A push rod structure for a push rod type electromagnetic relay

Abstract

This invention discloses a push rod structure for a push rod type electromagnetic relay, belonging to the technical field of electromagnetic relays. It includes a sliding electromagnetic relay mechanism, comprising a base and a housing. A mounting block is disposed within the housing. An iron core and a spiral coil are disposed in a groove on the upper side of the mounting block. A yoke is disposed near the iron core, and a mounting groove is disposed on the upper side of the yoke. A push rod driving mechanism is disposed above the yoke. The lower end of the pressure rod in the push rod driving mechanism is movably connected to the mounting groove. This invention achieves a technology that avoids contact contact by preventing deformation of the moving spring, thus avoiding fatigue wear caused by long-term deformation of the moving spring, increasing the service life of the electromagnetic relay, facilitating contact between contacts, reducing the probability of contact deviation, improving the accuracy of the relay control circuit, and making installation more convenient and quick, thereby improving the efficiency of relay assembly.

Description

Technical Field

[0001] This invention relates to the technical field of electromagnetic relays, specifically to a push rod structure for a push rod type electromagnetic relay. Background Technology

[0002] An electromagnetic relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. In fact, it is an "automatic switch" that uses the switching of low voltage and weak current circuits to control high voltage and strong current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in the circuit. The push rod structure is used to push the moving spring, so that the moving contact on the moving spring contacts the stationary contact on the stationary spring, forming an energized circuit.

[0003] In existing push rod structures for push rod type electromagnetic relays, such as the technical structure in application CN202122312460.6, the stationary spring structure mainly consists of a stationary spring assembly and a shunt plate. In the application structure of the electromagnetic relay, the shunt plate is arranged on the side of the stationary spring assembly opposite to the moving spring assembly. The current-collecting end of the shunt plate is electrically connected to the stationary spring assembly. Before the contact overtravel state, the stationary spring assembly forms a clearance fit with the current-leading end of the shunt plate. During the contact overtravel state, the stationary spring assembly forms a gap fit with the current-leading end of the shunt plate. The relay's internal actuation structure causes the moving spring assembly to deform, bringing the two contacts into contact and forming a circuit. However, long-term deformation of the moving spring can lead to fatigue wear and breakage. Furthermore, the installation process requires high precision in controlling the trajectory of the moving contact driven by the deformation of the moving spring, making installation difficult. Otherwise, after the moving spring deforms, the moving contact may not be able to make proper contact with the stationary contact. Moreover, long-term wear and tear of the moving spring can cause deviations when the two contact points are aligned, preventing normal operation and posing certain safety hazards. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic by providing a solution that is significantly different from existing technologies. Specifically, the present invention mainly provides a push rod structure for a push rod type electromagnetic relay to solve the technical problems mentioned in the background.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] A push rod structure for a push rod type electromagnetic relay includes a sliding electromagnetic relay mechanism. The sliding electromagnetic relay mechanism includes a base and a housing. The housing is located on the upper surface of the base. A mounting block is disposed inside the housing. The lower side of the outer wall of the mounting block is connected to the upper side of the base. An iron core and a spiral coil wound on the iron core are disposed in a groove on the upper side of the mounting block. A yoke is disposed near the iron core and is located on one side of the upper surface of the mounting block. A mounting groove is disposed on the upper side of the yoke, and a first spring is disposed in the mounting groove. A push rod driving mechanism is disposed above the yoke. The push rod driving mechanism includes an L-shaped armature and a support block. A pressure rod is disposed on the lower side of the horizontal part of the L-shaped armature, and the lower end of the pressure rod is movably connected to the mounting groove.

[0007] The sliding electromagnetic relay mechanism has two first stationary supports and two second stationary supports on one side of the upper surface of the base, and a movable support located between the first stationary supports and the second stationary supports. Each first stationary support is provided with a first stationary end piece, and each first stationary end piece is provided with a first stationary contact on the side near the movable support. Each second stationary support is provided with a second stationary end piece, and each second stationary end piece is provided with a second stationary contact on the side near the movable support. The movable support is provided with two movable end pieces, and the two movable end pieces are connected to each other. Each movable end piece is provided with movable contacts on both sides. The bottom of the movable support is provided with two limiting sliders, and each limiting slider is slidably connected to a limiting groove, which is provided on the upper surface of the base.

