Device for measuring OBD value of ball screw and nut

Abstract

The invention provides a device for measuring OBD values of a ball screw and a nut. The device comprises a main supporting plate; the thrust mechanism comprises an air cylinder and a sliding assembly, the output end of the air cylinder is connected with the sliding assembly, and the air cylinder and the sliding assembly are both arranged on the main supporting plate; the limiting mechanism is arranged on the sliding assembly; the clamping mechanism is arranged on the sliding assembly; the measuring mechanism is arranged on the sliding assembly, the measuring mechanism comprises a displacement sensor and a measuring head structure, one end of the displacement sensor is connected with the measuring head structure, the measuring head structure comprises a measuring head assembly, and the measuring head assembly comprises a lead screw measuring head assembly and a nut measuring head assembly; the servo mechanism comprises a servo motor and a transmission mechanism, the output end of the servo motor is connected with the other end of the displacement sensor, the measuring mechanism is connected with the transmission mechanism, through the arrangement of the screw rod measuring head assembly and the nut measuring head assembly, the OBD value of the screw rod and the OBD value of the nut can be measured at the same time, the structure is simple, and the measuring precision is high.

Description

Technical Field

[0001] The present invention relates to the field of technical clearance measuring devices, and in particular to a device for measuring OBD values ​​of a ball screw and a nut. Background Art

[0002] A typical ball screw pair consists of a screw, a nut and a steel ball. The ball screw pair is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotational motion into linear motion, or to convert torque into axial repetitive force. It has the advantages of high precision, reversibility and high efficiency. In the production process of the ball screw, the most critical issue is how the steel ball contacts the contour of the double arc pointed arch and the exact position of the contact point. If the size and position of the steel ball are not well controlled, interference will occur in the ball screw, which will lead to uncontrollable damage to the ball screw during use. Therefore, it is necessary to obtain the OBD value of the ball screw and the OBD value of the ball nut through measurement. Summary of the invention

[0003] Therefore, the problem to be solved by the present invention is how to provide a device for measuring the OBD value of a ball screw and a nut.

[0004] To solve the above problems, the present invention provides a device for measuring the OBD value of a ball screw and a nut, comprising: a main support plate; a thrust mechanism, the thrust mechanism comprising a cylinder and a sliding assembly, the output end of the cylinder is connected to the sliding assembly, and the cylinder and the sliding assembly are both arranged on the main support plate; a limit mechanism, the limit mechanism is arranged on the sliding assembly; a clamping mechanism, the clamping mechanism is arranged on the sliding assembly; a measuring mechanism, the measuring mechanism is arranged on the sliding assembly, the measuring mechanism comprises a displacement sensor and a probe structure, one end of the displacement sensor is connected to the probe structure, the probe structure comprises a probe assembly, the probe assembly comprises a screw probe assembly and a nut probe assembly; a servo mechanism, the servo mechanism comprises a servo motor and a transmission mechanism, the output end of the servo motor is connected to the other end of the displacement sensor, and the measuring mechanism is connected to the transmission mechanism.

[0005] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the main support plate is used to place the thrust mechanism, the limit mechanism, the clamping mechanism, the measuring mechanism and the servo mechanism; the limit mechanism and the clamping mechanism are both arranged on the sliding assembly, the cylinder can be used to drive the sliding assembly to slide, the extension and retraction of the cylinder can drive the sliding of the limit mechanism and the clamping mechanism, and the OBD values ​​of screw rods of different lengths can be measured; the servo motor is used to drive the displacement sensor, and the transmission mechanism drives the movement of the probe assembly, and through the mutual cooperation of the servo motor and the transmission assembly, any position of the thread of the ball screw and the nut can be measured; the probe assembly includes a screw probe assembly and a nut probe assembly, which can realize the simultaneous measurement of the OBD values ​​of the screw rod and the nut, thereby improving the measurement efficiency.

[0006] Furthermore, the sliding assembly includes: a first slide rail; a sliding block, a first groove is provided at one end of the sliding block, the first groove matches the shape of the first slide rail, and the sliding block can be slidably connected to the first slide rail; a first support plate, a first end surface of the first support plate is connected to the other end surface of the sliding block; a second support plate, one end surface of the second support plate is connected to the other end surface of the first support plate.

