A self-locking adjustment mechanism and a grinding device

Abstract

The present disclosure relates to a self-locking adjustment mechanism and a grinding device, a first transmission gear, the first transmission gear being connected to a first grinding disc; a second transmission gear, the second transmission gear meshing with the first transmission gear; a connecting sleeve, the connecting sleeve being connected to the second transmission gear; an adjustment knob, the adjustment knob being slidably disposed within the connecting sleeve and having its circumferential degree of freedom restricted by a limiting structure; a locking block, the locking block being connected to the adjustment knob such that the locking block moves synchronously with the adjustment knob, the sliding stroke of the locking block including a locking section and a rotating section; a locking structure being formed between the locking block and the frame, the locking structure being configured to limit the circumferential degree of freedom of the locking block when the locking block slides into the locking section, and one end of an elastic member being connected to the locking block and the other end being connected to the frame. The present disclosure has the advantages of wide applicability, good practicability, stable self-locking ability, and long service life.

Description

Technical Field

[0001] The present disclosure relates to the technical field of grinding equipment, and particularly to a self-locking adjustment mechanism and a grinding device. Background Art

[0002] In existing commercial grinding equipment, such as grinding equipment with a flat grinding structure, it mainly includes two grinding discs stacked up and down. The lower grinding disc is a driving grinding disc driven by a motor, and the upper grinding disc is a cooperating grinding disc. During grinding, materials enter between the upper and lower grinding discs. The motor drives the lower grinding disc to rotate, and the upper and lower grinding discs cooperate to grind the materials. The upper grinding disc is usually designed with a structure that rotates in a spiral fit with the machine frame. When the upper grinding disc rotates spirally relative to the machine frame, its height can be finely adjusted, so as to adjust the distance between the upper grinding disc and the lower grinding disc, and further adjust the fineness of the grinding particles of the grinding device. Usually, an adjustment mechanism is used to drive the upper grinding disc to rotate. The existing adjustment mechanisms generally adopt a worm and worm gear structure to drive the upper grinding disc to rotate. The worm and worm gear structure has the following defects:

[0003] Firstly, since the worm and worm gear structure cannot withstand axial force, the worm and worm gear structure can only be applied to horizontal (i.e., horizontal) adjustment methods and cannot be applied to vertical adjustment methods, and its application has certain limitations;

[0004] Secondly, the worm and worm gear structure has precise cooperation and a complex structure. It is more troublesome to install, occupies a large installation space, resulting in a larger overall volume of the machine, and its manufacturing cost is high, increasing the overall cost of the machine;

[0005] Thirdly, the worm and worm gear mainly play a transmission role, and its self-locking ability is poor. When subjected to a large external force, it is prone to displacement. Moreover, as the service life increases, the wear of the threads at the mating positions will exacerbate the problem of its poor self-locking ability. The inability to effectively self-lock will cause the position of the upper grinding disc to be unable to be fixed, which will lead to the up and down displacement of the upper grinding disc during the grinding process and affect the uniformity of the fineness of the grinding particles.

[0006] In summary, in the existing grinding devices, the distance between the upper and lower grinding discs is mainly adjusted through the worm and worm gear structure. This structure has defects such as limited application, poor practicability, poor self-locking ability, and short service life. Summary of the Invention

[0007] In order to solve the above problems existing in the prior art, one of the purposes of the present disclosure is to provide a self-locking adjustment mechanism, and the second purpose is to provide a grinding device. The present disclosure has the advantages of wide applicability, good practicability, stable self-locking ability, and long service life.

[0008] A self-locking adjustment mechanism described in the present disclosure is applied to a grinding device. The grinding device includes a frame, a first grinding disc, and a second grinding disc. The first grinding disc and the second grinding disc are stacked vertically on the frame, and the first grinding disc is in screw rotational connection with the frame and can adjust the distance between the first grinding disc and the second grinding disc as the first grinding disc rotates; the self-locking adjustment mechanism includes:

[0009] A first transmission gear, which is coaxially arranged with the first grinding disc and connected to the first grinding disc;

[0010] A second transmission gear, which is arranged beside the first transmission gear and meshes with the first transmission gear;

[0011] A connecting sleeve, which is coaxially arranged with the second transmission gear and connected to the second transmission gear. The connecting sleeve is rotatably arranged on the frame;

[0012] An adjustment knob, which is slidably arranged in the connecting sleeve and is restricted in its circumferential degree of freedom by a limiting structure so that the adjustment knob rotates synchronously with the connecting sleeve;

[0013] A locking block, which is connected to the adjustment knob so that the locking block moves synchronously with the adjustment knob. The sliding stroke of the locking block includes a locking section and a rotating section; a locking structure is formed between the locking block and the frame. The locking structure is used to limit the circumferential degree of freedom of the locking block when the locking block slides into the locking section, and when the locking block slides into the rotating section, it disengages from the locking structure so that the locking block can rotate circumferentially;

[0014] An elastic member, one end of which is connected to the locking block and the other end is connected to the frame. The elastic member is arranged such that when the locking block moves to the rotating section, the elastic member is compressed, causing the locking block to have a tendency to slide towards the locking section.

