Lifting structure and coffee bean grinder with particle size adjusting function
By simplifying the assembly process with a lifting structure and automating particle size adjustment, the problem of insufficient applicability of traditional coffee grinders has been solved, enabling the production of coffee grinders that are highly efficient and manufactured at low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional coffee grinders have a fixed distance between the upper and lower grinding blades, which cannot meet the personalized needs of different consumers for the fineness, richness, and flavor of coffee. In addition, the large number of components in existing grinding devices leads to complicated assembly, low production efficiency, and high cost.
The device employs a lifting structure, including a mounting bracket and a lifting assembly. It is manufactured by integrally molding the ring-shaped follower with the lifting bracket, simplifying the assembly process. The lifting drive component drives the grinding component to adjust the particle size, and the sealing ring prevents dust from affecting the process, thus achieving automated adjustment.
It improves the production efficiency of coffee grinders and reduces production costs, while enhancing the precision and stability of particle size adjustment, thus improving the applicability and service life of coffee grinders.
Smart Images
Figure CN224055853U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of coffee grinders, and in particular to a lifting structure and a coffee grinder with a particle size degree adjusting function. BACKGROUND
[0002] Coffee beans are plant fruits used to make coffee. After coffee beans are processed into powder, various flavored beverages can be formed with the addition of sugar, milk, etc. In modern life, coffee is very popular among people. However, the distance between the upper grinding knife and the lower grinding knife of the traditional coffee grinder is fixed, so that the traditional coffee grinder can only grind coffee powder of a single particle size, which cannot meet the individual needs of different consumers for the fineness, richness and flavor of coffee, greatly reducing the applicability of the coffee grinder. To solve the above problems, some manufacturers have made further research and development.
[0003] The prior art such as patent CN219742460U proposes a grinding device and a coffee grinder with adjustable grinding fineness, which comprises a grinding seat, an outer cone knife assembly, an inner cone knife and an adjusting mechanism. The grinding seat is provided with a grinding cavity. The outer cone knife assembly and the inner cone knife are arranged in the grinding cavity. The outer cone knife assembly is sleeved outside the inner cone knife. The outer cone knife assembly comprises a knife seat, a knife holder and an outer cone knife. The outer cone knife is fixedly arranged on the knife holder. The knife holder is slidably arranged in the knife seat. The adjusting mechanism comprises an adjusting rod, an adjusting gear arranged on the adjusting rod and an outer toothed nut in gear engagement with the adjusting gear. The outer toothed nut is arranged in the knife seat and is in threaded transmission connection with the knife holder. The adjusting rod drives the adjusting gear to rotate. The rotation of the adjusting gear drives the outer toothed nut to rotate. The rotation of the outer toothed nut drives the knife holder to slide up and down, thereby adjusting the distance between the outer cone knife and the inner cone knife.
[0004] However, due to the large number of components of the grinding device and the need for separate assembly, the assembly process becomes complicated, resulting in a large difficulty in assembling the grinding device. This not only reduces the production efficiency of the grinding device, but also increases the production cost. CONTENT OF THE UTILITY MODEL
[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a lifting structure and a coffee grinder with a particle size degree adjusting function, which can not only improve production efficiency, but also reduce production cost.
[0006] The purpose of the present disclosure is achieved by the following technical solutions:
[0007] A lifting structure for installation in the body of a coffee grinder with a particle size degree adjusting function, comprising:
[0008] A mounting bracket for mounting and fixing in the body, a first end of the mounting bracket is formed with a receiving cavity, and a second end of the mounting bracket is formed with a threaded hole in communication with the receiving cavity.
[0009] A lifting assembly is arranged in the body, which comprises a lifting support and a lifting driving member. The lifting support is arranged in the mounting support. The fixed end of the lifting driving member is fixedly arranged outside the mounting support. The driving end of the lifting driving member is arranged in the accommodating cavity.
