CN217917470U

CN217917470U - Adjustable roller mechanism

Info

Publication number: CN217917470U
Application number: CN202222398707.5U
Authority: CN
Inventors: 张涛; 亢晨钢; 白建军; 庄维林
Original assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Current assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2022-11-29
Anticipated expiration: 2032-09-09

Abstract

The utility model discloses an adjustable roller mechanism, including eccentric shaft, bearing, gyro wheel and installing support, the gyro wheel sets up in the installing support with the bearing, the eccentric shaft includes the first shaft section and the second shaft section of disalignment, the first shaft section passes one side of installing support and is fixed through the fixed plate, the gyro wheel is assembled on the second shaft section with the bearing, the diameter of axle of first shaft section is greater than the diameter of axle of second shaft section, and the cross section of second shaft section is covered completely by the cross section of first shaft section. When the eccentric shaft rotates around the axis of the first shaft section, the axis position of the second shaft section rotates along with the eccentric shaft, so that the height of the roller assembled on the second shaft section is influenced, and the purpose of adjusting the height of the roller is achieved. The utility model discloses can be again from axial installation when realizing gyro wheel altitude mixture control, make full use of side direction space reaches the convenient purpose of maintenance, and key bearing structure atress is reasonable, and the part cooperation is accurate, sound construction, and whole mechanism reliability is high.

Description

Adjustable roller mechanism

Technical Field

The utility model relates to an adjustable gyro wheel mechanism belongs to engineering machine tool accessory technical field.

Background

The telescopic support leg is a structural member for supporting the whole concrete pump truck when the concrete pump truck works, and linearly extends and retracts to reciprocate when the concrete pump truck is converted from a running state to a working state. The telescopic supporting leg has the advantages of compact structure and strong site adaptability, and becomes the most popular supporting leg structure form in the current concrete pump truck industry. Various manufacturers usually design various mechanisms on the telescopic supporting legs to ensure the smoothness of the telescopic supporting legs, improve the use experience of customers and the performance of equipment, wherein the arrangement of the roller is the most extensive form. The telescopic leg operation mode of the concrete pump truck comprises a truck frame base, a telescopic leg and a roller mechanism. Roller mechanism installs in flexible landing leg top, and the general protrusion of back is flexible landing leg take the altitude after the gyro wheel installation is accomplished, and when flexible landing leg was flexible action in frame base, the gyro wheel can be earlier in flexible landing leg and frame base contact, and then with the sliding friction conversion rolling friction between flexible landing leg and frame base, reduced drag promotes flexible landing leg operation ride comfort.

In order to counteract manufacturing errors occurring during the production of the individual components, the roller height mostly needs to be designed in an adjustable manner. The roller mechanism usually includes bearings, bushings and the like, and needs to be periodically filled with lubricating oil for maintenance or to replace and repair worn parts.

In the prior art, the technical scheme of the adjustable roller mechanism used on the telescopic supporting leg mainly comprises 2 types. The first scheme is as shown in fig. 1 and fig. 2, and comprises a roller, a bearing, a concentric shaft and a mounting bracket, wherein the mounting bracket is generally fixed on a telescopic supporting leg in a welding mode, the axis of the cylindrical surface of the concentric shaft is parallel and staggered with the symmetric center of a regular polygonal cylinder at two ends of the concentric shaft to form eccentricity, and when different planes of the polygonal cylinder are clamped on the mounting bracket, the adjustment of the height of the axis of the roller is realized, so that the purpose of adjusting the height of the roller is achieved. The defect that this scheme exists does, the cylinder section cross-section of concentric shaft is greater than the polygon cross-section, the installing support needs to match with the polygon size, the unable edgewise dismouting of concentric shaft, consequently, can only go on from installing support opening top during the dismouting gyro wheel, to the flexible landing leg of mobile concrete pump, gyro wheel direction of height space is narrow and small, often only a few millimeters clearance, if need adjust the gyro wheel height or change trouble part, can only pull down flexible landing leg together with gyro wheel mechanism completely, and flexible landing leg is as great structure, and is bulky, the quality is big and attach hydraulic electric appliance component, the dismouting is wasted time and energy, this scheme altitude mixture control degree of difficulty is big, the maintainability is relatively poor.

