Novel fuel pump liquid level sensor support module

Abstract

The utility model relates to a novel fuel pump liquid level sensor support module which comprises a top cover assembly, a sensor support, an oil level sensor assembly and an oil pump assembly. A supporting rod of a top cover assembly sequentially penetrates through a support guide rod hole of a sensor support and an oil pump guide rod hole of an oil pump assembly, due to the fact that motorcycle oil tanks are various in shape, the upper space in part of the oil tanks is large, and the lower space is small, when the oil level center is low, design cannot be well achieved; therefore, by adding the sensor support, the oil level sensor assembly can be installed at a higher point on the basis that the original structure is not affected, and oil level design is facilitated. The sensor support is compact in structure, reasonable in design, short in forming period, easy to control in size, high in plastic deformation, high in universality, capable of meeting production and assembly requirements, low in requirement for operating skills of workers, easy to master, high in product percent of pass and capable of meeting the working performance requirements of products.

Description

Technical Field

[0001] The utility model relates to the field of fuel pump bracket assembly parts, in particular to a novel fuel pump liquid level sensor bracket module. Background Art

[0002] The motorcycle fuel pump bracket assembly is one of the basic components of the motorcycle fuel injection system. Its function is to pump the fuel out of the fuel tank and work with the fuel pressure regulating valve to establish a certain fuel pressure. The pressurized fuel is delivered to the fuel supply pipeline through the top cover pipeline quick connector to ensure the normal operation of the engine. The oil level sensor assembly can float on the oil level of the gasoline medium through a float, feedback and output different resistance values, and finally display the remaining fuel in the tank on the fuel gauge.

[0003] Existing oil level design requirements: 1. The movement trajectory of the float rod of the oil level sensor assembly must be at least 20mm away from the inner wall of the fuel tank to ensure that it will not touch during movement; 2. The highest point of the float rod must be within 15-20mm from the top of the fuel tank, and the lowest point must be within 15-20mm from the bottom of the fuel tank to ensure the accuracy of the fuel gauge showing the remaining gasoline in the tank.

[0004] However, due to the various shapes of motorcycle fuel tanks, some fuel tanks have a large upper space and a small lower space, and the oil level center of the existing fuel pump bracket assembly is low. After the first condition is met, the rotation radius of the float rod is reduced and cannot meet the condition that the highest point of the float rod is within 15-20mm from the top of the fuel tank, making the design difficult.

[0005] In view of the above-mentioned defects, the present application has made improvements. On the basis of not affecting the original structure, the oil level sensor assembly can be installed at a higher point to facilitate the oil level design. Utility Model Content

[0006] The utility model provides a novel fuel pump liquid level sensor bracket module, which solves the above problems existing in the use process of the prior art.

[0007] The technical solution of the utility model is achieved as follows: a novel fuel pump liquid level sensor bracket module includes a top cover assembly, a sensor bracket, an oil level sensor assembly and an oil pump assembly, support rods are fixedly connected on both sides of the lower end of the top cover assembly, bracket guide rod holes are opened on both sides of the sensor bracket, and oil pump guide rod holes are opened on both sides of the oil pump assembly, the top cover assembly, the sensor bracket and the oil pump assembly are arranged in sequence from top to bottom, the support rod passes downward through the bracket guide rod hole and the oil pump guide rod hole, the oil pump assembly is provided with a limiting mechanism for limiting the support rod on the lower side of the oil pump guide rod hole, and the oil level sensor assembly can be detachably mounted on the sensor bracket.

[0008] Preferably, the oil level sensor assembly is fixedly connected with lateral elastic hooks on the left and right side walls on its upper side, and the oil level sensor assembly is also provided with a bottom elastic hook in the middle of its lower side. The sensor bracket is provided with a bracket lateral groove corresponding to the lateral elastic hook and a bracket bottom groove corresponding to the bottom elastic hook, the lateral elastic hook is snapped into the bracket lateral groove, and the bottom elastic hook is snapped into the bracket bottom groove.

[0009] Preferably, an oil level limiting column is provided on the side of the oil level sensor assembly facing the sensor bracket, and a bracket limiting small circular groove corresponding to the oil level limiting column is opened on the sensor bracket, and the oil level limiting column is used to fit in the bracket limiting small circular groove with clearance.

[0010] Preferably, a float rod mounting column is provided on the oil level sensor assembly, and a large circular groove of the bracket limiting corresponding to the float rod mounting column is opened on the sensor bracket, the oil level limiting column is used to fit in the large circular groove of the bracket limiting with clearance, and the float rod mounting column is connected to the float rod assembly.

