Spherical flexible support device and concrete mixer truck

Abstract

The present invention belongs to the field of concrete mixer trucks and discloses a spherical flexible support device and a concrete mixer truck, comprising a base, a body, and a connecting plate. The base has a mounting hole, the inner wall of the mounting hole comprising an inner spherical surface and a cylindrical surface connected to each other, an elastic sleeve being sleeved on the cylindrical surface, and an axial protrusion being provided on the elastic sleeve. Both sides of the mounting hole have a plane and a first vertical surface connected to each other, and an elastic block is provided on the plane. The body has a receiving cavity, and second vertical surfaces are provided on both sides of the receiving cavity. The two ends of the elastic block are respectively in contact with the first vertical surface and the second vertical surface on the same side. The outer wall of the receiving cavity comprises an outer spherical surface and an outer conical surface connected to each other, the outer spherical surface is in contact with the inner spherical surface, and the outer conical surface is in contact with the elastic sleeve. Lubricant is provided in the receiving cavity, and a plurality of lubrication holes are provided on the side walls of the receiving cavity. A plurality of connectors are provided on the connecting plate, and the connectors are connected to the body. The device effectively compensates for the error angle between the mixing tank and the reducer, improves the overall operating life and reliability, and is low in cost.

Description

Technical Field

[0001] The invention belongs to the field of concrete mixer trucks and relates to a spherical flexible support device and a concrete mixer truck. Background Art

[0002] Concrete mixer trucks are specialized vehicles for transporting construction concrete. Their specialized functions are achieved through the truck's upper assembly system, where the reducer supports and drives the mixing drum, keeping it rotating during transport to prevent the concrete from solidifying. The drum is supported on the truck frame at two points: the rear point on the slideway and the front point on the reducer's output flange. Due to deformation and distortion of the drum and frame after loading and during movement, a slight misalignment angle exists between the drum's rotational axis and the reducer's axis during operation. This misalignment angle must be eliminated to ensure proper operation and longevity of the reducer.

[0003] Currently, the error angle between the mixing drum and the reducer is compensated by the self-aligning bearing that supports the output flange of the reducer. As disclosed in Chinese patent application CN204061749U, the outer ring of the self-aligning bearing is connected to the reducer housing, and the inner ring is connected to the output flange. Between the inner and outer rings is a rolling element that transmits power. The characteristic of this rolling element is that its outer ring is a spherical structure with a certain range of free swing in 360 degrees, thereby compensating for the transmission error angle between the mixing drum and the reducer. However, due to the limited axial load capacity of the self-aligning bearing, when used on a large-capacity mixer truck, the reducer of this structure can only be implemented at a smaller installation angle to reduce the axial force component and reduce damage to the self-aligning bearing, which is not conducive to the application and implementation of the mixer truck. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned prior art method of eliminating the error angle between the mixing barrel and the reducer by supporting the self-aligning bearing of the output flange of the reducer, which not only greatly reduces the axial load-bearing capacity of the reducer but also has the disadvantages of high cost, and to provide a spherical flexible support device and a concrete mixer truck.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] According to a first aspect of the present invention, a spherical flexible support device is provided, comprising a base, a body and a connecting plate; a mounting hole is provided on the base, the inner wall of the mounting hole comprises an inner spherical surface and a cylindrical surface connected to each other, an elastic sleeve is provided on the cylindrical surface, and an axial protrusion extending outward is provided on the side of the elastic sleeve away from the base; a plane and a first vertical surface connected to each other are provided on both sides of the mounting hole, and an elastic block is provided on the plane; a accommodating cavity is provided on the body, and a second vertical surface is provided on both sides of the accommodating cavity; the two ends of the elastic block are respectively in contact with the first vertical surface and the second vertical surface on the same side; the outer wall of the accommodating cavity comprises an outer spherical surface and an outer conical surface connected to each other, the outer spherical surface is in contact with the inner spherical surface, and the outer conical surface is in contact with the elastic sleeve; a lubricant is provided in the accommodating cavity, and a plurality of lubrication holes are provided on the side wall of the accommodating cavity; a plurality of connecting parts are provided on the connecting plate, the connecting parts are connected to the body, and the two sides of the axial protrusion are respectively in contact with the base and the connecting plate.

