Grinding device capable of reliably adjusting grinding gap

Abstract

The utility model relates to the technical field of household appliances, in particular to a grinding device capable of reliably adjusting a grinding gap, which comprises an adjusting mechanism for driving a movable grinding head to move relative to a static grinding cylinder so as to adjust the grinding gap between the static grinding cylinder and the movable grinding head, and an adjusting rod for locking and unlocking relative to the adjusting mechanism, when the adjusting rod is locked relative to the adjusting mechanism, the adjusting mechanism can be pushed to move, and when the adjusting rod is unlocked relative to the adjusting mechanism, the adjusting mechanism is not pushed to move. On the basis, the grinding device can realize the adjustability and solidification of the initial grinding gap, and effectively solves the problems that the initial grinding gap between the dynamic grinding and the static grinding in the prior art is complicated to adjust and is based on manufacturing tolerance, the adjustment cannot be reliable, the adjustment can only be performed before leaving a factory, but the adjustment cannot be performed quickly and simply after leaving the factory; and the adjustment is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a grinding device with reliable adjustment of the grinding gap. Background Technology

[0002] There are many existing grinding devices for home use, such as grinders, powder grinders, and coffee grinders. Most of them use a moving grinding head relative to a stationary grinding head, utilizing the grinding teeth between the moving and stationary grinding heads to pulverize materials through friction, compression, and shearing. Compared to traditional blade-type grinding, this grinding method can reduce the motor speed to a certain extent, resulting in lower noise during the grinding process and less disturbance to neighbors. However, when consumers use grinding devices at home to grind dry materials, they are not limited to grinding a single fixed material. For example, they may grind coffee beans, soybeans, mung beans, or Chinese medicinal herbs. Different substances require different levels of powder coarseness. For instance, some medicinal herbs should not be ground into powder; grinding them into granules is more conducive to the extraction of their medicinal properties during cooking.

[0003] Based on this, existing grinders, such as the patent with application number 202420193261.9, disclose a coffee machine with an adjustable grind size structure. By adjusting the threaded assembly, the axial position of the moving grinding wheel on the motor shaft can be changed, thereby altering the gap between the moving and stationary grinding wheels to grind coffee powder of different coarseness. However, with this grinder, the user must disassemble the main unit before each grind size adjustment. This is especially problematic when grinding different materials continuously, forcing an interruption of the grinding process, making operation cumbersome, imposing a burden of repeated disassembly on the user, and even posing a safety risk of misoperation in severe cases.

[0004] To facilitate user operation, existing patent 202123368121.6 discloses a tilting coffee grinder with adjustable grind size. This patent discloses an adjustment knob located on the outside of the machine. Since the adjustment knob is threadedly connected to the grinding mechanism, rotating the knob moves axially along the central axis, thereby moving the inner grinding wheel and changing the distance between the inner and outer grinding wheels to achieve adjustable grind size. This solution eliminates the need for users to disassemble the main unit before each adjustment, making it more convenient. However, for this type of coffee grinder, assembly workers need to use specialized tools to adjust the initial grinding gap between the inner and outer grinding wheels before the machine leaves the factory. Users then need to make secondary adjustments based on this initial gap before using the machine. On the one hand, since the initial grinding gap is adjusted before the machine leaves the factory, users cannot adjust it again. If the initial grinding gap is not properly adjusted or wears down after long-term use, it will increase, resulting in an undesirable fine powder. On the other hand, before the machine leaves the factory, due to manufacturing and assembly tolerances between various parts during the assembly process, even if workers use special tooling, the initially adjusted grinding gap may still not meet the requirements, making it difficult to guarantee the consistency of the ground powder. Furthermore, although different grinding devices have the same grinding structure, their initial grinding gaps may be set differently for different purposes. Therefore, various special toolings are needed to adjust the different initial grinding gaps before leaving the factory, which inevitably makes the assembly and adjustment of the machine very complex and cumbersome. Utility Model Content

[0005] The purpose of this invention is to provide a grinding device with reliable grinding gap adjustment. This grinding device can effectively solve the problems of complex initial grinding gap adjustment between dynamic and static grinding, and the inability to reliably adjust the gap due to manufacturing tolerance issues. Moreover, the gap can only be adjusted before leaving the factory, but cannot be adjusted quickly, simply, and conveniently after leaving the factory.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a grinding device with reliably adjustable grinding gap, characterized in that it includes:

[0007] Host;

[0008] The static grinding cylinder is located inside the main unit;

[0009] The moving grinding head is located inside the stationary grinding cylinder and works with the stationary grinding cylinder to grind the material;

[0010] The adjustment mechanism, connected to the moving grinding head, is used to drive the moving grinding head to move relative to the stationary grinding cylinder, so as to adjust the grinding gap between the stationary grinding cylinder and the moving grinding head.

[0011] The adjusting rod, exposed on the main unit, can be locked and unlocked relative to the adjusting mechanism. When the adjusting rod is locked to the adjusting mechanism, it can push the adjusting mechanism to drive the moving grinding head. When the adjusting rod is unlocked relative to the adjusting mechanism, it cannot push the adjusting mechanism to drive the moving grinding head.

[0012] The slide rail allows the adjusting rod to push the adjusting mechanism along the extension direction of the slide rail, and the main unit is provided with a limiting part that can prevent the adjusting rod from moving continuously.

[0013] The adjusting rod has a first locking position and a second locking position that are locked to the adjusting mechanism;

[0014] The first locking position is used for the adjusting rod to push the adjusting mechanism to move, so that the moving grinding head and the stationary grinding cylinder are in the initial grinding gap. The second locking position is when the moving grinding head and the stationary grinding cylinder are in the initial grinding gap, the adjusting rod is unlocked relative to the adjusting mechanism in the first locking position, and the adjusting rod is moved from the first locking position to the position where it abuts against the limiting part and is locked onto the adjusting mechanism again.

