Connecting rod structure of inflator pump and inflator pump

Abstract

The utility model discloses an inflator pump connecting rod structure and an inflator pump, and the inflator pump connecting rod structure comprises a piston connecting rod, and a piston terminal is fixed at one end of the piston connecting rod; the piston groove is formed in the circumferential direction of the piston terminal so that the piston can be arranged on the piston groove in a sleeving mode; the piston comprises an annular piston body, and spherical chamfers are arranged at the corners of the periphery of the annular piston body. One side face of the annular piston body is further provided with a compression cavity. According to the inflator pump connecting rod structure and the inflator pump, a conventional piston is integrally replaced with the annular body, the spherical chamfer is arranged at the corner, when the piston runs to the maximum swing angle of 90 degrees by means of the external piston connecting rod, the spherical chamfer on the annular piston body can make full contact with the inner wall of the piston cylinder body, and meanwhile the spherical chamfer can make full contact with the inner wall of the piston cylinder body. And in cooperation with the design of the compression cavity, the annular piston body still has a certain compression deformation quantity, the requirement for tight contact between the annular piston body and the piston cylinder body is met, and the inflation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air pump technology, and in particular to an air pump connecting rod structure and an air pump. Background Technology

[0002] With the increasing popularity of automobiles and the widespread use of bicycles, electric bicycles, motorcycles, etc., air pumps have become one of the most commonly used daily necessities in people's lives. Conventional air pumps are usually driven by an electric motor to drive a gear transmission mechanism, and the output gear of the gear transmission mechanism drives the piston to reciprocate in the cylinder through a cam mechanism, thereby generating compressed air to inflate and pressurize tires and other equipment.

[0003] For example, Chinese Patent CN 219827058 U discloses an air pump mechanism and an air pump. The air pump mechanism includes a main frame, a cylinder, a piston rod assembly, and a motor for driving the piston rod assembly. The main frame includes a bottom mounting plate and a side mounting plate perpendicularly connected to each other, and a first reinforcing plate and a second reinforcing plate connecting the bottom mounting plate and the side mounting plate. The motor is mounted on the bottom mounting plate, and the cylinder is mounted on the side mounting plate. The motor drives the piston rod assembly through a drive gear assembly. The air pump mechanism structure of this application achieves miniaturization while maintaining structural strength and stability. It solves the defects of similar prior art products, such as short service life and poor structural stability, which lead to higher mechanism current, increased power consumption, poor inflation efficiency, and longer inflation time. It can reduce resource waste and improve user experience.

[0004] The aforementioned air pump has certain defects found in practical applications. Because the piston inside the air pump has a triangular truncated pyramidal cross-section, when the piston is subjected to external connecting rod assembly and reaches its maximum swing angle of approximately 90°, such as... Figure 10 As shown, the compression of piston 1-1 will be reduced to a minimum or even zero. At the same time, due to the cross-sectional design of triangular platform 1-2, the effective contact area between the outside of piston 1-1 and cylinder 1-3 is small in this state, resulting in a significant decrease in the air tightness of piston 1-1 and low charging efficiency. To address this, a charging pump connecting rod structure and a charging pump are proposed. Utility Model Content

[0005] Therefore, it is necessary to provide an air pump connecting rod structure and an air pump to address the above-mentioned technical problems. The conventional piston is replaced with a ring body, and the corners are designed with rounded chamfers so that the piston can fully contact the cylinder.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An air pump connecting rod structure includes: a piston connecting rod, with a piston terminal fixed at one end of the piston connecting rod;

[0008] A piston groove is formed along the circumferential direction of the piston terminal to allow the piston to be fitted thereon;

[0009] The piston includes an annular piston body, and each of the outer corners of the annular piston body has a spherical chamfer.

[0010] One side of the annular piston body also has a compression chamber, which allows the spherical chamfer on the annular piston body to come into contact with the cylinder wall for compression.

