Universal electric driving device and coffee bean grinding machine

Abstract

The utility model provides a general electric drive device and coffee bean grinder, general electric drive device includes drive motor, shell, magnet and elastic sleeve, drive motor is provided in the shell, the bottom cover of shell is equipped with the axle hole, the drive shaft of drive motor rotatablely passes through the axle hole, and the elastic sleeve is equipped with the magnet. An adaptive hole is formed in the extending end, located outside the shell, of the driving shaft, the cross section of the adaptive hole is polygonal, the magnet is arranged at the bottom end of the adaptive hole, the adaptive hole is used for being detachably connected to the driving end of a grinding shaft of the grinding device in a sleeving mode, and the magnet is used for being detachably and magnetically attracted to the driving end of the grinding shaft. The elastic sleeve is arranged on the bottom cover and used for being detachably connected to a grinding cup of the grinding device in a sleeving mode. The universal electric driving device can be matched with different grinding devices, is wide in universality, avoids resource waste, reduces purchase cost of a user, and can reduce grinding shaking amplitude so as to reduce grinding noise and improve grinding stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the electric appliance equipment of grinding coffee beans, especially to a general electric drive device and a coffee bean grinder with the general electric drive device. BACKGROUND

[0002] Coffee is a beverage brewed from coffee powder made of roasted coffee beans, and is one of the three major beverages in the world along with cocoa and tea. Among them, coffee beans refer to the kernel in the fruit of coffee trees, which is roasted by a proper method, and will show different degrees of sweetness, acidity, richness or cleanliness in taste.

[0003] In order to drink fresh ground coffee, people generally choose a coffee bean grinder to grind coffee beans to get coffee powder, and then brew the freshly ground coffee powder. There are two kinds of coffee bean grinders: hand-operated grinders and electric grinders. The difference between the two kinds of coffee bean grinders lies in the grinding power drive device, i.e. the grinding power drive device of the hand-operated grinder is a manual crank drive device, and the grinding power drive device of the electric grinder is a motor-driven drive device.

[0004] However, the existing hand-operated grinder only has a manual crank drive device for manual grinding, and the function is relatively single, which is inconvenient to use. Moreover, if a user who has purchased a hand-operated grinder wants to replace it with an electric grinder, because there is no separate motor-driven drive device on the market that can adapt to the grinding device of the hand-operated grinder, the user needs to purchase a complete set of electric grinder including motor-driven drive device and grinding device, which results in that the original grinding device of the hand-operated grinder cannot be adapted for use any more and can only be discarded, wasting resources and increasing the purchase cost of the user, thereby affecting the user's purchase experience. SUMMARY

[0005] In order to achieve the first purpose of the utility model, the utility model provides a general electric drive device which can adapt to different grinding devices and has wide generality, can be stably disassembled and assembled to different grinding devices, avoids resource waste, reduces the purchase cost of the user, thereby improves the purchase experience of the user, and can reduce the grinding shaking amplitude to reduce the grinding noise and improve the grinding stability, thereby improving the user's experience.

[0006] In order to achieve the second purpose of the utility model, the utility model provides a coffee bean grinder with the general electric drive device.

[0007] In order to realize the first purpose of the utility model, the utility model provides a general electric drive device, including drive motor, shell, magnet and elastic sleeve, drive motor is arranged in the shell, the bottom cover of shell is equipped with shaft hole, the driving shaft of drive motor can rotate and go out the shaft hole, the outer end of driving shaft is equipped with adaptive hole outside the shell, the cross section of adaptive hole is polygon, magnet is arranged on the hole bottom end of adaptive hole, and adaptive hole is used for detachable sleeve joint on the drive end of grinding shaft of grinding device, magnet is used for detachable magnetic adsorption on the drive end of grinding shaft, elastic sleeve is arranged on the bottom cover, and elastic sleeve is used for detachable sleeve joint on the grinding cup of grinding device.

[0008] From the above scheme, the utility model discious a general electric drive device is firmly assembled on the grinding device, and then the drive motor of the utility model general electric drive is started, so that the drive motor controls the rotation of the driving shaft, and because the cross section of the adaptive hole is polygonal, the driving shaft can drive the grinding shaft of the grinding device to rotate synchronously, the grinding wheel is arranged on the grinding shaft, so that the coffee beans in the grinding cup are ground into coffee powder.

[0009] When the grinding device is adapted to grind coffee beans, the driving shaft of the utility model general electric drive device is sleeved on the drive end of the grinding shaft of the grinding device through the polygonal adaptive hole, and the magnet at the hole bottom end of the adaptive hole is magnetically adsorbed on the drive end of the grinding shaft, so that the driving shaft of the utility model general electric drive device can be stably adsorbed and sleeved on the drive end of the grinding shaft of the grinding device, the grinding vibration amplitude can be reduced, the grinding noise can be reduced, and the grinding stability can be improved, thereby improving the user experience.

