Electromagnetic pump damping structure

Abstract

The utility model provides an electromagnetic pump damping structure, which relates to the technical field of electromagnetic pumps and comprises a shell, a top cover arranged at the top of the shell, a damping platform arranged in the shell, a limiting bottom plate arranged in the shell, an electromagnetic pump arranged at the top of the limiting bottom plate, and pipelines connected to two sides of the electromagnetic pump. And the damping assembly is arranged between the shell and the damping platform and used for conducting damping and abnormal working reminding on the electromagnetic pump, and the damping assembly comprises a spring a, a damper, a pressure sensor, an extrusion rod and a buzzer. According to the electromagnetic pump, through the arrangement of the damping assembly, damping can be conducted on the electromagnetic pump, meanwhile, an alarm can be triggered immediately when vibration of the electromagnetic pump exceeds a preset threshold value, a worker is warned that the electromagnetic pump works abnormally, and through the arrangement of the adjusting assembly, the size of the damping platform can be adjusted; and the damping platform can adapt to electromagnetic pumps of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic pumps, in particular to a shock absorbing structure of an electromagnetic pump. Background Art

[0002] An electromagnetic pump is a pump device that uses electromagnetic force to drive the flow of fluid. It is based on the principle of electromagnetism. Specifically, it uses the interaction between the magnetic field and the current passing through the conductive fluid. When the current passes through the fluid in the magnetic field, according to the principle of Lorentz force, the charged particles in the fluid will be subjected to a force perpendicular to the direction of the current and the magnetic field. This force causes the fluid to move. By controlling the intensity of the current, the pressure and flow rate of the fluid can be adjusted, thereby achieving precise control and pumping of the fluid. When the electromagnetic pump is working, it usually vibrates. In order to prevent and ensure the normal operation of the electromagnetic pump, a shock-absorbing platform is generally provided at the bottom of the electromagnetic pump for shock absorption.

[0003] However, the existing electromagnetic pump shock-absorbing structure still has certain defects when in use. For example, after long-term use of the electromagnetic pump, the internal parts of the electromagnetic pump, such as bearings, impellers, rotors, etc., may be worn, resulting in increased clearance and increased imbalance, thereby causing the vibration to intensify. The existing electromagnetic pump shock-absorbing structure only has a shock-absorbing function, and does not have the function of issuing an early warning when the vibration of the electromagnetic pump is abnormal. As a result, when the electromagnetic pump malfunctions, the staff cannot repair the electromagnetic pump in time, thereby causing damage to the electromagnetic pump. In addition, most electromagnetic pump shock-absorbing structures can only be matched with electromagnetic pumps of a specific size, and are not very applicable. Utility Model Content

[0004] The utility model aims to solve the shortcomings existing in the background technology and provides an electromagnetic pump shock-absorbing structure. In order to solve the above problems, the electromagnetic pump can be shock-absorbing through the setting of the shock-absorbing component. At the same time, the alarm can be immediately triggered when the vibration of the electromagnetic pump exceeds a preset threshold value to warn the staff that the electromagnetic pump is working abnormally, and the size of the shock-absorbing platform can be adjusted through the setting of the adjustment component so that the shock-absorbing platform can adapt to electromagnetic pumps of different sizes.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electromagnetic pump shock-absorbing structure, comprising: a shell, a top cover is provided on the top of the shell, a shock-absorbing platform is provided inside the shell, a limiting bottom plate is provided inside the shell, an electromagnetic pump is provided on the top of the limiting bottom plate, pipes are connected to both sides of the electromagnetic pump, and a shock-absorbing component is provided between the shell and the shock-absorbing platform, which is used to shock the electromagnetic pump and remind of abnormal working conditions, and the shock-absorbing component includes a spring a, a damper, a pressure sensor, an extrusion rod and a buzzer.

