WO2020015600A1

WO2020015600A1 - Lock cylinder

Info

Publication number: WO2020015600A1
Application number: PCT/CN2019/095931
Authority: WO
Inventors: 朱昱旻; 钱考锦; 龚章平; 闵浩
Original assignee: 南京东屋电气有限公司
Priority date: 2018-07-16
Filing date: 2019-07-15
Publication date: 2020-01-23
Also published as: CN108590365B; CN108590365A

Abstract

Disclosed is a lock cylinder comprising a liner. The liner is internally provided with a driving device. An output end of the driving device is a rotating shaft. The rotating shaft is connected and fixed with a first cam and drives the rotation of the first cam. The first cam is connected to a second cam in a plane of rotation thereof in a sheathed manner, and the first cam drives the rotation of the second cam. The beneficial effect of the present invention lies in: owing to the cooperative effect of the first cam and the second cam, the requirements for an electric motor and the first cam are relatively low, such that the service life of the lock cylinder can be noticeably prolonged. By means of the design of a first groove, the liner is fixed, and rotation reversing of the liner can be also realized.

Description

Lock cylinder

Technical field

The invention relates to a lock component, in particular to a lock core.

Background technique

A complete set of locks includes a key and a lock cylinder. The lock cylinder according to the present invention realizes the opening and closing of the lock cylinder through an electronic key. It is suitable for places such as archives, where there are multiple file cabinets. If each file cabinet is equipped with a key, when the lock needs to be unlocked, finding the correct key may result in a waste of time. Therefore, it is the best solution to select the rotation of the electronic key drive motor to unlock.

The unlocking is achieved by the rotation of the motor. The technical solution adopted in the prior art is to unlock the lock by rotating a cam through the motor. The disadvantage of the above technical solution is that the torque caused by the rotation of the motor may cause damage to the cam and the motor, and then affect the lock Core life.

Summary of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes a lock cylinder. The double cam structure rotates in cooperation with the motor shaft. The first cam is directly connected to the motor shaft and is responsible for torque transmission. The second cam and the first cam The connection is responsible for the clutch of the lock cylinder.

In order to achieve the above-mentioned object, the present invention adopts the following technical solutions:

A lock cylinder includes a liner, wherein the liner is provided with a driving device, and an output end of the driving device is a rotating shaft, the rotating shaft is fixedly connected with the first cam, and drives the first cam to rotate. The first cam is sleeved with a second cam on its rotation plane, and the first cam drives the second cam to rotate.

As a preferred solution, the driving device is a motor.

As a preferred solution, the second cam is ring-shaped as a whole, and includes an arc-shaped upper and lower portion, and further includes a left portion and a right portion in which the outer ring is recessed and the inner ring projects; the first cam is integrally disposed on the second Within the inner ring of the cam.

As a preferred solution, the shape of the inner ring of the second cam is a figure 8 as a whole.

As a preferred solution, the end points of the upper portion on the inner circle are points A and B, the end points of the lower portion on the inner ring are points C and D, and the center point of the second cam is point O, and the line segment AB and the line segment CD is a part of a circle formed by the line segment OA as a radius.

As a preferred solution, both ends of the first cam are arc-shaped.

As a preferred solution, the end points of the upper portion located on the inner circle are points A and B, the end points of the lower portion located on the inner circle are points C and D, and the left portion is located at the high point protruding from the inner circle as point E, so The point where the right part is located at the protruding high point of the inner circle is point F; when the first cam drives the second cam to rotate, the line segment AE and the line segment DF are simultaneously the force unit or the line segment CE and the line segment BF are the force unit simultaneously.

As a preferred solution, the first cam is rectangular parallelepiped, rhombic, or triangular.

As a preferred solution, the lock cylinder further includes a tailstock in contact with the inner liner and fixed in cooperation.

As a preferred solution, at least one notch is provided on the circumference of the upper bottom surface of the inner liner, and a protrusion corresponding to the notch is provided at the lower end of the tailstock, and the notch and the protrusion are engaged together.

