A four-axis reduction gearbox with multiple safety protections and its operation method

Abstract

The present invention discloses a four-side shaft-outlet reduction gearbox with multiple safety protections and an operating method, which relates to the field of precision machinery technology. The reduction gearbox includes a housing and a latch assembly extending from the housing and being telescopically adjustable. The latch assembly includes first, second, third, and fourth transverse latches that are slidably arranged on four sides of the housing. By controlling a first driving gear, the first driving gear is connected to a first transmission assembly, the first transmission assembly is respectively connected to a second transmission assembly and the first transverse latch, the second transmission assembly is respectively connected to a third transmission assembly and the second transverse latch, the third transmission assembly is respectively connected to a fourth transmission assembly and the third transverse latch, and the fourth transmission assembly is connected to the fourth transverse latch, so that the first, second, third, and fourth transverse latches are telescopically extended. This structure is applied to a safe or a safe, so that the cabinet door or the box door can be locked on multiple sides, thereby ensuring the safety of the user's property and data and improving the safety of the safe after it is locked.

Description

Technical Field

[0001] The present invention relates to the field of precision machinery technology, and in particular to a four-axis reduction gearbox with multiple safety protections and an operating method. Background Art

[0002] According to the Chinese utility model patent application number CN93238269.X, "Although various existing safes and cabinets have certain anti-theft properties. However, from the perspective of the locking structure, they all use a one-sided locking method and are equipped with a traditional password lock to lock the doors of the safes and cabinets. The locking strength of this one-sided locking method is not very strong. As criminals' theft techniques improve, the doors of safes and cabinets are often pried open by criminals, and the safety function is lost. Due to the constraints of production costs, ease of use, and beautiful appearance, it is not possible to simply increase the amount of steel used to increase its strength to avoid the risk of criminals prying the door open. Therefore, to improve the anti-theft performance of existing safes and cabinets, it is necessary to find another way and seek a practical solution."

[0003] According to the Chinese utility model patent application number CN201720398471.1, "Currently, most cabinet door locks on the market are two-sided or three-sided interlocking locks. When encountering violent opening, the side without the lock bolt is the weakest. Therefore, as long as the structure of this side is destroyed, the cabinet door can easily be opened."

[0004] According to the Chinese utility model patent application number CN201820365038.2, "The inventor has found through research that the locking method of existing safes, safes, and door products on the market is mostly a single-shaped lock bolt that enters the corresponding bolt slot and is locked in a single direction by the lock bolt and the corresponding bolt slot. This simple method of locking the lock bolt has poor preventive properties. The lock bolt can be removed from the bolt slot by prying in a single direction, which has poor security."

[0005] In summary, the locking structures of existing safes or safes all adopt a single-sided locking method, wherein the locking strength of the cabinet door or box door locked by the single-sided locking method is not very strong. Due to the single-sided locking method, criminals can easily open the safe or safe by simply damaging a single side. In this case, the safe or safe loses its safety function. The present invention proposes a gearbox structure with four-sided shaft output to solve the problem of easy opening of the safe or safe caused by the single-sided locking method, thereby further improving the safety factor of the safe or safe, and effectively ensuring the safety of the user's property or data. Summary of the Invention

[0006] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0007] To achieve the above object, the present invention provides the following technical solutions: a four-side shaft-outlet reduction gearbox with multiple safety protections, comprising a housing and a retractable and adjustable latch assembly extending from the housing;

[0008] The corners of the shell are respectively provided with latch holes that cooperate with the latch assembly;

[0009] The latch assembly includes a first transverse latch, a second transverse latch, a third transverse latch and a fourth transverse latch which are respectively slidably arranged at the corners of the shell.

[0010] A square shaft is rotatably provided on the inner bottom surface of the housing, and a first driving gear is coaxially sleeved on the square shaft and rotates with the square shaft. A first transmission assembly is provided between the first driving gear and the first transverse latch, and a second transmission assembly is provided between the first transverse latch and the second transverse latch, which is in transmission connection with the first transmission assembly. The first gear drives the first transverse latch and the second transverse latch to be telescopically adjusted in the latch hole through the first transmission assembly and the second transmission assembly respectively.

[0011] A third transmission assembly is provided between the second transverse latch and the third transverse latch, wherein the third transmission assembly is in transmission connection with the second transmission assembly, and the third transverse latch is driven to telescope and adjust in the latch hole through the third transmission assembly. A fourth transmission assembly is provided between the third transverse latch and the fourth transverse latch, wherein the fourth transmission assembly is in transmission connection with the third transmission assembly, and the third transverse latch is driven to telescope and adjust in the latch hole through the fourth transmission assembly.

[0012] As a further solution of the present invention: further comprising a lifting and adjusting assembly, the housing comprises a bottom plate;

[0013] The lifting and adjusting assembly includes a motor fixed to the base plate, a threaded rod penetrating the base plate, and a slider sleeved with the square shaft, wherein the square shaft slides up and down in the first driving gear, a first sliding groove is provided on the slider, a T-shaped sliding member is provided in the first sliding groove and slides in the first sliding groove, and an arc-shaped abutting portion is provided at the front end of the sliding member;

[0014] A first spring accommodating cavity and a second spring accommodating cavity are respectively formed between the two sides of the sliding member and the first sliding groove, wherein a first spring and a second spring are respectively arranged in the first spring accommodating cavity and the second spring accommodating cavity, and two ends of the first spring and the second spring are elastically abutted against two ends of the first spring accommodating cavity and the second spring accommodating cavity in the longitudinal direction, respectively. An end of the sliding member away from the arc-shaped abutting portion passes through the first sliding groove and extends along the longitudinal direction of the sliding member;

[0015] A limiting groove is provided at the lower end of the square shaft along the inner concave ring of the inner wall of the square shaft, wherein the sliding member is engaged with the limiting groove under the influence of the elastic force of the first spring and the second spring;

[0016] The slider is provided with a threaded hole, through which the slider is threadedly engaged with the threaded rod; the output shaft of the motor is arranged through the bottom plate; and the threaded rod is fixed with a rotating gear for driving the threaded rod to rotate;

[0017] Wherein, a second driving gear is coaxially fixed on the output shaft of the motor and meshes with the rotating gear for transmission;

[0018] A first through hole is opened on the bottom plate, wherein a threaded rod is arranged in the first through hole, and a bearing is arranged between the threaded rod and the first through hole, wherein the inner wall of the bearing is fixedly connected to the threaded rod, and the outer wall of the bearing is fixedly connected to the inner wall of the first through hole.

