Aviation dining car roller service life testing device

Abstract

The utility model relates to the field of roller testing, and discloses an aviation dining car roller service life testing device which is characterized in that a plurality of jolting strips which are linearly distributed are arranged above a base side by side, a movable car plate is arranged above the base in a left-right moving manner, and a group of rollers is mounted at each of four corners below the movable car plate through screws; a hanging rod is installed in the middle of the lower portion of the movable trolley plate through screws, a movable air cylinder is installed on the supporting seat on the right side, a push rod of the movable air cylinder is rotationally connected with the hanging rod, and through the movable trolley plate which is arranged above the base and moves left and right back and forth and a bumping strip which enables the movable trolley plate to vibrate, the movable trolley plate is completely supported by four rolling wheels; in addition, the four rollers are not provided with other supporting points, so that all weights on the movable trolley plate are borne by the four rollers, the movable trolley plate and the rollers are regarded as an aviation dining car, and the aviation dining car moves back and forth, so that movement of the aviation dining car in the normal use process is simulated, and whether the rollers meet requirements or not is judged.

Description

Technical Field

[0001] The utility model relates to the field of roller testing, in particular to a roller life testing device for an aviation dining car. Background Art

[0002] Airline catering carts are equipped with multiple sets of silent, universal rollers at the bottom. These rollers are typically made of rubber and feature dual brakes to ensure the cart's stability when needed. They also reduce noise during movement, creating a more comfortable environment. The rollers' constant contact with the ground during movement causes wear on their surfaces, and the heavy weight and vibrations of internal connectors also affect them. The rollers' lifespan is subject to certain standards, with the current standard for rollers requiring 4,500 reciprocating cycles under full load. To address this, we have designed a device to test the lifespan of airline catering cart rollers. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an aviation catering cart roller life testing device.

[0004] The utility model adopts the following technical solution to achieve the following: an aviation catering cart roller life test device, comprising a base, a plurality of linearly distributed bump bars are arranged side by side above the base, a movable vehicle plate is arranged above the base for left and right movement, a group of rollers are screwed to the four corners below the movable vehicle plate, the rollers are in rolling contact with the upper surface of the base, and a hanging rod is screwed to the middle of the movable vehicle plate;

[0005] Two sets of support seats are symmetrically arranged above the base, and a movable cylinder is installed on the right support seat. The push rod of the movable cylinder passes through the right support seat and is placed on the left end thereof. The push rod of the movable cylinder is rotatably connected to the hanging rod;

[0006] Two groups of movable tracks are symmetrically arranged between the two groups of support seats. Four groups of guide members distributed in a rectangular structure are arranged below the movable vehicle plate. The guide members are in rolling contact with the movable tracks.

[0007] As a further improvement of the above-mentioned scheme, the guide member includes a mounting rod fixed to the bottom of the movable vehicle plate by screws, and a threaded section is provided on the mounting rod, and two sets of nuts are threadedly connected to the threaded section, and a guide wheel is sleeved between the two sets of nuts. The outer ring of the guide wheel is in rolling contact with the side of the corresponding movable track, which can guide and limit the left and right movement of the movable vehicle plate so that its position will not be offset, thereby facilitating the left and right reciprocating movement of the movable vehicle plate.

[0008] As a further improvement of the above solution, the bottom end of the mounting rod is located 3-5 cm above the bump bar, and the distance between the upper surface of the guide wheel and the upper surface of the movable track is greater than the thickness of the bump bar. When the roller passes through the bump bar, it will shake up and down, and the guide wheel will not lose contact with the movable track, which is convenient for guiding it and moving along the specified path.

