A micro loader test bench

Abstract

The present invention discloses a micro loader test bench, which includes a base, a trolley, a driving device, a suspension part and a working part; two guide rails are provided on the base, and sliders for fixedly connecting with the trolley are provided on both guide rails. Two racks are also provided on the base, the racks are parallel to the guide rails, and the racks are used for driving connection with the driving device. The driving device is arranged on the suspension part, the suspension part is arranged on the trolley, both ends of the driving device pass through the side wall of the trolley and gears are arranged at the ends, the gears are meshed with the racks, the suspension part is connected with the working part through a sensing part, a plurality of first force sensors are arranged at the bottom end of the suspension part, and a blanking plate for the working part to shovel is provided on the base. The micro loader test bench solves the problem of slipping between the trolley and the base through the gear-rack transmission, adopts a small test bench, is convenient for replacing the bucket, studies the characteristics of the bucket shape, and makes the data acquisition more abundant through the setting of a plurality of force sensors.

Description

Technical Field

[0001] The present invention relates to the field of mechanical technology, and more specifically to a micro loader test bench. Background Art

[0002] Currently, the existing test bench uses belt drive, and the screw rod rotates to control the forward and backward movement of the equipment. However, belt drive is prone to slipping and the speed control is inaccurate. In addition, the existing test bench is a large test bench, which is not convenient for replacing the bucket and not conducive to studying the characteristics of the bucket shape during the loading process. At the same time, the existing test bench uses four one-dimensional force sensors, which can only measure parameters such as height, the angle between the bucket teeth and the horizontal plane, the speed of inserting into the material pile, the insertion depth, and the magnitude of the thrust force during insertion, and the obtained parameters are not rich enough.

[0003] Therefore, how to provide a micro loader test bench that is conducive to speed control, solves the problem of large belt drive slip, is convenient for replacing the bucket, and can obtain parameters such as loading resistance, bucket loading gravity, tipping force, torsional force, and forward tilting force is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a micro loader test bench, which solves the problems in the prior art such as belt drive being prone to slipping, inaccurate speed control, insufficient data acquisition, and the test bench being too large to facilitate the study of the influence of the bucket shape on the loading process.

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

[0006] A micro loader test bench includes: a base, a trolley, a driving device, a suspension part, and a working part;

[0007] Two parallel guide rails are provided on the base. Sliders for fixedly connecting with the trolley are provided on both of the two guide rails. Two racks are also provided on the base. The racks are parallel to the guide rails and are used for driving connection with the driving device. The driving device is arranged on the suspension part, the suspension part is arranged on the trolley. Both ends of the driving device pass through the side wall of the trolley and gears are provided at the ends. The gears are meshed with the racks. The suspension part is connected with the working part through a sensing part. A plurality of first force sensors are provided at the bottom end of the suspension part. A blanking plate for the working part to shovel is provided on the base.

[0008] Further, the driving device includes a servo motor, a universal coupling, and a connecting rod. The servo motor is disposed on the trolley. There are two universal couplings and two connecting rods, and the two universal couplings and the connecting rods are symmetrically arranged on both sides of the servo motor. One end of the universal coupling is connected to the servo motor, and the other end is connected to the connecting rod. The gear is provided at the end of the connecting rod.

[0009] Further, the trolley includes a frame, a motor mount, and a bearing block. The motor mount is located above the frame and its two ends tend towards the frame and are fixed to the frame. The bearing block is located in the extending direction of the motor mount and is fixedly connected to the frame. The frame is fixedly connected to the slider. The motor mount is used to fix the servo motor, and the bearing block is used to drive the connecting rod.

[0010] Further, a wire rope sensor is further included. The wire rope sensor is fixed on the base and close to one side of the trolley. The free end of the wire rope sensor is fixedly connected to the frame and is used to measure the forward movement of the trolley.

[0011] Further, the sensing part includes a first support plate and a second support plate. A plurality of second force sensors are provided between the first support plate and the second support plate. The first support plate is connected to the suspension part, and the second support plate is used to fix the working part.

