface and the deformation of the male buckle 73 connecting part 731, the hook-shaped part 732 can disengage from the current slot 51 and insert into another adjacent slot 51. Lifting the handle upward can be set to increase the self-propelled speed. This embodiment uses a mechanical mechanism to realize the function of easily switching between different constant speed gears in constant speed mode, which is lower in cost and more reliable.

[0051] In other embodiments, the first insertion surface 732a and the second insertion surface 732b, i.e., the upper and lower surfaces of the hook-shaped portion 732, are both configured as guide surfaces, which are inclined or curved surfaces. Correspondingly, the first groove wall and the second groove wall are also configured as guide surfaces adapted to the corresponding insertion surfaces. In this embodiment, when the constant speed mechanism 7 is in the first position, when the rotating rod 3 is subjected to a certain upward or downward rotational force, such as... Figure 1Applying a certain upward or downward force to the handle causes the hook-shaped part 732 to disengage from the current slot 51 and insert into another adjacent slot 51 due to the guiding effect of the guide surface and the deformation of the male buckle 73 connecting part 731. Pressing the handle downwards can be set to increase the self-propelled speed, while raising the handle upwards can be set to decrease the self-propelled speed. This embodiment uses a mechanical mechanism to achieve the function of easily raising and lowering the constant speed gear in constant speed mode, resulting in lower cost and higher reliability.

[0052] In some embodiments, the speed control mechanism 7 includes two male fasteners, namely a first male fastener 73a and a second male fastener 73b. (See reference) Figure 3 As shown, the first male buckle 73a and the second male buckle 73b are arranged side by side, both located on the same side of the speed control block 72. Combined with... Figure 4 As shown, corresponding to the first male buckle 73a, the side of the first gear 5 is provided with multiple first slots 51a, which are adapted to the first male buckle 73a. Corresponding to the second male buckle 73b, the rotating rod 3 is also provided with an outwardly protruding first protrusion 8 in the circumferential direction, which is located on both sides of the rotating rod 3, respectively. The side of the first protrusion 8 is provided with multiple second slots 81, which are adapted to the second male buckle 73b. The specific structure of these slots and male buckles can be referred to in other embodiments.

[0053] In this embodiment, the speed-regulating mechanism 7 moves between a first position and a second position in the axial direction of the rotating rod 3. When the speed-regulating mechanism 7 is in the first position, the first male buckle 73a extends into the first slot 51a, and the second male buckle 73b also extends into the second slot 81. When the speed-regulating mechanism 7 is in the second position, the first male buckle 73a disengages from the first slot 51a, and the second male buckle 73b also disengages from the second slot 81. This embodiment uses double male buckles, which further improves the restriction on the first gear, thereby avoiding the situation where the male buckles accidentally disengage from the slots due to external forces such as vibration.

[0054] Combination Figure 5 In the illustrated embodiment, the first male buckle 73a and the second male buckle 73b have identical structures and are symmetrically connected below the speed control lever 72. The upper and lower surfaces of the hook-shaped portion 732 form external angles at their outer sides, and the upper and lower surfaces of the hook-shaped portion 732 form internal angles at their inner sides. In some embodiments, both the upper and lower surfaces of the hook-shaped portion 732 are inclined planes, and the external and internal angles have the same degree, with the external angle α ranging from 15° to 120°. In other embodiments, both the upper and lower surfaces of the hook-shaped portion 732 are inclined planes, and the external and internal angles have the same degree, with the internal angle β ranging from 15° to 60°.

[0055] exist Figure 5In the illustrated embodiment, both the upper and lower surfaces of the hook-shaped portion 732 are curved surfaces, and the degree of the outer angle is greater than that of the inner angle. This embodiment makes the male buckle 73 and the slot 51 more compatible. Specifically, the hook-shaped portion 732 and the arc-shaped slot 51 are more compatible, and there is more contact surface between the two after the hook-shaped portion 732 is inserted into the slot 51. In some embodiments, the outer angle α is 60°, the inner angle β is 45°, and both the upper and lower surfaces of the hook-shaped portion 732 are curved surfaces. In other embodiments, the outer angle α is 60°, the inner angle β is 45°, the angle bisectors of the outer angle and the inner angle are parallel and coplanar, the upper surface of the hook-shaped portion 732 is curved and connects the upper edges of the outer angle and the inner angle, and the lower surface of the hook-shaped portion 732 is curved and connects the lower edges of the outer angle and the inner angle.