As a preferred solution, the number of the notches and protrusions is two.

As a preferred solution, the tailstock includes a body, and the body is integrally formed into a two-stage cylindrical shape, which are an upper cylinder and a lower cylinder, respectively. The diameter of the lower cylinder is the same as the outer diameter of the liner, and the upper end of the upper cylinder is provided with a lock cylinder. Output.

As a preferred solution, the lower end of the lower cylinder of the body is provided with a protruding surface, and the protruding surface is cylindrical as a whole, and the diameter of the protruding surface is slightly smaller than the inner diameter of the liner.

As a preferred solution, the upper surface of the second cam is respectively provided with a limiting post at the left and right positions; the bottom surface of the lower cylinder of the body is provided with two symmetrical waist-shaped holes. When put together, the limiting post also falls into the range of the waist-shaped hole.

As a preferred solution, after the limiting post contacts both ends of the waist hole, the included angle formed by the two points where the central axis of the limiting post is connected to the center point of the bottom of the lower cylinder is between 80 degrees and 100 degrees, respectively. .

As a preferred solution, a shell is further included, the shell is integrally cylindrical, a fourth through hole is provided on an upper bottom surface of the shell, a fifth through hole is provided on a lower bottom surface of the shell, and a diameter of the fourth through hole is equal to a tail The diameter of the upper cylinder of the seat body is smaller than the diameter of the lower cylinder.

As a preferred solution, a first groove is provided along the direction of the circumferential cross section of the liner, and two pairs of fixing holes are provided at positions corresponding to the height of the casing, and only one pair of fixing holes of the two pairs of fixing holes are inserted into the pin.

As a preferred solution, the arbitrary pair of fixing holes are coaxial circumferential holes.

As a preferred solution, an angle formed by connecting the two end points of the first groove and the circle center is between 180 degrees and 190 degrees.

As a preferred solution, the inner bladder is provided with at least one locking hole at a position on the same horizontal plane as the second cam, and a locking steel ball is provided in the locking hole.

As a preferred solution, there are two locking holes and locking steel balls, respectively.

As a preferred solution, upper and lower outer sides of the second cam are provided with limiting grooves.

As a preferred solution, a positioning hole is provided in the horizontal direction of the lower cylinder of the body of the tailstock, a spring is provided in the positioning hole, and a positioning steel ball is provided at each end of the spring.

As a preferred solution, a first through hole is provided on the upper and lower surfaces of the bladder, and a second through hole is provided on the lower bottom surface of the bladder; a guard plate is provided at the bottom of the bladder. A third through hole is provided in the middle of the board, and the input end of the motor passes through the third through hole and is exposed at the bottom surface of the inner liner.

As a preferred solution, the input end of the motor is a port for receiving an electronic key command and a power source.

The beneficial effect of the present invention is that due to the cooperation of the first cam and the second cam, the requirements for the motor and the first cam are relatively low, and the service life of the lock cylinder can be significantly extended. The design of the first groove not only fixes the liner, but also realizes the rotation and reversal of the liner.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an exploded view of the lock cylinder.

Figure 2 is a schematic diagram of the structure of the inner liner.

FIG. 3 is a schematic diagram of a first cam structure and a connection with a rotating shaft.

FIG. 4 is a schematic diagram of the three-dimensional structure of the second cam.

Fig. 5 is a sectional view of a second cam.

Fig. 6 is a structural schematic diagram of a tailstock.

Fig. 7 is a plan view of the bottom structure of the tailstock.

Fig. 8 is a sectional view of the rotation surface of the lock cylinder cam when the lock cylinder is closed.

Fig. 9 is a sectional view of the rotation surface of the lock cylinder cam when the lock cylinder is opened.

detailed description

The present invention is described in further detail below with reference to the drawings.