[0012] Further, the working part includes a bucket, a connecting rod, a driving arm, a lifting cylinder, a fixing plate, a tilting cylinder, and a tilting boom;

[0013] The fixing plate is fixedly connected to the second support plate. There are two driving arms, and the two driving arms are connected by a cross bar. The cross bar is located in the middle part of the driving arms. One end of each of the two driving arms is pivotally connected to the bucket, and the other end of each of them is also pivotally connected to the bucket. There are two lifting cylinders, and the two lifting cylinders correspond to the two driving arms one by one. One end of the lifting cylinder is pivotally connected to the fixing plate, and the other end of each of them is pivotally connected to the driving arm to drive the lifting of the bucket. A support seat is provided on the cross bar, and the middle part of the tilting boom is pivotally connected to the support seat. One end of the tilting boom is rotationally connected to the bucket through the connecting rod, and the other end is rotationally connected to the fixing plate through the tilting cylinder.

[0014] Further, a micro displacement sensor for detecting the elongation of the lifting cylinder and the tilting cylinder is provided on one side of each of the lifting cylinder and the tilting cylinder.

[0015] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a micro loader test bench. By providing a rack on the base and gears at both ends of the driving device, and through the gear-rack transmission, the problem of slipping between the trolley and the base can be solved. At the same time, by controlling the speed, the data obtained from the experiment can be made closer to the actual value. By using a small test bench, it is convenient to replace the bucket and study the characteristics of the bucket shape during the loading process. By providing a plurality of first force sensors at the bottom of the suspension part and a plurality of second force sensors between the working part and the suspension part, it is possible to measure the loading resistance, bucket loading gravity, overturning force, torsional force, and forward tilting force suffered by the working part during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0017] Figure 1 The drawing is a schematic diagram of the overall structure of the micro loader test bench provided by the present invention;

[0018] Figure 2 The drawing is a schematic diagram of the structure of the blanking plate provided by the present invention;

[0019] Figure 3 The drawing is a schematic diagram of the structure of the base provided by the present invention;

[0020] Figure 4 The drawing is a schematic diagram of the structure of the trolley provided by the present invention;

[0021] Figure 5 The drawing is a schematic diagram of the structure of the driving device provided by the present invention;

[0022] Figure 6 The drawing is a schematic diagram of the structure of the suspension part provided by the present invention;

[0023] Figure 7 The drawing is a schematic diagram of the structure of the sensing part provided by the present invention;

[0024] Figure 8 The drawing is a schematic diagram of the structure of the working part provided by the present invention.

[0025] Wherein: 1 is a blanking plate, 11 is a horizontal plate; 12 is an inclined plate; 2 is a base; 21 is a guide rail; 22 is a slider; 23 is a rack; 24 is a first base plate; 25 is a second base plate; 3 is a trolley; 31 is a frame; 32 is a motor mount; 33 is a bearing seat; 4 is a driving device; 41 is a servo motor; 42 is a universal coupling; 43 is a connecting rod; 5 is a suspension part; 51 is a suspension bracket; 52 is a connecting piece; 6 is a sensing part; 61 is a first support plate; 62 is a second support plate; 7 is a working part; 71 is a bucket; 72 is a connecting rod; 73 is a driving arm; 74 is a lifting cylinder; 75 is a fixing plate; 76 is a tilting cylinder; 77 is a tilting boom; 78 is a cross bar; 79 is a micro displacement sensor; 8 is a gear; 9 is a wire drawing sensor; 10 is a first force sensor; 20 is a second force sensor. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] See the attached Figure 1-8 , the embodiment of the present invention discloses a micro loader test bench, including: a base 2, a trolley 3, a driving device 4, a suspension part 5 and a working part 7;

[0028] The base 2 is spliced into a rectangular structure by two first base plates 24 and two second base plates 25. Rack 23 is respectively arranged on the two second base plates 25. Two guide rails 21 are arranged inside the two racks 23. Three sliders 22 are arranged on each guide rail 21. The slider 22 is used to fix the trolley 3. At the same time, gears 8 are arranged at both ends of the driving device 4. The rack 23 meshes with the gear 8. Under the action of the driving device 4, the gear 8 moves on the rack 23, thereby driving the trolley 3 to move forward or backward on the guide rail 21.

[0029] The driving device 4 includes a servo motor 41, a universal coupling 42 and a connecting rod 43. The servo motor 41 is arranged on the trolley 3. There are two universal couplings 42 and connecting rods 43. The two universal couplings 42 and connecting rods 43 are symmetrically arranged on both sides of the servo motor 41. One end of each of the two universal couplings 42 is connected to the servo motor 41, and the other end is connected to the connecting rod 43. The end of the connecting rod 43 is provided with a gear 8.