[0011] Preferably, a spring is sleeved on the support rod, and the upper and lower ends of the spring are respectively abutted against the top cover assembly and the sensor bracket.

[0012] Preferably, the limiting mechanism includes a neck sleeve located at the lower side of the oil pump guide rod hole, the lower end of the support rod is fixedly connected to a limiting head, and the limiting head passes over the neck sleeve and is limited at the lower side of the neck sleeve.

[0013] Preferably, a relief opening is provided on the middle portion of the back side of the sensor bracket, and a bellows connected to the top cover assembly is provided on the oil pump assembly, and the relief opening is for the bellows to pass through.

[0014] Preferably, the material of the sensor bracket is POM copolymer material.

[0015] In summary, the beneficial effects of the present invention are:

[0016] 1. The utility model adds a sensor bracket so that the oil level sensor assembly can be installed at a higher position, which is convenient for oil level design. The sensor bracket and the oil pump assembly are installed on the support rod of the top cover assembly, and the oil level sensor assembly can be detachably installed on the sensor bracket. The matching relationship is reliable and easy to operate during production, assembly, maintenance and replacement.

[0017] 2. The oil level sensor assembly is fixedly connected with lateral elastic hooks on the left and right side walls on its upper side, and is provided with a bottom elastic hook in the middle of its lower side. In addition, the oil level sensor assembly is also provided with an oil level limit column and a float rod mounting column on the side facing the sensor bracket, and the sensor bracket is provided with a bracket lateral slot and a bracket bottom slot, as well as a bracket limit small circular groove and a bracket limit large circular groove. During installation, the lateral elastic hook is buckled into the bracket lateral slot, the bottom elastic hook is buckled into the bracket bottom slot, the oil level limit column gap fits in the bracket limit small circular groove, and the oil level limit column gap fits in the bracket limit large circular groove. This structure is easy to assemble, has low requirements on workers' operating skills during production, assembly, maintenance and replacement, and is easy to use and easy to reverse.

[0018] 3. The spring on the support rod is supported on the top cover assembly and the sensor bracket, which can limit the up and down displacement of the sensor bracket. There are two support rods, so passing through the two guide rod holes of the bracket can limit the rotational movement of the sensor bracket. In addition, after the support rod passes downward through the guide rod hole of the bracket and the guide rod hole of the oil pump, the limit head at the lower end of the support rod passes over the neck sleeve and is limited to the lower side of the neck sleeve, so the support rod will not fall out of the guide rod hole of the oil pump. The installation is reliable and it is also very convenient to disassemble.

[0019] 4. There is an avoidance opening on the middle part of the back side of the sensor bracket to avoid the oil pump bellows of the oil pump assembly, making it convenient to install the oil pump bellows on the top cover assembly.

[0020] 5. The material of the sensor bracket is POM copolymer material, which has good dimensional molding stability, high surface hardness, self-lubrication, friction and excellent electrical insulation. It can withstand a variety of conventional fuel media such as methanol gasoline, ethanol gasoline, and ordinary gasoline, and maintain considerable chemical stability at high temperatures. It can cope well with the complex working environment in the motorcycle tank. The injection-molded sensor bracket is firmly installed and can meet the requirements of use and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the structure of an existing fuel pump bracket assembly matching a fuel tank with a large upper space and a small lower space;

[0023] Figure 2 This is a schematic diagram of the structure of the oil tank with a large upper space and a small lower space according to the utility model;

[0024] Figure 3 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 4 for Figure 3 Schematic diagram of the structure when observing from the rear side;

[0026] Figure 5 It is a schematic diagram of the explosion of the structure of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the sensor bracket in the utility model;

[0028] Figure 7 for Figure 6 Schematic diagram of the structure when observed from the rear side;

[0029] Figure 8 This is a schematic diagram of the structure of the oil level sensor assembly of the utility model when observed from the back side;

[0030] Fig. 9 This is a structural schematic diagram of the oil level sensor assembly in the utility model;

[0031] Fig.10 It is a schematic diagram of the structural explosion of the oil level sensor assembly in the utility model.