[0019] As a further solution of the present invention: the first transmission assembly includes a first multi-layer gear and a first driven gear;

[0020] The first driven gear is meshed with the first driving gear for transmission;

[0021] The first multi-layer gear includes a coaxially arranged primary transmission layer and a secondary transmission layer, wherein the first driven gear is meshed with the secondary transmission layer of the first multi-layer gear for transmission, and the first transverse pin is meshed with the primary transmission layer of the first multi-layer gear for transmission.

[0022] As a further solution of the present invention: the second transmission assembly includes a second driven gear and a second multi-layer gear having the same structure as the first multi-layer gear;

[0023] The second driven gear is meshed with the secondary transmission layer of the second multi-layer gear, and the second driven gear is meshed with the first driven gear for transmission;

[0024] The primary transmission layer of the second multi-layer gear meshes with the second transverse latch for transmission.

[0025] As a further solution of the present invention: the third transmission assembly includes a third driven gear, a fourth driven gear and a third multi-layer gear having the same structure as the first multi-layer gear;

[0026] The third driven gear is engaged with the secondary transmission layer of the second multi-layer gear for transmission, the fourth driven gear is engaged with the third driven gear, the fourth driven gear is engaged with the secondary transmission layer of the third multi-layer gear for transmission, and the primary transmission layer of the third multi-layer gear is engaged with the third transverse pin for transmission.

[0027] As a further solution of the present invention: the fourth transmission assembly includes a fifth driven gear, a sixth driven gear and a fourth multi-layer gear having the same structure as the first multi-layer gear;

[0028] The fifth driven gear is engaged with the secondary transmission layer of the third multi-layer gear for transmission, the fifth driven gear is engaged with the sixth driven gear, the sixth transmission gear is engaged with the secondary transmission layer of the fourth multi-layer gear for transmission, and the primary transmission layer of the fourth multi-layer gear is engaged with the fourth horizontal pin for transmission.

[0029] As a further embodiment of the present invention, the latch assembly further comprises a first longitudinal latch and a second longitudinal latch respectively slidably disposed in the housing;

[0030] The first multi-layer gear and the second multi-layer gear each include three transmission layers;

[0031] Among them, a seventh driven gear is provided between the third transmission layer of the first multi-layer gear and the first longitudinal pin, and the seventh driven gear is respectively engaged with the third transmission layer of the first multi-layer gear and the first longitudinal pin;

[0032] Among them, an eighth driven gear is provided between the third transmission layer of the second multi-layer gear and the second longitudinal pin, and the eighth driven gear is respectively engaged with the third transmission layer of the second multi-layer gear and the second longitudinal pin.

[0033] As a further solution of the present invention: the secondary transmission layer is formed on the periphery of the primary transmission layer, the tertiary transmission layer is formed on the periphery of the primary transmission layer, an annular abutment is fixedly provided on the first driving gear, and the annular abutment is arranged along the periphery of the outer wall of the square shaft, wherein an abutment groove is provided on the outer wall of the annular abutment, and a damping groove connected to the outer wall of the annular abutment is formed in the shell, wherein a third spring is provided in the damping groove, and one end of the third spring close to the annular abutment is provided with a bump bead abutting against the outer wall of the annular abutment, and the other end of the third spring is provided with a rotating part, a first thread is provided on the outer wall of the rotating part, and a second thread screwed together with the first thread is provided on the inner wall of the damping groove.

[0034] As a further solution of the present invention: the square shaft is arranged to pass through the shell, and a knob is provided at the top of the square shaft, wherein a fourth spring is provided between the knob and the shell, and the fourth spring contracts evenly from one end close to the shell to one end close to the knob.

[0035] A method for operating a four-axis reduction gearbox with multiple safety protections, wherein the reduction gearbox has a locked state and an unlocked state;

[0036] In the locked state, the unlocking steps include the following:

[0037] Locking step 1: Authentication by fingerprint or face recognition;

[0038] Locking step 2: After authentication is passed, the motor rotates to raise the square shaft and the knob together;

[0039] Locking step three: After the square shaft and knob are raised, rotate the knob forward to make the knob drive the square shaft to rotate;

[0040] Locking step 4: rotating the knob causes the square shaft to rotate, and the square shaft drives the first transmission assembly;

[0041] Locking step five, the first transmission assembly drives the second transmission assembly;

[0042] Locking step six, the second transmission assembly drives the third transmission assembly;

[0043] Locking step seven, the third transmission assembly drives the fourth transmission assembly;

[0044] In steps 4, 5, 6, and 7, the first transverse latch, the second transverse latch, the third transverse latch, the fourth transverse latch, the first longitudinal latch, and the second longitudinal latch will be retracted synchronously, so that the present invention changes from a locked state to an unlocked state;

[0045] In the unlocked state, the locking steps include the following:

[0046] Unlocking step 1: Rotate the knob in the opposite direction to rotate the square shaft;

[0047] Unlocking step 2: After the knob is rotated to the target position, the square shaft drives the first transmission assembly;

[0048] Unlocking step three: the first transmission assembly drives the second transmission assembly;

[0049] Unlocking step 4: the second transmission assembly drives the third transmission assembly;

[0050] Unlocking step five: the third transmission assembly drives the fourth transmission assembly;

[0051] In steps 2, 3, 4, and 5, the first transverse latch, the second transverse latch, the third transverse latch, the fourth transverse latch, the first longitudinal latch, and the second longitudinal latch are synchronously extended, causing the present invention to change from an unlocked state to a locked state;

[0052] Among them, the first horizontal latch, the second horizontal latch, the third horizontal latch, the fourth horizontal latch, the first longitudinal latch and the second longitudinal latch will be synchronously extended to the target position, and the square shaft and the knob will drop to the specified position together.

