A lifting device

Abstract

The utility model provides a kind of lifting device, comprising: fixed support, mounting seat, lifting assembly, rotating shaft, cam, driving part and elastic driving part, the mounting seat has installation groove, the lifting assembly includes abutting portion and the support portion being located at the abutting portion upper end, the support portion supports the mounting seat upwards, the rotation can be rotated relative to the fixed support, the cam includes rotating portion and the protruding portion of the protruding of being away from the rotating portion, the rotating portion is sleeved in the rotating shaft, the side wall of the protruding portion is formed with abutting face, the abutting portion is downwardly active and abuts on the abutting face, the elastic driving part is abutted between the fixed support and the lifting assembly, the structure of the lifting assembly and the cam of the utility model is simple, easy to produce and manufacture, and the manufacturing cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of beverage preparation equipment, and in particular to a lifting device. Background Technology

[0002] Existing coffee machines or grinding devices can dispense coffee powder, including a powder dispensing mechanism. The powder dispensing mechanism includes a portafilter lifting device, which includes a lifting mechanism and a portafilter fixing fixture. The portafilter fixing fixture is used to hold the portafilter and is located on the lifting mechanism. During the powder dispensing process, the lifting mechanism drives the portafilter fixing fixture upward to a predetermined position to dispense coffee powder into the portafilter. After the powder dispensing is completed, the lifting mechanism drives the portafilter fixing fixture downward to the initial position. Chinese Patent 202221436444.6 discloses an automatic coffee maker with a liftable coffee bowl support platform, including a machine body, a coffee bowl support, and a lifting assembly. The coffee bowl support moves up and down via the lifting assembly, which includes a slide, a lead screw, and a slide base. The lead screw is located inside the machine body and is fixed relative to the slide base. A lead screw nut is provided on the coffee bowl support, and the lead screw nut is threadedly connected to the lead screw. The coffee bowl support is locked onto the slide via the lead screw nut. By advancing the lead screw nut and the lead screw thread, the slide and the coffee bowl support mounted on the slide can slide along the slide base to adjust the position of the coffee bowl support relative to the slide for coffee powder distribution. However, such a lifting mechanism is relatively complex and has a high manufacturing cost. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a lifting device, comprising: a fixed bracket, a mounting base, a lifting assembly, a rotating shaft, a cam, a driving component, and an elastic driving component. The mounting base is movable relative to the fixed bracket, and the driving component is fixed relative to the fixed bracket. The mounting base has a mounting groove. The lifting assembly includes an abutment portion and a support portion located at the upper end of the abutment portion, with the support portion supporting the mounting base upwards. The rotating shaft is horizontally positioned below the abutment portion and is rotatable relative to the fixed bracket. The cam includes a rotating portion and a protrusion extending away from the rotating portion. The rotating portion is sleeved on the rotating shaft, and the sidewall of the protrusion forms an abutment surface. The abutment portion moves downwards and abuts against the abutment surface. The output shaft of the driving component is fixedly connected to the rotating shaft. When the driving component drives the cam to rotate, the cam drives the lifting assembly to move up and down relative to the fixed bracket, which in turn drives the mounting base to move up and down. The elastic driving component abuts between the fixed bracket and the lifting assembly.

[0004] As an improvement to the lifting device of this utility model, the abutting part includes a sliding rod, a pin, and a sliding wheel. The supporting part is located at the upper end of the sliding rod, the pin is located at the lower end of the sliding rod, the sliding wheel is sleeved on the pin and can rotate relative to the pin, and the sliding wheel moves downward to abut against the abutting surface.

[0005] As an improvement to the lifting device of this utility model, the side wall of the protrusion has a terminal portion and a buffer surface. The terminal portion is located at the end of the abutment surface away from the rotating part. The terminal portion is farther away from the rotating part than the abutment surface. The abutment portion can slide from the abutment surface to the terminal portion. The buffer surface extends from the terminal portion toward the side away from the abutment surface. The buffer surface and the terminal portion are arc surfaces with the same radius and the same center.

[0006] As an improvement to the lifting device of this utility model, the contact surface is an arc surface with a radius smaller than that of the terminal part and not concentric with the terminal part.