[0007] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the sliding block can be slidably assembled on the first sliding rail, and the movement of the sliding block is driven by the extension and contraction of the cylinder to promote the sliding of the limiting mechanism and the clamping mechanism, thereby realizing the measurement of the OBD value of the screw rods with different lengths; the first support plate and the second support plate are used to support the limiting mechanism and the clamping mechanism, and the first support plate and the second support plate are arranged on the sliding block, so that the limiting mechanism and the clamping mechanism can move with the movement of the sliding block.

[0008] Furthermore, the limiting mechanism includes: a first limiting plate, the first limiting plate is connected to the other end surface of the second support plate, the first end side wall of the first limiting plate is provided with a first reinforcing rib, and the second end side wall of the first limiting plate is connected to the output end of the cylinder; a limiting block, the limiting block is provided on the upper surface of the first reinforcing rib, the side wall of one end of the limiting block is connected to the first end side wall of the first limiting plate, the limiting block is provided with a second groove, and the side wall of the second groove is against the side wall of the first end of the screw rod.

[0009] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the setting of the first reinforcing rib on the first end side wall of the first limit plate can stabilize the first limit plate, the limit block is set on the upper surface of the first reinforcing rib, the first reinforcing rib plays a role in supporting the limit plate, the second groove is used to place the screw rod, the first end side wall of the screw rod is abutted against the inner side wall of the second groove, so as to prevent the screw rod from causing errors in the measurement result due to unstable fixation during the measurement of the OBD value.

[0010] Furthermore, the clamping mechanism includes: a fastener; a clamping block, which is arranged on the second supporting plate, a third groove is provided at the upper end of the clamping block, a first through hole is provided at one end of the third groove, and the fastener passes through the first through hole and abuts against the side wall of the screw rod for clamping; a second limiting plate, which is arranged on the side wall of the clamping block, a first limiting groove is provided in the middle of one end of the second limiting plate, and the inner side wall of the first limiting groove abuts against the side wall of the screw rod.

[0011] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the third groove is used to place the screw rod, a through hole is set at one end of the third groove, and the fastener passes through the through hole and abuts against the side wall of the screw rod, which enables the screw rod to be firmly fixed on the clamping block, and the setting of the first limiting groove in the middle part of the second limiting plate, and the screw rod is placed in the first limiting groove, can play a supporting role for the screw rod.

[0012] Furthermore, the limiting mechanism also includes: a third limiting plate, a second through hole is provided at the first end of the third limiting plate, the servo mechanism is connected to the measuring mechanism through the second through hole, a second limiting groove is provided on the first side wall of the second end of the third limiting plate, and the inner side wall of the second limiting groove is abutted against the second end of the screw rod; a second reinforcing rib, the second reinforcing rib is provided on the second side wall of the second end of the third limiting plate, and the second reinforcing rib is used to support and fix the third limiting plate.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the inner side wall of the second limiting groove of the first side wall of the second end of the third limiting plate abuts against the second end of the screw to fix the end of the screw, thereby avoiding measurement errors caused by loose fixation of the screw during the measurement process; the second reinforcing rib is used to support and stabilize the third limiting plate, thereby indirectly fixing the screw; in addition, a second through hole is provided at one end of the third limiting plate, and the servo mechanism is connected to the measuring mechanism through the through hole, so as to facilitate the measurement of the OBD value of the thread at any position of the screw.

[0014] Furthermore, the transmission mechanism includes: a second slide rail; a sliding chain, the sliding chain can be slidably arranged on the second slide rail, and the sliding chain is connected to the measuring mechanism.

[0015] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the sliding chain can be slidably arranged on the second sliding rail, and the sliding chain and the measuring mechanism, so that the measuring mechanism can measure the OBD value of the thread at any position of the screw rod.

[0016] Furthermore, the probe structure also includes: a probe fixing assembly, which is connected to the sliding chain; and the probe fixing assembly is arranged on the first slide rail.

[0017] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the probe fixing assembly is used to fix the probe assembly, by connecting the probe fixing assembly to the sliding chain, and arranging the probe fixing assembly on the first slide rail, the movement of the sliding chain can drive the movement of the probe fixing assembly, so as to push the probe assembly to measure the OBD value of the thread at any position of the screw rod.

