A tool for detecting the smoothness of automotive screw rods

Abstract

The present invention belongs to the field of screw rod detection, and specifically is a tool for detecting the smoothness of automobile screw rods, comprising a flat plate, the bottom end of the flat plate is fixedly connected to a bottom shell, the top end of the flat plate is fixedly connected to a support plate and a mounting plate, the top end of the support plate is fixedly connected to a marking plate, the marking plate contacts the bottom end of a marking pen, a marking mechanism is provided on the marking pen, the marking mechanism is used to draw a moving trajectory of a screw rod nut, a through groove is opened in the middle of the flat plate, the through groove is connected to the inside of the bottom shell, and a synchronization mechanism is provided inside the bottom shell; through the structural design of the marking mechanism, when the screw rod is stuck or not smooth during movement, the stuck position can be easily found by comparing the moving trajectory drawn by the marking pen on the marking plate, thereby more intuitively reflecting the stuck position of the screw rod, so that the detection personnel can quickly locate the stuck position.

Description

Technical Field

[0001] The invention relates to the field of screw rod detection, in particular to a tool used for detecting the smoothness of a screw rod of an automobile. Background Art

[0002] After the automotive lead screw is processed, it may get stuck and move unsmoothly due to processing errors, improper assembly, etc. Therefore, it is necessary to use tools to detect the smoothness of the lead screw and screen out the unsmooth lead screws to ensure the quality of the lead screw.

[0003] According to the tooling for detecting the smoothness of the screw proposed in the patent document CN202223473351.3, the tooling includes a workbench, a detection part and a power control part, the detection part and the power control part are both arranged on the workbench, the detection part includes a tooling table, a screw rotating part, a torque sensor and a stepper motor, the tooling table is fixed on the workbench and the screw rotating part is installed on the tooling table, the stepper motor is arranged at one end of the tooling table and is used to drive the screw rotating part to rotate on the tooling table, and the torque sensor is arranged between the screw rotating part and the stepper motor and is used to collect the torque value of the screw rotating part when it rotates. In this case, the torque value change of the screw operation is collected by the torque sensor; the rotation of the stepper motor drives the torque sensor to rotate, thereby driving the operation of the screw, and the smoothness of the screw operation acts on the torque sensor through the reaction force of the rotation, thereby realizing the data collection of the smoothness of the screw.

[0004] However, the screw smoothness detection tool in the above technology collects the data of the screw smoothness through the torque sensor, but the position where the screw is stuck cannot be reflected more intuitively. The detection personnel sometimes need to determine the position where the screw is stuck before they can better inspect and maintain the screw, which results in the detection personnel needing to find the position where the screw is stuck based on the collected data, which consumes a lot of time. Therefore, in order to solve the above problem, a tool for detecting the smoothness of automobile screws is proposed. Summary of the invention

[0005] In order to solve the problem that the screw smoothness detection tool in the above technology collects the data of the screw smoothness through a torque sensor, but the position where the screw is stuck cannot be reflected more intuitively. The detection personnel sometimes need to determine the position where the screw is stuck before they can better inspect and maintain the screw, which results in the detection personnel needing to find the position where the screw is stuck based on the collected data, which consumes a lot of time. The present invention proposes a tool for detecting the smoothness of automobile screws.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the tool for detecting the smoothness of an automobile screw rod described in the present invention comprises a flat plate, the bottom end of the flat plate is fixedly connected to a bottom shell, the top end of the flat plate is fixedly connected to a support plate and a mounting plate, the top end of the support plate is fixedly connected to a marking plate, the marking plate contacts the bottom end of a marking pen, a marking mechanism is provided on the marking pen, the marking mechanism is used to draw a moving trajectory of a screw rod nut, a through groove is provided in the middle portion of the flat plate, the through groove is connected to the interior of the bottom shell, a synchronization mechanism is provided inside the bottom shell, the synchronization mechanism is used to ensure that a standard screw rod and a screw rod to be tested can rotate synchronously, a screw rod nut is sleeved on the screw rod to be tested, a detection mechanism is provided at the bottom end of the screw rod nut, the detection mechanism is used to visualize the smoothness of the screw rod to be tested.

[0007] The top end of the connecting rod is fixedly connected to the movable frame, and the bottom end of the connecting rod is fixedly connected to the movable frame, and the movable frame is rotatably connected to the movable frame.