The second scheme is shown in fig. 3 and 4 and mainly comprises a roller, a bearing, a concentric shaft, a mounting bracket, a limiting block, a roller seat, a clamping plate and a jackscrew. The installing support generally adopts welded mode to fix on flexible landing leg, and the mounting support is inserted to the cardboard, and the mounting bracket is put into to gyro wheel, bearing and axle pre-installation after the gyro wheel seat in, arranges the cardboard in on, and the jackscrew passes the screw hole top on the cardboard at gyro wheel seat bottom plate, and the stopper can prevent the drunkenness of cardboard and jackscrew, twists the degree of depth through adjusting the jackscrew and can realize the regulation to gyro wheel seat height, and then adjusts the gyro wheel height. The defect that this scheme exists is because the mechanism is more complicated, and key part is many, and needs clearance fit each other more, especially the main strong point of gyro wheel seat only has terminal screw terminal surface one department, and area of contact is minimum, and whole gyro wheel mechanism stability is relatively poor. After the telescopic support legs extend out, the roller mechanism bears huge pressure, the roller mechanism of the multi-stage telescopic support legs even bears several tons of pressure, and the instability of the roller mechanism can influence the product performance.

Disclosure of Invention

An object of the utility model is to overcome not enough among the prior art, provide an adjustable gyro wheel mechanism, can be again from axial installation when realizing gyro wheel altitude mixture control, make full use of side direction space reaches the convenient purpose of make things convenient for dismouting, maintenance, and key bearing structure atress is reasonable, and the part cooperation is accurate, sound construction, and whole mechanism reliability is high.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

the roller and the bearing are arranged in the mounting bracket, the eccentric shaft comprises a first shaft section and a second shaft section which are not coaxial, the first shaft section penetrates through one side of the mounting bracket and is fixed through a fixing plate, the roller and the bearing are assembled on the second shaft section, the shaft diameter of the first shaft section is larger than that of the second shaft section, and the cross section of the second shaft section is completely covered by the cross section of the first shaft section. When the eccentric shaft rotates around the axis of the first shaft section, the axis of the second shaft section rotates along with the eccentric shaft, so that the height of the roller assembled on the second shaft section is influenced, and the purpose of adjusting the height of the roller is achieved.

Furthermore, the fixing plate is sleeved at the end of the first shaft section, a unthreaded hole is formed in the fixing plate, a plurality of fixing holes are formed in one side, where the first shaft section is fixed, of the mounting bracket, and the unthreaded hole is connected with the fixing holes through fixing bolts.

Furthermore, the fixing holes are arranged around the first shaft section and distributed on an arc line within 180 degrees of the same virtual circumference. When the second shaft section axis rotates around the first shaft section axis, the height direction position relation accords with a complete sine/cosine curve graph, the range between adjacent wave crests and wave troughs is 180 degrees, namely the required angle for rotating the second shaft section axis from the lowest point to the highest point is 180 degrees, the rotation exceeding 180 degrees is necessary, the heights of partial areas are the same, and the repeated adjustment of the heights is caused. Therefore, the fixing holes are distributed in a range of 180 degrees, the axis of the second shaft section can be rotated from the lowest point to the highest point, and the eccentric shaft is rotated to connect the unthreaded hole with different fixing holes, so that the roller can be adjusted from the lowest point to the highest point. The 180 degree range of the virtual circumference can be adjusted according to the application environment and the installation space.

Furthermore, the fixed plate is connected with the first shaft section in a welding mode, and machining economy is improved.

Furthermore, the fixed plate is also provided with a threaded jacking hole for drawing out the eccentric shaft in the dismounting process.

Furthermore, a clamping groove is formed in the end portion of the first shaft section of the eccentric shaft, and the eccentric shaft can be conveniently rotated.

Furthermore, thrust washers are arranged at two ends of the roller, and the abrasion resistance of the roller mechanism is improved.

Furtherly, set up the oil duct on the second shaft section of eccentric shaft, the tip of first shaft section is equipped with the oiling mouth, and the oiling mouth communicates to the oil duct, makes things convenient for the bearing lubrication, hoist mechanism durability.