[0011] Furthermore, the outer circumference of the piston terminal near the piston connecting rod has an arc-shaped chamfer.

[0012] Furthermore, the end of the piston rod away from the piston terminal has a connecting end.

[0013] An air pump includes an air pump connecting rod structure, a piston cylinder sleeved on the piston surface and a drive assembly connected to the connecting end, and an air pipe assembly connected to one side of the piston cylinder.

[0014] The drive assembly includes an eccentric wheel movably connected to the connecting end, a driven gear fixed to the surface of the eccentric wheel, and a driving gear meshing with the driven gear.

[0015] Furthermore, the piston cylinder extends outward to have a fixing portion;

[0016] A connecting shaft is connected to one side of the driven gear, and the connecting shaft is movably mounted on the fixed part via a bearing;

[0017] One side of the drive gear is movably assembled with the fixed part via a bearing.

[0018] Furthermore, a drive motor is coaxially fixedly mounted on one side of the drive gear, and a fastening bolt is threaded through the fixed part to connect with the drive motor, so that the drive motor is fixed to the surface of the fixed part.

[0019] Furthermore, a protective element is provided on the surface of both the driven gear and the driving gear. The protective element protects the meshing point of the driven gear and the driving gear. The protective element includes an upper protective housing and a lower protective housing. The lower protective housing is fixedly connected to the fixing part by connecting bolts.

[0020] The upper and lower protective housings together have receiving grooves for inserting the driven gear and the driving gear.

[0021] Furthermore, a first clearance groove is provided on one side of the upper protective shell and the lower protective shell for clearance at the connection between the piston terminal and the eccentric wheel;

[0022] The upper protective shell and the lower protective shell are provided with a second clearance groove and a third clearance groove on the other side. The connecting shaft and the drive gear can avoid each other due to the action of the second clearance groove and the third clearance groove.

[0023] Furthermore, a movable screw is hinged to one side of the bottom of the upper protective housing, and an anti-slip nut is threaded through the surface of the movable screw. A push-in groove is opened on the surface of the lower protective housing for the movable screw to be flipped and inserted, and a fixing groove is also opened below the push-in groove. Rotating the anti-slip nut causes it to abut against the top wall of the fixing groove to position the movable screw.

[0024] Furthermore, a plug is fixed to the other side of the bottom of the upper protective housing, and a corresponding slot is provided on the surface of the lower protective housing.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The air pump connecting rod structure and air pump provided by this utility model replace the conventional piston as a whole with an annular body and design a spherical chamfer at the corner. When the piston is subjected to the external piston connecting rod and runs to the maximum swing angle of 90°, the spherical chamfer on the annular piston body can fully contact the inner wall of the piston cylinder. At the same time, in conjunction with the design of the compression chamber, the annular piston body can still have a certain amount of compressibility deformation, ensuring close contact between itself and the piston cylinder and improving the inflation efficiency.

[0027] By using the chamfered design, motion interference between the piston terminal and the piston cylinder can be avoided when the piston connecting rod is at its maximum swing angle of 90°, thus preventing wear on the inner wall of the piston cylinder.

[0028] By designing protective elements, the meshing point can be protected when the driving gear and driven gear are meshing, thereby reducing the impact of external instability on the meshing point, ensuring meshing accuracy, and achieving more stable reciprocating motion of the piston for stable inflation applications. At the same time, rotating the anti-slip nut and flipping the movable screw can quickly disassemble the upper protective shell for convenient application in actual maintenance conditions, making it more practical. Attached Figure Description

[0029] Figure 1 A schematic diagram of the air pump connecting rod structure and the air pump provided by this utility model;

[0030] Figure 2 A schematic diagram of the air pump connecting rod structure and the disassembly structure of the air pump provided by this utility model.

[0031] Figure 3 A schematic diagram of the air pump connecting rod structure and the air pump drive assembly structure provided by this utility model.

