Truck transmission shaft with quick dynamic balance calibration structure

Abstract

The utility model discloses a truck transmission shaft with a quick dynamic balance calibration structure, which relates to the technical field of transmission shafts and particularly comprises a shaft body, universal joints are respectively arranged at two ends of the shaft body, at least one balancing weight support body is arranged along the surface of the shaft body, and the balancing weight support body is of an annular structure and is coaxially arranged with the shaft body. At least one balancing weight is detachably arranged on the balancing weight supporting body, the balancing weight and the balancing weight supporting body are tightly attached, and no gap exists in the contact position of the balancing weight and the balancing weight supporting body. When the balancing weight is used and the shaft body needs to be leveled and calibrated, the balancing weight can be moved to any position on the side surface of the balancing weight supporting body by unscrewing the locking bolt, and then the balancing weight is fastened by the locking bolt, so that the balancing weight is simple to operate and convenient to use. And after the locking bolt passes through, no gap exists between the balancing weight supporting body and the balancing weight, and the situation that large dirt adheres to the balancing weight in the long-term use process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of drive shafts, in particular to a truck drive shaft with a rapid dynamic balance calibration structure. Background Technique

[0002] The truck drive shaft is an important transmission component connecting the gearbox and the rear axle. Without the truck drive shaft, the vehicle cannot run. All truck drive shafts will undergo a balance test before leaving the factory, so that each truck drive shaft leaving the factory meets the balance standard.

[0003] However, after being installed in the truck, the drive shaft bears large torque and vibration for a long time, which may cause the truck drive shaft to have a deformed torque. When the truck drive shaft is deformed, it needs to be balanced. The traditional balancing method is to adjust the balance by welding counterweight blocks on the surface of the truck drive shaft. First of all, welding is likely to cause deformation of the drive shaft, thus introducing new unbalanced factors, and the quality of the solder used each time during the welding process cannot be accurately controlled, which is not conducive to more precisely offsetting the unbalanced mass; finally, if the balance block is welded in the wrong position, it cannot be effectively remedied.

[0004] For example, the heavy truck drive shaft with a rapid dynamic balance calibration structure proposed in the patent document number "CN103072477A" records in paragraph

[0014] of its specification that first, the balance block and the slider on the semi-circular ring are not fixed, and the circumferential position of the balance block 6 is adjusted on the annular groove 4 of the semi-circular ring 1 to balance the shaft; among them, there is a large gap between the balance block and the semi-circular ring;

[0005] Another example is the truck drive shaft with a rapid dynamic balance calibration structure proposed in the patent document number "CN217835361 U", which records in paragraph

[0023] of its specification that the balance adjustment block slides on the hollow annular guide rod. Since the first hollow annular connecting plate and the second hollow annular connecting plate are fixedly connected to the balance adjustment block through double-headed fastening bolts, and an installation hole is opened above the outer wall of the balance adjustment block, it is convenient to limit and fix the balance adjustment block. There is also a large gap between the balance adjustment block and the hollow annular guide rod;

[0006] And the large gap is likely to accumulate dirt. When dirt accumulates in the gap, it will further affect the balance of the drive shaft. Therefore, we propose a truck drive shaft with a rapid dynamic balance calibration structure. Content of the Utility Model

[0007] The utility model provides a truck drive shaft with a rapid dynamic balance calibration structure, which has the advantages that there is no gap between the counterweight support body and the counterweight, and the installation and disassembly are extremely convenient, and solves the problems raised in the above background technique.

[0008] To achieve the above object, the present utility model is realized through the following technical solutions: A truck drive shaft with a rapid dynamic balance calibration structure includes a shaft body. Universal joints are respectively provided at both ends of the shaft body. Along the surface of the shaft body, at least one counterweight support is provided. The counterweight support is of a ring structure and is coaxially arranged with the shaft body; at least one counterweight is detachably provided on the counterweight support, and the counterweight and the counterweight support are in close contact with each other and there is no gap at the contact position between the two.

[0009] Preferably, connecting flanges are respectively provided at the free ends of the universal joints.

[0010] Preferably, a telescopic shaft is coaxially provided on the shaft body.

[0011] Preferably, the counterweight is detachably connected to the counterweight support through a frame body.

