Adjustable pressure spring structure pump head

Abstract

The utility model discloses a kind of adjustable pressure extension spring structure pump head, belong to peristaltic pump technical field, including shell cover, front and rear support, lower pressing block, gyro wheel assembly, flip and eccentric mechanism, eccentric mechanism contains connecting shaft, eccentric block, connecting rod and connecting sleeve rod;Front and rear support are elastically connected with connecting rod by extension spring, only can move up and down by shell cover sliding slot restriction;Flip overturn drives eccentric block to rotate, so that connecting shaft generates eccentric motion, drives support and pipe clamp, lower pressing block moves up and down to be clamped hose;Rear support extension spring connects round bar, round bar is inserted into lower pressing block and is connected by adjusting screw, rotating adjusting screw can stepless adjust extension spring length and hose clamping force.The utility model prolongs hose service life by extension spring elastic pressure pipe, adjusting screw realizes pressure flexible adjustment, applicable to a variety of peristaltic pump scene.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and in particular to an adjustable pressure spring structure pump head. Background Technology

[0002] Peristaltic pumps deliver fluid by squeezing and releasing a delivery hose using rollers, and most peristaltic pumps currently perform basic pumping functions. However, existing peristaltic pump heads generally have a drawback: they cannot simultaneously provide stepless pressure regulation and spring-loaded hose compression. This deficiency stems primarily from a lack of customer-specific practicality studies on the product's main structure and a lack of diverse design approaches for the product and its structure, making it difficult to meet the hose pressure regulation and elastic compression requirements in different scenarios. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable pressure spring structure pump head that simultaneously achieves stepless pressure adjustment and spring elastic compression of the hose.

[0004] To achieve the above objectives, this utility model provides an adjustable pressure spring-loaded pump head, including a housing, a front support, a rear support, a lower pressure block, a roller assembly, a flip cover, and an eccentric mechanism. The flip cover is connected to the eccentric mechanism, which includes a connecting shaft, an eccentric block, and a connecting rod. Both the front and rear supports are installed inside the housing and move up and down via a sliding groove inside the housing. The front support is connected to the connecting rod via a front support spring, and the rear supports are connected to the connecting rod via a rear support spring, enabling the front and rear supports to move up and down synchronously with the connecting rod. The eccentric block is confined to a circular hole in the housing for rotation. The connecting shaft passes through the connecting rod and is connected to the eccentric block. The flip cover flips, driving the eccentric block to rotate synchronously, causing the connecting shaft to generate eccentric motion, which in turn drives the front and rear supports to move up and down along the sliding groove. The roller assembly is connected to a motor.

[0005] Preferably, the lower end of the front bracket is fixedly connected to a pipe clamp, and the upper inner side of the front bracket is symmetrically provided with elongated holes. The front bracket has two tension springs arranged symmetrically. One end of the front bracket tension spring is hooked to the upper round hole of the pipe clamp, and the other end is hooked to the bottom opening of the connecting rod and contacts the bottom of the elongated hole of the front bracket.

[0006] Preferably, the lower end of the rear bracket is fixedly connected to the lower pressure block by bolts, and the upper inner side of the rear bracket is also symmetrically provided with elongated holes. The rear bracket has two tension springs arranged symmetrically. One end of the tension spring is connected to the upper opening of the round rod, and the other end is hooked to the lower opening of the connecting rod and contacts the bottom of the elongated hole of the rear bracket.

[0007] Preferably, the upper surface of the lower pressure block is provided with an opening corresponding to the round rod, the lower part of the round rod is provided with a threaded hole, the lower part of the round rod extends into the opening on the upper surface of the lower pressure block, and an adjusting screw is provided at the opening on the lower surface of the lower pressure block. The adjusting screw and the lower part of the round rod form a threaded connection inside the opening of the lower pressure block, and the length of the tension spring can be adjusted by rotating the adjusting screw.

[0008] Preferably, the upper end of the flip cover has an elongated oval first opening on both sides. The eccentric mechanism also includes a connecting sleeve rod. The connecting sleeve rod passes through the first opening and the eccentric hole of the eccentric block in sequence, and is then fastened to the threaded holes at both ends of the connecting shaft by screws. The cross section of the connecting sleeve rod in contact with the first opening is elongated oval and fits the opening. When the flip cover rotates, the first opening and the connecting sleeve rod cooperate to realize the rotation of the eccentric block in the circular hole of the cover, which drives the connecting shaft to make eccentric movement.

[0009] Preferably, one end of the motor spindle passes through the roller assembly and is fixed with screws, while the other end is connected to an external drive motor.

[0010] Preferably, the fixing plate and the housing are connected by screws and locating pins to form an integral structure.