[0053] Compared with the prior art, the present invention has the following beneficial effects: the first driving gear is controlled by rotating the square shaft, the first driving gear is connected to the first transmission assembly, the first transmission assembly is connected to the second transmission assembly and the first transverse latch respectively, the second transmission assembly is connected to the third transmission assembly and the second transverse latch respectively, the third transmission assembly is connected to the fourth transmission assembly and the third transverse latch respectively, and the fourth transmission assembly is connected to the fourth transverse latch, so that the square shaft can control the extension and retraction of the first transverse latch, the second transverse latch, the third transverse latch and the fourth transverse latch while rotating. This structure is used in a safe or a safe, so that the cabinet door or the box door can be locked on multiple sides, ensuring the safety of the user's property and data, and improving the safety of the safe after locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural stereogram of the present invention;

[0055] Figure 2 It is another structural stereogram of the present invention;

[0056] Figure 3 yes Figure 2 Sectional view along AA direction;

[0057] Figure 4 yes Figure 3 Partial view at point B in the middle;

[0058] Figure 5 It is a three-dimensional diagram of the internal structure of the present invention;

[0059] Figure 6 is another internal structure perspective view of the present invention;

[0060] Figure 7 It is another internal structure stereogram of the present invention;

[0061] Figure 8 yes Figure 7 Partial view at point C in the middle;

[0062] Figure 9 It is a top view of the internal structure of the present invention;

[0063] Figure 10 It is a bottom view of the internal structure of the present invention;

[0064] Figure 11 yes Figure 10 Partial view at point D in the middle;

[0065] Figure 12 It is a schematic diagram of the multi-layer gear structure of the present invention;

[0066] The reference numerals and names in the figures are as follows:

[0067] Housing-0, base plate-10, latch assembly-100;

[0068] Damping groove 01, third spring 02, contact ball 03, rotating part 04, first thread 05, second thread 06, limiter 07, induction part 08;

[0069] First transverse latch-1;

[0070] First transmission assembly-11, first multi-layer gear-12, first driven gear-13;

[0071] Second horizontal latch-2;

[0072] Second transmission assembly-21, second multi-layer gear-22, second driven gear-23;

[0073] Third transverse latch-3;

[0074] Third transmission assembly-31, third multi-layer gear-32, third driven gear-33, fourth driven gear-34;

[0075] Fourth transverse latch-4;

[0076] Fourth transmission assembly-41, fourth multi-layer gear-42, fifth driven gear-43, sixth driven gear-44;

[0077] First longitudinal latch-101, seventh driven gear-102;

[0078] Second longitudinal latch-201, eighth driven gear-202;

[0079] Square shaft-5, limiting slot-51, knob-52, fourth spring-53;

[0080] First driving gear-6, annular abutment member-61, abutment groove-62;

[0081] Threaded rod-7, motor-71, rotating gear-72, bearing-73;

[0082] Slider-8, sliding member-82, arc-shaped abutment portion-83;

[0083] First spring accommodating cavity-821, first spring-8211;

[0084] Second spring accommodating chamber-822, second spring-8221;

[0085] The second driving gear-9, the first transmission layer-91, the second transmission layer-92, the third transmission layer-93. DETAILED DESCRIPTION

[0086] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0087] See also Figure 1-12 A four-side shaft reduction gearbox with multiple safety protections includes a housing 0 and a retractable latch assembly 100 extending from the housing 0;

[0088] The corners of the housing 0 are respectively provided with latch holes that cooperate with the latch assembly 100;

[0089] The latch assembly 100 includes a first transverse latch 1, a second transverse latch 2, a third transverse latch 3, and a fourth transverse latch 4, which are slidably disposed at the corners of the housing 0.

[0090] A square shaft 5 is rotatably provided on the inner bottom surface of the housing 0. The square shaft 5 is coaxially sleeved with a first driving gear 6 that rotates with the square shaft 5. A first transmission assembly 11 is provided between the first driving gear 6 and the first transverse latch 1. A second transmission assembly 21, which is transmission-connected to the first transmission assembly 11, is provided between the first transverse latch 1 and the second transverse latch 2. The first gear drives the first transverse latch 1 and the second transverse latch 2 to telescope and adjust in the latch hole through the first transmission assembly 11 and the second transmission assembly 21 respectively.

[0091] A third transmission assembly 31 is provided between the second transverse latch pin 2 and the third transverse latch pin 3, wherein the third transmission assembly 31 is in transmission connection with the second transmission assembly 21, and the third transverse latch pin 3 is driven to telescope and adjust within the latch hole via the third transmission assembly 31. A fourth transmission assembly 41 is provided between the third transverse latch pin 3 and the fourth transverse latch pin 4, wherein the fourth transmission assembly 41 is in transmission connection with the third transmission assembly 31, and the third transverse latch pin 3 drives the fourth transverse latch pin 4 to telescope and adjust within the latch hole via the fourth transmission assembly 41.

[0092] During the implementation process, the square shaft 5 is rotated, and the rotation of the square shaft 5 drives the first driving gear 6 coaxial with the square shaft 5, wherein the first driving gear 6 rotates along with the rotation of the square shaft 5, and the rotation of the first driving gear 6 drives the first transmission component 11, and the first transmission component 11 enters the working state, driving the first horizontal latch 1 to extend and retract. While the first horizontal latch 1 is extending and retracting, a second transmission component 21 connected to the first transmission component 11 is provided between the second horizontal latch 2 and the first horizontal latch 1. When the first transmission component 11 is working, it will also cause the second transmission component 21 to enter the working state. The second transmission component 21 Will drive the second transverse latch 2 to extend and retract in the housing 0, wherein a third transmission assembly 31 is provided between the second transverse latch 2 and the third transverse latch 3, and the third transmission assembly 31 is transmission-connected with the second window hole assembly. While the second transmission assembly 21 causes the second transverse latch 2 to extend and retract, the second transmission assembly 21 will drive the third transmission assembly 31, and the third transmission assembly 31 causes the third transverse latch 3 to extend and retract in the housing 0. While the third transmission assembly 31 is transmitting, the fourth transmission assembly 41 is transmission-connected with the third transmission assembly 31, and the fourth transmission assembly 41 will receive the transmission of the third transmission assembly 31. , the fourth transmission component 41 enters the working state as the third transmission component 31 enters the working state, and the fourth transmission component 41 causes the fourth horizontal latch 4 to retract and extend in the housing 0, wherein the first horizontal latch 1, the second horizontal latch 2, the third horizontal latch 3 and the fourth horizontal latch 4 are in the locked state when they are extended, and in the unlocked state when they are retracted into the housing 0, then the first horizontal latch 1, the second horizontal latch 2, the third horizontal latch 3 and the fourth horizontal latch 4 will enter the locked or unlocked state according to the different rotation directions of the square shaft 5, and the first driving gear 6 is controlled by the rotation of the square shaft 5, and the first driving gear 6 and the first transmission component 11 transmission connection, the first transmission assembly 11 is transmission connected with the second transmission assembly 21 and the first horizontal latch 1, the second transmission assembly 21 is transmission connected with the third transmission assembly 31 and the second horizontal latch 2, the third transmission assembly 31 is transmission connected with the fourth transmission assembly 41 and the third horizontal latch 3, and the fourth transmission assembly 41 is transmission connected with the fourth horizontal latch 4, so that the square shaft 5 can simultaneously control the first horizontal latch 1, the second horizontal latch 2, the third horizontal latch 3 and the fourth horizontal latch 4 when rotating. This structure is applied to a safe or a safe cabinet to lock multiple sides of its cabinet door or box door.