[0015] Preferably, the limiting structure includes at least one limiting rib extending in the vertical direction formed on the outer side surface of the adjustment knob, and a limiting groove formed on the inner side surface of the connecting sleeve and adapted to the limiting rib;

[0016] Alternatively, the limiting structure includes at least one limiting rib extending in the vertical direction formed on the inner side surface of the connecting sleeve, and a limiting groove formed on the outer side surface of the adjustment knob and adapted to the limiting rib.

[0017] Preferably, the number of the limiting ribs is three, and the three limiting ribs are arranged at equal intervals around the axis position of the adjusting knob / the connecting sleeve. The number and arrangement position of the limiting grooves are adapted to the limiting ribs.

[0018] Preferably, the self-locking adjusting mechanism further includes a mounting bracket, on which a mounting groove is formed. The connecting sleeve, the adjusting knob, the locking block and the elastic member are all arranged on the mounting groove, and the mounting bracket is connected to the machine frame.

[0019] Preferably, the locking structure includes a plurality of locking ribs extending in the up-and-down direction formed on the outer side surface of the locking block, and a plurality of locking grooves formed on the inner side surface of the mounting groove and adapted to the locking ribs. The plurality of locking grooves are arranged in a circular pattern around the axis position of the mounting groove;

[0020] Alternatively, the locking structure includes a plurality of locking ribs extending in the up-and-down direction formed on the inner side surface of the mounting groove, and a plurality of locking grooves formed on the outer side surface of the locking block and adapted to the locking ribs. The plurality of locking grooves are arranged in a circular pattern around the axis position of the locking block.

[0021] Preferably, one end of the locking groove facing the rotating section is opened to both sides to form a notch.

[0022] Preferably, the number of the locking grooves is n, the interval angle between two adjacent locking grooves is α, and the opening angle of the notch is β, and they satisfy:

[0023]

[0024] α + β = 165°.

[0025] Preferably, the number of the locking ribs is eight, and four of the locking ribs are distributed on one side of the outer side surface of the locking block / the inner side surface of the mounting groove, and the other four locking ribs are distributed on the other side of the outer side surface of the locking block / the inner side surface of the mounting groove.

[0026] Preferably, a socket column protruding upward is formed at the bottom of the mounting groove, a avoiding groove for avoiding the socket column is formed by upward depression on the lower surface of the locking block, the elastic member is a compression spring, the compression spring is sleeved outside the socket column, one end of the compression spring is connected to the bottom of the mounting groove, and the other end is connected to the top surface of the avoiding groove.

[0027] The present disclosure also provides a grinding device, including a frame, a first grinding disc and a second grinding disc. The first grinding disc and the second grinding disc are stacked vertically on the frame, and the first grinding disc is rotationally connected to the frame in a spiral manner and can adjust the distance between the first grinding disc and the second grinding disc as the first grinding disc rotates. The grinding device further includes the self-locking adjustment mechanism as described above. The first transmission gear of the self-locking adjustment mechanism is coaxially arranged with and connected to the first grinding disc and is used to drive the first grinding disc to rotate.

[0028] The advantages of the self-locking adjustment mechanism and the grinding device according to the present disclosure are as follows:

[0029] The present disclosure provides components such as a first transmission gear and a second transmission gear. The second transmission gear and the connecting sleeve are of an integral structure. The adjustment knob is connected to the locking block. The adjustment knob and the connecting sleeve are synchronously rotated through a limiting structure. The sliding stroke of the locking block includes a locking section and a rotating section. When the adjustment knob is pushed to drive the locking block to slide into the rotating section, the locking block disengages from the locking structure and obtains the freedom of circumferential rotation. At this time, when the adjustment knob is rotated, the adjustment knob drives the connecting sleeve to rotate circumferentially, and then drives the second transmission gear to rotate. The second transmission gear drives the first transmission gear to rotate, and the first transmission gear drives the first grinding disc to rotate synchronously. Due to the spiral connection structure of the first grinding disc, the first grinding disc will simultaneously move slightly in the vertical direction when it rotates, thereby finely adjusting the distance between the first grinding disc and the second grinding disc, and thus adjusting the fineness of the grinding particles. After the adjustment is completed, the adjustment knob is released, and the locking block slides into the locking section under the elastic force of the elastic member and cooperates with the frame through the locking structure. At this time, the circumferential freedom of the locking block is restricted by the locking structure and cannot rotate circumferentially, so that the whole formed by the locking block, the connecting sleeve and the adjustment knob cannot rotate circumferentially. The second transmission gear integrated with the connecting sleeve and the first transmission gear meshing with the second transmission gear also cannot rotate. At this time, the position of the first grinding disc is fixed, realizing the locking of the distance between the first grinding disc and the second grinding disc.