[0030] The trolley 3 includes a frame 31, a motor mount 32 and a bearing block 33. The motor mount 32 is located above the frame 31. The motor mount 32 is of a double-arch structure. Both ends of the double-arch structured motor mount 32 bend downward and tend to the frame 31 and are fixed to the frame 31. A through hole for passing through a connecting rod 43 is provided at the middle position of the connection between the double-arch structured motor mount 32 and the frame 31. The bearing block 33 is fixedly installed on the periphery of the outer through hole of the frame 31. The frame 31 is fixed on the slider 22. The servo motor 41 is installed on the motor mount 32. The end of the connecting rod 43 far from the servo motor 41 passes through the through hole on the frame 31 and extends to the outside of the frame 31 above the rack 23. The gear 8 fixed to the end of the connecting rod 43 is in meshing transmission with the rack 23. A suspension part 5 is further provided below the servo motor 41. The suspension part 5 includes a suspension bracket 51 and a connecting piece 52. There are two suspension brackets 51. The suspension bracket 51 is welded into an L-shaped structure by a vertical angle iron and a horizontal angle iron. The two suspension brackets 51 are arranged oppositely with a groove formed in the middle. The connecting piece 52 is fixedly arranged on the outer wall of the vertical angle iron for fixing the two suspension brackets 51. The servo motor 41 is located in the groove formed by the horizontal angle iron and is fixed to the motor mount 32. In this embodiment, three first force sensors 10 are provided at the bottom of the horizontal angle iron. The three first force sensors 10 are used to measure the force during the shoveling process of the working part 7. In other embodiments, the first force sensors 10 at the bottom of the horizontal angle iron are set according to actual needs, and the quantity is not specifically limited herein.

[0031] Specifically, a wire-pulling sensor 9 is further included. The wire-pulling sensor 9 is fixed to the first bottom plate 24 behind the trolley 3. The free end of the wire-pulling sensor 9 is fixedly connected to the frame 31 for measuring the forward movement of the trolley 3. A blanking plate 1 for the working part 7 to shovel is provided on the base 2 in front of the trolley 3. The blanking plate 1 includes a horizontal plate 11 and an inclined plate 12. The horizontal plate 11 is fixedly arranged between the two guide rails 21. One side edge of the inclined plate 12 is fixedly connected to the horizontal plate 11. The inclined plate 12 is inclined at an angle with the horizontal plate 11. In this embodiment, the included angle formed by the inclined plate 12 and the horizontal plate 11 on the side close to the trolley 3 is an obtuse angle. The working part 7 is fixed to the connecting piece 52 through the sensing part 6.

[0032] Specifically, the sensing part 6 includes a first support plate 61 and a second support plate 62. Three second force sensors 20 are clamped between the first support plate 61 and the second support plate 62. The three second force sensors 20 are used to measure the force during the shoveling process of the working part 7. The first support plate 61 and the second support plate 62 are connected through the three second force sensors 20. In other embodiments, the second force sensors 20 between the first support plate 61 and the second support plate 62 can be specifically set according to actual needs, and the quantity is not specifically limited herein. The first support plate 61 is fixedly connected to the vertical angle iron of the suspension bracket 51 and is located above the connecting piece 52. The second support plate 62 is used for fixedly installing the working part 7.

[0033] Specifically, the working part 7 includes a bucket 71, a connecting rod 72, a driving arm 73, a lifting cylinder 74, a fixing plate 75, a tilting cylinder 76 and a tilting boom 77;

[0034] The fixing plate 75 is fixedly connected to the second support plate 62. There are two driving arms 73. The two driving arms 73 are connected by a cross bar 78. The two ends of the cross bar 78 are respectively connected to the middle parts of the two driving arms 73. One ends of the two driving arms 73 are pivotally connected to the fixing plate 75, and the other ends of the two driving arms 73 are pivotally connected to the bucket 71. There are two lifting cylinders 74. The two lifting cylinders 74 correspond to the two driving arms 73 one by one. One end of the lifting cylinder 74 is pivotally connected to the fixing plate 75, and the other end is pivotally connected to the middle part of the driving arm 73 for driving the lifting of the bucket 71. A micro displacement sensor 79 parallel to the lifting cylinder 74 and used for detecting the elongation of the lifting cylinder 74 is arranged on one side of the lifting cylinder 74. A support seat is arranged on the cross bar 78. The middle part of the tilting boom 77 is pivotally connected to the support seat. One end of the two ends of the tilting boom 77 is rotatably connected to the bucket 71 through the connecting rod 72, and the other end is rotatably connected to the fixing plate 75 through the tilting cylinder 76. A micro displacement sensor 79 parallel to the tilting cylinder 76 and used for detecting the elongation of the tilting cylinder 76 is arranged on one side of the tilting cylinder 76.