[0093] In one embodiment of the present invention, the above structure can be combined with different locking structures of a safe or a safe to further lock the safe or the safe, which can better ensure the safety of the user's property and data. For example, lock tongues are respectively fixed to the ends of the first horizontal latch 1, the second horizontal latch 2, the third horizontal latch 3 and the fourth horizontal latch 4, and then the first horizontal latch 1, the second horizontal latch 2, the third horizontal latch 3 and the fourth horizontal latch 4 are telescopically arranged in the shell 0, so as to control the lock tongue to lock or unlock the cabinet door or the box door, etc., which can better lock the safe or the safe, further ensure the safety of the user's property and data, and improve the safety of the safe after it is locked.

[0094] In the embodiment of the present invention, a lifting and adjusting assembly is also included. The housing 0 includes a bottom plate 10;

[0095] The lifting and adjusting assembly includes a motor 71 fixed to the base plate 10, a threaded rod 7 penetrating the base plate 10, and a slider 8 sleeved with the square shaft 5, wherein the square shaft 5 slides up and down in the first driving gear 6, and the slider 8 is provided with a first slide groove, in which a T-shaped sliding member 82 is provided and slides in the first slide groove, and the front end of the sliding member 82 is provided with an arc-shaped abutment portion 83;

[0096] A first spring accommodating cavity 821 and a second spring accommodating cavity 822 are respectively formed between the two sides of the sliding member 82 and the first sliding groove, wherein a first spring 8211 and a second spring 8221 are respectively disposed in the first spring accommodating cavity 821 and the second spring accommodating cavity 822. The two ends of the first spring 8211 and the second spring 8221 elastically abut against the two ends of the first spring accommodating cavity 821 and the second spring accommodating cavity 822 in the longitudinal direction, respectively. The end of the sliding member 82 away from the arc-shaped abutting portion 83 passes through the first sliding groove and extends along the longitudinal direction of the sliding member 82.

[0097] The lower end of the square shaft 5 is provided with a limiting groove 51 along the inner wall of the square shaft 5, wherein the sliding member 82 is engaged with the limiting groove 51 under the influence of the elastic force of the first spring 8211 and the second spring 8221;

[0098] The slider 8 is provided with a threaded hole, through which the slider 8 is screwed to the threaded rod 7. The output shaft of the motor 71 is provided through the bottom plate 10. The threaded rod 7 is fixed with a rotating gear 72 for driving the threaded rod 7 to rotate.

[0099] The output shaft of the motor 71 is coaxially fixed with a second driving gear 9 that meshes with the rotating gear 72 for transmission;

[0100] A first through hole is provided on the base plate 10 , wherein the threaded rod 7 is provided in the first through hole, and a bearing 73 is provided between the threaded rod 7 and the first through hole, wherein the inner wall of the bearing 73 is fixedly connected to the threaded rod 7 , and the outer wall of the bearing 73 is fixedly connected to the inner wall of the first through hole.

[0101] The two ends of the first spring 8211 and the second spring 8221 are elastically abutted against the two ends of the first spring accommodating cavity 821 and the second spring accommodating cavity 822 in the length direction, respectively. This means that the two ends of the first spring 8211 are elastically abutted against the two ends of the first spring 8211, and the two ends of the second spring 8221 are elastically abutted against the two ends of the second spring accommodating cavity 822.

[0102] One end of the first spring 8211 and the second spring 8221 respectively abut against the bottom surface of the first spring accommodating cavity 821 and the second spring accommodating cavity 822, and the other end of the first spring 8211 and the second spring 8221 respectively abut against the sliding member 82, so that the sliding member 82 is engaged with the limiting groove 51.

[0103] When the first transverse latch 1, the second transverse latch 2, the third transverse latch 3, and the fourth transverse latch 4 of the present invention are extended, the lock is in a locked state. When used with a safe or a cabinet, the square shaft 5 in the locked state is usually embedded in the door of the box or cabinet;

[0104] During the implementation process, the motor 71 will be electrically connected to the fingerprint or face recognition components, wherein the motor 71 will enter the working state after the fingerprint or face recognition is passed;

[0105] During use, the person opening the box door or cabinet door must first be verified through elements such as fingerprints or face recognition connected to the motor 71. When the verification is passed, the output shaft of the motor 71 starts working, wherein the output shaft of the motor 71 is coaxially fixed with a second driving gear 9, and the second driving gear 9 is meshed with the rotating gear 72 for transmission, wherein the rotating gear 72 is fixed to the threaded rod 7, and the rotation of the rotating gear 72 drives the threaded rod 7 to rotate. The threaded rod 7 is arranged in the first through hole, and a bearing 73 is provided between the threaded rod 7 and the first through hole, so that when the threaded rod 7 rotates with the rotating gear 72, the threaded rod 7 will not be displaced up or down while it is rotating. When the threaded rod 7 rotates, the slider 8 is connected to the threaded rod 7 through the threaded hole. The rod 7 is threadedly engaged. When the threaded rod 7 rotates in place, the slider 8 moves up or down by being threaded with the threaded rod 7. The slider 8 is sleeved with the square shaft 5, and the slider 8 is provided with a sliding member 82 that slides on the slider 8. The sliding member 82 slides in the first sliding groove, so that the arc-shaped abutting portion 83 on the slider 82 is engaged with the limiting groove 51 at the lower end of the square shaft 5. The square shaft 5 is located at the axial center position of the first driving gear 6 and slides up and down in the first driving gear 6. The engagement of the sliding member 82 with the limiting groove 51 of the square shaft 5 can make the square shaft 5 slide up and down with the up and down movement of the slider 8. This structure is in a locked state when the present invention is in a lower shaft 5 inside a box door or cabinet door, which can increase confidentiality and greatly improve security capabilities.

[0106] In one embodiment of the present invention, the existing safes or safes are equipped with a power failure emergency device, which is mechanically connected to the sliding member 82. When the safe or safe is urgently needed to be opened, but there is a power failure, the motor 71 cannot work and the square shaft 5 cannot be raised. The sliding member 82 can be moved by the power failure emergency device so that the square shaft 5 is not limited by the sliding member 82, and then the square shaft 5 is forcibly pulled up and rotated, so that the first driving gear 6 can be rotated to unlock it.