[0008] The vertical portion of the L-shaped armature in the push rod drive mechanism has a rectangular opening on its lower side. A connecting rod is provided on the upper side of the inner wall of the rectangular opening. A first trapezoidal block is provided at the lower end of the connecting rod. The first trapezoidal block is located at the opening of the support block. A placement groove is provided inside the support block. A push rod is movably connected inside the placement groove. One end of the push rod is connected to one side of the moving bracket. A second spring and a limiting block at one end of the second spring are provided on the push rod. The limiting block is provided on the push rod. A connecting block is provided at the other end of the push rod. A second trapezoidal block is provided on the connecting block.

[0009] Preferably, rectangular sliders are provided on both sides of the outer wall of the connecting block, and each rectangular slider is slidably connected to a rectangular groove, with two rectangular grooves respectively provided on both sides of the inner wall of the support block.

[0010] Preferably, two threaded seats are provided at the bottom of the support block. The lower side of each threaded seat is connected to the base by bolts. Each threaded seat is engaged with a threaded post and a nut on the threaded post. The upper end of each threaded post is engaged with the lower side of the outer wall of the support block.

[0011] Preferably, each of the first and second static supports is provided with a first insert and a second insert at its lower end, and both the first insert and the second insert pass through the opening on the base.

[0012] Preferably, right-angle brackets are provided at both edges of one side of the outer wall of the support block, and each right-angle bracket is connected to the outer wall of the yoke by bolts.

[0013] Preferably, both ends of the spiral coil are provided with pins.

[0014] Preferably, the base and the outer casing are connected by bolts.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] (1) The present invention realizes the working mode of setting normally closed contacts and normally open contacts in the housing by setting a base, housing, mounting block, iron core, spiral coil, yoke, first spring, first static support, second static support and moving support. The mutual cooperation between the limiting slider and the limiting groove at the bottom of the moving support limits the moving contact to only move back and forth linearly, avoiding the technology of contact contact by the deformation of the moving spring, avoiding fatigue wear of the moving spring due to long-term deformation, and improving the service life of the electromagnetic relay.

[0017] (2) The present invention, through the setting of L-shaped armature, pressure rod, support block, placement groove, connecting rod, first trapezoidal block, push rod, second spring, limit block, connecting block and second trapezoidal block, realizes that after the spiral coil is energized, the L-shaped armature moves down and compresses the first spring. At the same time, the first trapezoidal block moves down and squeezes the second trapezoidal block to the right. The second spring is compressed and pushes the moving bracket to move towards the second stationary bracket, so that the moving contact moves linearly to the second stationary contact. The arc trajectory of the traditional moving contact is changed to a linear trajectory, which facilitates the contact between the contacts, reduces the probability of deviation when the contacts are in contact, and improves the accuracy of the relay control circuit. In addition, the height of the support block can be adjusted by the mutual cooperation between the threaded seat, threaded column and nut to adapt to the movement range of the L-shaped armature, which facilitates the installation. It does not need to consider the arc trajectory formed by the deformation of the traditional moving spring to drive the moving contact, which reduces the installation difficulty of the stationary contact position, making the installation more convenient and faster, and improving the work efficiency of relay assembly.

[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the outer shell and base structure of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the internal structure of the outer shell of the present invention;

[0022] Figure 4 This is a schematic diagram of the L-shaped armature and support block structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the static and dynamic support structures of the present invention;

[0024] Figure 6 for Figure 3 Enlarged diagram of area A.