[0032] In the figure: 1. Top cover assembly; 2. Sensor bracket; 21. Bracket guide rod hole; 22. Bracket lateral slot; 23. Bracket bottom slot; 24. Bracket limit small circular slot; 25. Bracket limit large circular slot; 26. Avoidance; 3. Oil level sensor assembly; 31. Lateral elastic hook; 32. Bottom elastic hook; 33. Oil level limit column; 34. Float rod mounting column; 35. Rotation limit block; 36. Float rod assembly; 4. Oil pump assembly; 41. Oil pump guide rod hole; 42. Neck sleeve; 43. Bellows; 44. Pressure valve assembly structure; 5. Support rod; 51. Limit head; 6. Spring; 7. Oil tank; 8. Float rod movement trajectory. DETAILED DESCRIPTION

[0033] The following will be combined with the attached embodiment of the present utility model Figure 1-10 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example:

[0035] Figure 1The structural diagram of the existing fuel pump bracket assembly matching the fuel tank 7 with large upper space and small lower space is shown. The fuel level sensor assembly 3 is located on the fuel pump assembly 4. After the float rod movement trajectory 8 of the fuel level sensor assembly 3 is required to be at least 20mm away from the inner wall of the fuel tank 7 to ensure that it will not touch during movement, even if the float rod assembly 36 rotates to the highest point (usually the float rod assembly 36 on the fuel level sensor assembly 3 has a rotation angle, generally between 80° and 90°, and cannot rotate 360 ​​degrees), it is still 35.2mm away from the upper surface, but the design requirement is 15-20mm. The large gap affects the accuracy of the fuel gauge. Therefore, the position of the fuel level sensor assembly 3 needs to be raised to facilitate the design of the fuel level.

[0036] Figure 2 This is a schematic diagram of the structure of the utility model matching an oil tank 7 with a large upper space and a small lower space. By adding a sensor bracket 2, the oil level sensor assembly 3 can be installed at a higher position. The float rod assembly 36 can just meet the oil level design conditions under the limitation of the rotation angle of the oil level sensor assembly 3, which facilitates the oil level design.

[0037] The following is a detailed description:

[0038] like Figures 3 to 10 As shown, the utility model discloses a novel fuel pump liquid level sensor bracket 2 module, including a top cover assembly 1, a sensor bracket 2, an oil level sensor assembly 3 and an oil pump assembly 4, support rods 5 are fixedly connected on both sides of the lower end of the top cover assembly 1, support guide rod holes 21 are opened on both sides of the sensor bracket 2, and oil pump guide rod holes 41 are opened on both sides of the oil pump assembly 4, wherein the top cover assembly 1, the sensor bracket 2 and the oil pump assembly 4 are sequentially arranged from top to bottom, and when installing, the support rod 5 passes downward through the support guide rod hole 21 and the oil pump guide rod hole 41, and the oil pump assembly 4 is A limiting mechanism for limiting the support rod 5 is provided on the lower side of the oil pump guide rod hole 41. Specifically, the limiting mechanism includes a neck sleeve 42 located on the lower side of the oil pump guide rod hole 41. The lower end of the support rod 5 is fixedly connected to a limiting head 51. The limiting head 51 passes over the neck sleeve 42 and is limited to the lower side of the neck sleeve 42. A spring 6 is also sleeved on the support rod 5. The upper and lower ends of the spring 6 are respectively abutted against the top cover assembly 1 and the sensor bracket 2. The spring 6 can limit the up and down displacement of the sensor bracket 2, so that the sensor bracket 2 is stably installed on the support rod 5. In addition, the oil level sensor assembly 3 can be detachably installed on the sensor bracket 2.

[0039] The specific structure of the oil level sensor assembly 3 detachably mounted on the sensor bracket 2 is as follows: the oil level sensor assembly 3 is fixedly connected with lateral elastic hooks 31 on the upper positions of its left and right side walls, and the oil level sensor assembly 3 is also provided with a bottom elastic hook 32 in the middle of its lower side, and the sensor bracket 2 is provided with a bracket lateral groove 22 corresponding to the lateral elastic hook 31 and a bracket bottom groove 23 corresponding to the bottom elastic hook 32, wherein the lateral elastic hook 31 is snapped into the bracket lateral groove 22, and the bottom elastic hook 32 is snapped into the bracket bottom groove 23.

[0040] Furthermore, an oil level limit column 33 is provided on the side of the oil level sensor assembly 3 facing the sensor bracket 2, and a bracket limit small circular groove 24 corresponding to the oil level limit column 33 is opened on the sensor bracket 2, and the oil level limit column 33 is used to clearance fit in the bracket limit small circular groove 24. In addition, a float rod mounting column 34 is also provided on the oil level sensor assembly 3, and a bracket limit large circular groove 25 corresponding to the float rod mounting column 34 is opened on the sensor bracket 2, and the oil level limit column 33 is used to clearance fit in the bracket limit large circular groove 25, and a float rod assembly 36 is connected to the float rod mounting column 34.

