Driving connection structure and coffee grinder

Abstract

The utility model provides a driving connection structure and a coffee grinder. The driving connection structure comprises a supporting assembly, a grinding driving piece and a grinding piece. The supporting assembly is used for being installed and fixed in the first end of a coffee grinder body, and an avoiding hole is formed in the first end of the supporting assembly. The fixed end of the grinding driving piece is used for being installed and fixed to a grinding machine body. The first end of the grinding piece is arranged in the avoiding hole and is opposite to the driving end of the grinding driving piece; the first end of the connecting sleeve is arranged at the driving end of the grinding driving piece in a sleeving mode, the second end of the connecting sleeve is arranged at the first end of the grinding piece in a sleeving mode, a first avoiding gap exists between the end portion of the first end of the grinding piece and the driving end of the grinding driving piece, and a second avoiding gap exists between the outer circumferential wall of the first end of the grinding piece and the inner circumferential wall of the connecting sleeve. The driving connection structure not only can prolong the service life of the coffee grinder, but also can improve the grinding efficiency and the use stability of the coffee grinder.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of coffee grinders, and particularly to a driving connection structure and a coffee grinder. BACKGROUND

[0002] In the related art, most coffee grinders are designed to directly fix the grinding rod to the power output end of the driving motor to ensure that the driving motor can effectively drive the grinding rod to rotate relative to the coffee grinder body, thereby completing the grinding of coffee beans.

[0003] However, in actual use, the hardness of coffee beans varies, which causes uneven distribution of forces on the grinding rod during grinding, and may cause slight tilting. This tilting increases the stress concentration at the connection part between the power output end of the driving motor and the grinding rod, easily causing damage or damage to the grinding rod and even the driving motor, greatly shortening the service life of the coffee grinder, and increasing the risk of grinding rod jamming, which seriously reduces the grinding efficiency and use stability of the coffee grinder. CONTENT OF THE INVENTION

[0004] The purpose of the present disclosure is to overcome the shortcomings in the prior art, and to provide a driving connection structure and a coffee grinder which not only has a longer service life, but also has better grinding efficiency and use stability.

[0005] The purpose of the present disclosure is achieved by the following technical solutions:

[0006] A driving connection structure for installation in a grinder body of a coffee grinder, comprising a support assembly, a grinding driving member and a grinding member;

[0007] The support assembly is used to be fixed to the coffee grinder body, and a clearance hole is formed at the first end of the support assembly. The fixed end of the grinding driving member is used to be fixed to the grinder body, and the driving end of the grinding driving member is arranged in the clearance hole. The grinding member is arranged in the coffee grinder body, the first end of the grinding member is arranged in the clearance hole and is arranged opposite to the driving end of the grinding driving member, the first end of the grinding member is rotatably connected to the support assembly, and the second end of the grinding member is used to be arranged at the second end of the coffee grinder body. The grinding member is used to grind coffee beans in the grinder body.

[0008] The driving connection structure further comprises a connecting sleeve, the connecting sleeve is arranged in the avoiding hole, a first end of the connecting sleeve is sleeved on the driving end of the grinding driving member, a second end of the connecting sleeve is sleeved on the first end of the grinding member, and the first end of the grinding member and the driving end of the grinding driving are both limited in the connecting sleeve, so that the grinding driving member drives the grinding member to rotate relative to the support assembly through the connecting sleeve; a first avoiding gap exists between the first end of the grinding member and the driving end of the grinding driving member, and a second avoiding gap exists between the outer peripheral wall of the first end of the grinding member and the inner peripheral wall of the connecting sleeve.

[0009] In one of the embodiments, the grinding driving member comprises a grinding driving motor and a transmission rod, a fixed end of the grinding driving member is arranged on the grinding driving motor, a driving end of the grinding driving member is arranged on the transmission rod, the grinding driving motor is arranged on the coffee grinder body, a first end of the transmission rod is fixedly connected with a power output end of the grinding driving motor, a second end of the transmission rod is arranged in the avoiding hole, a first end of the connecting sleeve is sleeved on the second end of the transmission rod, and the second end of the transmission rod is limited in the connecting sleeve, and the second end of the transmission rod is arranged in a spaced manner relative to the first end of the grinding member to form the first avoiding gap.