[0035] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For the relevant parts, reference can be made to the description of the method part.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A micro loader test bench, characterized in that, Comprising: a base (2), a trolley (3), a driving device (4), a suspension part (5) and a working part (7); Two parallel guide rails (21) are provided on the base (2). Sliders (22) for fixedly connecting with the trolley (3) are provided on both of the two guide rails (21). Two racks (23) are further provided on the base (2). The racks (23) are parallel to the guide rails (21) and are used for driving connection with the driving device (4). The driving device (4) is provided on the suspension part (5), and the suspension part (5) is provided on the trolley (3). Both ends of the driving device (4) pass through the side wall of the trolley (3) and gears (8) are provided at the ends. The gears (8) are meshed with the racks (23). The suspension part (5) and the working part (7) are connected through a sensing part (6). A plurality of first force sensors (10) are provided at the bottom end of the suspension part (5). A blanking plate (1) for the working part (7) to shovel is provided on the base (2); The driving device (4) includes a servo motor (41), a universal coupling (42) and a connecting rod (43). The servo motor (41) is arranged on the trolley (3). There are two universal couplings (42) and two connecting rods (43), and the two universal couplings (42) and the connecting rods (43) are symmetrically arranged on both sides of the servo motor (41). One end of the universal coupling (42) is connected with the servo motor (41), and the other end is connected with the connecting rod (43). The gear (8) is provided at the end of the connecting rod (43); The sensing part (6) includes a first support plate (61) and a second support plate (62). A plurality of second force sensors (20) are provided between the first support plate (61) and the second support plate (62). The first support plate (61) is connected with the suspension part (5), and the second support plate (62) is used for fixing the working part (7).

2. The experimental bench of a micro loader according to claim 1, characterized in that, The trolley (3) includes a frame (31), a motor frame (32) and a bearing seat (33). The motor frame (32) is located above the frame (31) and both ends tend towards the frame (31) and are fixed to the frame (31). The bearing seat (33) is located in the extending direction of the motor frame (32) and is fixedly connected with the frame (31). The frame (31) is fixedly connected with the slider (22). The motor frame (32) is used for fixing the servo motor (41), and the bearing seat (33) is used for driving the connecting rod (43).

3. The experimental bench of a micro loader according to claim 2, characterized in that, A wire rope displacement sensor (9) is further included. The wire rope displacement sensor (9) is fixed on the base (2) and close to one side of the trolley (3). The free end of the wire rope displacement sensor (9) is fixedly connected with the frame (31) and is used for measuring the forward displacement of the trolley (3).

4. A micro loader test bench according to claim 1, characterized in that, The working part (7) includes a bucket (71), a connecting rod (72), a driving arm (73), a lifting cylinder (74), a fixing plate (75), a tilting cylinder (76) and a tilting boom (77); The fixing plate (75) is fixedly connected to the second support plate (62). There are two driving arms (73). The two driving arms (73) are connected by a cross bar (78). The cross bar (78) is located in the middle of the driving arms (73). One end of each of the two driving arms (73) is pivotally connected to the fixing plate (75), and the other end of each is pivotally connected to the bucket (71). There are two lifting cylinders (74). The two lifting cylinders (74) correspond to the two driving arms (73) one by one. One end of the lifting cylinder (74) is pivotally connected to the fixing plate (75), and the other end of each is pivotally connected to the driving arm (73) for driving the lifting of the bucket (71). A support seat is provided on the cross bar (78). The middle part of the tilting boom (77) is pivotally connected to the support seat. One end of the tilting boom (77) is rotatably connected to the bucket (71) through the connecting rod (72), and the other end is rotatably connected to the fixing plate (75) through the tilting cylinder (76).

5. The experimental bench of a micro loader according to claim 4, characterized in that, On one side of each of the lifting cylinder (74) and the tilting cylinder (76), there is a micro displacement sensor (79) for detecting the elongation of the lifting cylinder (74) and the tilting cylinder (76).

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