[0056] In some embodiments, combined with Figure 4 As shown, a stop portion is provided on the rotating rod 3, and a stop portion 23 is provided inside the speed regulating box 2. The stop portion and the stop portion 23 are configured to limit the rotational freedom of the rotating rod 3 about its axis, which is the central axis of the rotating rod 3. In this embodiment, the stop portion is a protruding strip 31 that protrudes circumferentially from the rotating rod 3, and the stop portion 23 is a stop wall respectively provided on the top cover 21 and the base 22. The protruding strip 31 can only move between the two stop walls. The two ends of the protruding strip 31 will abut against the stop wall when the rotating rod 3 reaches the boundary of the reasonable rotation range. In this embodiment, the protruding strip 31 is an annular protruding strip 31, and the two ends of the protruding strip 31 are the first stop end 311 and the second stop end 312, respectively. The contact surfaces between the two stop ends and the stop walls are both planar. In other embodiments, a protruding strip 31 is provided at each end of the rotating rod 3 to achieve symmetrical limitation of the rotation range of the rotating rod 3.

[0057] This embodiment limits the rotatable space of the rotating rod, achieving the following technical advantages. Firstly, by limiting the rotation range of the first gear, it also limits the rotation range of the second gear, thus defining a definite range for the output signal value of the signal device. Secondly, since the number of slots is finite, this embodiment ensures that during simultaneous lifting, lowering, or switching of constant speed gears at a constant speed, the male latch will not be outside the last slot, and after lifting, lowering, or switching of constant speed gears, the hook-shaped part will re-insert into a slot. Clearly, other existing solutions can also be used to limit the rotation range of the rotating rod.

[0058] In some embodiments, reference Figure 1As shown, the two ends of the rotating rod 3 extend outwards to form a first handle 32 and a second handle 33 outside the speed control box 2, respectively. The user can set or de-set the self-propelled speed by moving the speed control knob 71 left or right. The user can adjust the self-propelled speed by lifting or pressing the handles to control the rotation of the rotating rod 3. By coordinating the operation of the speed control knob 71 and the handles, the user can raise or lower the speed or switch between speed control gears. Inserting the male clip into different slots corresponds to different speed control gears.

[0059] Combination Figure 1 and Figure 2 As shown, in some embodiments, a positioning post 34 protrudes from the rotating rod 3, and a return spring 35 is sleeved on the positioning post 34, with the other end of the return spring 35 abutting against the base 22. The return spring 35 abuts against the rotating rod 3 to reset the rotating rod 3 to its initial position. In some embodiments, the initial position of the rotating rod 3 is the position with the minimum self-propelled speed, that is, the signal value output by the signal device 4 at this time is used as the corresponding signal value for the minimum self-propelled speed.

[0060] In one embodiment, the signal device 4 is a sliding rheostat. In another embodiment, the signal device 4 is a potentiometer, which is a type of sliding rheostat. The rotation of the second gear 6 changes the resistance value of the potentiometer, thereby outputting different electrical signals.

[0061] In other embodiments, the self-propelled speed control component 1 is mounted on the garden machinery, and the self-propelled speed control component 1 is one of the embodiments described above. (Combined with...) Figure 6 As shown, the self-propelled speed control component 1 is installed on the handlebar 9 of the garden machinery, located in the middle of the part of the handlebar 9 that the user can push. The speed control box 2 has a through-mounting channel, through which the handlebar 9 is inserted and fixed with fasteners. The speed control knob 71 is located on the upper side of the speed control box 2, with the handle facing outward and close to the user side, making it convenient for the user to control and adjust the speed.

[0062] In one embodiment, the garden machinery is a lawnmower. (Combined with...) Figure 6 As shown, the lawnmower has a dual-start function. The mowing blades only begin to rotate when the start button 91 is pressed and the start trigger 92 is gripped. Simultaneously, the start button 91 also serves as the start button for the lawnmower's self-propelled function. The signal device 4 in the self-propelled speed control assembly 1 is electrically connected to the lawnmower's signal processing module or circuit board assembly. The signal processing module or circuit board assembly receives the electrical signals sent by the signal device 4 and controls the lawnmower's drive motor to rotate at different speeds according to different electrical signal values, thereby realizing the lawnmower's self-propelled constant speed and speed control functions.

[0063] In another embodiment, the garden machinery is a snowplow with self-propelled capability. A self-propelled speed control component 1 is mounted on the snowplow's handlebar 9. The signal device 4 in the self-propelled speed control component 1 is electrically connected to the snowplow's signal processing module or circuit board assembly. The signal processing module or circuit board assembly receives the electrical signals sent by the signal device 4 and controls the snowplow's drive motor to rotate at different speeds according to different electrical signal values, thereby realizing the snowplow's self-propelled constant speed and speed control functions.

