A pulverizing device

Abstract

The application provides a kind of pulverizer, at least comprising: motor to provide power;Impact assembly to transmit the power of motor and make axial linear motion and circumferential rotation;Crushing cutter to make circumferential rotation and crush material;Wherein, the motor, impact assembly and pulverizing cutter are coaxial and sequentially arranged along the axial direction, and the pulverizing cutter is directly power connected with the impact assembly.The application realizes the main body height short, the whole machine smaller and lighter by the cooperation of small power and small torque motor and impact assembly under the premise of the same pulverizing capacity, i.e., the rotation torque of pulverizing cutter.

Description

Technical Field

[0001] This invention relates to the field of shredder technology, and in particular to a small-volume, lightweight shredding device. Background Technology

[0002] A branch shredder is a common gardening tool used to shred branches generated in gardens. For example, a shredding device disclosed in Patent Document 1 mainly includes a shredding body for shredding materials; a frame for supporting the shredding body; and a power supply device that provides power to the shredding body. The shredding body includes a housing with a power chamber for accommodating at least a portion of the power supply device.

[0003] To meet the crushing capacity with high torque, this type of crushing device is equipped with a gear transmission assembly with a large transmission ratio (300-500:1) and a high-power, high-torque motor, which results in problems such as large machine size and heavy weight, and has its shortcomings.

[0004] Patent document 1CN114643123A. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art by providing a crushing device that reduces volume and mass while maintaining the same crushing capacity.

[0006] The present invention solves the technical problem by adopting the following technical solution: a pulverizing device.

[0007] An electric motor used to provide power;

[0008] Impact components used to transmit the power of a motor and produce axial and circumferential rotational motion.

[0009] A crushing blade used to make circumferential rotational motion and crush materials;

[0010] The motor, impact assembly, and crushing blade are coaxial and arranged sequentially along the axial direction, and the crushing blade and impact assembly are directly connected by power.

[0011] In several embodiments, the impact assembly comprises components that are coaxially arranged and sequentially disposed away from the motor along the axial direction:

[0012] A speed reduction assembly used for drive connection with the output shaft of a motor;

[0013] A spring used to store and release energy;

[0014] An impact body used to transmit dynamic circumferential torque;

[0015] The output shaft is used to transmit circumferential torque to the crusher body;

[0016] The spring acts directly on the impactor, which can make axial and circumferential rotational movements on the deceleration assembly and transmit torque to the output shaft. The crushing blade is directly poweredly connected to the output shaft.

[0017] In several embodiments, the impact body includes a centrally symmetrically arranged end protrusion, and the output shaft includes a centrally symmetrically arranged impact cantilever. The end protrusion and the impact cantilever are linked and cooperate to form a circumferential impact torque.

[0018] In several embodiments, the output shaft includes an impact cantilever, a support section, a torque transmission feature, and a support arc surface arranged coaxially, with the impact cantilever, support section, torque transmission feature, and support arc surface arranged sequentially away from the motor.

[0019] In several embodiments, the support segment and the support arc surface form a fixed pivot axis, and the output shaft pivots around the fixed pivot axis formed by the support segment and the support arc surface.

[0020] In several embodiments, the pulverizing blade body is provided with an anti-torsion feature, which forms a detachable engagement with the torque transmission feature of the output shaft.

[0021] In several embodiments, the crushing blade is axially penetrated by the torsion transmission feature.

[0022] In several embodiments, the torsion transmission feature is a flat, centrally symmetrical shape.

[0023] In several embodiments, the anti-torsion feature is a centrally symmetrical flat rectangle.

[0024] In several embodiments, the impact assembly includes at least an impact body and an output shaft arranged coaxially and sequentially along the axial direction, with the crushing blade body penetrated by the output shaft.

[0025] The present invention has the following beneficial effects:

[0026] This invention achieves a shorter main body height, making the whole machine smaller and lighter, by combining a low-power, low-torque motor with an impact component, while maintaining the same crushing capacity, i.e., the rotational torque of the crushing blade. Attached Figure Description

[0027] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of the invention.