[0009] As a further improvement of the above scheme, a compensation rod is screwed on the push rod of the moving cylinder, and the compensation rod is rotatably connected to a straight rod at one end of the push rod away from the moving cylinder through an axle pin, and a connecting piece is provided at the other end of the straight rod, and a circular hole is formed through the upper and lower parts of the connecting piece. The hanging rod is sleeved in the circular hole and the two are connected by screws. The hanging rod is directly inserted into the circular hole of the connecting piece and screwed, so it can be quickly fixed. The compensation rod is rotatably connected to the straight rod, so that when the moving vehicle plate shakes up and down when passing through the bump bar, the straight rod can deflect accordingly, avoiding damage to the hanging rod or the moving cylinder push rod caused by vibration and tearing at the connection.

[0010] As a further improvement of the above solution, the lower surface of the movable vehicle plate does not contact the upper surface of the movable guide rail, and the movable vehicle plate is completely supported by four rollers, and has no other support points, so that all the weight of the movable vehicle plate is borne by the four rollers, which makes it easier to detect its actual strength under full load.

[0011] As a further improvement of the above solution, the length of the base is greater than the maximum stroke of the moving cylinder, and the length of the compensation rod is greater than half the length of the moving vehicle plate. When the moving cylinder is fully retracted, there is a 3-5cm distance between the right end of the moving vehicle plate and the right support seat, which prevents the collision of the moving vehicle plate and the support seat caused by a failure of the moving cylinder, thereby improving safety.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This utility model has a movable platform that moves back and forth above the base, and a bump bar that causes it to vibrate. The movable platform is completely supported by four rollers, with no other support points. This allows the entire weight of the movable platform to be borne entirely by the four rollers. The movable platform and rollers are treated as an airline catering cart, and their back-and-forth movement simulates their normal use. By continuously moving them to the required standard number of times, the rollers can be judged to determine whether they meet the requirements.

[0014] 2. By arranging two sets of moving tracks on the device and multiple guide members under the moving vehicle plate, the guide members are in rolling contact with the moving tracks, thereby guiding the left and right movement of the moving vehicle plate, so that it moves along the specified path without position deviation;

[0015] 3. The push rod of the moving cylinder is rotatably connected to the straight rod through the compensation rod, so that when the moving vehicle plate shakes up and down when passing through the bump strip, the straight rod can deflect accordingly, avoiding damage to the connecting rod or the moving cylinder push rod caused by vibration and tearing at the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the roller life test device for airline catering carts provided by the utility model;

[0017] Figure 2 for Figure 1 Front view of

[0018] Figure 3 for Figure 1 Schematic diagram of the bottom of the moving vehicle plate;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure of the middle connecting piece, straight rod and compensation rod.

[0020] Description of main symbols:

[0021] 1. Base; 2. Bump bar; 3. Moving plate; 4. Roller; 5. Moving track; 6. Moving cylinder; 7. Guide; 71. Mounting rod; 72. Guide wheel; 73. Nut; 8. Hooking rod; 81. Connecting piece; 82. Straight rod; 83. Compensating rod. DETAILED DESCRIPTION

[0022] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example:

[0024] Please combine Figure 1-Figure 4 The roller life test device for an airline catering cart of this embodiment includes a base 1, with a plurality of linearly distributed bump bars 2 arranged side by side above the base 1. A movable plate 3 is arranged above the base 1 for left and right movement. A group of rollers 4 are screwed to the four corners below the movable plate 3. The rollers 4 are in rolling contact with the upper surface of the base 1. A connecting rod 8 is screwed to the middle of the movable plate 3.

[0025] Two sets of support seats are symmetrically arranged above the base 1. A mobile cylinder 6 is installed on the right support seat. The push rod of the mobile cylinder 6 passes through the right support seat and is placed on its left end. The push rod of the mobile cylinder 6 is rotatably connected to the hanging rod 8.

[0026] Two groups of moving rails 5 are symmetrically arranged between the two groups of support seats. Four groups of guide members 7 distributed in a rectangular structure are arranged below the moving vehicle plate 3. The guide members 7 are in rolling contact with the moving rails 5.