[0010] In one of the embodiments, the connecting sleeve comprises a sleeve body and a connecting rod, a first end of the sleeve body is sleeved on the second end of the transmission rod, a second end of the sleeve body is sleeved on the first end of the grinding member, and the first end of the grinding member and the second end of the transmission rod are both limited in the sleeve body; the connecting rod is arranged in the sleeve body, and both ends of the connecting rod are fixedly connected with the inner peripheral wall of the sleeve body, the second end of the transmission rod is formed with a connecting hole, and the connecting rod is arranged in the connecting hole, so that the connecting sleeve is fixed on the transmission rod.

[0011] In one of the embodiments, the sleeve body and the connecting rod are an integral structure.

[0012] In one of the embodiments, the second end of the support assembly is further formed with a first limiting hole, the driving connection structure further comprises a connecting bearing, the connecting bearing is arranged in the first limiting hole, the connecting bearing is sleeved on the first end of the grinding member, the outer peripheral wall of the connecting bearing is fixedly connected with the inner peripheral wall of the first limiting hole, and the inner peripheral wall of the connecting bearing is in sliding limiting abutment with the outer peripheral wall of the first end of the grinding member.

[0013] In one of the embodiments, the connecting bearing includes a first connecting bearing and a second connecting bearing, both of which are sleeved on the first end of the grinding piece, the outer peripheral wall of the first connecting bearing and the outer peripheral wall of the second connecting bearing are fixedly connected with the inner peripheral wall of the first limiting hole, the inner peripheral wall of the first connecting bearing and the inner peripheral wall of the second connecting bearing are slidingly limitedly abutted with the outer peripheral wall of the first end of the grinding piece, and the first connecting bearing and the second connecting bearing are arranged at intervals along the length direction of the grinding piece.

[0014] In one of the embodiments, the connecting sleeve is a stainless steel sleeve or an aluminum alloy sleeve.

[0015] In one of the embodiments, the first clearance gap is greater than or equal to 1.5 mm, and the second clearance gap ranges from 0.15 mm to 0.3 mm.

[0016] In one of the embodiments, the connecting sleeve is formed with a second limiting hole, and the driving end of the grinding driving piece and the first end of the grinding piece are arranged in the second limiting hole, so that the grinding driving piece drives the grinding piece to rotate relative to the support assembly through the connecting sleeve.

[0017] A coffee grinder includes a grinder main body and the driving connection structure according to any one of the above embodiments, the support assembly is fixedly installed in the coffee grinder main body, and the fixed end of the grinding driving piece is fixedly installed on the grinder main body.

[0018] Compared with the prior art, the present disclosure has at least the following advantages:

[0019] The driving connection structure described above has the following advantages. The connecting sleeve is arranged in the clearance hole, the first end of the connecting sleeve is sleeved on the driving end of the grinding driving piece, the second end of the connecting sleeve is sleeved on the first end of the grinding piece, and the first end of the grinding piece and the driving end of the grinding driving piece are both limited in the connecting sleeve, so that the grinding driving piece drives the grinding piece to rotate relative to the support assembly through the connecting sleeve. There is a first clearance gap between the end of the first end of the grinding piece and the driving end of the grinding driving piece, and there is a second clearance gap between the outer peripheral wall of the first end of the grinding piece and the inner peripheral wall of the connecting sleeve. When the grinding piece is slightly tilted due to uneven force, the first clearance gap and the second clearance gap can provide clearance space for the tilt of the grinding piece, so as to weaken the stress concentration of the connecting part between the grinding piece and the connecting sleeve, greatly reducing the possibility of damage or even damage of the grinding piece and the grinding driving piece, thereby prolonging the service life of the coffee grinder, greatly reducing the possibility of jamming of the grinding piece, and improving the grinding efficiency and use stability of the coffee grinder. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present disclosure, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 The internal structure diagram of a coffee grinder of an embodiment;

[0022] Figure 2 The internal structure diagram of a coffee grinder of an embodiment; Figure 1 The partial enlarged diagram of the coffee grinder shown in FIG. 4;

[0023] Figure 3 The partial structure diagram of the coffee grinder shown in FIG. 4; Figure 1 The partial structure diagram of the coffee grinder shown in FIG. 4;

[0024] Figure 4 The internal structure diagram of a structure model of a coffee grinder. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present disclosure can be more thoroughly and completely understood.

