Safety door lock

Abstract

The utility model relates to the technical field of door locks, in particular to a safety door lock, which comprises a lock block a, a lock block b and a lock block c, the locking block b is mounted on the other side door body; the lock cylinder is mounted on the lock block b and is in insertion fit with the lock block a; and the locking mechanism is installed on the locking block a and used for locking, limiting and unlocking the lock cylinder inserted into the locking block a, and the locking mechanism is used for solving the technical problem that in the prior art, a door lock is poor in safety performance due to the fact that a machine tool door deforms or loses efficacy after being used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a safety door lock. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Safety door locks are one of the important devices used to protect personnel safety on CNC machine tools. Their main functions include safety protection, ease of operation, and anti-theft. When the machine door is not completely closed, the safety door lock can detect through sensors that the door is not closed and promptly alarm and shut down the machine to prevent accidental injuries. The types of safety door locks mainly include mechanical safety door locks, electronic safety door locks, and electromagnetic safety door locks. Among them, mechanical safety door locks use mechanical transmission devices to achieve the function of locking the door. They are relatively simple and low-cost, but they require a key to open the door lock and are easily imitated by the key. Electronic safety door locks use electronic chips to open and close the door lock. They are highly secure and easy to operate, but the cost is relatively high. Electromagnetic safety door locks use electromagnetic mechanisms to open and close the door lock. They are highly secure, but have certain requirements for power supply stability and voltage.

[0004] The existing safety door locks such as the announcement number CN216641896U, the patent name of which is a safety door lock for machine tools and a new patent for machine tools, include a lock body and a lock pin. A guide structure is provided between the lock body and the lock pin for guiding the lock body and the lock pin during the matching process. During the matching process between the lock body and the lock pin, the guide structure guides the movement of the lock body and / or the lock pin, so that the lock pin and the lock body will not deflect, the lock pin is aligned with the lock hole of the lock body, and the lock pin can be smoothly inserted into the lock hole of the lock body, thereby avoiding The safety door lock is damaged due to the misalignment of the lock pin and the lock hole of the lock body. This not only improves the reliability of the opening and closing of the safety door, but also increases the service life of the safety door lock and reduces maintenance costs. However, the above technologies still have many problems, such as: ① After the machine tool is used for a long time, the machine tool door safety interlock fails, posing a safety hazard; ② The machine tool door is deformed, resulting in the safety door lock being unable to be used normally, posing a safety hazard; ③ It is impossible to achieve linkage interlocking with the machine tool, resulting in the machine tool door being opened by mistake during operation and causing a safety accident. It cannot be applied to working environments with complex working conditions. Utility Model Content

[0005] The purpose of the utility model is to provide a safety door lock, which is used to solve the technical problem in the prior art that the door lock has poor safety performance due to deformation of the machine tool door or failure after long-term use.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A safety door lock, comprising:

[0008] Lock block a, installed on one side of the door body;

[0009] Lock block b, installed on the other side of the door body;

[0010] The lock core is installed on the lock block b and is inserted into the lock block a;

[0011] The locking mechanism is installed on the lock block a and is used to lock, limit and unlock the lock core inserted into the lock block a.

[0012] Furthermore, the locking mechanism includes:

[0013] A power unit, which is mounted on the locking block a;

[0014] Power plate, installed at the power end of the power unit;

[0015] The locking block is installed to slide relative to the power plate, and a first elastic member is arranged between the top of the locking block and the power plate. The first elastic member is used to make the locking block tend to move away from the power plate. The bottom of the locking block is arranged as a guide surface with one side inclined upward, and the guide surface is arranged on the side facing the lock core.

[0016] Furthermore, the locking block a is provided with a limiting groove for sliding of the locking block, a sliding groove for sliding of the power plate and a slot for sliding of the lock core. The slot is connected with the limiting groove to facilitate the cooperation between the locking block and the lock core to complete the locking action.

[0017] Furthermore, a guide chamfer is provided at the junction of the slot and the locking block a.

[0018] Furthermore, a guide portion is provided at the movable end of the lock core, and a locking groove is provided on the lock core, and the locking groove is used to be inserted and matched with the locking block during the locking action.

[0019] Furthermore, it also includes a sensing mechanism, which is used to sense the position of the lock core in the locked position and transmit the signal to the machine tool control system.