[0010] In addition, when the grinding device is adapted to grind coffee beans, the elastic sleeve of the utility model general electric drive device is sleeved on the grinding cup of the grinding device, which can avoid the problem of coffee powder leakage during grinding, and the elastic sleeve has elastic deformation capacity, so that the elastic sleeve can adapt to grinding cups of various diameters, so that the utility model general electric drive device can adapt to different grinding devices, and has wide versatility. At the same time, the elastic sleeve can be tightly sleeved on the grinding cup of the grinding device, so that the utility model general electric drive device can be stably assembled to different grinding devices, avoiding resource waste and reducing the purchase cost of users, thereby improving the purchase experience of users.

[0011] Therefore, the universal electric driving device can be adapted to different grinding devices, has wide universality, can be stably disassembled and assembled to different grinding devices, avoids resource waste, reduces the purchase cost of users, improves the purchase experience of users, reduces the grinding vibration amplitude, reduces the grinding noise and improves the grinding stability, and further improves the use experience of users.

[0012] One preferred scheme is that the universal electric driving device further comprises a limiting ring cylinder, which is arranged on the bottom cover and sleeved on the outer circumferential wall of the elastic sleeve.

[0013] Further, the universal electric driving device further comprises a supporting ring, which is provided with an opening; the inner circumferential wall of the elastic sleeve is provided with a first ring groove, which is arranged close to the insertion end of the elastic sleeve away from the shell; the supporting ring is located in the first ring groove; or, the elastic sleeve is provided with a second ring groove close to the retaining end face of the bottom cover; the supporting ring is located in the second ring groove; and / or, the limiting end of the limiting ring cylinder is provided with a limiting ring eave; the insertion end of the elastic sleeve away from the shell is abutted on the limiting ring eave; and the inner circumferential wall of the elastic sleeve protrudes the inner circumferential wall of the limiting ring eave in the radial direction of the limiting ring eave.

[0014] Further, the outer circumferential wall of the insertion end of the elastic sleeve away from the shell is concave and provided with a plurality of grooves, which are uniformly distributed in the circumferential direction of the elastic sleeve; the inner circumferential wall of the elastic sleeve is protrudingly provided with a plurality of bosses, which are uniformly distributed in the circumferential direction of the elastic sleeve and staggered with the plurality of grooves in the circumferential direction of the elastic sleeve; and the bosses are used for detachably abutting on the outer circumferential wall of the grinding cup; and / or, the outer circumferential wall of the insertion end of the elastic sleeve away from the shell is obliquely arranged to form a limited inclined surface; the inner circumferential wall of the limiting end of the limiting ring cylinder is obliquely arranged to form a limiting inclined surface; the limiting inclined surface is abutted with the limited inclined surface; and the limiting inclined surface protrudes the limited inclined surface in the axial direction of the limiting ring cylinder to limit the insertion end of the elastic sleeve in the axial direction of the limiting ring cylinder.

[0015] Further, the universal electric driving device further comprises a supporting ring cylinder, which is arranged on the bottom cover; the supporting end of the supporting ring cylinder away from the shell is used for detachably abutting on the upper end face of the grinding cup; the outer circumferential wall of the supporting end of the supporting ring cylinder is protrudingly provided with a connecting ring; the connecting end of the limiting ring cylinder is threadedly sleeved on the outer circumferential wall of the connecting ring; the limiting cavity is formed between the limiting end of the limiting ring cylinder and the connecting ring; and the outer circumferential side of the elastic sleeve is limited in the limiting cavity.

[0016] Further, the connecting ring is protrudingly provided with a limiting column close to the upper end outer circumferential wall of the shell; the connecting end of the limiting ring cylinder is provided with a limiting groove close to the upper end inner circumferential wall of the shell; and the limiting column is inserted into the limiting groove.

[0017] Further, the universal electric driving device further comprises an elastic rubber ring, the elastic rubber ring is located in a cylinder hole of the supporting ring, a circumferential wall of the cylinder hole is provided with a rigid internal thread, an outer circumferential wall of the elastic rubber ring is provided with an elastic external thread, the elastic external thread is matched with the rigid internal thread, and an inner circumferential wall of the elastic rubber ring is provided with a plurality of L-shaped elastic hooks.

[0018] Further, the bottom cover is provided with a plurality of rigid plates, one rigid plate is connected to an inner side of one rigid hook close to the driving shaft, a side of one rigid plate close to the rigid hook is provided with a protruding strip, the protruding strip extends in the circumferential direction of the shell, each rigid hook comprises a first rigid arm and a second rigid arm connected to each other, one end of the first rigid arm away from the second rigid arm extends in the axial direction of the driving shaft and is connected to the bottom cover of the shell, one end of the second rigid arm away from the first rigid arm extends in the circumferential direction of the shell, the height of the protruding strip protruding from the rigid plate gradually decreases from one end close to the first rigid arm to the other end away from the first rigid arm, and the protruding strip is pressed against the elastic hook.

