Rubber-tired road roller wheel edge drive wheel set

Abstract

The utility model discloses a kind of wheel edge drive wheel groups for rubber-tired road roller, belong to engineering machinery field.The wheel group includes walking motor, speed reducer, transmission shaft, tire seat and rim assembly.First rim is fixed to tire seat, tire seat is rigidly connected with transmission shaft, transmission shaft is supported by bearing and is connected to rim seat, rim seat is connected with second rim and transition disc respectively, transition disc is connected with the flange of speed reducer output end, walking motor is fixed to speed reducer casing, speed reducer casing is directly rigidly connected with rack.The whole machine of road roller adopts at least two above-mentioned wheel groups, and parallel closed hydraulic circuit is constituted by walking pump and each walking motor.The utility model replaces traditional chain with rigid transmission chain, and transmission efficiency is high, maintenance cost is low;Modular integrated design saves space, reduces weight;Hydraulic circuit automatically realizes differential, avoids tire slip, and improves compaction quality.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, and more specifically relates to a wheel-side drive wheel set for a rubber-tired road roller. Background Technology

[0002] A rubber-tired roller is a machine that uses inflatable tires to statically compact road surfaces. In existing technology, rubber-tired rollers are mostly driven by a central drive axle coupled with chain transmission. For example, existing technology such as CN201922856U discloses a hydraulic transmission tire roller drive unit that uses a motor and reducer to drive one rim, and then transmits power to the other rim via a half-shaft. This structure still requires a relatively long drive shaft system and does not solve the problem of independent drive and differential speed for multiple wheel sets.

[0003] Traditional bridge-type chain drive structures have the following main drawbacks: 1. The drive chain requires regular tension adjustment, is prone to wear and breakage, resulting in high maintenance costs and safety hazards; 2. The structure is complex, with components such as the drive axle and drive shaft occupying a large amount of internal space, leading to high overall material costs; 3. It is difficult to achieve automatic differential speed between the left and right wheel sets, which can easily cause tire slippage when the roller turns, rubbing the already compacted asphalt pavement and affecting the final construction quality. Utility Model Content

[0004] To solve the above problems and overcome the shortcomings of the existing technology, this utility model provides a wheel-side drive wheel assembly for a rubber-tired roller; The first technical problem to be solved is: to address the issues of complex transmission structure, high maintenance costs, low transmission efficiency, and tire slippage caused by the inability to achieve automatic differential in existing rubber-tired rollers.

[0005] The specific technical solution of this utility model to solve the above-mentioned technical problems is as follows: a wheel-side drive wheel set for a rubber-tired road roller, including a wheel-side drive assembly; The wheel-side drive assembly includes a travel motor, a reducer, a drive shaft, a tire seat, and a wheel rim assembly; the wheel rim assembly includes a first wheel rim and a second wheel rim. The first wheel rim is fixedly connected to the tire seat by bolts; the tire seat and the drive shaft are rigidly connected by splines or interference fit; the drive shaft is supported in a bearing housing by a pair of rolling bearings; the end of the drive shaft away from the tire seat is rigidly connected to the wheel rim seat by splines or interference fit. The rim seat is fixedly connected to the second rim by bolts; the rim seat is also fixedly connected to the transition plate by bolts; the transition plate is connected to the output flange of the reducer by bolts; the travel motor is fixedly mounted on the housing of the reducer by bolts. The reducer housing is provided with a fixing part, which is rigidly connected to the roller frame by bolts.

[0006] Furthermore, the output shaft of the walking motor is inserted into the input end of the reducer.

[0007] Furthermore, the walking motor is equipped with a hydraulic oil port.

[0008] A rubber-tired roller includes a frame and at least two wheel-side drive wheel sets as described in any one of the claims, respectively installed on the left and right sides of the frame; it also includes a travel pump driven by an engine; the travel pump is connected to the hydraulic oil port of each of the travel motors through hydraulic pipelines to form a parallel closed hydraulic circuit.

[0009] The beneficial effects of this utility model are: One advantage of this invention is that it integrates a travel motor and a reduction gear into a drive assembly on each wheel-side drive wheel set, and is rigidly connected to the tire through a transition plate, rim seat, drive shaft, etc. This structure realizes the conversion of hydraulic power into mechanical torque on-site at the wheel-side and directly drives the tire to rotate. It eliminates a series of intermediate transmission components such as the traditional central drive axle, drive shaft, and chain, thereby eliminating the risk of chain wear, elongation, and breakage. This not only improves transmission efficiency but also significantly reduces failure rate and maintenance costs.

[0010] One advantage of this invention is that the travel motor is directly fixed to the reducer housing with bolts, and the reducer housing is directly and rigidly connected to the roller frame through its fixing part. The travel motor, reducer and load-bearing structure are integrated into a modular wheel-side drive assembly. This frees up effective space inside the machine body, making it possible to arrange other systems or reduce the overall size of the machine. It also simplifies the structure and reduces the material cost and weight of the whole machine. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the wheel-side drive wheel assembly structure of this utility model; in the attached drawing: 1. Travel motor; 2. Reducer; 3. Drive shaft; 4. Tire seat; 5. First rim; 6. Second rim; 7. Bearing seat; 8. Rim seat; 9. Transition plate. Detailed Implementation

[0012] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "rear," "lower left," "upper right," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] The specific embodiment of this utility model is as follows: A wheel-side drive wheel set for a rubber-tired road roller includes a wheel-side drive assembly; the wheel-side drive assembly includes a travel motor 1, a reducer 2, a transmission shaft 3, a tire seat 4, and a wheel rim assembly, the wheel rim assembly including a first wheel rim 5 and a second wheel rim 6; The first rim 5 is bolted to the tire seat 4. The tire seat 4 is rigidly connected to the drive shaft 3 via a spline or interference fit. The drive shaft 3 is supported in a bearing housing 7 by a pair of rolling bearings, allowing it to rotate freely. The other end of the drive shaft 3 is also rigidly connected to the rim seat 8 via a spline or interference fit. The rim seat 8 is bolted to the second rim 6, and is also bolted to the transition plate 9. The transition plate 9 is bolted to the output flange of the reducer 2.

