Secondary air pump for controlling automobile exhaust emission

Abstract

The utility model discloses a secondary air pump for controlling automobile exhaust emission, which comprises an impeller chamber and a front end cover, a plurality of groups of threaded pipes are fixedly arranged on the outer wall of the front end cover, a plurality of groups of threaded cylinders are fixedly arranged on the outer wall of the impeller chamber, and screws are arranged at the tops of the threaded pipes. The working end of the screw penetrates through the interior of the threaded pipe and extends into the threaded cylinder, and a positioning mechanism is arranged on the front end cover. By means of the designed positioning mechanism, the screw can be positioned when the secondary air pump is used, the top annular hook-and-loop fastener is attached to the bottom annular hook-and-loop fastener and matched with the spring in an extrusion mode to position the screw, and the situation that the screw is loosened due to the fact that the screw is affected by vibration in the using process is avoided; the firmness of connection and fixation between the front end cover and the impeller chamber on the secondary air pump is improved, and the stability and performance of the secondary air pump in use are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of secondary air pumps, and in particular relates to a secondary air pump for controlling automobile tail gas emissions. Background Art

[0002] The secondary air pump sends air to the three-way catalytic converter when the engine is cold, so that the exhaust gas can meet the oxygen in the air for secondary combustion, increase the temperature of the three-way catalytic converter, make the three-way catalytic converter reach the working temperature as soon as possible, control exhaust emissions, reduce harmful substances in the exhaust gas, and play an environmental protection role.

[0003] The Chinese patent application No. 201920767697.3 discloses a secondary air pump body structure for controlling vehicle exhaust emissions. The patent provides a raised annular air flow channel on the front end cover, so that more gas is output through the impeller body, thereby maximizing the efficiency of the brushless output end. However, the threaded tube on the front end cover and the threaded tube in the impeller chamber are fixedly connected by screws, and the secondary air pump is installed on the car for use. When the car is driving, the secondary air pump will vibrate, and the secondary air pump will also vibrate when working. These vibrations will cause multiple sets of screws on the secondary air pump to rotate and loosen, causing the connection between the front end cover and the impeller chamber to loosen, reducing the firmness of the connection and fixing between the front end cover and the impeller chamber, and affecting the stability and performance of the secondary air pump. For this reason, we propose a secondary air pump for controlling automobile exhaust emissions. Utility Model Content

[0004] The purpose of the utility model is to provide a secondary air pump for controlling automobile exhaust emissions, so as to solve the problem proposed in the above background technology that the secondary air pump will vibrate when the automobile is driving, and the secondary air pump will also vibrate when working, and these vibrations will cause multiple sets of screws on the secondary air pump to rotate and loosen, causing the connection between the front end cover and the impeller chamber to loosen, thereby reducing the problem of the firmness of the connection and fixing between the front end cover and the impeller chamber.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a secondary air pump for controlling automobile exhaust emissions, comprising an impeller chamber and a front end cover, the outer wall of the front end cover is fixedly provided with multiple groups of threaded tubes, the outer wall of the impeller chamber is fixedly provided with multiple groups of threaded barrels, the top of the threaded tube is provided with a screw, the working end of the screw passes through the interior of the threaded tube and extends to the interior of the threaded barrel, the front end cover is provided with a positioning mechanism, the positioning mechanism comprises an upper ring, a fixing ring and multiple groups of cylinder bodies, the bottom of the cylinder body is fixedly provided with an upper ring plate, the bottom of the upper ring plate is fixedly provided with a top annular Velcro, the top outer side of the screw is sleeved and fixed with a lower ring plate, the top of the lower ring plate is fixedly provided with a bottom annular Velcro, the bottom annular Velcro and the top annular Velcro are connected by pasting, and two groups of movable strips and movable columns are respectively fixedly provided on the top of the cylinder body, and the outer side of the movable column is sleeved with a spring.

[0006] Preferably, a plurality of groups of square grooves and circular grooves are respectively opened inside the fixed ring, the top of the movable strip passes through the inside of the square groove and extends to the surface of the upper ring, and the top of the movable column passes through the inside of the circular groove and extends to the surface of the upper ring.

[0007] Preferably, the top of the spring is fixedly connected to the fixing ring, and the bottom of the spring is fixedly connected to the cylinder.

[0008] Preferably, the upper ring is fixedly connected to the top of the movable strip and the top of the movable column, and the fixed ring is sleeved and fixed on the outside of the front end cover.

[0009] Preferably, two groups of limiting members for limiting the upper ring are arranged on the top of the front end cover, and the limiting members include a fixed transverse ring and a movable transverse rod. A rubber ring is fixedly arranged on the inner wall of the fixed transverse ring, and the end of the movable transverse rod passes through the interior of the rubber ring.