[0030] The present disclosure uses transmission gears for transmission, avoiding the limitation that worm gears cannot withstand axial forces. Its setting method is not restricted, and its applicability is more extensive.

[0031] The self-locking adjustment mechanism of the present disclosure has a simple structure, low requirements for processing and assembly accuracy, is easy to install, occupies a small installation space, is beneficial to the miniaturization of the whole machine volume, and its component cost is low, which can effectively reduce the cost of the whole machine.

[0032] The present disclosure restricts the rotation of the first grinding disc through a locking mechanism, which has strong self-locking ability and can keep the position of the first grinding disc fixed even under large external forces. Moreover, it avoids the wear problem of the worm and worm gear. Its overall self-locking ability, self-locking stability, and service life are significantly improved compared with the worm and worm gear structure. It can keep the distance between the two grinding discs fixed, prevent the first grinding disc from shifting up and down during the grinding process, keep the fineness of the grinding particles uniform and stable, and is beneficial to improving the grinding performance of the grinding device. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of the grinding device described in the present disclosure;

[0034] Figure 2 is Figure 1 a sectional view of;

[0035] Figure 3 is one of the schematic structural diagrams of the frame and the mounting bracket described in the present disclosure;

[0036] Figure 4 is another schematic structural diagram of the frame and the mounting bracket described in the present disclosure;

[0037] Figure 5 is Figure 4 a schematic structural diagram of the position A in;

[0038] Figure 6 is a schematic structural diagram of the first grinding disc described in the present disclosure;

[0039] Figure 7 is a schematic structural diagram of the connecting sleeve and the second transmission gear described in the present disclosure;

[0040] Figure 8 is a schematic structural diagram of the adjusting knob described in the present disclosure;

[0041] Figure 9 is a schematic structural diagram of the locking block described in the present disclosure.

[0042] Description of the Reference Numerals: 10 - frame, 101 - spiral groove, 20 - first grinding disc, 201 - spiral rib, 30 - second grinding disc, 40 - first transmission gear, 50 - second transmission gear, 60 - connecting sleeve, 601 - limiting groove, 70 - adjusting knob, 701 - limiting rib, 80 - locking block, 801 - locking rib, 802 - avoiding groove, 90 - elastic member, 100 - mounting bracket, 1001 - mounting groove, 1002 - locking groove, 10021 - notch, 1003 - socket column. Detailed Embodiments

[0043] As Figures 1-8As shown in the figure, a self-locking adjustment mechanism described in the present disclosure is applied to a grinding device. The grinding device includes a frame 10, a first grinding disc 20, and a second grinding disc 30. The first grinding disc 20 and the second grinding disc 30 are stacked vertically on the frame 10, and the first grinding disc 20 is in screw rotational connection with the frame 10, so that the first grinding disc 20 can rotate in a screw manner on the frame 10 and undergo a small displacement in the vertical direction during screw rotation to finely adjust the distance between the first grinding disc 20 and the second grinding disc 30. That is, when finely adjusting the distance between the two grinding discs, it is necessary to drive the first grinding disc 20 to rotate, and at the same time, self-locking needs to be achieved after the adjustment is completed to keep the position of the first grinding disc 20 fixed to ensure the uniformity of the particle size of the grinding particles. Based on this, the self-locking adjustment mechanism of the present disclosure is realized through the following structure.

[0044] The self-locking adjustment mechanism includes:

[0045] A first transmission gear 40, the first transmission gear 40 is coaxially arranged with the first grinding disc 20, that is, arranged with the same axis, and the first transmission gear 40 is connected to the first grinding disc 20, so that the first transmission gear 40 and the first grinding disc 20 can rotate synchronously, that is, the first grinding disc 20 is driven to rotate through the first transmission gear 40.

[0046] A second transmission gear 50, the second transmission gear 50 is arranged beside the first transmission gear 40 and meshes with the first transmission gear 40. When the second transmission gear 50 rotates, it drives the first transmission gear 40 to rotate, and then drives the first grinding disc 20 to rotate.