[0019] Further, the universal electric driving device further comprises a circuit board, the circuit board is arranged in the shell and is electrically connected to the driving motor; the universal electric driving device further comprises a battery and an elastic sealing element, the battery is located in the shell and is electrically connected to the circuit board, the circuit board is provided with a charging head, the top cover of the shell is provided with a through groove corresponding to the charging head, and the top cover is provided with a mounting hole, a limiting groove is formed in the outer end face of the top cover corresponding to the through groove and the mounting hole, the elastic sealing element is embedded in the limiting groove in interference fit, an elastic connecting rod is protruded from the inner side of a first end of the elastic sealing element, a mushroom head is arranged at the end of the elastic connecting rod, the elastic connecting rod passes through the mounting hole and is buckled on the inner end face of the top cover, and a grabbing part is protruded from the outer side of a second end of the elastic sealing element; and / or, the circuit board is provided with a key switch, the top cover of the shell is provided with a key hole corresponding to the key switch, the universal electric driving device further comprises a touch plate, the touch plate is connected to the key hole through a plurality of arc-shaped elastic arms, and the plurality of arc-shaped elastic arms are evenly distributed in the circumferential direction of the touch plate; and / or, the circuit board is provided with a plurality of light emitting elements, the plurality of light emitting elements are arranged side by side, the top cover of the shell is provided with a plurality of light emitting holes, one light emitting hole is corresponding to one light emitting element, and the universal electric driving device further comprises a light guide strip, the outer end face of the top cover is provided with a positioning groove corresponding to the plurality of light emitting holes, and the light guide strip is located in the positioning groove and extends in the side-by-side direction of the plurality of light emitting elements to cover the plurality of light emitting elements.

[0020] In order to realize the second purpose of the utility model, the utility model provides a coffee bean grinder, including general electric drive device and grinding device, general electric drive device and grinding device can be detachable and adapt, general electric drive device is above mentioned general electric drive device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the exploded view of the first embodiment of the coffee bean grinder of the utility model.

[0022] Figure 2 It is the sectional view of the first embodiment of the coffee bean grinder of the utility model.

[0023] Figure 3 It is the first perspective view of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0024] Figure 4 It is the second perspective view of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0025] Figure 5 It is the first partial structure exploded view of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0026] Figure 6 It is the first perspective view of the top cover of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0027] Figure 7 It is the second perspective view of the top cover of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0028] Figure 8 It is the structure diagram of the bottom cover of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0029] Figure 9 It is Figure 8 The enlarged view at A.

[0030] Figure 10 It is the second partial structure exploded of the general electric drive device in the first embodiment of the coffee bean grinder of the utility model.

[0031] Figure 11 It is the sectional view of the second embodiment of the coffee bean grinder of the utility model.

[0032] Figure 12 It is the partial exploded view of the second embodiment of the coffee bean grinder of the utility model.

[0033] Figure 13 It is the partial structure sectional view of the second embodiment of the coffee bean grinder of the utility model.

[0034] Figure 14 Figure 3 is a partial structure sectional view of the third embodiment of the coffee bean grinder.

[0035] Figure 15 Figure 4 is a partial structure exploded view of the third embodiment of the coffee bean grinder.

[0036] The utility model will be further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0037] The first embodiment of the coffee bean grinder:

[0038] Referring to Figures 1 to 10 , the embodiment discloses a coffee bean grinder which comprises a general electric driving device 20 and a grinding device 10, and the general electric driving device 20 is detachably matched with the grinding device 10. Wherein, the general electric driving device 20 of the embodiment comprises a driving motor 27, a shell 21, a magnet 26 and an elastic sleeve 23, the driving motor 27 is arranged in the shell 21, the bottom cover 213 of the shell 21 is provided with a shaft hole (not marked), and the driving shaft 25 of the driving motor 27 can rotatably pass through the shaft hole. And, the outer end of the driving shaft 25 located outside the shell 21 is provided with an adapter hole 251, the cross section of the adapter hole 251 is polygonal, the magnet 26 is arranged on the hole bottom end of the adapter hole 251, and the adapter hole 251 is used for detachably sleeving on the driving end of the grinding shaft 12 of the grinding device 10, and the magnet 26 is used for detachably magnetically adsorbing on the driving end of the grinding shaft 12. In addition, the elastic sleeve 23 of the embodiment is arranged on the bottom cover 213, and the elastic sleeve 23 is used for detachably sleeving on the grinding cup 11 of the grinding device 10.