[0026] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can 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 can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0027] 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 of the disclosure 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.

[0028] 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:

[0029] AsFigures 1 to 4 As shown, a drive connection structure 100 of one embodiment is used to be installed in the grinder body 200 of a coffee grinder 10. It includes a support assembly 110, a grinding drive 120, and a grinding component 130. The support assembly 110 is used to be fixed to the coffee grinder body 10, and a clearance hole 111 is formed at its first end. The fixed end of the grinding drive 120 is used to be fixed to the grinder body 200, and the driving end of the grinding drive 120 is located in the clearance hole 111. The grinding component 130 is disposed in the coffee grinder body 10, with its first end located in the clearance hole 111 and opposite to the driving end of the grinding drive 120. The first end of the grinding component 130 is rotatably connected to the support assembly 110. The second end of the grinding component 130... The grinding element 130 is used to grind coffee beans inside the main body of the coffee grinder 10. The drive connection structure 100 also includes a connecting sleeve 140, which is disposed in the clearance hole 111. The first end of the connecting sleeve 140 is sleeved on the drive end of the grinding drive 120, and the second end of the connecting sleeve 140 is sleeved on the first end of the grinding element 130. Both the first end of the grinding element 130 and the drive end of the grinding drive are confined within the connecting sleeve 140, so that the grinding drive 120 drives the grinding element 130 to rotate relative to the support assembly 110 through the connecting sleeve 140, so that the grinding element 130 can rotate relative to the main body of the grinder 200 to grind coffee beans inside the main body of the grinder 200.

[0030] like Figures 1 to 4 As shown, further, there is a first clearance gap 150 between the first end of the grinding element 130 and the driving end of the grinding drive 120, and a second clearance gap 160 between the outer peripheral wall of the first end of the grinding element 130 and the inner peripheral wall of the connecting sleeve 140. This allows the first clearance gap 150 and the second clearance gap 160 to provide clearance space for the tilting of the grinding element 130 when the grinding element 130 tilts slightly due to uneven force. This reduces the stress concentration at the connection between the grinding element 130 and the connecting sleeve 140, greatly reducing the possibility of damage or even destruction to the grinding element 130 and the grinding drive 120, thereby extending the service life of the coffee grinder 10. It also greatly reduces the possibility of the grinding element 130 jamming, improving the grinding efficiency and operational stability of the coffee grinder 10.

[0031] In the embodiment, when the grinding member 130 is grinding coffee beans, the grinding member 130 is subjected to uneven stress due to the hardness difference of each coffee bean, so that the grinding member 130 is prone to slight tilting. The first and second relief gaps can weaken the stress concentration of the connection between the grinding member 130 and the connecting sleeve 140 by providing relief space for the tilting of the grinding member 130, greatly reducing the possibility of damage or even damage of the grinding member 130 and the grinding drive member 120, and greatly reducing the possibility of jamming of the grinding member 130.

[0032] The above-mentioned driving connection structure 100, since the connecting sleeve 140 is arranged in the relief hole 111, the first end of the connecting sleeve 140 is sleeved on the driving end of the grinding drive member 120, the second end of the connecting sleeve 140 is sleeved on the first end of the grinding member 130, and the first end of the grinding member 130 and the driving end of the grinding drive are both limited in the connecting sleeve 140, so that the grinding drive member 120 drives the grinding member 130 to rotate relative to the support assembly 110 through the connecting sleeve 140; there is a first relief gap 150 between the first end of the grinding member 130 and the driving end of the grinding drive member 120, and there is a second relief gap 160 between the outer peripheral wall of the first end of the grinding member 130 and the inner peripheral wall of the connecting sleeve 140, so that when the grinding member 130 is subjected to uneven stress and the grinding member 130 is slightly tilted, the first and second relief gaps 150 and 160 can provide relief space for the tilting of the grinding member 130, to weaken the stress concentration of the connection between the grinding member 130 and the connecting sleeve 140, greatly reducing the possibility of damage or even damage of the grinding member 130 and the grinding drive member 120, thereby prolonging the service life of the coffee grinder 10, greatly reducing the possibility of jamming of the grinding member 130, and improving the grinding efficiency and use stability of the coffee grinder 10.