[0015] Furthermore, the adjustment mechanism is provided with a strip-shaped mounting opening that is aligned with the extension direction of the slide rail. The adjustment rod can be locked to the adjustment mechanism at any position of the strip-shaped mounting opening, and when the adjustment rod is unlocked relative to the adjustment mechanism, the adjustment rod can slide along the extension direction of the slide rail on the strip-shaped mounting opening.

[0016] Furthermore, the adjustment mechanism is provided with a sliding groove for accommodating the connecting block. The sliding groove is connected to the strip-shaped mounting port. The adjustment rod passes through the strip-shaped mounting port and extends into the sliding groove to connect with the connecting block. When the adjustment rod is unlocked relative to the adjustment mechanism, the adjustment rod can drive the connecting block to slide in the sliding groove on the strip-shaped mounting port.

[0017] Alternatively, the adjustment mechanism may have multiple mounting holes arranged along the extension direction of the slide rail, and the mounting holes may communicate with the strip-shaped mounting opening. The adjustment rod can pass through the strip-shaped mounting opening and be fixed and released with any one of the mounting holes, so as to realize the locking and unlocking of the adjustment rod relative to the adjustment mechanism. When the adjustment rod is unlocked relative to the adjustment mechanism, the adjustment rod is released from the mounting hole, and the adjustment rod can slide on the strip-shaped mounting opening along the extension direction of the slide rail.

[0018] Furthermore, the slide rail is a strip-shaped opening on the main unit, and the adjustment mechanism has multiple mounting holes arranged along the extension direction of the strip-shaped opening. The adjustment rod passes through the strip-shaped opening and can be fixed and released with any one of the mounting holes to realize the locking and unlocking of the adjustment rod relative to the adjustment mechanism.

[0019] Furthermore, the adjustment mechanism includes:

[0020] The lifting seat is installed in the mounting cavity of the main unit in a height-adjustable manner. The moving grinding head is supported by the lifting seat and is driven by the lifting seat to move up and down relative to the stationary grinding cylinder.

[0021] An adjusting ring is rotatably mounted inside the mounting cavity of the main unit. The adjusting ring is fitted onto the outside of the lifting seat and is in transmission cooperation with the lifting seat. The rotation of the adjusting ring drives the lifting seat to move the grinding head up and down.

[0022] An anti-rotation part is provided in the mounting cavity of the main unit to prevent and limit the rotation of the lifting seat;

[0023] A limiting groove is provided on the inner peripheral wall of the main unit mounting cavity, and the adjusting ring is rotatably installed in the limiting groove and is axially limited by the limiting groove;

[0024] The outer peripheral wall of the main unit is provided with a strip-shaped opening that communicates with the limiting groove. The slide rail is formed by the strip-shaped opening. The adjusting rod passes through the strip-shaped opening and locks and unlocks relative to the adjusting ring.

[0025] Furthermore, the adjusting ring has multiple mounting holes arranged along the extension direction of the strip opening. The adjusting rod passes through the strip opening and can be fixed and released with any one of the mounting holes, so as to realize the locking and unlocking of the adjusting rod relative to the adjusting ring.

[0026] Alternatively, the adjusting ring may have a groove for accommodating the connecting block, and the outer peripheral wall of the adjusting ring may have a strip-shaped mounting port that corresponds to the strip-shaped opening and extends in the same direction. The groove and the mounting port are connected. The adjusting rod passes through the strip-shaped opening and the mounting port and extends into the groove to connect with the connecting block. When the adjusting rod is unlocked relative to the adjusting ring, the adjusting rod can drive the connecting block to slide in the groove on the mounting port.

[0027] Furthermore, the mounting cavity of the host is provided with a mounting cylinder, the lifting seat and the adjusting ring are located inside and outside the mounting cylinder respectively, the outer wall of the lifting seat is provided with a plurality of protrusions spaced apart along the circumference, the side wall of the mounting cylinder is provided with a plurality of clearance notches corresponding to the protrusions, the protrusions are fitted into the clearance notches one by one and extend out of the clearance notches to engage with the adjusting ring in a transmission manner, the clearance notches form the anti-rotation part, the outer surface of the protrusions is provided with external threads, and the inner side wall of the adjusting ring is provided with internal threads that engage with the external threads;

[0028] Alternatively, the host includes a lower housing and an upper housing connected to the lower housing, and the limiting groove is formed by the upper housing and the lower housing.

[0029] Alternatively, the host unit includes a lower housing and an upper housing connected to the lower housing, wherein the strip opening is a strip notch provided at the bottom of the upper housing and / or the top of the lower housing.

[0030] Furthermore, the main unit includes a separate base and a discharge housing. The discharge housing includes a grinding cylinder with a grinding chamber and a discharge nozzle disposed on one side of the grinding cylinder and communicating with the grinding chamber. The stationary grinding cylinder and the moving grinding head are located inside the grinding chamber. The base is provided with a bayonet. When the discharge housing is installed on the base, the discharge nozzle is engaged in the bayonet.

[0031] Furthermore, the main unit includes a discharge housing and an infeed housing located above the discharge housing. The discharge housing includes a grinding cylinder with a moving grinding head and a discharge nozzle, and the infeed housing includes a fixed cylinder with a stationary grinding cylinder and a feed chamber. When the infeed housing and the discharge housing are installed together, the fixed cylinder and the grinding cylinder enclose a grinding cavity, and the feed chamber and the discharge nozzle are both connected to the grinding cavity.

[0032] Furthermore, the adjustment mechanism includes a motor for driving the rotating grinding head to rotate, and the motor moves up and down together with the rotating grinding head;

[0033] Alternatively, the limiting part may be disposed at the end of the slide rail;

[0034] Alternatively, the initial grinding gap can be any position between 0 and 2 mm where the grinding gap between the stationary grinding cylinder and the moving grinding head is 0 mm.