[0025] Figure Descriptions: 1. Sliding electromagnetic relay mechanism; 11. Base; 12. Housing; 13. Mounting block; 14. Iron core; 141. Helical coil; 15. Yoke; 151. Mounting groove; 16. First spring; 17. First stationary support; 171. First stationary end piece; 172. First stationary contact; 18. Second stationary support; 181. Second stationary end piece; 182. Second stationary contact; 19. Moving support; 191. Moving end piece; 192. Moving contact; 193. Limiting slider; 194. Limiting groove;

[0026] 2. Push rod drive mechanism; 21. L-shaped armature; 211. Rectangular opening; 22. Pressure rod; 23. Support block; 231. Right-angle bracket; 232. Placement slot; 233. Rectangular slide; 24. Connecting rod; 25. First trapezoidal block; 26. Push rod; 261. Second spring; 262. Limiting block; 27. Connecting block; 271. Rectangular slider; 28. Second trapezoidal block; 29. ​​Threaded seat; 291. Threaded post; 292. Nut;

[0027] 3. Pin; 4. First insert; 5. Second insert. Detailed Implementation

[0028] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Example 1, please refer to the appendix for details. Figure 1-6As shown, a push rod structure for a push rod type electromagnetic relay includes a sliding electromagnetic relay mechanism 1. The sliding electromagnetic relay mechanism 1 includes a base 11 and a housing 12. The housing 12 is located on the upper surface of the base 11. A mounting block 13 is disposed inside the housing 12. The lower side of the outer wall of the mounting block 13 is connected to the upper side of the base 11. An iron core 14 and a spiral coil 141 wound on the iron core 14 are disposed in a groove on the upper side of the mounting block 13. A yoke 15 is disposed near the iron core 14 and is located on the upper surface of the mounting block 13. A mounting groove 151 is disposed on the upper side of the yoke 15, and a first spring is disposed in the mounting groove 151. Spring 16, a push rod drive mechanism 2 is provided above the yoke 15, the push rod drive mechanism 2 includes an L-shaped armature 21 and a support block 23, a pressure rod 22 is provided on the lower side of the horizontal part of the L-shaped armature 21, and the lower end of the pressure rod 22 is movably connected to the mounting groove 151; two first static supports 17 and two second static supports 18 are provided on one side of the upper surface of the base 11 in the sliding electromagnetic relay mechanism 1, and a moving support 19 is located between the first static supports 17 and the second static supports 18. Each first static support 17 is provided with a first static end piece 171, and each first static end piece 171 is provided with a first static contact 172 on the side near the moving support 19. Each of the second stationary supports 18 is provided with a second stationary end piece 181, and each second stationary end piece 181 is provided with a second stationary contact 182 on the side near the moving support 19. The stationary support and the stationary end piece constitute a stationary spring. The moving support 19 is provided with two moving end pieces 191, and the two moving end pieces 191 are connected to each other. The moving support 19 and the moving end pieces 191 constitute a moving spring. Each moving end piece 191 is provided with moving contacts 192 on both sides. The bottom of the moving support 19 is provided with two limiting sliders 193, and each limiting slider 193 is slidably connected to a limiting groove 194. The limiting groove 194 is provided on the upper surface of the base 11. The vertical L-shaped armature 21 in the push rod drive mechanism 2 A rectangular opening 211 is provided on the lower side of the straight section. A connecting rod 24 is provided on the upper side of the inner wall of the rectangular opening 211. A first trapezoidal block 25 is provided at the lower end of the connecting rod 24. The first trapezoidal block 25 is located at the opening of the support block 23. A placement groove 232 is provided in the support block 23. A push rod 26 is movably connected in the placement groove 232. One end of the push rod 26 is connected to one side of the movable bracket 19. A second spring 261 and a limiting block 262 at one end of the second spring 261 are provided on the push rod 26. The limiting block 262 is provided on the push rod 26. A connecting block 27 is provided at the other end of the push rod 26. A second trapezoidal block 28 is provided on the connecting block 27.