[0107] In the embodiment of the present invention, the first transmission assembly 11 includes a first multi-layer gear 12 and a first driven gear 13;

[0108] The first driven gear 13 is meshed with the first driving gear 6 for transmission;

[0109] The first multi-layer gear 12 includes a coaxially arranged primary transmission layer 91 and a secondary transmission layer 92 , wherein the first driven gear 13 is meshed with the secondary transmission layer 92 of the first multi-layer gear 12 for transmission, and the first transverse latch 1 is meshed with the primary transmission layer 91 of the first multi-layer gear 12 for transmission.

[0110] When the first driving gear 6 rotates, the working process of the first transmission assembly 11 is as follows;

[0111] The first driving gear 6 is meshed with the first driven gear 13 for transmission, wherein the first driven gear 13 is meshed with the secondary transmission layer 92 of the first multi-layer gear 12. When the first driven gear 13 rotates following the first driving gear 6, it also drives the first multi-layer gear 12 to rotate, wherein the primary transmission layer 91 of the first multi-layer gear 12 is meshed with the first transverse latch 1 for transmission;

[0112] The above structure is further described as follows: the first driving gear 6 drives the first driven gear 13, the first driven gear 13 drives the first multi-layer gear 12, and the first multi-layer gear 12 finally drives the first transverse latch 1, so that the first transverse latch 1 can extend out of the shell 0 or retract into the shell 0.

[0113] In the embodiment of the present invention, the second transmission assembly 21 includes a second driven gear 23 and a second multi-layer gear 22 having the same structure as the first multi-layer gear 12;

[0114] The second driven gear 23 is meshed with the secondary transmission layer 92 of the second multi-layer gear 22, and the second driven gear 23 is meshed with the first driven gear 13 for transmission;

[0115] The primary transmission layer 91 of the second multi-layer gear 22 is meshed with the second transverse latch 2 for transmission.

[0116] When the first driving gear 6 drives the first driven gear 13, it meshes with the first driven gear 13 through the second driven gear 23. When the first driving gear 6 rotates and drives the first driven gear 13, the first driven gear 13 rotates and drives the second driven gear 23 meshed with it. The second driven gear 23 meshes with the secondary transmission layer 92 of the second multi-layer gear 22, causing the second multi-layer gear 22 to rotate. The second multi-layer gear 22 meshes with the second transverse latch 2, and the second multi-layer gear 22 drives the second transverse latch 2 to extend out of the housing 0 or retract into the housing 0.

[0117] The above structure is further described as follows: the first driven gear 13 drives the second driven gear 23, and the second driven gear 23 drives the secondary transmission layer 92 of the second multi-layer gear 22, so that the second multi-layer gear 22 rotates. The primary transmission layer 91 of the second multi-layer gear 22 engages and transmits with the second transverse pin 2, so that the second transverse pin 2 can extend out of the shell 0 or retract into the shell 0.

[0118] In the embodiment of the present invention, the third transmission assembly 31 includes a third driven gear 33, a fourth driven gear 34, and a third multi-layer gear 32 having the same structure as the first multi-layer gear 12;

[0119] The third driven gear 33 is meshed with the secondary transmission layer 92 of the second multi-layer gear 22 for transmission, the fourth driven gear 34 is meshed with the third driven gear 33, the fourth driven gear 34 is meshed with the secondary transmission layer 92 of the third multi-layer gear 32 for transmission, and the primary transmission layer 91 of the third multi-layer gear 32 is meshed with the third horizontal pin 3 for transmission.

[0120] When the second multi-layer gear 22 drives the second transverse latch 2 to rotate, the third driven gear 33 is meshed with the secondary transmission layer 92 of the second multi-layer gear 22, so that the third driven gear 33 rotates along with the rotation of the second multi-layer gear 22. The third driven gear 33 is meshed with the fourth driven gear 34, and the fourth driven gear 34 rotates along with the rotation of the third driven gear 33. The fourth driven gear 34 is meshed with the secondary transmission layer 92 of the third multi-layer gear 32, so that the third multi-layer gear 32 rotates along with the rotation of the fourth driven gear 34. Among them, the primary transmission layer 91 of the third multi-layer gear 32 is meshed with the third transverse latch 3. When the third multi-layer gear 32 rotates, it can drive the third transverse latch 3 to extend out of or retract into the housing 0;

[0121] The above structure is further described as follows: the second multi-layer gear 22 rotates to drive the third driven gear 33 and the fourth driven gear 34 meshing with the third driven gear 33, wherein the third multi-layer gear 32 is meshed with the fourth driven gear 34, and the third multi-layer gear 32 rotates, wherein the third multi-layer gear 32 is meshed with the third horizontal pin 3, and the third multi-layer gear 32 rotates while being able to control the third horizontal pin 3 to extend out of the shell 0 or retract into the shell 0.

[0122] In the embodiment of the present invention, the fourth transmission assembly 41 includes a fifth driven gear 43, a sixth driven gear 44, and a fourth multi-layer gear 42 having the same structure as the first multi-layer gear 12;

[0123] The fifth driven gear 43 is engaged with the secondary transmission layer 92 of the third multi-layer gear 32 for transmission, the fifth driven gear 43 is engaged with the sixth driven gear 44, the sixth transmission gear is engaged with the secondary transmission layer 92 of the fourth multi-layer gear 42 for transmission, and the primary transmission layer 91 of the fourth multi-layer gear 42 is engaged with the fourth horizontal pin 4 for transmission.

[0124] When the third multi-layer gear 32 drives the third transverse latch 3 to rotate, the fifth driven gear 43 meshes with the third multi-layer gear 32, causing the fifth driven gear 43 to rotate along with the rotation of the third multi-layer gear 32. The fifth driven gear 43 meshes with the sixth driven gear 44 for transmission, and the sixth driven gear 44 meshes with the secondary transmission layer 92 of the fourth multi-layer gear 42 for transmission, causing the fourth multi-layer gear 42 to rotate. At the same time, the primary transmission layer 91 of the fourth multi-layer gear 42 meshes with the fourth transverse latch 4, allowing the fourth transverse latch 4 to extend out of the housing 0 or retract into the housing 0 according to the rotation direction of the fourth multi-layer gear 42.

[0125] The above structure is further described as follows: the third multi-layer gear 32 rotates to drive the fifth driven gear 43 and the sixth driven gear 44 engaged with the fifth driven gear 43, wherein the fourth multi-layer gear 42 is engaged with the sixth driven gear 44, and the fourth multi-layer gear 42 rotates as the sixth driven gear 44 rotates. The fourth horizontal pin 4 is engaged with the primary transmission layer 91 of the fourth multi-layer gear 42, and the direction of rotation of the fourth multi-layer gear 42 can control the fourth horizontal pin 4 to extend or retract into the shell 0.