[0039] When the general electric driving device 20 of the embodiment is matched with the grinding device 10 to carry out coffee bean grinding operation, the coffee beans are placed into the grinding cup 11 of the grinding device 10, then the elastic sleeve 23 of the general electric driving device 20 of the embodiment is sleeved on the outer peripheral wall of the grinding cup 11, at the same time, the adapter hole 251 of the general electric driving device 20 of the embodiment is sleeved on the driving end of the grinding shaft 12 of the grinding device 10, and the magnet 26 of the general electric driving device 20 of the embodiment is magnetically adsorbed on the driving end of the grinding shaft 12 of the grinding device 10, so that the general electric driving device 20 of the embodiment is stably assembled on the grinding device 10, then the driving motor 27 of the general electric driving device of the embodiment is started, so that the driving motor 27 controls the rotation of the driving shaft 25, because the cross section of the adapter hole 251 is polygonal, so that the driving shaft 25 can synchronously drive the grinding shaft 12 of the grinding device 10 to rotate, the grinding wheel (not marked) is arranged on the grinding shaft 12, so that the coffee beans in the grinding cup 11 are ground into coffee powder.

[0040] When the grinding device 10 is adapted to grind coffee beans, the drive shaft 25 of the universal electric drive device 20 is sleeved on the drive end of the grinding shaft 12 of the grinding device 10 through the polygonal adapter hole 251, and the magnet 26 at the bottom end of the adapter hole 251 is magnetically adsorbed on the drive end of the grinding shaft 12, so that the drive shaft 25 of the universal electric drive device 20 can be stably adsorbed and sleeved on the drive end of the grinding shaft 12 of the grinding device 10, the grinding vibration amplitude can be reduced, the grinding noise can be reduced, and the grinding stability can be improved, thereby improving the user experience.

[0041] In addition, when the grinding device 10 is adapted to grind coffee beans, the elastic sleeve 23 of the universal electric drive device 20 is sleeved on the grinding cup 11 of the grinding device 10, which can avoid the problem of coffee powder leakage during grinding, and the elastic sleeve 23 has elastic deformation capability, so that the elastic sleeve 23 can be adapted to grinding cups 11 of various diameters, so that the universal electric drive device 20 can be adapted to different grinding devices 10, and has wide universality. At the same time, the elastic sleeve 23 can be tightly sleeved on the grinding cup 11 of the grinding device 10, so that the universal electric drive device 20 can be stably assembled to different grinding devices 10, avoiding resource waste and reducing the purchase cost of users, thereby improving the purchase experience of users.

[0042] Therefore, the universal electric drive device 20 can be adapted to different grinding devices 10, has wide universality, can be stably disassembled and assembled to different grinding devices 10, avoids resource waste, and reduces the purchase cost of users, thereby improving the purchase experience of users, and can reduce the grinding vibration amplitude, reduce the grinding noise, and improve the grinding stability, thereby improving the user experience.

[0043] In order to improve the working stability and reliability of the elastic sleeve 23, the universal electric drive device 20 further comprises a limiting ring cylinder 24, which is arranged on the bottom cover 213 and sleeved on the outer peripheral wall of the elastic sleeve 23, so as to limit the elastic deformation of the elastic sleeve 23 in the radial direction of the limiting ring cylinder 24, avoiding the limiting ring cylinder 24 from being difficult to be detachably sleeved on the grinding cup 11 of the grinding device 10 due to serious elastic deformation.

[0044] In order to further improve the working stability and reliability of the elastic sleeve 23, the universal electric drive device 20 of the embodiment further comprises a supporting ring 250, the inner circumferential wall of the elastic sleeve 23 is provided with a first ring groove 231, the first ring groove 231 is arranged close to the insertion end of the elastic sleeve 23 away from the shell 21, the supporting ring 250 is located in the first ring groove 231, and the supporting ring 250 is provided with an opening 2501. The opening supporting ring 250 is arranged close to the insertion end of the elastic sleeve 23, the opening supporting ring 250 can elastically support the insertion end of the elastic sleeve 23, so that the insertion end of the elastic sleeve 23 has a certain elastic deformation ability while having a stable hardness shape, thereby ensuring that the insertion end of the elastic sleeve 23 can be smoothly and detachably sleeved on the grinding cup 11 of the grinding device 10.