[0006] Furthermore, a plurality of threaded holes b are provided at the bottom of the shock absorbing platform, and a screw rod a is provided inside each of the threaded holes b. A plurality of connecting plates a are provided below the shock absorbing platform, and a positioning screw hole is provided on the top of each of the connecting plates a. The bottom end of the screw rod a passes through the positioning screw hole and is fixedly connected to a damper, and the bottom end of the damper is fixedly connected to a connecting plate b. A plurality of threaded holes a are provided at the bottom of the inner wall of the outer shell, and a screw rod b is fixedly connected to the bottom of the connecting plate b. An extrusion rod is fixedly connected to the bottom of the shock absorbing platform, a buzzer chamber is provided inside the outer shell, a pressure sensor is provided inside the buzzer chamber, a buzzer is provided inside the buzzer chamber, and a spring a is provided on the outer side of the damper. The setting of the damper can prevent the shock absorbing platform from shaking left and right when the spring is released.

[0007] Furthermore, the bottom end of the screw rod a is connected to the connecting plate a through the positioning screw hole, and the screw rod b is threadedly connected to the threaded hole a.

[0008] Furthermore, the buzzer is connected to the pressure sensor via an electric wire, and the bottom end of the extrusion rod extends into the buzzer chamber. Through the arrangement of the buzzer and the pressure sensor, the staff can be reminded when the electromagnetic pump vibrates abnormally.

[0009] Furthermore, an adjustment component is provided between the top cover and the shock absorbing platform, and the adjustment component includes: a slide groove opened at the top of the shock absorbing platform, two limiting threaded rods are provided inside the slide groove, two nuts are provided on the two limiting threaded rods, telescopic rods a are provided at the top of the two limiting threaded rods, one side of the telescopic rod a is fixedly connected to the limiting bottom plate, a support rod is provided at the bottom of the limiting bottom plate, a telescopic rod b is arranged above the limiting bottom plate, a telescopic cavity is provided at the bottom of the telescopic rod b, a compression cavity is provided inside the telescopic rod a, a compression spring is provided inside the compression cavity, and a spring is provided at the bottom of the telescopic rod b. There are multiple limiting holes on one side of the telescopic rod b, a limiting rod is provided on one side of the compression spring, one side of the telescopic rod b is fixedly connected to the limiting top plate, a moving cavity is provided on one side of the limiting top plate, a limiting groove is provided on the top of the limiting top plate, a limiting telescopic rod is arranged inside the moving cavity, a threaded sliding rod is provided on the top of the limiting telescopic rod, one end of the limiting telescopic rod protrudes from one side of the limiting top plate and is fixedly connected to the limiting plate, rubber shock-absorbing pads are provided on the top of the limiting bottom plate, one side of the limiting plate and the bottom of the limiting top plate, and the limiting rod and the limiting hole can be engaged with each other through the setting of the compression spring.

[0010] Furthermore, the top end of the telescopic rod a extends into the telescopic cavity, and one end of the limiting rod is engaged with the limiting hole.

[0011] Furthermore, the top end of the threaded sliding rod passes through the limiting groove and is slidably connected to the limiting groove, and the top end of the threaded sliding rod is threadedly connected with a nut.

[0012] The utility model provides an electromagnetic pump shock absorption structure, which has the following beneficial effects:

[0013] The utility model has the advantages that, through the setting of the shock-absorbing component, the electromagnetic pump can be damped, and an alarm can be immediately triggered when the vibration of the electromagnetic pump exceeds a preset threshold, which helps the operator to promptly understand that the equipment may be abnormal or is about to reach an unsafe operating state, so as to take measures in advance to avoid potential failures;

[0014] Secondly, by adjusting the setting of the components, the shock absorbing platform can be adjusted so that the shock absorbing platform can adapt to electromagnetic pumps of different sizes, thereby improving the applicability of the shock absorbing platform. At the same time, the spring can be replaced according to the weight of the electromagnetic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a sectional view of the overall structure of the utility model.

[0017] Figure 3 It is a side sectional view of the overall structure of the utility model.

[0018] Figure 4 This is a structural cross-sectional view of the telescopic rod b of the utility model.