[0126] And according to the Chinese utility model patent with application number CN201821841623.1, "a safe is a device used to protect people's property safety and is widely used in the prior art. The safe mainly includes a box body and a hinged box door. A lock bolt is provided on the box door, and the box door is locked by the lock bolt. A knob 52 is provided on the outside of the box door. The rotation of the knob 52 drives the lock bolt to retract and retract to control the opening and closing of the door. There are many linkage devices on the box door, including a knob 52, a disc assembly, an upper connecting plate, a lower connecting plate and a mechanism plate. One end of the lock bolt is directly fixed on the mechanism plate, and the mechanism plate drives the lock bolt to move back and forth in the horizontal direction. The lock bolt only moves horizontally on the box door and has no displacement in other directions."

[0127] In the embodiment of the present invention, the latch assembly 100 further includes a first longitudinal latch 101 and a second longitudinal latch 201 slidably disposed in the housing 0;

[0128] The first multi-layer gear 12 and the second multi-layer gear 22 each include a three-stage transmission layer 93;

[0129] A seventh driven gear 102 is provided between the third transmission layer 93 of the first multi-layer gear 12 and the first longitudinal latch 101. The seventh driven gear 102 is engaged with the third transmission layer 93 of the first multi-layer gear 12 and the first longitudinal latch 101 respectively.

[0130] An eighth driven gear 202 is provided between the third transmission layer 93 of the second multi-layer gear 22 and the second longitudinal pin 201 , and the eighth driven gear 202 is meshed with the third transmission layer 93 of the second multi-layer gear 22 and the second longitudinal pin 201 respectively.

[0131] The first multi-layer gear 12 also includes a three-stage transmission layer 93, wherein a seventh driven gear 102 is provided between the third-stage transmission layer 93 of the first multi-layer gear 12 and the first longitudinal latch 101. During implementation, while the first driven gear 13 rotates with the first driving gear 6, the first multi-layer gear 12 meshes with the first driven gear 13 through the secondary transmission layer 92 of the first multi-layer gear 12, causing the first multi-layer gear 12 to rotate, wherein the seventh driven gear 102 meshes with the third-stage transmission layer 93 of the first multi-layer gear 12, so that while the first multi-layer gear 12 rotates, it can also drive the seventh driven gear 102 to rotate, wherein the seventh driven gear 102 meshes with the first longitudinal latch 101, and when the seventh driven gear 102 rotates, it can cause the first longitudinal latch 101 to extend out of or retract into the housing 0;

[0132] The second multi-layer gear 22 also includes a three-stage transmission layer 93, wherein an eighth driven gear 202 is provided between the third-stage transmission layer 93 of the second multi-layer gear 22 and the second longitudinal latch 201. During implementation, while the second driven gear 23 rotates with the first driven gear 13, the second multi-layer gear 22 meshes with the second driven gear 23 through the secondary transmission layer 92 of the second multi-layer gear 22, causing the second multi-layer gear 22 to rotate. The eighth driven gear 202 meshes with the third-stage transmission layer 93 of the second multi-layer gear 22, causing the second multi-layer gear 22 to rotate while also driving the eighth driven gear 202 to rotate. The eighth driven gear 202 meshes with the second longitudinal latch 201. When the eighth driven gear 202 rotates, the second longitudinal latch 201 can be extended from or retracted into the housing 0.

[0133] The above-mentioned first longitudinal latch 101 and the second longitudinal latch 201 are provided, wherein the first transverse latch 1, the second transverse latch 2, the third transverse latch 3, the fourth transverse latch 4, the first longitudinal latch 101 and the second longitudinal latch 201 enable the present invention to lock multiple latches in a coordinated and synchronous manner, and the first longitudinal latch 101 and the second longitudinal latch 201 are provided with a longitudinal locking function, further improving the security capability.

[0134] In the embodiment of the present invention, the secondary transmission layer 92 is formed on the periphery of the primary transmission layer 91 .

[0135] Since the secondary transmission layer 92 is formed on the periphery of the primary transmission layer 91, the gear pitch circle diameters on the secondary transmission layer 92 and the primary transmission layer 91 are different. In the transmission process of the gears, according to the concept of gear transmission ratio, the transmission ratio is equal to the inverse of the ratio of the pitch circle diameters. By controlling the size of the gear pitch circle diameters on the secondary transmission layer 92 and the primary transmission layer 91, the effect of different transmission ratio outputs can be achieved through multiple layers of gears, making the gear transmission of the present invention more flexible, with higher space utilization and a more compact structure.

[0136] In the embodiment of the present invention, the tertiary transmission layer 93 is formed on the periphery of the primary transmission layer 91 .

[0137] In the embodiment of the present invention, an annular abutment 61 is fixedly provided on the first driving gear 6, and the annular abutment 61 is arranged along the outer wall periphery of the square shaft 5, wherein an abutment groove 62 is provided on the outer wall of the annular abutment 61, and a damping groove 01 connected with the outer wall of the annular abutment 61 is formed in the shell 0, wherein a third spring 02 is provided in the damping groove 01, and one end of the third spring 02 close to the annular abutment 61 is provided with a bump bead 03 abutting with the outer wall of the annular abutment 61, and the other end of the third spring 02 is provided with a rotating member 04, and a first thread 05 is provided on the outer wall of the rotating member 04, and a second thread 06 threadedly engaged with the first thread 05 is provided on the inner wall of the damping groove 01.

[0138] When the square shaft 5 is rotated, since the annular abutment 61 is fixedly connected to the first driving gear 6, when the square shaft 5 rotates and drives the first driving gear 6 to rotate, the annular abutment 61 also rotates, wherein the bumping ball 03 abuts against the outer wall of the annular abutment 61. Since the bumping ball 03 is subjected to the force of the third spring 02, the abutting force between the bumping ball 03 and the outer wall of the annular abutment 61 is increased, and the user can feel a damping feeling when rotating the square shaft 5, and the hand feeling is better when rotating the square shaft 5. An abutting groove 62 is provided on the outer wall of the annular abutment 61. When the square shaft 5 is rotated until the first horizontal latch 1 is fully extended out of the shell 0, the bumping ball 03 will fully contact the abutting groove 62, so that the bumping ball 03 is located in the abutting groove 62. This structure can make a clicking sound after the square shaft 5 is rotated and locked to remind the user that the locking is completed;

[0139] Among them, the abutment force between the bump ball 03 and the annular abutment member 61 can be adjusted by rotating the rotating member 04 so that the first thread 05 of the rotating member 04 is screwed into the second thread 06 of the abutment groove 62, so that the rotating member 04 slides in the abutment groove 62 to adjust the compression state of the third spring 02.