[0047] A connecting sleeve 60, the connecting sleeve 60 is a cylindrical sleeve with a hollow interior. The connecting sleeve 60 is coaxially arranged with the second transmission gear 50 and is connected to the second transmission gear 50. Specifically, the connecting sleeve 60 and the second transmission gear 50 can be set as an integral structure so that the two can rotate synchronously. The second transmission gear 50 is sleeved outside the connecting sleeve 60, and the connecting sleeve 60 is rotatably arranged on the frame 10.

[0048] An adjustment knob 70, the adjustment knob 70 is cylindrical, and it is slidably arranged up and down in the connecting sleeve 60, and the freedom degree of the adjustment knob 70 in the circumferential direction is restricted by a limiting structure, so that when the adjustment knob 70 is rotated, it drives the connecting sleeve 60 and the second transmission gear 50 to rotate synchronously.

[0049] A locking block 80, the locking block 80 is cylindrical, and it is arranged below the adjustment knob 70 and connected to the adjustment knob 70, so that the locking block 80 can slide and rotate synchronously with the adjustment knob 70. The sliding stroke of the locking block 80 is divided into two sections, namely a locking section and a rotating section. Specifically, in this embodiment, the locking section is located in the upper section of the sliding stroke, and the rotating section is located in the lower section of the sliding stroke. When the locking block 80 slides up and down with the adjustment knob 70, it can slide and switch between the locking section and the rotating section.

[0050] A locking structure is formed between the locking block 80 and the frame 10. The locking structure is used to limit the circumferential degree of freedom of the locking block 80 when the locking block 80 slides into the locking section. In this state, the overall circumferential degree of freedom of the locking block 80, the adjusting knob 70, the connecting sleeve 60, and the second transmission gear 50 is locked, and the second transmission gear 50 cannot rotate. As a result, the engaged first transmission gear 40 cannot rotate, and the position of the first grinding disc 20 is kept fixed. When the locking block 80 slides into the rotating section, it disengages from the locking mechanism, and the locking block 80 can rotate circumferentially, that is, the overall of the locking block 80, the adjusting knob 70, the connecting sleeve 60, and the second transmission gear 50 has circumferential movement freedom. By rotating the adjusting knob 70, the second transmission gear 50 can be driven to rotate, and then the first grinding disc 20 can be driven to rotate to adjust the distance between the first grinding disc 20 and the second grinding disc 30.

[0051] An elastic member 90, one end of the elastic member 90 is connected to the locking block 80, and the other end is connected to the frame 10. The elastic member 90 is arranged such that when the locking block 80 moves into the rotating section, the elastic member 90 is compressed, causing the locking block 80 to have a tendency to slide towards the locking section. When the locking block 80 moves into the rotating section, the operator can adjust the distance between the first grinding disc 20 and the second grinding disc 30. After the adjustment is completed, the external force applied to the adjusting knob 70 is removed, and the elastic member 90 pushes the locking block 80 upwards, causing the locking block 80 to move upwards into the locking section and continuously providing elastic force to keep the locking block 80 in the locking section, maintaining the self-locking state to ensure that the first grinding disc 20 does not shift during the grinding process.

[0052] The present disclosure is provided with components such as a first transmission gear 40 and a second transmission gear 50. The second transmission gear 50 and the connecting sleeve 60 are of an integral structure. The adjusting knob 70 is connected to the locking block 80. Synchronous rotation between the adjusting knob 70 and the connecting sleeve 60 is achieved through a limiting structure. The sliding stroke of the locking block 80 includes a locking section and a rotating section. When the adjusting knob 70 is pushed, causing the adjusting knob 70 to drive the locking block 80 to slide into the rotating section, the locking block 80 disengages from the locking structure and obtains the freedom of circumferential rotation. At this time, when the adjusting knob 70 is rotated, the adjusting knob 70 drives the connecting sleeve 60 to rotate circumferentially, thereby driving the second transmission gear 50 to rotate. The second transmission gear 50 drives the first transmission gear 40 to rotate, and the first transmission gear 40 drives the first grinding disc 20 to rotate synchronously. Due to the helical connection structure of the first grinding disc 20, when the first grinding disc 20 rotates, it will simultaneously move slightly in the up and down directions, thereby finely adjusting the distance between the first grinding disc 20 and the second grinding disc 30, and thus adjusting the fineness of the grinding particles. After the adjustment is completed, the adjusting knob 70 is released, and the locking block 80 slides into the locking section under the elastic force of the elastic member 90 and cooperates with the frame 10 through the locking structure. At this time, the circumferential freedom of the locking block 80 is restricted by the locking structure and cannot rotate circumferentially, thereby preventing the overall structure composed of the locking block 80, the connecting sleeve 60, and the adjusting knob 70 from rotating circumferentially. The second transmission gear 50 integrated with the connecting sleeve 60 and the first transmission gear 40 meshing with the second transmission gear 50 also cannot rotate. At this time, the position of the first grinding disc 20 is fixed, realizing the locking of the distance between the first grinding disc 20 and the second grinding disc 30.