[0032] Figure 4 A cross-sectional view of the connecting rod structure of the air pump and the piston cylinder of the air pump in the first state provided by this utility model.

[0033] Figure 5 A cross-sectional view of the connecting rod structure of the air pump and the piston cylinder of the air pump in the second state provided by this utility model.

[0034] Figure 6 A schematic diagram of the air pump connecting rod structure and the protective element structure of the air pump provided by this utility model;

[0035] Figure 7 A schematic diagram of the second state structure of the air pump connecting rod structure and the protective element of the air pump provided by this utility model.

[0036] Figure 8 A schematic diagram showing the disassembly structure of the air pump connecting rod and the protective components of the air pump provided by this utility model.

[0037] Figure 9 The present invention provides an air pump connecting rod structure and an air pump. Figure 6 Enlarged structural diagram at point A in the middle;

[0038] Figure 10 A schematic diagram of the structure of a conventional triangular platform cross-section piston as described in the background art provided for this utility model.

[0039] The markings in the diagram are explained as follows:

[0040] Piston connecting rod 1, piston terminal 11, piston groove 12, arc chamfer 13, connecting end 14;

[0041] Piston 2, annular piston body 21, spherical chamfer 22, compression chamber 23;

[0042] Piston cylinder 3, fixing part 31;

[0043] Drive assembly 4, eccentric wheel 41, driven gear 42, driving gear 43, drive motor 44, fastening bolt 45;

[0044] Connecting shaft 420;

[0045] Protective element 5, upper protective housing 51, lower protective housing 52, receiving groove 53, first clearance groove 54, second clearance groove 55, third clearance groove 56, connecting bolt 57;

[0046] 510 movable screw, 511 anti-slip nut, 513 insert block;

[0047] Push-in slot 520, fixing slot 521, slot 522;

[0048] Tracheal assembly 6. Detailed Implementation

[0049] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0050] As described in the background section, because the piston in the air pump has a triangular truncated pyramidal cross-section, when the piston is subjected to external connecting rod assembly and moves to approximately the maximum swing angle of 90°, such as Figure 10 As shown, the piston compression will drop to a minimum or even zero. At the same time, due to the cross-sectional design of the triangular platform, the effective contact area between the piston exterior and the cylinder is small in this state, resulting in a significant decrease in piston airtightness.

[0051] To solve this technical problem, this utility model provides an air pump connecting rod structure, which is applied to an air pump.

[0052] For details, please refer to Figures 1-6 The air pump connecting rod structure and the air pump specifically include:

[0053] Piston connecting rod 1, with piston terminal 11 fixed at one end of piston connecting rod 1;

[0054] A piston groove 12 is formed along the circumferential direction of the piston terminal 11 for the piston 2 to be fitted thereon;

[0055] The piston 2 includes an annular piston body 21, and each of the outer corners of the annular piston body 21 has a spherical chamfer 22.

[0056] The annular piston body 21 also has a compression chamber 23 on one side. The compression chamber 23 allows the spherical chamfer 22 on the annular piston body 21 to be compressed when it comes into contact with the cylinder wall.

[0057] The air pump connecting rod structure provided by this utility model replaces the conventional piston as a whole with an annular body, and designs a spherical chamfer 22 at the corner. When the piston 2 is driven by the external piston connecting rod 21 to the maximum swing angle of 90°, the spherical chamfer 22 on the annular piston body 21 can fully contact the inner wall of the piston cylinder 3. At the same time, in conjunction with the design of the compression chamber 23, the annular piston body 21 can still have a certain amount of compressibility deformation, ensuring close contact between itself and the piston cylinder 3 and improving the air filling efficiency.

[0058] The air pump provided by this utility model, through the design of the protection element 5, can protect the meshing point when the driving gear 43 and the driven gear 42 are meshing with each other, thereby reducing the impact of external instability on the meshing point, ensuring the meshing accuracy, and thus realizing a more stable reciprocating motion of the piston, achieving a more stable air inflation.