[0012] Preferably, the frame body includes clamping plates provided on both sides of the counterweight. One ends of the clamping plates close to the shaft body respectively extend to the side surfaces of the counterweight support; wherein, the counterweight is placed on the side surface of the counterweight support away from the shaft body, and the counterweight and the clamping plates are connected through fasteners, so that the two clamping plates clamp the counterweight support.

[0013] Preferably, at least one annular clamping groove is respectively provided on both sides of the counterweight support; on one side of the clamping plate close to the side surface of the counterweight support, an arc-shaped clamping block corresponding to the annular clamping groove is provided, and the arc-shaped clamping block is placed in the annular clamping groove.

[0014] Preferably, the side of the counterweight close to the shaft body is of an arc-shaped structure matching the surface of the counterweight support.

[0015] Preferably, the fastener includes a locking bolt. A locking hole is provided on the side of the counterweight support away from the shaft body, and the locking hole penetrates through the counterweight. The locking bolt is placed in the locking hole and a nut is provided at the free end thereof.

[0016] Compared with the prior art, when in use of the present utility model, when it is necessary to level and calibrate the shaft body, the locking bolt is loosened, and then the counterweight can be moved to any position on the side surface of the counterweight support, and then it can be fastened through the locking bolt. The operation is simple and the use is convenient. Moreover, after passing through the locking bolt, there will be no gap between the counterweight support and the counterweight, and no large amount of dirt will adhere to the counterweight during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present utility model.

[0018] Figure 2 It is a specific structural schematic diagram of the counterweight support of the present utility model Figure 1 .

[0019] Figure 3 Specific structural schematic diagram of the counterweight support body of the present utility model Figure 2 。

[0020] In the figure: 1, shaft body; 2, counterweight; 3, counterweight support body; 4, telescopic shaft; 5, universal joint; 6, arc-shaped clamping block; 7, clamping plate; 8, locking hole; 9, annular clamping groove; 10, locking bolt. Specific implementation manner

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 3 , the present utility model provides a technical solution: a truck drive shaft with a fast dynamic balance calibration structure, including a shaft body 1. The shaft body 1 is a hollow structure. Universal joints 5 are respectively provided at both ends of the shaft body 1. Connecting flanges are respectively provided at the free ends of the universal joints 5. During use, they are connected to the vehicle's gearbox and rear axle through the connecting flanges;

[0023] A telescopic shaft 4 is coaxially provided on the shaft body 1. A telescopic shaft 4 is provided on the drive shaft. In reality, the telescopic shaft 4 is composed of a spline and a spline sleeve, which enables the drive shaft to achieve slight telescoping during rotation and release the stress on the shaft.

[0024] In this application, in order to facilitate the installation of the counterweight on the shaft body 1 and also facilitate adjustment and disassembly, as Figure 1 shown, at least one counterweight support body 3 is provided along the surface of the shaft body 1. The counterweight support body 3 can be provided at both ends or in the middle of the shaft body 1 because during use, the eccentric positions of the drive shaft mostly occur in the middle and both ends;

[0025] It should be noted that the counterweight support body 3 is a ring structure and is coaxially arranged with the shaft body 1, so that the counterweight support body 3 can be evenly distributed on the surface of the shaft body 1 and no vibration will occur when the shaft body rotates. Moreover, when the shaft body 1 is processed, it rotates on a rotary machine tool and the turning tool cuts the surface of the shaft. Designing the counterweight support body 3 as a ring structure also facilitates turning by the turning tool and is convenient for processing;

[0026] Moreover, at least one counterweight 2 is detachably provided on the counterweight support body 3. The counterweight 2 is specifically detachably connected to the counterweight support body 3 through a frame. The specific structure of the frame is as Figure 2 and Figure 3As shown in the figure, the frame body includes clamping plates 7 disposed on both sides of the counterweight 2, and one ends of the clamping plates 7 close to the shaft body 1 respectively extend to the side surfaces of the counterweight support body 3;

[0027] As Figure 2 shown, a locking hole 8 is provided on the side of the counterweight support body 3 away from the shaft body 1, and the locking hole 8 penetrates through the counterweight 2. During installation, the counterweight 2 is placed on the side surface of the counterweight support body 3 away from the shaft body 1. In order to make the counterweight fit more closely with the counterweight support body 3, one side of the counterweight 2 close to the shaft body 1 is designed into an arc structure matching the surface of the counterweight support body 3. When the counterweight 2 is placed on the top of the counterweight support body 3, there is no gap at the contact position between the two.