[0053] The present disclosure is driven by transmission gears, avoiding the limitation that worm gears cannot withstand axial forces. Its setting method is not restricted, and its applicability is more extensive.

[0054] The self-locking adjustment mechanism of the present disclosure has a simple structure, low requirements for processing and assembly accuracy, convenient installation, small installation space occupation, which is beneficial to the miniaturization of the overall machine volume. Moreover, its component cost is low, which can effectively reduce the overall machine cost.

[0055] The present disclosure restricts the rotation of the first grinding disc 20 through a locking mechanism. It has strong self-locking ability and can keep the position of the first grinding disc 20 fixed even under large external forces. Moreover, it avoids the wear problem of using worm gears. Its overall self-locking ability, self-locking stability, and service life are significantly improved compared with the worm gear structure. It can keep the distance between the two grinding discs fixed, prevent the first grinding disc 20 from shifting up and down during the grinding process, and keep the fineness of the grinding particles uniform and stable, which is beneficial to improving the grinding performance of the grinding device.

[0056] Further, in this embodiment, please refer in detail to Figure 7 、 Figure 8, the limiting structure includes at least one limiting rib 701 formed on the outer side surface of the adjusting knob 70 and extending in the vertical direction, and a limiting groove 601 formed on the inner side surface of the connecting sleeve 60 and adapted to the limiting rib 701. Specifically, both the limiting rib 701 and the limiting groove 601 extend in the vertical direction. When the adjusting knob 70 is inserted into the connecting sleeve 60, the limiting rib 701 is aligned with the limiting groove 601, and the limiting rib 701 is inserted into the limiting groove 601. In this state, due to the limiting effect of the limiting rib 701 and the limiting groove 601, the connecting sleeve 60 and the adjusting knob 70 cannot rotate relative to each other, and thus the connecting sleeve 60 and the adjusting knob 70 can maintain a synchronous rotation state.

[0057] In other alternative embodiments, the arrangement positions of the limiting rib 701 and the limiting groove 601 can be exchanged between the two components. Specifically, the limiting structure includes at least one limiting rib 701 formed on the inner side surface of the connecting sleeve 60 and extending in the vertical direction, and a limiting groove 601 formed on the outer side surface of the adjusting knob 70 and adapted to the limiting rib 701. The above structure can also achieve the effect of restricting the relative rotation of the adjusting knob 70 and the connecting sleeve 60, and can be selected according to actual needs. The above limiting structure has the advantages of simple structure, convenient processing and assembly.

[0058] Furthermore, in this embodiment, the number of the limiting ribs 701 is three, and the three limiting ribs 701 are arranged at equal intervals around the axis position of the adjusting knob 70 / connecting sleeve 60, that is, the interval between two adjacent limiting ribs 701 is 60°. The number and arrangement position of the limiting grooves 601 are adapted to the limiting ribs 701. The structure of the three limiting ribs 701 can make the limiting structure have a stable limiting effect.

[0059] Furthermore, in this embodiment, it further includes a mounting bracket 100. The mounting bracket 100 is specifically a hollow circular ring-shaped mounting bracket 100, and a mounting groove 1001 is formed in the middle thereof, and the bottom is closed by an end cover to support each component. The connecting sleeve 60, the adjusting knob 70, the locking block 80 and the elastic member 90 are all arranged on the mounting groove 1001, and the mounting bracket 100 is connected to the machine frame 10, that is, the self-locking adjustment mechanism of the present disclosure is mounted on the machine frame 10 through the mounting bracket 100, which can facilitate the overall disassembly and assembly of the self-locking adjustment mechanism and improve the assembly efficiency.

