Transmission shaft protective cover of test bed

Abstract

The utility model discloses a transmission shaft protective cover of a test bench, which belongs to the field of transmission shaft protective equipment and comprises a support frame, two bottom plates and two telescopic half cylinders. The supporting frame comprises a transverse support and vertical supports connected to the left side and the right side of the transverse support at the same time. The bottom plate is perpendicular to the horizontal plane and is provided with a semicircular hole; the two bottom plates are hinged to the two vertical supports respectively and are in mirror symmetry. The two bottom plates are relatively closed or separated through rotation, and when the two bottom plates are closed, the two semicircular holes define a circular through hole; the two telescopic half cylinders are symmetrically arranged, are fixedly arranged at the front ends of the two bottom plates respectively and can stretch out and draw back in the front-back direction; when the two bottom plates are relatively closed, the two telescopic half cylinders are encircled to form a circular sleeve structure; the device further comprises a locking assembly. The locking assembly is used for locking or unlocking the two telescopic half cylinders in the surrounding state. According to the utility model, the dismounting time can be greatly shortened, the length of various transmission shafts can be flexibly matched, and the universality is strong.

Description

Technical Field

[0001] This utility model belongs to the field of transmission shaft protection equipment, specifically relating to a transmission shaft protective cover for a test bench. Background Technology

[0002] In the research and development of transmission equipment, performance testing is a crucial step in ensuring the reliability of the equipment. By simulating different working conditions, the drive shaft is tested on a test bench for various aspects such as load and speed to evaluate its strength, durability, and stability. This provides reference data for the design optimization and quality control of the transmission equipment.

[0003] To prevent safety accidents caused by drive shaft breakage or flying parts during testing, protective measures are often required around transmission equipment to ensure testing safety. Currently, fixed protective covers are generally used to cover the drive shaft for protection. However, due to the large variety of products tested daily on the test bench, and the different testing requirements of different products, fixed protective covers need to be frequently disassembled to accommodate shaft installation, which is cumbersome and leads to low testing efficiency.

[0004] Currently, a protective cover for test benches has been designed to address the inconvenience of disassembly and assembly. This cover is divided into multiple parts to facilitate handling and disassembly, reducing difficulty and improving efficiency. However, in actual testing scenarios, the requirements for protective covers go beyond efficient disassembly and assembly. Firstly, the various drive shafts tested on the test bench vary in length, and current protective covers are not extendable, making it difficult to flexibly match the protection requirements of different drive shafts. Furthermore, after testing each drive shaft, each part still needs to be disassembled before installing the next drive shaft, resulting in extremely limited improvement in testing efficiency and failing to meet the demands of high-frequency testing. Therefore, there is an urgent need for a drive shaft protective cover that can solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a drive shaft protective cover for a test bench, addressing the aforementioned shortcomings and solving the problems of low disassembly and assembly efficiency and inability to flexibly match various drive shaft lengths. To achieve the above objective, this utility model provides the following technical solution:

[0006] A drive shaft protective cover for a test bench includes a support frame, two base plates, and two telescopic semi-cylinders. The support frame includes a horizontal support and vertical supports connected to both sides of the horizontal support. The base plates are perpendicular to the horizontal plane and have semi-circular holes. The two base plates are respectively hinged to the two vertical supports and are mirror-symmetrical. The two base plates can be rotated to close or move away from each other, and when closed, the two semi-circular holes enclose each other to form a circular through hole. The two telescopic semi-cylinders are symmetrically arranged and fixed to the front ends of the two base plates, and both can extend and retract in the front-back direction. When the two base plates are closed relative to each other, the two telescopic semi-cylinders enclose each other to form a circular sleeve structure. The system also includes a locking assembly for locking or unlocking the two telescopic semi-cylinders in the closed state.

[0007] Furthermore, the telescopic semi-cylinder includes a first protective part and a second protective part slidably connected to the inner side of the first protective part; the first protective part includes a first protective plate and a first support assembly disposed on the inner side of the first protective plate; the second protective part includes a second protective plate and a second support assembly disposed on the inner side of the second protective plate; the first protective plate and the second protective plate are coaxially arranged and are both semi-circular plates protruding to the same side; the inner diameter of the first protective plate is larger than the outer diameter of the second protective plate.