[0020] Furthermore, the sensing mechanism includes:

[0021] A conductive column is installed in a relative sliding manner with the lock block a and contacts and cooperates with the end of the lock core inserted during the locking action. One end of the conductive column is located in the slot, and the other end is installed on the lock block a by a limiting portion. A second elastic member is arranged between the conductive column and the lock block a. The second elastic member is used to make the conductive column tend to approach the lock core.

[0022] Furthermore, the limiting portion is connected to terminal a, and the locking block b is connected to terminal b, and both terminal a and terminal b are made of conductive material.

[0023] Furthermore, the locking block b is provided with an insertion hole and a positioning hole connected thereto, the insertion hole is used for inserting and installing the terminal b, the positioning hole is used for installing a positioning column, and the positioning column is used to limit the terminal b so that it is fixedly installed relative to the locking block b.

[0024] A machine tool comprises the above-mentioned safety door lock. Door bodies on both sides are slidably mounted on the bed of the machine tool, and the safety door locks are respectively mounted on the door bodies on both sides.

[0025] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0026] (1) The present invention provides a locking block a and a locking block b and a locking mechanism, combined with a sensing mechanism, thereby achieving the linkage between the door lock opening and closing states and the machine tool working state without the need for an independent electric control system. It does not require a mechanical key, a complex mechanical structure, or an electronic chip, thereby reducing equipment costs and failure rates, while improving the safety performance of the door lock.

[0027] (2) The present invention sets a specific structure of the locking mechanism and limits the matching structure of the lock block a, the locking block and the lock core, thereby realizing automatic locking when the door is closed, saving work time and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the top structure of the utility model;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross-section structure at AA in the middle;

[0032] Figure 5 for Figure 3 Schematic diagram of the cross-section structure at the middle BB;

[0033] Figure 6 for Figure 2 Schematic diagram of the cross-section structure at CC;

[0034] Figure 7 This is a schematic diagram of the three-dimensional structure of the locking structure of the utility model;

[0035] Figure 8 Schematic diagram of the three-dimensional structure of locking block a;

[0036] Figure 9 This is a schematic diagram of the three-dimensional structure of the locking block a from another perspective;

[0037] Figure 10 It is a schematic diagram of the three-dimensional structure of locking block b.

[0038] 100 in the figure, a first pad;

[0039] 200, second pad;

[0040] 300, locking block a; 301, limiting groove; 302, sliding groove; 303, slot; 3031, guide chamfer;

[0041] 400, locking block b; 401, jack; 402, positioning hole;

[0042] 500, locking mechanism; 501, cylinder; 502, power plate; 503, connecting rod; 504, locking block; 5041, guide surface; 505, first elastic member;

[0043] 600, sensing mechanism; 601, terminal a; 602, terminal b; 603, conductive column; 604, second elastic member; 605, limiting gasket; 606, limiting portion;

[0044] 700, lock core; 701, locking groove; 702, guide part. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0046] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0047] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present application. The singular forms "a," "the," and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0048] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0049] In the description of this application, it should be understood that the terms "first," "second," "third," etc. are used only to distinguish similar objects, and are not necessarily used to describe a specific order or precedence, nor should they be understood to indicate or imply relative importance. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0050] In addition, in the description of this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship. The following further illustrates the present invention with reference to the accompanying drawings and examples.

[0051] In order to solve the limitations of the existing technology, this embodiment provides a technical solution. The technical solution of the present utility model is further described below in conjunction with the drawings and embodiments.

[0052] The present utility model is a technical improvement aimed at the problem that door locks in the prior art become ineffective or cannot be used normally due to deformation of their installation parts after long-term use. The utility model can be used for equipment that needs to lock two door bodies, such as machine tools, such as drilling machines, milling machines, lathes, grinders, etc. The specific improvement plan is as follows.