[0010] The outer peripheral wall of the first end of the lifting support is formed with an annular driven member. The second end of the lifting support is formed with a threaded abutting surface. The first end of the lifting support is arranged in the accommodating cavity. The outer peripheral wall of the driving end of the lifting driving member is formed with an annular driving member. The annular driving member is in transmission connection with the annular driven member. The second end of the lifting support is arranged in the threaded hole and is in threaded connection with the second end of the mounting support. The lifting support is arranged in rotational connection with the grinding member of the coffee bean grinder with the particle size adjustment function.
[0011] In one of the embodiments, the first end of the mounting support is formed with a connecting hole in communication with the accommodating cavity. The driving end of the lifting driving member is arranged in the connecting hole and in the accommodating cavity.
[0012] In one of the embodiments, the annular driven member is an annular driven gear. The annular driving member is an annular driving gear. The annular driven gear and the annular driving gear are in meshing connection with each other.
[0013] In one of the embodiments, the lifting driving member comprises a driving motor and a transmission member. The fixed end of the lifting driving member is arranged on the driving motor. The driving end of the lifting driving member is arranged on the transmission member. The driving motor is fixedly arranged on the mounting support. The power output end of the driving motor is fixedly connected with the transmission member. The transmission member is arranged in the connecting hole and in the accommodating cavity. The annular driving member is formed on the outer peripheral wall of the transmission member.
[0014] A coffee bean grinder with a particle size adjustment function comprises a body, a grinding member and the lifting structure according to any one of the embodiments. The mounting support is fixedly arranged in the body. The lifting support is arranged in rotational connection with the grinding member of the coffee bean grinder with the particle size adjustment function.
[0015] In one of the embodiments, the coffee bean grinder with the particle size adjustment function further comprises a grinding support and a sealing ring. The grinding support is fixedly arranged in the body. The outer peripheral wall of the first end of the grinding support is formed with an annular limiting groove. The sealing ring is arranged in the annular limiting groove. The outer peripheral wall of the sealing ring is in interference abutment with the inner peripheral wall of the second end of the mounting support. The inner peripheral wall of the sealing ring is in interference abutment with the inner wall of the annular limiting groove.
[0016] In one of the embodiments, the inner circumferential wall of the second end of the grinding support is provided with an upper grinding blade, the outer circumferential wall of the first end of the grinding piece is formed with a lower grinding blade matched with the upper grinding blade, the first end of the grinding support is formed with a first avoiding hole, the grinding piece is arranged in the first avoiding hole, the second end of the grinding piece is rotationally connected with the lifting support, the first end of the grinding piece is arranged in the second end of the grinding support, and the upper grinding blade is arranged opposite to the lower grinding blade.
[0017] In one of the embodiments, the lifting support is further formed with a second avoiding hole, the hole wall of the second avoiding hole is formed with an annular flange, the second end of the grinding piece is formed with an annular clamping groove arranged corresponding to the annular flange, the second end of the grinding piece is arranged in the second avoiding hole, and the annular flange is clamped in the annular clamping groove and in sliding abutment with the inner wall of the annular clamping groove.
[0018] In one of the embodiments, the coffee bean grinder with the particle size degree adjusting function further comprises a rotary driving piece, the rotary driving piece is fixedly arranged on the mounting support, the first end of the mounting support is formed with a third avoiding hole, the second end of the grinding piece is arranged in the third avoiding hole and connected with the power output end of the rotary driving piece, and the rotary driving piece is used to drive the grinding piece to rotate relative to the lifting support.
[0019] In one of the embodiments, the power output end of the rotary driving piece is formed with a rotary limiting groove, the second end of the grinding piece is arranged in the rotary limiting groove, and the outer circumferential wall of the second end of the grinding piece is in sliding limiting abutment with the inner wall of the rotary limiting groove, so that the lifting assembly drives the grinding piece to slide up and down relative to the inner wall of the rotary limiting groove.