[0008] Furthermore, the first protective plate has a first baffle perpendicular to the first protective plate at its front end, and its rear end is fixedly connected to the front wall of the corresponding base plate; the second protective plate has a fixed plate and a sliding limiting plate at its front and rear ends respectively; the first baffle, the fixed plate and the sliding limiting plate are parallel and are all semi-circular plates; the inner diameter of the first baffle is larger than the outer diameter of the second protective plate; the outer diameter of the sliding limiting plate is larger than the inner diameter of the first baffle, and is used to limit the maximum extension distance of the second protective part when it moves forward by contacting and limiting it with the first baffle.

[0009] Furthermore, the first support component is vertically connected between the first baffle and the base plate correspondingly disposed on the first baffle; the first support component includes a plurality of first optical axes and a plurality of first reinforcing ribs; the plurality of first optical axes and the plurality of first reinforcing ribs are alternately arranged and evenly distributed along the semi-circular contour of the first baffle.

[0010] Furthermore, the second support assembly is vertically connected between the fixed plate and the sliding limiting plate; the second support assembly includes several second optical axes and several second reinforcing ribs; the several second optical axes and several second reinforcing ribs are alternately arranged and evenly distributed along the semi-circular contour of the fixed plate.

[0011] Furthermore, it also includes a semi-circular sliding reinforcing plate; the sliding reinforcing plate is arranged parallel to the rear side of the sliding limiting plate; the sliding reinforcing plate and the sliding limiting plate are slidably supported between the first baffle and the base plate corresponding to the first baffle through several first optical axes; both the sliding reinforcing plate and the sliding limiting plate are provided with several guide grooves; the guide grooves on the sliding reinforcing plate and the sliding limiting plate correspond one-to-one and are used to cooperate with the first reinforcing rib to achieve guidance; it also includes several third optical axes; the third optical axes are vertically connected between the rear wall of the sliding limiting plate and the front wall of the sliding reinforcing plate.

[0012] Furthermore, it also includes two hinge units; the two hinge units are symmetrically arranged on the front walls of the two vertical supports; each hinge unit includes several hinge components arranged at intervals; each base plate is vertically hinged to the front wall of the corresponding vertical support through a hinge unit, so that the base plate can move circumferentially towards or away from the front wall of the vertical support along the vertical hinge rotation axis; the two base plates achieve relative closure or separation by rotating synchronously in opposite directions.

[0013] Furthermore, the hinge assembly includes a hinge fixing piece, a hinge rotating piece, and a hinge pin; the hinge fixing piece is fixed to the front wall of the corresponding vertical support, and the hinge rotating piece is hinged to the hinge fixing piece through the hinge pin; the hinge rotating piece is used to be fixed to the corresponding base plate; the base plate rotates relative to the vertical support at an angle of 0°-90°.

[0014] Furthermore, the locking assembly includes a latch and a retainer; the latch is movably disposed on the front wall of the sliding limit plate of one telescopic half-cylinder, and the retainer is disposed on the front wall of the sliding limit plate of the other telescopic half-cylinder; the latch is used to cooperate with the retainer to lock or unlock the two sliding limit plates.

[0015] Furthermore, both the first and second protective plates are provided with a plurality of through holes arranged in an array; a fixing member is also included; the fixing member is used to simultaneously pass through the aligned through holes on the first and second protective plates to fix the relative position between the second and first protective plates.

[0016] The beneficial effects of this utility model are:

[0017] 1. During testing, the protective cover of this utility model does not require complete disassembly. Simply opening or closing the two telescopic semi-cylinders when installing or removing the drive shaft allows for simple and quick assembly and disassembly of the drive shaft, significantly reducing assembly and disassembly time and greatly improving testing efficiency. Furthermore, the circular sleeve formed by the two telescopic semi-cylinders can extend and retract according to the length of the drive shaft under test, flexibly adapting to different drive shaft lengths. While providing protection, this greatly enhances the versatility of the protective cover. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the two base plates in the closed state of this utility model. Figure 1 ;

[0019] Figure 2 This is a three-dimensional structural diagram of the two base plates in the closed state of this utility model. Figure 2 ;

[0020] Figure 3 yes Figure 2 Enlarged schematic diagram of section A in the middle structure;

[0021] Figure 4 This is a three-dimensional structural diagram of the two base plates in the closed state of this utility model. Figure 3 The first and second protective plates are not shown.