[0027] The guide member 7 includes a mounting rod 71 fixed to the bottom of the movable vehicle plate 3 by screws, and a threaded section is provided on the mounting rod 71, and two sets of nuts 73 are threadedly connected to the threaded section. A guide wheel 72 is sleeved between the two sets of nuts 73, and the outer ring of the guide wheel 72 is in rolling contact with the side of the corresponding movable track 5, which can guide and limit the left and right movement of the movable vehicle plate 3 so that its position will not be offset, thereby facilitating the left and right reciprocating movement of the movable vehicle plate 3.

[0028] The bottom end of the mounting rod 71 is 3-5 cm above the bumping bar 2, and the distance between the upper surface of the guide wheel 72 and the upper surface of the movable track 5 is greater than the thickness of the bumping bar 2. When the roller 4 passes through the bumping bar 2, it will shake up and down, and the guide wheel 72 will not lose contact with the movable track 5, making it easier to guide it and move it along the specified path.

[0029] The compensating rod 83 is screwed to the push rod of the moving cylinder 6. The compensating rod 83 is rotatably connected to the straight rod 82 at one end of the push rod away from the moving cylinder 6 through an axle pin. The other end of the straight rod 82 is provided with a connecting piece 81. The connecting piece 81 passes through the upper and lower parts to form a round hole. The hanging rod 8 is sleeved in the round hole and the two are connected by screws. The hanging rod 8 is directly inserted into the round hole of the connecting piece 81 and screwed, which can be quickly fixed. The compensating rod 83 is rotatably connected to the straight rod 82, so that when the moving vehicle plate 3 shakes up and down after passing through the bump bar 2, the straight rod 82 can deflect accordingly, avoiding damage to the hanging rod 8 or the push rod of the moving cylinder 6 caused by vibration and tearing at the connection.

[0030] The lower surface of the moving vehicle plate 3 does not contact the upper surface of the moving guide rail. The moving vehicle plate 3 is completely supported by the four rollers 4 and has no other support points. Therefore, all the weight on the moving vehicle plate 3 is borne by the four rollers 4, which makes it easy to detect its actual strength under full load.

[0031] The length of the base 1 is greater than the maximum stroke of the mobile cylinder 6, and the length of the compensation rod 83 is greater than half the length of the mobile vehicle plate 3. When the mobile cylinder 6 is fully retracted, there is a 3-5 cm distance between the right end of the mobile vehicle plate 3 and the right support seat. The rightmost end of the compensation rod 83 is outside the right side of the base 1, which is convenient for the connection between the compensation rod 83 and the push rod of the mobile cylinder 6, and can prevent the collision of the mobile vehicle plate 3 and the support seat caused by a failure of the mobile cylinder 6, thereby improving safety.

[0032] The operating principle of the roller life test device for airline catering carts in the embodiment of the present application is as follows: in actual use, the roller 4 to be tested is mounted below the movable platform 3 by screws. The movable platform 3 is then placed on the base 1, and the four guide members 7 are respectively in rolling contact with the side surfaces of the two corresponding sets of movable rails 5. The compensation rod 83 is then connected to the push rod of the movable cylinder 6 by screws. A heavy object is then placed on the movable platform 3 to ensure that it reaches the weight required for testing the fully loaded airline catering cart.

[0033] Since the lower surface of the moving vehicle plate 3 does not contact the upper surface of the moving rail 5, and the four guide members 7 are in rolling contact with the side surfaces of the corresponding two groups of moving rails 5, the moving vehicle plate 3 is completely supported by the four rollers 4, and there is no other support point. Therefore, all the weight on the moving vehicle plate 3 is borne by the four rollers 4. Then, the power supply of the moving cylinder 6 is turned on to make it move back and forth at a certain speed. During the movement, it continuously passes through multiple bump bars 2, thereby modeling the state of an airline dining car passing through some bumps. After the required standard number of reciprocating movements, the roller 4 is removed and the degree of surface wear and whether the internal support structure is damaged are checked to determine whether the roller 4 meets the requirements.