[0020] Compared with the prior art, the present disclosure has at least the following advantages:
[0021] The lifting structure described above has the following advantages: the outer circumferential wall of the first end of the lifting support is formed with an annular driven piece, the second end of the lifting support is formed with a threaded abutment surface, the first end of the lifting support is arranged in the accommodating cavity, the outer circumferential wall of the driving end of the lifting driving piece is formed with an annular driving piece, the annular driving piece is in transmission connection with the annular driven piece, the second end of the lifting support is arranged in the threaded hole and in threaded connection with the second end of the mounting support, the lifting support is used to rotationally connect with the grinding piece of the coffee bean grinder with the particle size degree adjusting function, compared with the grinding device in the related art, the lifting structure of the present disclosure is integrally formed with the annular driven piece and the lifting support, effectively reducing the assembly process of the lifting structure of the present disclosure, greatly improving the production efficiency of the coffee bean grinder with the particle size degree adjusting function, and reducing the production cost of the coffee bean grinder with the particle size degree adjusting function. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the internal structure of a coffee grinder with particle size adjustment function according to an embodiment.
[0024] Figure 2 for Figure 1 A partially enlarged schematic diagram of a coffee grinder with particle size adjustment function is shown.
[0025] Figure 3 for Figure 1 Another enlarged schematic diagram of a coffee grinder with particle size adjustment function is shown.
[0026] Figure 4 for Figure 1 A partial structural diagram of a coffee grinder with particle size adjustment function is shown.
[0027] Figure 5 This is a schematic diagram of a coffee grinder with particle size adjustment function. Detailed Implementation
[0028] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.
[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0031] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below in combination with specific embodiments:
[0032] As Figures 1 to 5As shown, the lifting structure 100 of one embodiment is used to be installed in the body 200 of the coffee bean grinder 10 with the particle size adjustment function. The lifting structure 100 comprises a mounting bracket 110 and a lifting assembly 120; the mounting bracket 110 is used to be installed and fixed in the body 200, the first end of the mounting bracket 110 is formed with a receiving cavity 111, and the second end of the mounting bracket 110 is formed with a threaded hole 112 in communication with the receiving cavity 111; the lifting assembly 120 is used to be installed in the body 200, and the lifting assembly 120 comprises a lifting bracket 121 and a lifting driving piece 122, the lifting bracket 121 is arranged in the mounting bracket 110, the fixed end of the lifting driving piece 122 is installed and fixed outside the mounting bracket 110, and the driving end of the lifting driving piece 122 is arranged in the receiving cavity 111; the outer peripheral wall of the first end of the lifting bracket 121 is formed with an annular driven part 1211, the second end of the lifting bracket 121 is formed with a threaded abutting surface 1212, the first end of the lifting bracket 121 is arranged in the receiving cavity 111, the outer peripheral wall of the driving end of the lifting driving piece 122 is formed with an annular driving part 1221, the annular driving part 1221 is in transmission connection with the annular driven part 1211, the second end of the lifting bracket 121 is arranged in the threaded hole 112 and is in threaded connection with the second end of the mounting bracket 110, and the lifting bracket 121 is used to be rotationally connected with the grinding part 300 of the coffee bean grinder 10 with the particle size adjustment function. It can be understood that, since the annular driving part 1221 is in transmission connection with the annular driven part 1211, the lifting driving piece 122 can drive the annular driving part 1221 to rotate relative to the mounting bracket 110, so as to drive the annular driven part 1211 to rotate relative to the mounting bracket 110, so that the annular driven part 1211 can drive the whole lifting bracket 121 to rotate relative to the mounting bracket 110, and then the lifting driving piece 122 can drive the lifting bracket 121 to rotate relative to the mounting bracket 110; since the second end of the lifting bracket 121 is arranged in the threaded hole 112 and is in threaded connection with the second end of the mounting bracket 110, when the lifting driving piece 122 drives the lifting bracket 121 to rotate relative to the mounting bracket 110 in a first direction, the lifting bracket 121 can ascend relative to the mounting bracket 110 and drive the grinding part 300 to ascend relative to the body 200; when the lifting driving piece 122 drives the lifting bracket 121 to rotate relative to the mounting bracket 110 in a second direction, the lifting bracket 121 can descend relative to the mounting bracket 110 and drive the grinding part 300 to descend relative to the body 200.