[0008] Preferably, the synchronization mechanism includes a standard screw rod, the left side of the standard screw rod is rotatably connected to the inner wall of the bottom shell, the right side of the standard screw rod is fixedly connected to a handle, the handle passes through the right side of the bottom shell, the right side of the standard screw rod is sleeved with a driving gear, the top end of the driving gear is meshed with a connecting gear, the connecting gear is rotatably connected to the flat plate, the top end of the connecting gear is meshed with a driven gear, the driven gear is sleeved with a rubber ring, the rubber ring is sleeved on the screw rod to be tested, the driven gear is rotatably connected to the second support frame, the left side of the screw rod to be tested is abutted against the first support frame, and the bottom end of the second support frame is fixedly connected to the flat plate.

[0009] Preferably, the detection mechanism includes two groups of abutment plates, one side of the abutment plate contacts with the screw nut, the bottom of the abutment plate is slidably connected to the sliding groove, the sliding groove is opened at the top of the collection box, the bottom of the abutment plate is fixedly connected to the moving rack, the moving rack is inserted into the fixed rod, the fixed rod is fixedly connected to the inner wall of the cavity, the cavity is opened inside the collection box, the cavity is opened with two groups of cavities and the two groups of cavities are not connected, one side of the moving rack contacts with the supporting spring, the supporting spring is sleeved on the fixed rod, the side of the supporting spring away from the moving rack is fixedly connected to the inner wall of the cavity, the moving rack meshes with the rotating gear, the rotating gear is rotatably connected to the inside of the cavity, the bottom end of the rotating gear is fixedly connected to the scale plate, the scale plate is rotatably connected to the inside of the rotating groove, and the rotating groove is opened inside the collection box.

[0010] Preferably, the first support frame is slidably connected to the inside of the groove, the bottom end of the first support frame passes through the bottom end of the inner wall of the groove, and one side of the first support frame abuts against the screw.

[0011] Preferably, four sets of pulleys are fixedly connected to the bottom end of the bottom plate, and the pulleys are slidably connected to a slide groove, and the slide groove is opened at the top of the flat plate.

[0012] Preferably, two sets of fixing plates are fixedly connected to the bottom end of the collection box, the fixing plates are slidably connected to the guide grooves, the guide grooves are opened at the top of the bottom plate, the top of the bottom plate is fixedly connected to a magnet, and the magnet is attracted to the bottom end of the collection box.

[0013] Preferably, a movable groove is provided at the bottom end of the collection box, a fixed spring is fixedly connected to the inner wall of the movable groove, the bottom end of the fixed spring is fixedly connected to a sphere, the bottom end of the sphere is clamped in the clamping groove, and the clamping groove is provided at the top end of the bottom plate.

[0014] Preferably, two groups of support blocks are fixedly connected to one side of the bottom end of the connecting piece, and the support blocks are in contact with the screw nut. A pad is fixedly connected to the middle of the bottom end of the connecting piece, and the pad is made of rubber.

[0015] Preferably, two groups of sliding blocks are fixedly connected to the connecting rod, and the sliding blocks are slidably connected in the long grooves, and the long grooves are opened on the supporting plate.

[0016] The present invention is beneficial in that:

[0017] 1. The present invention adopts the structural design of the marking mechanism. When the screw rod gets stuck or is not smooth during movement, the position of the jam can be easily found by comparing the moving trajectory drawn by the marking pen on the marking board, thereby more intuitively reflecting the position of the screw rod jam, so that the inspection personnel can quickly locate the jammed position, which solves the problem of screw rod smoothness detection tooling in the prior art. The screw rod smoothness data is collected by the torque sensor, but the position where the screw rod is stuck cannot be more intuitively reflected. The inspection personnel sometimes need to determine the position where the screw rod is stuck before they can better inspect and maintain the screw rod, which results in the inspection personnel having to search for the position where the screw rod is stuck based on the collected data, which consumes a lot of time.

[0018] 2. The present invention realizes the function of visualizing the smoothness of the screw through a dial through the structural design of the detection mechanism. The detection personnel can directly judge the angle of rotation of the dial during the screw detection process through the scale engraved on the dial, thereby facilitating the evaluation of the overall smoothness of the screw and the collection of corresponding data.