[0060] Furthermore, in this embodiment, please refer in detail to Figure 3 、 Figure 4 and Figure 9, the locking structure includes locking ribs 801 formed on the outer side surface of the locking block 80 and extending in the vertical direction. The locking ribs 801 are strip-shaped, and multiple locking grooves 1002 formed on the inner side surface of the mounting groove 1001 and adapted to the locking ribs 801. The number of the locking grooves 1002 is more than that of the locking ribs 801. The multiple locking grooves 1002 are arranged in a circumferential pattern around the axis position of the mounting groove 1001 to be evenly distributed on the inner side surface of the mounting groove 1001. Specifically, the locking grooves 1002 are distributed at the positions corresponding to the locking section on the inner side surface of the mounting groove 1001, that is, the upper part of the mounting groove 1001. The notch positions of the locking grooves 1002 face vertically downward, and the rotating section is located below the locking grooves 1002. There is no limiting structure in the rotating section, and there is no rotational interference with the locking block 80. When the adjusting knob 70 drives the locking block 80 to move into the rotating section, the locking block 80 can rotate freely. When the locking block 80 moves upward under the action of the elastic member 90 and the locking ribs 801 on the outer side surface of the locking block 80 are inserted into the locking grooves 1002 on the inner side surface of the mounting groove 1001, at this time, due to the limiting structure of the cooperation between the locking ribs 801 and the locking grooves 1002, the locking block 80 cannot rotate, realizing self-locking. The structure that the number of the locking grooves 1002 is more than that of the locking ribs 801 and the locking grooves 1002 are evenly distributed on the inner side surface of the mounting groove 1001 is to ensure that when the locking block 80 rotates to any angle, there is a corresponding locking groove 1002 at this position that can cooperate with it, thereby realizing a stable self-locking function.

[0061] In other alternative embodiments, the setting positions of the locking ribs 801 and the locking grooves 1002 can be exchanged between the two components. Specifically, the locking structure includes several locking ribs 801 formed on the inner side surface of the mounting groove 1001 and extending in the vertical direction, and multiple locking grooves 1002 formed on the outer side surface of the locking block 80 and adapted to the locking ribs 801. The multiple locking grooves 1002 are arranged in a circumferential pattern around the axis position of the locking block 80. The above structure can also limit the rotation of the locking block 80 through the cooperation of the locking ribs 801 and the locking grooves 1002, and can be selected according to actual requirements.

[0062] Furthermore, in this embodiment, at one end of the locking groove 1002 facing the rotating section, that is, the lower end in this embodiment, is formed with a notch 10021 that opens to both sides. When the locking rib 801 moves to the lower end position of the locking groove 1002, it contacts the notch 10021. The notch 10021 can guide the locking rib 801 to be inserted into the locking groove 1002. The notch 10021 structure can ensure that the locking rib 801 is stably inserted into the locking groove 1002 to realize self-locking, so as to improve the stability of the self-locking adjustment mechanism.

[0063] Further, in this embodiment, since the locking grooves 1002 are evenly distributed, the number of the locking grooves 1002 affects the interval angle between two adjacent locking grooves 1002, and the interval angle between two adjacent locking grooves 1002 affects the distance between the locking grooves 1002, thereby affecting the angle of the opening 10021 that can be opened. When the opening angle of the opening 10021 is too large, it is also easy to occur that the locking rib 801 is stuck at the position of the opening 10021 during insertion. In order to further improve the stability of the cooperation between the locking rib 801 and the locking groove 1002 and avoid the stuck phenomenon, in this embodiment, the number of the locking grooves 1002 is set to n, the interval angle between two adjacent locking grooves 1002 is α, and the opening angle of the opening 10021 is β, and the following is satisfied:

[0064]

[0065] α + β = 165°.

[0066] The above-mentioned interval angle of the locking groove 1002 and the angle of the opening 10021 have the advantages of moderate angle, stable cooperation between the locking rib 801 and the locking groove 1002, and not easy to be stuck.

[0067] Further, in this embodiment, the number of the locking ribs 801 is eight. The two sides of the lower part of the locking block 80 extend outward to form extension parts. Four of the locking ribs 801 are distributed on one side of the outer side surface of the locking block 80 / the inner side surface of the installation groove 1001, and the other four locking ribs 801 are distributed on the other side of the outer side surface of the locking block 80 / the inner side surface of the installation groove 1001. The locking ribs 801 are symmetrically distributed. Matching the structure of the circumferential uniform distribution of the locking grooves 1002 can make the cooperation between the locking ribs 801 and the locking grooves 1002 stable.

[0068] Further, in this embodiment, a socket column 1003 protruding upward is formed at the bottom of the installation groove 1001. A avoidance groove 802 for avoiding the socket column 1003 is formed by upward depression on the lower surface of the locking block 80 for avoiding when the locking block 80 slides up and down. The elastic member 90 is specifically a compression spring. The compression spring is sleeved outside the socket column 1003. One end of the compression spring is connected to the bottom of the installation groove 1001, and the other end is connected to the top surface of the avoidance groove 802. The compression spring can provide stable elastic force, so that the locking block 80 always has a tendency to protrude upward, so that the self-locking adjustment mechanism maintains a self-locking state when not affected by external forces.