[0022] Figure 5 This is a structural diagram of the two base plates in the open state of this utility model;

[0023] Figure 6 yes Figure 5 Enlarged schematic diagram of section B in the middle structure;

[0024] Figure 7 yes Figure 5 Enlarged schematic diagram of the middle structure at point C;

[0025] In the attached diagram: 1. Support frame; 2. Base plate; 3. Telescopic semi-cylinder; 4. Locking assembly; 5. First support assembly; 6. Second support assembly; 7. Guide groove; 8. Third optical axis; 9. Hinge assembly; 10. Through hole; 11. Horizontal bracket; 12. Vertical bracket; 21. Semi-circular hole; 31. First protective plate; 32. Second protective plate; 33. First baffle; 34. Fixing plate; 35. Sliding limit plate; 36. Sliding reinforcing plate; 41. Lock; 42. Card seat; 51. First optical axis; 52. First reinforcing rib; 61. Second optical axis; 62. Second reinforcing rib; 91. Hinge fixing piece; 92. Hinge rotating piece; 93. Hinge pin. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0028] In the description of this utility model, "multiple" means two or more.

[0029] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0030] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0033] Example 1:

[0034] See attached Figures 1-4。A drive shaft protective cover for a test bench, comprising a support frame 1, two bottom plates 2 and two telescopic half cylinders 3; the support frame 1 includes a horizontal support 11 and vertical supports 12 connected to the left and right sides of the horizontal support 11 at the same time; the bottom plates 2 are perpendicular to the horizontal plane and have semi-circular holes 21; the two bottom plates 2 are respectively hinged on the two vertical supports 12 and are mirror-symmetrical; the two bottom plates 2 are relatively closed or separated by rotation, and when closed, the two semi-circular holes 21 enclose a circular through hole 10; the two telescopic half cylinders 3 are symmetrically arranged, respectively fixed at the front ends of the two bottom plates 2, and can be telescoped in the front-back direction; when the two bottom plates 2 are relatively closed, the two telescopic half cylinders 3 enclose a circular sleeve structure; further comprising a locking component 4; the locking component 4 is used to lock or unlock the two telescopic half cylinders 3 in the enclosed state. From the above structure, it can be seen that the support frame 1 serves as the installation base for the bottom plates 2, including the horizontal support 11 and the vertical supports 12 connected to the left and right sides of the horizontal support 11 at the same time, that is, the support frame 1 is a "冂"-shaped support frame. Among them, the vertical support 12 can be designed to be detachably connected or fixedly connected to the ground to ensure the fixed installation position of the support frame 1, and there is a space between the two vertical supports 12 for the drive shaft to be tested to pass through. The bottom plates 2 serve as the installation base for the telescopic half cylinders 3 and are arranged perpendicular to the horizontal plane. The two bottom plates 2 are respectively hinged on the two vertical supports 12 and are mirror-symmetrical. The bottom plates 2 are provided with semi-circular holes 21. When the two bottom plates 2 are relatively closed by rotation, the two semi-circular holes 21 enclose a circular through hole 10 for the drive shaft to be tested to pass through. The two telescopic half cylinders 3 are symmetrically arranged and are respectively fixed at the front ends of the two bottom plates 2. When installing the drive shaft to be tested, the two bottom plates 2 can be first in a relatively separated state, and the drive shaft is passed through the support frame 1 into the installation position to be installed, and then the two bottom plates 2 are relatively closed by rotation. At this time, the circular through hole 10 formed by the closure of the two bottom plates 2 will not hinder the installation of the drive shaft to be tested. The two telescopic half cylinders 3 enclose a circular sleeve structure and cover the outer peripheral wall of the drive shaft for protection. At this time, the two telescopic half cylinders 3 in the enclosed state are locked by the locking component 4, and then the two telescopic half cylinders 3 of the circular sleeve structure are synchronously telescoped in the front-back direction to match the length of the current drive shaft, and the installation of the drive shaft can be simply and quickly completed. The disassembly is the same in principle. First, let the locking component 4 unlock the two telescopic half cylinders 3, and then rotate the two bottom plates 2 to a relatively separated state. The utility model can greatly reduce the disassembly and assembly time, greatly improve the test efficiency, and at the same time can flexibly match the length of the drive shaft, and can be applicable to the test scenarios of various drive shafts with different lengths, with strong versatility.