[0007] As an improvement to the lifting device of this utility model, the fixed bracket has a receiving groove that extends downward through the fixed bracket. The sliding rod includes a first part and a second part connected to the lower end of the first part. The upper end of the first part is connected to the support part. The second part is disposed in the receiving groove and protrudes radially from the first part. The first part passes through the top wall of the receiving groove and is connected to the second part. The elastic driving member is sleeved on the first part and abuts against the top wall of the receiving groove and the second part.

[0008] As an improvement to the lifting device of this utility model, the fixed bracket is provided with a through groove in the horizontal direction, the through groove is located below the receiving groove, the driving member is fixed to the fixed bracket and located on one side of the through groove, and the rotating shaft is sleeved in the through groove and can rotate relative to the through groove.

[0009] As an improvement to the lifting device of this utility model, the support part has a supporting surface, which supports the bottom wall of the mounting groove upward.

[0010] As an improvement to the lifting device of this utility model, the fixed bracket is provided with a guide member, the guide member is parallel to the sliding rod, and the mounting base is provided with a guide part that cooperates with the guide member.

[0011] As an improvement to the lifting device of this utility model, the guide member is a guide post, and the guide post is provided with at least two and symmetrically distributed on opposite sides of the mounting groove, and the guide part is at least two guide holes corresponding one-to-one with the guide post.

[0012] As an improvement to the lifting device of this utility model, the rotating part includes a sleeve groove, the end of the rotating shaft away from the driving member is sleeved in the sleeve groove, the bottom wall of the sleeve groove protrudes axially toward the rotating shaft with a limiting protrusion, the rotating shaft is provided with a limiting groove, the limiting groove passes through the end of the rotating shaft away from the driving member along the axial direction of the rotating shaft, and the limiting protrusion is inserted into the limiting groove.

[0013] As an improvement to the lifting device of this utility model, the fixed bracket has a first limiting part protruding in the direction of the cam. The first limiting part is located on the rotation path of the cam. The side wall of the cam is provided with a first stop and a second stop corresponding to the first limiting part. When the cam drives the lifting assembly to move upward to a preset position, the first stop abuts against the first limiting part along the rotation direction of the cam.

[0014] As an improvement to the lifting device of this utility model, the fixed bracket has a second limiting part protruding in the direction of the cam. The second limiting part is located on the rotation path of the cam. The side wall of the cam is provided with a second stop corresponding to the second limiting part. When the cam drives the lifting assembly to move downward to the initial position, the second stop abuts against the second limiting part along the rotation direction of the cam.

[0015] The beneficial effects of this utility model are as follows: by setting the abutting part of the lifting component to move in contact with the abutting surface of the cam, when the driving component drives the cam to rotate, the cam drives the lifting component to move up and down relative to the fixed bracket, and then the lifting component drives the mounting base to move up and down. The lifting component and the cam have simple structures, are easy to manufacture, and have low manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lifting component in a preferred embodiment of the lifting device of this utility model, located at a preset position. Figure 2 for Figure 1 A schematic diagram of the decomposed structure; Figure 3 for Figure 1 A schematic diagram of the structure cut along the axis of rotation; Figure 4 for Figure 1 A schematic diagram of the structure cut radially along the axis of rotation; Figure 5 for Figure 4 An enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the lifting assembly of a preferred embodiment of the lifting device of this utility model; Figure 7 for Figure 6 A schematic diagram of the decomposition process; Figure 8 This is a schematic diagram of the structure of the cam in a preferred embodiment of the lifting device of this utility model; Figure 9 This is a schematic diagram of the preferred embodiment of the lifting device of this utility model, showing the powder bowl placed in the mounting groove. Figure 10 This is a schematic diagram of the lifting component of the lifting device of this utility model in its initial position. Detailed Implementation

[0017] Below, in conjunction with Figures 1 to 10 The present invention will be further described in the figures and in preferred embodiments and other embodiments. It should be noted that, without conflict, the various technical features described below can be arbitrarily combined to form new embodiments.