[0032] The above structure, through the cooperation between the sliding electromagnetic relay mechanism 1 and the push rod drive mechanism 2, achieves the technology of avoiding contact contact by avoiding deformation of the moving spring, avoiding fatigue wear of the moving spring due to long-term deformation, and improving the service life of the electromagnetic relay. It changes the arc-shaped trajectory of the moving contact 192 to a linear trajectory, which facilitates contact between contacts, reduces the probability of deviation when the contacts are in contact, improves the accuracy of the relay control circuit, and eliminates the need to consider the arc-shaped trajectory of the moving contact 192 during installation, reducing the installation difficulty and making installation more convenient and faster, thus improving the work efficiency of relay assembly.

[0033] The specific operation is as follows: First, check whether any components within the device are damaged. After ensuring there is no damage, connect a low-voltage power supply between the two pins 3. The spiral coil 141 is energized, thereby generating an attractive force on the L-shaped armature 21 by the spiral coil 141 and the iron core 14. This causes the L-shaped armature 21 to move downward, compressing the first spring 16 through the pressure rod 22. At the same time, the connecting rod 24 drives the first trapezoidal block 25 to move downward, squeezing the second trapezoidal block 28 and giving the second trapezoidal block 28 a rightward component force, causing the push rod 26 to move downward. The moving bracket 19 moves to the right, compressing the second spring 261 through the limiting block 262, and pushing the moving bracket 19 to move along the limiting slide groove 194 towards the second stationary bracket 18 until the moving contact 192 contacts the second stationary contact 182. With the cooperation of the second insert 5, a closed circuit of the working circuit is formed. After the low voltage power supply is disconnected, the downward attraction force on the L-shaped armature 21 disappears, and then the first spring 16 and the second spring 261 are restored to their original positions, so that the connection between the second stationary contact 182 and the moving contact 192 is broken, forming an open circuit.

[0034] Example 2, please refer to the appendix for details. Figure 2 , 3 As shown in Figure 4, right-angle brackets 231 are provided at both edges of one side of the outer wall of the support block 23. Each right-angle bracket 231 is connected to the outer wall of the yoke 15 by bolts. The right-angle brackets 231 are used to position one side of the support block 23 on the outer wall of the yoke 15. Both ends of the spiral coil 141 are provided with pins 3. The spiral coil 141 is connected to the control circuit by the pins 3. The base 11 and the outer shell 12 are connected by bolts, which facilitates the installation and disassembly of the outer shell 12 and the base 11.

[0035] Example 3, please refer to the appendix for details. Figure 5 and 6As shown, rectangular sliders 271 are provided on both sides of the outer wall of the connecting block 27. Each rectangular slider 271 is slidably connected to a rectangular groove 233. The two rectangular grooves 233 are respectively provided on both sides of the inner wall of the support block 23. Through the mutual cooperation between the rectangular sliders 271, the rectangular grooves 233 and the connecting block 27, the second trapezoidal block 28 is constrained, so that the second trapezoidal block 28 can only move to the right under the action of the first trapezoidal block 25. Two threaded seats 29 are provided at the bottom of the support block 23. The lower side of each threaded seat 29 is connected to the base 11 by bolts. Each seat 29 is engaged with a threaded post 291 and a nut 292 on the threaded post 291. The upper end of each threaded post 291 is engaged with the lower side of the outer wall of the support block 23. Through the cooperation between the threaded seat 29, the threaded post 291 and the nut 292, the height of the support block 23 can be adjusted to accommodate the movement range of the L-shaped armature 21. Each of the first static brackets 17 and the second static brackets 18 is provided with a first insert 4 and a second insert 5 at its lower end. The first insert 4 and the second insert 5 both pass through the opening on the base 11. The connection with the working circuit is realized through the first insert 4 and the second insert 5.