[0019] 3. The present invention realizes the function of synchronously rotating the standard screw and the screw to be tested through the structural design of the synchronization mechanism. The rotation on the standard screw can be transmitted to the screw to be tested through the connecting gear, which ensures synchronous rotation while reducing the deviation caused by manual rotation of the screw to be tested, making the detection result more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the back end of the present invention;

[0023] Figure 3 It is a schematic diagram of the position structure of the screw rod to be tested of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the top end of the screw nut of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection structure of the connecting piece of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the synchronization mechanism of the present invention;

[0027] Figure 7 It is a schematic diagram of the installation structure of the base plate and the collection box of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the bottom end of the collection box of the present invention;

[0029] Fig. 9 It is a schematic diagram of the internal structure of the collection box of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure inside the bottom shell of the present invention.

[0031] In the figure: 1, flat plate; 20, bottom shell; 21, standard screw; 22, moving block; 23, driving gear; 24, handle; 25, connecting gear; 26, driven gear; 27, rubber ring; 28, screw to be tested; 29, screw nut; 30, first support frame; 31, groove; 32, through groove; 33, support rod; 34, connecting block; 35, pulley; 36, slide groove; 37, bottom plate; 38, connecting rod; 39, slider; 40, support plate; 41, marking plate; 42, long groove; 43, marking pen; 44, fixed cylinder; 45, connecting rod; 46, push rod Rod; 47, turntable; 48, fixed rack; 49, fixed gear; 50, second support frame; 51, connecting piece; 52, support block; 53, pad; 54, bracket; 55, trapezoidal block; 56, guide groove; 57, fixed plate; 58, collection box; 59, card slot; 60, magnet; 61, ball; 62, fixed spring; 63, movable groove; 64, abutment plate; 65, sliding groove; 66, cavity; 67, fixed rod; 68, support spring; 69, movable rack; 70, rotating groove; 71, rotating gear; 72, dial; 73, mounting plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0033] See also Figure 1 - Fig.10As shown, a tool for detecting the smoothness of a screw rod of an automobile comprises a flat plate 1, the bottom end of the flat plate 1 is fixedly connected to a bottom shell 20, the top end of the flat plate 1 is fixedly connected to a support plate 40 and a mounting plate 73, the top end of the support plate 40 is fixedly connected to a marking plate 41, the marking plate 41 contacts the bottom end of a marking pen 43, a marking mechanism is provided on the marking pen 43, the marking mechanism is used to draw a moving track of a screw nut 29, a through groove 32 is provided in the middle of the flat plate 1, the through groove 32 is communicated with the inside of the bottom shell 20, a synchronization mechanism is provided inside the bottom shell 20, the synchronization mechanism is used to ensure that the standard screw rod 21 and the screw rod 28 to be tested can rotate synchronously, a screw nut 29 is sleeved on the screw rod 28 to be tested, a detection mechanism is provided at the bottom end of the screw nut 29, the detection mechanism is used to visualize the smoothness of the screw rod 28 to be tested;

[0034] Further, the marking mechanism includes a fixed cylinder 44, to which a marking pen 43 is fixedly connected, a rear end of the fixed cylinder 44 is rotatably connected to a connecting rod 45, a rear end of the connecting rod 45 is rotatably connected to a push rod 46, a bottom end of the push rod 46 is rotatably connected to a turntable 47, a trapezoidal block 55 is fixedly connected to the bottom end of the connecting rod 45, the trapezoidal block 55 is slidably connected to the top end of a bracket 54, a bottom end of the bracket 54 is fixedly connected to a connecting piece 51, a bottom end of the connecting piece 51 contacts the top end of a screw nut 29, and a top end of the connecting piece 51 is rotatably connected to a fixed gear 49. The fixed gear 49 is fixedly connected to the bottom end of the turntable 47, the fixed gear 49 is meshed with the fixed rack 48, the fixed rack 48 is fixedly connected to the mounting plate 73, the left and right sides of the marking pen 43 are in contact with the top of the connecting rod 38, the bottom end of the connecting rod 38 is fixedly connected to the bottom plate 37, the bottom end of the bottom plate 37 is fixedly connected with a connecting block 34, the connecting block 34 is penetrated by the support rod 33, the support rod 33 is fixedly connected to the inner wall of the through groove 32, the bottom end of the connecting block 34 is fixedly connected to the moving block 22, and the moving block 22 is sleeved on the standard screw rod 21;