[0035] Furthermore, the adjustment mechanism includes a lifting and retracting device and an adjustment seat connected to the adjusting rod. The adjustment seat is located above the lifting and retracting device to support the moving grinding head. The main unit is provided with a vertically extending strip-shaped opening, which forms the slide rail. The adjustment seat is provided with multiple mounting holes arranged along the extension direction of the strip-shaped opening. The adjusting rod passes through the strip-shaped opening and is fixed and released from the mounting holes to achieve locking and unlocking relative to the adjustment seat. When the adjusting rod is locked relative to the adjustment seat, the adjusting rod is fixed to the mounting hole and can move on the strip-shaped opening to push the adjustment seat and the moving grinding head up and down. The lifting and retracting device rises and retracts with the adjustment seat and supports the adjustment seat. When the adjusting rod is unlocked relative to the adjustment seat, the adjusting rod disengages from the mounting hole and cannot push the adjustment seat up and down. The limiting part is the end wall of the strip-shaped opening.

[0036] Existing grinding equipment for pulverizing materials has a certain grinding gap between the moving and stationary mills before it leaves the factory. This grinding gap can be understood as the initial grinding gap. The initial grinding gap is the distance between the moving and stationary mills before the material is ground. This initial grinding gap can be zero or non-zero. Users adjust the equipment based on the initial grinding gap, increasing it as needed. Therefore, the initial grinding gap of existing products can also be understood as the minimum grinding gap. If the initial grinding gap is not set accurately, or if it increases due to mechanical wear during use, it is difficult to guarantee that the fineness of the ground material meets the user's requirements.

[0037] In the grinding device of this invention, the adjusting rod is used to drive the adjusting mechanism to move, and the adjusting mechanism is used to drive the moving grinding head to move relative to the stationary grinding cylinder, thereby adjusting the grinding gap between the stationary grinding cylinder and the moving grinding head. The adjusting rod can be locked or unlocked relative to the adjusting mechanism. In the locked state, the adjusting rod can drive the adjusting mechanism to move, thereby driving the moving grinding head to move; in the unlocked state, the adjusting rod cannot drive the adjusting mechanism to move, and therefore cannot drive the moving grinding head to move. The difference between this invention and the prior art is that the adjusting rod has a first locking position and a second locking position relative to the adjusting mechanism. When the adjusting rod drives the adjusting mechanism to move in the first locking position, the moving grinding head can move to the initial grinding gap with the stationary grinding cylinder. When the moving grinding head and the stationary grinding cylinder are at the initial grinding gap, the adjusting rod can be unlocked from the first locking position relative to the adjusting mechanism and moved to the point where it abuts against the limiting part, then locked back onto the adjusting mechanism. At this time, the adjusting rod is in the second locking position on the adjusting mechanism, thus solidifying the initial grinding gap. Therefore, the initial grinding gap of the grinding device of this utility model is adjustable, and the adjustment can be solidified. This adjustable and solidified initial grinding gap ensures that the fineness of the ground material meets user requirements during subsequent grinding. Compared to existing grinding products with non-adjustable initial grinding gaps, the grinding device of this utility model is very simple and convenient to adjust, whether before or after leaving the factory. Even users can reset the initial grinding gap themselves, effectively solving the problem that existing grinding products require special tooling for adjustment before leaving the factory, and the adjustment method is very complex. Furthermore, due to manufacturing tolerances and assembly tolerances between components, the initial grinding gap may not meet actual requirements after adjustment. The solution of this utility model effectively solves this problem. In addition, it also solves the problem that even if the initial grinding gap is adjusted before leaving the factory, long-term wear and tear will cause the initial grinding gap to increase, resulting in the ground material powder not meeting user requirements regardless of subsequent adjustments.

[0038] For the grinding device of this utility model, the initial grinding gap can be the minimum grinding gap. During use, the user can adjust the grinding coarseness by increasing the grinding gap by pulling the adjustment rod based on the minimum grinding gap. Alternatively, the initial grinding gap can be the maximum grinding gap. During use, the user can adjust the grinding fineness by decreasing the grinding gap by pulling the adjustment rod based on the maximum grinding gap, thus achieving more reliable and flexible adjustment of the grinding coarseness according to needs. Attached Figure Description

[0039] The present invention will be further described below with reference to the accompanying drawings:

[0040] Figure 1 This is a schematic diagram of the structure of a grinding device according to a first embodiment of the present invention;

[0041] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the grinding device Figure 1 ;

[0042] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the grinding device Figure 2 ;

[0043] Figure 4 for Figure 1 Schematic diagram of the mating structure between the middle discharge shell and the lower shell;

[0044] Figure 5 for Figure 1 Enlarged structural diagram at point A;

[0045] Figure 6 for Figure 1 A schematic diagram of the exploded structure of the central adjustment mechanism;

[0046] Figure 7 for Figure 1 Schematic diagram of the coordination structure of the central adjustment mechanism;

[0047] Figure 8 for Figure 1 Top view of the central adjustment mechanism;

[0048] Figure 9 for Figure 8 A schematic diagram of the assembly structure of the middle adjusting rod and the adjusting ring;

[0049] Figure 10 This is a schematic diagram of the structural principle of Embodiment 2 of the grinding device of this utility model;

[0050] Figure 11 for Figure 10 A schematic diagram showing the movement of the adjustment lever on the slide rail of the main unit;

[0051] Figure 12 for Figure 10 A schematic diagram showing the adjustment rod being moved to position the second grinding piece in the initial grinding gap;

[0052] Figure 13 for Figure 10 A schematic diagram showing the middle adjusting rod moving to abut against the end wall of the slide rail. Detailed Implementation

[0053] The grinding device of this utility model can be used to grind dry materials into granules or powder. The grinding device includes: a main unit 1, a first grinding element 2 disposed in the main unit 1, a second grinding element 3 cooperating with the first grinding element 2, an adjusting mechanism 4 for adjusting the grinding gap between the first grinding element 2 and the second grinding element 3, and an adjusting rod 41 connected to the adjusting mechanism 4. The adjusting mechanism 4 is connected to the second grinding element 3 and is used to drive the second grinding element 3 to move. The adjusting rod 41 can be locked and unlocked relative to the adjusting mechanism 4. When the adjusting rod 41 is locked to the adjusting mechanism 4, the adjusting rod 41 can push the adjusting mechanism 4 to drive the second grinding element 3 to move; when the adjusting rod 41 is unlocked relative to the adjusting mechanism 4, the adjusting rod 41 is separated from the adjusting mechanism 4, so that the adjusting rod 41 cannot push the adjusting mechanism 4 to move, and the adjusting mechanism 4 cannot drive the second grinding element 3 to move. The grinding device also includes a slide rail, and the adjusting rod 41 can push the adjusting mechanism 4 to move along the extension direction of the slide rail. At the same time, the main unit 1 is provided with a limiting part 11 to prevent the adjusting rod 41 from moving continuously.