[0011] Therefore, the present invention adopts the above-mentioned adjustable pressure spring structure pump head, which has the following technical effects: (1) This application uses a tension spring to elastically connect the front support pipe clamp and the rear support pressure block. The elastic action of the tension spring achieves elastic compression of the hose, which can effectively buffer pressure impact and extend the service life of the hose. (2) The present application uses the adjusting screw structure between the round rod connected to the rear bracket tension spring and the lower pressure block to steplessly adjust the tension of the tension spring, thereby flexibly adjusting the tension of the tension spring and achieving precise adjustment of the hose pressure to meet the pumping needs in different scenarios. (3) The eccentric mechanism and the flip cover of this application are linked. The flip cover drives the eccentric block to rotate, and the motion is stably transmitted to the front and rear supports. This ensures that the supports move up and down accurately along the slide groove, and ensures that the pipe clamp and the lower pressure block can reliably clamp and press the hose.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is an anatomical view of an adjustable pressure spring structure pump head according to this utility model.

[0014] Figure Labels 1. Housing; 2. Front bracket; 3. Rear bracket; 4. Lower pressure block; 5. Pipe clamp; 6. Roller assembly; 7. Flip cover; 71. First opening; 8. Eccentric mechanism; 81. Connecting shaft; 82. Eccentric block; 83. Connecting rod; 9. Front bracket tension spring; 10. Rear bracket tension spring; 11. Round rod; 12. Adjusting screw; 13. Fixing plate; 14. Screw; 15. Connecting sleeve rod. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0016] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] like Figure 1 As shown, an adjustable pressure spring structure pump head includes a housing 1, a front bracket 2, a rear bracket 3, a lower pressure block 4, a roller assembly 6, a flip cover 7, and an eccentric mechanism 8. It also includes a fixing plate 13, which is connected to the housing 1 by four screws 14 and a positioning pin, so that the entire pump head forms a stable overall structure and ensures that each component runs along a predetermined trajectory.

[0018] The flip cover 7 is connected to the eccentric mechanism 8, which includes a connecting shaft 81, an eccentric block 82, a connecting rod 83, and a connecting sleeve 15. The flip cover 7 has symmetrically arranged elongated first openings 71 on both sides of its upper end. The connecting sleeve 15 passes through the first opening 71 and the eccentric hole of the eccentric block 82, and is threadedly connected to the threaded holes at both ends of the connecting shaft 81 by screws 14. The cross-section of the section of the connecting sleeve 15 that contacts the first opening 71 is elongated and fits the first opening 71, ensuring that the flip cover 7 can drive the eccentric block 82 to rotate synchronously when flipped. The eccentric block 82 is confined within the circular hole of the housing 1 and can rotate along the circular hole. The connecting shaft 81 passes through the connecting rod 83 and is fastened to the eccentric block 82 by screws 14, so that the rotation of the eccentric block 82 drives the connecting shaft 81 to produce eccentric motion.

[0019] Both the front support 2 and the rear support 3 are installed inside the housing 1. The front support 2 is attached to the inside of the housing 1 and its movement direction is restricted by a sliding groove. The rear support 3 is attached to the rear of the housing 1 and its movement direction is restricted by a sliding groove, so that both can only move up and down along the sliding groove. A pipe clamp 5 is fixedly connected to the lower end of the front support 2. The pipe clamp 5 includes a V-shaped double-hook pipe clamp 5 and an arc-shaped single-hook pipe clamp 5. The V-shaped double-hook pipe clamp 5 is used to clamp the inlet end of the hose, and the arc-shaped single-hook pipe clamp 5 is used to prevent the hose outlet end from accumulating. Elongated holes are symmetrically opened on the inner side of the upper end. Two symmetrically arranged front support tension springs 9 are installed on the front support 2. One end of the tension spring is hooked to the upper circular hole of the pipe clamp 5, and the other end is hooked to the bottom opening of the connecting rod 83 and is in close contact with the bottom of the elongated hole of the front support 2, so as to realize the elastic connection between the front support 2 and the connecting rod 83.

[0020] The lower end of the rear support 3 is fixedly connected to the lower pressure block 4 by bolts and moves together with the support. The upper inner side of the rear support 3 has symmetrically arranged elongated holes, on which two symmetrically arranged rear support tension springs 10 are installed. One end of the tension spring is hooked to the upper opening of the round rod 11, and the other end is hooked to the lower opening of the connecting rod 83, and is in close contact with the bottom of the elongated holes of the rear support 3, achieving an elastic connection between the rear support 3 and the connecting rod 83. The upper surface of the lower pressure block 4 has an opening corresponding to the round rod 11. The lower part of the round rod 11 has a threaded hole. After the lower part of the round rod 11 passes through the opening of the lower pressure block 4, it is threadedly connected to the round rod 11 through the adjusting screw 12 at the opening on the lower surface of the lower pressure block 4. Rotating the adjusting screw 12 can change the position of the round rod 11, thereby adjusting the length of the rear support tension spring 10.