[0069] The working process of the self-locking adjustment mechanism of this embodiment will be fully described below in combination with the above content.

[0070] Please refer in detail to Figure 2, the limiting rib 701 is inserted into the limiting groove 601, so that the adjusting knob 70 and the connecting sleeve 60 rotate synchronously in the circumferential direction, and further, the locking block 80, the connecting sleeve 60, the adjusting knob 70 and the second transmission gear 50 have the same circumferential rotational freedom. When the self-locking adjustment mechanism is in a state without external force, the elastic member 90 generates an upward elastic force, causing the locking block 80 to move upward until the locking rib 801 is inserted into the locking groove 1002. In this state, due to the limiting effect of the locking structure, the locking block 80 cannot rotate relative to the mounting frame 100, and its circumferential movement freedom is restricted. Then, the overall circumferential movement freedom of the locking block 80, the connecting sleeve 60, the adjusting knob 70 and the second transmission gear 50 is also restricted, and further, the first transmission gear 40 and the first grinding disc 20 cannot rotate, so that the distance between the first grinding disc 20 and the second grinding disc 30 remains fixed. This state is the self-locking state.

[0071] When it is necessary to adjust the distance between the first grinding disc 20 and the second grinding disc 30, press down the adjusting knob 70, so that the adjusting knob 70 drives the locking block 80 to slide downward into the rotation section. During this process, the elastic member 90 is compressed by force, and the locking block 80 disengages from the locking structure and restores the circumferential rotational freedom. Then, the locking block 80, the connecting sleeve 60, the adjusting knob 70 and the second transmission gear 50 restore the rotational freedom. Rotating the adjusting knob 70 can drive the second transmission gear 50 to rotate, and further drive the first transmission gear 40 and the first grinding disc 20 to rotate, so as to adjust the distance between the first grinding disc 20 and the second grinding disc 30.

[0072] After the adjustment is completed, release the adjusting knob 70, and the elastic member 90 releases the elastic potential energy, causing the locking block 80 to move upward until the locking rib 801 is inserted into the locking groove 1002, restoring the self-locking state, and remaining in the self-locking state under the elastic force of the elastic member 90.

[0073] This disclosure has the advantages of wide applicability, good practicability, stable self-locking ability and long service life.

[0074] This embodiment also provides a grinding device, including a frame 10, a first grinding disc 20 and a second grinding disc 30. The first grinding disc 20 and the second grinding disc 30 are stacked up and down on the frame 10, and the first grinding disc 20 is rotationally connected to the frame 10 in a spiral manner and can adjust the distance between the first grinding disc 20 and the second grinding disc 30 as the first grinding disc 20 rotates; Please refer in detail to Figure 3 、 Figure 6, Specifically, the frame 10 is disc-shaped and hollow inside. The first grinding disc 20 and the second grinding disc 30 are stacked vertically inside the frame 10. A spiral groove 101 is formed on the inner side surface of the frame 10. The spiral groove 101 extends along the inner side surface of the frame 10 at a certain slope. A spiral rib 201 adapted to the spiral groove 101 is formed on the outer side surface of the first grinding disc 20. The spiral rib 201 is arranged in the spiral groove 101 and can slide along the spiral groove 101. When the first grinding disc 20 rotates inside the frame 10, the spiral rib 201 slides along the spiral groove 101. And due to the structure of the spiral groove 101 having a certain slope, the first grinding disc 20 can have a small displacement in the up and down directions, thereby realizing fine adjustment of the distance between the first grinding disc 20 and the second grinding disc 30.

[0075] The grinding device of this embodiment further includes the self-locking adjustment mechanism described above. The first transmission gear 40 of the self-locking adjustment mechanism is coaxially arranged with the first grinding disc 20 and connected to the first grinding disc 20 to drive the first grinding disc 20 to rotate.

[0076] Due to the application of the above self-locking adjustment mechanism, the grinding device of this embodiment has the advantages of wide applicability, good practicability, stable self-locking ability and long service life.

[0077] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present disclosure.

[0078] For those skilled in the art, according to the technical solutions and concepts described above, various corresponding changes and deformations can be made, and all of these changes and deformations should fall within the protection scope of the claims of the present disclosure.