[0140] In an embodiment of the present invention, the square shaft 5 is arranged to pass through the shell 0, and a knob 52 is provided at the top of the square shaft 5, wherein a fourth spring 53 is provided between the knob 52 and the shell 0, and the fourth spring 53 contracts evenly from one end close to the shell 0 to the end close to the knob 52.

[0141] The square shaft 5 and the knob 52 in the locked state are usually embedded in the door of a box or cabinet. After the fingerprint or face recognition is passed, the motor 71 drives the slider 8 to make the square shaft 5 and the knob 52 rise together. The knob 52 can enable the user to better control the rotation of the first driving gear 6 after the square shaft 5 is raised.

[0142] The fourth spring 53 can further enhance the damping feeling of the knob 52 when it is rotated, thereby improving the feel when using the knob 52.

[0143] In one embodiment of the present invention, a limiting member 07 and a sensing member 08 that abuts against the limiting member 07 are fixed on any of the first transverse latch 1, the second transverse latch 2, the third transverse latch 3, the fourth transverse latch 4, the first longitudinal latch 101 and the second longitudinal latch 201. For example, the limiting member 07 is fixed on the first transverse latch 1, wherein the sensing member 08 is provided at the end point of the first transverse latch 1 extending from the shell 0. After the first transverse latch 1 is fully extended, the limiting member 07 abuts against the sensing member 08. After the sensing member 08 abuts against the limiting member 07, the sensing member 08 will issue a command to rotate the motor 71, so that the motor 71 drives the square shaft 5 to descend to the locked state.

[0144] A method for operating a four-axis reduction gearbox with multiple safety protections, wherein the reduction gearbox has a locked state and an unlocked state;

[0145] In the locked state, the unlocking steps include the following:

[0146] Locking step 1: Authentication by fingerprint or face recognition;

[0147] Locking step 2: After authentication is passed, the motor rotates to raise the square shaft and the knob together;

[0148] Locking step three: After the square shaft and knob are raised, rotate the knob forward to make the knob drive the square shaft to rotate;

[0149] Locking step 4: rotating the knob causes the square shaft to rotate, and the square shaft drives the first transmission assembly;

[0150] Locking step five, the first transmission assembly drives the second transmission assembly;

[0151] Locking step six, the second transmission assembly drives the third transmission assembly;

[0152] Locking step seven, the third transmission assembly drives the fourth transmission assembly;

[0153] In steps 4, 5, 6, and 7, the first transverse latch, the second transverse latch, the third transverse latch, the fourth transverse latch, the first longitudinal latch, and the second longitudinal latch will be retracted synchronously, so that the present invention changes from a locked state to an unlocked state;

[0154] In the unlocked state, the locking steps include the following:

[0155] Unlocking step 1: Rotate the knob in the opposite direction to rotate the square shaft;

[0156] Unlocking step 2: After the knob is rotated to the target position, the square shaft drives the first transmission assembly;

[0157] Unlocking step three: the first transmission assembly drives the second transmission assembly;

[0158] Unlocking step 4: the second transmission assembly drives the third transmission assembly;

[0159] Unlocking step five: the third transmission assembly drives the fourth transmission assembly;

[0160] In steps 2, 3, 4, and 5, the first transverse latch, the second transverse latch, the third transverse latch, the fourth transverse latch, the first longitudinal latch, and the second longitudinal latch are synchronously extended, causing the present invention to change from an unlocked state to a locked state;

[0161] Among them, the first horizontal latch, the second horizontal latch, the third horizontal latch, the fourth horizontal latch, the first longitudinal latch and the second longitudinal latch will be synchronously extended to the target position, and the square shaft and the knob will drop to the specified position together.

[0162] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A four-axis reduction gearbox with multiple safety protections, characterized in that: The utility model comprises a housing and a latch assembly extending from the housing and being telescopically adjustable; The corners of the shell are respectively provided with latch holes that cooperate with the latch assembly; The latch assembly includes a first transverse latch, a second transverse latch, a third transverse latch and a fourth transverse latch which are respectively slidably arranged at the corners of the shell. A square shaft is rotatably provided on the inner bottom surface of the housing, and a first driving gear is coaxially sleeved on the square shaft and rotates with the square shaft. A first transmission assembly is provided between the first driving gear and the first transverse latch, and a second transmission assembly is provided between the first transverse latch and the second transverse latch, which is in transmission connection with the first transmission assembly. The first gear drives the first transverse latch and the second transverse latch to be telescopically adjusted in the latch hole through the first transmission assembly and the second transmission assembly respectively. A third transmission assembly is provided between the second transverse latch pin and the third transverse latch pin, wherein the third transmission assembly is in transmission connection with the second transmission assembly, and the third transverse latch pin is driven to be telescopically adjusted within the latch pin hole by the third transmission assembly; a fourth transmission assembly is provided between the third transverse latch pin and the fourth transverse latch pin, wherein the fourth transmission assembly is in transmission connection with the third transmission assembly, and the third transverse latch pin is driven to be telescopically adjusted within the latch pin hole by the fourth transmission assembly; The lifting and adjusting assembly is also included. The housing includes a bottom plate. The lifting and adjusting assembly includes a motor fixed to the bottom plate, a threaded rod extending through the bottom plate, and a slider sleeved with the square shaft. The square shaft slides up and down in the first driving gear. The slider is provided with a first slide groove. The first slide groove is provided with a T-shaped sliding member that slides in the first slide groove. The front end of the sliding member is provided with an arc-shaped abutment portion. A first spring accommodating cavity and a second spring accommodating cavity are respectively formed between the two sides of the sliding member and the first sliding groove, wherein a first spring and a second spring are respectively arranged in the first spring accommodating cavity and the second spring accommodating cavity, and two ends of the first spring and the second spring are elastically abutted against two ends of the first spring accommodating cavity and the second spring accommodating cavity in the longitudinal direction, respectively. An end of the sliding member away from the arc-shaped abutting portion passes through the first sliding groove and extends along the longitudinal direction of the sliding member; A limiting groove is provided at the lower end of the square shaft along the inner concave ring of the inner wall of the square shaft, wherein the sliding member is engaged with the limiting groove under the influence of the elastic force of the first spring and the second spring; The slider is provided with a threaded hole, through which the slider is threadedly engaged with the threaded rod; the output shaft of the motor is arranged through the bottom plate; and the threaded rod is fixed with a rotating gear for driving the threaded rod to rotate; Wherein, a second driving gear is coaxially fixed on the output shaft of the motor and meshes with the rotating gear for transmission; A first through hole is opened on the bottom plate, wherein a threaded rod is arranged in the first through hole, and a bearing is arranged between the threaded rod and the first through hole, wherein the inner wall of the bearing is fixedly connected to the threaded rod, and the outer wall of the bearing is fixedly connected to the inner wall of the first through hole.

