Multi-spring-eye reverse bow type main and auxiliary plate spring

Abstract

The utility model discloses a multi-spring-lug reverse-bow type main and auxiliary plate spring, which relates to the technical field of plate springs, and comprises a main spring and a reverse-bow auxiliary spring, the main spring and the reverse-bow auxiliary spring are integrally bent into an arc line, the reverse-bow auxiliary spring is positioned on the inner side of the arc of the main spring, and the bending direction of the reverse-bow auxiliary spring is opposite to the bending direction of the main spring. Connecting pieces are arranged between the two ends of the reverse bow auxiliary spring and the main spring, and the reverse bow auxiliary spring and the main spring are relatively fixed through the connecting pieces. The plate spring is better in stability, can reduce large shaking of a vehicle in the driving process, has better bearing capacity, reduces friction between the plate spring and a vehicle frame, and reduces noise.

Description

Technical Field

[0001] The utility model relates to the technical field of leaf springs, in particular to a multi-wound reverse-bow type main and auxiliary leaf spring. Background Art

[0002] Leaf spring is an elastic element widely used in vehicle suspension. It is an elastic beam of approximately equal strength composed of several alloy spring leaves of equal width and different lengths. It bears and transmits the vertical force between the frame and the axle and various forces other than the vertical force and the torque formed by them, ensuring the smoothness of vehicle driving and the stability of handling. The longest spring leaf is called the main leaf, which has ears at both ends, and is used to be hinged with the frame support to play a role in force transmission and guidance.

[0003] The existing invention patent with publication number CN107939879A discloses an automobile leaf spring assembly, which is composed of spring leaves stacked up and down, the spring leaves are shortened from top to bottom, the spring leaves include a main spring leaf and a secondary spring leaf under the main spring leaf, the middle of the secondary spring leaf is in contact with the main spring leaf, and gaps are provided between the secondary spring leaf and the main spring leaf on both sides, the main spring leaf is provided with a double-layer upper rolled ear, the front end of the main spring leaf close to the ear is positioned and clamped with a spring clip, the main spring leaf and the secondary spring leaf are fixed with a limit block, and the limit block is provided in the middle of one side of the main spring leaf.

[0004] In view of the above-mentioned prior art, the inventor believes that the existing leaf spring structure requires the main spring to reach a certain level of load before the main spring and the auxiliary spring work together. Its supporting stability is poor, the load-bearing performance is low, and there is a certain difference in the frequency of the main and auxiliary leaf springs under different loads, which is easy to generate noise. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a multi-wound reverse-arch type main and auxiliary leaf springs, which have better stability, can reduce the large shaking of the vehicle during driving, have better bearing capacity, and reduce the friction between the leaf spring and the frame, thereby reducing noise.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a multi-ear reverse-bow main and auxiliary leaf spring, including a main spring and a reverse-bow auxiliary spring, the main spring and the reverse-bow auxiliary spring are bent into an arc as a whole, the reverse-bow auxiliary spring is located on the inner side of the arc of the main spring, the bending direction of the reverse-bow auxiliary spring is set opposite to the bending direction of the main spring, connecting parts are provided between the two ends of the reverse-bow auxiliary spring and the main spring, and the reverse-bow auxiliary spring is relatively fixed to the main spring through the connecting parts.

[0007] Furthermore, the main spring includes a main spring plate, a main spring auxiliary plate and a first fixing member. Both ends of the main spring plate are bent to form a first coil ear. The main spring auxiliary plate is provided with at least one and is attached to the outer arc surface of the main spring plate. The main spring auxiliary plate is fixedly connected to the main spring plate via the first fixing member.

[0008] Furthermore, the main spring also includes an inner spring leaf, which is attached to the inner arc surface of the main spring leaf, and both ends of the inner spring leaf are bent to form a second ear for connecting to the connecting piece.

[0009] Furthermore, the reverse bow auxiliary spring includes an auxiliary spring plate, an auxiliary spring auxiliary plate and a second fixing member, the two ends of the auxiliary spring plate are bent to form a third coil ear for connecting to the connecting member, the auxiliary spring auxiliary plate is provided with at least one, the auxiliary spring auxiliary plate is fitted on the outer arc surface of the auxiliary spring plate, and the auxiliary spring auxiliary plate is fixedly connected to the auxiliary spring plate through the second fixing member.

[0010] Further, the connecting member includes two mounting plates arranged opposite to each other and two winding cores arranged on the mounting plates, one of the winding cores is rotatably arranged in the second winding ear, and the other winding core is rotatably arranged in the third winding ear. The connecting member includes two mounting plates arranged opposite to each other and two winding cores arranged on the mounting plates, one of the winding cores is rotatably arranged in the second winding ear, and the other winding core is rotatably arranged in the third winding ear.