[0035] Embodiment 2:

[0036] See appendix Figures 1-7Based on Embodiment 1, the telescopic semi-cylinder 3 includes a first protective part and a second protective part slidably connected to the inner side of the first protective part; the first protective part includes a first protective plate 31 and a first support component 5 disposed inside the first protective plate 31; the second protective part includes a second protective plate 32 and a second support component 6 disposed inside the second protective plate 32; the first protective plate 31 and the second protective plate 32 are coaxially arranged and are both semi-circular plates protruding to the same side; the inner diameter of the first protective plate 31 is larger than the outer diameter of the second protective plate 32. From the above structure, it can be seen that the telescopic semi-cylinder 3 includes a first protective part and a second protective part. The position of the first protective part is fixed, and the second protective part is disposed inside the first protective part and can extend and retract relative to the first protective part in the front-back direction to flexibly match the actual length of the transmission shaft to be measured. The first protective plate 31 and the second protective plate 32 are coaxially arranged and are both semi-circular plates protruding to the same side. The inner diameter of the first protective plate 31 is greater than or equal to the outer diameter of the second protective plate 32, ensuring that the second protective part can extend and retract smoothly relative to the first protective part without interference.

[0037] The first protective plate 31 has a first baffle 33 perpendicular to its front end and a rear end fixedly connected to the front wall of the corresponding base plate 2. The second protective plate 32 has a fixed plate 34 and a sliding limiting plate 35 at its front and rear ends, respectively. The first baffle 33, fixed plate 34, and sliding limiting plate 35 are parallel and are all semi-circular plates. The inner diameter of the first baffle 33 is larger than the outer diameter of the second protective plate 32. The outer diameter of the sliding limiting plate 35 is larger than the inner diameter of the first baffle 33, and is used to limit the maximum extension distance of the second protective part when it moves forward by contacting and limiting the first baffle 33. From the above structure, it can be seen that the rear end of the first protective plate 31 is fixedly connected to the front wall of the corresponding base plate 2 for support, and the front end of the first protective plate 31 has a first baffle 33 perpendicular to the first protective plate 31 and extending inward along the radial direction of the central axis of the first protective plate 31. The inner diameter of the first baffle 33 is larger than the outer diameter of the second protective plate 32, so it will not interfere with the extension and retraction of the second protective part. The second protective plate 32 has a fixed plate 34 and a sliding limiting plate 35 at its front and rear ends, respectively, which are perpendicular to the second protective plate 32. Both the fixed plate 34 and the sliding limiting plate 35 extend inward along the radial direction of the central axis of the second protective plate 32. When the second protective part extends forward relative to the first protective part, the sliding limiting plate 35 also slides forward. Since the outer diameter of the sliding limiting plate 35 is larger than the inner diameter of the first baffle 33, when the front wall of the sliding limiting plate 35 contacts and abuts against the rear wall of the first baffle 33, it will prevent the second protective part from continuing to move forward, thereby limiting the maximum extension distance of the second protective part when it slides forward.

[0038] The first support assembly 5 is vertically connected between the first baffle 33 and the corresponding base plate 2. The first support assembly 5 includes several first optical axes 51 and several first reinforcing ribs 52. These first optical axes 51 and first reinforcing ribs 52 are alternately arranged and evenly distributed along the semi-circular contour of the first baffle 33. As can be seen from the above structure, the first support assembly 5 provides support for the first protective plate 31 and the first baffle 33. Specifically, there are five first optical axes 51 and four first reinforcing ribs 52.

[0039] The second support assembly 6 is vertically connected between the fixed plate 34 and the sliding limiting plate 35. The second support assembly 6 includes several second optical axes 61 and several second reinforcing ribs 62. These second optical axes 61 and second reinforcing ribs 62 are alternately arranged and evenly distributed along the semi-circular contour of the fixed plate 34. As can be seen from the above structure, the second support assembly 6 provides support for the second protective plate 32, the fixed plate 34, and the sliding limiting plate 35. The second support assembly 6 includes several second optical axes 61 and several second reinforcing ribs 62, which are alternately arranged and evenly distributed along the semi-circular contour of the fixed plate 34, ensuring effective support for the second protective part. Specifically, there are five second optical axes 61 and four second reinforcing ribs 62, and the diameter of the second optical axes 61 is smaller than that of the first optical axis 51.