[0054] Example 1:

[0055] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 The diagram shown is a structural schematic of the first embodiment of a grinding device according to the present invention.

[0056] In this embodiment, as Figure 1 , Figure 2 As shown, the adjustment mechanism 4 includes a lifting seat 42 that is liftable and disposed within the mounting cavity of the main unit 1, and an adjustment ring 43 that is rotatable and disposed within the mounting cavity of the main unit 1. The second grinding piece 3 is supported by the lifting seat 42 and is driven by the lifting seat 42 to move up and down relative to the first grinding piece 2. The adjustment ring 43 is fitted onto the outer side of the lifting seat 42 and is in transmission cooperation with the lifting seat 42. The adjustment ring 43 rotates to drive the lifting seat 42 to move the second grinding piece 3 up and down. At the same time, the mounting cavity of the main unit 1 is also provided with an anti-rotation part to prevent and limit the rotation of the lifting seat 42, and a limiting groove 13 disposed on the inner peripheral wall of the mounting cavity of the main unit 1. The adjustment ring 43 is rotatably installed in the limiting groove 13 and is axially limited by the limiting groove 13. Since the limiting groove 13 restricts the axial movement of the adjusting ring 43, the adjusting ring 43 can drive the lifting seat 42 to rotate during the rotation process. However, the anti-rotation part provided on the main unit 1 restricts the rotation of the lifting seat 42. Therefore, during the rotation of the adjusting ring 43, the lifting seat 42 will move axially, thereby realizing the lifting seat 42 driving the second grinding workpiece 3 to rise and fall.

[0057] In this embodiment, the outer peripheral wall of the main unit 1 is provided with a strip-shaped opening 14 communicating with the limiting groove 13, and the slide rail is formed by the strip-shaped opening 14. The limiting part 11 is the outer wall of the main unit 1 located at the end of the strip-shaped opening 14. The adjusting rod 41 passes through the strip-shaped opening 14 and locks and unlocks relative to the adjusting ring 43. When the adjusting rod 41 is locked relative to the adjusting ring 43, the adjusting rod 41 can drive the adjusting ring 43 to rotate; when the adjusting rod 41 is unlocked relative to the adjusting ring 43, the adjusting rod 41 cannot drive the adjusting ring 43 to rotate.

[0058] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the main unit 1 includes a base 12 and a detachable main body 19 mounted on the base 12. The base 12 includes a lower housing 15 and an upper housing 18 connected to the lower housing 15. A motor 5 for driving the second grinding piece 3 to rotate is installed inside the lower housing 15. The limiting groove 13 is formed by the upper housing 18 and the lower housing 15. The strip-shaped opening 14 is a strip-shaped notch provided at the bottom of the upper housing 18. Of course, in this embodiment, the strip-shaped notch can also be provided at the top of the lower housing, or both the upper and lower housings can be provided with strip-shaped notches. When the upper and lower housings are installed, the strip-shaped notches on the upper and lower housings together form the strip-shaped opening.

[0059] The main body 19 includes a discharge shell 16 and an infeed shell 17 located above the discharge shell 16. The discharge shell 16 includes a grinding cylinder 161 with a grinding chamber and a discharge nozzle 162 disposed on one side of the grinding cylinder 161 and communicating with the grinding chamber. The upper shell 18 is provided with a bayonet 180. When the discharge shell 16 is installed on the upper shell 18, the discharge nozzle 162 is engaged in the bayonet 180 to realize the installation and positioning of the discharge shell 16 relative to the upper shell 18. Meanwhile, the feeding housing 17 includes a fixed cylinder 171 on which the first grinding element 2 is installed and a feeding chamber 172. The feeding housing 17 is detachably screwed onto the upper housing 18 so that the main body 19 can be detached from the base 12. When the main body 19 is installed on the base 12, the fixed cylinder 171 of the feeding housing 17 and the grinding cylinder 161 of the discharge housing 16 enclose each other to form a grinding cavity. The first grinding element 2 and the second grinding element 3 are located in the grinding cavity, and the feeding chamber 172 is located at the top of the grinding cavity and communicates with the grinding cavity.

[0060] In this embodiment, the second grinding element 3 is a moving grinding head, and the first grinding element 2 is a stationary grinding cylinder. The moving grinding head is located inside the stationary grinding cylinder and grinds with it. The stationary grinding cylinder is fixed within a fixed cylinder 171 with an interference fit. The side wall of the stationary grinding cylinder has a feed inlet 20 communicating with the feed chamber 172. The stationary grinding cylinder has a through-hole structure, and the moving grinding head extends into the stationary grinding cylinder from its bottom. A positioning hole 170 is provided at the top of the fixed cylinder 171, and the positioning head 30 at the top of the moving grinding head is inserted into the positioning hole 170 to achieve axial and radial positioning of the moving grinding head. Of course, in this embodiment, the stationary grinding cylinder and the fixed cylinder 171 can also be integrally formed, and the stationary grinding cylinder can also not have a through-hole structure, but instead have the positioning hole 170 located on the top wall of the stationary grinding cylinder, allowing the moving grinding head to be axially and radially positioned by the stationary grinding cylinder.