[0053] See attached Figure 1-3 , a safety door lock, comprising: a lock block a300, mounted on one side of the door body; a lock block b400, mounted on the other side of the door body, the lock block a300 and the lock block b400 are respectively mounted on the two door bodies through a first pad 100 and a second pad 200; a lock core 700, mounted on the lock block b400 and inserted into and matched with the lock block a300; a locking mechanism 500, mounted on the lock block a300, for locking, limiting and unlocking the lock core 700 inserted into the lock block a300. It can be understood here that the lock block a300 can be detachably or fixedly mounted on one side of the door on the machine tool by screws, and the side door can be It can be a fixed or movable door, and the lock block b400 can be detachably installed or fixedly installed on the other side door by screws. The side can be a fixed or movable door, and the lock core 700 can be detachably installed or fixedly installed on the lock block b400 by screws. By setting the lock block a300 and the lock block b400 and the locking mechanism 500, combined with the sensing mechanism 600, it is achieved that while an independent electric control system is not set up, the door lock closing and opening state can be linked with the working state of the machine tool. There is no need for mechanical keys, complex mechanical structures and electronic chips, which reduces equipment costs and failure rates, and improves the safety performance of the door lock.

[0054] See attached Figure 4-6 The locking mechanism 500 includes: a power unit, which is installed on the locking block a300, where the power unit is a cylinder 501 or a linear motor or other linear reciprocating power components; a power plate 502, which is fixedly installed at the power end of the power unit, and the power plate 502 is arranged horizontally; a locking block 504, which is installed to slide relative to the power plate 502, and a first elastic member 505 is arranged between the top of the locking block 504 and the power plate 502, and the first elastic member 505 is used to make the locking block 504 have a distance away from the power plate 502. Trend, the bottom of the locking block 504 is set to a guide surface 5041 with an upward tilt on one side, and the guide surface 5041 is set on the side facing the lock cylinder 700. It can be understood here that the top of the locking block 504 is movably mounted on the power plate 502 through the connecting rod 503. The size of the locking block 504 is larger than the connecting rod 503. The first elastic member 505 is a spring. The spring is mounted on the connecting rod 503 and is located between the power plate 502 and the locking block 504. The top of the connecting rod 503 passes through the power plate 502 and is limited by screws. The locking block a300 is provided with a limiting groove 301 for sliding the locking block 504, a sliding groove 302 for sliding the power plate 502, and a slot 303 for sliding the lock cylinder 700. The limiting groove 301 matches the shape of the locking block 504 and is vertically oriented. The sliding groove 302 matches the shape of the power plate 502 and is vertically oriented. The slot 303 matches the shape of the lock cylinder 700 and is horizontally oriented. The slot 303 is connected to the limiting groove 301 to facilitate the locking action of the locking block 504 and the lock cylinder 700. A guide chamfer 3031 is provided at the intersection of the slot 303 and the locking block a300. Here, the guide chamfer 3031 is in the shape of a trumpet opening outward, so that the lock cylinder 700 can quickly enter the slot 303 when inserted. A guide portion 702 is provided at the movable end of the lock core 700. Here, the guide portion 702 is provided with a tip chamfer so as to enter the slot 303 more smoothly and quickly. A locking groove 701 is provided on the lock core 700. The locking groove 701 is used to be inserted and matched with the locking block 504 during the locking action. Here, the locking groove 701 is provided in the shape of a groove with the opening upward.

[0055] See attached Figure 1 、 2, 4, 6 and 10, also include a sensing mechanism 600, the sensing mechanism 600 is used to sense the position of the lock cylinder 700 in the locked position and transmit the signal to the machine tool control system. Here, it can be understood that when the free end of the lock cylinder 700 contacts and presses against the conductive column 603, the sensing mechanism 600 transmits the signal to the machine tool control system. The sensing mechanism 600 includes: a conductive column 603, which is relatively slidably mounted with the lock block a300 and contacts and cooperates with the end of the lock cylinder 700 inserted during the locking action. One end of the conductive column 603 is located in the slot 303, and the other end is fixed to the lock block a300 by a limiting portion 606. Here, the limiting portion 606 adopts a limiting screw. A second elastic member 604 is arranged between the conductive column 603 and the lock block a300. The second elastic member 604 adopts a spring and is sleeved on the conductive column 603. The second elastic member 604 is used to make the conductive column 603 have a tendency to approach the lock cylinder 700. The terminal a601 is connected to the limiting part 606, and the terminal b602 is connected to the locking block b400. Both the terminal a601 and the terminal b602 are made of conductive materials. The terminal a601 is mounted on the limiting screw and is tightened to the locking block a300 by the limiting screw through the limiting gasket 605. The terminal a601, the terminal b602, the conductive column 603, and the lock core 700 are all made of conductive materials. When the lock core 700 contacts the conductive column 603, a loop is formed with the external machine tool control system to transmit signals. A socket 401 and a positioning hole 402 connected to the locking block b400 are provided on the locking block b400. The socket 401 is used for inserting and installing the terminal b602, and the positioning hole 402 is used for installing the positioning column. The positioning column is used to limit the terminal b602 so that it is fixed relative to the locking block b400. It can be understood here that the socket 401 is in a vertical direction, the positioning block can be in a horizontal direction or an inclined direction, the positioning hole 402 can be set as a screw hole, and the positioning column can be a screw or other threaded component that can be installed in the positioning hole 402.