[0010] Preferably, an air intake duct is fixedly provided on the top of the front end cover, an exhaust duct is fixedly provided on the impeller chamber, and an impeller is provided inside the impeller chamber.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The utility model has a positioning mechanism designed to position the screws when the secondary air pump is in use. The top ring Velcro is attached to the bottom ring letter sticker and the screws are positioned by extrusion of the spring, thereby preventing the screws from being loosened due to vibration during use. The firmness of the connection between the front end cover and the impeller chamber on the secondary air pump is improved, thereby improving the stability and performance of the secondary air pump during use.

[0013] (2) The utility model is designed with a limiter so that when removing or installing the screws, the upper ring can be moved upward to a suitable position and then limited by the limiter, so that the upper ring, the cylinder, etc. are all raised to a certain height, which is convenient for removing or installing the screws with a larger space for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 For the utility model Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0016] Figure 3 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 4 For the utility model Figure 3 The enlarged structural diagram of the middle B part;

[0018] Figure 5 This is a schematic diagram of the positioning mechanism structure of the utility model;

[0019] Figure 6 It is a schematic diagram of the structure of the lower ring plate and the bottom annular Velcro of the utility model;

[0020] Figure 7 This is a bottom view of the cylinder structure of the utility model;

[0021] In the figure: 100, front end cover; 101, air inlet duct; 102, threaded pipe; 103, threaded cylinder; 104, exhaust duct; 105, impeller chamber; 106, screw; 200, upper ring; 201, fixed ring; 202, cylinder; 203, movable strip; 204, spring; 205, movable column; 206, upper ring plate; 207, lower ring plate; 208, bottom ring Velcro; 209, top ring Velcro; 300, movable cross bar; 301, fixed cross ring; 302, rubber ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to 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 the embodiments. Based on the embodiments in 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.

[0023] Example 1

[0024] See also Figure 1 , Figure 2 , Figure 3, Figure 4 , Figure 5 , Figure 6 and Figure 7 The utility model provides a technical solution: a secondary air pump for controlling automobile exhaust emissions, comprising an impeller chamber 105 and a front end cover 100, wherein the outer wall of the front end cover 100 is fixedly provided with a plurality of groups of threaded tubes 102, the threaded tubes 102, the threaded barrels 103 and the screws 106 are connected by threads, the outer wall of the impeller chamber 105 is fixedly provided with a plurality of groups of threaded barrels 103, the top of the threaded tube 102 is provided with a screw 106, the working end of the screw 106 passes through the interior of the threaded tube 102 and extends to the interior of the threaded barrel 103, the front end cover 100 is provided with a positioning mechanism, the positioning mechanism comprises an upper ring 200, a fixing ring 201 and a plurality of groups of barrels 202, the bottom of the barrel 202 is fixedly provided with an upper The ring plate 206, the bottom of the upper ring plate 206 is fixedly provided with a top ring Velcro 209, and the top ring Velcro 209 can be connected with the bottom ring Velcro 208 by pasting. The top outer side of the screw 106 is sleeved with a lower ring plate 207, and the top of the lower ring plate 207 is fixedly provided with a bottom ring Velcro 208, and the bottom ring Velcro 208 and the top ring Velcro 209 are connected by pasting. Two groups of movable strips 203 and movable columns 205 are respectively fixedly provided on the top of the cylinder 202, and the outer sleeve of the movable column 205 is provided with a spring 204, which can squeeze the cylinder 202 downward to make the top ring Velcro 209 and the bottom ring Velcro 208 stick more firmly.

[0025] The interior of the fixed ring 201 is provided with a plurality of groups of square grooves and circular grooves, the movable strip 203 can move up and down in the square groove, the movable column 205 can move up and down in the circular groove, the top of the movable strip 203 passes through the interior of the square groove and extends to the surface of the upper ring 200, and the top of the movable column 205 passes through the interior of the circular groove and extends to the surface of the upper ring 200;

[0026] The top of the spring 204 is fixedly connected to the fixing ring 201, and the bottom of the spring 204 is fixedly connected to the cylinder 202;

[0027] The upper ring 200 is fixedly connected to the top of the movable strip 203 and the top of the movable column 205 , and the fixed ring 201 is sleeved and fixed on the outside of the front end cover 100 .

[0028] The utility model adopts a positioning mechanism designed to position the screw 106 when the secondary air pump is in use. The top ring-shaped Velcro 209 is attached to the bottom ring-shaped Velcro 208 and squeezed together with the spring 204 to position the screw 106, thereby preventing the screw 106 from being loosened due to vibration during use, improving the firmness of the connection between the front end cover 100 and the impeller chamber 105 on the secondary air pump, and improving the stability and performance of the secondary air pump during use.

[0029] Example 2

[0030] Based on Example 1, please refer to Figure 1 , Figure 2 and Figure 3 Two sets of limiting parts for limiting the upper ring 200 are arranged on the top of the front end cover 100, and the limiting parts include a fixed transverse ring 301 and a movable transverse rod 300. A rubber ring 302 is fixedly arranged on the inner wall of the fixed transverse ring 301. The rubber ring 302 has a limiting function for limiting the movable transverse rod 300 to prevent the movable transverse rod 300 from detaching from the fixed transverse ring 301. The end of the movable transverse rod 300 passes through the inside of the rubber ring 302.

