Auxiliary device for fastener clamping force test

Abstract

The utility model relates to an auxiliary device for testing the clamping force of a fastener, which belongs to the technical field of fastener testing and comprises a bottom plate, a testing frame is fixed on the upper surface of the bottom plate, a testing plate is arranged above the testing frame, connecting holes are arranged on the upper surfaces of the testing frame and the testing plate, and the connecting holes are communicated with the testing frame and the testing plate. A connecting hole is formed in the bottom plate, a fastener body is arranged in the connecting hole, a supporting rod is fixed to the upper surface of the bottom plate, a supporting plate is fixed to the other end of the supporting rod, a tightening mechanism used for tightening a fastener is arranged on the supporting plate, and a testing mechanism used for testing clamping force is arranged on the supporting plate. According to the auxiliary device for the fastener clamping force test, the case and the motor can be driven to move through cooperation of the first electric push rod, so that a nut of a fastener is sleeved with the connecting sleeve, the fixing plate can be driven to move through cooperation of the air cylinder, so that the nut is fixed, the connecting sleeve can be driven to rotate through cooperation of the motor, and the clamping force of the fastener is tested. Therefore, the fastener is well fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of fastener testing, in particular to an auxiliary device for fastener clamping force testing. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening and connection and are extremely widely used. Fasteners are widely used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, etc. Various fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, instruments and supplies, etc. They are the most widely used mechanical basic parts.

[0003] For example, a Chinese utility model patent publication number (CN212363518U) discloses an auxiliary device for testing the clamping force of fasteners, which includes a workbench, side panels are fixed on both sides of the top of the workbench, a mounting block is fixed on the inner wall of the left side panel, a fixing assembly is clamped on the mounting block, two slide rails are symmetrically arranged on the top of the workbench, a mounting seat is slidably arranged on the slide rail, a slide groove is provided at the bottom of the mounting seat corresponding to the position of the slide rail, a clamping assembly is fixed on the top of the mounting seat, the clamping assembly is fixedly connected to one end of a dynamometer by a metal rope, and the other end of the dynamometer is fixedly connected to a hydraulic cylinder by a metal rope, and the hydraulic cylinder is fixed to the right side panel. This utility model solves the problem that the existing bolt clamping force testing auxiliary device can only detect bolts of the same type when used and has a small scope of application. However, in this patent, the nut can only be tightened manually by the staff, and manual tightening cannot make the bolt and the nut in the best connection state, resulting in deviation when testing the clamping force, affecting practicality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an auxiliary device for testing the clamping force of fasteners, which has the advantage of keeping the fasteners in an optimal connection state, and solves the problem in the patent that the nut can only be tightened manually by staff, and manual tightening cannot put the bolt and the nut in an optimal connection state, resulting in deviations when testing the clamping force, affecting practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an auxiliary device for testing the clamping force of a fastener, comprising a base plate, a test frame is fixed to the upper surface of the base plate, a test plate is arranged above the test frame, connection holes are opened on the upper surfaces of the test frame and the test plate, a fastener body is arranged inside the connection hole, a support rod is fixed to the upper surface of the base plate, a support plate is fixed to the other end of the support rod, a tightening mechanism for tightening the fastener is arranged on the support plate, and a test mechanism for testing the clamping force is arranged on the support plate;

[0006] The tightening mechanism includes a first electric push rod, which is fixed to the upper surface of the support plate. The output shaft of the first electric push rod passes through and extends to the lower side of the support plate and is fixed to a chassis. A motor is fixed to the inner bottom wall of the chassis. The output shaft of the motor passes through and extends to the lower side of the chassis and is fixed to a rotating rod, and a fixing component is provided on the rotating rod.

[0007] Furthermore, the test stand is C-shaped with its opening facing downward.

[0008] Furthermore, the number of the support rods is four, and they are evenly distributed at the four corners of the upper surface of the base plate.

[0009] Furthermore, the fixing assembly includes a connecting sleeve, which is fixed to the bottom end of the rotating rod, and a cylinder is fixed to the outer side of the connecting sleeve. The output shaft of the cylinder passes through and extends to the inside of the connecting sleeve and is fixed with a fixing plate.

[0010] Furthermore, the number of the cylinders is two, and they are symmetrically distributed about the central axis of the connecting sleeve.

[0011] Furthermore, the testing mechanism includes a second electric push rod, which is fixed to the upper surface of the support plate, and the output shaft of the second electric push rod passes through and extends to the lower side of the support plate and is fixed with a first connecting rope, and the other end of the first connecting rope is fixed with a tensioner, and the lower surface of the tensioner is fixed with a second connecting rope, and the other end of the second connecting rope passes through and extends to the lower side of the test plate and is fixed with a force plate.

[0012] Furthermore, the number of the second electric push rods is two, and they are symmetrically distributed about the central axis of the support plate.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The auxiliary device for fastener clamping force testing can drive the chassis to move through the cooperation of the first electric push rod, thereby driving the motor to move, so that the connecting sleeve can cover the nut of the fastener. Through the cooperation of the cylinder, the fixing plate can be driven to move, so that the nut inside the connecting sleeve can be fixed. Through the cooperation of the motor, the rotating rod can be driven to rotate, so that the connecting sleeve drives the fixed nut to rotate, so that the fastener achieves the best fastening effect.

