Variable-diameter pressure plate applied to pressure plate pump

Abstract

The utility model discloses a variable-diameter pressure plate applied to a pressure plate pump. A supporting disc, a first annular boss, a second annular boss and a third annular boss are integrally formed, the first annular boss is located on the inner side of the second annular boss, and a rubber sealing ring is arranged on the outer side of the second annular boss in a sleeving mode and arranged on the supporting disc; the pressure plate check ring is fixed to the top end of the second annular boss and makes contact with the top end of the rubber sealing ring, and a gasket is arranged between the pressure plate check ring and the rubber sealing ring. The cam disc and the first annular boss form a rotating pair. The driving motor drives an arc-shaped rack on the outer side of the cam disc through a gear; the inner end of each push rod and one cam on the outer side of the cam disc form a cam pair, the middle of each push rod and one hole of the second annular boss form a sliding pair, and an arc-shaped plate at the outer end of each push rod is tightly attached to the inner side of the rubber sealing ring. According to the pressure plate, the outer diameter of the rubber sealing ring can be changed, so that a pressure plate pump using the pressure plate can be suitable for operation of a conical barrel.

Description

Technical Field

[0001] The utility model belongs to the field of fluid transmission, and particularly relates to a variable-diameter pressure plate applied to a pressure plate pump. Background Art

[0002] As an important fluid transmission device, the pressure plate pump is widely used in various lubrication and oil supply systems because of its simple working principle, high working efficiency, etc., and can meet the requirements under different working environments and conditions.

[0003] In industrial production, the pressure plate pump is mainly used to extract liquid goods from cylindrical steel drums. Many cylindrical steel drums will be recycled by manufacturers after one use. However, due to their structural characteristics, the empty drums occupy a large space during recycling and the transportation cost is high. These transportation problems have always been difficult to solve. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and propose a variable-diameter pressure plate applied to a pressure plate pump.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A variable-diameter pressure plate applied to a pressure plate pump of the utility model includes a support plate, a variable-diameter component, a driving component, a pressure plate retaining ring, a gasket and a rubber sealing ring.

[0007] The horizontally arranged support plate is provided with a central hole, and a ring-shaped boss one integrally formed is provided at the outer edge of the central hole at the top end, and a ring-shaped boss two integrally formed is provided outside the ring-shaped boss one. A ring-shaped boss three integrally formed is provided at the top end of the ring-shaped boss one. The central axes of the support plate, the ring-shaped boss one, the ring-shaped boss two and the ring-shaped boss three are coaxially arranged; the rubber sealing ring is sleeved outside the ring-shaped boss two and placed on the support plate; the pressure plate retaining ring is fixed at the top end of the ring-shaped boss two and contacts the top end of the rubber sealing ring, and a gasket is provided between the pressure plate retaining ring and the rubber sealing ring.

[0008] The variable-diameter component includes a cam disk and a push rod; the cam disk is sleeved outside the ring-shaped boss one and forms a rotating pair with the ring-shaped boss one; an arc-shaped rack integrally formed and coaxially arranged is provided outside the cam disk, and a plurality of cams integrally formed and equidistantly arranged along the circumferential direction are provided; a plurality of radially arranged push rods are provided, and the number of the push rods equidistantly arranged along the circumferential direction is equal to the number of the cams. The inner end of each push rod forms a cam pair with a cam, the middle part passes through a hole opened on the ring-shaped boss two and forms a sliding pair with the corresponding hole, and an arc-shaped plate integrally formed is provided at the outer end, and the arc-shaped plate contacts the inner side of the rubber sealing ring. The driving component includes a driving motor and a gear; the driving motor is fixed to both the ring-shaped boss one and the pressure plate retaining ring and drives the gear to rotate, and the gear meshes with the arc-shaped rack.

[0009] Preferably, a vertically arranged sleeve is integrally formed on the first annular boss, and both ends of the housing of the driving motor are fixed to the sleeve and the pressure plate retaining ring through the first bolt and the second bolt respectively.

[0010] Preferably, a plurality of annular grooves are uniformly arranged along the axial direction on the inner side wall of the cam disc.

[0011] Preferably, in the initial state where the rubber sealing ring is not deformed, each push rod is at the innermost end, and the sum of the outer arc lengths of all the arc-shaped plates is equal to the inner circumference of the rubber sealing ring.

[0012] Preferably, the width of the arc-shaped plate is equal to the distance between the gasket and the support disc.