[0034] A movable platform 3 is installed above the base 1, which moves back and forth, and a bump bar 2 is installed to make it vibrate. The movable platform 3 is completely supported by four rollers 4, with no other support points. Therefore, all the weight on the movable platform 3 is borne by the four rollers 4. The movable platform 3 and rollers 4 are regarded as an airline catering car and are moved back and forth to simulate the movement during normal use. By continuously moving it to the required standard number of times, it can be judged whether the rollers 4 meet the requirements.

[0035] By providing two sets of movable rails 5 on the device, and multiple guide members 7 are provided under the movable vehicle plate 3, the guide members 7 are in rolling contact with the movable rails 5, thereby being able to guide the left and right movement of the movable vehicle plate 3, so that it moves along the specified path without position deviation;

[0036] The push rod of the moving cylinder 6 is rotatably connected to the straight rod 82 through the compensation rod 83, so that when the moving vehicle plate 3 shakes up and down when passing through the bump strip 2, the straight rod 82 can deflect accordingly, avoiding damage to the hanging rod 8 or the push rod of the moving cylinder 6 caused by vibration and tearing at the connection.

[0037] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. Airline catering cart roller life test device, characterized by: The invention comprises a base (1), a plurality of linearly distributed bump bars (2) are arranged in parallel above the base (1), a movable vehicle plate (3) is arranged above the base (1) for left and right movement, a group of rollers (4) are screwed at the four corners below the movable vehicle plate (3), the rollers (4) are in rolling contact with the upper surface of the base (1), and a connecting rod (8) is screwed in the middle below the movable vehicle plate (3); Two groups of support seats are symmetrically arranged on the left and right sides of the base (1), and a movable cylinder (6) is installed on the right support seat. The push rod of the movable cylinder (6) passes through the right support seat and is placed on the left end thereof. The push rod of the movable cylinder (6) is rotatably connected to the hanging rod (8); Two groups of movable rails (5) are symmetrically arranged between the two groups of support seats, and four groups of guide members (7) distributed in a rectangular structure are arranged below the movable vehicle plate (3). The guide members (7) are in rolling contact with the movable rails (5).

2. The aircraft catering cart roller life test device according to claim 1, characterized in that: The guide member (7) comprises a mounting rod (71) fixed to the bottom of the moving vehicle plate (3) by screws, the mounting rod (71) is provided with a threaded section, two groups of nuts (73) are threadedly connected to the threaded section, a guide wheel (72) is sleeved between the two groups of nuts (73), and the outer ring of the guide wheel (72) is in rolling contact with the side of the corresponding moving track (5).

3. The apparatus for testing the life of the rollers of an airline catering cart according to claim 2, wherein: The bottom end of the mounting rod (71) is located 3-5 cm above the bumping strip (2), and the distance between the upper surface of the guide wheel (72) and the upper surface of the moving track (5) is greater than the thickness of the bumping strip (2).

4. The apparatus for testing the life of an airline catering cart roller according to claim 1, wherein: A compensating rod (83) is screwed onto the push rod of the movable cylinder (6); one end of the compensating rod (83) away from the push rod of the movable cylinder (6) is rotatably connected to a straight rod (82) via an axle pin; the other end of the straight rod (82) is provided with a connecting piece (81); the connecting piece (81) is passed through from top to bottom to form a circular hole; the hanging rod (8) is sleeved in the circular hole and the two are connected by screws.

5. The apparatus for testing the life of an airline catering cart roller according to claim 1, wherein: The lower surface of the movable vehicle plate (3) does not contact the upper surface of the movable guide rail.

6. The aircraft catering cart roller life test device according to claim 1, characterized in that: The length of the base (1) is greater than the maximum stroke of the moving cylinder (6), the length of the compensation rod (83) is greater than half the length of the moving vehicle plate (3), and when the moving cylinder (6) is fully retracted, there is a 3-5 cm gap between the right end of the moving vehicle plate (3) and the right support seat.

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