[0045] Specifically, the universal electric drive device 20 of the embodiment further comprises a supporting ring cylinder 22, the supporting ring cylinder 22 is arranged on the bottom cover 213, and the supporting end of the supporting ring cylinder 22 away from the shell 21 is used to abut on the upper end face of the grinding cup 11 in a detachable manner, the outer circumferential wall of the supporting end of the supporting ring cylinder 22 is protrudingly provided with a connecting ring 221, the connecting end of the limiting ring cylinder 24 is threadedly sleeved on the outer circumferential wall of the connecting ring 221, so that the limiting ring cylinder 24 is arranged on the bottom cover 213, a limiting cavity (not marked) is formed between the limiting end of the limiting ring cylinder 24 and the connecting ring 221, and the outer circumferential side of the elastic sleeve 23 is limited in the limiting cavity. Further, the limiting end of the limiting ring cylinder 24 of the embodiment is provided with a limiting ring eave 241, that is, the limiting ring eave 241 and the connecting ring 221 form the aforementioned limiting cavity, so that the outer circumferential side of the elastic sleeve 23 is limited in the limiting cavity, the insertion end of the elastic sleeve 23 away from the shell 21 abuts on the limiting ring eave 241, and the upper end of the elastic sleeve 23 close to the shell 21 abuts on the end face of the connecting ring 221, and the inner circumferential wall of the elastic sleeve 23 protrudes the inner circumferential wall of the limiting ring eave 241 in the radial direction of the limiting ring eave 241, so as to ensure that the inner circumferential wall of the elastic sleeve 23 can be closely and detachably sleeved on the grinding cup 11 of the grinding device 10.

[0046] In order to ensure the working reliability and stability of the limiting ring cylinder 24, the connecting ring 221 of the embodiment is protrudingly provided with a limiting column 222 close to the upper end outer circumferential wall of the shell 21, the connecting end of the limiting ring cylinder 24 is provided with a limiting groove 242 close to the upper end inner circumferential wall of the shell 21, and the limiting column 222 is inserted into the limiting groove 242. As the use time is prolonged, the threaded connection between the limiting ring cylinder 24 and the connecting ring 221 of the supporting ring cylinder 22 may be loose, the limiting column 222 on the connecting ring 221 of the supporting ring cylinder 22 of the embodiment is inserted into the limiting groove 242 on the connecting end of the limiting ring cylinder 24, so that the limiting ring cylinder 24 can be prevented from being separated from the connecting ring 221 of the supporting ring cylinder 22, thereby ensuring the working stability and reliability of the limiting ring cylinder 24 and the elastic sleeve 23.

[0047] In this embodiment, the general-purpose electric drive device 20 also includes an elastic rubber ring 216, which is located inside the cylinder hole of the support ring cylinder 22. The peripheral wall of the cylinder hole is provided with a rigid internal thread 223, and the outer peripheral wall of the elastic rubber ring 216 is provided with an elastic external thread 2162. The elastic external thread 2162 cooperates with the rigid internal thread 223. The inner peripheral wall of the elastic rubber ring 216 has a plurality of L-shaped elastic hooks 21612161 protruding from it. The plurality of elastic hooks 2161 are evenly distributed in the circumferential direction of the elastic rubber ring 216. The bottom cover 213 has a plurality of L-shaped rigid hooks 2131 protruding from it. One rigid hook 2131 is hooked with one elastic hook 2161. Therefore, in this embodiment, the general electric drive device 20 is a support ring cylinder 22 with an internal threaded connection of an elastic rubber ring 216. Since the elastic rubber ring 216 has elastic deformation capability, it can be tightly connected and installed in the cylinder hole of the support ring cylinder 22. The bottom cover 213 of the housing 21 hooks with the elastic hook 2161 of the elastic rubber ring 216 through its rigid hook 2131, so that the L-shaped elastic hook 2161 and the L-shaped rigid hook 2131 form a stable hook, thereby improving the sealing of the assembly. At the same time, the elastic rubber ring 216 has an elastic buffering effect, which can greatly reduce the grinding vibration amplitude, thereby reducing grinding noise and improving the user experience.

[0048] Furthermore, in this embodiment, the bottom cover 213 of the housing 21 protrudes with multiple rigid plates 21313. One rigid plate 21313 is connected to the inner side of a rigid hook 2131 near the drive shaft 25, and a protruding rib 21314 protrudes from the side of the rigid plate 21313 near the rigid hook 2131. The rib 21314 extends circumferentially in the housing 21. Each rigid hook 2131 includes a first rigid arm 21311 and a second rigid arm 21312 connected to each other. One end of the rigid arm 21311 away from the second rigid arm 21312 extends axially in the drive shaft 25 and is connected to the bottom cover 213 of the housing 21. The end of the second rigid arm 21312 away from the first rigid arm 21311 extends circumferentially in the housing 21. The height of the protrusion 21314 protruding from the rigid plate 21313 gradually decreases from the end near the first rigid arm 21311 toward the other end away from the first rigid arm 21311, and the protrusion 21314 presses against the elastic hook 2161. Therefore, a rigid plate 21313 is connected to the inner side of the rigid hook 2131 near the drive shaft 25, which strengthens the structural rigidity of the L-shaped rigid hook 2131, making the fit between the detachable L-shaped rigid hook 2131 and the L-shaped elastic hook 2161 more stable and reliable. Furthermore, a protruding rib 21314 is provided on the side of the rigid plate 21313 near the rigid hook 2131, extending circumferentially in the housing 21. Each rigid hook 2131 includes a first rigid arm 21311 and a second rigid arm 21312 connected together, with the first rigid arm 21311 located away from the second rigid arm 2131. One end of the 2 extends axially in the drive shaft 25 and is connected to the bottom cover 213 of the housing 21. The end of the second rigid arm 21312 away from the first rigid arm 21311 extends circumferentially in the housing 21. The height of the protrusion of the rib 21314 from the rigid plate 21313 gradually decreases from the end near the first rigid arm 21311 to the end away from the first rigid arm 21311. The rib 21314 presses against the elastic hook 2161. While ensuring the smoothness of the assembly process of the L-shaped rigid hook 2131 and the L-shaped elastic hook 2161, the assembly stability of the L-shaped rigid hook 2131 and the L-shaped elastic hook 2161 is improved.