Further, for the telescopic supporting leg with the roller under smaller stress, the second shaft section of the eccentric shaft is of a cantilever structure, and under the condition, the length of the first shaft section can be properly lengthened to improve the overall stress condition of the mechanism.

Furthermore, for the telescopic supporting leg with the roller bearing a large force, the eccentric shaft can adopt a three-section design, the other end of the second shaft section of the eccentric shaft is provided with a third shaft section, the third shaft section is coaxial with the first shaft section, the shaft diameter of the second shaft section is larger than that of the third shaft section, the cross section of the third shaft section is completely covered by the cross section of the second shaft section, and the third shaft section penetrates through the other side of the mounting bracket. The pressure of the roller is transmitted to the telescopic supporting leg structure by the eccentric shaft, the stress of the fixing bolt is reasonable, the reliability of the mechanism is high, and the mechanism can bear larger load.

Furthermore, the cross section of the second shaft section is circular, the cross sections of the first shaft section and the third shaft section are circular or regular polygons with the same number of sides, and connecting holes matched with the first shaft section and the third shaft section are formed in two sides of the mounting support.

Compared with the prior art, the utility model discloses the beneficial effect who reaches:

the utility model discloses an eccentric shaft and optimization shaft diameter size and position relation can be followed the axial installation again when realizing gyro wheel altitude mixture control, eccentric shaft edgewise dismouting, and the gyro wheel need not to take flexible landing leg out during the maintenance renewal part from the dismouting of below, can accomplish the operation in less space, and mechanism maintenance is very succinct. The lateral space is fully utilized, and the purpose of convenient maintenance is achieved.

The utility model discloses gyro wheel altitude mixture control is simple, when adjusting the gyro wheel height, only needs the once fixing bolt of dismouting, requires lowly to operating tool.

The utility model discloses rational design mounting means, key bearing structure guarantee the size by the machining, and the part cooperation is accurate, sound construction, and whole mechanism reliability is high.

Drawings

FIG. 1 is a schematic view of an assembly structure of a first prior art solution;

FIG. 2 is an exploded view of a part of a first prior art arrangement;

FIG. 3 is a schematic view of an assembly structure of a second prior art solution;

FIG. 4 is an exploded view of a part of a second prior art arrangement;

fig. 5 is a schematic structural diagram of an adjustable roller mechanism provided in embodiment 1 of the present invention;

FIG. 6 is an exploded view of the adjustable roller mechanism of embodiment 1;

FIG. 7 is a schematic side view showing the construction of an eccentric shaft according to embodiment 1;

FIG. 8 is a schematic structural view of an eccentric shaft and a fixed plate according to embodiment 1;

FIG. 9 is a schematic structural view of a mounting bracket according to embodiment 1;

FIG. 10 is an exploded view of the components of an adjustable roller mechanism provided in accordance with example 2;

FIG. 11 is a schematic side view of an eccentric shaft according to embodiment 2;

FIG. 12 is a schematic view showing the construction of the eccentric shaft and the fixed plate according to embodiment 2;

fig. 13 is a schematic structural view of a mounting bracket according to embodiment 2.

In the figure: 1-eccentric shaft, 11-first shaft section, 12-second shaft section, 13-third shaft section, 14-oil channel, 15-oil injection port and 16-clamping groove; 2-a bearing; 3, rolling wheels; 4-thrust washers; 5-fixing the bolt; 6-fixing plate, 61-unthreaded hole and 62-threaded jacking hole; 7-mounting bracket, 71-connecting hole, 72-fixing hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Example 1

