Fatigue test device of guide wheel tensioning mechanism

Abstract

The utility model discloses a fatigue test device for a guide wheel tensioning mechanism, which relates to the technical field of test devices and comprises a base station, four support legs distributed in a rectangular manner are fixedly connected to positions, close to four corners, of the lower side of the base station, and an adjusting mechanism is rotatably connected to the bottom of the inner side of the base station. A testing mechanism is movably installed at the position, close to the right side, of the upper side of the base table, and two righting mechanisms which are symmetrically distributed front and back are slidably connected to the outer side of the adjusting mechanism. According to the fatigue test device of the guide wheel tensioning mechanism, the worm is rotated to enable the structure columns on the front side and the rear side to move in the opposite directions in the front-back direction, so that the distance between the two righting mechanisms is adjusted, and the righting mechanisms can be adjusted when the righting mechanisms face the guide wheel supports of the tensioning mechanisms of different specifications and sizes; and the problems that the straightening mechanism cannot be in direct contact with the guide wheel or the distance between the straightening mechanism and the guide wheel is too small, and the tensioning mechanism is difficult to place are solved.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and in particular to a fatigue testing device for a guide wheel tensioning mechanism. Background Technology

[0002] When a tracked excavator is traveling, it is affected by complex road conditions and tilts forward due to large digging forces. The front end of the track retracts under the force. In order to ensure that the excavator's track traveling device can work normally, maintain appropriate tension, reduce impact load and additional power consumption during travel, and ensure that the track will not break or derail due to impact during the vehicle's travel, each track is equipped with a tensioning device. The tensioning device has a great influence on the track traveling performance.

[0003] Chinese patent document CN208688785U discloses a fatigue testing device for a guide wheel tensioning mechanism. It includes a frame with two fixed seats (front and rear) on the frame. Two sets of guide rods (left and right) are positioned between the two fixed seats, and sliding seats are mounted on the guide rods. A hydraulic cylinder is mounted on the rear fixed seat, with its front end connected to the sliding seat. A guide wheel tensioning mechanism is located in front of the sliding seat. The guide wheel tensioning mechanism includes a cylinder body, a compression spring, and a spring seat. A guide wheel bracket is located behind the cylinder body, and a guide wheel is mounted on the bracket via a rotating shaft. A piston is inserted through the center of the cylinder body, and its rear end is connected to the guide wheel bracket. Two sets of support wheels (upper and lower) are located behind the sliding seat. This invention allows for simultaneous fatigue testing of the guide wheel and tensioning mechanism, which better simulates actual working conditions compared to testing individual components. The test results are more accurate, the testing process is simplified, and the testing efficiency is improved.

[0004] The existing technology has the following problems:

[0005] The spacing between the front and rear straightening mechanisms on the test device is kept constant due to the restriction of the guide rod. However, tracked excavators come in various shapes and sizes, resulting in different specifications of their tensioning mechanisms. This makes it difficult for the test device to ensure that the straightening plate can contact the guide wheel bracket when facing tensioning mechanisms of different specifications. Utility Model Content

[0006] This invention provides a fatigue testing device for a guide wheel tensioning mechanism to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A fatigue testing device for a guide wheel tensioning mechanism includes a base, four rectangularly distributed support legs fixedly connected to the lower side of the base near the four corners, an adjustment mechanism rotatably connected to the bottom inner side of the base, a bottom support plate fixedly connected to the upper side of the base near the left side, a testing mechanism movably installed on the upper side of the base near the right side, and two symmetrically distributed straightening mechanisms slidably connected to the outer side of the adjustment mechanism.

[0009] The adjusting mechanism includes a worm gear. The outer side of the worm gear is rotatably connected to a protrusion in the middle of the inner lower surface of the base. Two first screws are rotatably connected to the inner front and rear sides of the base, close to the left and right sides. A worm wheel is fixedly connected to the middle of the outer side of each of the two first screws. The lower side of the worm wheel is meshed with the upper side of the worm gear. Two structural columns are threadedly connected to the outer side of each of the two first screws. Two sliding rods are fixedly connected to the side of the two structural columns on the same side, close to each other. Four sliding rods are symmetrically distributed in the front and rear.