[0035] Through the structural design of the marking mechanism, when the screw rod is stuck or not smooth during movement, the position of the jam can be easily found by comparing the moving track drawn by the marking pen 43 on the marking plate 41, thereby more intuitively reflecting the position of the screw rod jam, so that the inspection personnel can quickly locate the jam position. When working, first insert one side of the screw rod 28 to be tested into the driven gear 26, and the other side of the screw rod 28 to be tested is supported and fixed by the abutment of the first support frame 30, and then the connecting piece 51 is placed on the top of the screw nut 29 and the screws on both sides of the connecting piece 51 are screwed. The connecting piece 51 can be fixed on the screw nut 29, and ensure that the screw nut 29 is aligned with the moving block 22. At this time, turn the handle 24, the standard screw rod 21 and the screw rod 28 to be tested will rotate synchronously, and when the screw nut 29 moves horizontally, the fixed gear 49 will mesh with the fixed rack 48, and the fixed gear 49 rotates. The disk 47 will pull the push rod 46, and the push rod 46 will push the connecting rod 45, thereby causing the connecting rod 45 to reciprocate in the front and rear directions, and the marking pen 43 fixed in the fixed cylinder 44 will move back and forth, and the moving trajectory of the marking pen 43 will be drawn on the marking plate 41. The marking pen 43 is in contact with the connecting rod 38 on both sides, and the bottom end of the connecting rod 38 is fixed on the bottom plate 37. The connecting block 34 fixed at the bottom end of the bottom plate 37 slides in the support rod 33 to ensure the stable movement of the moving block 22 on the standard screw rod 21 and provide support for the movement of the bottom plate 37. When the movement of the screw nut 29 is stuck, since the speed of the connecting rod 38 remains unchanged, the connecting rod 38 will push the marking pen 43, causing the marking pen 43 to deflect a certain angle, thereby causing the trajectory of the marking pen 43 drawn on the marking plate 41 to be tortuous. By finding the irregular places where the marking appears on the marking plate 41, the position where the screw rod 28 to be tested is stuck can be easily found.

[0036] Further, the synchronization mechanism includes a standard screw rod 21, the left side of the standard screw rod 21 is rotatably connected to the inner wall of the bottom shell 20, the right side of the standard screw rod 21 is fixedly connected to a handle 24, the handle 24 passes through the right side of the bottom shell 20, the right side of the standard screw rod 21 is sleeved with a driving gear 23, the top end of the driving gear 23 is meshed with a connecting gear 25, the connecting gear 25 is rotatably connected to the flat plate 1, the top end of the connecting gear 25 is meshed with a driven gear 26, the driven gear 26 is sleeved with a rubber ring 27, the rubber ring 27 is sleeved on the screw rod 28 to be tested, the driven gear 26 is rotatably connected to the second support frame 50, the left side of the screw rod 28 to be tested is abutted against the first support frame 30, and the bottom end of the second support frame 50 is fixedly connected to the flat plate 1;

[0037] Through the structural design of the synchronization mechanism, the function of synchronously rotating the standard screw rod 21 and the screw rod 28 to be tested is realized. The rotation of the standard screw rod 21 can be transmitted to the screw rod 28 to be tested through the connecting gear 25, which ensures the synchronous rotation and reduces the deviation caused by manual rotation of the screw rod 28 to be tested, so that the detection result is more accurate. During operation, in the process of turning the handle 24, the handle 24 will drive the standard screw rod 21 to rotate inside the bottom shell 20. The standard screw rod 21 is provided with a driving gear 23. The rotation of the driving gear 23 will drive the connecting gear 25 to rotate. The connecting gear 25 rotates on the flat plate 1 and the flat plate 1 is provided with a The slot corresponding to the connecting gear 25 is used to ensure the normal rotation of the connecting gear 25. The connecting gear 25 then transmits the rotation to the driven gear 26, so that the driven gear 26 can drive the measured screw rod 28 to rotate, and ensure that the standard screw rod 21 and the measured screw rod 28 can rotate synchronously. A hole corresponding to the radius of the measured screw rod 28 is opened at the center of the driven gear 26, and a rubber ring 27 is also sleeved in the hole. When the measured screw rod 28 is inserted into the driven gear 26, the rubber ring 27 is in contact with the measured screw rod 28 to ensure that the measured screw rod 28 will not slide relative to the driven gear 26 during the rotation of the driven gear 26.

