VP pump advancer piston mounting structure

Abstract

The utility model relates to a VP pump advancer piston installation structure which comprises a pump body, an advancer front cover and an advancer rear cover are installed at the left end and the right end of the pump body, an advancer piston is arranged in the pump body in a sliding mode, an advancer spring is placed between the advancer piston and the advancer front cover, a sensor is installed on the periphery of the pump body, and the sensor is located at the middle position of the stroke of the advancer piston. The advance device piston comprises a piston body, a spring cavity, a driving cavity and an installation hole are sequentially formed in the piston body, and magnetic steel is installed in the installation hole and fixed through glue. The ring belt straight hole is added to the advance device piston and used for installing the magnetic steel. After the magnetic steel is placed in the advance device piston hole channel, AB glue is selected to seal and fix the permanent magnet. The annular belt straight holes are beneficial to pouring of AB glue, and the magnetic steel can be completely attached and fixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of VP pumps and relates to a VP pump advancer piston installation structure. Background Art

[0002] The advancer piston, located within the advancer cavity of the pump body, moves linearly left and right, working together with the timing sensor and timing solenoid valve to adjust the oil pump's injection starting point. The timing sensor's permanent magnet, along with the advancer spring, rests on the seat of the advancer piston cavity, moving linearly left and right, perpendicular to the timing sensor's Hall element. Because the magnet's surface magnetic flux remains constant, the sensor's Hall element senses different magnetic field components depending on the magnet's position, resulting in different output signals from the sensor's Hall element.

[0003] During movement, the magnet and advancer spring rotate, causing the magnetic field signal to fluctuate, resulting in changes in signal strength. This affects the sensor's linear accuracy. The magnet itself is relatively fragile and vulnerable to knocks and impacts. Left and right linear motion within the piston cavity can cause contact with end components, potentially damaging them and leading to signal loss. Summary of the Invention

[0004] The purpose of the present utility model is to provide a VP pump advancer piston mounting structure that can solve the above-mentioned problems and can completely fit and fix the magnetic steel.

[0005] According to the technical solution provided by the utility model: a VP pump advancer piston mounting structure includes a pump body, an advancer front cover and an advancer rear cover are installed at the left and right ends of the pump body, an advancer piston is slidably provided in the pump body, an advancer spring is placed between the advancer piston and the advancer front cover, a sensor is installed on the outer periphery of the pump body, and the sensor is located in the middle position of the advancer piston stroke; the advancer piston includes a piston body, and the piston body is sequentially provided with a spring cavity, a drive cavity, and a mounting hole, and a magnetic steel is installed in the mounting hole and fixed by glue.

[0006] As a further improvement of the present invention, the right end surface of the piston body is a force-bearing surface.

[0007] As a further improvement of the present invention, the spring cavity is provided with an opening toward the advancer front cover, and the two ends of the advancer spring respectively abut against the advancer front cover and the inner wall of the spring cavity.

[0008] As a further improvement of the present invention, the mounting hole is stepped, which comprises a magnetic steel mounting section, a first glue injection section, and a second glue injection section in sequence.

[0009] As a further improvement of the present invention, a magnetic steel is placed in the magnetic steel installation section, and the magnetic steel and the magnetic steel installation section are clearance-fitted.

[0010] As a further improvement of the present invention, glue is injected into the first glue injection section and the second glue injection section.

[0011] As a further improvement of the present invention, the radial dimension of the first glue injection section is larger than the radial dimensions of the second glue injection section and the magnetic steel installation section.

[0012] The positive progress of this application is:

[0013] 1. This advancer piston features an additional ring with a straight hole for mounting the magnet. After the magnet is placed through the advancer piston hole, AB glue is used to seal and secure the permanent magnet. The straight hole facilitates the injection of AB glue, ensuring a complete fit and securement of the magnet.

[0014] 2. When the advancer piston of the utility model makes linear motion, the width of the induced magnetic field component of the sensor Hall element is reduced by half, and the signal strength is enhanced compared with the original structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 This is a structural diagram of the advancer piston of the utility model.

[0017] Figure 1-Figure 2 The invention comprises a piston body 1, AB glue 2, magnetic steel 3, annular straight hole 4, a pump body 5, an advancer rear cover 6, a sensor 7, an advancer front cover 8, an advancer spring 9, an advancer piston 10 and the like. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate for the embodiments of the present invention described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed may also be "included" and "having"; for example, a process, method, system, product or device that may include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0021] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text.