[0028] Moreover, the counterweight 2 and the clamping plates 7 are connected by fasteners. The fasteners are specifically locking bolts 10. The locking bolts 10 are placed in the locking holes 8 and nuts are provided on their free ends. When the nuts are tightened, not only can the counterweight 2 be clamped, but also the two clamping plates 7 clamp the counterweight support body 3, and the counterweight 2 is closely attached to the surface of the counterweight support body 3;

[0029] Therefore, the counterweight 2 can be installed on the counterweight support body 3 through the two clamping plates 7, which is convenient for installation. When the shaft body 1 needs to be leveled and calibrated, the locking bolts 10 are loosened, and the counterweight 2 can be moved to any position on the side surface of the counterweight support body 3, and then it can be fastened by the locking bolts. This leveling method is simple. After passing through the locking bolts 10, there will not be a large gap between the counterweight support body 3 and the counterweight 2. Moreover, in the actual application process, the number of counterweights 2 can be multiple, and multiple counterweights 2 can be moved together for leveling.

[0030] Furthermore, in order to make the connection between the clamping plates 7 and the counterweight support body 3 more stable, as Figure 2 and Figure 3 shown, at least one annular slot 9 is respectively provided on both sides of the counterweight support body 3, and arc-shaped blocks 6 corresponding to the annular slots 9 are provided on the side of the clamping plates 7 close to the side surface of the counterweight support body 3, and the arc-shaped blocks 6 are placed in the annular slots 9;

[0031] When the shaft body 1 needs to rotate quickly during use, the counterweight 2 has to bear a large centrifugal force. Although it can be firmly fixed on the counterweight support body 3 through the clamping plates 7, the connection strength can be further improved by the matching method of placing the arc-shaped blocks 6 in the annular slots 9, so that the counterweight always remains stable.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A truck drive shaft with a fast dynamic balance calibration structure, comprising a shaft body (1), and universal joints (5) are respectively arranged at both ends of the shaft body (1), characterized in that, At least one counterweight support (3) is provided along the surface of the shaft body (1), and the counterweight support (3) is of an annular structure and is coaxially arranged with the shaft body (1); At least one counterweight (2) is detachably provided on the counterweight support (3), and there is no gap at the position where the counterweight (2) and the counterweight support (3) are in close contact with each other.

2. The truck drive shaft with a fast dynamic balance calibration structure according to claim 1, wherein, Connecting flanges are respectively provided at the free ends of the universal joints (5).

3. The truck drive shaft with a quick dynamic balance calibration structure according to claim 1, characterized in that A telescopic shaft (4) is coaxially provided on the shaft body (1).

4. The truck drive shaft with a fast dynamic balance calibration structure according to claim 1, characterized in that, The counterweight (2) is detachably connected to the counterweight support (3) through a frame body.

5. The truck drive shaft with a fast dynamic balance calibration structure according to claim 4, characterized in that, The frame body includes clamping plates (7) arranged on both sides of the counterweight (2), and the ends of the clamping plates (7) close to the shaft body (1) respectively extend to the side surfaces of the counterweight support (3); Among them, the counterweight (2) is placed on the side surface of the counterweight support (3) away from the shaft body (1), and the counterweight (2) and the clamping plates (7) are connected through fasteners, so that the two clamping plates (7) clamp the counterweight support (3).

6. The truck drive shaft with a fast dynamic balance calibration structure according to claim 5, characterized in that, At least one annular groove (9) is provided on each side of the counterweight support (3); An arc-shaped block (6) corresponding to the annular groove (9) is provided on the side of the clamping plate (7) close to the side surface of the counterweight support (3), and the arc-shaped block (6) is placed in the annular groove (9).

7. The truck drive shaft with a quick dynamic balance calibration structure according to claim 6, characterized in that, The side of the counterweight (2) close to the shaft body (1) is of an arc-shaped structure matching the surface of the counterweight support (3).

8. The truck drive shaft with a quick dynamic balance calibration structure according to claim 7, characterized in that, The fastener includes a locking bolt (10), a locking hole (8) is provided on the side of the counterweight support (3) away from the shaft body (1), the locking hole (8) penetrates through the counterweight (2), and the locking bolt (10) is placed in the locking hole (8) and a nut is provided at its free end.

Images