An adjustable roller mechanism as shown in fig. 5 to 9 comprises an eccentric shaft 1, a bearing 2, a roller 3 and a mounting bracket 7, wherein the roller 3 and the bearing 2 are arranged in the mounting bracket 7, the eccentric shaft 1 comprises a middle second shaft section 12 and a first shaft section 11 and a third shaft section 13 which are arranged at two ends, the first shaft section 11 passes through one side of the mounting bracket 7 and is fixed through a fixing plate 6, the third shaft section 13 passes through the other side of the mounting bracket 7, the roller 3 and the bearing 2 are assembled on the second shaft section 12, two ends of the roller 3 are provided with thrust washers 4, the shaft diameter of the first shaft section 11 is larger than that of the second shaft section 12, the shaft diameter of the second shaft section 12 is larger than that of the third shaft section 13, the cross section of the second shaft section 12 is completely covered by the cross section of the first shaft section 11, and the cross section of the third shaft section 13 is completely covered by the cross section of the second shaft section 12. The first shaft section 11 and the third shaft section 13 are coaxial, the axis of the second shaft section 12 deviates from the axes of the first shaft section 11 and the third shaft section 13, and when the eccentric shaft 1 rotates around the axes of the first shaft section 11 and the third shaft section 13, the axis position of the second shaft section 12 rotates along with the first shaft section, so that the height of the roller 3 assembled on the second shaft section 12 is influenced, and the purpose of adjusting the height of the roller 3 is achieved.

As shown in fig. 8 and 9, the fixing plate 6 is sleeved on the end of the first shaft segment 11 and welded, the fixing plate 6 is provided with a light hole 61, one side of the mounting bracket 7 fixing the first shaft segment 11 is provided with a plurality of fixing holes 72, and the light hole 61 is connected with the fixing holes 72 through fixing bolts 5. The fixing holes 72 are arranged on an arc line within 180 degrees of the same virtual circumference below the first shaft section 11. The eccentric shaft 1 rotates to enable the unthreaded hole 61 to be connected with different fixing holes 72, and then the roller 3 can be adjusted from the lowest point to the highest point. The fixed plate 6 is also provided with a threaded jacking hole 62 for drawing out the eccentric shaft 1 through a jackscrew and the like in the disassembly process.

As shown in fig. 7 and 8, an oil passage 14 is provided on the second shaft section 12 of the eccentric shaft 1, and an oil filling port 15 is provided at an end of the first shaft section 11, and the oil filling port 15 is communicated to the oil passage 14, so that lubrication of the bearing 2 is facilitated, and the durability of the lifting mechanism is improved. The end of the first shaft section 11 is provided with a clamping groove 16, so that the eccentric shaft 1 can be conveniently rotated.

In this embodiment, the first shaft section 11, the second shaft section 12 and the third shaft section 13 of the eccentric shaft 1 have circular cross sections, and the two sides of the mounting bracket 7 are respectively provided with a connecting hole 71 matching with the shaft diameters of the first shaft section 11 and the third shaft section 13.

This embodiment adjustable roller mechanism is when the assembly, with bearing 2 and gyro wheel 3 from the uncovered department of installing support 7 below push in, gyro wheel 3 both ends set up the thrust gasket, then insert the eccentric shaft 1 that will weld fixed plate 6 from installing support 7 from the big one side in aperture of connecting hole 71, make first shaft segment 11 and the big connecting hole 71 cooperation in aperture, second shaft segment 12 runs through gyro wheel 3, bearing 2 and thrust gasket 4 subassembly, third shaft segment 13 and the little connecting hole 71 cooperation in aperture, then installation fixing bolt 5, spare such as lubricated joint, accomplish the installation.

Example 2

An adjustable roller mechanism as shown in fig. 10 to 13 comprises an eccentric shaft 1, a bearing 2, a roller 3 and a mounting bracket 7, wherein the roller 3 and the bearing 2 are arranged in the mounting bracket 7, the eccentric shaft 1 comprises a first shaft section 11 and a second shaft section 12 which are different from each other, the first shaft section 11 passes through one side of the mounting bracket 7 and is fixed through a fixing plate 6, the second shaft section 12 is of a cantilever structure, the roller 3 and the bearing 2 are assembled on the second shaft section 12, thrust washers 4 are arranged at two ends of the roller 3, the shaft diameter of the first shaft section 11 is larger than that of the second shaft section 12, and the cross section of the second shaft section 12 is completely covered by the cross section of the first shaft section 11. When the eccentric shaft 1 rotates around the axis of the first shaft section 11, the axis of the second shaft section 12 rotates along with the eccentric shaft, so that the height of the roller 3 assembled on the second shaft section 12 is influenced, and the purpose of adjusting the height of the roller 3 is achieved.