[0036] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A push rod structure for a push rod type electromagnetic relay, comprising a sliding electromagnetic relay mechanism (1), characterized in that, The sliding electromagnetic relay mechanism (1) includes a base (11) and a housing (12). The housing (12) is located on the upper surface of the base (11). A mounting block (13) is provided inside the housing (12). The lower side of the outer wall of the mounting block (13) is connected to the upper side of the base (11). An iron core (14) is provided in the groove on the upper side of the mounting block (13), and a spiral coil (141) wound on the iron core (14) is provided. A yoke (15) is provided on the side close to the iron core (14). The yoke (15) is located on one side of the upper surface of the mounting block (13). The upper side of the yoke (15) is provided with a mounting groove (151), and a first spring (16) is provided in the mounting groove (151). A push rod drive mechanism (2) is provided above the yoke (15). The push rod drive mechanism (2) includes an L-shaped armature (21) and a support block (23). A pressure rod (22) is provided on the lower side of the horizontal part of the L-shaped armature (21). The lower end of the pressure rod (22) is movably connected to the mounting groove (151). The sliding electromagnetic relay mechanism (1) has two first stationary supports (17) and two second stationary supports (18) on one side of the upper surface of the base (11), and a moving support (19) located between the first stationary supports (17) and the second stationary supports (18). Each first stationary support (17) is provided with a first stationary end piece (171), and each first stationary end piece (171) is provided with a first stationary contact (172) on the side near the moving support (19). Each second stationary support (18) is provided with a second stationary end piece (181). Each second stationary end piece (181) is provided with a second stationary contact (182) on the side near the moving bracket (19). The moving bracket (19) is provided with two moving end pieces (191) and the two moving end pieces (191) are connected to each other. Each moving end piece (191) is provided with a moving contact (192) on both sides. The bottom of the moving bracket (19) is provided with two limiting sliders (193). Each limiting slider (193) is slidably connected to a limiting groove (194). The limiting groove (194) is provided on the upper surface of the base (11). The vertical part of the L-shaped armature (21) in the push rod drive mechanism (2) is provided with a rectangular opening (211) on the lower side. A connecting rod (24) is provided on the upper side of the inner wall of the rectangular opening (211). A first trapezoidal block (25) is provided at the lower end of the connecting rod (24). The first trapezoidal block (25) is located at the opening of the support block (23). A placement groove (232) is provided in the support block (23). A push rod (26) is movably connected in the placement groove (232). One end of the push rod (26) is connected to one side of the moving bracket (19). A second spring (261) is provided on the push rod (26), and a limiting block (262) is provided at one end of the second spring (261). The limiting block (262) is provided on the push rod (26). A connecting block (27) is provided at the other end of the push rod (26). A second trapezoidal block (28) is provided on the connecting block (27).

2. The push rod structure for a push rod type electromagnetic relay according to claim 1, characterized in that, The connecting block (27) has rectangular sliders (271) on both sides of its outer wall. Each rectangular slider (271) is slidably connected to a rectangular groove (233). The two rectangular grooves (233) are respectively located on both sides of the inner wall of the support block (23).

3. The push rod structure for a push rod type electromagnetic relay according to claim 2, characterized in that, Two threaded seats (29) are provided at the bottom of the support block (23). The lower side of each threaded seat (29) is connected to the base (11) by bolts. Each threaded seat (29) is engaged with a threaded post (291) and a nut (292) on the threaded post (291). The upper end of each threaded post (291) is engaged with the lower side of the outer wall of the support block (23).

4. The push rod structure for a push rod type electromagnetic relay according to claim 1, characterized in that, Each of the first static bracket (17) and the second static bracket (18) is provided with a first insert (4) and a second insert (5) at its lower end, and the first insert (4) and the second insert (5) both pass through the opening on the base (11).

5. The push rod structure for a push rod type electromagnetic relay according to claim 3, characterized in that, Right-angle brackets (231) are provided at two edges on one side of the outer wall of the support block (23), and each right-angle bracket (231) is connected to the outer wall of the yoke (15) by bolts.

6. The push rod structure for a push rod type electromagnetic relay according to claim 1, characterized in that, Both ends of the spiral coil (141) are provided with pins (3).

7. The push rod structure for a push rod type electromagnetic relay according to claim 4, characterized in that, The base (11) and the outer shell (12) are connected by bolts.

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