[0010] The straightening mechanism includes a slide table, the upper and lower sides of which are slidably connected to the outside of a slide rod. The upper and lower sides of the inner side of the slide table are rotatably connected to a second screw. A moving block is threadedly connected to the outer side of the second screw. A knob is fixedly connected to the upper end of the second screw.

[0011] Preferably, two symmetrically distributed stabilizing frames are fixedly connected to the front and rear sides of the base near the left and right sides, the upper side of the structural column is slidably connected to the inner side of the stabilizing frame, and the upper ends of the four structural columns are fixedly connected with first bolts.

[0012] Preferably, the inner sides of both movable blocks are movably sleeved with limit rods, the ends of the two limit rods that are close to each other are fixedly connected with clamping blocks, and the outer sides of the two limit rods are movably sleeved with springs, with the springs located on the side of the movable block closer to the clamping blocks.

[0013] Preferably, the clamping block is in the shape of an isosceles trapezoid.

[0014] Preferably, rubber pads are fixedly connected to the sides of the two clamping blocks that are close to each other.

[0015] Preferably, the two clamping blocks are fixedly connected to the side away from the bottom support plate with a second bolt.

[0016] Preferably, the outer side of the knob is provided with friction texture.

[0017] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0018] 1. This utility model provides a fatigue testing device for a guide wheel tensioning mechanism. It employs an adjustment mechanism, a worm gear, a first screw, a worm wheel, a structural column, a slide bar, a stabilizer, a first bolt, and a straightening mechanism. By rotating the worm gear, the structural columns on both the front and rear sides move in opposite directions, thereby adjusting the distance between the two straightening mechanisms. This allows the straightening mechanisms to adapt well to guide wheel supports of tensioning mechanisms of different sizes, avoiding the problem of the straightening mechanisms not being able to contact the guide wheels or the distance being too small, making it difficult to place the tensioning mechanism.

[0019] 2. This utility model provides a fatigue testing device for a guide wheel tensioning mechanism. It adopts a coordination mechanism, a slide table, a second screw, a moving block, a limiting rod, a clamping block, a spring, a second bolt, and a knob. By rotating the slide table, the two clamping blocks clamp the guide wheel bracket on the tensioning mechanism. The use of springs allows the clamping force on the guide wheel bracket to be controlled by adjusting the spring compression, avoiding the problem of damage between components due to over-adjustment caused by direct contact. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the adjustment mechanism of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the stabilizing frame part of this utility model;

[0024] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the straightening mechanism of this utility model.

[0025] In the diagram: 1. Base; 2. Support leg; 3. Adjustment mechanism; 31. Worm gear; 32. First screw; 33. Worm wheel; 34. Structural column; 35. Slide rod; 36. Stabilizer; 37. First bolt; 4. Base support plate; 5. Testing mechanism; 6. Straightening mechanism; 61. Slide table; 62. Second screw; 63. Moving block; 64. Limiting rod; 65. Clamping block; 66. Spring; 67. Second bolt; 68. Knob. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figures 1-5As shown, a fatigue testing device for a guide wheel tensioning mechanism includes a base 1. Four rectangular support feet 2 are fixedly connected to the lower side of the base 1 near the four corners. An adjustment mechanism 3 is rotatably connected to the bottom inner side of the base 1. A bottom support plate 4 is fixedly connected to the upper side of the base 1 near the left side. A testing mechanism 5 is movably installed on the upper side of the base 1 near the right side. Two straightening mechanisms 6 are symmetrically distributed front and back and slidably connected to the outer side of the adjustment mechanism 3.

[0028] The adjusting mechanism 3 includes a worm gear 31. The outer side of the worm gear 31 is rotatably connected to the protrusion in the middle of the lower inner surface of the base 1. Two first screws 32 are rotatably connected to the front and rear sides of the base 1 near the left and right sides. A worm wheel 33 is fixedly connected to the middle of the outer side of each of the two first screws 32. The lower side of the worm wheel 33 is meshed with the upper side of the worm gear 31. Two structural columns 34 are threadedly connected to the outer side of each of the two first screws 32. Two sliding rods 35 are fixedly connected to the side of the two structural columns 34 on the same side that are close to each other. Four sliding rods 35 are symmetrically distributed in the front and rear.