[0033] As Figures 1 to 2As shown in the drawings, in one embodiment, the grinding driving member 120 includes a grinding driving motor 121 and a transmission rod 122, the fixed end of the grinding driving member 120 is arranged at the grinding driving motor 121, and the driving end of the grinding driving member 120 is arranged at the transmission rod 122. The grinding driving motor 121 is arranged to be fixed to the main body of the coffee grinder 10. The first end of the transmission rod 122 is fixedly connected to the power output end of the grinding driving motor 121. The second end of the transmission rod 122 is arranged in the avoiding hole 111. The first end of the connecting sleeve 140 is sleeved with the second end of the transmission rod 122, so that the grinding driving motor 121 can drive the transmission rod 122 to rotate relative to the grinder main body 200, so that the transmission rod 122 can drive the grinding member 130 to rotate relative to the grinder main body 200 through the connecting sleeve 140. The second end of the transmission rod 122 is arranged opposite to the first end of the grinding member 130 to form a first avoiding gap 150. The first avoiding gap 150 can provide an avoiding space for the inclination of the grinding member 130 to weaken the stress concentration of the connecting part between the grinding member 130 and the connecting sleeve 140.

[0034] As shown in the drawings, Figures 1 to 3 In one embodiment, the connecting sleeve 140 includes a sleeve body 141 and a connecting rod 142. The first end of the sleeve body 141 is sleeved with the second end of the transmission rod 122. The second end of the sleeve body 141 is sleeved with the first end of the grinding member 130. The first end of the grinding member 130 and the second end of the transmission rod 122 are both limited in the sleeve body 141. The connecting rod 142 is arranged in the sleeve body 141. Both ends of the connecting rod 142 are fixedly connected with the inner wall of the sleeve body 141. The second end of the transmission rod 122 is formed with a connecting hole 1221. The connecting rod 142 is arranged in the connecting hole 1221, so that the connecting sleeve 140 is fixed to the transmission rod 122. The transmission rod 122 can more stably drive the connecting sleeve 140 to rotate relative to the grinder main body 200, thereby improving the use stability of the coffee grinder 10.

[0035] As shown in the drawings, Figure 3 As shown in the drawings and the drawings, in one embodiment, the sleeve body 141 and the connecting rod 142 are integrally formed to improve the compactness of the connecting sleeve 140.

[0036] As shown in the drawings, Figures 1 to 2As shown, in one of the embodiments, the second end of the support assembly 110 is further formed with a first limiting hole 112, and the drive connection structure 100 further comprises a connecting bearing 170, which is arranged in the first limiting hole 112 and sleeved on the first end of the grinding piece 130, and the outer peripheral wall of the connecting bearing 170 is fixedly connected with the inner peripheral wall of the first limiting hole 112, and the inner peripheral wall of the connecting bearing 170 is in sliding limiting abutment with the outer peripheral wall of the first end of the grinding piece 130, so as to reduce the possibility of the slight tilting of the grinding piece 130 due to uneven force when grinding coffee beans, and reduce the friction between the grinding piece 130 and the support assembly 110.

[0037] As shown, Figures 1 to 2 In one of the embodiments, the connecting bearing 170 comprises a first connecting bearing 171 and a second connecting bearing 172, both of which are sleeved on the first end of the grinding piece 130, and the outer peripheral walls of the first connecting bearing 171 and the second connecting bearing 172 are fixedly connected with the inner peripheral wall of the first limiting hole 112, and the inner peripheral walls of the first connecting bearing 171 and the second connecting bearing 172 are in sliding limiting abutment with the outer peripheral wall of the first end of the grinding piece 130, and the first connecting bearing 171 and the second connecting bearing 172 are arranged along the length direction of the grinding piece 130, which not only further reduces the possibility of the slight tilting of the grinding piece 130 due to uneven force when grinding coffee beans, but also further reduces the friction between the grinding piece 130 and the support assembly 110.

[0038] As shown, Figures 1 to 2 In one of the embodiments, the connecting sleeve 140 is a stainless steel sleeve or an aluminum alloy sleeve, so that the grinding drive piece 120 can more stably drive the grinding piece 130 to rotate relative to the grinder main body 200 through the connecting sleeve 140.