[0013] More preferably, a plurality of tooth grooves are arranged along the arc on both the upper and lower parts of the arc-shaped plate to form a plurality of comb teeth.

[0014] Preferably, a hemispherical body is integrally formed at the inner end of the push rod, and a point contact is formed between the hemispherical body and the corresponding cam.

[0015] Preferably, let half of the difference between the outer diameter of the support disc and the inner diameter of the rubber sealing ring be a, half of the difference between the outer diameter of the gasket and the inner diameter of the rubber sealing ring be b, and the displacement of the push rod be c, then a > c and b > c.

[0016] The utility model has the following beneficial effects:

[0017] 1. In view of the fact that the diameters corresponding to different heights inside the conical barrel are different, the pressure plate of the utility model can realize the change of the outer diameter of the rubber sealing ring, and the range of the outer diameter change is large, so that the side of the pressure plate is always in close contact with the barrel wall of the conical barrel, and the sealing performance is strong. Therefore, the pressure plate pump using the utility model can be applied to the operation of the conical barrel to pump out the liquid in the conical barrel. In this way, the manufacturer can choose to use a conical barrel that is more convenient for transporting empty barrels to store the liquid. Specifically, the utility model drives the gear to rotate forward or backward through the driving motor, so that the gear drives the cam disc to rotate backward or forward through the arc-shaped rack. During the operation of the pressure plate pump using the utility model on the conical barrel, when the support disc enters the barrel mouth of the conical barrel, the cam disc rotates backward, and each cam on the cam disc pushes each push rod to drive each arc-shaped plate to move outward, and each arc-shaped plate pushes the rubber sealing ring to expand outward, so that the outer diameter of the rubber sealing ring increases, and the outer side of the rubber sealing ring is closely attached to the inner wall of the barrel mouth of the conical barrel. When the support disc moves downward inside the conical barrel, the cam disc rotates forward, and the restoring force of the rubber sealing ring pushes each push rod to move inward through each arc-shaped plate. The outer diameter of the rubber sealing ring decreases, but the outer side of the rubber sealing ring is always closely attached to the inner wall of the barrel mouth of the conical barrel. Furthermore, the change of the outer diameter of the rubber sealing ring is realized, and the pressure plate pump using the utility model can be applied to the operation of the conical barrel.

[0018] 2. The utility model adopts a driving motor to drive the cam disc to rotate, and then pushes the push rod to move back and forth to achieve variable diameter. The transmission is simple, efficient, accurate, and highly controllable.

[0019] 3. The comb teeth on the arc plate at the outer end of the push rod in the utility model can not only ensure that the action height of the arc plate inside the rubber sealing ring reaches the maximum, but also reduce the contact area between the arc plate and the gasket and the support disc, making the push rod and the arc plate move flexibly. Brief Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 is Figure 1 an enlarged view of part A in

[0022] Figure 3 is Figure 1 a top view after removing the gasket;

[0023] Figure 4 is a schematic diagram of the structure of the cam disc in the utility model;

[0024] Figure 5 is a schematic diagram of the structure of the push rod in the utility model. Detailed Description of the Preferred Embodiment

[0025] The following further describes the utility model with reference to the drawings.

[0026] As Figure 1 shown, a variable-diameter pressure plate applied to a pressure plate pump in the utility model includes a support disc 1, a variable-diameter assembly 2, a drive assembly 3, a pressure plate retaining ring 4, a gasket 5, and a rubber sealing ring 6; the rubber sealing ring 6 can adopt the structural form of a bicycle inner tube.

[0027] The horizontally arranged support disc 1 is provided with a central hole, and at the top, an integrally formed first annular boss is provided at the outer edge of the central hole, and a second annular boss is integrally formed outside the first annular boss. A third annular boss is integrally formed at the top of the first annular boss. The central axes of the support disc 1, the first annular boss, the second annular boss, and the third annular boss are coaxially arranged. The rubber sealing ring 6 is sleeved outside the second annular boss and placed on the support disc 1; the pressure plate retaining ring 4 is fixed to the top of the second annular boss (which can be connected by threads), and contacts the top of the rubber sealing ring 6. A gasket 5 is provided between the pressure plate retaining ring 4 and the rubber sealing ring 6. The pressure plate retaining ring 4 and the support disc 1 axially limit the rubber sealing ring 6, but the pressure plate retaining ring 4 does not press the rubber sealing ring 6 tightly, ensuring that the rubber sealing ring 6 can expand or retract smoothly; the outer diameter of the rubber sealing ring 6 is larger than the outer circular surface diameters of the support disc 1 and the gasket 5.