[0033] As Figures 1 to 5As shown, further, compared with the grinding device in the above-mentioned related technologies, the lifting structure 100 of this disclosure is manufactured by integrally molding the annular follower 1211 and the lifting bracket 121, which effectively reduces the assembly process of the lifting structure 100 of this disclosure, greatly improves the production efficiency of the coffee grinder 10 with particle size adjustment function, and can also reduce the production cost of the coffee grinder 10 with particle size adjustment function.
[0034] In this embodiment, when the height of the grinding piece 300 is adjusted, firstly, the lifting drive 122 is controlled to drive the annular follower 1211 to rotate relative to the mounting bracket 110 in a preset direction; then, the annular follower 1211 will drive the entire lifting bracket 121 to rotate relative to the mounting bracket 110 in a preset direction, so that the lifting bracket 121 can rise or fall relative to the mounting bracket 110, and thus the lifting bracket 121 can drive the grinding piece 300 to rise or fall relative to the machine body 200.
[0035] The aforementioned lifting structure 100 has an annular driven member 1211 formed on the outer peripheral wall of the first end of the lifting bracket 121, and a threaded abutment surface 1212 formed on the second end of the lifting bracket 121. The first end of the lifting bracket 121 is disposed within the receiving cavity 111. An annular driving member 1221 is formed on the outer peripheral wall of the driving end of the lifting drive member 122. The annular driving member 1221 is connected to the annular driven member 1211 in a transmission manner. The second end of the lifting bracket 121 is disposed within the threaded hole 112 and threaded with the second end of the mounting bracket 110. The lifting bracket 121 is used to rotatably connect with the grinding element 300 of the coffee grinder 10 with particle size adjustment function. Compared with the grinding device in the above-mentioned related technologies, the lifting structure 100 of this disclosure effectively reduces the assembly process of the lifting structure 100 by integrally molding the annular follower 1211 and the lifting bracket 121, greatly improves the production efficiency of the coffee grinder 10 with particle size adjustment function, and can also reduce the production cost of the coffee grinder 10 with particle size adjustment function.
[0036] like Figure 2 As shown, in one embodiment, the first end of the mounting bracket 110 is formed with a connecting hole 113 communicating with the receiving cavity 111. The driving end of the lifting drive member 122 passes through the connecting hole 113 and is disposed in the receiving cavity 111, so that the driving end of the lifting drive member 122 can be located in the receiving cavity 111, so that the lifting drive member 122 can drive the lifting bracket 121 to rotate relative to the mounting bracket 110.
[0037] like Figure 2 and Figure 4As shown, in one embodiment, the annular follower 1211 is an annular follower tooth, and the annular actuator 1221 is an annular actuator tooth. The annular follower tooth and the annular actuator tooth mesh with each other so that the annular actuator 1221 can better drive the annular follower 1211 to rotate relative to the mounting bracket 110, which greatly improves the stability of the coffee grinder 10 with particle size adjustment function, and also improves the height adjustment accuracy of the grinding piece 300.
