A material weighing mechanism and a road maintenance machine

Abstract

A material weighing mechanism and a road maintenance machine relate to the technical field of material weighing and road maintenance machines, including a cantilever beam type weighing sensor, and also including a first connecting seat, a second connecting seat and a joint bearing, the joint bearing is connected between the first connecting seat and the second connecting seat, and the first connecting seat and the second connecting seat are provided with a relative sliding stroke in the horizontal direction, the cantilever beam type weighing sensor is fixed to the lower end of the second connecting seat, and the material weighing mechanism and the road maintenance machine with the material weighing mechanism have high weight measurement accuracy for materials when in use, small repeated measurement error and high data reliability.

Description

Technical field:

[0002] The invention relates to the technical field of material weighing and road maintenance machines, and in particular to a material weighing mechanism and a road maintenance machine. Background technology:

[0004] The pavement maintenance machine / vehicle used for highway maintenance usually works by transporting asphalt concrete materials to the construction site, or performing on-site hot regeneration of waste asphalt concrete materials at the construction site. Therefore, it must be equipped with an asphalt concrete silo with heating and insulation functions. Since the silo is fully enclosed, it is impossible to visually measure the materials in the silo. The traditional method of measuring the materials in the silo is to use a fixed-capacity hopper to load the silo, and to calculate the weight of the materials in the silo by calculating the number of times the hopper is loaded. This is not only quite troublesome, but also causes inaccurate weight calculations because it is impossible to ensure that the hopper is filled every time the material is loaded.

[0005] In the prior art, weighing sensors can be used to weigh materials in engineering machinery, special vehicles and other equipment with material storage and transportation functions. Weighing sensors are generally fixed between the silo and the frame by direct rigid connection. However, in actual use, the uneven pressure of the material in the silo on the silo, thermal expansion and contraction and other factors will cause the silo to deform and generate stress, which in turn generates force on the weighing sensor, resulting in poor measurement accuracy, measurement data drift, repeated measurement data deviation and other problems. The prior art lacks a weighing mechanism with high measurement accuracy and reliable measurement data and a road maintenance machine with such a weighing mechanism. Summary of the invention:

[0007] In order to solve the above technical problems, the present invention provides a material weighing mechanism and a road maintenance machine, which have high weight measurement accuracy for materials, small repeated measurement errors and high data reliability when used.

[0008] The present invention is achieved through the following technical solutions:

[0009] A material weighing mechanism includes a cantilever beam type weighing sensor, which is characterized in that it also includes a first connecting seat, a second connecting seat and a joint bearing, the joint bearing is connected between the first connecting seat and the second connecting seat, and the first connecting seat and the second connecting seat are provided with a relative sliding stroke in the horizontal direction, and the cantilever beam type weighing sensor is fixed at the lower end of the second connecting seat.

[0010] In another aspect of the present invention, the outer ring of the spherical bearing is fixed in the first connecting seat, a connecting shaft is fixed on the second connecting seat, and the inner ring of the spherical bearing is slidably mounted on the connecting shaft along the axial direction of the connecting shaft.

[0011] In another aspect of the present invention, the first connecting seat includes an upper connecting plate and a mounting plate vertically fixed to the lower end of the upper connecting plate, and the outer ring of the spherical bearing is mounted in the mounting plate.

[0012] In another aspect of the present invention, the second connecting seat includes a lower connecting plate and two supporting plates vertically fixed to the upper end of the lower connecting plate, the connecting shaft is fixed between the two supporting plates, and a space is reserved between the two supporting plates for the first connecting seat to move.

[0013] In another aspect of the present invention, a weighing display controller is further included, and the weighing display controller is connected to the weighing sensor via a cable.

[0014] A road maintenance machine includes a silo and a chassis, characterized in that the silo is a vertically arranged cylindrical or cubic type with a square horizontal cross-section, and no less than three material weighing mechanisms as described above are supported between the silo and the chassis, and the material weighing mechanisms are distributed around the vertical center line of the silo.

[0015] In another aspect of the present invention, the silo includes a silo beam, and the side ends of the silo beam are fixed with upper brackets corresponding to the material weighing mechanism one by one. The chassis includes a chassis beam, and the side ends of the chassis beam are fixed with lower brackets corresponding to the material weighing mechanism one by one. The first connecting seat is connected and fixed to the upper bracket, and the bottom supporting end of the cantilever beam type weighing sensor is connected and fixed to the lower bracket.