[0041] It should be noted that the top cover assembly 1, the oil level sensor assembly 3, and the oil pump assembly 4 are all prior art. As shown in the figure, the angle that the float rod assembly 36 can rotate on the oil level sensor assembly 3 is limited by the rotation limit block 35, so the movement trajectory of the float rod can be as follows: Figure 2 As shown, it is limited within a certain range, so combined with the arrangement of the sensor bracket 2, the oil level sensor assembly 3 is arranged at a higher position, so that the oil level design conditions can be easily met.

[0042] In the utility model, the sensor bracket 2 has an escape opening 26 on the middle of the back side, and the oil pump assembly 4 has a bellows 43 connected to the top cover assembly 1. The escape opening 26 allows the bellows 43 to pass through, making it convenient for the oil pump bellows 43 to be installed on the top cover assembly 1.

[0043] The material of the sensor bracket 2 is POM copolymer material, which has good dimensional molding stability, high surface hardness, self-lubrication, friction and excellent electrical insulation. It can withstand a variety of conventional fuel media such as methanol gasoline, ethanol gasoline, and ordinary gasoline, and maintain considerable chemical stability at high temperatures. It can cope well with the complex working environment in the motorcycle tank 7. The injection-molded sensor bracket 2 is firmly installed and can meet the use and installation requirements.

[0044] During installation, the support rod 5 on the top cover assembly 1 passes through the spring 6, the support guide rod hole 21 on the sensor bracket 2 and the oil pump guide rod hole 41 on the oil pump assembly 4 from top to bottom in sequence, until the limit head 51 at the lower end of the support rod 5 passes over the neck sleeve 42 and is limited to the lower side of the neck sleeve 42. At this time, the sensor bracket 2 is limited between the spring 6 and the oil pump assembly 4. It should be noted that if the sensor bracket 2 is to be set upwards, a sleeve can be sleeved on the support rod 5, so that the sleeve is located between the oil pump assembly 4 and the sensor bracket 2, thereby raising the sensor bracket 2 again. Specifically, According to the design requirements, after completing the installation of the sensor bracket 2, the lateral elastic hook 31 on the oil level sensor assembly 3 is buckled into the lateral slot 22 of the bracket, the bottom elastic hook 32 is buckled into the bottom slot 23 of the bracket, the oil level limit column 33 is gapped in the bracket limit small circular groove 24, and the oil level limit column 33 is gapped in the bracket limit large circular groove 25, thereby completing the installation of the oil level sensor assembly 3, and then press-fit the oil pump bellows 43 of the oil pump assembly 4 onto the top cover assembly 1, and insert the wiring harness terminal into the corresponding plug-in piece of the top cover assembly 1 as required, and the installation is completed.

[0045] The following is a more specific installation and size description: During installation, the inner diameter of the large circular groove 25 of the bracket limit is φ7.4mm, and the outer diameter of the float rod mounting column 34 is φ7.2mm, which is a clearance fit. The inner diameter of the small circular groove 24 of the bracket limit is φ5mm, and the outer diameter of the oil level limiting column 33 is φ4mm, which is a clearance fit. At the same time, the small circular groove 24 of the bracket limit and the large circular groove 25 of the bracket limit are provided with a process bevel at the opening of the installation end to facilitate installation. Align the oil level sensor assembly 3 with the corresponding slot of the sensor bracket 2. The maximum width of the lateral slots 22 of the two sides of the bracket is 22.4mm, and the width of the root of the two lateral elastic hooks 31 is 23.2mm. The two are interference fit, firmly installed, and the side of the side slots 22 of the bracket corresponding to the hook side is provided with a process bevel, which is convenient for installation; the maximum distance from the bottom slot 23 of the bracket to the center of the bracket limit large circular groove 25 is 12.3mm, and the maximum distance from the root of the bottom elastic hook 32 to the center of the float rod mounting column 34 is 12.8mm. The two are interference fit, firmly installed, and the side of the side of the side slot 23 of the bracket corresponding to the hook side is provided with a process bevel, which is convenient for installation. When disassembling, use tools to pry the two lateral elastic hooks 31 and the bottom elastic hook 32 of the oil level sensor assembly 3 to unlock, and the oil level sensor assembly 3 can be pulled out, which is convenient for assembly. During production, assembly, maintenance and replacement, the workers' operating skills are low, easy to use, and easy to reverse.