[0039] As shown, Figures 1 to 2 In one of the embodiments, the first avoiding gap 150 is greater than or equal to 1.5 mm, and the second avoiding gap 160 is in the range of 0.15 mm-0.3 mm, so that when the grinding piece 130 tilts slightly, the first avoiding gap 150 and the second avoiding gap 160 can provide avoiding space for the grinding piece 130, effectively weaken the stress concentration of the connecting part between the grinding piece 130 and the connecting sleeve 140, greatly reduce the possibility of damage or even damage of the grinding piece 130 and the grinding drive piece 120, thereby prolonging the service life of the coffee grinder 10, and also greatly reducing the possibility of the grinding piece 130 being stuck, improving the grinding efficiency and use stability of the coffee grinder 10.

[0040] As shown, Figures 2 to 3As shown, in one of the embodiments, the connecting sleeve 140 is formed with a second limiting hole 143, the driving end of the grinding driving member 120 and the first end of the grinding member 130 are arranged in the second limiting hole 143, so that the grinding driving member 120 drives the grinding member 130 to rotate relative to the support assembly 110 through the connecting sleeve 140, so that when the driving end of the grinding driving member 120 drives the connecting sleeve 140 to rotate relative to the support assembly 110, the connecting sleeve 140 can drive the grinding member 130 to rotate relative to the grinder main body 200, so as to perform grinding operation on the coffee beans in the grinder main body 200.

[0041] The present disclosure also provides a coffee grinder 10, which comprises a grinder main body 200 and the driving connection structure 100 of any of the above embodiments, the support assembly 110 is fixedly installed in the main body of the coffee grinder 10, and the fixed end of the grinding driving member 120 is fixedly installed on the grinder main body 200.

[0042] As shown, Figures 1 to 2 In the present embodiment, the support assembly 110 comprises a transmission frame 113, an adjusting frame 114 and a fixing frame 115, the transmission frame 113 is installed in the grinder main body 200, the inner circumferential wall of the grinder main body 200 is formed with a first annular limiting groove 210, the transmission frame 113 is formed with a first annular limiting flange 1131 arranged correspondingly to the first annular limiting groove 210, the first annular limiting flange 1131 is limited in the first annular groove and in sliding abutment with the inner wall of the first annular limiting groove 210, the transmission frame 113 is formed with a threaded hole 1132, the outer wall of the adjusting frame 114 is formed with a threaded surface 1141, the adjusting frame 114 is arranged in the threaded hole 1132 and is threadedly connected with the transmission frame 113, an avoidance hole 111 is formed in the first end of the adjusting frame 114, the second end of the adjusting frame 114 is further formed with a third limiting hole 1142 in communication with the avoidance hole 111, the fixing frame 115 is fixedly installed in the grinder main body 200, the fixing frame 115 is located below the transmission frame 113, the first end of the fixing frame 115 is arranged in the limiting hole and in sliding limiting abutment with the hole wall of the limiting hole, a first limiting hole 112 is formed in the fixing frame 115, and the first connecting bearing 171 and the second connecting bearing 172 are fixedly connected with the fixing frame 115, so that when the transmission frame 113 rotates relative to the grinder main body 200, the adjusting frame 114 can ascend or descend relative to the grinder main body 200 along the length direction of the first end of the fixing frame 115.

[0043] As shown, Figures 1 to 2As shown, in this embodiment, the driving connection structure 100 further comprises an adjusting ring 180 and a transmission member 190, the peripheral wall of the grinder main body 200 is formed with a second annular limiting groove, the adjusting ring 180 is limited in the second annular limiting groove and in sliding abutment with the inner wall of the second annular limiting groove, the inner peripheral wall of the adjusting ring 180 is formed with a first tooth surface 181, the outer peripheral wall of the transmission member 190 is sleeved with a transmission gear 191, the adjusting ring 180 is in driving connection with the transmission gear 191 through the meshing of the first tooth surface 181 and the transmission gear 191, the transmission gear 191 is in rotational limiting connection with the transmission member 190, the outer peripheral wall of the transmission frame 113 is sleeved with a driven gear 1133, the transmission frame 113 is in driving connection with the transmission gear 191 through the meshing of the driven gear 1133 and the transmission gear 191, so that when the user rotates the adjusting ring 180 relative to the grinder main body 200, the adjusting ring 180 can drive the transmission gear 191 to rotate relative to the transmission member 190 through the first tooth surface 181, and the transmission gear 191 can drive the transmission frame 113 to rotate relative to the grinder main body 200 through the driven gear 1133, so that the adjusting frame 114 can ascend or descend relative to the grinder main body 200 along the length direction of the first end of the fixing frame 115.