[0049] In addition, the universal electric drive device 20 of this embodiment also includes a circuit board 28, which is disposed inside the housing 21 and electrically connected to the drive motor 27. The universal electric drive device 20 of this embodiment also includes a battery 215 and an elastic seal 29. The battery 215 is located inside the housing 21 and electrically connected to the circuit board 28. A charging head 281 is disposed on the circuit board 28. The top cover 212 of the housing 21 has a through groove 2121 corresponding to the charging head 281, and the top cover 212 also has a mounting hole 2. 122, the outer end face of the top cover 212 is provided with a limiting groove 2123 corresponding to the through groove 2121 and the mounting hole 2122. The elastic seal 29 can be inserted into the limiting groove 2123 with an interference fit. The inner side of the first end of the elastic seal 29 is provided with an elastic connecting rod 292. The end of the elastic connecting rod 292 is provided with an elastic mushroom head 293. The elastic mushroom head 293 passes through the mounting hole 2122 and is fastened to the inner end face of the top cover 212. The outer side of the second end of the elastic seal 29 is provided with a gripping part 291. When the battery 215 needs to be charged, the gripping part 291 on the elastic seal 29 is grasped, and the elastic seal 29 is pulled out from the limiting groove 2123. Because the elastic mushroom head 293 at the end of the elastic connecting rod 292 on the elastic seal 29 engages with the inner end face of the top cover 212, the elastic seal 29 is suspended on the housing 21. After the battery 215 is fully charged, the elastic seal 29 is interference-fitted into the limiting groove 2123 to seal the charging head 281, preventing the charging head 281 from being contaminated and affecting the charging performance. Furthermore, the presence of the battery 215 facilitates the carrying of the universal electric drive device 20 of this embodiment for outdoor use, thereby expanding its application range.

[0050] In addition, a push-button switch 283 is provided on the circuit board 28 of this embodiment. The top cover 212 of the housing 21 has a key hole 2125 corresponding to the push-button switch 283. The universal electric drive device 20 also includes a touch plate 2127. The touch plate 2127 is connected to the key hole 2125 by multiple arc-shaped elastic arms 2126. The multiple arc-shaped elastic arms 2126 are evenly distributed in the circumferential direction of the touch plate 2127, so that the touch plate 2127 is movably supported at the key hole 2125, making it easy to press the touch plate 2127 to press the push-button switch 283 on the circuit board 28 to control the operation of the universal electric drive device 20 of this embodiment. Due to the excellent elasticity of the arc-shaped elastic arms 2126, the touch plate 2127 can be stably reset. In order to facilitate user identification of operation, a button indicator plate 214 is provided on the outer side of the touch plate 2127 of this embodiment.

[0051] Furthermore, in this embodiment, the circuit board 28 is provided with a plurality of light-emitting elements 282, which are arranged side by side. The top cover 212 of the housing 21 is provided with a plurality of light-emitting holes 2128. Each light-emitting hole 2128 is correspondingly provided with one light-emitting element 282. The general electric drive device 20 also includes a light guide strip 210. The outer end face of the top cover 212 is provided with a positioning groove 2124 corresponding to the plurality of light-emitting holes 2128. The light guide strip 210 is located in the positioning groove 2124 and extends in the side-by-side direction of the plurality of light-emitting elements 282 to cover the plurality of light-emitting elements 282. Thus, the working status of the general electric drive device 20 in this embodiment can be quickly identified by the bright color displayed by the light guide strip 210.

[0052] Furthermore, in this embodiment, the housing 21 is composed of a shell cylinder 211, a top cover 212, and a bottom cover 213. The top cover 212 covers the top opening of the shell cylinder 211, and the bottom cover 213 covers the bottom opening of the shell cylinder 211, thereby forming a receiving cavity (not shown) between the shell cylinder 211, the top cover 212, and the bottom cover 213. The circuit board 28, the battery 215, and the drive motor 27 are located in this receiving cavity.