[0028] Figure 1 The three-dimensional structure of the crushing device in this embodiment is schematically shown;

[0029] Figure 2The diagram schematically illustrates a comparison between the prior art and the crushing device in this embodiment;

[0030] Figure 3 schematically shown Figure 1 The explosive structure;

[0031] Figure 4 schematically shown Figure 1 A cross-sectional structure in the front and back directions;

[0032] Figure 5 schematically shown Figure 3 Explosion structure of the mid-impact component;

[0033] Figure 6 schematically shown Figure 4 Sectional structure along line B;

[0034] Figure 7 schematically shown Figure 4 C-section structure;

[0035] Figure 8 The structure of the output shaft in another embodiment is schematically shown;

[0036] Figure 9 The output shaft in another embodiment is schematically shown. Figure 4 The B-direction cross-sectional structure under the condition;

[0037] Figure 10 The output shaft in another embodiment is schematically shown. Figure 4 The C-direction cross-sectional structure under the condition. Detailed Implementation

[0038] The embodiments of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0039] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the invention.

[0041] For example, terms such as "axial," "radial," "relative," "upper," and "lower" indicate relative or absolute configuration. They not only indicate such a configuration in a strict sense, but also indicate a state of relative displacement with tolerances or angles or distances that can achieve the same level of functionality.

[0042] Example 1

[0043] like Figure 1 As shown, the crushing device 10a of the present invention is composed of a main body 2, a box cover plate 16 and a support component 3 from top to bottom, and is in a vertical state. The device is roughly divided into the main body 2 on the upper side and the support component 3 on the lower side with the box cover plate 16 as the boundary.

[0044] The main body 2 and the box cover 16, and the box cover 16 and 3 can be fixedly connected or detachably fixedly connected. Regardless of the connection method, the device is fixed as a whole when working.

[0045] The main body 2 is equipped with a handle 13 for user use, a housing 15 for accommodating structural components, a power interface 14, a feed port 11, an operation panel 12, a motor 23, etc.

[0046] The device uses AC power. After the user connects to the mains power through the power interface 14, the user can control the motor 23 to start, stop, rotate forward and reverse through the operation panel 12 to adjust the working status of the device. It is foreseeable that the present invention can also use DC power, such as battery packs of various voltage platforms (18V, 36V, 48V, 60V, etc.) as the power source input.

[0047] When moving the device, the user can hold the handle 13 and use the rollers 18 to move it.

[0048] like Figure 2 As shown, 10b is a prior art crushing device and 10a is the crushing device of the present invention. Both have the same housing cover plate 16 and support component 3. In the main body 2, the crushing device 10b adopts a structure of high power and high torque motor combined with transmission component 20, which is generally a multi-stage gear transmission, such as a two-stage planetary gear or a three-stage compound gear system transmission. The crushing device 10a adopts a structure of low power and low torque motor 23 combined with impact component 30. After adopting impact component 30, the required motor output power is reduced while ensuring that the output torque of the crushing blade 25 remains unchanged.

[0049] From possible Figure 2As can be seen from the above, the length and width of the material discharge channel 26 in the crushing devices 10a and 10b are the same, and the material discharge channel 26 is spaced at the same distance from the front upper side of the transmission component 20 or the impact component 30. That is, the power input end face of the crushing blades used by both are the same, and the working diameter of the crushing blades used is the same. Under this size premise, the height Ha of the crushing device 10a is significantly reduced compared to the height Hb of the crushing device 10b.

[0050] like Figure 3 As shown, specifically, the main body 2, the box cover 16, and the support component 3 are combined with the machine body support system. The machine body support system mainly consists of the shell 15, the box cover 16, and the bracket 19, which are fixedly connected as a whole. Other components in the main body 2 are directly or indirectly connected to or installed in the shell 15. Other components in the support component 3 are directly or indirectly connected to or installed in the bracket 19. For example, the roller 18 is pivotally connected to the bracket 19, and the crushing box 17 is detachably installed in the bracket 19.

[0051] The power system mainly consists of a power interface 14 or a DC power supply unit, a motor 23, and an impact assembly 30. The motor 23 refers to a brushless motor or a brushed motor, preferably a brushless external rotor motor, followed by a brushless internal rotor motor, and lastly a brushed motor. When the device uses AC power, it has a power interface 14. When using DC portable power, it has a DC power supply unit (not shown in the figure) on its body, such as a chamber for installing a usable battery pack (18V, 36V, 48V, 60V, etc.).