[0011] Furthermore, the winding core includes a connecting screw, a locking nut and two sleeves. The connecting screw is passed through the mounting plate, and one end of the connecting screw passing through the mounting plate is threadedly connected to the locking nut. The sleeve is rotatably sleeved outside the connecting screw. A retaining ring is fixed at one end of the two sleeves that are away from each other. The second winding ear and the third winding ear are located between the corresponding two retaining rings.

[0012] Beneficial effects of the utility model:

[0013] The utility model discloses a multi-ear inverse-bow type main and auxiliary leaf springs. By arranging an inverse-bow auxiliary spring with a bending direction opposite to that of the main spring on the inner arc side of the main spring, and connecting the two ends of the inverse-bow auxiliary spring to the main spring, the main and auxiliary leaf springs have better overall stability when bearing loads, and can reduce large shaking of the vehicle during driving. The inverse-bow auxiliary spring provides support for the main spring, which can effectively increase the bearing performance of the leaf spring and has better bearing capacity. Moreover, no matter in the unloaded or loaded condition, the main spring and the inverse-bow auxiliary spring work and support each other together, and the suspension frequency changes little under various loads, thereby reducing the friction between the leaf spring and the frame and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a partial structural diagram of the utility model for reflecting the connection mode between the main spring and the reverse-bow auxiliary spring.

[0016] Figure 3 It is a structural schematic diagram of the connecting piece in the utility model.

[0017] In the figure: 1. main spring; 11. main spring leaf; 111. first ear; 12. inner spring leaf; 121. second ear; 13. auxiliary leaf of main spring; 14. first fixing piece; 2. reverse bow auxiliary spring; 21. auxiliary spring leaf; 211. third ear; 22. auxiliary leaf of auxiliary spring; 23. second fixing piece; 3. connecting piece; 31. mounting plate; 32. winding core; 321. connecting screw; 322. locking nut; 323. sleeve; 324. retaining ring. DETAILED DESCRIPTION

[0018] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0019] The utility model discloses a multi-wound-ear reverse-bow type main and auxiliary leaf spring.

[0020] Reference Figure 1 A multi-wound reverse-bow type main and auxiliary leaf spring comprises a main spring 1 and a reverse-bow auxiliary spring 2. The main spring 1 and the reverse-bow auxiliary spring 2 are bent into an arc shape as a whole. The reverse-bow auxiliary spring 2 is located on the inner side of the arc of the main spring 1. The bending direction of the reverse-bow auxiliary spring 2 is set opposite to the bending direction of the main spring 1. Connectors 3 are provided between the two ends of the reverse-bow auxiliary spring 2 and the main spring 1. The reverse-bow auxiliary spring 2 is relatively fixed to the main spring 1 through the connector 3. By arranging the reverse-bow auxiliary spring 2 with the bending direction opposite to the main spring 1 on the inner arc side of the main spring 1, and connecting the two ends of the reverse-bow auxiliary spring 2 to the main spring 1, the main and auxiliary leaf springs have better overall stability when bearing loads, which can reduce large shaking of the vehicle during driving. The reverse-bow auxiliary spring 2 provides support for the main spring 1, which can effectively increase the bearing performance of the leaf spring and has better bearing capacity.

[0021] Reference Figure 1 and Figure 2 The main spring 1 includes a main spring leaf 11, an inner spring leaf 12, a main spring auxiliary leaf 13 and a first fixing member 14. The two ends of the main spring 1 are bent to form a first ear 111. The main spring auxiliary leaf 13 is provided with at least one. In this embodiment, three main spring auxiliary leaves 13 are provided. The three main spring auxiliary leaves 13 are sequentially fitted on the outer arc surface of the main spring leaf 11, and the lengths of the three main spring auxiliary leaves 13 are arranged in a decreasing manner in the direction away from the main spring leaf 11. The main spring auxiliary leaf 13 is fixedly connected to the main spring leaf 11 through the first fixing member 14; the inner spring leaf 12 is fitted on the inner arc surface of the main spring leaf 11, and the two ends of the inner spring leaf 12 are bent to form a second ear 121 for connecting with the connecting member 3. In this embodiment, the first fixing member 14 adopts a connecting bolt and a clamp. The connecting bolt is passed through the center of the main spring 1 and is locked by a nut. There are two clamps, which are sleeved and fixed on the outside of the main spring 1.

[0022] Reference Figure 1 and Figure 2, the anti-arch auxiliary spring 2 includes a auxiliary spring leaf 21, an auxiliary spring auxiliary leaf 22 and a second fixing member 23. Third coiled ears 211 for connecting with the connecting member 3 are formed by bending both ends of the auxiliary spring leaf 21. At least one auxiliary spring auxiliary leaf 22 is provided. In this embodiment, one auxiliary spring auxiliary leaf 22 is provided. The auxiliary spring auxiliary leaf 22 is attached to the outer arc surface of the auxiliary spring leaf 21, and the auxiliary spring auxiliary leaf 22 is fixedly connected to the auxiliary spring leaf 21 through the second fixing member 23. The second fixing member 23 also adopts the form of a connecting bolt and a clamp. The connecting bolt penetrates through one end of the anti-arch auxiliary spring 2, and the clamp is sleeved and fixed at the other end of the anti-arch auxiliary spring 2.