As shown in fig. 12 and 13, in the present embodiment, the fixing plate 6 is sleeved on the end portion of the first shaft section 11, the fixing plate 6 is provided with a light hole 61, one side of the mounting bracket 7, which is fixed to the first shaft section 11, is provided with a plurality of fixing holes 72, and the light hole 61 and the fixing holes 72 are connected by fixing bolts 5. The fixing holes 72 are provided on an arc line within 180 ° of the same virtual circumference below the first shaft section 11. The eccentric shaft 1 rotates to enable the unthreaded hole 61 to be connected with different fixing holes 72, and then the roller 3 can be adjusted from the lowest point to the highest point. The fixed plate 6 is also provided with a threaded jacking hole 62 for drawing out the eccentric shaft 1 through a jackscrew and the like in the disassembly process.

As shown in fig. 11 and 12, in the embodiment, an oil passage 14 is provided on the second shaft section 12 of the eccentric shaft 1, an oil filling port 15 is provided at an end of the first shaft section 11, and the oil filling port 15 is communicated to the oil passage 14, so that lubrication of the bearing 2 is facilitated, and the durability of the lifting mechanism is improved. The end of the first shaft section 11 is provided with a clamping groove 16, so that the eccentric shaft 1 can be conveniently rotated.

In this embodiment, the first shaft section 11 and the second shaft section 12 of the eccentric shaft 1 have circular cross sections, and one side of the mounting bracket 7 is provided with a connecting hole 71 matched with the shaft diameter of the first shaft section 11.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. The adjustable roller mechanism is characterized by comprising an eccentric shaft, a bearing, a roller and a mounting bracket, wherein the roller and the bearing are arranged in the mounting bracket, the eccentric shaft comprises a first shaft section and a second shaft section which are not coaxial, the first shaft section penetrates through one side of the mounting bracket and is fixed through a fixing plate, the roller and the bearing are assembled on the second shaft section, the shaft diameter of the first shaft section is larger than that of the second shaft section, and the cross section of the second shaft section is completely covered by the cross section of the first shaft section.

2. The adjustable roller mechanism according to claim 1, wherein the fixing plate is sleeved on an end of the first shaft section, the fixing plate is provided with a light hole, one side of the mounting bracket fixing the first shaft section is provided with a plurality of fixing holes, the fixing holes are arranged around the first shaft section, and the light hole is connected with the fixing holes through fixing bolts.

3. The adjustable roller mechanism of claim 2, wherein the mounting holes are disposed about the first shaft segment and are distributed on arcs of a common virtual circumference within 180 °.

4. The adjustable roller mechanism of claim 2, wherein the fixed plate is connected to the first shaft segment by welding, and the fixed plate further comprises a threaded jacking hole.

5. The adjustable roller mechanism of claim 1, wherein the end of the first shaft segment of the eccentric shaft is provided with a snap groove.

6. The adjustable roller mechanism of claim 1, wherein thrust washers are provided at both ends of the roller.

7. The adjustable roller mechanism of claim 1, wherein the second shaft section of the eccentric shaft is provided with an oil passage, and the end of the first shaft section is provided with an oil filling port, and the oil filling port is communicated to the oil passage.

8. The adjustable roller mechanism of claim 7, wherein the second shaft section of the eccentric shaft is a cantilevered structure.

9. The adjustable roller mechanism of any one of claims 1-7, wherein the other end of the second shaft section of the eccentric shaft is provided with a third shaft section, which is coaxial with the first shaft section, the shaft diameter of the second shaft section is larger than the shaft diameter of the third shaft section, and the cross section of the third shaft section is completely covered by the cross section of the second shaft section, which passes through the other side of the mounting bracket.

10. The adjustable roller mechanism of claim 8, wherein the second shaft section has a circular cross section, the first shaft section and the third shaft section have a circular cross section or a regular polygon with the same number of sides, and the mounting bracket has connecting holes on both sides thereof for matching with the first shaft section and the third shaft section.