[0052] The working system consists of a feed inlet 11, a discharge channel 26, a fixed blade 24, a crushing blade 25, an end cap 21, and a crushing box 17. Materials to be crushed, such as branches and leaves, enter through the feed inlet 11 and are guided by the discharge channel 26 to fall between the fixed blade 24 and the crushing blade 25. They are cut and squeezed by the relative motion of the two blades and finally crushed into small pieces, which fall into the crushing box 17. After crushing, the user removes the crushing box 17 from the support 19 and emptys the small pieces from the crushing box 17.

[0053] Combination Figure 4 As shown, the impact assembly 30 is used to transmit the power of the motor and make axial linear motion and circumferential rotational motion, relying on it to make impact action. It is mainly composed of a deceleration assembly 31, a spring 32, an impact body 33, and an output shaft 34 arranged coaxially in sequence. The deceleration assembly 31 receives the power of the motor 23 and transmits the appropriate speed and torque to the impact body 33. The spring 32 completes the energy storage and release during the axial movement of the impact body 33. The impact body 33 receives the power of the deceleration assembly 31 and transmits its own energy to the output shaft 34 through impact. The output shaft 34 receives the energy of the impact body 33, increases the torque, and transmits its own energy to the crushing blade body 25.

[0054] Combination Figure 3-5 The output shaft of the deceleration assembly 31 has two V-shaped grooves on its outer surface, and the inner side of the impact body 33 also has two V-shaped grooves. There are two rigid balls that are centrally symmetrically distributed in the two V-shaped grooves of the deceleration assembly 31 and the impact body 33. Thus, the impact body 33 can make axial movement and circumferential rotation on the output shaft of the deceleration assembly 31.

[0055] That is, through the impact component 30, the motor 23 outputs power, which is reduced by the reduction component 31 and then the appropriate speed and torque are transmitted to the impact body 33. The impact body 33 transmits its own energy to the output shaft 34 through circumferential impact, and the output shaft 34 transmits the energy to the crushing blade 25 to achieve the crushing action.

[0056] Combination Figures 5-6 The output shaft 34 is composed of an impact cantilever 341, a support section 342, a torque transmission feature 343, and a support arc surface 344 arranged coaxially in sequence. The two impact cantilever 341 are centrally symmetrically arranged on the support section 342. Correspondingly, the impact body 33 is provided with a centrally symmetrically arranged end protrusion 331. The impact cantilever 341 and the end protrusion 331 cooperate to realize the energy transfer between the impact body 33 and the output shaft 34, that is, the impact torque in the circumferential direction. The support section 342 and the support arc surface 344 are coaxial, and the two form a fixed pivot axis, which supports the output shaft 34 to rotate around the fixed pivot axis. Finally, the energy of the output shaft 34 is transferred to the anti-torsion feature 251 of the crushing blade body 25 through the torque transmission feature 343. That is, the torque transmission feature 343 and the anti-torsion feature 251 serve as two connecting surfaces for power transmission.

[0057] Combination Figure 6 The torsion transmission feature 343 of the output shaft 34 has a cross-section that is centrally symmetrical quadrilateral. The anti-torsion feature 251 on the crushing blade 25 is fitted with it with a small clearance. The crushing blade 25 and the output shaft 34 can be detachably assembled. The supporting arc surface 344 is an arc surface with a diameter larger than the side length of the quadrilateral of the torsion transmission feature 343. When the 34 axially penetrates the crushing blade 25, the supporting arc surface 344 and the crushing blade 25 do not interfere with each other.

[0058] like Figure 7 The supporting arc surface 344 of the output shaft 34 is supported inside the end cover 21. The centrally symmetrical supporting arc surface 344 contacts and engages with the concentric supporting circle 211, meaning that the output shaft 34 can rotate around a fixed axis inside the end cover 21.

[0059] Example 2

[0060] like Figure 8As shown, unlike Embodiment 1, the structure of the output shaft has been changed. Here, the output shaft 34a has four characteristic parts arranged coaxially in sequence: impact cantilever 341a, support section 342a, torsion transmission feature section 343a, and support arc surface 344a. The two torsion transmission feature sections 343a are arranged in a centrally symmetrical manner to transmit the energy of the output shaft 34a to the feature section of the crushing blade body 25. The support arc surface 344a is coaxial with the support section 342a, and its diameter is smaller than the shortest side length of the cross section of the torsion transmission feature section 343a. The torsion transmission feature section 343a and the anti-torsion feature section 251 are flat rectangular structures arranged in a centrally symmetrical manner.

