Novel pressure switch applied to machine tool turntable

Abstract

The utility model relates to the technical field of machine tool rotary table accessories, and discloses a novel pressure switch applied to a machine tool rotary table, which comprises a shell seat, an inner cavity is arranged in the shell seat, a top cover is fixedly arranged at the upper end of the shell seat, and a piston rod is slidably connected in the inner cavity. The upper end of the piston rod is in threaded connection with an inner hexagonal screw, the piston rod slidably penetrates through the end face of the top cover, a spring is fixedly connected between the top cover and the piston rod, a proximity switch assembly is arranged on the side, close to the inner hexagonal screw, of the top cover, and an air pipe connector is fixedly connected to the side of the shell base. The pressure switch has the advantages that the anti-interference capability is good, the stability of the mechanical structure of the pressure switch is improved, the pressure switch can be conveniently applied to complex and severe application working condition environments, and the service life of the pressure switch can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool turntable accessories, and more specifically, to a novel pressure switch applied to a machine tool turntable. Background Art

[0002] The pressure switch of the machine tool turntable can be divided into mechanical and electronic types according to the detection principle. The mechanical type is not prone to failure and has a service life of up to millions of times. The electronic type is unstable and prone to failure. The mechanical pressure switch can be divided into reed switch type and diaphragm spring type according to the mechanical principle. The reed switch realizes the on and off of the signal by pushing the electric contact to be connected or separated by the magnetic force of the magnet. The mechanical reed principle is a two-wire system and can only output one state signal. The diaphragm spring type can switch the state under pressure, push the contact to contact or disconnect, and is a three-wire system, which can output two state signals. However, the diaphragm spring has low fatigue strength and is easy to fail. The mechanical contact is also prone to failure. The existing pressure switch of the machine tool turntable has poor water and oil resistance. Due to the harsh environment of the machine tool turntable, there are usually liquids such as water and oil, and occasionally accompanied by vibration, which makes it difficult for the pressure switch to be suitable for this application environment, affecting the service life. Based on this, the utility model designs a new type of pressure switch used for the machine tool turntable to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a new type of pressure switch used in a machine tool turntable to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of pressure switch used for a machine tool turntable, comprising a shell seat, an inner cavity is opened inside the shell seat, a top cover is fixedly installed on the upper end of the shell seat, a piston rod is slidably connected to the inside of the inner cavity, the upper end of the piston rod is threadedly connected to a hexagon socket screw, the piston rod slides through the end surface of the top cover, a spring is fixedly connected between the top cover and the piston rod, a proximity switch assembly is arranged on one side of the top cover near the hexagon socket screw, an air pipe joint is fixedly connected to the side of the shell seat, a vent is opened at the bottom of the inner cavity in the shell seat, and the vent is connected to the air pipe joint.

[0005] As a preferred technical solution of the utility model, the proximity switch assembly includes an upper proximity switch and a lower proximity switch, and the upper proximity switch and the lower proximity switch are fixedly installed on the top cover in an upper and lower interval.

[0006] As a preferred technical solution of the utility model, an O-ring is fixedly installed on the outer side of the top cover, and the peripheral side of the O-ring abuts against the inner side wall of the shell seat.

[0007] By means of such an arrangement, the sealing performance between the housing seat and the top cover can be ensured by using an O-type sealing ring.

[0008] As a preferred technical solution of the utility model, a piston rod seal is fixedly installed on the inner side of the top cover, and the piston rod seal is slidably sleeved on the outer side of the piston rod.

[0009] By means of such an arrangement, the sealing between the housing seat and the top cover can be ensured by means of the piston rod seal.

[0010] As a preferred technical solution of the utility model, an assembly screw hole is opened on the bottom side of the shell seat, and a fastening bolt is threadedly connected through the assembly screw hole.

[0011] As a preferred technical solution of the utility model, the number of the assembly screw holes is two, and the two assembly screw holes are symmetrically distributed on the bottom side of the shell seat.

[0012] By means of such an arrangement, the purpose of being able to stably and securely assemble the shell seat is achieved.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model utilizes a spring to push the piston rod to the bottom of the inner cavity of the shell seat. This is the initial state. The lower proximity switch in the proximity switch assembly detects a signal. If there is enough air pressure entering the inner cavity of the shell seat through the air pipe joint and the air vent, the piston rod will move upward under pressure, and the spring between the top cover and the piston rod will shrink. At this time, the signal of the lower proximity switch in the proximity switch assembly is disconnected, and the upper proximity switch in the proximity switch assembly detects a signal. The piston rod can stably move up and down along the inner cavity of the shell seat and the top cover, has good anti-interference ability, can still move smoothly under external jitter, and improves the stability of the mechanical structure of the pressure switch. By adopting the proximity switch assembly formed by the upper proximity switch and the lower proximity switch, even if there are liquids such as water and oil in the outside world, the detection signal is still stable, which is convenient for use in complex and harsh application environments and is conducive to ensuring the service life of the pressure switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic cross-sectional view of a new type of pressure switch used for a machine tool turntable according to the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0017] Figure 3 The utility model is a side view structural schematic diagram of a new type of pressure switch used for a machine tool turntable.