[0053] Second embodiment of coffee bean grinder:

[0054] As an explanation of the second embodiment of the coffee bean grinder of this utility model, the following description only focuses on the differences from the first embodiment of the coffee bean grinder.

[0055] See Figures 11 to 13 In this embodiment, the outer peripheral wall of the insertion end of the elastic sleeve 23' away from the housing 21 is provided with a plurality of grooves 231'. The plurality of grooves 231' are evenly distributed in the circumferential direction of the elastic sleeve 23', thereby improving the elastic deformation capability of the insertion end of the elastic sleeve 23', thereby ensuring that the insertion end of the elastic sleeve 23' can be smoothly and detachably fitted onto the grinding cup 11 of the grinding device 10. In addition, the inner peripheral wall of the elastic sleeve 23' in this embodiment is provided with a plurality of bosses 233'. The plurality of bosses 233' are evenly distributed in the circumferential direction of the elastic sleeve 23' and are staggered with the plurality of grooves 231' in the circumferential direction of the elastic sleeve 23'. The bosses 233' are used to detachably abut against the outer peripheral wall of the grinding cup 11, so that the elastic sleeve 23' is tightly fitted onto the grinding cup 11 of the grinding device 10.

[0056] Specifically, in this embodiment, the outer peripheral wall of the insertion end of the elastic sleeve 23' away from the housing 21 is inclined to form a restricted slope 232', and the inner peripheral wall of the limiting end of the limiting ring 24' is inclined to form a limiting slope 241'. The limiting slope 241' and the restricted slope 232' are adapted to abut against each other, and the limiting slope 241' protrudes from the restricted slope 232' in the axial direction of the limiting ring 24' to restrict the insertion end of the elastic sleeve 23' in the axial direction of the limiting ring 24', thereby limiting the elastic sleeve 23' to ensure the working reliability and stability of the limiting ring 24'.

[0057] Third embodiment of coffee bean grinder:

[0058] As an explanation of the third embodiment of the coffee bean grinder of this utility model, the following description only focuses on the differences from the first embodiment of the coffee bean grinder.

[0059] See Figure 14 and Figure 15 In this embodiment, the general-purpose electric drive device also includes a support ring 250' with an opening 2501'. Furthermore, in this embodiment, the elastic sleeve 23 has a second annular groove 234 on its retaining end face near the bottom cover 213, and the support ring 250' is located within the second annular groove 234. The retaining end face of the elastic sleeve 23 is provided with an open support ring 250', which provides elastic support to the retaining end of the elastic sleeve 23. This ensures that the retaining end of the elastic sleeve 23 has a certain elastic deformation capability while also having a stable hardness and shape, thereby ensuring that the retaining end of the elastic sleeve 23 can be smoothly and detachably fitted and held onto the grinding cup 11 of the grinding device 10.

[0060] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A general-purpose electric drive device, comprising a drive motor and a housing, wherein the drive motor is disposed within the housing, and a shaft hole is provided through the bottom cover of the housing, through which the drive shaft of the drive motor rotatably extends, characterized in that: The general electric drive device also includes a magnet and an elastic sleeve. The extension end of the drive shaft outside the housing has an adapter hole with a polygonal cross-section. The magnet is disposed at the bottom end of the adapter hole and is used to detachably fit onto the drive end of the grinding shaft of the grinding device. The magnet is used to detachably magnetically attract the drive end of the grinding shaft. The elastic sleeve is disposed on the bottom cover, and the elastic sleeve is used to detachably fit onto the grinding cup of the grinding device.

2. The universal electric drive device according to claim 1, characterized in that: The general-purpose electric drive device also includes a limiting ring cylinder, which is disposed on the bottom cover and sleeved on the outer peripheral wall of the elastic sleeve.

3. The universal electric drive device according to claim 2, characterized in that: The general-purpose electric drive device further includes a support ring with an opening; the inner peripheral wall of the elastic sleeve has a first annular groove, which is located near the insertion end of the elastic sleeve away from the housing, and the support ring is located in the first annular groove; or, the elastic sleeve has a second annular groove near the retaining end face of the bottom cover, and the support ring is located in the second annular groove. And / or, the limiting end of the limiting ring cylinder is provided with a limiting ring eave, the insertion end of the elastic sleeve away from the housing abuts against the limiting ring eave, and the inner peripheral wall of the elastic sleeve protrudes radially from the inner peripheral wall of the limiting ring eave.