[0007] Optionally, both ends of the base are provided with through holes for connecting to the front bracket of a concrete mixer truck.

[0008] Optionally, a first sealing groove is provided on the outer spherical surface, and a first sealing ring is arranged in the first sealing groove; the surface of the first sealing ring contacts the inner spherical surface; and all lubrication holes are located on a side of the first sealing ring close to the connecting plate.

[0009] Optionally, the first sealing groove is an annular square groove, and the first sealing ring is an O-ring.

[0010] Optionally, the elastic block and the elastic sleeve are both made of a composite of a metal skeleton and rubber.

[0011] Optionally, the elastic sleeve is a hollow flange structure, an inner conical surface is provided on the inner wall of the flange neck of the elastic sleeve, the inner conical surface contacts the outer conical surface, and the outer wall of the flange neck of the elastic sleeve contacts the cylindrical surface; the upper and lower flange surfaces of the flange plate of the elastic sleeve are in contact with the base and the connecting plate respectively.

[0012] Optionally, the connecting plate is a cylindrical flange structure, the outer wall of the flange neck of the connecting plate contacts the inner wall of the accommodating cavity, and the upper flange surface of the flange disk of the connecting plate contacts the surface of the machine body.

[0013] Optionally, a second sealing groove is provided on the outer wall of the flange neck of the connecting plate, a second sealing ring is provided in the second sealing groove, and a surface of the second sealing ring contacts the inner wall of the accommodating cavity.

[0014] Optionally, the connecting member is a bolt, and the second sealing ring is an O-ring.

[0015] In a second aspect, the present invention provides a concrete mixer truck, comprising a vehicle body and a mixing device, wherein the mixing device comprises a front bracket, a mixing tank, a frame slide, a reducer, a driver, and the above-mentioned spherical flexible support device arranged on the vehicle body; one end of the mixing tank is supported on the flange of the reducer, and the other end is supported on the frame slide, the reducer is connected to the machine body, and the base is connected to the front bracket; the driver is connected to the reducer, and the driver drives the mixing tank through the reducer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The spherical flexible support device of the present invention is designed based on a base, elastic block, body, elastic sleeve, and connecting plate. The spherical surface and elastic components are interconnected to form a whole with a certain degree of flexibility in all directions. It has the characteristics of elastic rotational deformation along the X, Y, and Z axes. When used to support a concrete mixer truck, it can not only meet the load-bearing requirements of the mixing tank in the direction of gravity, but also eliminate the error between the mixing tank and the reducer through its internal spherical support structure and elastic components, offsetting the deviation between the mixing tank axis and the reducer axis caused by assembly error and load deformation. Through the compression of the elastic block and elastic sleeve located between the base and the body, it can absorb the torque generated by the reducer, while reducing the vibration from the reducer and the mixing tank, greatly improving the operating environment of the reducer and the mixing tank device, and increasing the overall operating life and reliability. In addition, it can also greatly improve the axial load-bearing capacity of the reducer. Compared with expensive self-aligning bearings, this structure is inexpensive and is a better support solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a spherical flexible support device according to an embodiment of the present invention.

[0019] Figure 2 For the embodiment of the present invention Figure 1 AA section view.

[0020] Figure 3 Schematic diagram of the base structure of an embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the machine structure of an embodiment of the present invention.

[0022] Figure 5 The figure is a structural schematic diagram of a concrete mixer truck according to an embodiment of the present invention.

[0023] Figure 6 Schematic diagram of the reducer-driver assembly structure according to an embodiment of the present invention.