[0064] The above-described embodiments are preferred embodiments of this application and are only used to facilitate the illustration of this application. They are not intended to limit this application in any way. Any person with ordinary knowledge in the art can make equivalent embodiments by making partial modifications or alterations to the technical content disclosed in this application without departing from the scope of the technical features of this application. Such equivalent embodiments are still within the scope of the technical features of this application.

Claims

1. A self-propelled speed adjustment assembly, characterized in that, The speed regulating box, the rotating rod and the signal device are arranged in the speed regulating box; the rotating rod is provided with a first gear outwardly protruding in the circumferential direction, and the rotating rod rotates to drive the first gear to rotate; the first gear and a second gear are engaged; the signal device is connected with the second gear, and the second gear rotates to adjust the output signal of the signal device; the constant speed mechanism is partially arranged in the speed regulating box; the constant speed mechanism is movable relative to the axial direction of the rotating rod to limit the rotation of the first gear or release the limitation on the rotation of the first gear; The constant speed mechanism comprises a male buckle arranged in the speed regulating box; the side surface of the first gear is provided with a plurality of clamping grooves matched with the male buckle; the constant speed mechanism is movable between a first position and a second position in the axial direction of the rotating rod; when the constant speed mechanism is located at the first position, the male buckle extends into the clamping groove; when the constant speed mechanism is located at the second position, the male buckle is separated from the clamping groove; When the male buckle extends into the clamping groove, the constant speed mechanism limits the rotation of the first gear; when the male buckle is separated from the clamping groove, the constant speed mechanism releases the limitation on the rotation of the first gear; The constant speed mechanism comprises a constant speed knob and a constant speed block; the constant speed block is located below the constant speed knob and arranged in the speed regulating box; the male buckle is connected with the constant speed block and located below the constant speed block; the constant speed knob is at least partially exposed outside the speed regulating box to drive the constant speed block to move relative to the axial direction of the rotating rod; The rotating rod is provided with a stop portion, and the speed regulating box is provided with a resisting portion; the stop portion and the resisting portion are matched to limit the rotation freedom of the rotating rod about its axis; the two ends of the rotating rod extend outwardly to the outside of the speed regulating box to form a first handle and a second handle; the first handle and / or the second handle are used for a user to rotate the rotating rod. The male buckle comprises a hook-shaped portion; when the constant speed mechanism is located at the first position, the hook-shaped portion extends into the clamping groove; the portion of the hook-shaped portion extending into the clamping groove comprises a first extending surface and a second extending surface; the contact surface between the clamping groove and the first extending surface is a first groove wall, and the contact surface between the clamping groove and the second extending surface is a second groove wall; the first groove wall and the first extending surface are matched, and the second groove wall and the second extending surface are matched.

2. The self-propelled speed adjustment assembly of claim 1, wherein, The first extending surface and / or the second extending surface are guide surfaces; the guide surfaces are used to guide the hook-shaped portion to separate from the clamping groove when the constant speed mechanism is located at the first position and the rotating rod is rotated.

3. The self-propelled speed adjustment assembly of claim 2, wherein, The guide surfaces are inclined surfaces or curved surfaces.

4. The self-propelled speed adjustment assembly of claim 3, wherein, ​ 5. The self-propelled speed adjustment assembly of claim 1, wherein, The constant speed mechanism comprises two male buckles, which are arranged in the speed regulating box and are respectively a first male buckle and a second male buckle; a plurality of first clamping grooves are arranged on the side surface of the first gear, and the first clamping grooves are matched with the first male buckle; a first protruding part protruding outward is further arranged on the circumference of the rotating rod, and the first protruding part and the first gear are respectively located on the two sides of the rotating rod; a plurality of second clamping grooves are arranged on the side surface of the first protruding part, and the second clamping grooves are matched with the second male buckle; The constant speed mechanism moves between a first position and a second position in the axial direction of the rotating rod; when the constant speed mechanism is located at the first position, the first male buckle extends into the first clamping groove, and the second male buckle extends into the second clamping groove; when the constant speed mechanism is located at the second position, the first male buckle is separated from the first clamping groove, and the second male buckle is separated from the second clamping groove.

6. A garden machine characterized by The garden machinery comprises the self-propelled speed regulating assembly and the handrail rod, and the self-propelled speed regulating assembly is arranged on the handrail rod.

Images