[0046] The support rod 5 of the top cover assembly 1 with an outer diameter of φ6mm passes through the bracket guide rod hole 21 with an inner diameter of φ6.2mm and is installed on the oil pump assembly 4. The two are matched with a clearance to facilitate installation; the avoidance opening 26 is 14mm wide, which avoids the outer diameter φ12mm of the oil pump bellows 43 of the oil pump assembly 4, making it convenient for the oil pump bellows 43 to be installed on the top cover assembly 1; due to the pressure valve assembly structure 44 of the oil pump assembly 4, the mounting plate structure of the sensor bracket 2 assembled with the oil level sensor assembly 3 is moved up 8mm for avoidance to facilitate installation.

[0047] The oil level sensor assembly 3 is mounted on the sensor bracket 2, and the sensor bracket 2 is mounted above the oil pump assembly 4. Compared with the oil level center distance of 145mm in the original structure, the oil level center distance of the utility model is 67mm, which facilitates the oil level design; at the same time, sleeve components can be added, the sleeve has an inner diameter of φ6.5mm and an outer diameter of φ10.5mm, and the height can be determined according to design requirements. The sleeve passes through the φ6mm support rod 5 and is installed between the oil pump assembly 4 and the sensor bracket 2, and the oil level center can be raised again by a sleeve height distance, with a simple structure and strong versatility.

[0048] It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of fuel pump liquid level sensor bracket module, characterized in that: The invention comprises a top cover assembly, a sensor bracket, an oil level sensor assembly and an oil pump assembly, wherein support rods are fixedly connected to the left and right sides of the lower end of the top cover assembly, bracket guide rod holes are opened on the left and right sides of the sensor bracket, and oil pump guide rod holes are opened on the left and right sides of the oil pump assembly, the top cover assembly, the sensor bracket and the oil pump assembly are arranged in sequence from top to bottom, the support rod passes downward through the bracket guide rod hole and the oil pump guide rod hole, the oil pump assembly is provided with a limiting mechanism on the lower side of the oil pump guide rod hole for limiting the support rod, and the oil level sensor assembly can be detachably mounted on the sensor bracket.

2. A novel fuel pump liquid level sensor bracket module according to claim 1, characterized in that: The oil level sensor assembly is fixedly connected with lateral elastic hooks on the left and right side walls on its upper side, and the oil level sensor assembly is also provided with a bottom elastic hook in the middle of its lower side. The sensor bracket is provided with a bracket lateral groove corresponding to the lateral elastic hook and a bracket bottom groove corresponding to the bottom elastic hook. The lateral elastic hook is buckled in the bracket lateral groove, and the bottom elastic hook is buckled in the bracket bottom groove.

3. A novel fuel pump liquid level sensor bracket module according to claim 2, characterized in that: An oil level limiting column is provided on the side of the oil level sensor assembly facing the sensor bracket, and a bracket limiting small circular groove corresponding to the oil level limiting column is opened on the sensor bracket. The oil level limiting column is used to be clearance-fitted in the bracket limiting small circular groove.

4. A novel fuel pump liquid level sensor bracket module according to claim 3, characterized in that: The oil level sensor assembly is provided with a float rod mounting column, the sensor bracket is provided with a bracket limiting large circular groove corresponding to the float rod mounting column, the oil level limiting column is used to fit in the bracket limiting large circular groove with clearance, and the float rod mounting column is connected to the float rod assembly.

5. A novel fuel pump liquid level sensor bracket module according to claim 1, characterized in that: A spring is sleeved on the support rod, and the upper and lower ends of the spring are respectively supported on the top cover assembly and the sensor bracket.

6. A novel fuel pump liquid level sensor bracket module according to claim 1, characterized in that: The limiting mechanism includes a neck sleeve located at the lower side of the oil pump guide rod hole, the lower end of the support rod is fixedly connected to a limiting head, and the limiting head passes over the neck sleeve and is limited at the lower side of the neck sleeve.

7. A novel fuel pump liquid level sensor bracket module according to claim 1, characterized in that: The sensor bracket has an escape opening in the middle of the back side, the oil pump assembly has a bellows connected to the top cover assembly, and the escape opening is for the bellows to pass through.

8. A novel fuel pump liquid level sensor bracket module according to claim 1, characterized in that: The material of the sensor bracket is POM copolymer material.

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