[0038] For example, 2 to Figure 4 As shown, in one embodiment, the lifting drive 122 includes a drive motor 1222 and a transmission component 1223. The fixed end of the lifting drive 122 is disposed on the drive motor 1222, and the driving end of the lifting drive 122 is disposed on the transmission component 1223. The drive motor 1222 is mounted and fixed on the mounting bracket 110. The power output end of the drive motor 1222 is fixedly connected to the transmission component 1223. The transmission component 1223 passes through the connecting hole 113 and is disposed in the receiving cavity 111. The annular driving component 1221 is formed on the outer peripheral wall of the transmission component 1223 so that the drive motor 1222 can drive the annular driving component. The member 1221 rotates relative to the mounting bracket 110. At the same time, the annular driving member 1221 can also drive the lifting bracket 121 to rotate relative to the mounting bracket 110 through the annular driven member 1211. When the lifting bracket 121 rotates relative to the mounting bracket 110, the lifting bracket 121 can rise or fall relative to the mounting bracket 110, so that the drive motor 1222 can drive the lifting bracket 121 to rise or fall relative to the mounting bracket 110, which greatly improves the automation level of the coffee grinder 10 with particle size adjustment function, and thus improves the ease of use of the coffee grinder 10 with particle size adjustment function.
[0039] like Figures 1 to 5 As shown, this disclosure also provides a coffee grinder 10 with particle size adjustment function, including a body 200, a grinding element 300 and a lifting structure 100 as described in any of the above embodiments. The mounting bracket 110 is installed and fixed inside the body 200, and the lifting bracket 121 is rotatably connected to the grinding element 300 of the coffee grinder 10 with particle size adjustment function.
[0040] like Figures 3 to 4As shown in the drawings, in one embodiment, the coffee grinder 10 with the particle size adjustment function further comprises a grinding support 400 and a sealing ring 500. The grinding support 400 is fixedly installed in the machine body 200. An outer peripheral wall of a first end of the grinding support 400 is formed with an annular limiting groove 410. The sealing ring 500 is arranged in the annular limiting groove 410. An outer peripheral wall of the sealing ring 500 is in interference abutment with an inner peripheral wall of a second end of the mounting support 110. An inner peripheral wall of the sealing ring 500 is in interference abutment with an inner wall of the annular limiting groove 410. This prevents the coffee powder from entering the accommodating cavity 111 through the gap between the first end of the grinding support 400 and the second end of the mounting support 110, effectively avoids the influence of the coffee powder adhering to the surfaces of the annular driven member 1211 and the annular driving member 1221 on the normal operation of the lifting structure 100, and thus ensures the normal operation and long-term stability of the coffee grinder 10 with the particle size adjustment function, greatly prolonging the service life of the coffee grinder 10 with the particle size adjustment function.
[0041] As shown in the drawings, Figures 1 to 3 In one embodiment, an inner peripheral wall of a second end of the grinding support 400 is provided with an upper grinding blade 420. An outer peripheral wall of a first end of the grinding member 300 is formed with a lower grinding blade 310 matched with the upper grinding blade 420. A first avoiding hole 430 is formed in the first end of the grinding support 400. The grinding member 300 is arranged in the first avoiding hole 430. A second end of the grinding member 300 is rotationally connected with the lifting support 121. The first end of the grinding member 300 is arranged in the second end of the grinding support 400. The upper grinding blade 420 is arranged opposite to the lower grinding blade 310. When the lifting driving member 122 drives the lifting support 121 to ascend or descend relative to the mounting support 110, the lifting support 121 can drive the second end of the grinding member 300 to ascend or descend relative to the grinding support 400. This enables the lifting driving member 122 to adjust the distance between the upper grinding blade 420 and the lower grinding blade 310. Thus, the coffee grinder 10 with the particle size adjustment function can grind coffee powder with different particle sizes according to the needs of users, greatly improving the applicability of the coffee grinder 10 with the particle size adjustment function.
[0042] As shown in the drawings, Figures 2 to 4As shown, in one embodiment, the lifting support 121 is further formed with a second avoiding hole 1213, a hole wall of the second avoiding hole 1213 is formed with an annular flange 1214, a second end of the grinding piece 300 is formed with an annular clamping groove 320 arranged correspondingly with the annular flange 1214, the second end of the grinding piece 300 is arranged in the second avoiding hole 1213, and the annular flange 1214 is clamped in the annular clamping groove 320, so that the lifting support 121 can drive the grinding piece 300 to ascend or descend relative to the grinding support 400, to adjust the distance between the upper grinding knife 420 and the lower grinding knife 310; the annular flange 1214 and the inner wall of the annular clamping groove 320 slide against each other, so that the grinding piece 300 can rotate relative to the lifting support 121, and drive the lower grinding knife 310 to rotate relative to the upper grinding knife 420, to grind the coffee beans.