[0061] In this embodiment, as Figure 5 , Figure 6 , Figure 7 As shown, an mounting cylinder 183 is provided on the upper housing 18. The lifting seat 42 and the adjusting ring 43 are located inside and outside the mounting cylinder 183, respectively. Multiple protrusions 421 are arranged circumferentially on the outer wall of the lifting seat 42, and multiple clearance notches 184 corresponding to the protrusions 421 are provided on the side wall of the mounting cylinder 183. The protrusions 421 are fitted into the clearance notches 184 one by one and extend out of the clearance notches 184 to engage with the adjusting ring 43. The outer surface of the protrusions 421 is provided with external threads 422, while the inner circumferential wall of the adjusting ring 43 is provided with internal threads 432 that engage with the external threads 422. The adjusting ring 43 and the lifting seat 42 achieve transmission through threaded engagement. In this embodiment, the clearance notches 184 form an anti-rotation part to prevent the lifting seat 42 from rotating, so that the rotation of the adjusting ring 43 drives the lifting seat 42 to rise and fall.

[0062] In this embodiment, as Figure 8As shown, the adjusting ring 43 is provided with a groove 436 for accommodating the connecting block 6, and the outer peripheral wall of the adjusting ring 43 is provided with a strip-shaped mounting port 437 corresponding to the strip-shaped opening 14 and arranged in the same direction of extension. The groove 436 is connected to the strip-shaped mounting port 437. The adjusting rod 41 passes through the strip-shaped opening 14 and the strip-shaped mounting port 437 and extends into the groove 436 to connect with the connecting block 6. When the adjusting rod 41 is locked relative to the adjusting ring 43, the adjusting rod 41 and the connecting block 6 clamp and fix the adjusting ring 43, and the adjusting rod 41 can push the adjusting ring 43 to rotate. When the adjusting rod 41 is unlocked relative to the adjusting ring 43, the adjusting rod 41 can drive the connecting block 6 to slide in the groove 436 on the strip-shaped mounting port 437. Both the inner wall of the slide groove 436 and the outer wall of the connecting block 6 are provided with mating teeth (not marked in the figure). When the adjusting ring 43 is clamped and fixed by the adjusting rod 41 and the connecting block 6, the mating teeth on the slide groove 436 mesh with the mating teeth on the connecting block 6. The adjusting rod 41 drives the connecting block 6 to push the adjusting ring 43 to rotate, which can effectively prevent slippage between the connecting block 6 and the adjusting ring 43, and the adjusting ring 43 cannot be pushed by the adjusting rod 41. Of course, if the adjusting rod 41 and the connecting block 6 clamp the adjusting ring 43 too tightly, the mating teeth on the slide groove 436 and the connecting block 6 may not be provided.

[0063] like Figure 9 As shown, to better facilitate the installation of the adjusting rod 41 and the connecting block 6, in this embodiment, the adjusting rod 41 includes a rod body 411, a screw 412 for fixing the connecting block 6 to the rod body 411, and a rubber plug 413 for covering the outside of the screw hole. When the adjusting rod 41 is locked relative to the adjusting ring 43, the screw 412 is tightened, fixing the rod body 411 and the connecting block 6 tightly, thereby clamping and fixing the adjusting ring 43 with the rod body 411 and the connecting block 6. When the adjusting rod 41 is unlocked relative to the adjusting ring 43, the screw 412 is loosened. The screw 412 does not need to be removed from the rod body 411, keeping the screw 412 loosely connected to the connecting block 6. At this time, the rod body 411 and the connecting block 6 cannot clamp the adjusting ring 43, and the rod body 411 can even drive the connecting block 6 to slide in the groove 436 along the strip-shaped mounting opening 437. Compared to removing the adjusting rod 41 from the adjusting ring 43, keeping the rod 411 loosely connected to the connecting block can avoid the problem of the rod 411 being easily lost after being removed. On the other hand, it can also avoid the problem of the rod 411 being difficult to align with the connecting block 6 when it is reinstalled after being removed from the adjusting ring 43, which would cause great trouble for the installation.

[0064] In this embodiment, the adjusting rod can be locked and unlocked relative to the adjusting ring. In the locked state, the adjusting rod can push the adjusting ring to rotate, thereby using the transmission between the adjusting ring and the lifting seat to raise and lower the second grinding element relative to the first grinding element, thus adjusting the grinding gap between the first and second grinding elements. In the unlocked state, the adjusting rod is separated from the adjusting ring, and the adjusting rod cannot push the adjusting ring to rotate, thus preventing the second grinding element from raising or lowering. Because the adjusting rod has these two mating structures relative to the adjusting ring, the initial grinding gap between the first and second grinding elements can be adjusted using the adjusting rod. For example, the initial grinding gap can be adjusted to 0, meaning that when the second grinding element abuts against the first grinding element, the initial grinding gap is 0. The specific adjustment method is as follows:

[0065] 1) First, tighten the screws to lock the rod body and the connecting block, so that the adjusting rod is locked in the first locking position of the adjusting ring. Pull the adjusting rod to drive the adjusting ring to rotate. The rotation of the adjusting ring will trigger the lifting seat to drive the second grinding part to rise and fall. When the second grinding part rises to abut against the first grinding part, the second grinding part and the first grinding part are at the initial grinding gap of 0.

[0066] 2) When the second grinding part and the first grinding part are in the initial grinding gap, stop pulling the adjusting rod, loosen the screw, and the rod body and the connecting block are loosely connected, so that the adjusting rod is unlocked from the first locking position relative to the adjusting ring. Move the rod body along the strip-shaped mounting port, and the rod body drives the connecting block to slide in the slide groove, so that the adjusting rod moves from the first locking position to the point where it abuts against the limiting part. Tighten the screw again to clamp the rod body and the connecting block to fix the adjusting ring. At this time, the adjusting rod is locked in the second locking position of the adjusting ring.

[0067] Of course, in most cases, the initial grinding gap is not set to 0. Taking an initial grinding gap of 0.1mm as an example, the specific adjustment method is as follows:

[0068] 1) Lock the adjusting rod to the first locking position of the adjusting ring, and pull the adjusting rod to push the adjusting ring to rotate, so that the second grinding piece rises to the point where it abuts against the first grinding piece.