[0024] Among them: 1-base; 2-elastic block; 3-machine body; 4-connecting plate; 5-elastic sleeve; 6-first sealing ring; 7-second sealing ring; 8-connecting piece; 9-second vertical surface; 10-outer conical surface; 12-outer spherical surface; 13-plane; 14-first vertical surface; 15-inner spherical surface; 16-cylindrical surface; 17-reducer; 18-driver; 19-mixing tank; 20-frame slide; 21-reducer-driver assembly; 22-front bracket. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] The present invention is described in further detail below with reference to the accompanying drawings:

[0028] See also Figures 1 to 4 In one embodiment of the present invention, a spherical flexible support device is provided. This device, through its internal spherical support structure and elastic components, eliminates the error between the mixing tank 19 and the reducer 17, while also reducing vibration. This significantly improves the operating environment of the reducer 17 and mixing tank 19, and increases their overall operating life and reliability. This device not only solves the problem of compensating for the error angle between the mixing tank 19 and the reducer 17, but also significantly improves the axial load-bearing capacity of the reducer 17. Furthermore, compared to expensive self-aligning bearings, this structure is inexpensive, making it a superior support solution.

[0029] Specifically, the spherical flexible support device includes a base 1, a body 3 and a connecting plate 4; a mounting hole is provided on the base 1, the inner wall of the mounting hole includes an inner spherical surface 15 and a cylindrical surface 16 connected to each other, an elastic sleeve 5 is sleeved on the cylindrical surface 16, and an axial protrusion extending outward is provided on the side of the elastic sleeve 5 away from the base 1; a plane 13 and a first vertical surface 14 connected to each other are provided on both sides of the mounting hole, and an elastic block 2 is provided on the plane 13; a receiving cavity 11 is provided on the body 3, and second vertical surfaces 14 are provided on both sides of the receiving cavity 11. vertical surface 9; the two ends of the elastic block 2 are respectively in contact with the first vertical surface 14 and the second vertical surface 9 on the same side; the outer wall of the accommodating chamber 11 includes an outer spherical surface 12 and an outer conical surface 10 connected to each other, the outer spherical surface 12 is in contact with the inner spherical surface 15, and the outer conical surface 10 is in contact with the elastic sleeve 5; a lubricant is provided in the accommodating chamber 11, and a plurality of lubrication holes are provided on the side wall of the accommodating chamber 11; a plurality of connecting members 8 are provided on the connecting plate 4, the connecting member 8 is connected to the body 3, and the two sides of the axial protrusion are respectively in contact with the base 1 and the connecting plate 4.

[0030] To sum up, the spherical flexible support device of the present invention is designed based on the base 1, elastic block 2, body 3, elastic sleeve 5 and connecting plate 4. It is connected to each other by spherical and elastic components to form a whole with certain flexibility in all directions, and has the characteristics of elastic rotation deformation along the X, Y and Z axes. When used to support a concrete mixer truck, it can not only meet the load-bearing requirements of the mixing tank 19 in the gravity direction, but also eliminate the error between the mixing tank 19 and the reducer 21 through its internal spherical support structure and elastic components, and offset the deviation problem between the axis of the mixing tank 19 and the axis of the reducer 21 caused by assembly error and load deformation. Through the compression of the elastic block 2 and the elastic sleeve 5 located between the base 1 and the body 3, the torque generated by the reducer 21 can be absorbed, and at the same time, the vibration from the reducer 21 and the mixing tank 19 can be reduced, which greatly improves the operating environment of the reducer 21 and the mixing tank 19, and improves the overall operating life and reliability. In addition, the axial load-bearing capacity of the reducer 21 can be greatly improved. Compared with expensive self-aligning bearings, this structure is inexpensive and is a better support solution.

[0031] In a possible embodiment, both ends of the base 1 are provided with through holes for connecting to the front bracket 22 of the concrete mixer truck, so as to achieve a stable connection with the front bracket 22 .

[0032] In one possible embodiment, a first sealing groove is defined on the outer spherical surface 12, and a first sealing ring 6 is disposed in the first sealing groove. The surface of the first sealing ring 6 contacts the inner spherical surface 15, and all lubrication holes are located on the side of the first sealing ring 6 close to the connecting plate 4. The first sealing ring 6 seals the lubricant between the spherical surfaces.

[0033] Optionally, the first sealing groove is an annular square groove, and the first sealing ring 6 is an O-ring.