Claims

1. A self-locking adjustment mechanism is applied to a grinding device. The grinding device includes a frame, a first grinding disc and a second grinding disc. The first grinding disc and the second grinding disc are stacked up and down on the frame, and the first grinding disc is rotationally connected to the frame in a spiral manner and adjusts the distance between the first grinding disc and the second grinding disc as the first grinding disc rotates; characterized in that, The self-locking adjustment mechanism includes: A first transmission gear, which is coaxially arranged with the first grinding disc and connected to the first grinding disc; A second transmission gear, which is arranged beside the first transmission gear and meshes with the first transmission gear; A connecting sleeve, which is coaxially arranged with the second transmission gear and connected to the second transmission gear, and the connecting sleeve is rotatably arranged on the frame; An adjustment knob, which is slidably arranged up and down in the connecting sleeve, and the freedom degree of the adjustment knob in the circumferential direction is restricted by a limiting structure, so that the adjustment knob rotates synchronously with the connecting sleeve; A locking block, which is connected to the adjustment knob, so that the locking block moves synchronously with the adjustment knob, and the sliding stroke of the locking block includes a locking section and a rotating section; a locking structure is formed between the locking block and the frame, and the locking structure is used to limit the freedom degree of the locking block in the circumferential direction when the locking block slides into the locking section, and when the locking block slides into the rotating section, it disengages from the locking structure, so that the locking block rotates circumferentially; An elastic member, one end of the elastic member is connected to the locking block, and the other end is connected to the frame, and the elastic member is arranged such that when the locking block moves to the rotating section, the elastic member is compressed, so that the locking block has a movement tendency to slide towards the locking section.

2. The self-locking adjustment mechanism according to claim 1, characterized in that, The limiting structure includes at least one limiting rib extending in the up and down direction formed on the outer side surface of the adjustment knob, and a limiting groove formed on the inner side surface of the connecting sleeve and adapted to the limiting rib; Alternatively, the limiting structure includes at least one limiting rib extending in the up and down direction formed on the inner side surface of the connecting sleeve, and a limiting groove formed on the outer side surface of the adjustment knob and adapted to the limiting rib.

3. The self-locking adjustment mechanism according to claim 2, wherein The number of the limiting ribs is three, and the three limiting ribs are equally spaced around the axis position of the adjustment knob / connecting sleeve, and the number and arrangement position of the limiting grooves are adapted to the limiting ribs.

4. The self-locking adjustment mechanism according to claim 1, wherein It further includes a mounting bracket, an installation groove is formed on the mounting bracket, the connecting sleeve, the adjustment knob, the locking block and the elastic member are all arranged on the installation groove, and the mounting bracket is connected to the frame.

5. The self-locking adjustment mechanism according to claim 4, wherein The locking structure includes several locking ribs extending in the up and down direction formed on the outer side surface of the locking block, and a plurality of locking grooves formed on the inner side surface of the installation groove and adapted to the locking ribs, and the plurality of locking grooves are arranged in a circular pattern around the axis position of the installation groove; Alternatively, the locking structure includes several locking ribs extending in the up and down direction formed on the inner side surface of the installation groove, and a plurality of locking grooves formed on the outer side surface of the locking block and adapted to the locking ribs, and the plurality of locking grooves are arranged in a circular pattern around the axis position of the locking block.

6. The self-locking adjustment mechanism according to claim 5, wherein One end of the locking groove facing the rotating section is opened to both sides to form a notch.

7. The self-locking adjustment mechanism according to claim 6, wherein, The number of the locking grooves is n, the interval angle between two adjacent locking grooves is α, and the opening angle of the notch is β, and it satisfies:

8. The self-locking adjustment mechanism according to claim 7, wherein, The number of the locking ribs is eight, four of the locking ribs are distributed on one side of the outer side surface of the locking block / the inner side surface of the installation groove, and the other four locking ribs are distributed on the other side of the outer side surface of the locking block / the inner side surface of the installation groove.

9. The self-locking adjustment mechanism according to claim 4, wherein A socket column protruding upward is formed at the bottom of the installation groove, a clearance groove for avoiding the socket column is formed by upward depression on the lower surface of the locking block, the elastic member is a compression spring, the compression spring is sleeved outside the socket column, one end of the compression spring is connected to the bottom of the installation groove, and the other end is connected to the top surface of the clearance groove.

10. A grinding device, comprising a frame, a first grinding disc and a second grinding disc. The first grinding disc and the second grinding disc are stacked vertically on the frame, and the first grinding disc is rotatably connected to the frame in a spiral manner, and the distance between the first grinding disc and the second grinding disc is adjusted as the first grinding disc rotates; characterized in that, The grinding device further includes the self-locking adjustment mechanism according to any one of claims 1-9, the first transmission gear of the self-locking adjustment mechanism is coaxially arranged with the first grinding disc and connected to the first grinding disc for driving the first grinding disc to rotate.

Images