As shown in FIG. 1 and FIG. 2, a lock cylinder 1 includes an inner liner 11. The inner liner 11 is used to place parts of the lock cylinder 1. The inner liner 11 is a hollow cylinder. The bladder 11 can also be made into a non-cylindrical shape. Generally, it is considered that the inner shape of the bladder 11 is cylindrical. The upper bottom surface 111 of the liner 11 is provided with a first through hole 113, and the lower bottom surface 112 of the liner 11 is provided with a second through hole 114. The diameters of the first through hole 113 and the second through hole 114 are too small as required. Adjustment.

A protective plate 12 is provided on the bottom of the inner liner 1. A magnetic device 13 is provided on the protective plate 12. The protective plate 12 and the magnetic device 13 are both annular. A third through hole 115 is provided between the protective plate 12 and the magnetic device 13. In order to prevent the guard plate 12 from falling off from the bottom surface 111 of the liner, the diameter of the guard plate 12 is larger than the diameter of the first through hole 113. The input end 141 of the motor 14 passes through the third through hole 115 and is exposed at the bottom surface of the inner liner 11. Here, the diameter of the third through hole 115 is smaller than the width of the motor 14 and larger than the width of the input end 141, so that the motor 14 will not fall off from the third through hole 115, and the input end 141 can be completely exposed. The motor input terminal 141 is a port for receiving an electronic key command and a power supply. When the motor input terminal 141 receives a power supply and a correct unlocking command, the motor output terminal, that is, the rotation shaft 142 of the motor 14 is rotated.

The following content will relate to an important innovation of this embodiment. Usually, the motor shaft drives a cam to rotate to realize the opening and closing of the lock. The disadvantage of this design is that when an external force acts on the cam and then acts on the motor shaft, the probability of the shaft being damaged will be greatly increased. The core solution of the design of this embodiment is to design two cams to work together to prevent the motor shaft from being damaged by external forces.

As shown in FIG. 3, the rotating shaft 142 is connected to the first cam 15. The first cam 15 rotates with the rotating shaft 142. The first cam 15 drives the second cam 16 to rotate. The center point 151 of the first cam 15 is connected and fixed to the rotating shaft 142.

As shown in FIG. 4 and FIG. 5, the second cam 16 has a ring shape as a whole, and includes an arc-shaped upper portion 161 and a lower portion 162, and further includes a left portion 163 and a right portion 164 in which the outer ring is recessed and the inner ring projects. 161. The lower portion 162, the left portion 163, and the right portion 164 are enclosed to form a second cam.

Because of the arc-shaped upper portion 161 and lower portion 162, the second cam 16 can be placed in the inner liner 11 as a whole, and can rotate in the inner liner 11. In order to achieve the purpose of the second cam 15 to drive the second cam 16 to rotate, the first cam 15 needs to be able to be placed inside the inner ring 165 of the second cam as a whole, and the shape of the inner ring is a figure 8 as a whole.

For a detailed description of the structure of the inner ring 165 of the second cam, please refer to the cross-sectional view of the second cam 16 shown in FIG. 5. The end points of the inner ring of the upper portion 161 are points A and B, and the end points of the inner ring of the lower portion 162. For points C and D, the high point protruding from the inner circle of the left 163 is point E, and the high point protruding from the inner circle of the right 164 is point F. After the above six points are determined, the inner circle 165 of the second cam can be determined Structure. The up, down, left, and right here are just for the convenience of explaining the structure of the second cam 16. When the angle of view of the second cam 16 changes, the up, down, left, and right can often be changed.

The line segment AB and the line segment CD are arc-shaped. If the center point O of the second cam is used as a round point and the line segment OA is used as the radius to draw a circle, the line segment AB and the line segment CD are part of the circle. Line segment AE, line segment DF and its extension line are parallel lines; similarly, line segment CE, line segment BF and its extension line are parallel lines. When the first cam drives the second cam to rotate, the line segment AE and the line segment DF are simultaneously the force receiving unit, or the line segment CE and the line segment BF are simultaneously the force receiving unit. As long as the first cam 15 satisfies the above conditions, it may be selected to be a rectangular parallelepiped, a rhombic or triangular shape, or even other irregular shapes.