[0069] 2) After the second grinding piece comes into contact with the first grinding piece, pull the adjusting rod in the opposite direction to the pre-calculated angle (e.g., 6 degrees) so that the second grinding piece can be lowered to the position where the initial grinding gap with the first grinding piece is 0.1mm.

[0070] 3) Stop pulling the adjusting rod. The adjusting rod unlocks from the first locking position relative to the adjusting ring, causing the adjusting rod to move from the first locking position to the second locking position on the adjusting ring where it abuts against the limiting part. Thus, the initial grinding gap of 0.1mm is fixed, and the user can adjust the coarseness based on the initial grinding gap.

[0071] Therefore, in the grinding device of this embodiment, the initial grinding gap is adjustable, and the adjustment can be solidified. This adjustable and solidified initial grinding gap ensures that the fineness of the ground material meets user requirements during subsequent grinding processes. Compared to existing grinding products with non-adjustable initial grinding gaps, the grinding device of this embodiment is very simple and convenient to adjust, whether before or after leaving the factory. Even users can reset the initial grinding gap themselves, effectively solving the problem that existing grinding products require special tooling for adjustment before leaving the factory, and the adjustment method is very complex. Furthermore, due to manufacturing tolerances and assembly tolerances between components, the initial grinding gap may not meet actual requirements after adjustment. Additionally, it also solves the problem that even if the initial grinding gap is adjusted before leaving the factory, long-term wear and tear can cause the initial grinding gap to widen, resulting in the ground material powder not meeting user requirements regardless of subsequent adjustments.

[0072] It should be noted that, for the grinding device in this embodiment, the initial grinding gap can be the minimum grinding gap. During use, the user can adjust the grinding coarseness by increasing the grinding gap by moving the adjustment rod, based on the minimum grinding gap. Furthermore, the initial grinding gap can also be the maximum grinding gap. During use, the user can adjust the grinding fineness by decreasing the grinding gap by moving the adjustment rod, based on the maximum grinding gap, thus achieving more reliable and flexible adjustment of the grinding coarseness according to needs. Of course, for the initial grinding gap in this embodiment, it can be any position between 0 and 2 mm between the first and second grinding elements, with a preferred initial grinding gap of 0.05 mm to 1 mm, enabling free grinding from powder to particles.

[0073] It should be noted that the structure for locking and unlocking the adjusting rod relative to the adjusting ring is not limited to the scheme disclosed in this embodiment. Other implementation methods are also possible. For example, multiple mounting holes are arranged on the adjusting ring along the extension direction of the strip opening. The adjusting rod passes through the strip opening and can be fixed and released with any one of the mounting holes to achieve locking and unlocking of the adjusting rod relative to the adjusting ring. When the adjusting rod is locked relative to the adjusting ring, it is fixed in the mounting hole and can push the adjusting ring to rotate. When the adjusting rod is unlocked relative to the adjusting ring, it comes out of the mounting hole and cannot push the adjusting ring to rotate. When the second grinding element moves to the initial grinding gap with the first grinding element, the adjusting rod can be unlocked from the first mounting hole on the adjusting ring, then moved to the position abutting against the end of the strip opening, and finally locked back to the second mounting hole on the adjusting ring. With this scheme, when the adjusting rod is unlocked relative to the adjusting ring, it needs to be removed from the adjusting ring, and there is a risk that the adjusting rod may be lost after removal.

[0074] Based on this, the solution of this embodiment can also be referenced, with a strip-shaped mounting port provided on the adjusting ring. The extension direction of the strip-shaped mounting port is consistent with the extension direction of the strip-shaped opening. Multiple mounting holes are also arranged inside the adjusting ring along the extension direction of the slide rail, and these mounting holes communicate with the strip-shaped mounting port. The adjusting rod passes through the strip-shaped opening and the strip-shaped mounting port, and can be fixed and released with any one of the mounting holes to achieve locking and unlocking of the adjusting rod relative to the adjusting mechanism. When the adjusting rod is locked relative to the adjusting mechanism, it is fixed to the mounting hole and can push the adjusting mechanism to move. When the adjusting rod is unlocked relative to the adjusting mechanism, it comes out of the mounting hole, cannot push the adjusting mechanism to move, and can slide along the extension direction of the strip-shaped opening on the strip-shaped mounting port. The adjustment method for the initial grinding gap can still refer to the aforementioned method.

[0075] In this embodiment, the motor used to drive the second grinding element to rotate is fixed inside the lower housing. The motor does not move with the lifting seat. Of course, the motor can also be fixed on the lifting seat, so that the motor, the lifting seat, and the second grinding element move together. In this embodiment, the limiting part is located at the end of the slide rail. By using the end of the slide rail to limit the adjusting rod, the initial grinding gap can be solidified. Of course, theoretically, the limiting part is not limited to the end of the slide rail. If the slide rail is high enough, the limiting part can also be set at a certain position in the middle of the slide rail. The purpose is to solidify the initial grinding gap. When the adjusting rod moves to the point where it abuts the limiting part, it indicates that the second grinding element and the first grinding element are at the position of the initial grinding gap. The size of the grinding gap between the first grinding element and the second grinding element can be increased or decreased based on this position.

[0076] It should also be noted that in this embodiment, the second grinding element is a moving grinding head, and the first grinding element is a stationary grinding cylinder. Both belong to an axial flow grinding structure, and the adjustment mechanism drives the moving grinding head to rise and fall. Of course, the first and second grinding elements can also belong to a planar grinding structure, and one of them can be a stationary grinding element, while the other is a moving grinding element driven by a motor. That is to say, the adjustment mechanism can also move the stationary grinding element to achieve the initial grinding gap adjustment between the moving and stationary grinding elements.