[0019] Figure 5 It is a top view of the shock absorbing platform structure of the utility model.

[0020] Figure 6 It is a structural schematic diagram of the telescopic rod b of the utility model.

[0021] Figure 7 It is a structural schematic diagram of the connecting plate a of the present utility model.

[0022] Figure 8 For the utility model Figure 2 Enlarged view of point A.

[0023] Fig. 9 For the utility model Figure 3 Enlarged view of point B.

[0024] Fig.10 For the utility model Figure 3 Enlarged view of point C.

[0025] Figure 1-10In: 1. Shell; 101. Buzzer chamber; 102. Pressure sensor; 103. Buzzer; 104. Threaded hole a; 2. Top cover; 3. Shock-absorbing platform; 301. Threaded hole b; 302. Connecting plate a; 303. Screw a; 304. Spring a; 305. Damper; 306. Connecting plate b; 307. Screw b; 308. Extrusion rod; 309. Slide; 310. Positioning screw hole; 4. Electromagnetic pump; 5. Telescopic rod a; 501. Limiting threaded rod; 502. Telescopic rod b; 503. Telescopic cavity; 504. Limiting hole; 505. Compression cavity; 506. Compression spring; 507. Limiting rod; 6. Limiting bottom plate; 601. Support rod; 7. Limiting plate; 8. Limiting top plate; 801. Moving cavity; 802. Limiting groove; 803. Limiting telescopic rod; 804. Threaded sliding rod; 9. Pipeline. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0028] The embodiment of the present application provides an electromagnetic pump shock absorbing structure, which can achieve shock absorption of the electromagnetic pump through the setting of the shock absorbing component, and can also immediately trigger an alarm when the vibration of the electromagnetic pump exceeds a preset threshold, alerting the staff that the electromagnetic pump is working abnormally, and can adjust the size of the shock absorbing platform by adjusting the setting of the component, so that the shock absorbing platform can adapt to electromagnetic pumps of different sizes. The electromagnetic pump shock absorbing structure is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments.

[0029] The present application is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0030] See also Figure 1-10In the present embodiment, an electromagnetic pump shock-absorbing structure is provided, comprising: a shell 1, a top cover 2 is provided on the top of the shell 1, a shock-absorbing platform 3 is provided inside the shell 1, a limiting bottom plate 6 is provided inside the shell 1, an electromagnetic pump 4 is provided on the top of the limiting bottom plate 6, and pipes 9 are connected to both sides of the electromagnetic pump 4; a shock-absorbing component is provided between the shell 1 and the shock-absorbing platform 3, which is used to shock the electromagnetic pump 4 and remind of abnormal working conditions, and the shock-absorbing component comprises a spring a304, a damper 305, a pressure sensor 102, an extrusion rod 308 and a buzzer 103.

[0031] Furthermore, when the electromagnetic pump 4 is in normal use, the vibration generated by the electromagnetic pump 4 is transmitted to the shock absorbing platform 3, and then the vibration generated by the electromagnetic pump 4 is buffered by the spring a304 and the damper 305. When the vibration of the electromagnetic pump 4 intensifies, the violent vibration generated by the electromagnetic pump 4 drives the extrusion rod 308 to move downward, squeezing the pressure sensor 102, thereby causing the control buzzer 103 to emit an alarm sound, thereby reminding the staff that the electromagnetic pump 4 is working abnormally.