[0018] refer to Figure 1 , Figure 2 and Figure 4In a preferred embodiment, the present invention provides a lifting device 10, applied to a coffee grinder or coffee machine capable of dispensing coffee powder, comprising: a fixed bracket 1, a mounting base 7, a lifting assembly 2, a rotating shaft 3, a cam 4, a driving component 8, and an elastic driving component 5. The fixed bracket 1 is fixed to the coffee grinder or coffee machine capable of dispensing coffee powder. The mounting base 7 is movable relative to the fixed bracket 1. The driving component 8 is fixed relative to the fixed bracket 1. The mounting base 7 has a mounting groove 71 for placing a coffee bowl 20, which typically has a handle for collecting coffee powder from the grinder. The lifting assembly 2 includes an abutment portion 21 and a support portion 22 located at the upper end of the abutment portion 21. The support portion 22 supports the mounting base 7 upwards. The rotating shaft 3 is arranged horizontally and located below the abutment portion 21. The rotating shaft 3 is rotatable relative to the fixed bracket 1. The cam 4 includes a rotating portion 41 and a cam that moves away from the fixed bracket 1. The rotating part 41 has a protruding portion 42, which is sleeved on the rotating shaft 3. The side wall of the protruding portion 42 forms an abutment surface 421, and the abutment portion 21 moves downward to abut against the abutment surface 421. The output shaft of the driving member 8 is fixedly connected to the rotating shaft 3. When the driving member 8 drives the cam 4 to rotate, the cam 4 drives the lifting assembly 2 to move up and down relative to the fixed bracket 1, and then the lifting assembly 2 drives the mounting seat 7 to move up and down. The elastic driving member 5 abuts between the fixed bracket 1 and the lifting assembly 2. In this embodiment, the driving member 8 is a motor, and the elastic driving member 5 is a spring. During the powder application process, the driving member 8 drives the cam 4 to rotate through the rotating shaft 3, and then the cam 4 provides an upward driving force to drive the lifting assembly 2 to overcome the elastic force of the elastic driving member 5 and move upward, thereby driving the mounting seat 7 to move upward to a preset position for powder application. Figure 10 As shown, when the powder application is complete, the drive member 8 drives the cam 4 to rotate in the opposite direction via the rotating shaft 3. The driving force provided by the cam 4 disappears, and the elastic drive member 5 provides a downward driving force to drive the lifting assembly 2 to move downward, so that the lifting assembly 2 moves downward to the initial position. By setting the cam 4 to drive the lifting assembly 2 to move up and down relative to the fixed bracket 1, the structure of the lifting device 10 of this utility model is simplified, and the manufacturing cost of the lifting device 10 of this utility model is reduced.

[0019] like Figure 3 , Figure 4 and Figure 5As shown, in a preferred embodiment, the abutting part 21 includes a sliding rod 211, a pin 212, and a sliding wheel 213. The support part 22 is located at the upper end of the sliding rod 211, the pin 212 is located at the lower end of the sliding rod 211, and the sliding wheel 213 is sleeved on the pin 212 and can rotate relative to the pin 212. The sliding wheel 213 moves downward and abuts against the abutting surface 421. By moving the sliding wheel 213 against the abutting surface 421, the friction between the sliding wheel 213 and the abutting surface 421 is reduced when the sliding wheel 213 slides relative to the abutting surface 421. In this embodiment, the sliding wheel 213 is a roller; in other embodiments, the sliding wheel 213 can be a bearing.

[0020] like Figure 3 , Figure 4 and Figure 5 As shown, in a preferred embodiment, the sidewall of the protrusion 42 has a terminal portion 422 and a buffer surface 423. The terminal portion 422 is located at the end of the abutment surface 421 away from the rotating portion 41. The terminal portion 422 is farther from the rotating portion 41 than the abutment surface 421. The abutment portion 21 can slide from the abutment surface 421 to the terminal portion 422. That is, when the abutment portion 21 is located at the terminal portion 422, the height of the mounting base 7 is higher than when the abutment portion 21 is located at the abutment surface 421. The buffer surface 423 extends from the terminal portion 422 toward the end of the abutment surface 421 away from the rotating portion 41. The buffer surface 423 and the terminal portion 422 are arc surfaces with the same radius and the same center. When the cam 4 rotates to the point where the abutting portion 21 abuts against the terminal portion 422, that is, when the lifting assembly 2 rises to a preset position for powder application, there is a possibility that the terminal portion 422 may slip against the abutting surface 421. By setting the buffer surface 423 to be located on the side of the terminal portion 422 away from the abutting surface 421, the abutting portion 21 can be buffered against the buffer surface 423, preventing the abutting portion 21 from being suspended and causing the lifting assembly 2 to suddenly descend. In this embodiment, the abutting surface 421 is an arc surface with a radius smaller than that of the terminal portion 422 and not concentric with it. In this embodiment, the abutting surface 421 is composed of two arc surfaces with different radii, and the two arc surfaces of the abutting surface 421 transition tangentially, wherein the arc surface with the larger radius of the abutting surface 421 transitions tangentially with the terminal portion 422.

