Rheostat rotation type liquid level sensor structure applied to fuel pump

Abstract

According to the rheostat rotating type liquid level sensor structure applied to the fuel pump, a rheostat is rotatably arranged on a brush piece seat, so that the rheostat can rotate around a rotating center. Therefore, when the floater component is used in the structure of the liquid level sensor, the theoretical movement range of the floater component can be close to 180 degrees. The rheostat is connected with the brush piece seat in a rotating mode according to the same rotating radius of the floater rod, the floater assembly is driven to rotate, the lifting height of the floater can be larger, and the displayed fuel volume is larger.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel pump technical field, concretely relates to a rheostat rotating type liquid level sensor structure for fuel pump. BACKGROUND

[0002] In prior art, the maximum activity angle range of swing arm type liquid level sensor assembly is limited to 100 DEG, which is mainly caused by the structure design of swing arm and float connection. The activity range of swing arm is limited, so that the sensitivity and accuracy of sensor in detecting fuel liquid level are limited. In addition, the connecting part of swing arm and float of swing arm type liquid level sensor is easy to wear in long-term use, so that the swing arm activity is not flexible, which influences the stability and reliability of sensor. SUMMARY

[0003] Therefore, the utility model provides a rheostat rotating type liquid level sensor structure for fuel pump.

[0004] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A rheostat rotating type liquid level sensor structure for fuel pump, including brush piece seat, rheostat and float assembly, the rheostat includes rheostat seat and rheostat body, the rheostat body is fixed on the rheostat seat, the brush piece seat is fixed with brush piece body, the rheostat is rotatably arranged on the brush piece seat, one end of the float assembly is connected with the rheostat, the rheostat drives the float assembly to rotate in the process of rotation.

[0006] Preferably, the brush piece seat is provided with a rotating hole in the center, the rheostat seat is provided with a rotating shaft part corresponding to the rotating hole at one end close to the brush piece seat, the rotating shaft part is inserted into the rotating hole and connected with the brush piece seat, and the brush piece body reciprocates on the rheostat body in the process of rotation of the rheostat seat.

[0007] Preferably, the brush piece seat is provided with a brush piece positioning groove at the top end, the brush piece body is fixed in the brush piece positioning groove, and one end of the brush piece body is inserted into the brush piece positioning groove and connected with the rheostat body.

[0008] Preferably, the rheostat seat is provided with a float positioning end at the end face away from the brush piece seat, the rheostat seat is provided with a connecting hole corresponding to the rotating shaft part in the center, the float positioning end is provided with a float positioning hole, and one end of the float assembly is inserted into the connecting hole and connected with the rheostat seat after being bent towards the connecting hole through the float positioning hole.

[0009] Preferably, the float assembly comprises a float rod and a float body, the float rod has a first rod body, a second rod body and a third rod body, the first rod body and the third rod body are respectively bent from the second rod body, the first rod body is bent from the top end of the second rod body towards the connecting hole, the first rod body extends into the float positioning hole and is connected with the rheostat seat, the third rod body is bent from the bottom end of the second rod body towards the side away from the rheostat seat, the third rod body is connected with the float body, and the second rod body is arranged through the float positioning hole.

[0010] Preferably, the edge of the side end face of the brush piece seat close to the rheostat seat is protruded to form a brush piece seat limiting end, the rheostat seat is protruded to form a rheostat limiting end corresponding to the brush piece seat limiting end, and the brush piece seat limiting end and the rheostat limiting end are opposite to each other to limit the rotation of the rheostat.

[0011] Preferably, two brush piece seat limiting ends are arranged, and the two brush piece seat limiting ends are symmetrically arranged on both sides of the side end face of the brush piece seat close to the rheostat seat.

[0012] The beneficial effects of the utility model lie in that the rheostat is rotatably arranged on the brush piece seat, so that the rheostat can rotate around the rotation center. Therefore, when used in the structure of the liquid level sensor, the theoretical activity range of the float assembly can be close to 180°. With the same rotation radius of the float rod, the rheostat is connected with the brush piece seat through rotation connection and drives the rotation of the float assembly, so that the height of the float lifting is larger and the displayed fuel volume is more. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0014] ATTACHMENT Fig. 1 It is the structural schematic diagram of the present utility model;

[0015] ATTACHMENT Fig. 2 It is the structural exploded view of the present utility model. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described in combination with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present utility model.

[0017] The utility model will be further described below in conjunction with the drawings of the specification.