[0034] In one possible embodiment, both the elastic block 2 and the elastic sleeve 5 are made of a metal frame and rubber composite, possessing a certain elastic stiffness, or other materials with similar stiffness. Two elastic blocks 2 are mounted between the base 1 and the body 3, contacting the flat surface 13, the first vertical surface 14, and the second vertical surface 9, respectively.

[0035] In a possible embodiment, the elastic sleeve 5 is a hollow flange structure, an inner conical surface is provided on the inner wall of the flange neck of the elastic sleeve 5, the inner conical surface contacts the outer conical surface 10, and the outer wall of the flange neck of the elastic sleeve 5 contacts the cylindrical surface 16; the upper and lower flange surfaces of the flange plate of the elastic sleeve 5 contact the base 1 and the connecting plate 4 respectively.

[0036] In a possible embodiment, the connecting plate 4 is a cylindrical flange structure, the outer wall of the flange neck of the connecting plate 4 contacts the inner wall of the accommodating cavity 11 , and the upper flange surface of the flange of the connecting plate 4 contacts the surface of the body 3 .

[0037] In one possible embodiment, a second sealing groove is formed on the outer wall of the flange neck of the connecting plate 4. A second sealing ring 7 is disposed in the second sealing groove. The surface of the second sealing ring 7 contacts the inner wall of the accommodating cavity 11. The second sealing ring 7 is used to seal the lubricant in the accommodating cavity 11.

[0038] Optionally, the connecting member 8 is a bolt, and the second sealing ring 7 is an O-ring. The connecting plate 4 is connected to the body 3 by assembling the bolts.

[0039] When in use, the spherical flexible support device of the present invention comprises a base 1 with two left and right planar surfaces 13, two first vertical surfaces 14, an inner spherical surface 15, and an inner cylindrical surface 16. Holes are provided on both sides for connecting the reducer 17 to the front bracket 22. Two elastic blocks 2 are mounted on the two planar surfaces 13. These blocks are made of a metal frame and rubber composite. Their other two vertical surfaces contact the first vertical surfaces 14 of the base. The inner spherical surface 15 of the base 1 contacts the outer spherical surface 12 of the body 3. Lubricant is applied to the outer spherical surface 12, and the accommodating cavity 11 is filled with lubricant. A first sealing groove is defined in the outer spherical surface 12, and a first sealing ring 6 is positioned within the groove to prevent lubricant from squeezing out between the two sealed spherical surfaces. The two second vertical surfaces 9 of the body 3 contact the outer vertical surfaces of the elastic blocks 2, maintaining a certain pre-compression deformation. An elastic sleeve 5 is mounted between the cylindrical surface 16 of the base 1 and the outer conical surface 10 of the body 3. The sleeve 5 is made of a metal frame and rubber composite and has a certain degree of rigidity and elasticity. The connecting plate 4 is connected to the machine body 3 by bolts, and the elastic sleeve 5 is compressed between the base 1 and the machine body 3 to maintain a certain pre-compression deformation.

[0040] See also Figures 5 to 6In another embodiment of the present invention, a concrete mixer truck is provided, including a vehicle body and a mixing device, wherein the mixing device includes a front bracket 22 arranged on the vehicle body, a mixing tank 19, a frame slide 20, a reducer 17, a driver 18 and the above-mentioned spherical flexible support device.

[0041] One end of the mixing tank 19 is supported on the flange of the reducer 17, and the other end is supported on the frame slide 20. The reducer 17 is connected to the body 3, and the base 1 is connected to the front bracket 22; the driver 18 is connected to the reducer 17, and the driver 18 drives the mixing tank 19 through the reducer 17.

[0042] The driver 18 and reducer 17 form a reducer-driver assembly 21. The front of the tank 19 is supported on the flange of the reducer 17, and the rear point is supported on the frame slide 20. The reducer 17 can be integrally manufactured with the body 3 or fixedly connected. The base 1 is connected to or integrally supported by the front bracket 22, thus forming the reducer-driver assembly 21 and the tank 19 into a rigid unit.