[0059] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0060] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0061] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0062] Example 1

[0063] Please refer to Figures 1-10 An air pump connecting rod structure includes: a piston connecting rod 1, with a piston terminal 11 fixed at one end of the piston connecting rod 1; and a piston groove 12, which is opened along the circumferential direction of the piston terminal 11 for the piston 2 to be sleeved thereon.

[0064] The piston 2 includes an annular piston body 21, and each of the outer corners of the annular piston body 21 has a spherical chamfer 22. One side of the annular piston body 21 also has a compression chamber 23. The compression chamber 23 allows the spherical chamfer 22 on the annular piston body 21 to come into contact with the cylinder wall for compression.

[0065] like Figure 5 and Figure 6As shown, this is the maximum angle state of the uniform piston 2 moving inside the piston cylinder 3. In this state, the spherical chamfer 22 on the annular piston 21 can fully contact the inner wall of the piston cylinder 3. During the contact process, the area of ​​the spherical chamfer 22 is subjected to the resisting force of the piston cylinder 3 and undergoes partial deformation to better fit the inner wall of the piston cylinder 3, thereby achieving stable contact between the annular piston 21 and the piston cylinder 3 and ensuring the efficiency of inflation.

[0066] Meanwhile, in conjunction with the design of the compression chamber 23, when the end face of the arc chamfer 13 is close to or far from the inner wall of the piston cylinder 3, the compressed arc chamfer 13 can be elastically reset, thereby ensuring its contact with the inner wall of the piston cylinder 3, thus further improving the sealing effect when the piston 2 reciprocates.

[0067] And such Figure 10 As shown, the conventional piston cross-section is a triangular frustum shape. When it moves to its maximum angle, the bottom triangular end will contact the piston cylinder. This will result in a small contact area between the piston and the piston cylinder, which will easily lead to insufficient contact and thus reduce the inflation efficiency. In this embodiment, the annular piston body 21 is designed with arc chamfers 13 at multiple corners. This increases the sufficient contact between the annular piston body 21 and the piston cylinder 3 during reciprocating motion, ensuring stable inflation.

[0068] As a further optimization of this embodiment, the outer circumference of the piston terminal 11 is formed with an arc chamfer 13 on the side close to the piston connecting rod 1, and the end of the piston connecting rod 1 away from the piston terminal 11 has a connecting end 14. Through the design of the arc chamfer 13, when the piston connecting rod 1 is near the maximum swing angle of 90°, motion interference between the piston terminal 11 and the piston cylinder 3 can be avoided, thus preventing wear on the inner wall of the piston cylinder 3.

[0069] Example 2

[0070] The air pump connecting rod structure and air pump provided in Embodiment 1 are further optimized, specifically, as follows: Figure 4 As shown, an air pump includes an air pump connecting rod structure as described in Embodiment 1 above, and also includes a piston cylinder 3 sleeved on the surface of the piston 2 and a drive assembly 4 connected to the connecting end 14. An air pipe assembly 6 is connected to one side of the piston cylinder 3.

[0071] The drive assembly 4 includes an eccentric wheel 41 movably connected to the connecting end 14, a driven gear 42 fixed to the surface of the eccentric wheel 41, and a driving gear 43 meshing with the driven gear 42. A protective element 5 is provided on the surfaces of the driven gear 42 and the driving gear 43. The meshing point of the driven gear 42 and the driving gear 43 can be protected by the protective element 5.

[0072] In this embodiment, the design of the protective element 5 can protect the meshing point when the driving gear 43 and the driven gear 42 are meshing with each other, thereby reducing the impact of external instability on the meshing point, ensuring the meshing accuracy, and thus realizing a more stable reciprocating motion of the piston and a more stable inflation operation.

[0073] The piston cylinder 3 extends outward and has a fixing part 31. A connecting shaft 420 is connected to one side of the driven gear 42. The connecting shaft 420 is movably mounted on the fixing part 31 through a bearing. One side of the driving gear 43 is movably mounted to the fixing part 31 through a bearing.