[0031] The utility model is designed with a limiting member, when disassembling and installing the screw 106, the upper ring 200 can be moved upward to a suitable position and then limited by the limiting member, so that the upper ring 200, the cylinder 202, etc. are all raised to a certain height, which is convenient for disassembling and installing the screw 106 with a larger space for operation.

[0032] In this embodiment, an air intake duct 101 is fixedly provided on the top of the front end cover 100 , an exhaust duct 104 is fixedly provided on the impeller chamber 105 , and an impeller is provided inside the impeller chamber 105 .

[0033] The working principle and use process of this utility model:

[0034] When the utility model is in use, the upper ring 200 is first moved upward to a suitable position, and then the movable cross bar 300 is moved outward, and finally the end of the movable cross bar 300 is moved to the bottom position of the upper ring 200. At this time, the upper ring 200 is released, and the upper ring 200 moves downward and contacts the end surface of the movable cross bar 300. At this time, the upper ring 200 is limited by the movable cross bar 300. During the upward movement of the upper ring 200, the movable long strip 203 and the movable column 205 are driven to move. At this time, the spring 204 is affected and begins to compress, thereby driving the cylinder 202, the upper ring plate 206 and the top annular Velcro 209 to move, and then the screw 106 is screwed into the threaded tube 102 and the threaded tube 103. The front end cover 100 and the impeller chamber 105 are connected and fixed together. At this time, the movable cross bar 300 is moved to the center position close to the front end cover 100, and then the end of the movable cross bar 300 is separated from the lower surface of the upper ring 200, and then the operation is carried out according to the opposite principle of the upward movement of the upper ring 200. Finally, the top annular Velcro 209 at the bottom of the upper ring plate 206 is glued and connected with the bottom annular Velcro 208 on the top outer wall of the screw 106 below. At this time, the spring 204 presses the cylinder 202 downward, so that the top annular Velcro 209 and the bottom annular Velcro 208 are more firmly glued together, thereby positioning the screw 106 and reducing the possibility of the screw 106 being affected by vibration and rotating and loosening during use.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A secondary air pump for controlling automobile exhaust emissions, comprising an impeller chamber (105) and a front end cover (100), wherein the outer wall of the front end cover (100) is fixedly provided with a plurality of groups of threaded tubes (102), the outer wall of the impeller chamber (105) is fixedly provided with a plurality of groups of threaded barrels (103), a screw (106) is provided at the top of the threaded tube (102), a working end of the screw (106) passes through the interior of the threaded tube (102) and extends to the interior of the threaded barrel (103), characterized in that: The front end cover (100) is provided with a positioning mechanism, which comprises an upper ring (200), a fixing ring (201) and a plurality of groups of cylinders (202); an upper ring plate (206) is fixedly provided at the bottom of the cylinder (202); a top ring Velcro (209) is fixedly provided at the bottom of the upper ring plate (206); a lower ring plate (207) is sleeved and fixedly provided on the outer side of the top of the screw (106); a bottom ring Velcro (208) is fixedly provided on the top of the lower ring plate (207); the bottom ring Velcro (208) and the top ring Velcro (209) are connected by gluing; two groups of movable strips (203) and movable columns (205) are respectively fixedly provided at the top of the cylinder (202); a spring (204) is sleeved on the outside of the movable column (205).

2. A secondary air pump for controlling automobile exhaust emissions according to claim 1, characterized in that: The interior of the fixed ring (201) is provided with a plurality of groups of square grooves and circular grooves, the top of the movable strip (203) passes through the interior of the square groove and extends to the surface of the upper ring (200), and the top of the movable column (205) passes through the interior of the circular groove and extends to the surface of the upper ring (200).

3. A secondary air pump for controlling automobile exhaust emissions according to claim 2, characterized in that: The top of the spring (204) is fixedly connected to the fixing ring (201), and the bottom of the spring (204) is fixedly connected to the cylinder (202).

4. A secondary air pump for controlling automobile exhaust emissions according to claim 3, characterized in that: The upper ring (200) is fixedly connected to the top of the movable strip (203) and the top of the movable column (205), and the fixed ring (201) is sleeved and fixed on the outside of the front end cover (100).

5. A secondary air pump for controlling automobile exhaust emissions according to claim 4, characterized in that: Two groups of limiting members for limiting the position of the upper ring (200) are arranged on the top of the front end cover (100), and the limiting members include a fixed transverse ring (301) and a movable transverse rod (300). A rubber ring (302) is fixedly arranged on the inner wall of the fixed transverse ring (301), and an end of the movable transverse rod (300) passes through the interior of the rubber ring (302).

6. A secondary air pump for controlling automobile exhaust emissions according to claim 1, characterized in that: An air intake duct (101) is fixedly arranged on the top of the front end cover (100), an exhaust duct (104) is fixedly arranged on the impeller chamber (105), and an impeller is arranged inside the impeller chamber (105).

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