[0056] A machine tool comprises the above-mentioned safety door lock. Door bodies on both sides are slidably mounted on the machine tool bed, and the safety door locks are respectively mounted on the door bodies on both sides.

[0057] When using the door lock of the present invention, when locking is required, the two door bodies of the machine tool are merged into contact. At this time, the free end of the lock cylinder 700 is inserted into place through the slot 303 until the free end of the lock cylinder 700 contacts the conductive column 603. The conductive column 603 is compressed and transmits a signal to the machine tool control system. At the same time, the locking block 504 of the locking mechanism 500 drops into the locking groove 701 of the lock cylinder 700 under the elastic force of the first elastic member 505, completing the locking action, and the machine tool works. When the machine tool is finished working, the machine tool control system sends a signal to activate the power unit to retract the locking block 504. At this time, unlocking is completed and the machine tool door can be opened.

[0058] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safety door lock, characterized in that: include: Lock block a (300), installed on one side of the door body; Lock block b (400), installed on the other side door body; A lock core (700) is mounted on the lock block b (400) and inserted into and engaged with the lock block a (300); The locking mechanism (500) is mounted on the locking block a (300) and is used to lock, limit, and unlock the lock core (700) inserted into the locking block a (300).

2. A safety door lock according to claim 1, characterized in that: The locking mechanism (500) comprises: A power unit, the power unit being mounted on the locking block a (300); A power plate (502) mounted on the power end of the power unit; The locking block (504) is installed to slide relative to the power plate (502), and a first elastic member (505) is provided between the top of the locking block (504) and the power plate (502). The first elastic member (505) is used to make the locking block (504) have a tendency to move away from the power plate (502). The bottom of the locking block (504) is provided with a guide surface (5041) with one side tilted upward, and the guide surface (5041) is provided on a side facing the lock core (700).

3. A safety door lock according to claim 2, characterized in that: The locking block a (300) is provided with a limiting groove (301) for sliding the locking block (504), a sliding groove (302) for sliding the power plate (502), and a slot (303) for sliding the lock core (700). The slot (303) is connected to the limiting groove (301) to facilitate the locking block (504) and the lock core (700) to cooperate to complete the locking action.

4. A safety door lock according to claim 3, characterized in that: A guide chamfer (3031) is provided at the junction of the slot (303) and the locking block a (300).

5. A safety door lock according to claim 4, characterized in that: A guide portion (702) is provided at the movable end of the lock core (700), and a locking groove (701) is provided on the lock core (700). The locking groove (701) is used to be inserted and matched with the locking block (504) during a locking action.

6. A safety door lock according to any one of claims 3 to 5, characterized in that: It also includes a sensing mechanism (600) for sensing the position of the lock core (700) in the locked position and transmitting the signal to the machine tool control system.

7. A safety door lock according to claim 6, characterized in that: The sensing mechanism (600) comprises: A conductive column (603) is mounted so as to slide relative to the lock block a (300) and is in contact with the end of the lock core (700) inserted during the locking action. One end of the conductive column (603) is located in the slot (303), and the other end is mounted on the lock block a (300) by a limiting portion (606). A second elastic member (604) is provided between the conductive column (603) and the lock block a (300). The second elastic member (604) is used to make the conductive column (603) have a tendency to approach the lock core (700).

8. A safety door lock according to claim 7, characterized in that: The limiting portion (606) is connected to a terminal a (601), and the locking block b (400) is connected to a terminal b (602). Both the terminal a (601) and the terminal b (602) are made of conductive material.

9. A safety door lock according to claim 8, characterized in that: The locking block b (400) is provided with a socket (401) and a positioning hole (402) connected thereto. The socket (401) is used for inserting and installing the terminal b (602). The positioning hole (402) is used for installing a positioning column. The positioning column is used to limit the terminal b (602) so that it is fixedly installed relative to the locking block b (400).

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