[0018] The utility model provides the following technical scheme:

[0019] As shown in the accompanying Figs. 1-2 The utility model discloses a rheostat rotating type liquid level sensor structure applied to fuel pump, including brush piece seat 1, rheostat and floater subassembly, and the rheostat includes rheostat seat 2 and rheostat body 3, and the rheostat body 3 is fixed on rheostat seat 2, fixed with brush piece body 4 on brush piece seat 1, the rheostat can be rotatably arranged on brush piece seat 1, one end of the floater subassembly is connected with the rheostat, the rheostat drives the rotation of floater subassembly during rotation. Specifically, in the design, by the rotatable arrangement of rheostat on brush piece seat 1, the rheostat can rotate around the rotation center. Therefore, in the structure of liquid level sensor, the theoretical activity range of floater subassembly can be close to 180 degrees. The same floater rod 12 radius of gyration, adopt the rotation connection and connect rheostat and brush piece seat 1, and drive the rotation of floater subassembly, can make the height of floater lifting more, and the display fuel volume is more. The brush piece is fixed on brush piece seat 1 and cannot move. The rheostat body 3 is assembled on rheostat seat 2, and rheostat seat 2 can rotate around the rotation shaft, and the brush piece moves on rheostat body 3 by the rotation of rheostat seat 2, to reach the purpose of resistance change.

[0020] Further, the rotating hole 5 is formed in the center of the brush piece seat 1, the rotation shaft part 6 corresponding to the rotating hole 5 is formed by protruding from one end of the rheostat seat 2 close to the brush piece seat 1, the rotation shaft part 6 is inserted into the rotating hole 5 and connected with the brush piece seat 1, and the brush piece body 4 reciprocates on the rheostat body 3 during the rotation of the rheostat seat 2. Specifically, in this embodiment, the rotation connection between the brush piece seat 1 and the rheostat seat 2 is realized by the rotation shaft part 6 inserted into the rotating hole 5, so that the brush piece body 4 can keep good contact with the rheostat body 3 during the rotation of the rheostat seat 2, and accurate resistance change is realized. In addition, the cooperation of the rotation shaft part 6 and the rotating hole 5 not only ensures the flexibility of rotation, but also improves the stability and durability of the entire liquid level sensor.

[0021] Further, the brush seat 1 top end is provided with a brush positioning slot 7, the brush body 4 is fixed in the brush positioning slot 7, and one end of the brush body 4 extends out of the brush positioning slot 7 and is connected with the rheostat body 3. Specifically, in this embodiment, by providing the brush positioning slot 7 on the brush seat 1 for fixing the brush body 4, it is ensured that the brush body 4 will not be displaced during the rotation of the rheostat seat 2, thereby ensuring the accuracy of the resistance change. The size and shape of the brush positioning slot 7 are matched with the brush body 4, so that the brush body 4 can be stably fixed on the brush seat 1, while allowing the brush body 4 to smoothly reciprocate in the positioning slot when the rheostat seat 2 rotates.

[0022] Further, the rheostat seat 2 is provided with a float positioning end 8 protruding from the side end face away from the brush seat 1, a connecting hole 9 corresponding to the rotating shaft part 6 is formed in the center of the rheostat seat 2, a float positioning hole 10 is formed on the float positioning end 8, and one end of the float assembly passes through the float positioning hole 10 and is bent towards the connecting hole 9 and extends into the connecting hole 9 to be connected with the rheostat seat 2. Specifically, in this embodiment, in order to ensure that the float assembly can move synchronously with the rotation of the rheostat, the float positioning end 8 with the float positioning hole 10 is provided, so that the float assembly can be stably fixed on the rheostat seat 2. The size and shape of the float positioning hole 10 are matched with the corresponding part of the float assembly, which ensures that the float assembly can smoothly move in the positioning hole when the liquid level changes, without unnecessary friction or jamming phenomenon. The connecting hole 9 is provided to coaxially connect the float assembly and the rheostat seat 2, thereby further improving the synchronicity and response speed of the entire liquid level sensor.

[0023] Further, the float assembly includes a float rod 12 and a float body 11, the float rod 12 has a first rod body 13, a second rod body 14 and a third rod body 15, the first rod body 13 and the third rod body 15 are respectively bent from the second rod body 14, the first rod body 13 is bent from the top end of the second rod body 14 towards the connecting hole 9, the first rod body 13 extends into the float positioning hole 10 and is connected with the rheostat seat 2, the third rod body 15 is bent from the bottom end of the second rod body 14 away from the rheostat seat 2, the third rod body 15 is connected with the float body 11, and the second rod body 14 passes through the float positioning hole 10.