[0074] A drive motor 44 is coaxially fixedly mounted on one side of the drive gear 43, and a fastening bolt 45 is threaded through the fixing part 31 to connect with the drive motor 44, so that the drive motor 44 is fixed to the surface of the fixing part 31.

[0075] Specifically, when using the air pump in this embodiment, the drive motor 44 is first connected to an external power source, and the drive motor 44 is started to drive the drive gear 43 to rotate. Since the drive gear 43 and the driven gear 42 are meshed, the driven gear 42, which is driven by the drive, will drive the eccentric wheel 41 on it to move. The eccentric wheel 41 will drive the piston connecting rod 1 on it to reciprocate, so that the piston 2 in the piston cylinder 3 can slide back and forth. During the reciprocating sliding of the piston 2, the air pump can inflate the external equipment.

[0076] Example 3

[0077] The air pump connecting rod structure and air pump provided in Embodiment 1 or 2 are further optimized, such as... Figure 8 , Figure 9 and Figure 10 As shown, the protective element 5 includes an upper protective housing 51 and a lower protective housing 52; the lower protective housing 52 is fixedly connected to the fixing part 31 by a connecting bolt 57, and the lower protective housing 52 can also be disassembled by removing the connecting bolt 57;

[0078] The upper protective housing 51 and the lower protective housing 52 are provided with a receiving groove 53 for the insertion of the driven gear 42 and the driving gear 43.

[0079] A first clearance groove 54 is provided on one side of the upper protective shell 51 and the lower protective shell 52 for clearance at the connection between the piston terminal 11 and the eccentric wheel 41;

[0080] The upper protective shell 51 and the lower protective shell 52 are provided with a second clearance groove 55 and a third clearance groove 56 on the other side. The connecting shaft 420 and the driving gear 43 can be made to avoid each other by the action of the second clearance groove 55 and the third clearance groove 56.

[0081] In the actual assembly process, the lower protective housing 52 is first fitted onto the surface of the driving gear 43 and the driven gear 42 at the bottom, and the first clearance groove 54 is made to avoid the connection between the piston terminal 11 and the eccentric wheel 41. The second clearance groove 55 and the third clearance groove 56 are made to avoid the corresponding connecting shaft 420 and driving gear 43 respectively. Then, the connecting bolt 57 is rotated on the surface of the fixing part 31 to connect and fix one end of it to the lower protective housing 52. Then, the upper protective housing 51 is installed to complete the protection of the meshing part of the driving gear 43 and the driven gear 42.

[0082] Example 4

[0083] The air pump connecting rod structure and air pump provided in Embodiment 3 are further optimized, such as... Figure 10 As shown, a movable screw 510 is hinged to one side of the bottom of the upper protective housing 51. An anti-slip nut 511 is threaded through the surface of the movable screw 510. A push-in groove 520 is formed on the surface of the lower protective housing 52 for the movable screw 510 to be rotated and inserted. A fixing groove 521 is also formed below the push-in groove 521. Rotating the anti-slip nut 511 causes it to abut against the top wall of the fixing groove 521, thus positioning the movable screw 510.

[0084] A plug 513 is fixed to the other side of the bottom of the upper protective shell 51, and a slot 522 is correspondingly opened on the surface of the lower protective shell 52.

[0085] After the lower protective housing 52 is installed in Embodiment 3, the upper protective housing 51 is aligned with the surface of the lower protective housing 52. The movable screw 510 is then flipped to insert into the corresponding push-in groove 520, and the anti-slip nut 511 on the movable screw 510 is inserted into the corresponding fixing groove 521. The anti-slip nut 511 is then rotated to abut against the top wall of the fixing groove 521. At this time, the insert block 513 has been inserted into the corresponding slot 522, completing the assembly of the protective element 5. Similarly, the anti-slip nut 511 is rotated in the opposite direction to release the abutment between it and the fixing groove 521. The movable screw 510 is then flipped outward to disassemble the upper protective housing 51, thus meeting the actual maintenance application.