[0021] like Figure 3 , Figure 6 and Figure 7As shown, in a preferred embodiment, the fixed bracket 1 has a receiving groove 11 that extends downward through the fixed bracket 1. The sliding rod 211 includes a first part 2111 and a second part 2112 connected to the lower end of the first part 2111. The upper end of the first part 2111 is connected to the support part 22. The second part 2112 is disposed in the receiving groove 11 and protrudes radially from the first part 2111. The first part 2111 passes through the top wall of the receiving groove 11 and is connected to the second part 2112. The elastic drive member 5 is sleeved on the first part 2111 and abuts against the top wall of the receiving groove 11 and the second part 2112.

[0022] like Figure 3 , Figure 6 and Figure 7 As shown, in a preferred embodiment, the fixed bracket 1 has a through groove 12 in the horizontal direction. The through groove 12 is located below the receiving groove 11. The driving member 8 is fixed to the fixed bracket 1 and located on one side of the through groove 12. The rotating shaft 3 is sleeved in the through groove 12 and can rotate relative to the through groove 12.

[0023] like Figure 3 and Figure 6 As shown, in a preferred embodiment, the support 22 has a supporting surface 221 that supports the bottom wall of the mounting groove 71 upwards.

[0024] like Figure 2 and Figure 4 As shown, in a preferred embodiment, the fixed bracket 1 is provided with a guide member 6, which is parallel to the sliding rod 211, and the mounting base 7 is provided with a guide portion 72 that cooperates with the guide member 6. In this embodiment, the guide member 6 is a guide post 6, and the guide post 6 has at least two symmetrically distributed on opposite sides of the mounting groove 71. The guide portion 72 is at least two guide holes 72 that correspond one-to-one with the guide post 6. In a specific embodiment, two guide posts are provided on each of the opposite sides of the mounting groove 71.

[0025] like Figure 2 and Figure 8 As shown, in a preferred embodiment, the rotating part 41 includes a sleeve groove 411, and the end of the rotating shaft 3 away from the driving member 8 is sleeved in the sleeve groove 411. The bottom wall of the sleeve groove 411 extends axially toward the rotating shaft 3 with a limiting protrusion 4111. The rotating shaft 3 is provided with a limiting groove 31, which passes through the end of the rotating shaft 3 away from the driving member 8 along the axial direction of the rotating shaft 3. The limiting protrusion 4111 is inserted into the limiting groove 31.

[0026] like Figure 4 As shown, in a preferred embodiment, the fixed bracket 1 has a first limiting part 13 protruding towards the direction of the cam 4. The first limiting part 13 is located on the rotation path of the cam 4. The side wall of the cam 4 is provided with a first stop 43 corresponding to the first limiting part 13. When the cam 4 drives the lifting assembly 2 to move upward to a preset position, the first stop 43 abuts against the first limiting part 13 along the rotation direction of the cam 4. When the control program of the driving component 8 does not control the driving component 8 accurately enough, the first stop 43 abuts against the first limiting part 13 along the rotation direction of the cam 4 to limit the cam 4 from continuing to rotate, preventing the cam 4 from rotating excessively, and the abutting part 21 disengages from the terminal part 422. Figure 10 As shown, in a preferred embodiment, the fixed bracket 1 has a second limiting part 14 protruding in the direction of the cam 4. The second limiting part 14 is located on the rotation path of the cam 4. The side wall of the cam 4 is provided with a second stop part 44 corresponding to the second limiting part 14. When the cam 4 drives the lifting assembly 2 to move downward to the initial position, the second stop part 44 abuts against the second limiting part 14 along the rotation direction of the cam 4. When the control program of the drive component 8 does not control the drive component 8 accurately enough, the second stop part 44 abuts against the second limiting part 14 along the rotation direction of the cam 4 to limit the cam 4 from continuing to rotate and prevent the cam 4 from rotating excessively. The abutting part 21 disengages from the abutting surface 421.

[0027] The advantages of the lifting device of this utility model are as follows: by setting the abutting part of the lifting component to move in contact with the abutting surface of the cam, when the driving component drives the cam to rotate, the cam drives the lifting component to move up and down relative to the fixed bracket, and then the lifting component drives the mounting base to move up and down. The lifting component and the cam have simple structures, are easy to manufacture, and have low manufacturing costs.