[0028] As shown Figure 3 , Figure 4 and Figure 5 shown, the variable-diameter component 2 includes a cam disk 13 and a push rod 12; the cam disk 13 is sleeved outside the first annular boss and forms a rotating pair with the first annular boss; an integrally formed and coaxially arranged arc-shaped rack is provided on the outside of the cam disk 13, and a plurality of cams integrally formed and arranged at equal intervals in the circumferential direction are provided; a plurality of radially arranged push rods 12 are provided, and the number of the push rods 12 arranged at equal intervals in the circumferential direction is equal to the number of the cams. The inner end of each push rod 12 forms a cam pair with a cam, the middle part passes through a hole opened on the second annular boss and forms a sliding pair with the corresponding hole, and an integrally formed arc-shaped plate is provided at the outer end, and the arc-shaped plate contacts the inner side of the rubber sealing ring 6 to increase the contact area between the push rod 12 and the rubber sealing ring 6. As shown Figure 2 shown, the driving component 3 includes a driving motor 8 and a gear 10; the driving motor 8 is fixed to both the first annular boss and the pressure plate retaining ring 4, drives the gear 10 to rotate, and the gear 10 meshes with the arc-shaped rack.

[0029] As a preferred embodiment, a vertically arranged sleeve 11 is integrally formed on the first annular boss, and both ends of the housing of the driving motor 8 are fixed to the sleeve 11 and the pressure plate retaining ring 4 respectively, and the fixing method is connected by a first bolt 7 and a second bolt 9.

[0030] As a preferred embodiment, a plurality of annular grooves are uniformly arranged along the axial direction on the inner side wall of the cam disk 13, and the annular grooves are used to reduce the friction area between the cam disk 13 and the first annular boss.

[0031] As a preferred embodiment, in the initial state where the rubber sealing ring 6 is not deformed, each push rod 12 is at the innermost end, and the sum of the outer arc lengths of all the arc-shaped plates is equal to the inner circumference of the rubber sealing ring 6, further increasing the contact area between the push rod 12 and the rubber sealing ring 6. However, it should be noted that Figure 3 Figure 18 shows another embodiment in which the sum of the outer arc lengths of all the arc-shaped plates is less than the inner circumference of the rubber sealing ring 6.

[0032] As a preferred embodiment, the width of the arc-shaped plate is equal to the distance between the gasket 5 and the support disk 1.

[0033] More preferably, a plurality of tooth grooves are provided along the arc on the upper and lower parts of the arc-shaped plate to form a plurality of comb teeth. In this way, while ensuring that the acting height of the arc-shaped plate on the inner side of the rubber sealing ring 6 reaches the maximum (the width of the arc-shaped plate is equal to the distance between the gasket 5 and the support disk 1, which is the maximum width that can be achieved, and at this time the acting height on the inner side of the rubber sealing ring 6 reaches the maximum), the contact area between the arc-shaped plate and the gasket 5 and the support disk 1 can also be reduced.

[0034] As a preferred embodiment, a hemispherical body is integrally formed at the inner end of the push rod 12, and a point contact is formed between the hemispherical body and the corresponding cam, facilitating the cam to push out the push rod 12.

[0035] The working principle of a variable-diameter pressure plate of the utility model applied to a pressure plate pump is as follows:

[0036] Using the utility model to replace the pressure plate of a traditional pressure plate pump, fix the top end of the annular boss III to the bottom end of the pump body of the pressure plate pump, and make the central hole of the annular boss III communicate with the inlet of the pump body. During the operation of the pressure plate pump of the utility model on a conical barrel, lower the support plate 1 until it enters the mouth of the conical barrel, then drive the motor 8 to drive the gear 10 to rotate forward. The gear 10 meshes with the arc-shaped rack, thereby driving the cam disk 13 to rotate reversely. Each cam on the cam disk 13 pushes the corresponding push rod 12 to move outward. The arc-shaped plates on the push rods 12 push the rubber sealing ring 6 to expand outward, and thus the outer diameter of the rubber sealing ring 6 increases, making the outer side of the rubber sealing ring 6 fit against the inner wall of the mouth of the conical barrel. Then, the support plate 1 moves downward inside the conical barrel, and at the same time, the drive motor 8 drives the gear 10 to rotate reversely, thereby driving the cam disk 13 to rotate forward. The restoring force of the rubber sealing ring 6 pushes each arc-shaped plate to drive each push rod 12 to move inward, and the outer diameter of the rubber sealing ring 6 also decreases synchronously, and the outer side of the rubber sealing ring 6 always closely adheres to the inner wall of the conical barrel. Therefore, it can realize the change of the outer diameter of the rubber sealing ring 6, enabling the pressure plate pump of the utility model to operate on the conical barrel and pump out the liquid in the conical barrel. Among them, let half of the difference between the outer circle diameter of the support plate 1 and the inner diameter of the rubber sealing ring 6 be a, half of the difference between the outer circle diameter of the gasket 5 and the inner diameter of the rubber sealing ring 6 be b, and the displacement of the push rod 12 be c. Then a > c and b > c, ensuring that the rubber sealing ring 6 will not fall off between the gasket 5 and the support plate 1 after expanding outward.