[0077] It should be noted that, for this embodiment, the locking and unlocking method of the adjusting rod relative to the adjusting mechanism is based on the adjusting mechanism being a lifting mechanism. However, for other types of adjusting mechanisms, the implementation scheme and variations of this embodiment can also be applied to how to lock and unlock the adjusting rod relative to the adjusting mechanism. Similarly, the above-mentioned structural changes in this embodiment can also be applied to other embodiments of this utility model.

[0078] Example 2:

[0079] like Figure 10The diagram shown is a schematic diagram of the structure of the second type of grinding device of this utility model. This embodiment differs from the first embodiment in that: the grinding device includes a main unit 1 and an adjustment mechanism 4 disposed within the main unit 1. The adjustment mechanism 4 includes a lifting and retracting device 48 and an adjustment seat 49 connected to an adjustment rod 41. The adjustment seat 49 is located above the lifting and retracting device 48 to support the second grinding element 3. The main unit 1 is provided with a strip-shaped opening 14 forming a slide rail. The adjustment seat 49 is provided with multiple mounting holes (not shown in the figure) arranged along the extending direction of the strip-shaped opening 14. The adjustment rod 41 passes through the strip-shaped opening 14 and is fixed to the mounting hole. The adjusting rod 41 is locked relative to the adjusting seat 49 and can be released to achieve locking and unlocking. When the adjusting rod 41 is locked relative to the adjusting seat 49, the adjusting rod 41 is fixed in the mounting hole and can move on the strip opening 14 to push the adjusting seat 49 and the second grinding piece 3 to rise and fall. The lifting and retracting device 48 rises and retracts with the adjusting seat 49 and supports the adjusting seat 49. When the adjusting rod 41 is unlocked relative to the adjusting seat 49, the adjusting rod 41 is dislodged from the mounting hole and cannot push the adjusting seat 49 to rise and fall. The limiting part 11 is the end wall of the strip opening 14.

[0080] For this embodiment, as Figure 11 As shown, the adjusting rod 41 pushes the adjusting seat 49 upward in the first locked position, so that the second grinding element 3 moves to be in the initial grinding gap with the first grinding element 2. Figure 12 As shown, when the second grinding element 3 and the first grinding element 2 are at the initial grinding gap, the lifting and retracting device 48 holds the adjusting seat 49, and the adjusting rod 41 is unlocked from the first locking position relative to the adjusting seat 49. Figure 13 As shown, after the adjusting rod 41 is unlocked from the adjusting seat 49, the adjusting rod 41 is moved from the first locking position along the strip opening 14 to the end wall (i.e., the limiting part) that abuts against the strip opening 14, and then locked again to the second locking position on the adjusting seat 49 to solidify the initial grinding gap.

[0081] In this embodiment, the adjusting rod directly pushes the adjusting seat to raise and lower the second grinding element. Furthermore, the adjusting rod has multiple locking positions relative to the adjusting seat, and can also be unlocked relative to the adjusting seat. When locked, it raises the adjusting seat; when unlocked, it cannot raise or lower the adjusting seat. Therefore, this embodiment has the same beneficial effects as Embodiment 1, enabling adjustment and solidification of the initial grinding gap. Specific beneficial effects will not be elaborated here.

[0082] It should be noted that in this embodiment, the lifting and retracting device rises and retracts along with the adjusting seat and is used to support the adjusting seat. Therefore, the lifting and retracting device can be understood as a jack with a cylinder. Of course, other lifting and retracting devices that can rise and retract with the adjusting seat and also support the adjusting seat also fall within the scope of the lifting and retracting device in this embodiment.

[0083] Those skilled in the art will understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A grinding device with reliably adjustable grinding gap, characterized in that: include: Host; The static grinding cylinder is located inside the main unit; The moving grinding head is located inside the stationary grinding cylinder and works with the stationary grinding cylinder to grind the material; The adjustment mechanism, connected to the moving grinding head, is used to drive the moving grinding head to move relative to the stationary grinding cylinder, so as to adjust the grinding gap between the stationary grinding cylinder and the moving grinding head. The adjusting rod, exposed on the main unit, can be locked and unlocked relative to the adjusting mechanism. When the adjusting rod is locked to the adjusting mechanism, it can push the adjusting mechanism to drive the moving grinding head. When the adjusting rod is unlocked relative to the adjusting mechanism, it cannot push the adjusting mechanism to drive the moving grinding head. The slide rail allows the adjusting rod to push the adjusting mechanism along the extension direction of the slide rail, and the main unit is provided with a limiting part that can prevent the adjusting rod from moving continuously. The adjusting rod has a first locking position and a second locking position that are locked to the adjusting mechanism; The first locking position is used for the adjusting rod to push the adjusting mechanism to move, so that the moving grinding head and the stationary grinding cylinder are in the initial grinding gap. The second locking position is when the moving grinding head and the stationary grinding cylinder are in the initial grinding gap, the adjusting rod is unlocked relative to the adjusting mechanism in the first locking position, and the adjusting rod is moved from the first locking position to the position where it abuts against the limiting part and is locked onto the adjusting mechanism again.

2. The grinding apparatus according to claim 1, characterized in that: The adjustment mechanism is provided with a strip-shaped mounting opening that is aligned with the extension direction of the slide rail. The adjustment rod can be locked to the adjustment mechanism at any position of the strip-shaped mounting opening. When the adjustment rod is unlocked relative to the adjustment mechanism, it can slide along the extension direction of the slide rail on the strip-shaped mounting opening.

3. The grinding apparatus according to claim 2, characterized in that: The adjustment mechanism is provided with a sliding groove for accommodating the connecting block. The sliding groove is connected to the strip-shaped mounting port. The adjustment rod passes through the strip-shaped mounting port and extends into the sliding groove to connect with the connecting block. When the adjustment rod is unlocked relative to the adjustment mechanism, the adjustment rod can drive the connecting block to slide in the sliding groove on the strip-shaped mounting port. Alternatively, the adjustment mechanism may have multiple mounting holes arranged along the extension direction of the slide rail, and the mounting holes may communicate with the strip-shaped mounting opening. The adjustment rod can pass through the strip-shaped mounting opening and be fixed and released with any one of the mounting holes, so as to realize the locking and unlocking of the adjustment rod relative to the adjustment mechanism. When the adjustment rod is unlocked relative to the adjustment mechanism, the adjustment rod is released from the mounting hole, and the adjustment rod can slide on the strip-shaped mounting opening along the extension direction of the slide rail.