[0015] 2. The auxiliary device for testing the clamping force of fasteners can drive the first connecting rope to move, thereby driving the tensioner to move, through the cooperation of the second electric push rod. Through the cooperation of the tensioner, the pulling force used by the first connecting rope when pulling the second connecting rope can be measured, thereby testing the clamping force of the fastener. Through the cooperation of the force-bearing plate, the force-bearing area of ​​the test plate can be increased, thereby avoiding bending of the test plate during testing, which leads to errors in the clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the tightening mechanism of the utility model;

[0018] Figure 3 It is a schematic diagram of the testing mechanism of the utility model.

[0019] In the figure: 1 base plate, 2 test frame, 3 test plate, 4 connecting hole, 5 fastener body, 6 support rod, 7 support plate, 8 tightening mechanism, 801 first electric push rod, 802 chassis, 803 motor, 804 rotating rod, 805 connecting sleeve, 806 cylinder, 807 fixing plate, 9 testing mechanism, 901 second electric push rod, 902 first connecting rope, 903 tensioner, 904 second connecting rope, 905 force plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 In this embodiment, an auxiliary device for testing the clamping force of a fastener includes a base plate 1, a test frame 2 is fixed on the upper surface of the base plate 1, a test plate 3 is arranged above the test frame 2, a connecting hole 4 is opened on the upper surface of the test frame 2 and the test plate 3, a fastener body 5 is arranged inside the connecting hole 4, so that the fastener body 5 can connect and install the test plate 3 and the test frame 2, so as to facilitate testing the clamping force of the fastener body 5, a support rod 6 is fixed on the upper surface of the base plate 1, a support plate 7 is fixed at the other end of the support rod 6, a tightening mechanism 8 for tightening the fastener is arranged on the support plate 7, so that the fastener can be in the best tightening state, which is convenient for testing the accurate clamping force, and a test mechanism 9 for testing the clamping force is arranged on the support plate 7 to prevent the deformation of the object to be tested and cause errors.

[0022] Among them, the test frame 2 is C-shaped with the opening facing downward to connect the fastener body 5 so that the nut is positioned upward. There are four support rods 6, which are evenly distributed at the four corners of the upper surface of the base plate 1 to maintain the stability of the support plate 7.

[0023] See also Figure 2 In order to make the fastener in the best tightening state and facilitate the testing of accurate clamping force, the tightening mechanism 8 in this embodiment includes a first electric push rod 801, which is fixed to the upper surface of the support plate 7, and the output shaft of the first electric push rod 801 passes through and extends to the lower side of the support plate 7, and is fixed with a chassis 802, the output shaft of the first electric push rod 801 drives the chassis 802 to move, and the inner bottom wall of the chassis 802 is fixed with a motor 803, the chassis 802 drives the motor 803 to move, the output shaft of the motor 803 passes through and extends to the lower side of the chassis 802, and is fixed with a rotating rod 804, the motor 803 drives the rotating rod 804 to move, and a fixing component is arranged on the rotating rod 804.

[0024] In this example, the fixing assembly includes a connecting sleeve 805, which is fixed to the bottom end of the rotating rod 804, and the rotating rod 804 drives the connecting sleeve 805 to move. A cylinder 806 is fixed to the outer side of the connecting sleeve 805, and the output shaft of the cylinder 806 passes through and extends to the interior of the connecting sleeve 805, and is fixed with a fixing plate 807. The output shaft of the cylinder 806 drives the fixing plate 807 to move, so that the fixing plate 807 fixes the nut. At this time, the motor 803 is turned on, and the output shaft of the motor 803 drives the rotating rod 804 to rotate, and the rotating rod 804 drives the connecting sleeve 805 to rotate, so that the fixed nut rotates, thereby maintaining the best fastening effect between the test plate 3 and the test frame 2.

[0025] It should be noted that there are two cylinders 806, which are symmetrically distributed on the left and right sides of the central axis of the connecting sleeve 805, and the nuts are fixed from both sides.

[0026] See also Figure 3In order to prevent the measured object from deforming and causing errors, the testing mechanism 9 in this embodiment includes a second electric push rod 901, which is fixed to the upper surface of the support plate 7. The output shaft of the second electric push rod 901 passes through and extends to the lower side of the support plate 7, and is fixed with a first connecting rope 902. The output shaft of the second electric push rod 901 drives the first connecting rope 902 to move. A tensioner 903 is fixed to the other end of the first connecting rope 902. The first connecting rope 902 drives the tensioner 903 to move. A second connecting rope 904 is fixed to the lower surface of the tensioner 903. 903 drives the second connecting rope 904 to move, and the other end of the second connecting rope 904 passes through and extends to the lower side of the test plate 3, and is fixed with a force plate 905. The second connecting rope 904 drives the force plate 905 to move. When the position of the test plate 3 does not change, the value measured by the tensioner 903 is equal to the tightening force of the fastener, so that the tensioner 903 can test the tightening force of the fastener, and the force plate 905 can change the force position of the test plate 3 from a point to a surface, thereby avoiding the situation that the position of the test plate 3 does not change during the test but generates bending deformation, thereby preventing errors in the test.