[0038] Furthermore, the detection mechanism includes two groups of abutment plates 64, one side of the abutment plates 64 contacts the screw nut 29, the bottom end of the abutment plates 64 is slidably connected to the sliding groove 65, the sliding groove 65 is provided at the top of the collection box 58, the bottom end of the abutment plates 64 is fixedly connected to the moving rack 69, the moving rack 69 is inserted on the fixing rod 67, the fixing rod 67 is fixedly connected to the inner wall of the cavity 66, the cavity 66 is provided inside the collection box 58, and the cavity 66 is provided with two groups and the two groups of cavities 66 is not connected, one side of the moving rack 69 contacts with the support spring 68, the support spring 68 is sleeved on the fixed rod 67, the side of the support spring 68 away from the moving rack 69 is fixedly connected to the inner wall of the cavity 66, the moving rack 69 is meshed with the rotating gear 71, the rotating gear 71 is rotatably connected inside the cavity 66, the bottom end of the rotating gear 71 is fixedly connected to the dial 72, the dial 72 is rotatably connected inside the rotating slot 70, and the rotating slot 70 is opened inside the collection box 58;

[0039] Through the structural design of the detection mechanism, the function of visualizing the smoothness of the screw rod through the scale plate 72 is realized. The detection personnel can directly judge the angle of rotation of the scale plate 72 during the screw rod detection process through the scale engraved on the scale plate 72, so as to facilitate the evaluation of the overall smoothness of the screw rod and the collection of corresponding data. When working, when the screw nut 29 moves along one side on the screw rod 28 to be tested, the bottom end of the screw nut 29 will abut against one set of abutment plates 64, the abutment plates 64 slide in the sliding grooves 65 and the bottom ends are connected to the moving racks 69. The bottom end of the collection box 58 is placed on the bottom plate 37 and can move synchronously with the bottom plate 37. When the screw nut 29 moves to the position where the screw rod 28 to be tested is stuck, due to the moving block 2 2 drives the bottom plate 37 to move at a constant speed, so the collection box 58 and the bottom end of the screw nut 29 slide relative to each other and deviate. At this time, the screw nut 29 will push the abutment plate 64 to move, and the moving rack 69 will drive the rotating gear 71 to rotate. The dial 72 fixed on the bottom end of the rotating gear 71 will rotate inside the rotating groove 70, and the support spring 68 will be compressed. The support spring 68 can support the moving rack 69 to ensure that the position of the moving rack 69 can remain fixed when the abutment plate 64 is not pushed by the screw nut 29. The more stuck positions there are on the screw 28 to be tested, the greater the rotation angle of the dial 72. After the test is completed, the smoothness of the screw 28 to be tested can be evaluated by comparing the rotation angle of the dial 72.

[0040] Furthermore, the first support frame 30 is slidably connected inside the groove 31, the bottom end of the first support frame 30 passes through the bottom end of the inner wall of the groove 31, and one side of the first support frame 30 abuts against the screw;

[0041] During operation, the first support frame 30 slides in the groove 31. By screwing the screw abutting against the first support frame 30, the first support frame 30 can be moved close to or away from the screw rod 28 to be measured. The first support frame 30 abuts against the screw rod 28 to be measured, thereby fixing and supporting the screw rod 28 to be measured. The first support frame 30 is moved away from the screw rod 28 to be measured, so as to facilitate the removal of the screw rod 28 to be measured.

[0042] Furthermore, four sets of pulleys 35 are fixedly connected to the bottom end of the bottom plate 37, and the pulleys 35 are slidably connected to the slide grooves 36, and the slide grooves 36 are opened at the top of the flat plate 1;

[0043] During operation, four groups of pulleys 35 are fixed to the bottom of the bottom plate 37. During the movement of the bottom plate 37, the pulleys 35 at the bottom slide in the slide grooves 36 to ensure the stability of the movement, so that the bottom plate 37 can move stably.