[0043] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A spherical flexible support device, characterized in that: It comprises a base (1), a body (3) and a connecting plate (4); A mounting hole is provided on the base (1), the inner wall of the mounting hole comprises an inner spherical surface (15) and a cylindrical surface (16) connected to each other, an elastic sleeve (5) is sleeved on the cylindrical surface (16), and an axial protrusion extending outward is provided on the side of the elastic sleeve (5) away from the base (1); a plane (13) and a first vertical surface (14) connected to each other are provided on both sides of the mounting hole, and an elastic block (2) is provided on the plane (13); A housing (11) is provided on the body (3), and second vertical surfaces (9) are provided on both sides of the housing (11); two ends of the elastic block (2) are in contact with the first vertical surface (14) and the second vertical surface (9) on the same side respectively; the outer wall of the housing (11) includes an outer spherical surface (12) and an outer conical surface (10) connected to each other, the outer spherical surface (12) is in contact with the inner spherical surface (15), and the outer conical surface (10) is in contact with the elastic sleeve (5); a lubricant is provided in the housing (11), and a plurality of lubrication holes are provided on the side wall of the housing (11); A plurality of connecting pieces (8) are provided on the connecting plate (4), the connecting pieces (8) are connected to the machine body (3), and the two sides of the axial protrusion are in contact with the base (1) and the connecting plate (4) respectively.

2. The spherical flexible support device according to claim 1, characterized in that: Both ends of the base (1) are provided with through holes for connecting to the front bracket (22) of the concrete mixer truck.

3. The spherical flexible support device according to claim 1, characterized in that: A first sealing groove is provided on the outer spherical surface (12), and a first sealing ring (6) is provided in the first sealing groove; The surface of the first sealing ring (6) contacts the inner spherical surface (15); and all lubrication holes are located on a side of the first sealing ring (6) close to the connecting plate (4).

4. The spherical flexible support device according to claim 3, characterized in that: The first sealing groove is an annular square groove, and the first sealing ring (6) is an O-type sealing ring.

5. The spherical flexible support device according to claim 1, characterized in that: The elastic block (2) and the elastic sleeve (5) are both made of a composite of a metal skeleton and rubber.

6. The spherical flexible support device according to claim 1, characterized in that: The elastic sleeve (5) is a hollow flange structure. An inner conical surface is provided on the inner wall of the flange neck of the elastic sleeve (5), the inner conical surface contacts the outer conical surface (10), and the outer wall of the flange neck of the elastic sleeve (5) contacts the cylindrical surface (16); the upper and lower flange surfaces of the flange plate of the elastic sleeve (5) contact the base (1) and the connecting plate (4) respectively.

7. The spherical flexible support device according to claim 1, characterized in that: The connecting plate (4) is a cylindrical flange structure, the outer wall of the flange neck of the connecting plate (4) contacts the inner wall of the accommodating cavity (11), and the upper flange surface of the flange disc of the connecting plate (4) contacts the surface of the machine body (3).

8. The spherical flexible support device according to claim 7, characterized in that: A second sealing groove is provided on the outer wall of the flange neck of the connecting plate (4), a second sealing ring (7) is arranged in the second sealing groove, and the surface of the second sealing ring (7) contacts the inner wall of the accommodating cavity (11).

9. The spherical flexible support device according to claim 8, characterized in that: The connecting member (8) is a bolt, and the second sealing ring (7) is an O-type sealing ring.

10. A concrete mixer truck, comprising a truck body and a mixing device, characterized in that: The stirring device comprises a front bracket (22) arranged on the vehicle body, a stirring tank (19), a frame slideway (20), a reducer (17), a driver (18), and a spherical flexible support device according to any one of claims 1 to 9; One end of the mixing tank (19) is supported on the flange of the reducer (17), and the other end is supported on the frame slide (20). The reducer (17) is connected to the machine body (3), and the base (1) is connected to the front bracket (22). The driver (18) is connected to the reducer (17), and the driver (18) drives the mixing tank (19) through the reducer (17).

Images