[0022] like Figure 1 As shown, the utility model is a VP pump advancer piston mounting structure, including a pump body 5, with an advancer front cover 8 and an advancer rear cover 6 installed at the left and right ends of the pump body 5, an advancer piston 10 is slidingly provided in the pump body 5, an advancer spring 9 is placed between the advancer piston 10 and the advancer front cover 8, and a sensor 7 is installed on the outer periphery of the pump body 5, and the sensor 7 is located at the middle position of the stroke of the advancer piston 10.

[0023] like Figure 2 As shown, the advancer piston 10 comprises a piston body 1, which is sequentially provided with a spring chamber 1-1, a drive chamber 1-2, and a mounting hole 1-3. A magnet 3 is mounted in mounting hole 1-3 and secured with glue 2. The right end face of the piston body 1 serves as the load-bearing surface. The pump body 5 is filled with oil, which strikes the load-bearing surface of the piston body 1 at a constant frequency, pushing the piston body 1 toward the advancer front cover 8. When the oil stops striking, the advancer spring 9 returns the piston body 1 to its original position.

[0024] The spring chamber 1 - 1 is provided with an opening toward the advancer front cover 8 , and two ends of the advancer spring 9 respectively abut against the advancer front cover 8 and the inner wall of the spring chamber 1 - 1 .

[0025] The driving cavity 1-2 is used to place the components that need to be driven.

[0026] Mounting holes 1-3 are stepped, forming, in order, the magnet mounting section, the first glue injection section, and the second glue injection section. Magnet 3 is placed in the magnet mounting section, with a clearance fit between the magnet 3 and the magnet mounting section. Glue 2 is injected into the first and second glue injection sections to secure magnet 3 to the magnet mounting section. Glue 2 uses AB glue.

[0027] The radial dimension of the first glue injection section is larger than the radial dimension of the second glue injection section and the magnetic steel installation section, so that an axial limiting structure can be formed after the glue solidifies to prevent the magnetic steel 3 from escaping from the piston body 1.

[0028] Explanation of the sensor 7 being located at the middle position of the stroke of the advancer piston 10: As can be seen from the above statement, the advancer piston 10 reciprocates in the axial direction. If the stroke distance of the advancer piston 10 is a, the sensor 7 is located at a position where the stroke distance of the advancer piston 10 is a / 2.

[0029] When the advancer piston makes linear motion, the width of the magnetic field component induced by sensor 7 is reduced by half, and the signal strength is highly accurate.

[0030] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A VP pump advancer piston mounting structure, comprising a pump body (5), with an advancer front cover (8) and an advancer rear cover (6) mounted on the left and right ends of the pump body (5), characterized in that: An advancer piston (10) is slidably provided in a pump body (5), an advancer spring (9) is placed between the advancer piston (10) and the advancer front cover (8), a sensor (7) is installed on the periphery of the pump body (5), and the sensor (7) is located at the middle position of the stroke of the advancer piston (10); the advancer piston (10) includes a piston body (1), and the piston body (1) is sequentially provided with a spring chamber (1-1), a drive chamber (1-2), and a mounting hole (1-3), and a magnetic steel (3) is installed in the mounting hole (1-3) and fixed by glue (2).

2. The VP pump advancer piston mounting structure according to claim 1, characterized in that: The right end surface of the piston body (1) is the force-bearing surface.

3. The VP pump advancer piston mounting structure according to claim 1, characterized in that: The spring chamber (1-1) is provided with an opening toward the advancer front cover (8), and two ends of the advancer spring (9) respectively abut against the advancer front cover (8) and the inner wall of the spring chamber (1-1).

4. The VP pump advancer piston mounting structure according to claim 1, characterized in that: The mounting holes (1-3) are in a step-like shape, and are sequentially divided into a magnetic steel mounting section, a first glue injection section, and a second glue injection section.

5. The VP pump advancer piston mounting structure according to claim 4, characterized in that: The magnetic steel (3) is placed in the magnetic steel installation section, and the magnetic steel (3) and the magnetic steel installation section are clearance-fitted.

6. The VP pump advancer piston mounting structure according to claim 4, characterized in that: Glue (2) is injected into the first glue injection section and the second glue injection section.

7. The VP pump advancer piston mounting structure according to claim 4, characterized in that: The radial dimension of the first glue injection section is larger than the radial dimensions of the second glue injection section and the magnetic steel installation section.

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