[0023] Referring to Figures 1 to 3 , the connecting member 3 includes two oppositely arranged mounting plates 31 and two spools 32 arranged on the mounting plates 31. One of the spools 32 is rotatably inserted into the second coiled ear 121, and the other spool 32 is rotatably inserted into the third coiled ear 211 through a rotating rod. The spool 32 includes a connecting screw 321, a locking nut 322 and two sleeves 323. The connecting screw 321 penetrates through the mounting plate 31, and one end of the connecting screw 321 passing through the mounting plate 31 is threadedly connected to the locking nut 322. The sleeves 323 are rotatably sleeved outside the connecting screw 321. Stop rings 324 are fixed at the ends of the two sleeves 323 away from each other. The second coiled ear 121 and the third coiled ear 211 are located between the corresponding two stop rings 324, and the stop rings 324 play a positioning and limiting role.

[0024] The main spring 1 is connected to one of the spools 32 of the connecting member 3 through the second coiled ear 121 of the inner spring leaf 12, and the anti-arch auxiliary spring 2 is connected to the other spool 32 of the connecting member 3 through the third coiled ear 211 of the auxiliary spring leaf 21, thereby realizing the connection between the main spring 1 and the anti-arch auxiliary spring 2. With this connection method, whether in the no-load or load condition, the main spring 1 and the anti-arch auxiliary spring 2 work together and support together. The suspension frequency changes little under various loads, reducing the friction between the leaf spring and the vehicle frame and reducing the noise.

[0025] Taking the above ideal embodiment based on the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-wound reverse-bow main and auxiliary leaf spring, characterized in that: The invention comprises a main spring (1) and a reverse bow auxiliary spring (2), wherein the main spring (1) and the reverse bow auxiliary spring (2) are bent into an arc as a whole, the reverse bow auxiliary spring (2) is located inside the arc of the main spring (1), the bending direction of the reverse bow auxiliary spring (2) is arranged opposite to the bending direction of the main spring (1), connecting members (3) are arranged between the two ends of the reverse bow auxiliary spring (2) and the main spring (1), and the reverse bow auxiliary spring (2) is relatively fixed to the main spring (1) via the connecting member (3).

2. The multi-wound reverse-bow type main and auxiliary leaf spring according to claim 1, characterized in that: The main spring (1) comprises a main spring leaf (11), a main spring auxiliary leaf (13) and a first fixing member (14); both ends of the main spring leaf (11) are bent to form a first coiling ear (111); the main spring auxiliary leaf (13) is provided with at least one and is attached to the outer arc surface of the main spring leaf (11); the main spring auxiliary leaf (13) is fixedly connected to the main spring leaf (11) via the first fixing member (14).

3. The multi-wound reverse-bow type main and auxiliary leaf spring according to claim 2, characterized in that: The main spring (1) further comprises an inner spring leaf (12), wherein the inner spring leaf (12) is fitted to the inner arc surface of the main spring leaf (11), and the two ends of the inner spring leaf (12) are bent to form a second coil ear (121) for connecting to the connecting member (3).

4. The multi-wound ear reverse bow type main and auxiliary leaf spring according to claim 3, characterized in that: The reverse bow auxiliary spring (2) comprises an auxiliary spring piece (21), an auxiliary spring piece (22) and a second fixing member (23); both ends of the auxiliary spring piece (21) are bent to form a third coil ear (211) for connecting to a connecting member (3); the auxiliary spring piece (22) is provided with at least one auxiliary spring piece (22); the auxiliary spring piece (22) is arranged in close contact with the outer arc surface of the auxiliary spring piece (21); and the auxiliary spring piece (22) is fixedly connected to the auxiliary spring piece (21) via the second fixing member (23).

5. The multi-wound reverse-bow type main and auxiliary leaf spring according to claim 4, characterized in that: The connecting member (3) comprises two mounting plates (31) arranged opposite to each other and two winding cores (32) arranged on the mounting plates (31), wherein one of the winding cores (32) is rotatably inserted into the second winding ear (121), and the other winding core (32) is rotatably inserted into the third winding ear (211).

6. The multi-wound reverse-bow type main and auxiliary leaf spring according to claim 5, characterized in that: The winding core (32) comprises a connecting screw (321), a locking nut (322) and two sleeves (323); the connecting screw (321) is passed through the mounting plate (31), and one end of the connecting screw (321) passing through the mounting plate (31) is threadedly connected to the locking nut (322); the sleeve (323) is rotatably sleeved outside the connecting screw (321); a retaining ring (324) is fixed to the ends of the two sleeves (323) that are away from each other; the second winding ear (121) and the third winding ear (211) are located between the two corresponding retaining rings (324).

Images