[0018] In the figure: 1. Shell seat; 101. Inner cavity; 1011. Vent; 102. Assembly screw hole; 103. Fastening bolt; 2. Top cover; 201. O-ring; 202. Piston rod seal; 3. Piston rod; 301. Hexagon socket screw; 4. Spring; 5. Proximity switch assembly; 501. Upper proximity switch; 502. Lower proximity switch; 6. Air pipe connector. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figures 1 to 3 As shown, the utility model provides a new type of pressure switch used for a machine tool turntable, including a shell base 1, an inner cavity 101 is opened inside the shell base 1, a top cover 2 is fixedly installed on the upper end of the shell base 1, a piston rod 3 is slidably connected inside the inner cavity 101, a hexagon socket screw 301 is threadedly connected to the upper end of the piston rod 3, the piston rod 3 slides through the end surface of the top cover 2, a spring 4 is fixedly connected between the top cover 2 and the piston rod 3, a proximity switch assembly 5 is arranged on one side of the top cover 2 near the hexagon socket screw 301, the proximity switch assembly 5 includes an upper proximity switch 501 and a lower proximity switch 502, the upper proximity switch 501 and the lower proximity switch 502 are fixedly installed on the top cover 2 at intervals, and in the initial state, the piston rod 3 is moved by the spring 4. Push to the bottom of the inner cavity 101 of the shell base 1, at this time, the lower proximity switch 502 in the proximity switch assembly 5 detects a signal, and the side of the shell base 1 is fixedly connected with an air pipe connector 6, and a vent 1011 is opened at the bottom of the inner cavity 101 in the shell base 1, and the vent 1011 is connected to the air pipe connector 6. The air pipe connector 6 can be connected to the air pressure chamber that needs to be detected inside the machine tool turntable through an air guide pipeline. If there is enough air pressure entering the inner cavity 101 of the shell base 1 through the air pipe connector 6 and the vent 1011, the piston rod 3 will move upward under pressure, and the spring 4 between the top cover 2 and the piston rod 3 will shrink. At this time, the signal of the lower proximity switch 502 in the proximity switch assembly 5 is disconnected, and the upper proximity switch 501 in the proximity switch assembly 5 detects a signal.

[0021] Among them, Figure 1 and Figure 2As shown, an O-ring 201 is fixedly installed on the outer side of the top cover 2, and the circumferential side of the O-ring 201 contacts the inner side wall of the shell seat 1, and the O-ring 201 can ensure the sealing between the shell seat 1 and the top cover 2. A piston rod seal 202 is fixedly installed on the inner side of the top cover 2, and the piston rod seal 202 is slidably sleeved on the outer side of the piston rod 3, and the piston rod seal 202 can ensure the sealing between the top cover 2 and the piston rod 3.

[0022] Among them, Figure 1 and Figure 3 As shown, the bottom side of the housing base 1 is provided with an assembly screw hole 102, and a fastening bolt 103 is threadedly connected through the assembly screw hole 102. There are two assembly screw holes 102, which are symmetrically distributed on the bottom side of the housing base 1, so as to achieve the purpose of stably fastening and assembling the housing base 1.

[0023] The working principle of this utility model:

[0024] During use, in the initial state, the spring 4 is used to push the piston rod 3 to the bottom of the inner cavity 101 of the shell seat 1. At this time, the lower proximity switch 502 in the proximity switch assembly 5 detects a signal, and the vent 1011 is connected to the air pipe joint 6. The air pipe joint 6 can be connected to the air pressure chamber that needs to be detected inside the machine tool turntable through the air guide pipeline. If there is sufficient air pressure entering the inner cavity 101 of the shell seat 1 through the air pipe joint 6 and the vent 1011, the piston rod 3 will move upward under pressure, and the spring 4 between the top cover 2 and the piston rod 3 will shrink. At this time, the signal of the lower proximity switch 502 in the proximity switch assembly 5 is disconnected, and the upper proximity switch 501 in the proximity switch assembly 5 detects a signal. The piston rod 3 can move up and down stably along the inner cavity 101 of the shell seat 1 and the top cover 2, and has good anti-interference ability. It can still move smoothly under external jitter. The proximity switch assembly 5 formed by the upper proximity switch 501 and the lower proximity switch 502 can make the detection signal stable even if there are liquids such as water and oil in the outside world.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of pressure switch used in a machine tool turntable, comprising a housing (1), characterized in that: An inner cavity (101) is provided in the shell seat (1), a top cover (2) is fixedly installed on the upper end of the shell seat (1), a piston rod (3) is slidably connected to the interior of the inner cavity (101), a hexagon socket screw (301) is threadedly connected to the upper end of the piston rod (3), the piston rod (3) slides through the end surface of the top cover (2), a spring (4) is fixedly connected between the top cover (2) and the piston rod (3), a proximity switch assembly (5) is provided on the top cover (2) at a side position close to the hexagon socket screw (301), a trachea joint (6) is fixedly connected to the side of the shell seat (1), a vent (1011) is provided in the shell seat (1) at the bottom of the inner cavity (101), and the vent (1011) is communicated with the trachea joint (6).

2. According to claim 1, a new type of pressure switch used for a machine tool turntable is characterized in that: The proximity switch assembly (5) comprises an upper proximity switch (501) and a lower proximity switch (502), and the upper proximity switch (501) and the lower proximity switch (502) are fixedly installed on the top cover (2) in an upper and lower interval manner.

3. According to claim 1, a new type of pressure switch used for a machine tool turntable is characterized in that: An O-type sealing ring (201) is fixedly mounted on the outer side of the top cover (2), and the peripheral side of the O-type sealing ring (201) contacts the inner side wall of the shell seat (1).

4. According to claim 1, a new type of pressure switch used for a machine tool turntable is characterized in that: A piston rod seal (202) is fixedly mounted on the inner side of the top cover (2), and the piston rod seal (202) is slidably sleeved on the outer side of the piston rod (3).

5. According to claim 1, a new type of pressure switch used for a machine tool turntable is characterized in that: The bottom side of the housing seat (1) is provided with an assembly screw hole (102), and a fastening bolt (103) is threadedly connected through the assembly screw hole (102).

6. According to claim 5, a new type of pressure switch used for a machine tool turntable is characterized in that: The number of the assembly screw holes (102) is two, and the two assembly screw holes (102) are symmetrically distributed on the bottom side of the housing seat (1).

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