Claims

1. A variable-diameter pressure plate applied to a pressure plate pump, comprising a support plate, a pressure plate retaining ring, a gasket and a rubber sealing ring, characterized in that: It further includes a variable-diameter component and a driving component; the horizontally arranged support disc is provided with a central hole, and at the outer edge of the central hole at the top, there is an integrally formed first annular boss, and outside the first annular boss, there is an integrally formed second annular boss. At the top of the first annular boss, there is an integrally formed third annular boss. The central axes of the support disc, the first annular boss, the second annular boss, and the third annular boss are coaxially arranged; the rubber sealing ring is sleeved outside the second annular boss and placed on the support disc; the pressure plate retaining ring is fixed at the top of the second annular boss and contacts the top of the rubber sealing ring, and there is a gasket between the pressure plate retaining ring and the rubber sealing ring. The variable-diameter component includes a cam disc and a push rod; the cam disc is sleeved outside the first annular boss and forms a rotating pair with the first annular boss; on the outside of the cam disc, there is an integrally formed and coaxially arranged arc-shaped rack, and there are a plurality of integrally formed cams arranged equidistantly in the circumferential direction; there are a plurality of radially arranged push rods arranged equidistantly in the circumferential direction and having the same number as the cams. The inner end of each push rod forms a cam pair with a cam, the middle part passes through a hole opened on the second annular boss and forms a sliding pair with the corresponding hole, and the outer end is provided with an integrally formed arc-shaped plate, and the arc-shaped plate contacts the inner side of the rubber sealing ring; the driving component includes a driving motor and a gear; the driving motor is fixed to both the first annular boss and the pressure plate retaining ring and drives the gear to rotate, and the gear meshes with the arc-shaped rack.

2. The variable-diameter pressure plate applied to a pressure plate pump according to claim 1, wherein: On the first annular boss, there is an integrally formed and vertically arranged sleeve, and both ends of the housing of the driving motor are fixed to the sleeve and the pressure plate retaining ring respectively through bolt one and bolt two.

3. The variable-diameter pressure plate applied to a pressure plate pump according to claim 1, characterized in that: The inner side wall of the cam disc is provided with a plurality of annular grooves evenly distributed along the axial direction.

4. The variable-diameter pressure plate applied to a pressure plate pump according to claim 1, characterized in that: In the initial state where the rubber sealing ring is not deformed, each push rod is at the innermost end, and the sum of the outer arc lengths of all the arc-shaped plates is equal to the inner circumference of the rubber sealing ring.

5. The variable-diameter pressure plate applied to a pressure plate pump according to claim 1, characterized in that: The width of the arc-shaped plate is equal to the distance between the gasket and the support disc.

6. The variable-diameter pressure plate applied to a pressure plate pump according to claim 5, characterized in that: Both the upper and lower parts of the arc-shaped plate are provided with a plurality of tooth grooves along the arc, forming a plurality of combs.

7. A variable-diameter pressure plate applied to a pressure plate pump according to claim 1, characterized in that: The inner end of the push rod is provided with an integrally formed hemispherical body, and a point contact is formed between the hemispherical body and the corresponding cam.

8. A variable-diameter pressure plate applied to a pressure plate pump according to claim 1, characterized in that: Let half of the difference between the outer diameter of the support disc and the inner diameter of the rubber sealing ring be a, half of the difference between the outer diameter of the gasket and the inner diameter of the rubber sealing ring be b, and the displacement of the push rod be c, then a > c and b > c.

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