[0040] It also includes a semi-circular sliding reinforcing plate 36; the sliding reinforcing plate 36 is arranged parallel to the rear side of the sliding limiting plate 35; the sliding reinforcing plate 36 and the sliding limiting plate 35 are slidably supported between the first baffle 33 and the base plate 2 corresponding to the first baffle 33 through several first optical axes 51; both the sliding reinforcing plate 36 and the sliding limiting plate 35 are provided with several guide grooves 7; the guide grooves 7 on the sliding reinforcing plate 36 and the sliding limiting plate 35 correspond one-to-one and are used to cooperate with the first reinforcing rib 52 to achieve guidance; it also includes several third optical axes 8; the third optical axes 8 are vertically connected between the rear wall of the sliding limiting plate 35 and the front wall of the sliding reinforcing plate 36. From the above structure, it can be seen that the sliding reinforcing plate 36 is used to strengthen the guidance and support of the second protective part. Specifically, both the sliding reinforcing plate 36 and the sliding limiting plate 35 can have several first through holes with corresponding positions. These first through holes allow the first optical axes 51 to pass through, enabling both the sliding reinforcing plate 36 and the sliding limiting plate 35 to be simultaneously pierced by several first optical axes 51, allowing them to reciprocate along the length of the first optical axes 51. Furthermore, both the sliding reinforcing plate 36 and the sliding limiting plate 35 have several guide grooves 7, with each groove corresponding to the one on the sliding reinforcing plate 36. The shape of the guide groove 7 matches the outer contour of the first reinforcing rib 52, allowing the first reinforcing rib 52 to pass through and guide the sliding reinforcing plate 36 or the sliding limiting plate 35. Based on the guidance provided by the first optical axes 51, the guide grooves 7 are designed to further enhance the guiding effect. The third optical axis 8 is vertically connected between the rear wall of the sliding limiting plate 35 and the front wall of the sliding reinforcing plate 36, and is used to enable the rear wall of the sliding limiting plate 35 and the sliding reinforcing plate 36 to move synchronously. In addition, since the sliding reinforcing plate 36 is arranged parallel to the rear side of the sliding limiting plate 35, when the second protective part retracts relative to the first protective part, the rear wall of the sliding reinforcing plate 36 will abut against the corresponding front wall of the base plate 2 to limit the maximum retraction distance of the second protective part.

[0041] Preferably, the device further includes a plurality of linear bearings, which are fixed to the rear walls of the sliding reinforcing plate 36 and the sliding limiting plate 35 and are used to fit onto the outer peripheral wall of the first optical shaft 51 to enhance the stability of the second protective part during sliding. This technology is prior art, so it will not be described in detail in this utility model.

[0042] Example 3:

[0043] See attached Figures 1-7Based on Embodiment 2, it further includes two hinge units; the two hinge units are symmetrically arranged on the front walls of the two vertical supports 12; each hinge unit includes several spaced-apart hinge components 9; each base plate 2 is vertically hinged to the front wall of the corresponding vertical support 12 through a hinge unit, so that the base plate 2 can move circumferentially towards or away from the front wall of the vertical support 12 along the vertical hinge rotation axis; the two base plates 2 achieve relative closure or separation by rotating synchronously in opposite directions. From the above structure, it can be seen that the hinge unit can rotate relative to the vertical support 12, thereby driving the base plate 2 hinged to the hinge unit to move circumferentially along the vertical hinge rotation axis, thus moving towards or away from the front wall of the vertical support 12. Since the two hinge units are symmetrically arranged on the front walls of the two vertical supports 12, the hinge components on the two vertical supports 12 rotate in opposite directions. The two base plates 2 can be simultaneously rotated in opposite directions to close relative to each other, thereby enclosing the two telescopic semi-cylinders 3 into a circular sleeve structure to protect the drive shaft. Alternatively, the two base plates 2 can be moved away from each other, separating the two telescopic semi-cylinders 3 and facilitating quick disassembly of the drive shaft. Specifically, each hinge unit includes three hinge assemblies 9, which are equally spaced to improve the stability of the hinge connection to the base plates 2.