[0032] In some embodiments, a plurality of threaded holes b301 are provided at the bottom of the shock absorbing platform 3, and a screw a303 is provided inside each of the plurality of threaded holes b301. A plurality of connecting plates a302 are provided below the shock absorbing platform 3, and a positioning screw hole 310 is provided on the top of each of the plurality of connecting plates a302. The bottom end of the screw a303 passes through the positioning screw hole 310 and is fixedly connected to a damper 305. The bottom end of the damper 305 is fixedly connected to a connecting plate b306. A plurality of threaded holes a104 are provided at the bottom of the inner wall of the housing 1, and the bottoms of the plurality of connecting plates b306 are fixedly connected to screws b 307, an extrusion rod 308 is fixedly connected to the bottom of the shock absorbing platform 3, a buzzer chamber 101 is opened inside the shell 1, a pressure sensor 102 is arranged inside the buzzer chamber 101, a buzzer 103 is arranged inside the buzzer chamber 101, and a spring a304 is sleeved on the outer side of the damper 305; the bottom end of the screw a303 is connected to the connecting plate a302 through a positioning screw hole 310, and the screw b307 is threadedly connected to the threaded hole a104; the buzzer 103 is connected to the pressure sensor 102 through an electric wire, and the bottom end of the extrusion rod 308 extends into the buzzer chamber 101.

[0033] When the electromagnetic pump 4 is in normal use, the vibration generated by the electromagnetic pump 4 is transmitted to the shock absorbing platform 3 through the support rod 601, the telescopic rod a5 and the limiting threaded rod 501, and then transmitted to the compression spring a304 and the damper 305 through the shock absorbing platform 3. At this time, the vibration generated by the electromagnetic pump 4 is buffered by the spring a304 and the damper 305. When the internal parts of the electromagnetic pump 4 are worn, resulting in an increase in the gap, an increase in imbalance, and an increase in vibration, the violent vibration generated by the electromagnetic pump 4 will drive the extrusion rod 308 at the bottom of the shock absorbing platform 3 to move downward and squeeze the pressure sensor 102. After the pressure applied to the pressure sensor 102 by the extrusion rod 308 reaches a certain threshold, the pressure sensor 102 will generate an electrical signal and transmit the electrical signal to the control terminal, thereby controlling the buzzer 103 to turn on, causing the buzzer 103 to sound an alarm, thereby reminding the staff that the electromagnetic pump 4 is working abnormally.

[0034] Among them, the pressure sensor 102 is a piezoelectric pressure sensor, model 8507C-1. When external pressure acts on the sensor, the piezoelectric element inside the pressure sensor 102 is deformed, and thus corresponding charges are generated. These charges are detected and amplified through appropriate electronic circuits, and finally a voltage or current signal output proportional to the input pressure is obtained, thereby starting the buzzer 103, causing the buzzer 103 to sound an alarm. The pressure sensor 102 is a mature conventional technology in this technical field, and this solution does not make improvements to the circuit or program of the pressure sensor 102, so the circuit and signal connection relationship of the pressure sensor 402 is not repeated.

[0035] In some embodiments, an adjustment component is provided between the top cover 2 and the shock absorbing platform 3, and the adjustment component includes: a slide groove 309 opened at the top of the shock absorbing platform 3, two limiting threaded rods 501 are provided inside the slide groove 309, two nuts are provided on the two limiting threaded rods 501, and telescopic rods a5 are provided on the top of the two limiting threaded rods 501, one side of the telescopic rod a5 is fixedly connected to the limiting bottom plate 6, and a support rod 601 is provided at the bottom of the limiting bottom plate 6; a telescopic rod b502 is arranged above the limiting bottom plate 6, a telescopic cavity 503 is opened at the bottom of the telescopic rod b502, a compression cavity 505 is opened inside the telescopic rod a5, and a compression spring 506 is provided inside the compression cavity 505; a plurality of limiting holes 504 are opened on one side of the telescopic rod b502, a limiting rod 507 is provided on one side of the compression spring 506, one side of the telescopic rod b502 is fixedly connected to the limiting top plate 8, and one side of the limiting top plate 8 is opened A movable cavity 801 is provided, and a limiting groove 802 is provided on the top of the limiting top plate 8; a limiting telescopic rod 803 is arranged inside the movable cavity 801, and a threaded sliding rod 804 is provided on the top of the limiting telescopic rod 803, one end of the limiting telescopic rod 803 protrudes from one side of the limiting top plate 8 and is fixedly connected to the limiting plate 7, and rubber shock-absorbing pads are provided on the top of the limiting bottom plate 6, one side of the limiting plate 7 and the bottom of the limiting top plate 8. When it is necessary to replace the spring a304 according to the weight of the electromagnetic pump 4, the staff can screw multiple connecting plates b306 respectively before installing the electromagnetic pump 4 to remove the shock-absorbing platform 3, and then screw multiple connecting plates a302 respectively to remove the damper 305 and the spring a304, and finally, screw the connecting plate a302 to separate the connecting plate a302 from the screw a303. At this time, the spring a304 can be removed and replaced with a suitable spring a304.