[0043] As shown, Figures 2 to 3 In one embodiment, the coffee bean grinder 10 with the particle size adjusting function further comprises a rotary driving piece 600, the rotary driving piece 600 is fixedly installed on the mounting support 110, a first end of the mounting support 110 is formed with a third avoiding hole 114, a second end of the grinding piece 300 is arranged in the third avoiding hole 114 and connected with a power output end of the rotary driving piece 600, so that the rotary driving piece 600 drives the grinding piece 300 to rotate relative to the lifting support 121, so that the rotary driving piece 600 can drive the grinding piece 300 to rotate relative to the grinding support 400, so that the lower grinding knife 310 can rotate relative to the upper grinding knife 420, to grind the coffee beans.
[0044] As shown, Figures 2 to 4 In one embodiment, a power output end of the rotary driving piece 600 is formed with a rotation limiting groove 610, the second end of the grinding piece 300 is arranged in the rotation limiting groove 610, and the outer peripheral wall of the second end of the grinding piece 300 slide-limitingly abuts against the inner wall of the rotation limiting groove 610, the lifting assembly 120 is used to drive the grinding piece 300 to slide up and down relative to the inner wall of the rotation limiting groove 610, so that the rotary driving piece 600 can drive the grinding piece 300 to rotate relative to the grinding support 400, and at the same time, the lifting assembly 120 can also drive the grinding piece 300 to ascend or descend relative to the grinding support 400, to adjust the distance between the upper grinding knife 420 and the lower grinding knife 310.
[0045] Compared with the prior art, the present disclosure has at least the following advantages:
[0046] The coffee grinder 10 with the particle size adjustment function has the following advantages. The outer peripheral wall of the first end of the lifting support 121 is formed with the annular driven part 1211, the second end of the lifting support 121 is formed with the threaded abutting surface 1212, the first end of the lifting support 121 is arranged in the accommodating cavity 111, the outer peripheral wall of the driving end of the lifting driving part 122 is formed with the annular driving part 1221, the annular driving part 1221 is in transmission connection with the annular driven part 1211, the second end of the lifting support 121 is arranged in the threaded hole 112 and is in threaded connection with the second end of the mounting support 110, the lifting support 121 is used to be rotationally connected with the grinding part 300 of the coffee grinder 10 with the particle size adjustment function, compared with the grinding device in the related art, the lifting structure 100 of the present disclosure is integrally formed with the annular driven part 1211 and the lifting support 121, which effectively reduces the assembly process of the lifting structure 100 of the present disclosure, greatly improves the production efficiency of the coffee grinder 10 with the particle size adjustment function, and also can reduce the production cost of the coffee grinder 10 with the particle size adjustment function.
[0047] The above-described embodiments only express several embodiments of the present disclosure, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the disclosed patent. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, which are all within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.