[0044] As shown, Figures 1 to 2 in this embodiment, the second end of the fixing frame 115 is provided with a first grinding part 210, the second end of the grinding member 130 is provided with a second grinding part 131, the first grinding part 210 and the second grinding part 131 are oppositely arranged, and the first grinding part 210 and the second grinding part 131 jointly form a grinding area 300, so that when the grinding driving member 120 drives the grinding member 130 to rotate relative to the grinder main body 200 through the connecting sleeve 140, the second grinding part 131 can rotate relative to the first grinding part 210, so that the first grinding part 210 and the second grinding part 131 can cooperate with each other to grind the coffee beans located in the grinding area 300.

[0045] As shown, Figures 1 to 2 in this embodiment, the first end of the grinding member 130 is formed with a third annular limiting groove 132, the inner peripheral wall of the avoiding hole 111 is formed with a third annular limiting flange 1111 oppositely arranged with the third annular limiting groove 132, the third annular limiting flange 1111 is located in the third annular limiting groove 132, and the outer wall of the third annular limiting flange 1111 is in sliding abutment with the inner wall of the third annular limiting groove 132, so that the grinding member 130 can rotate relative to the grinder main body 200 to grind the coffee beans in the grinding area 300, and at the same time, the adjusting member can also drive the grinding member 130 to ascend or descend relative to the grinder main body 200 to adjust the gap between the first grinding part 210 and the second grinding part 131.

[0046] As shown, Figures 1 to 2As shown, in the embodiment, the first end of the grinder main body 200 is formed with a connecting through hole 220, the driving end of the grinding driving member 120 is arranged in the connecting through hole 220 and in the avoiding hole 111, so that the connecting sleeve 140 can be sleeved on the driving end of the grinding driving member 120.

[0047] Compared with the prior art, the present disclosure has at least the following advantages:

[0048] The coffee grinder 10 described above, since the connecting sleeve 140 is arranged in the avoiding hole 111, the first end of the connecting sleeve 140 is sleeved on the driving end of the grinding driving member 120, the second end of the connecting sleeve 140 is sleeved on the first end of the grinding member 130, and the first end of the grinding member 130 and the driving end of the grinding driving are both limited in the connecting sleeve 140, so that the grinding driving member 120 drives the grinding member 130 to rotate relative to the support assembly 110 through the connecting sleeve 140; there is a first avoiding gap 150 between the first end of the grinding member 130 and the driving end of the grinding driving member 120, and there is a second avoiding gap 160 between the outer peripheral wall of the first end of the grinding member 130 and the inner peripheral wall of the connecting sleeve 140, so that when the grinding member 130 tilts slightly due to uneven force, the first avoiding gap 150 and the second avoiding gap 160 can provide avoiding space for the tilt of the grinding member 130, so as to weaken the stress concentration of the connecting part between the grinding member 130 and the connecting sleeve 140, greatly reducing the possibility of damage or even damage of the grinding member 130 and the grinding driving member 120, thereby prolonging the service life of the coffee grinder 10, and also greatly reducing the possibility of the grinding member 130 being stuck, improving the grinding efficiency and use stability of the coffee grinder 10.

[0049] The above-described embodiments only express several embodiments of the present disclosure, which are described in a more specific and detailed manner, but should not 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 should be subject to the appended claims.