[0086] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0087] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A connecting rod structure for an air pump, characterized in that, It includes: Piston connecting rod (1), with a piston terminal (11) fixed at one end of the piston connecting rod (1). A piston groove (12) is provided along the circumferential direction of the piston terminal (11) for the piston (2) to be fitted thereon; The piston (2) includes an annular piston body (21), and each of the outer corners of the annular piston body (21) has a spherical chamfer (22). One side of the annular piston body (21) also has a compression chamber (23). The compression chamber (23) allows the spherical chamfer (22) on the annular piston body (21) to come into contact with the cylinder wall for compression.

2. The air pump connecting rod structure according to claim 1, characterized in that, The piston terminal (11) has an arc chamfer (13) on the side of its outer circumference near the piston rod (1).

3. The air pump connecting rod structure according to claim 1, characterized in that, The piston rod (1) has a connecting end (14) at the end away from the piston terminal (11).

4. An air pump, comprising the air pump connecting rod structure according to any one of claims 1-3, characterized in that, It also includes a piston cylinder (3) sleeved on the surface of the piston (2) and a drive assembly (4) connected to the connection end (14). A gas pipe assembly (6) is connected to one side of the piston cylinder (3). The drive assembly (4) includes an eccentric wheel (41) movably connected to the connecting end (14), a driven gear (42) fixed to the surface of the eccentric wheel (41), and a driving gear (43) meshing with the driven gear (42).

5. An air pump according to claim 4, characterized in that, The piston cylinder (3) extends outward and has a fixing part (31); A connecting shaft (420) is connected to one side of the driven gear (42), and the connecting shaft (420) is movably mounted on the fixed part (31) via a bearing; One side of the drive gear (43) is movably assembled with the fixed part (31) via a bearing.

6. An air pump according to claim 5, characterized in that, A drive motor (44) is coaxially fixedly mounted on one side of the drive gear (43), and a fastening bolt (45) is threaded through the fixing part (31) and connected to the drive motor (44) so ​​that the drive motor (44) is fixed to the surface of the fixing part (31).

7. An air pump according to claim 5, characterized in that, A protective element (5) is provided on the surface of the driven gear (42) and the driving gear (43). The meshing part of the driven gear (42) and the driving gear (43) can be protected by the protective element (5). The protective element (5) includes an upper protective housing (51) and a lower protective housing (52), and the lower protective housing (52) is fixedly connected to the fixing part (31) by connecting bolts (57); The upper protective housing (51) and the lower protective housing (52) are provided with a receiving groove (53) for the insertion of the driven gear (42) and the driving gear (43).

8. An air pump according to claim 7, characterized in that, The upper protective housing (51) and the lower protective housing (52) have a first clearance groove (54) on one side for clearance at the connection between the piston terminal (11) and the eccentric wheel (41); The upper protective housing (51) and the lower protective housing (52) are provided with a second clearance groove (55) and a third clearance groove (56) on the other side. The connecting shaft (420) and the driving gear (43) can be made to avoid each other by the action of the second clearance groove (55) and the third clearance groove (56).

9. An air pump according to claim 7, characterized in that, A movable screw (510) is hinged to one side of the bottom of the upper protective housing (51). The surface of the movable screw (510) is threaded with an anti-slip nut (511). The surface of the lower protective housing (52) is provided with a push-in groove (520) for the movable screw (510) to be flipped and inserted. A fixing groove (521) is also provided below the push-in groove (520). Rotating the anti-slip nut (511) causes it to abut against the top wall of the fixing groove (521) to position the movable screw (510).

10. An air pump according to claim 9, characterized in that, A plug (513) is fixed on the other side of the bottom of the upper protective housing (51), and a slot (522) is correspondingly opened on the surface of the lower protective housing (52).

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