[0044] The hinge assembly 9 includes a hinge fixing piece 91, a hinge rotating piece 92, and a hinge pin 93. The hinge fixing piece 91 is fixed to the front wall of the corresponding vertical support 12, and the hinge rotating piece 92 is hinged to the hinge fixing piece 91 via the vertically arranged hinge pin 93. The hinge rotating piece 92 is used to fix to the corresponding base plate 2. The base plate 2 rotates relative to the vertical support 12 at an angle of 0°-90°. As can be seen from the above structure, the hinge assembly 9 includes a hinge fixing piece 91, a hinge rotating piece 92, and a hinge pin 93. The hinge fixing piece 91 can be fixed to the front wall of the corresponding vertical support 12 by means of bolts, welding, etc. The hinge rotating piece 92 is used to fix to the corresponding base plate 2, and the hinge rotating piece 92 is hinged to the hinge fixing piece 91 via the hinge pin 93. The central axis of the hinge pin 93 is its hinge rotation axis, and the hinge rotating piece 92 can rotate circumferentially along this axis. Therefore, the rotation of several hinge swivel pieces 92 in the hinge unit drives the base plate 2, which is fixed to the hinge unit, to rotate synchronously. Furthermore, the base plate 2 rotates relative to the vertical support 12 at angles ranging from 0° to 90°. This means that when both base plates 2 rotate at 0°, they are in a relatively closed state; when both base plates 2 rotate at 90°, they are open relative to each other and parallel to one another. During the outward opening process, the base plate 2 on the left rotates counterclockwise, and the base plate 2 on the right rotates clockwise.

[0045] The locking assembly 4 includes a latch 41 and a retainer 42. The latch 41 is movably mounted on the front wall of the sliding limit plate 35 of one telescopic half-cylinder 3, and the retainer 42 is mounted on the front wall of the sliding limit plate 35 of the other telescopic half-cylinder 3. The latch 41 is used to cooperate with the retainer 42 to lock or unlock the relative position of the two telescopic half-cylinders 3. As can be seen from the above structure, when the drive shaft under test needs protection, the two base plates 2 can be placed in a relatively closed state first. Then, the latch 41 and retainer 42 are used to lock the two sliding limit plates 35 located on the two telescopic half-cylinders 3 respectively, thereby locking the relative position of the two telescopic half-cylinders 3. Similarly, when disassembly is required, the latch 41 can be unlocked from the retainer 42 first, then the two base plates 2 can be opened to a parallel state before removing the tested drive shaft.

[0046] The first protective plate 31 and the second protective plate 32 are each provided with a plurality of through holes 10 arranged in an array; a fixing member is also included; the fixing member is used to simultaneously pass through the aligned through holes 10 on the first protective plate 31 and the second protective plate 32 and fix them, thereby fixing the relative position between the second protective plate 32 and the first protective plate 31. As can be seen from the above structure, after the second protective part extends to match the length of the drive shaft to be measured, the relative position between the second protective plate 32 and the first protective plate 31 can be fixed by the fixing member simultaneously passing through one or more pairs of aligned through holes 10 on the first protective plate 31 and the second protective plate 32, thereby fixing the position of the second protective part relative to the first protective part. Specifically, the fixing member can be a bolt assembly, which uses a bolt and nut to pass through the through holes 10 and clamp, thereby fixing the relative position between the second protective plate 32 and the first protective plate 31.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A protective cover for the drive shaft of a test bench, characterized in that: The system includes a support frame (1), two base plates (2), and two telescopic semi-cylinders (3). The support frame (1) includes a horizontal support (11) and vertical supports (12) connected to the left and right sides of the horizontal support (11). The base plates (2) are perpendicular to the horizontal plane and have semi-circular holes (21). The two base plates (2) are respectively hinged to the two vertical supports (12) and are mirror symmetrical. The two base plates (2) can be closed or moved away from each other by rotation, and when closed, the two semi-circular holes (21) enclose to form a circular through hole (10). The two telescopic semi-cylinders (3) are symmetrically arranged and fixed to the front end of the two base plates (2), and can be extended and retracted in the front and rear directions. When the two base plates (2) are closed relative to each other, the two telescopic semi-cylinders (3) enclose to form a circular sleeve structure. The system also includes a locking component (4). The locking component (4) is used to lock or unlock the two telescopic semi-cylinders (3) in the enclosed state.

2. The drive shaft protective cover of the test bench according to claim 1, characterized in that: The telescopic semi-cylinder (3) includes a first protective part and a second protective part slidably connected to the inner side of the first protective part; the first protective part includes a first protective plate (31) and a first support component (5) disposed inside the first protective plate (31); the second protective part includes a second protective plate (32) and a second support component (6) disposed inside the second protective plate (32); the first protective plate (31) and the second protective plate (32) are coaxially arranged and are both semi-circular plates protruding to the same side; the inner diameter of the first protective plate (31) is larger than the outer diameter of the second protective plate (32).