[0029] The straightening mechanism 6 includes a slide table 61, the upper and lower sides of which are slidably connected to the outside of the slide rod 35. The upper and lower sides of the inner side of the slide table 61 are rotatably connected to a second screw 62. The outer side of the second screw 62 is threadedly connected to a moving block 63. The upper end of the second screw 62 is fixedly connected to a knob 68.

[0030] It should be noted that the base plate 4 is equipped with pads for placing the spring seats of the tensioning mechanism. The structural components on the test mechanism 5 are consistent with the same type of structure in the reference case. Rotating the worm 31 causes the worm 31 to drive the worm wheel 33 to rotate. When the worm wheel 33 rotates, it drives the first screw 32 to rotate. When the first screw 32 rotates, it drives the structural column 34 to move. Since the first screw 32 is a bidirectional screw, the two structural columns 34 move synchronously in opposite directions. When the structural column 34 moves, it drives the slide bar 35 to move, thereby controlling the distance between the two straightening mechanisms 6. There is a self-locking effect between the worm 31 and the worm wheel 33, making the bottom of the structural column 34 more stable. Rotating the knob 68 causes the knob 68 to drive the second screw 62 to rotate. When the second screw 62 rotates, it drives the moving block 63 to move. Since the second screw 62 is a bidirectional screw, the two moving blocks 63 move synchronously in opposite directions.

[0031] like Figure 4 As shown, two symmetrically distributed stabilizing frames 36 are fixedly connected to the front and rear sides of the base 1 near the left and right sides. The upper side of the structural column 34 is slidably connected to the inner side of the stabilizing frame 36. The upper ends of the four structural columns 34 are all fixedly connected with the first bolt 37.

[0032] It should be noted that the stabilizer 36 is used to stabilize the upper side of the structural column 34, and the first bolt 37 is provided with a first wing nut, which can fix the upper end of the structural column 34, making the structural column 34 more stable when the device is running.

[0033] like Figure 5 As shown, the inner sides of the two movable blocks 63 are movably sleeved with limit rods 64, and the ends of the two limit rods 64 that are close to each other are fixedly connected with clamping blocks 65. The outer sides of the two limit rods 64 are movably sleeved with springs 66, and the springs 66 are located on the side of the movable block 63 that is close to the clamping blocks 65.

[0034] It should be noted that when the clamping block 65 clamps the guide wheel bracket on the tensioning mechanism, the knob 68 is rotated to compress the spring 66, so that the clamping force of the clamping block 65 on the guide wheel bracket can be controlled by adjusting the compression of the spring 66.

[0035] like Figure 5 As shown, the clamping block 65 is in the shape of an isosceles trapezoid.

[0036] It should be noted that the shape of the clamping block 65 allows the straightening mechanism 6 to slide directly left and right to ensure that the guide wheel bracket is placed between the clamping blocks 65.

[0037] like Figure 5 As shown, rubber pads are fixedly connected to the sides of the two clamping blocks 65 that are close to each other.

[0038] It should be noted that the rubber pad is used to increase the friction between the clamping block 65 and the guide wheel bracket to prevent the clamping block 65 from loosening.

[0039] like Figure 5 As shown, the two clamping blocks 65 are fixedly connected to the side away from the bottom support plate 4 by the second bolt 67.

[0040] It should be noted that the second bolt 67 is equipped with a second wing nut, which can fix the position of the clamping block 65 so that the tensioning mechanism will not shake due to the presence of the spring 66 during the test.

[0041] like Figure 5 As shown, the outer side of the knob 68 has a friction texture.

[0042] It should be noted that the friction texture is used to increase the friction between the hand and the knob 68, making it easier for the user to turn the knob 68.