[0016] In another aspect of the present invention, a gap of 3-5 mm is reserved between the silo beam and the chassis beam.

[0017] In another aspect of the present invention, the number of the material weighing mechanisms is four, and the center lines of the connecting axes of the diagonal material weighing mechanisms coincide with each other and intersect with the vertical center line of the silo.

[0018] In another aspect of the present invention, the angle between the center line of the connecting shaft of the diagonal material weighing mechanism and the body direction of the road maintenance machine is 45°.

[0019] The beneficial effects of the present invention are:

[0020] When the silo of the road maintenance machine is deformed due to factors such as the uneven pressure of the material on the silo, thermal expansion and contraction, etc., the first connecting seat and the second connecting seat of the material weighing mechanism in the present invention can be adaptively adjusted in angle and can slide relatively in the horizontal direction, thereby effectively adapting to the deformation of the silo, releasing the stress generated in the silo by factors such as the uneven pressure of the material, thermal expansion and contraction, and thus effectively avoiding or reducing the adverse effects of stress on the measurement of the weighing sensor, thereby obtaining higher measurement accuracy, small repeated measurement errors, and high data reliability;

[0021] In the present invention, the number of material weighing mechanisms of the road maintenance machine is preferably 4. This is because the more material weighing mechanisms there are, the more difficult it is to adapt to the deformation of the silo. Compared with the number of material weighing mechanisms set to 3, the 4 material weighing mechanisms can be distributed symmetrically left and right in pairs and symmetrically front and back in pairs. This distribution makes the force on each weighing sensor more balanced when the road maintenance machine is located forward or sideways on the ramp, thereby obtaining higher measurement accuracy; the setting of an angle of 45° between the center line of the connecting axis of the diagonal material weighing mechanism and the body direction of the road maintenance machine makes the 4 material weighing mechanisms more evenly distributed, thereby better adapting to the deformation of the silo. The uniform distribution also makes the weighing sensor more evenly stressed, thereby obtaining higher measurement accuracy. Description of the drawings:

[0023] Figure 1 This is a schematic diagram of the internal structure of Example 1 of the present invention from a side view.

[0024] Figure 2 This is a front view structural schematic diagram of Example 1 of the present invention.

[0025] Figure 3 It is a schematic diagram of the side structure of embodiment 2 of the present invention.

[0026] Figure 4 This is a schematic diagram of the position of the material weighing mechanism from a top view of Example 2 of the present invention.

[0027] Figure 5 It is a top view schematic diagram of the positional relationship between the silo and the material weighing mechanism in Example 2 of the present invention.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the silo in Example 2 of the present invention.

[0029] Figure 7 This is a schematic diagram of the installation structure of the material weighing mechanism in Example 2 of the present invention.

[0030] Figure 8 It is a schematic diagram of the connection between the weighing display controller and the cantilever beam weighing sensor in the present invention.

[0031] In the accompanying drawings: 1. joint bearing, 2. first connecting seat, 201. upper connecting plate, 202. mounting plate, 3. second connecting seat, 301. support plate, 302. lower connecting plate, 4. cantilever beam type weighing sensor, 5. connecting shaft, 6. material weighing mechanism, 7. silo beam, 8. upper bracket, 9. lower bracket, 10. chassis beam, 11. silo, 12. continuous feeding mechanism, 13. weighing display controller, 14. switch output port. Specific implementation method:

[0033] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings and embodiments:

[0034] In the description of the present invention, it is necessary to understand that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1