3. The drive shaft protective cover of the test bench according to claim 2, characterized in that: The first protective plate (31) has a first baffle (33) perpendicular to the first protective plate (31) at its front end and a rear end fixedly connected to the front wall of the corresponding base plate (2); the second protective plate (32) has a fixed plate (34) and a sliding limiting plate (35) at its front and rear ends respectively; the first baffle (33), the fixed plate (34) and the sliding limiting plate (35) are parallel and are all semi-circular plates; the inner diameter of the first baffle (33) is larger than the outer diameter of the second protective plate (32); the outer diameter of the sliding limiting plate (35) is larger than the inner diameter of the first baffle (33), and is used to limit the maximum extension distance of the second protective part when it moves forward by contacting and limiting the first baffle (33).

4. The drive shaft protective cover of the test bench according to claim 3, characterized in that: The first support component (5) is vertically connected between the first baffle (33) and the base plate (2) corresponding to the first baffle (33); the first support component (5) includes a plurality of first optical axes (51) and a plurality of first reinforcing ribs (52); the plurality of first optical axes (51) and the plurality of first reinforcing ribs (52) are alternately arranged and evenly distributed along the semi-circular contour of the first baffle (33).

5. The drive shaft protective cover of the test bench according to claim 4, characterized in that: The second support component (6) is vertically connected between the fixed plate (34) and the sliding limit plate (35); the second support component (6) includes several second optical axes (61) and several second reinforcing ribs (62); the several second optical axes (61) and several second reinforcing ribs (62) are alternately arranged and evenly distributed along the semi-circular contour of the fixed plate (34).

6. The drive shaft protective cover of the test bench according to claim 5, characterized in that: It also includes a semi-circular sliding reinforcing plate (36); the sliding reinforcing plate (36) is arranged parallel to the rear side of the sliding limiting plate (35); the sliding reinforcing plate (36) and the sliding limiting plate (35) are connected by several first optical axes (51) and are slidably supported between the first baffle (33) and the base plate (2) corresponding to the first baffle (33); both the sliding reinforcing plate (36) and the sliding limiting plate (35) are provided with several guide grooves (7); the guide grooves (7) on the sliding reinforcing plate (36) and the sliding limiting plate (35) correspond one-to-one and are used to cooperate with the first reinforcing rib (52) to achieve guidance; it also includes several third optical axes (8); the third optical axes (8) are vertically connected between the rear wall of the sliding limiting plate (35) and the front wall of the sliding reinforcing plate (36).

7. The drive shaft protective cover of the test bench according to claim 1, characterized in that: It also includes two hinge units; the two hinge units are symmetrically arranged on the front wall of the two vertical supports (12); each hinge unit includes several hinge components (9) arranged at intervals; each base plate (2) is vertically hinged to the front wall of the corresponding vertical support (12) through a hinge unit, so that the base plate (2) can move circumferentially closer to or away from the front wall of the vertical support (12) along the vertical hinge rotation axis; the two base plates (2) achieve relative closure or separation by rotating synchronously in opposite directions.

8. The drive shaft protective cover of the test bench according to claim 7, characterized in that: The hinge assembly (9) includes a hinge fixing piece (91), a hinge rotating piece (92), and a hinge pin (93); the hinge fixing piece (91) is fixed on the front wall of the corresponding vertical bracket (12), and the hinge rotating piece (92) is hinged to the hinge fixing piece (91) through the hinge pin (93); the hinge rotating piece (92) is used to be fixed to the corresponding base plate (2); the base plate (2) rotates relative to the vertical bracket (12) at an angle of 0°-90°.

9. The drive shaft protective cover of the test bench according to claim 1, characterized in that: The locking assembly (4) includes a latch (41) and a retainer (42); the latch (41) is movably mounted on the front wall of the sliding limit plate (35) of one telescopic half-cylinder (3), and the retainer (42) is mounted on the front wall of the sliding limit plate (35) of the other telescopic half-cylinder (3); the latch (41) is used to cooperate with the retainer (42) to lock or unlock the two sliding limit plates (35).

10. The drive shaft protective cover of the test bench according to claim 2, characterized in that: The first protective plate (31) and the second protective plate (32) are each provided with a plurality of through holes (10) arranged in an array; and also include a fixing member; the fixing member is used to pass through the through holes (10) aligned on the first protective plate (31) and the second protective plate (32) at the same time to fix the relative position between the second protective plate (32) and the first protective plate (31).

Images