4. The grinding apparatus according to claim 1, characterized in that: The slide rail is a strip-shaped opening on the main unit. The adjustment mechanism has multiple mounting holes arranged along the extension direction of the strip-shaped opening. The adjustment rod passes through the strip-shaped opening and can be fixed and released with any one of the mounting holes to achieve locking and unlocking of the adjustment rod relative to the adjustment mechanism.

5. The grinding apparatus according to claim 1, characterized in that: The adjustment mechanism includes: The lifting seat is installed in the mounting cavity of the main unit in a height-adjustable manner. The moving grinding head is supported by the lifting seat and is driven by the lifting seat to move up and down relative to the stationary grinding cylinder. An adjusting ring is rotatably mounted inside the mounting cavity of the main unit. The adjusting ring is fitted onto the outside of the lifting seat and is in transmission cooperation with the lifting seat. The rotation of the adjusting ring drives the lifting seat to move the grinding head up and down. An anti-rotation part is provided in the mounting cavity of the main unit to prevent and limit the rotation of the lifting seat; A limiting groove is provided on the inner peripheral wall of the main unit mounting cavity, and the adjusting ring is rotatably installed in the limiting groove and is axially limited by the limiting groove; The outer peripheral wall of the main unit is provided with a strip-shaped opening that communicates with the limiting groove. The slide rail is formed by the strip-shaped opening. The adjusting rod passes through the strip-shaped opening and locks and unlocks relative to the adjusting ring.

6. The grinding apparatus according to claim 5, characterized in that: The adjusting ring has multiple mounting holes arranged along the extension direction of the strip opening. The adjusting rod passes through the strip opening and can be fixed and released with any one of the mounting holes, so as to realize the locking and unlocking of the adjusting rod relative to the adjusting ring. Alternatively, the adjusting ring may have a groove for accommodating the connecting block, and the outer peripheral wall of the adjusting ring may have a strip-shaped mounting port that corresponds to the strip-shaped opening and extends in the same direction. The groove and the mounting port are connected. The adjusting rod passes through the strip-shaped opening and the mounting port and extends into the groove to connect with the connecting block. When the adjusting rod is unlocked relative to the adjusting ring, the adjusting rod can drive the connecting block to slide in the groove on the mounting port.

7. The grinding apparatus according to claim 5, characterized in that: The mounting cavity of the main unit is provided with a mounting cylinder. The lifting seat and the adjusting ring are located inside and outside the mounting cylinder, respectively. The outer wall of the lifting seat is provided with a plurality of protrusions spaced apart along the circumference. The side wall of the mounting cylinder is provided with a plurality of clearance notches corresponding to the protrusions. The protrusions are fitted into the clearance notches one by one and extend out of the clearance notches to engage with the adjusting ring in a transmission manner. The clearance notches form the anti-rotation part. The outer surface of the protrusions is provided with external threads. The inner side wall of the adjusting ring is provided with internal threads that engage with the external threads. Alternatively, the host includes a lower housing and an upper housing connected to the lower housing, and the limiting groove is formed by the upper housing and the lower housing. Alternatively, the host unit includes a lower housing and an upper housing connected to the lower housing, wherein the strip opening is a strip notch provided at the bottom of the upper housing and / or the top of the lower housing.

8. The grinding apparatus according to claim 1, characterized in that: The main unit includes a separate base and a discharge housing. The discharge housing includes a grinding cylinder with a grinding chamber and a discharge nozzle located on one side of the grinding cylinder and communicating with the grinding chamber. The stationary grinding cylinder and the moving grinding head are located inside the grinding chamber. The base is provided with a bayonet. When the discharge housing is installed on the base, the discharge nozzle is engaged in the bayonet.

9. The grinding apparatus according to claim 1, characterized in that: The main unit includes a discharge housing and an infeed housing located above the discharge housing. The discharge housing includes a grinding cylinder with a moving grinding head and a discharge nozzle. The infeed housing includes a fixed cylinder with a stationary grinding cylinder and a feed chamber. When the infeed housing and the discharge housing are installed together, the fixed cylinder and the grinding cylinder enclose a grinding cavity. The feed chamber and the discharge nozzle are both connected to the grinding cavity.

10. The grinding apparatus according to claim 1, characterized in that: The adjustment mechanism includes a motor for driving the rotating grinding head to rotate, and the motor rises and falls together with the rotating grinding head; Alternatively, the limiting part may be disposed at the end of the slide rail; Alternatively, the initial grinding gap can be any position between 0 and 2 mm where the grinding gap between the stationary grinding cylinder and the moving grinding head is 0 mm.

11. The grinding apparatus according to claim 1, characterized in that: The adjustment mechanism includes a lifting and retracting device and an adjustment seat connected to an adjustment rod. The adjustment seat is located above the lifting and retracting device to support the moving grinding head. The main unit is provided with a vertically extending strip-shaped opening, which forms the slide rail. The adjustment seat is provided with multiple mounting holes arranged along the extension direction of the strip-shaped opening. The adjustment rod passes through the strip-shaped opening and is fixed and released from the mounting holes to achieve locking and unlocking relative to the adjustment seat. When the adjustment rod is locked relative to the adjustment seat, the adjustment rod is fixed to the mounting hole and can move on the strip-shaped opening to push the adjustment seat and the moving grinding head up and down. The lifting and retracting device rises and retracts with the adjustment seat and supports the adjustment seat. When the adjustment rod is unlocked relative to the adjustment seat, the adjustment rod disengages from the mounting hole and cannot push the adjustment seat up and down. The limiting part is the end wall of the strip-shaped opening.

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