[0037] A material weighing mechanism includes a cantilever beam type weighing sensor 4, a first connecting seat 2, a second connecting seat 3 and a spherical bearing 1, wherein the spherical bearing 1 is connected between the first connecting seat 2 and the second connecting seat 3, and the first connecting seat 2 and the second connecting seat 3 are provided with a relative sliding stroke in the horizontal direction, and the cantilever beam type weighing sensor 4 is fixed to the lower end of the second connecting seat 3 by bolts. In this embodiment, the cantilever beam type weighing sensor 4 is supported at both ends, and the middle is a cantilever deformation area, and the lower end of the second connecting seat is fixed to the cantilever deformation area in the middle of the cantilever beam type weighing sensor. In this embodiment, the cantilever beam type weighing sensor adopts a cantilever beam type weighing sensor of model DYZC-055 produced by Bengbu Dayang Sensing System Engineering Co., Ltd. In this embodiment, the outer ring of the spherical bearing is fixed in the first connecting seat, and a connecting shaft 5 is fixed on the second connecting seat 3. The inner ring of the spherical bearing 1 is slidably sleeved on the connecting shaft 5 along the axial direction of the connecting shaft 5. Specifically, the connecting shaft 5 and the inner ring of the spherical bearing 1 are clearance fit. In this embodiment, the first connection seat 2 includes an upper connection plate 201 and a mounting plate 202 vertically fixed to the lower end of the upper connection plate. The upper connection plate 201 and the mounting plate 202 can be an integral structure or welded, and the outer ring of the spherical bearing is embedded and installed in the mounting plate. The second connection seat 3 includes a lower connection plate 302 and two support plates 301 vertically fixed to the upper end of the lower connection plate 302. The lower connection plate 302 and the two support plates 301 can be an integral structure or welded, and the connecting shaft 5 is assembled between the two support plates 301. In this embodiment, an assembly plate is fixed at one end of the connecting shaft 5, and the connecting shaft 5 passes through the two support plates 301, and the assembly plate is fixed to one of the support plates by bolts. There is a space for the first connection seat to move between the two support plates 301, so that the angle between the first connection seat and the second connection seat can be changed and can slide relative to each other along the connecting shaft 5. It also includes a weighing display controller 13, which is connected to a weighing sensor via a cable. The weighing sensor outputs an electrical signal that enters the weighing display controller 13, and after processing, the real-time weight is displayed on a display screen. The weighing display controller has a switch output port 14, which is used to output an alarm signal or to control a device equipped with such a material weighing mechanism to perform corresponding actions, such as controlling the on and off of the continuous feeding mechanism 12 of the road maintenance machine in Example 2.

[0038] The material weighing mechanism in the present invention is provided with a universally rotatable spherical bearing and a relative sliding stroke is provided between the first connecting seat 2 and the second connecting seat 3, so that there is an angle adjustment margin between the first connecting seat and the second connecting seat and a relative movement margin in the horizontal direction. When this material weighing mechanism is applied to a road maintenance machine, when the silo of the road maintenance machine is deformed due to factors such as the unbalanced pressure of the material in the silo on the silo, thermal expansion and contraction, etc., the first connecting seat and the second connecting seat of this material weighing mechanism can be adaptively adjusted in angle and can slide relatively in the horizontal direction, thereby effectively adapting to the deformation of the silo, releasing the stress generated in the silo by factors such as the unbalanced pressure of the material, thermal expansion and contraction, thereby effectively avoiding or reducing the adverse effects of stress on the measurement of the weighing sensor, thereby obtaining higher measurement accuracy, small repeated measurement errors, and high data reliability.

[0039] Example 2

[0040] A road maintenance machine includes a silo 11 and a chassis. The silo 11 is a vertically arranged cylindrical type or a cubic type with a square horizontal cross section. In this embodiment, the cylindrical type is taken as an example. No less than three material weighing mechanisms as described in Example 1 are supported between the silo 11 and the chassis. The material weighing mechanisms are distributed around the vertical center line of the silo 11. The silo includes a silo beam 7, and the side end of the silo beam 7 is welded and fixed with an upper bracket 8 corresponding to the material weighing mechanism. The chassis includes a chassis beam 10, and the side end of the chassis beam 10 is welded and fixed with a lower bracket 9 corresponding to the material weighing mechanism. The upper connecting plate of the first connecting seat is connected and fixed to the upper bracket 8 by bolts, and the bottom supporting end of the cantilever beam type weighing sensor is connected and fixed to the lower bracket 9 by bolts. A gap of 3-5 mm is reserved between the silo beam and the chassis beam. In this embodiment, the number of the material weighing mechanisms is 4, the center lines of the connecting axes 5 of the diagonal material weighing mechanisms coincide with each other and intersect with the vertical center line of the silo 11, and the angle between the center lines of the connecting axes 5 of the diagonal material weighing mechanisms and the body direction of the road maintenance machine is 45°.

[0041] When the silo of this road maintenance machine is deformed due to factors such as uneven pressure of materials on the silo, thermal expansion and contraction, the first connecting seat and the second connecting seat of the material weighing mechanism on the road maintenance machine can be adaptively adjusted in angle and can slide relatively in the horizontal direction, thereby effectively adapting to the deformation of the silo and releasing the stress generated in the silo by factors such as uneven pressure of materials and thermal expansion and contraction, thereby effectively avoiding or reducing the adverse effects of stress on the measurement of the weighing sensor, thereby obtaining higher measurement accuracy, small repeated measurement errors, and high data reliability.