[0043] The working principle of this utility model is as follows: First, rotating the worm gear 31 causes the worm wheel 33 to rotate. The rotation of the worm wheel 33 then drives the first screw 32 to rotate, which in turn moves the structural column 34. Since the first screw 32 is a bidirectional screw, the two structural columns 34 move synchronously in opposite directions. The movement of the structural column 34 moves the sliding rod 35, thereby controlling the distance between the two straightening mechanisms 6. The worm gear 31 and the worm wheel 33 have a self-locking effect, making the bottom of the structural column 34 more stable. By rotating the worm gear 31, the structural columns 34 on both sides move in opposite directions, thus adjusting the distance between the two straightening mechanisms 6. This allows the straightening mechanism 6 to adapt well to guide wheel supports of different sizes and specifications of tensioning mechanisms, preventing the straightening mechanism 6 from failing to contact the guide wheel directly. If the spacing is too small, making it difficult to place the tensioning mechanism, then, turn knob 68, causing knob 68 to drive the second screw 62 to rotate. When the second screw 62 rotates, it drives the moving block 63 to move. Since the second screw 62 is a bidirectional screw, the two moving blocks 63 move synchronously in opposite directions. When the clamping block 65 clamps the guide wheel bracket on the tensioning mechanism, continue to turn knob 68, causing the spring 66 to be compressed. This allows the clamping force of the clamping block 65 on the guide wheel bracket to be controlled by adjusting the compression of the spring 66. By rotating the slide table 61, the two clamping blocks 65 clamp the guide wheel bracket on the tensioning mechanism. The use of spring 66 allows the clamping force on the guide wheel bracket to be controlled by adjusting the compression of the spring 66, avoiding the problem of damage to components due to over-adjustment caused by direct contact.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fatigue testing device for a guide wheel tensioning mechanism, comprising a base (1), characterized in that: The base (1) has four rectangular support feet (2) fixedly connected to its lower side near the four corners. The base (1) has an adjustment mechanism (3) rotatably connected to its inner bottom. The base (1) has a bottom support plate (4) fixedly connected to its upper side near the left side. The base (1) has a testing mechanism (5) movably installed on its upper side near the right side. The adjustment mechanism (3) has two straightening mechanisms (6) symmetrically distributed in front and behind slidably connected to its outer side. The adjustment mechanism (3) includes a worm (31). The outer side of the worm (31) is rotatably connected to the protrusion in the middle of the inner lower surface of the base (1). Two first screws (32) are rotatably connected to the front and rear sides of the inner side of the base (1) near the left and right sides. A worm wheel (33) is fixedly connected to the middle of the outer side of each of the two first screws (32). The lower side of the worm wheel (33) is meshed with the upper side of the worm (31). Two structural columns (34) are threadedly connected to the outer side of each of the two first screws (32). Two slide rods (35) are fixedly connected to the side of the two structural columns (34) on the same side that are close to each other. Four slide rods (35) are symmetrically distributed in front and behind. The straightening mechanism (6) includes a slide (61), the upper and lower sides of which are slidably connected to the outside of the slide rod (35), the upper and lower sides of the inner side of the slide (61) are rotatably connected to a second screw (62), the outer side of the second screw (62) is threadedly connected to a moving block (63), and the upper end of the second screw (62) is fixedly connected to a knob (68).

2. The fatigue testing device for a guide wheel tensioning mechanism according to claim 1, characterized in that: Two symmetrically distributed stabilizing frames (36) are fixedly connected to the front and rear sides of the base (1) near the left and right sides. The upper side of the structural column (34) is slidably connected to the inner side of the stabilizing frame (36). The upper ends of the four structural columns (34) are all fixedly connected with first bolts (37).

3. The fatigue testing device for a guide wheel tensioning mechanism according to claim 1, characterized in that: The inner sides of the two movable blocks (63) are movably sleeved with limit rods (64), and the ends of the two limit rods (64) that are close to each other are fixedly connected with clamping blocks (65). The outer sides of the two limit rods (64) are movably sleeved with springs (66), and the springs (66) are located on the side of the movable block (63) close to the clamping blocks (65).

4. The fatigue testing device for a guide wheel tensioning mechanism according to claim 3, characterized in that: The clamping block (65) is in the shape of an isosceles trapezoid.

5. The fatigue testing device for a guide wheel tensioning mechanism according to claim 3, characterized in that: Rubber pads are fixedly connected to the sides of the two clamping blocks (65) that are close to each other.

6. The fatigue testing device for a guide wheel tensioning mechanism according to claim 3, characterized in that: The two clamping blocks (65) are fixedly connected to the side away from the bottom support plate (4) by a second bolt (67).

7. The fatigue testing device for a guide wheel tensioning mechanism according to claim 1, characterized in that: The outer side of the knob (68) is provided with friction texture.

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