[0024] Further, the brush seat 1 is protruded from the edge of the side end face close to the rheostat seat 2 to form a brush seat limiting end 16, the rheostat seat 2 is protruded from the brush seat limiting end 16 to form a rheostat limiting end 17, the brush seat limiting end 16 and the rheostat limiting end 17 are opposite to each other to limit the rotation of the rheostat. Specifically, in the embodiment, in order to prevent the rotation of the rheostat from being too large, the brush seat limiting end 16 and the rheostat limiting end 17 are arranged, when the rheostat rotates to a certain angle, the brush seat limiting end 16 contacts with the rheostat limiting end 17, so as to prevent the rheostat from continuing to rotate. The limiting design ensures that the rheostat can be accurately adjusted in the normal working range, and avoids damage or performance degradation caused by excessive rotation.

[0025] Further, the brush seat limiting end 16 is arranged in two, and the brush seat limiting end 16 is symmetrically arranged on both sides of the side end face close to the rheostat seat 2. Specifically, in the embodiment, in order to further improve the reliability of the limiting, the rheostat limiting end 17 is also arranged in two, and the rheostat limiting end 17 corresponds to the brush seat limiting end 16 one by one. In this way, when the rheostat is accidentally rotated in a large range during use, the two limiting ends can work at the same time, so as to ensure that the rotation of the rheostat is effectively controlled within a safe range.

[0026] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rheostat rotating type liquid level sensor structure applied to a fuel pump, comprising a brush holder, a rheostat and a float assembly, characterized in that: The rheostat includes a rheostat holder and a rheostat body. The rheostat body is fixed on the rheostat holder, and the brush body is fixed on the brush holder. The rheostat is rotatably mounted on the brush holder. One end of the float assembly is connected to the rheostat. During the rotation of the rheostat, the float assembly is driven to rotate.

2. The rheostat rotary type liquid level sensor structure for a fuel pump according to claim 1, characterized in that: A rotating hole is provided in the center of the brush holder, and a rotating shaft part corresponding to the rotating hole is protruded from one end of the rheostat holder near the brush holder. The rotating shaft part extends into the rotating hole and is rotatably connected to the brush holder. The brush body reciprocates on the rheostat body during the rotation of the rheostat holder.

3. The rheostat rotary type liquid level sensor structure for a fuel pump according to claim 2, characterized in that: The brush holder has a brush positioning groove at its top, the brush body is fixed in the brush positioning groove, and one end of the brush body extends out of the brush positioning groove and connects to the rheostat body.

4. The rheostat rotary type liquid level sensor structure for a fuel pump according to claim 1, characterized in that: The rheostat holder has a protruding float positioning end on the side away from the brush holder. A connecting hole corresponding to the rotating shaft is opened in the center of the rheostat holder. A float positioning hole is opened on the float positioning end. One end of the float assembly passes through the float positioning hole and bends towards the connecting hole and extends into the connecting hole to connect with the rheostat holder.

5. The structure of the rheostat-rotary liquid level sensor applied to a fuel pump according to claim 4, characterized in that: The float assembly includes a float rod and a float body. The float rod has a first rod body, a second rod body, and a third rod body. The first rod body and the third rod body are respectively formed by bending the second rod body. The first rod body is formed by bending the top end of the second rod body towards the connection hole. The first rod body extends into the float positioning hole and connects with the rheostat seat. The third rod body is formed by bending the bottom end of the second rod body towards the side away from the rheostat seat. The third rod body is connected to the float body. The second rod body is disposed through the float positioning hole.

6. The structure of the rheostat-rotary liquid level sensor applied to a fuel pump according to claim 1, characterized in that: The edge of the brush holder near the rheostat holder protrudes to form a brush holder limiting end, and the rheostat holder protrudes to form a rheostat limiting end corresponding to the brush holder limiting end. The brush holder limiting end and the rheostat holder limiting end are connected to limit the rotation of the rheostat.

7. The structure of the rheostat-rotary liquid level sensor applied to a fuel pump according to claim 6, characterized in that: Two limiting ends are provided for the brush holder, and the limiting ends are symmetrically arranged on both sides of the end face of the brush holder near the rheostat holder.

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