[0036] Among them, the top end of the telescopic rod a5 extends into the telescopic cavity 503, and one end of the limiting rod 507 is engaged with the limiting hole 504; the top end of the threaded sliding rod 804 passes through the limiting groove 802 and is slidably connected with the limiting groove 802, and the top end of the threaded sliding rod 804 is threadedly connected with a nut.

[0037] During installation, it is necessary to adjust the shock absorbing platform 3 according to the specifications of the electromagnetic pump 4 so that the shock absorbing platform 3 can hold up electromagnetic pumps 4 of different specifications. The staff can take out the shell 1, then open the inspection door on one side of the shell 1, and screw the two nuts on the limiting threaded rod 501 to make the two nuts disengage from the shock absorbing platform 3, release the limit of the two limiting threaded rods 501, and pull the two limiting threaded rods 501 left and right along the slide groove 309, adjust the spacing between the two limiting threaded rods 501 to a suitable position according to the length of the electromagnetic pump 4, and then tighten the two nuts on the two limiting threaded rods 501 so that the two threads are close to the upper and lower surfaces of the shock absorbing platform 3, fix the limiting threaded rod 501 through the two nuts, and then press the limiting rod 507 on one side of the telescopic rod b502 to squeeze the compression spring 506, so that one end of the limiting rod 507 enters the telescopic cavity 503, and then pull the telescopic rod b502 upward or downward, and drive the limiting rod 507 to move forward through the telescopic rod b502. The top plate 8 is moved up or down, and then the limit top plate 8 and the limit bottom plate 6 are adjusted to a suitable position according to the height of the electromagnetic pump 4, and one end of the limit rod 507 is aligned with the limit hole 504. At this time, the compression spring 506 is released, so that the limit hole 504 and the limit rod 507 are engaged, thereby limiting the telescopic rod b502 and the limit top plate 8. Then the staff can loosen the nut on the threaded sliding rod 804 and pull the threaded sliding rod 804 along the limit groove 802 to limit the telescopic rod b502. 803 drives the limit plate 7 away from the telescopic rod b502, and then puts the electromagnetic pump 4 on the top of the limit bottom plate 6, and connects the two ends of the electromagnetic pump 4 to the pipe 9 respectively, and then pulls the limit groove 802 to make one side of the limit plate 7 close to the electromagnetic pump 4, and locks the nut on the threaded slide rod 804 to limit the electromagnetic pump 4, and then takes out the top cover 2, connects the outer shell 1 and the top cover 2 by connecting bolts and nuts, so that the shock absorbing platform 3 can hold up electromagnetic pumps 4 of different specifications.

[0038] In addition, a control panel is provided on one side of the housing 1, and the control panel can control the start and stop of the electromagnetic pump 4 and the buzzer 103, and the power of the device is provided by an external power supply function.

[0039] The control program involved in the present utility model can be implemented by those skilled in the art according to the same or similar principles in the prior art, and this part is not the innovation of the present utility model.

[0040] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] The above is a detailed introduction to an electromagnetic pump shock-absorbing structure provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electromagnetic pump damping structure, characterized in that: include: A housing (1), wherein a top cover (2) is provided on the top of the housing (1), a shock absorbing platform (3) is provided inside the housing (1), a limiting bottom plate (6) is provided inside the housing (1), an electromagnetic pump (4) is provided on the top of the limiting bottom plate (6), and pipelines (9) are connected to both sides of the electromagnetic pump (4); A shock absorbing component disposed between the housing (1) and the shock absorbing platform (3) is used to absorb shock to the electromagnetic pump (4) and to provide a warning of abnormal operation, wherein the shock absorbing component comprises a spring a (304), a damper (305), a pressure sensor (102), an extrusion rod (308) and a buzzer (103).