[0042] The number and distribution of material weighing mechanisms in this road maintenance machine can have higher weighing accuracy. This is because the more material weighing mechanisms there are, the more difficult it is to adapt to the deformation of the silo. Compared with the material weighing mechanisms set to 3, the 4 material weighing mechanisms can be distributed symmetrically in pairs left and right, and symmetrically in pairs front and back. This distribution makes the force on each weighing sensor more balanced when the road maintenance machine is located forward or sideways on the ramp, thereby obtaining higher measurement accuracy; the setting of the angle of 45° between the center line of the connecting axis of the diagonal material weighing mechanism and the body direction of the road maintenance machine makes the 4 material weighing mechanisms more evenly distributed, thereby better adapting to the deformation of the silo. The uniform distribution also makes the weighing sensor more evenly stressed, thereby obtaining higher measurement accuracy.

[0043] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A material weighing mechanism, used for weighing materials in engineering machinery or special vehicle equipment with material storage and transportation functions, supported between a silo (11) and a chassis, comprising a cantilever beam type weighing sensor (4), characterized in that , further comprising a first connecting seat (2), a second connecting seat (3) and a joint bearing (1), wherein the joint bearing (1) is connected between the first connecting seat (2) and the second connecting seat (3), and the first connecting seat (2) and the second connecting seat (3) are provided with a relative sliding stroke in the horizontal direction, and the cantilever beam type weighing sensor (4) is fixed to the lower end of the second connecting seat (3); The outer ring of the spherical bearing (1) is fixed in the first connecting seat (2), a connecting shaft (5) is fixed on the second connecting seat (3), the axial direction of the connecting shaft (5) is horizontal, and the inner ring of the spherical bearing (1) is slidably sleeved on the connecting shaft (5) along the axial direction of the connecting shaft (5); No less than three material weighing mechanisms are supported between the silo (11) and the chassis. The material weighing mechanisms are distributed around the vertical center line of the silo (11), and the center line of the connecting shaft (5) of the material weighing mechanism intersects with the vertical center line of the silo.

2. A material weighing mechanism according to claim 1, characterized in that The first connecting seat (2) comprises an upper connecting plate (201) and a mounting plate (202) vertically fixed to the lower end of the upper connecting plate, and the outer ring of the spherical bearing (1) is mounted inside the mounting plate (202).

3. A material weighing mechanism according to claim 1, characterized in that The second connecting seat (3) comprises a lower connecting plate (302) and two supporting plates (301) vertically fixed to the upper end of the lower connecting plate (302); the connecting shaft (5) is fixed between the two supporting plates (301); and a space for the first connecting seat (2) to move is reserved between the two supporting plates (301).

4. A material weighing mechanism according to claim 1, characterized in that , further comprising a weighing display controller (13), wherein the weighing display controller (13) is connected to the weighing sensor via a cable.

5. A road maintenance machine, comprising a silo (11) and a chassis, characterized in that The silo (11) is a vertically arranged cylindrical or cubical silo with a square horizontal cross-section. No less than three material weighing mechanisms as described in claim 1 are supported between the silo (11) and the chassis. The material weighing mechanisms are distributed around the vertical center line of the silo (11).

6. A road maintenance machine according to claim 5, characterized in that The silo comprises a silo beam (7), an upper bracket (8) corresponding to a material weighing mechanism is fixed to the side end of the silo beam (7), the chassis comprises a chassis beam (10), a lower bracket (9) corresponding to the material weighing mechanism is fixed to the side end of the chassis beam (10), the first connecting seat (2) is connected and fixed to the upper bracket, and the bottom support end of the cantilever beam type weighing sensor is connected and fixed to the lower bracket.

7. A road maintenance machine according to claim 6, characterized in that A gap of 3-5 mm is reserved between the silo beam (7) and the chassis beam (10).

8. A road maintenance machine according to any one of claims 5 to 7, characterized in that The number of the material weighing mechanisms is four, and the center lines of the connecting axes (5) of the diagonal material weighing mechanisms coincide with each other and intersect with the vertical center line of the silo (11).

9. A road maintenance machine according to claim 8, characterized in that The included angle between the center line of the connecting shaft (5) of the diagonal material weighing mechanism and the body direction of the road maintenance machine is 45°.

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