[0021] The roller assembly 6 is connected to the motor. One end of the motor spindle passes through the roller assembly 6 and is fixed with screw 14, while the other end is connected to an external drive motor to provide power to the roller assembly 6.

[0022] Working principle: When the flip cover 7 is opened, the flip cover 7 drives the eccentric block 82 to rotate in the round hole of the shell 1 through the cooperation of the oblong first opening 71 and the connecting sleeve rod 15, which in turn drives the connecting shaft 81 to generate eccentric motion. The connecting rod 83 moves with the connecting shaft 81, and through the front and rear support tension springs 10, it applies a downward force to the front support 2 and the rear support 3 respectively, so that the front support 2 drives the tube clamp 5 and the rear support 3 drives the lower pressure block 4 to move downward synchronously, making room for the peristaltic pump special hose to be installed.

[0023] When the flip cover 7 is closed, the eccentric block 82 rotates in the opposite direction. The eccentric movement of the connecting shaft 81 drives the connecting rod 83 to move upward. Under the elastic action of the tension spring, the front bracket 2 drives the pipe clamp 5 and the rear bracket 3 drive the lower pressure block 4 to move upward synchronously. The pipe clamp 5 tightens the hose, and the lower pressure block 4 presses the hose tightly onto the rollers of the roller assembly 6. By rotating the adjusting screw 12, the length of the rear bracket tension spring 10 can be adjusted to change the tension of the spring and achieve stepless adjustment of the squeezing force on the hose. The longer the tension spring, the greater the tension, and the greater the squeezing force of the lower pressure block on the hose, and vice versa.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A pump head with an adjustable pressure spring structure, characterized in that: The device includes a housing, a front support, a rear support, a lower pressure block, a roller assembly, a flip cover, and an eccentric mechanism. The flip cover is connected to the eccentric mechanism, which includes a connecting shaft, an eccentric block, and a connecting rod. Both the front and rear supports are installed inside the housing and move up and down via a sliding groove inside the housing. The front support is connected to the connecting rod via a front support tension spring, and the rear supports are also connected to the connecting rod via a rear support tension spring, enabling the front and rear supports to move up and down synchronously with the connecting rod. The eccentric block is confined to a circular hole in the housing and rotates within it. The connecting shaft passes through the connecting rod and is connected to the eccentric block. The flip cover flips, driving the eccentric block to rotate synchronously, causing the connecting shaft to move eccentrically, which in turn drives the front and rear supports to move up and down along the sliding groove. The roller assembly is connected to a motor.

2. The adjustable pressure spring structure pump head according to claim 1, characterized in that: The lower end of the front bracket is fixedly connected to a pipe clamp, and the upper inner side of the front bracket is symmetrically provided with elongated holes. The front bracket has two tension springs arranged symmetrically. One end of the front bracket tension spring is hooked to the upper round hole of the pipe clamp, and the other end is hooked to the bottom opening of the connecting rod and contacts the bottom of the elongated hole of the front bracket.

3. The adjustable pressure spring structure pump head according to claim 2, characterized in that: The lower end of the rear bracket is fixedly connected to the lower pressure block by bolts. The upper inner side of the rear bracket is also symmetrically provided with elongated holes. There are two tension springs in the rear bracket, which are symmetrically arranged. One end of the tension spring is connected to the upper opening of the round rod, and the other end is hooked to the bottom opening of the connecting rod and contacts the bottom of the elongated hole of the rear bracket.

4. The adjustable pressure spring structure pump head according to claim 3, characterized in that: The upper surface of the lower pressure block has an opening corresponding to the round rod. The lower part of the round rod has a threaded hole and extends into the opening on the upper surface of the lower pressure block. An adjusting screw is provided at the opening on the lower surface of the lower pressure block. The adjusting screw and the lower part of the round rod form a threaded connection inside the opening of the lower pressure block. The length of the tension spring can be adjusted by rotating the adjusting screw.

5. The adjustable pressure spring structure pump head according to claim 4, characterized in that: The flip cover has elongated oval first openings on both sides of its upper end. The eccentric mechanism also includes a connecting sleeve rod. The connecting sleeve rod passes through the first opening and the eccentric hole of the eccentric block in sequence, and is then fastened to the threaded holes at both ends of the connecting shaft by screws. The cross section of the connecting sleeve rod in contact with the first opening is elongated oval and fits the opening. When the flip cover rotates, the first opening and the connecting sleeve rod cooperate to realize that the eccentric block rotates in the circular hole of the cover, driving the connecting shaft to make eccentric movements.

6. The adjustable pressure spring structure pump head according to claim 5, characterized in that: One end of the motor spindle passes through the roller assembly and is fixed with screws, while the other end is connected to an external drive motor.

7. The adjustable pressure spring structure pump head according to claim 6, characterized in that: It also includes a fixing plate, which is connected to the housing by screws and locating pins to form an integral structure.

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