[0061] like Figure 9 As shown, the cross-section of the torque transmission feature 343a of the output shaft 34a is a centrally symmetrical double-sided circle. The anti-torsion feature 251 on the crushing blade 25 is fitted with it with a small clearance. The crushing blade 25 and the output shaft 34a are detachably assembled. The supporting arc surface 344a is a cylindrical surface with a diameter smaller than the side length of the double-sided circle of the cross-section of the torque transmission feature 343a. When the output shaft 34a axially penetrates the crushing blade 25, there is no interference between the supporting arc surface 344a and the crushing blade 25.

[0062] like Figure 10 As shown, the supporting arc surface 344a of the output shaft 34a is supported inside the end cover 21 and is set concentrically with the supporting circle 211. The supporting arc surface 344a is a cylindrical surface, and the output shaft 34a can rotate around a fixed axis inside the end cover 21.

[0063] The examples, embodiments, and particular forms of the invention illustrated have been shown and described in detail in the accompanying drawings and foregoing description, and should also be considered illustrative rather than restrictive. The description of a particular feature in one embodiment does not imply that those particular features must be limited to that one embodiment. Features of one embodiment can be used in combination with features of other embodiments, as will be understood by those skilled in the art, whether or not explicitly stated. Exemplary embodiments have been shown and described, and all variations and modifications fall within the spirit of the invention and are intended to be protected.

[0064] In the picture:

[0065] 2-Main body; 3-Supporting components; 10a, 10b-Crushing device; 11-Feed inlet; 12-Operating panel; 13-Handle; 14-Power interface; 15-Housing shell; 16-Box cover; 17-Crushing box; 18-Roller; 19-Bracket; 20-Transmission component; 21-End cover; 211-Supporting circle; 22-Crushing adjustment component; 23-Motor; 24-Fixed blade; 25-Crushing blade body; 251-Anti-torsion feature; 26-Feeding channel; 27-Crushing adjustment locking component; 28-Crushing chamber; 29-DC power supply; 30-Impact component; 31-Reduction component; 32-Spring; 33-Impact body; 331-End protrusion; 34-Output shaft; 341-Impact cantilever; 342-Supporting section; 343-Torsion transmission feature; 344-Supporting arc surface.

Claims

1. A pulverizing device, characterized in that, At least including: An electric motor used to provide power; Impact components used to transmit the power of a motor and produce axial and circumferential rotational motion. A crushing blade used to make circumferential rotational motion and crush materials; The motor, impact assembly, and crushing blade are coaxial and arranged sequentially along the axial direction, and the crushing blade and impact assembly are directly connected by power. The impact assembly comprises components that are coaxially arranged and sequentially disposed away from the motor along the axial direction: A speed reduction assembly used for drive connection with the output shaft of a motor; A spring used to store and release energy; An impact body used to transmit dynamic circumferential torque; The output shaft is used to transmit circumferential torque to the crusher body; The spring acts directly on the impactor, which can make axial and circumferential rotational movements on the deceleration assembly and transmit torque to the output shaft. The crushing blade is directly poweredly connected to the output shaft. The impact body includes a centrally symmetrically arranged end protrusion, and the output shaft includes a centrally symmetrically arranged impact cantilever. The end protrusion and the impact cantilever are linked and cooperate to form a circumferential impact torque. The output shaft includes an impact cantilever, a support section, a torque transmission feature, and a support arc surface arranged coaxially, with the impact cantilever, support section, torque transmission feature, and support arc surface arranged sequentially away from the motor.

2. The pulverizing device according to claim 1, characterized in that, The support segment and the support arc surface form a fixed pivot axis, and the output shaft pivots around the fixed pivot axis formed by the support segment and the support arc surface.

3. The pulverizing device according to claim 2, characterized in that, The pulverizing blade is provided with an anti-torsion feature, which forms a detachable fit with the torque transmission feature of the output shaft.

4. A pulverizing device according to claim 3, characterized in that, The crushing blade is axially penetrated by the torsion transmission feature.

5. A pulverizing device according to claim 3, characterized in that, The torsion transmission feature is a flat, centrally symmetrical shape.

6. A pulverizing device according to claim 3, characterized in that, The anti-torsion feature is a flat, rectangular shape with central symmetry.

7. A pulverizing device according to claim 1, characterized in that, The impact assembly includes at least an impact body and an output shaft arranged coaxially and sequentially along the axial direction, with the crushing blade body penetrated by the output shaft.

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