[0044] Further, two fixing plates 57 are fixedly connected to the bottom end of the collection box 58. The fixing plates 57 are slidably connected to the guiding grooves 56, and the guiding grooves 56 are formed in the top end of the bottom plate 37. A magnet 60 is fixedly connected to the top end of the bottom plate 37, and the magnet 60 is attracted to the bottom end of the collection box 58;

[0045] During operation, the fixing plates 57 at the bottom end of the collection box 58 slide in the guiding grooves 56. The fixing plates 57 move along the direction of the guiding grooves 56, and then the collection box 58 can be taken out. A magnet 60 is also embedded in the top end of the bottom plate 37, and the magnet 60 is used to fix the bottom end of the collection box 58 on the bottom plate 37.

[0046] Further, an activity groove 63 is formed in the bottom end of the collection box 58. A fixing spring 62 is fixedly connected to the inner wall of the activity groove 63. The bottom end of the fixing spring 62 is fixedly connected to a spherical ball 61. The bottom end of the spherical ball 61 is clamped in a clamping groove 59, and the clamping groove 59 is formed in the top end of the bottom plate 37;

[0047] During operation, the spherical ball 61 is clamped in the clamping groove 59, which can assist in fixing the collection box 58. During the process of removing the collection box 58 and then placing the collection box 58 back on the bottom plate 37, the spherical ball 61 will first abut against the bottom plate 37, and the fixing spring 62 will be compressed. When the spherical ball 61 moves to the position of the clamping groove 59, the spherical ball 61 will be clamped into the clamping groove 59 under the action of the fixing spring 62. At the same time, the sound generated by the collision between the spherical ball 61 and the clamping groove 59 is used to indicate that the collection box 58 has been installed in place. Embodiment 2

[0048] Please refer to Figure 4 and Figure 5 As shown, as another implementation manner of the present invention compared with Embodiment 1, two support blocks 52 are fixedly connected to one side of the bottom end of the connecting member 51. The support blocks 52 are in contact with the lead screw nut 29. A cushion plate 53 is fixedly connected to the middle of the bottom end of the connecting member 51, and the cushion plate 53 is made of rubber material;

[0049] During operation, the bottom end of the support block 52 is designed in an arc shape to fit the top end of the lead screw nut 29 to provide support for the bottom end of the connecting member 51. A part of the bottom end of the connecting member 51 is designed in a U shape, which is adapted to the shape of the lead screw nut 29. The cushion plate 53 can enable the connecting member 51 to be stably placed on the lead screw nut 29.

[0050] Two sliding blocks 39 are fixedly connected to the connecting rod 38. The sliding blocks 39 are slidably connected to the long grooves 42, and the long grooves 42 are formed in the support plate 40;