2. The electromagnetic pump damping structure according to claim 1, characterized in that: The bottom of the shock absorbing platform (3) is provided with a plurality of threaded holes b (301), each of the plurality of threaded holes b (301) is provided with a screw rod a (303), a plurality of connecting plates a (302) are provided below the shock absorbing platform (3), and a plurality of positioning screw holes (310) are provided on the top of each of the plurality of connecting plates a (302), the bottom end of the screw rod a (303) passes through the positioning screw hole (310) and is fixedly connected to a damper (305), and the bottom end of the damper (305) is fixedly connected to a connecting plate b (306) The bottom of the inner wall of the shell (1) is provided with a plurality of threaded holes a (104); the bottoms of the plurality of connecting plates b (306) are all fixedly connected with screw rods b (307); the bottom of the damping platform (3) is fixedly connected with an extrusion rod (308); a buzzer chamber (101) is provided inside the shell (1); a pressure sensor (102) is provided inside the buzzer chamber (101); a buzzer (103) is provided inside the buzzer chamber (101); and a spring a (304) is sleeved on the outer side of the damper (305).

3. The electromagnetic pump damping structure according to claim 2, characterized in that: The bottom end of the screw rod a (303) is connected to the connecting plate a (302) via the positioning screw hole (310), and the screw rod b (307) is threadedly connected to the threaded hole a (104).

4. The electromagnetic pump damping structure according to claim 2, characterized in that: The buzzer (103) is connected to the pressure sensor (102) via an electric wire, and the bottom end of the squeezing rod (308) extends into the interior of the buzzer chamber (101).

5. The electromagnetic pump damping structure according to claim 1, characterized in that: An adjustment component is provided between the top cover (2) and the shock absorbing platform (3), and the adjustment component comprises: A slide groove (309) is provided at the top of the shock absorbing platform (3), two limiting threaded rods (501) are provided inside the slide groove (309), two nuts are provided on the two limiting threaded rods (501), telescopic rods a (5) are provided at the top of the two limiting threaded rods (501), one side of the telescopic rod a (5) is fixedly connected to the limiting bottom plate (6), and a support rod (601) is provided at the bottom of the limiting bottom plate (6); A telescopic rod b (502) is arranged above the limiting bottom plate (6), a telescopic cavity (503) is provided at the bottom of the telescopic rod b (502), a compression cavity (505) is provided inside the telescopic rod a (5), and a compression spring (506) is provided inside the compression cavity (505); A plurality of limiting holes (504) are provided on one side of the telescopic rod b (502); a limiting rod (507) is provided on one side of the compression spring (506); one side of the telescopic rod b (502) is fixedly connected to a limiting top plate (8); one side of the limiting top plate (8) is provided with a moving cavity (801); and a limiting groove (802) is provided on the top of the limiting top plate (8); A limiting telescopic rod (803) is arranged inside the movable cavity (801), a threaded sliding rod (804) is provided on the top of the limiting telescopic rod (803), one end of the limiting telescopic rod (803) protrudes from one side of the limiting top plate (8) and is fixedly connected to the limiting plate (7), and rubber shock-absorbing pads are provided on the top of the limiting bottom plate (6), one side of the limiting plate (7) and the bottom of the limiting top plate (8).

6. The electromagnetic pump damping structure according to claim 5, characterized in that: The top end of the telescopic rod a (5) extends into the interior of the telescopic cavity (503), and one end of the limiting rod (507) is snap-fitted and connected to the limiting hole (504).

7. The electromagnetic pump damping structure according to claim 5, characterized in that: The top end of the threaded sliding rod (804) passes through the limiting groove (802) and is slidably connected to the limiting groove (802), and a nut is threadedly connected to the top end of the threaded sliding rod (804).

Images