Claims

1. A driving connection structure for being installed in a grinder body of a coffee grinder, comprising a support assembly, a grinding driving member and a grinding member; characterized in that the support assembly is used for being fixedly installed in the coffee grinder body, a first end of the support assembly is formed with a clearance hole; a fixed end of the grinding driving member is used for being fixedly installed on the grinder body, a driving end of the grinding driving member is arranged in the clearance hole; the grinding member is arranged in the coffee grinder body, a first end of the grinding member is arranged in the clearance hole and is oppositely arranged with the driving end of the grinding driving member, the first end of the grinding member is rotationally connected with the support assembly, a second end of the grinding member is used for being arranged at a second end of the coffee grinder body, and the grinding member is used for grinding coffee beans in the grinder body; the driving connection structure further comprises a connecting sleeve, the connecting sleeve is arranged in the clearance hole, a first end of the connecting sleeve is sleeved on the driving end of the grinding driving member, and a second end of the connecting sleeve is sleeved on the first end of the grinding member, and the first end of the grinding member and the driving end of the grinding driving member are both limited in the connecting sleeve, so that the grinding driving member drives the grinding member to rotate relative to the support assembly through the connecting sleeve; a first clearance gap exists between the end of the first end of the grinding member and the driving end of the grinding driving member, and a second clearance gap exists between the outer peripheral wall of the first end of the grinding member and the inner peripheral wall of the connecting sleeve.

2. The driving connection structure according to claim 1, characterized in that, the grinding driving member comprises a grinding driving motor and a transmission rod, the fixed end of the grinding driving member is arranged at the grinding driving motor, the driving end of the grinding driving member is arranged at the transmission rod, the grinding driving motor is used for being fixedly installed on the coffee grinder body, a first end of the transmission rod is fixedly connected with a power output end of the grinding driving motor, a second end of the transmission rod is arranged in the clearance hole, the first end of the connecting sleeve is sleeved on the second end of the transmission rod, and the second end of the transmission rod is limited in the connecting sleeve, and the second end of the transmission rod is oppositely spaced apart from the first end of the grinding member to form the first clearance gap.

3. The drive connection structure according to claim 2, characterized in that the connecting sleeve comprises a sleeve body and a connecting rod, the first end of the sleeve body is sleeved on the second end of the transmission rod, the second end of the sleeve body is sleeved on the first end of the grinding member, and the first end of the grinding member and the second end of the transmission rod are both limited in the sleeve body; the connecting rod is arranged in the sleeve body, and both ends of the connecting rod are fixedly connected with the inner peripheral wall of the sleeve body; the second end of the transmission rod is formed with a connecting hole, and the connecting rod is arranged in the connecting hole, so that the connecting sleeve is fixed on the transmission rod.

4. The drive connection structure according to claim 3, characterized in that the sleeve body and the connecting rod are an integral structure.

5. The driving connection structure according to claim 1, wherein The second end of the support assembly is further formed with a first limiting hole, the driving connection structure further comprises a connecting bearing, the connecting bearing is arranged in the first limiting hole, the connecting bearing is sleeved on the first end of the grinding piece, the outer peripheral wall of the connecting bearing is fixedly connected with the inner peripheral wall of the first limiting hole, and the inner peripheral wall of the connecting bearing is in sliding limiting abutment with the outer peripheral wall of the first end of the grinding piece.

6. The drive connection structure according to claim 5, characterized in that The connecting bearing comprises a first connecting bearing and a second connecting bearing, the first connecting bearing and the second connecting bearing are both sleeved on the first end of the grinding piece, the outer peripheral walls of the first connecting bearing and the second connecting bearing are both fixedly connected with the inner peripheral wall of the first limiting hole, the inner peripheral walls of the first connecting bearing and the second connecting bearing are both in sliding limiting abutment with the outer peripheral wall of the first end of the grinding piece, and the first connecting bearing and the second connecting bearing are arranged at intervals along the length direction of the grinding piece.

7. The driving connection structure according to claim 1, wherein The connecting sleeve is a stainless steel sleeve or an aluminum alloy sleeve.

8. The driving connection structure according to claim 1, wherein The first avoiding gap is greater than or equal to 1.5 mm, and the second avoiding gap is 0.15 mm to 0.3 mm.

9. The driving connection structure according to claim 1, wherein The connecting sleeve is formed with a second limiting hole, the driving end of the grinding driving piece and the first end of the grinding piece are arranged in the second limiting hole, so that the grinding driving piece drives the grinding piece to rotate relative to the support assembly through the connecting sleeve.

10. A coffee grinder characterized by The coffee grinder comprises a grinder body and the driving connection structure according to any one of claims 1 to 9, the support assembly is fixedly installed in the coffee grinder body, and the fixed end of the grinding driving piece is fixedly installed on the grinder body.

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