It can be seen that the structure of the first cam 15 is often changeable, and the conditions that restrict its structure include two points. One is that the overall structure is limited to the inner circle of the second cam 16, and the other is to achieve Line segment AE, line segment DF, line segment CE, line segment BF are simultaneously stressed. Those skilled in the art can satisfy the above premise, and select a first cam with a different structure.

It should be noted that when the first cam 15 and the second cam 16 work in cooperation, without considering the error, it should be considered that the center point of the rotating shaft 142, the first cam 15 and the second cam 16 are coincident. .

In order to avoid the angle of the arc AB and the arc CD, the two ends 152 and 153 of the first cam 15 are designed to be arc-shaped to cooperate with the arc AB and the arc CD of the inner circle of the second cam 16.

After the above structures of the first cam 15 and the second cam 16 are determined, the first cam 15 can be used to drive the second cam 16 to rotate, whether clockwise or counterclockwise.

As shown in FIG. 1, as the lock core, the final technical purpose of this embodiment is to achieve the closing and opening of the lock core. Therefore, the lock core 1 further includes a tailstock 17 in contact with the upper bottom surface 111 of the inner liner 11 and fixed in cooperation. There are two notches 116 on the circumference of the upper bottom surface 111 of the bladder 11, and the number of the notches 116 is at least one, or a plurality of notches 116 may be provided. In view of comprehensive technical effects and manufacturing costs, the number of notches is preferably set to two.

As shown in FIG. 6 and FIG. 7, the tailstock 17 includes a main body 171, and the main body 171 is formed into a two-stage cylinder as a whole, which are an upper cylinder 172 and a lower cylinder 173, respectively. An output end 174 of the lock cylinder is provided at the upper end of the cylinder 172 to realize the opening and closing of the lock. In this embodiment, the output end 174 of the lock cylinder is provided as a threaded post. In an actual application process, the output end 174 of the lock cylinder Can be set to any other desired shape.

A protruding surface 175 is provided at the lower end of the body 171, and the protruding surface 175 has a cylindrical shape as a whole. The diameter of the protruding surface 175 is slightly smaller than the inner diameter of the inner liner 11. Thus, the protruding surface 175 can be put into the inner liner 11 without Will be trapped in the liner 11.

In order to fix the tailstock 17 and the liner 11, a protrusion 176 corresponding to the notch 116 is provided at the lower end of the lower cylinder 173, and the notch 116 and the protrusion 176 are engaged together to realize synchronous rotation of the liner 11 and the tailstock. In order to achieve the above purpose, it is also necessary to cause the second cam 16 to exert a force with the tailstock.

As can be seen from the foregoing, the second cam 16 is formed in a ring shape as a whole, including an upper surface 166 and a lower surface 167. The lower surface 167 is smooth. The inner surface of the inner liner 11 is close to the motor 14, but no contact occurs. In summary, the first The lower surface 167 of the two cams 16 is not a force receiving surface. In contrast, the upper surface 166 is provided with the limiting post 168 on the left portion 163 and the right portion 164, respectively.

The protruding surface 175 is provided with two symmetrical waist-shaped holes 177. After the notch 116 and the protrusion 174 are engaged together, the limiting post 168 also falls within the range of the waist-shaped hole 177. When the motor shaft 142 drives the first cam 15 to rotate, the first cam 15 drives the second cam 16 to rotate, and the second cam 16 drives the tailstock 17 to rotate. The function of the waist-shaped hole 177 is not only to serve as a force receiving unit of the limiting post 168, but also to limit the rotation angle of the second cam. Assuming that the waist-shaped hole 177 is not provided with any device that cooperates with the limiting post 168, the force on the limiting post 168 cannot be transmitted to the tailstock 17, and the unlocking function cannot be realized. Assuming that the waist-shaped hole 177 is designed as a round hole, and there is no space for free rotation after the limiting post 168 engages with the round hole, the second cam 16 and the tailstock 17 form a virtually integrated structure, which is not conducive to the protection of the motor 14. Therefore, in this embodiment, the rotation angle of the limiting post 168 in the waist-shaped hole 177 is preferably 90 degrees. From the perspective of achieving the technical effect of the present invention, the rotation angle of the limiting post 168 in the waist-shaped hole 177 is Technical effects can be better achieved between 80 degrees and 100 degrees. Correspondingly, as shown in FIG. 7, after the limiting post 168 contacts the two ends of the waist hole 177, the two points where the central axis of the limiting post 168 is located are point G and point H, and point G and point H and The included angle formed by the line connecting the center point O of the protruding surface 175 is between 80 degrees and 100 degrees.