[0028] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A lifting device, characterized in that include: The system comprises a fixed bracket, a mounting base, a lifting assembly, a rotating shaft, a cam, a drive component, and a resilient drive component. The mounting base is movable relative to the fixed bracket, and the drive component is fixed relative to the fixed bracket. The mounting base has a mounting groove. The lifting assembly includes an abutment portion and a support portion located above the abutment portion, with the support portion supporting the mounting base upwards. The rotating shaft is horizontally positioned below the abutment portion and is rotatable relative to the fixed bracket. The cam includes a rotating portion and a protrusion extending away from the rotating portion. The rotating portion is sleeved on the rotating shaft, and the sidewall of the protrusion forms an abutment surface. The abutment portion moves downwards and abuts against the abutment surface. The output shaft of the drive component is fixedly connected to the rotating shaft. When the drive component drives the cam to rotate, the cam drives the lifting assembly to move up and down relative to the fixed bracket, which in turn drives the mounting base to move up and down. The resilient drive component abuts between the fixed bracket and the lifting assembly.

2. The lift device of claim 1, wherein, The abutting part includes a sliding rod, a pin, and a sliding wheel. The supporting part is located at the upper end of the sliding rod, the pin is located at the lower end of the sliding rod, the sliding wheel is sleeved on the pin and can rotate relative to the pin, and the sliding wheel moves downward to abut against the abutting surface.

3. Lift according to claim 1 or 2, characterized in that The sidewall of the protrusion has a terminal portion and a buffer surface. The terminal portion is located at the end of the abutment surface away from the rotating portion. The terminal portion is farther from the rotating portion than the abutment surface. The abutment portion can slide from the abutment surface to the terminal portion. The buffer surface extends from the terminal portion toward the side away from the abutment surface. The buffer surface and the terminal portion are arc surfaces with the same radius and the same center.

4. The lift device of claim 3, wherein, The contact surface is an arc surface with a radius smaller than that of the terminal portion and not concentric with the terminal portion.

5. The lift device of claim 2, wherein, The fixed bracket has a receiving groove that extends downward through the fixed bracket. The sliding rod includes a first part and a second part connected to the lower end of the first part. The upper end of the first part is connected to the support part. The second part is disposed in the receiving groove and protrudes radially from the first part. The first part passes through the top wall of the receiving groove and is connected to the second part. The elastic drive member is sleeved on the first part and abuts against the top wall of the receiving groove and the second part.

6. The lift device of claim 5, wherein, The fixed bracket has a through groove in the horizontal direction, the through groove is located below the receiving groove, the driving member is fixed to the fixed bracket and located on one side of the through groove, and the rotating shaft is sleeved in the through groove and can rotate relative to the through groove.

7. The lift device of claim 1, wherein, The support has a supporting surface that supports the bottom wall of the mounting groove.

8. The lift device of claim 2, wherein, The fixed bracket is provided with a guide member, which is parallel to the sliding rod, and the mounting base is provided with a guide part that cooperates with the guide member.

9. The lift device of claim 8, wherein, The guide component is a guide post, and the guide post has at least two and is symmetrically distributed on opposite sides of the mounting groove. The guide part is at least two guide holes that correspond one-to-one with the guide post.

10. The lift device of claim 1, wherein, The rotating part includes a sleeve groove, and the end of the rotating shaft away from the driving member is sleeved in the sleeve groove. The bottom wall of the sleeve groove protrudes axially toward the rotating shaft with a limiting protrusion. The rotating shaft is provided with a limiting groove, which passes through the end of the rotating shaft away from the driving member along the axial direction of the rotating shaft. The limiting protrusion is inserted into the limiting groove.

11. The lift device of claim 1, wherein, The fixed bracket has a first limiting part protruding in the direction of the cam. The first limiting part is located on the rotation path of the cam. The side wall of the cam is provided with a first stop and a second stop corresponding to the first limiting part. When the cam drives the lifting assembly to move upward to a preset position, the first stop abuts against the first limiting part along the rotation direction of the cam.

12. The lift device of claim 11, wherein, The fixed bracket has a second limiting part protruding in the direction of the cam. The second limiting part is located on the rotation path of the cam. The side wall of the cam is provided with a second stop corresponding to the second limiting part. When the cam drives the lifting assembly to move downward to the initial position, the second stop abuts against the second limiting part along the rotation direction of the cam.

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