[0014] With this structure, each wheel-side drive wheel assembly integrates a travel motor 1 and a reducer 2 to form a drive assembly, which is rigidly connected to the tire through a transition plate 9, a rim seat 8, and a drive shaft 3. This realizes the conversion of hydraulic power into mechanical torque on-site at the wheel side, and directly drives the tire to rotate. It eliminates a series of intermediate transmission components such as the traditional central drive axle, drive shaft 3, and chain, thereby eliminating the risk of chain wear, elongation, and breakage. This not only improves transmission efficiency but also significantly reduces the failure rate and maintenance costs.

[0015] The travel motor 1 is bolted to the housing of the reducer 2. The output shaft of the travel motor 1 is inserted into the input end of the reducer 2 to provide power. The housing of the reducer 2 has a fixing part with mounting holes, which is rigidly connected to the frame of the road roller by high-strength bolts. The travel motor 1 has two hydraulic ports for connecting high-pressure and low-pressure oil pipes from the hydraulic system.

[0016] When this wheel-side drive wheel set is used in a rubber-tired roller, at least one wheel is installed on each of the left and right sides of the frame. The machine also includes an engine-driven travel pump. This travel pump is connected to the hydraulic ports of the travel motors 1 on the left and right wheel-side drive wheel sets via hydraulic hoses, forming a parallel closed hydraulic circuit. This circuit allows the hydraulic oil to automatically distribute its flow according to the different load pressures on the left and right motors. When the roller turns, the resistance of the outer wheel decreases, and the hydraulic oil automatically flows preferentially to the travel motor 1 driving the outer wheel, increasing its speed; the inner wheel does the opposite, slowing down its speed. This automatic differential process based on physical characteristics achieves slip-free steering of the left and right wheel sets, completely avoiding the rubbing and damage to flexible compacted materials such as asphalt caused by tire slippage, and directly improving the final quality of the compacted road surface.

[0017] It should be noted that this utility model is a wheel-side drive wheel assembly for a rubber-tired road roller. In specific operation... High-pressure hydraulic oil from the travel pump is delivered to the hydraulic port of the travel motor 1 via a hydraulic hose. The high-pressure oil enters the travel motor 1, pushing internal mechanical structures such as plungers, gears, or blades, causing the output shaft of the travel motor 1 to rotate. This process converts hydraulic energy into mechanical energy. The output shaft of the travel motor 1 directly drives the input end of the reducer 2. The reducer 2 reduces the output speed and increases the output torque. The increased torque is transmitted from the output end of the reducer 2, passing sequentially through the transition plate 9, rim seat 8, drive shaft 3, and tire seat 4, ultimately driving the first rim 5, the second rim 6, and the tire to rotate. Throughout the power transmission process, the housing of the reducer 2 is rigidly connected to the roller frame via a fixed part, bearing the generated reaction torque. Simultaneously, the drive shaft 3 is supported by the bearing seat 7 to ensure stable rotation. During turning, the parallel closed-loop hydraulic circuit automatically achieves differential speed to prevent tire slippage.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wheel-side drive wheel assembly for a rubber-tired roller, characterized in that, Including wheel-side drive assemblies; The wheel-side drive assembly includes a travel motor (1), a reducer (2), a drive shaft (3), a tire seat (4), and a wheel rim assembly; the wheel rim assembly includes a first wheel rim (5) and a second wheel rim (6). The first wheel rim (5) is fixedly connected to the tire seat (4) by bolts; the tire seat (4) and the drive shaft (3) are rigidly connected by spline or interference fit; the drive shaft (3) is supported in the bearing seat (7) by a pair of rolling bearings; the end of the drive shaft (3) away from the tire seat (4) is rigidly connected to the wheel rim seat (8) by spline or interference fit; The rim seat (8) is fixedly connected to the second rim (6) by bolts; the rim seat (8) is also fixedly connected to the transition plate (9) by bolts; the transition plate (9) is connected to the output flange of the reducer (2) by bolts; the travel motor (1) is fixedly installed on the housing of the reducer (2) by bolts; The reducer (2) has a fixing part on its housing, which is rigidly connected to the frame of the road roller by bolts.

2. The wheel-side drive wheel assembly for a rubber-tired roller according to claim 1, characterized in that, The output shaft of the walking motor (1) is inserted into the input end of the reducer (2).

3. The wheel-side drive wheel assembly for a rubber-tired roller according to claim 2, characterized in that, The walking motor (1) is equipped with a hydraulic oil port.

4. A rubber-tired roller, comprising a frame and a wheel-side drive wheel assembly as described in any one of claims 1-3, characterized in that, The number of wheel-side drive wheel sets is at least two, which are respectively installed on the left and right sides of the frame; it also includes a travel pump driven by an engine; the travel pump is connected to the hydraulic oil port of each travel motor (1) through a hydraulic pipeline to form a parallel closed hydraulic circuit.

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