After the inner liner 11 and the tailstock 17 are fixed, it also needs to include a shell 18, which is formed into a cylindrical shape as a whole. The outer surface of the shell 18 is provided with threads, which facilitates the installation of the lock cylinder when in use. The liner 11 and the tailstock 17 can always rotate freely in the casing 18 without other external force restrictions. The upper bottom surface 181 of the housing is provided with a fourth through hole 183, and the lower bottom surface 182 of the housing is provided with a fifth through hole 184. The diameter of the fourth through hole 183 is equal to the diameter of the cylinder 172 on the tailstock 17 body 171, which is smaller than the diameter of the lower cylinder 173. Therefore, the tailstock 17 can be fixed to the upper bottom surface 181 of the housing. At this time, the tailstock 17 and the inner liner 11 can only move toward the lower bottom surface of the housing. To this end, a first groove 186 is provided in the direction of the circumferential cross section of the inner liner 11, and two pairs of fixing holes are provided at the corresponding height positions of the housing. 187. Any pair of fixing holes is a coaxial circumferential hole. When the first groove 186 is located between a certain pair of fixing holes 187 and a pin 188 is inserted between the two fixing holes, the pin plays a role of fixing and limiting.

From the direction of the upper and lower forces of the casing 18, the inner liner cannot move downwards freely due to the pin 188 that is caught in the first groove 186; as can be seen from the above, since the diameter of the fourth through hole 183 is smaller than The diameter of the lower cylinder 173 of the tailstock does not allow the tailstock to move freely upwards; the above two designs fix the tailstock 17 and the liner 11 in the up-down direction.

Judging from the rotation of the tailstock 17 and the liner 11 in the housing 18, if the first groove is 360 degrees, even if the pin 188 is inserted in the first groove 186, the tailstock 17 and the liner 11 can be unaffected. For limited free rotation, the angle formed between the two ends of the first groove 186 and the center of the circle needs to be controlled between 180 degrees and 190 degrees. As mentioned above, the casing 18 is provided with two pairs of fixing holes 187, and selecting the other pair of fixing holes 187 to insert pins can realize the rotation and reversal of the tailstock 17 and the liner 11.

The second cam 16 is ring-shaped as a whole, and includes an arc-shaped upper portion 161 and a lower portion 162, and further includes a left portion 163 and a right portion 164 in which the outer ring is recessed and the inner ring projects. When the second cam 16 is installed in the inner bladder 11, because the upper portion 161 and the lower portion 162 are correspondingly arc-shaped, the distance between the outer sides of the upper portion 161 and the lower portion 162 and the inner wall of the inner sleeve 11 is basically unchanged. Because the left portion 163 and the right portion 164 have a design in which the outer circle is indented, the distances between the points on the outside of the left portion 163 and the right portion 164 from the inner wall of the liner 11 are significantly changed.

On the inner liner 11, at least one locking hole 190 is provided at the same level as the second cam, and a locking steel ball 191 is provided in the locking hole 190. The preferred design is to select two locking holes and locking steel balls. It is even possible to provide multiple locking holes and locking steel balls.