2. A four-axis reduction gearbox with multiple safety protections according to claim 1, characterized in that: The first transmission assembly includes a first multi-layer gear and a first driven gear; The first driven gear is meshed with the first driving gear for transmission; The first multi-layer gear includes a coaxially arranged primary transmission layer and a secondary transmission layer, wherein the first driven gear is meshed with the secondary transmission layer of the first multi-layer gear for transmission, and the first transverse pin is meshed with the primary transmission layer of the first multi-layer gear for transmission.

3. A four-axis reduction gearbox with multiple safety protections according to claim 2, characterized in that: The second transmission assembly includes a second driven gear and a second multi-layer gear having the same structure as the first multi-layer gear; The second driven gear is meshed with the secondary transmission layer of the second multi-layer gear, and the second driven gear is meshed with the first driven gear for transmission; The primary transmission layer of the second multi-layer gear meshes with the second transverse latch for transmission.

4. A four-axis reduction gearbox with multiple safety protections according to claim 3, characterized in that: The third transmission assembly includes a third driven gear, a fourth driven gear, and a third multi-layer gear having the same structure as the first multi-layer gear; The third driven gear is engaged with the secondary transmission layer of the second multi-layer gear for transmission, the fourth driven gear is engaged with the third driven gear, the fourth driven gear is engaged with the secondary transmission layer of the third multi-layer gear for transmission, and the primary transmission layer of the third multi-layer gear is engaged with the third transverse pin for transmission.

5. The four-axis reduction gearbox with multiple safety protections according to claim 4 is characterized in that: The fourth transmission assembly includes a fifth driven gear, a sixth driven gear, and a fourth multi-layer gear having the same structure as the first multi-layer gear; The fifth driven gear is engaged with the secondary transmission layer of the third multi-layer gear for transmission, the fifth driven gear is engaged with the sixth driven gear, the sixth transmission gear is engaged with the secondary transmission layer of the fourth multi-layer gear for transmission, and the primary transmission layer of the fourth multi-layer gear is engaged with the fourth horizontal pin for transmission.

6. A four-axis reduction gearbox with multiple safety protections according to claim 5, characterized in that: The latch assembly further includes a first longitudinal latch and a second longitudinal latch respectively slidably disposed in the housing; The first multi-layer gear and the second multi-layer gear each include three transmission layers; Among them, a seventh driven gear is provided between the third transmission layer of the first multi-layer gear and the first longitudinal pin, and the seventh driven gear is respectively engaged with the third transmission layer of the first multi-layer gear and the first longitudinal pin; Among them, an eighth driven gear is provided between the third transmission layer of the second multi-layer gear and the second longitudinal pin, and the eighth driven gear is respectively engaged with the third transmission layer of the second multi-layer gear and the second longitudinal pin.

7. A four-axis reduction gearbox with multiple safety protections according to claim 6, characterized in that: The secondary transmission layer is formed on the periphery of the primary transmission layer, and the tertiary transmission layer is formed on the periphery of the primary transmission layer. An annular abutment is fixedly provided on the first driving gear, and the annular abutment is arranged along the periphery of the outer wall of the square shaft, wherein an abutment groove is provided on the outer wall of the annular abutment, and a damping groove connected to the outer wall of the annular abutment is formed in the shell, wherein a third spring is provided in the damping groove, and one end of the third spring close to the annular abutment is provided with a bump ball abutting the outer wall of the annular abutment, and the other end of the third spring is provided with a rotating part, and a first thread is provided on the outer wall of the rotating part, and a second thread screwed together with the first thread is provided on the inner wall of the damping groove.

8. The four-axis reduction gearbox with multiple safety protections according to claim 7 is characterized in that: The square shaft is arranged through the shell, and a knob is provided on the top of the square shaft, wherein a fourth spring is provided between the knob and the shell, and the fourth spring contracts evenly from one end close to the shell to one end close to the knob.

9. An operating method for a four-axis reduction gearbox with multiple safety protections, used for operating a four-axis reduction gearbox with multiple safety protections according to any one of claims 1 to 8, characterized in that: The reduction gearbox includes a locked state and an unlocked state; In the locked state, the unlocking steps include the following: Locking step 1: Authentication by fingerprint or face recognition; Locking step 2: After authentication is passed, the motor rotates to raise the square shaft and the knob together; Locking step three: After the square shaft and knob are raised, rotate the knob forward to make the knob drive the square shaft to rotate; Locking step 4: rotating the knob causes the square shaft to rotate, and the square shaft drives the first transmission assembly; Locking step five, the first transmission assembly drives the second transmission assembly; Locking step six, the second transmission assembly drives the third transmission assembly; Locking step seven, the third transmission assembly drives the fourth transmission assembly; In steps 4, 5, 6, and 7, the first transverse latch, the second transverse latch, the third transverse latch, the fourth transverse latch, the first longitudinal latch, and the second longitudinal latch will be retracted synchronously, so that the present invention changes from a locked state to an unlocked state; In the unlocked state, the locking steps include the following: Unlocking step 1: Rotate the knob in the opposite direction to rotate the square shaft; Unlocking step 2: After the knob is rotated to the target position, the square shaft drives the first transmission assembly; Unlocking step three: the first transmission assembly drives the second transmission assembly; Unlocking step 4: the second transmission assembly drives the third transmission assembly; Unlocking step five: the third transmission assembly drives the fourth transmission assembly; In steps 2, 3, 4, and 5, the first transverse latch, the second transverse latch, the third transverse latch, the fourth transverse latch, the first longitudinal latch, and the second longitudinal latch are synchronously extended, causing the present invention to change from an unlocked state to a locked state; Among them, the first horizontal latch, the second horizontal latch, the third horizontal latch, the fourth horizontal latch, the first longitudinal latch and the second longitudinal latch will be synchronously extended to the target position, and the square shaft and the knob will drop to the specified position together.

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