[0027] In this example, there are two second electric push rods 901, which are symmetrically distributed about the central axis of the support plate 7, so that the test plate 3 can be evenly stressed and both sides can be measured simultaneously, which can improve the accuracy of the test.

[0028] The working principle of the above embodiment is:

[0029] (1) First, insert the fastener body 5 to be tested into the connecting hole 4 and tighten it preliminarily to connect the test plate 3 and the test frame 2. Then, turn on the first electric push rod 801. The output shaft of the first electric push rod 801 drives the chassis 802 to move. The chassis 802 drives the motor 803 to move. The motor 803 drives the rotating rod 804 to move. The rotating rod 804 drives the connecting sleeve 805 to move. The connecting sleeve 805 is sleeved on the outer side of the nut on the fastener body 5. Then, turn on the cylinder 806. The output shaft of the cylinder 806 drives the fixing plate 807 to move. The fixing plate 807 fixes the nut. At this time, turn on the motor 803. The output shaft of the motor 803 drives the rotating rod 804 to rotate. The rotating rod 804 drives the connecting sleeve 805 to rotate, so that the fixed nut rotates, so that the best fastening effect can be maintained between the test plate 3 and the test frame 2.

[0030] (2) After the test plate 3 and the test frame 2 are fastened, the second electric push rod 901 is turned on, and the output shaft of the second electric push rod 901 drives the first connecting rope 902 to move, the first connecting rope 902 drives the tensioner 903 to move, the tensioner 903 drives the second connecting rope 904 to move, and the second connecting rope 904 drives the force plate 905 to move. When the position of the test plate 3 does not change, the value measured by the tensioner 903 is equal to the tightening force of the fastener, so that the tensioner 903 can test the tightening force of the fastener, and the force plate 905 can change the force position of the test plate 3 from a point to a surface, thereby avoiding the test plate 3 from bending deformation even though the position does not change during the test, thereby preventing errors in the test.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. An auxiliary device for testing the clamping force of a fastener, comprising a base plate (1), characterized in that: A test frame (2) is fixed on the upper surface of the base plate (1), a test plate (3) is arranged above the test frame (2), a connection hole (4) is opened on the upper surface of the test frame (2) and the test plate (3), a fastener body (5) is arranged inside the connection hole (4), a support rod (6) is fixed on the upper surface of the base plate (1), a support plate (7) is fixed at the other end of the support rod (6), a tightening mechanism (8) for tightening the fastener is arranged on the support plate (7), and a testing mechanism (9) for testing the clamping force is arranged on the support plate (7); The tightening mechanism (8) comprises a first electric push rod (801), the first electric push rod (801) is fixed to the upper surface of the support plate (7), the output shaft of the first electric push rod (801) passes through and extends to the lower side of the support plate (7), and is fixed with a chassis (802), a motor (803) is fixed to the inner bottom wall of the chassis (802), the output shaft of the motor (803) passes through and extends to the lower side of the chassis (802), and is fixed with a rotating rod (804), and a fixing component is arranged on the rotating rod (804).

2. The auxiliary device for fastener clamping force testing according to claim 1, characterized in that: The test frame (2) is in a C-shape, with its opening facing downwards.

3. The auxiliary device for fastener clamping force testing according to claim 1, characterized in that: The number of the support rods (6) is four and they are evenly distributed at the four corners of the upper surface of the bottom plate (1).

4. The auxiliary device for fastener clamping force testing according to claim 1, characterized in that: The fixing assembly comprises a connecting sleeve (805), wherein the connecting sleeve (805) is fixed to the bottom end of the rotating rod (804), a cylinder (806) is fixed to the outside of the connecting sleeve (805), an output shaft of the cylinder (806) passes through and extends to the inside of the connecting sleeve (805), and a fixing plate (807) is fixed thereto.

5. The auxiliary device for fastener clamping force testing according to claim 4, characterized in that: The number of the cylinders (806) is two, and they are symmetrically distributed about the central axis of the connecting sleeve (805).

6. The auxiliary device for fastener clamping force testing according to claim 1, characterized in that: The testing mechanism (9) comprises a second electric push rod (901), the second electric push rod (901) is fixed to the upper surface of the support plate (7), the output shaft of the second electric push rod (901) passes through and extends to the lower side of the support plate (7), and is fixed with a first connecting rope (902), the other end of the first connecting rope (902) is fixed with a tensioner (903), the lower surface of the tensioner (903) is fixed with a second connecting rope (904), the other end of the second connecting rope (904) passes through and extends to the lower side of the test plate (3), and is fixed with a force-bearing plate (905).

7. An auxiliary device for fastener clamping force testing according to claim 6, characterized in that: The number of the second electric push rods (901) is two, and they are symmetrically distributed left and right about the central axis of the support plate (7).

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