As shown in FIG. 8 and FIG. 9, in this embodiment, the two locking holes 190 and the locking steel balls 191 are taken as examples to describe the cooperative working relationship between the locking steel balls 191 and other components. In the initial state, the outer sides of the upper portion 161 and the lower portion 162 of the second cam 16 abut against the locking steel balls 191, respectively. The locking steel balls 191 are located in the second grooves 189 in the inner wall of the housing 18. The rotation direction of the inner liner 11 is vertical. Therefore, the two sides of the second groove 189 restrict the rotation of the inner liner 11. At this time, the lock cylinder is closed, and neither the inner liner 11 nor the tailstock 17 can rotate. When the lock cylinder needs to be turned on, a power source and a key are input from an input terminal 141 of the motor, the motor 14 is actuated, the rotating shaft 142 drives the first cam 15 to rotate, and further drives the second cam 16 to rotate 90 degrees. Due to the recessed design of the left portion 163 and the right portion 164 of the second cam, the locking steel ball 191 can move freely in the recessed direction, so that the locking steel ball 191 is released from the restraint of the second groove 189. At this time, the inner liner 11 Can achieve free rotation.

In order to maintain a relatively stable initial position relationship between the liner 11 and the casing 18, a positioning hole 178 is provided in the lower cylinder 173 of the body 171 of the tailstock 17, and a spring 179 is provided in the positioning hole 178. Both ends of the spring 179 Each positioning steel ball 192 is provided. When the positioning steel balls 192 are rotated to the second groove 189, they are moved by the pressure of the spring 179 toward the second groove 189, and the positioning steel balls 192 can be kept in the second groove 189. No displacement occurs in this way, thus achieving the role of positioning. The positioning holes 178 can also be made into an impermeable structure, so that two holes are formed, and springs are respectively placed in them, and similar technical effects can also be achieved.

The core of the difference between the function of the locking steel ball 191 and the positioning steel ball 192 is that the second cam 16 is in contact with the locking steel ball 191, and the second cam 16 is a rigid structure. The locking steel ball 191 cannot enter the second groove 189. The second cam upper portion 161 and the lower portion 162 move in the direction. The spring 179 in contact with the positioning steel ball 192 is an elastic member, and a slight rotating force is applied to the tailstock 17 to move the positioning steel ball 192 in the direction of the spring 179, thereby detaching from the restriction of the second groove 189.

When the lock steel ball 191 is in contact with the upper portion 161 and the lower portion 162 of the second cam 16, because it is a smooth contact, if the lock cylinder is affected by some vibration or shaking, it may cause the second cam 16 to rotate, resulting in an incorrect lock cylinder. To open. In order to solve the above problem, a limiting groove 169 is provided outside the upper portion 161 and the lower portion 162 of the second cam 16.

The magnetic device 13 provided in the inner container mentioned above is not an essential technical feature of the present invention. The magnetic device 13 is provided to cooperate with other components to realize the position monitoring function of the component. The detailed technical solution will be disclosed by another invention patent.

When the lock core mentioned above changes from the closed initial state to the opened state, the first cam 15 often rotates an angle a in the opposite direction from the unlocking direction, and then rotates in the unlocking direction to unlock the lock. The selection of the angle a will also be determined by Another invention patent is disclosed.