[0051] During operation, since the overall length of the connecting rod 38 is relatively long, in order to prevent the connecting rod 38 from shaking when moving, two groups of sliders 39 are fixed on the connecting rod 38. The sliders 39 connect the two groups of connecting rods 38 together, and the sliders 39 slide in the long grooves 42, which can reduce the shaking amplitude of the screw rod 28 to be tested when it moves.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A tool for detecting the smoothness of a screw rod of an automobile, comprising a flat plate, characterized in that: The bottom end of the flat plate is fixedly connected with a bottom shell, the top end of the flat plate is fixedly connected with a support plate and a mounting plate, the top end of the support plate is fixedly connected with a marking plate, the marking plate contacts the bottom end of the marking pen, a marking mechanism is provided on the marking pen, the marking mechanism is used to draw the moving track of the screw nut, a through groove is provided in the middle of the flat plate, the through groove is connected with the inside of the bottom shell, a synchronization mechanism is provided inside the bottom shell, the synchronization mechanism is used to ensure that the standard screw and the screw to be tested can rotate synchronously, a screw nut is sleeved on the screw to be tested, a detection mechanism is provided at the bottom end of the screw nut, the detection mechanism is used to visualize the smoothness of the screw to be tested; The marking mechanism includes a fixed cylinder, a marking pen is fixedly connected to the fixed cylinder, the rear end of the fixed cylinder is rotatably connected to the connecting rod, the rear end of the connecting rod is rotatably connected to the push rod, the bottom end of the push rod is rotatably connected to the turntable, the bottom end of the connecting rod is fixedly connected to a trapezoidal block, the trapezoidal block is slidably connected to the top end of the bracket, the bottom end of the bracket is fixedly connected to a connecting piece, the bottom end of the connecting piece contacts with the top end of a screw nut, the top end of the connecting piece is rotatably connected to a fixed gear, the fixed gear is fixedly connected to the bottom end of the turntable, the fixed gear meshes with a fixed rack, the fixed rack is fixedly connected to a mounting plate, the left and right sides of the marking pen are both in contact with the top end of the connecting rod, the bottom end of the connecting rod is fixedly connected to the bottom plate, the bottom end of the bottom plate is fixedly connected to a connecting block, the connecting block is penetrated by a support rod, the support rod is fixedly connected to the inner wall of the through groove, the bottom end of the connecting block is fixedly connected to a moving block, and the moving block is sleeved on a standard screw rod; The synchronization mechanism includes a standard screw rod, the left side of the standard screw rod is rotatably connected to the inner wall of the bottom shell, the right side of the standard screw rod is fixedly connected to a handle, the handle passes through the right side of the bottom shell, the right side of the standard screw rod is sleeved with a driving gear, the top end of the driving gear is meshed with a connecting gear, the connecting gear is rotatably connected to the flat plate, the top end of the connecting gear is meshed with a driven gear, the driven gear is sleeved with a rubber ring, the rubber ring is sleeved on the screw rod to be tested, the driven gear is rotatably connected to the second support frame, the left side of the screw rod to be tested is abutted against the first support frame, and the bottom end of the second support frame is fixedly connected to the flat plate; The detection mechanism includes two groups of abutment plates, one side of the abutment plate contacts with the screw nut, and the bottom end of the abutment plate is slidably connected to the sliding groove, and the sliding groove is opened at the top of the collection box, and the bottom end of the abutment plate is fixedly connected to the movable rack, and the movable rack is inserted on the fixed rod, and the fixed rod is fixedly connected to the inner wall of the cavity, and the cavity is opened inside the collection box. There are two groups of cavities and the two groups of cavities are not connected, one side of the movable rack contacts with the support spring, and the support spring is sleeved on the fixed rod, and the side of the support spring away from the movable rack is fixedly connected to the inner wall of the cavity, and the movable rack meshes with the rotating gear, and the rotating gear is rotatably connected to the inside of the cavity, and the bottom end of the rotating gear is fixedly connected to the dial, and the dial is rotatably connected to the inside of the rotating groove, and the rotating groove is opened inside the collection box.

2. The tool for detecting the smoothness of a screw rod of an automobile according to claim 1, characterized in that: The first support frame is slidably connected to the inside of the groove, the bottom end of the first support frame passes through the bottom end of the inner wall of the groove, and one side of the first support frame abuts against the screw.

3. The tool for detecting the smoothness of a screw rod of an automobile according to claim 1, characterized in that: The bottom end of the bottom plate is fixedly connected with four groups of pulleys, and the pulleys are slidably connected to the slide grooves, and the slide grooves are arranged on the top of the flat plate.

4. The tool for detecting the smoothness of a screw rod of an automobile according to claim 1, characterized in that: The bottom end of the collection box is fixedly connected with two sets of fixing plates, which are slidably connected to the guide grooves. The guide grooves are arranged at the top of the bottom plate. The top of the bottom plate is fixedly connected with a magnet, which is attracted to the bottom end of the collection box.

5. The tool for detecting the smoothness of a screw rod of an automobile according to claim 4, characterized in that: A movable groove is provided at the bottom of the collection box, a fixed spring is fixedly connected to the inner wall of the movable groove, the bottom end of the fixed spring is fixedly connected to the ball, the bottom end of the ball is clamped in the clamping groove, and the clamping groove is provided at the top of the bottom plate.

6. The tool for detecting the smoothness of a screw rod of an automobile according to claim 1, characterized in that: Two sets of support blocks are fixedly connected to one side of the bottom end of the connector, the support blocks are in contact with the screw nut, and a pad is fixedly connected to the middle of the bottom end of the connector, the pad is made of rubber material.

7. The tool for detecting the smoothness of a screw rod of an automobile according to claim 1, characterized in that: Two groups of sliding blocks are fixedly connected to the connecting rod. The sliding blocks are slidably connected in the long grooves, and the long grooves are arranged on the supporting plate.

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