4. The universal electric drive device according to claim 2, characterized in that: The elastic sleeve has multiple recesses on its outer peripheral wall away from the insertion end of the housing. The multiple recesses are evenly distributed in the circumferential direction of the elastic sleeve. The inner peripheral wall of the elastic sleeve has multiple protrusions. The multiple protrusions are evenly distributed in the circumferential direction of the elastic sleeve and are staggered with the multiple recesses in the circumferential direction of the elastic sleeve. The protrusions are used to detachably abut against the outer peripheral wall of the grinding cup. And / or, the outer peripheral wall of the elastic sleeve away from the insertion end of the housing is inclined to form a limiting slope, and the inner peripheral wall of the limiting end of the limiting ring is inclined to form a limiting slope. The limiting slope is adapted to abut against the limiting slope, and the limiting slope protrudes from the limiting slope in the axial direction of the limiting ring to restrict the insertion end of the elastic sleeve in the axial direction of the limiting ring.

5. The universal electric drive device according to claim 2, characterized in that: The general-purpose electric drive device also includes a support ring cylinder, which is disposed on the bottom cover, and the support end of the support ring cylinder away from the housing is used to detachably abut against the upper surface of the grinding cup; A connecting ring protrudes from the outer periphery of the support end of the support ring cylinder. The connecting end of the limiting ring cylinder is threaded onto the outer peripheral wall of the connecting ring. A limiting cavity is formed between the limiting end of the limiting ring cylinder and the connecting ring. The outer peripheral side of the elastic sleeve is confined within the limiting cavity.

6. The universal electric drive device according to claim 5, characterized in that: A limiting post is provided protruding from the upper outer peripheral wall of the connecting ring near the housing, and a limiting groove is provided on the connecting end of the limiting ring cylinder near the upper inner peripheral wall of the housing, and the limiting post is inserted into the limiting groove.

7. The universal electric drive device according to claim 5, characterized in that: The general-purpose electric drive device also includes an elastic rubber ring, which is located inside the cylinder hole of the support ring cylinder. The peripheral wall of the cylinder hole is provided with a rigid internal thread, and the outer peripheral wall of the elastic rubber ring is provided with an elastic external thread. The elastic external thread mates with the rigid internal thread. The inner circumferential wall of the elastic rubber ring is provided with a plurality of L-shaped elastic hooks, which are evenly distributed in the circumferential direction of the elastic rubber ring. The bottom cover is provided with a plurality of L-shaped rigid hooks, and one rigid hook engages with one elastic hook.

8. The universal electric drive device according to claim 7, characterized in that: The bottom cover has multiple rigid plates protruding from it. One of the rigid plates is connected to the inner side of a rigid hook near the drive shaft, and a protruding strip is provided on the side of the rigid plate near the rigid hook. The protruding strip extends in the circumferential direction of the housing. Each of the rigid hooks includes a first rigid arm and a second rigid arm connected together. The end of the first rigid arm away from the second rigid arm extends axially in the drive shaft and is connected to the bottom cover of the housing. The end of the second rigid arm away from the first rigid arm extends circumferentially in the housing. The height of the protrusion of the rib from the rigid plate gradually decreases from the end near the first rigid arm toward the end away from the first rigid arm, and the rib abuts against the elastic hook.

9. The universal electric drive device according to any one of claims 1 to 8, characterized in that: The general-purpose electric drive device also includes a circuit board, which is disposed inside the housing and electrically connected to the drive motor; The general-purpose electric drive device also includes a battery and an elastic seal. The battery is located inside the housing and electrically connected to the circuit board. A charging head is provided on the circuit board. The top cover of the housing has a through groove corresponding to the charging head and a mounting hole. A limiting groove is provided on the outer end face of the top cover corresponding to the through groove and the mounting hole. The elastic seal can be interference-fitted into the limiting groove. An elastic connecting rod is provided on the inner side of the first end of the elastic seal. An elastic mushroom head is provided at the end of the elastic connecting rod. The elastic mushroom head passes through the mounting hole and is fastened to the inner end face of the top cover. A gripping part is provided on the outer side of the second end of the elastic seal. And / or, the circuit board is provided with a push button switch, the top cover of the housing is provided with a key hole corresponding to the push button switch, the universal electric drive device also includes a touch plate, the touch plate is connected in the key hole by a plurality of arc-shaped elastic arms, and the plurality of arc-shaped elastic arms are evenly distributed in the circumferential direction of the touch plate; And / or, the circuit board is provided with a plurality of light-emitting elements, the plurality of light-emitting elements are arranged side by side, the top cover of the housing is provided with a plurality of light-emitting holes, one light-emitting hole is provided with a corresponding light-emitting element, the universal electric drive device further includes a light guide strip, the outer end face of the top cover is provided with a positioning groove corresponding to the plurality of light-emitting holes, the light guide strip is located in the positioning groove and extends in the side by side direction of the plurality of light-emitting elements to cover the plurality of light-emitting elements.

10. A coffee bean grinder, comprising a universal electric drive and a grinding device, characterized in that: The general-purpose electric drive device and the grinding device are detachably compatible. The general-purpose electric drive device is the general-purpose electric drive device described in any one of claims 1 to 9.

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