Claims
1. A lifting structure for installation in a body of a coffee bean grinder having a particle size adjustment function, comprising: a mounting bracket for mounting and fixing in the body, a first end of the mounting bracket being formed with a receiving cavity, and a second end of the mounting bracket being formed with a threaded hole in communication with the receiving cavity; a lifting assembly for installation in the body, the lifting assembly comprising a lifting bracket and a lifting drive, the lifting bracket being arranged in the mounting bracket, and a fixed end of the lifting drive being mounted and fixed outside the mounting bracket, and a driving end of the lifting drive being arranged in the receiving cavity; characterized in that an outer peripheral wall of a first end of the lifting bracket is formed with an annular driven element, a second end of the lifting bracket is formed with a threaded abutting surface, the first end of the lifting bracket is arranged in the receiving cavity, an outer peripheral wall of the driving end of the lifting drive is formed with an annular driving element, the annular driving element is in transmission connection with the annular driven element, the second end of the lifting bracket is arranged in the threaded hole and is in threaded connection with the second end of the mounting bracket, and the lifting bracket is arranged in rotational connection with a grinding element of the coffee bean grinder having the particle size adjustment function. The first end of the mounting bracket is formed with a connecting hole in communication with the receiving cavity, and the driving end of the lifting drive is arranged in the connecting hole and in the receiving cavity. The annular driven element is an annular driven tooth, and the annular driving element is an annular driving tooth, the annular driven tooth and the annular driving tooth are in meshing connection with each other. The lifting drive comprises a driving motor and a transmission element, the fixed end of the lifting drive is arranged on the driving motor, the driving end of the lifting drive is arranged on the transmission element, the driving motor is mounted and fixed on the mounting bracket, a power output end of the driving motor is in fixed connection with the transmission element, the transmission element is arranged in the connecting hole and in the receiving cavity, and the annular driving element is formed on an outer peripheral wall of the transmission element.
2. The lifting structure of claim 1, wherein, The coffee bean grinder having the particle size adjustment function further comprises a grinding bracket and a sealing ring, the grinding bracket is mounted and fixed in the body, an outer peripheral wall of a first end of the grinding bracket is formed with an annular limiting groove, the sealing ring is arranged in the annular limiting groove, an outer peripheral wall of the sealing ring is in interference abutment with an inner peripheral wall of the second end of the mounting bracket, and an inner peripheral wall of the sealing ring is in interference abutment with an inner wall of the annular limiting groove.
3. The lifting structure of claim 1, wherein, 4. The lifting structure of claim 2, wherein, 5. A coffee bean grinder having a particle size adjustment function, characterized by comprising: a coffee bean grinder according to any one of claims 1 to 4; and a particle size adjustment mechanism for adjusting the particle size of the coffee powder. 6. The coffee bean grinder with a particle size adjustment function according to claim 5, wherein 7. The coffee bean grinder with a particle size adjustment function according to claim 6, wherein The inner circumferential wall of the second end of the grinding support is provided with an upper grinding blade, the outer circumferential wall of the first end of the grinding piece is formed with a lower grinding blade matched with the upper grinding blade, the first end of the grinding support is formed with a first avoiding hole, the grinding piece is arranged in the first avoiding hole, the second end of the grinding piece is rotationally connected with the lifting support, the first end of the grinding piece is arranged in the second end of the grinding support, and the upper grinding blade is arranged opposite to the lower grinding blade.
8. The coffee bean grinder with a particle size adjustment function according to claim 7, wherein The lifting support is further formed with a second avoiding hole, the hole wall of the second avoiding hole is formed with an annular flange, the second end of the grinding piece is formed with an annular clamping groove arranged corresponding to the annular flange, the second end of the grinding piece is arranged in the second avoiding hole, and the annular flange is clamped in the annular clamping groove and in sliding abutment with the inner wall of the annular clamping groove.
9. The coffee bean grinder with a particle size adjustment function according to claim 8, wherein The coffee bean grinder with the particle size adjusting function further comprises a rotary driving piece, the rotary driving piece is fixedly installed on the mounting support, the first end of the mounting support is formed with a third avoiding hole, the second end of the grinding piece is arranged in the third avoiding hole and connected with the power output end of the rotary driving piece, so that the rotary driving piece drives the grinding piece to rotate relative to the lifting support.
10. The coffee bean grinder with a particle size adjustment function according to claim 9, wherein The power output end of the rotary driving piece is formed with a rotation limiting groove, the second end of the grinding piece is arranged in the rotation limiting groove, and the outer circumferential wall of the second end of the grinding piece is in sliding limiting abutment with the inner wall of the rotation limiting groove, and the lifting assembly is used for driving the grinding piece to slide up and down relative to the inner wall of the rotation limiting groove.