Claims

A lock cylinder includes a liner, wherein the liner is provided with a driving device, and an output end of the driving device is a rotating shaft, the rotating shaft is fixedly connected with the first cam, and drives the first cam to rotate. The first cam is sleeved with a second cam on its rotation plane, and the first cam drives the second cam to rotate.
The lock cylinder according to claim 1, wherein the driving device is a motor.
The lock core according to claim 1, wherein the second cam is ring-shaped as a whole, including an arc-shaped upper portion and a lower portion, and further comprising a left portion and a right portion where the outer ring is recessed and the inner ring projects. The first cam is integrally disposed within the inner ring of the second cam.
The lock core according to claim 3, wherein the shape of the inner ring of the second cam is a figure 8 as a whole.
The lock core according to claim 3, wherein the end points of the upper portion on the inner ring are points A and B, the end points of the lower portion on the inner ring are points C and D, and the second The center point of the cam is point O, and the segment AB and the segment CD are part of a circle formed by the segment OA as a radius.
The lock core according to claim 3, wherein both ends of the first cam are arc-shaped.
The lock core according to claim 3, wherein the end points of the upper portion on the inner ring are points A and B, the end points of the lower portion on the inner ring are points C and D, and the left portion The high point protruding from the inner ring is point E, and the right portion protruding from the inner ring is point F; when the first cam drives the second cam to rotate, the line segment AE and the line segment DF are both the force unit or the line segment CE. The line segment BF is a force unit at the same time.
The lock core according to claim 7, wherein the first cam is a rectangular parallelepiped, a rhombic or triangular shape.
The lock core according to claim 1, wherein the lock core further comprises a tailstock contacting the inner liner and being fixed in cooperation.
The lock core according to claim 9, wherein at least one notch is provided on a circumference of an upper bottom surface of the inner liner, and a lower end of the tailstock is provided with a protrusion corresponding to the notch, and the notch Engage with the bump.
The lock core according to claim 10, wherein the number of the notches and protrusions is two.
The lock cylinder according to claim 9, characterized in that the tailstock comprises a body, and the body is formed into a two-stage cylinder as a whole, the upper cylinder and the lower cylinder, respectively, and the diameter of the lower cylinder and the outer diameter of the inner cylinder The diameter is the same. The upper end of the upper cylinder is provided with the output end of the lock cylinder.
The lock core according to claim 12, wherein the lower end of the lower cylinder of the body is provided with a protruding surface, and the protruding surface is cylindrical as a whole, and the diameter of the protruding surface is slightly smaller than the inner diameter of the liner.
The lock cylinder according to claim 12, wherein the upper surface of the second cam is provided with a limiting post at the left and right positions, respectively; two are provided on the bottom surface of the lower cylinder of the body The symmetrical waist-shaped hole, when the notch and the protrusion are engaged together, the limiting post also falls into the range of the waist-shaped hole.
The lock core according to claim 14, characterized in that, after the limiting post contacts the two ends of the waist hole, two points where the central axis of the limiting post is respectively connected to the center point of the bottom surface of the lower cylinder The included angle is between 80 and 100 degrees.
The lock core according to claim 12, further comprising a housing, wherein the housing is cylindrical as a whole, a fourth through hole is provided on an upper bottom surface of the housing, and a fifth through is provided on a lower bottom surface of the housing. The diameter of the fourth through hole is equal to the diameter of the upper cylinder of the tailstock body and smaller than the diameter of the lower cylinder.
The lock cylinder according to claim 16, wherein a first groove is provided along the direction of the circumferential section of the inner liner, and two pairs of fixing holes are provided at corresponding height positions of the shell, and only one of the two pairs of fixing holes Insert a pin into the fixing hole.
The lock core according to claim 17, wherein the arbitrary pair of fixing holes are coaxial circumferential holes.
The lock core according to claim 17, wherein an angle formed by connecting the two end points of the first groove and the circle center is between 180 degrees and 190 degrees.
The lock core according to claim 16, wherein at least one locking hole is provided on the inner liner at a position on the same level as the second cam, and a locking steel ball is provided in the locking hole.
The lock core according to claim 20, wherein the lock holes and the lock steel balls are two respectively.
The lock cylinder according to claim 20, wherein the upper and lower portions of the second cam are provided with limiting grooves on the outer sides.
The lock core according to claim 16, wherein a positioning hole is provided in the horizontal direction of the lower cylinder of the body of the tailstock, a spring is provided in the positioning hole, and two ends of the spring are provided respectively One positioning steel ball.
The lock cylinder according to claim 1, wherein a first through hole is provided on an upper bottom surface of the inner liner, and a second through hole is provided on a lower bottom surface of the inner liner; A third through hole is provided in the middle of the protective plate, and the input end of the motor passes through the third through hole and is exposed at the bottom surface of the inner liner.
The lock core according to claim 24, wherein the input end of the motor is a port for receiving an electronic key command and a power source.