[0018] Furthermore, the probe fixing assembly includes: a first connecting rod, a second connecting rod, the first end of the first connecting rod is connected to the first end of the second connecting rod by a first swing hinge, the second end side wall of the second connecting rod is provided with a first screw, and the side wall of the first screw is at a certain distance from the first side wall of the first connecting rod; a third connecting rod, a fourth connecting rod, the first end of the third connecting rod is connected to the first end of the fourth connecting rod by a second swing hinge, the second end side wall of the fourth connecting rod is provided with a second screw, and the side wall of the second screw is at a certain distance from the first side wall of the third connecting rod; a fifth connecting rod, a sixth connecting rod, the first end of the fifth connecting rod is connected to the first end of the sixth connecting rod by a third swing hinge, the second end side wall of the sixth connecting rod is provided with a third screw, and the side wall of the third screw is at a certain distance from the first side wall of the fifth connecting rod; a seventh connecting rod, an eighth connecting rod, the first end of the seventh connecting rod is connected to the first end of the eighth connecting rod by a fourth swing hinge, the second end side wall of the eighth connecting rod is provided with a fourth screw, and the side wall of the fourth screw is at a certain distance from the first side wall of the seventh connecting rod.

[0019] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: by adopting swing hinges to connect the first connecting rod and the second connecting rod, the third connecting rod and the fourth connecting rod, the fifth connecting rod and the sixth connecting rod, and the seventh connecting rod and the eighth connecting rod, and by using screws to fix the second connecting rod, the fourth connecting rod, the sixth connecting rod and the eighth connecting rod, the swing of the first connecting rod, the third connecting rod, the fifth connecting rod and the seventh connecting rod can be realized, thereby realizing the floating measurement of the measuring head, eliminating the theoretical error, and obtaining higher measurement accuracy.

[0020] Furthermore, the screw probe assembly includes: a first probe, which is detachably mounted on the second side wall of the first connecting rod; a second probe, which is detachably mounted on the second side wall of the third connecting rod; and a third probe, which is detachably mounted on the second side wall of the third connecting rod; wherein, the shape of one end of the first probe, the second probe and the third probe is annular and has the same size as the steel ball, the first probe is located on the first side of the screw, and the second probe and the third probe are located on the second side of the screw.

[0021] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the first probe is used to measure the pitch of the thread in the screw, the second probe and the third probe are used to measure the lead of the thread of the screw, the shape of one end of the first probe, the second probe and the third probe is annular, the end size is the same as the size of the steel ball, and the first probe, the second probe and the third probe are all detachable, that is, the OBD value of the screw is measured by using the first probe, the second probe and the third probe to obtain a steel ball of appropriate size.

[0022] Furthermore, the nut probe assembly includes: a fourth probe, which is detachably mounted on the side wall of one end of the fifth connecting rod; a fifth probe, which is detachably mounted on the side wall of one end of the seventh connecting rod; and a sixth probe, which is detachably mounted on the side wall of one end of the seventh connecting rod; wherein, the shape of one end of the fourth probe, the fifth probe and the sixth probe is annular and has the same size as the steel ball, the fourth probe is located on the first side inside the nut, and the fifth probe and the sixth probe are located on the second side inside the nut.

[0023] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fourth probe is used to measure the pitch of the thread in the nut, the fifth probe and the sixth probe are used to measure the lead of the thread of the nut, the shape of one end of the fourth probe, the fifth probe and the sixth probe are all annular, the end size is the same as the size of the steel ball, and the fourth probe, the fifth probe and the sixth probe are all detachable, that is, the OBD value of the nut is measured by using the fourth probe, the fifth probe and the sixth probe to obtain a steel ball of appropriate size.

[0024] After adopting the technical solution of the present invention, the following technical effects can be achieved: (1) The device for measuring the OBD value of a ball screw and a nut of the present invention comprises a main support plate for placing a thrust mechanism, a limit mechanism, a clamping mechanism, a measuring mechanism and a servo mechanism; the limit mechanism and the clamping mechanism are both arranged on a sliding assembly, and a cylinder can be used to drive the sliding assembly to slide, and the extension and retraction of the cylinder can drive the limit mechanism and the clamping mechanism to slide, so that the OBD values ​​of screws of different lengths can be measured; a servo motor is used to drive a displacement sensor, and a transmission mechanism drives the movement of a probe assembly, and through the cooperation between the servo motor and the transmission assembly, any position of the thread of the ball screw and the nut can be measured; the probe assembly comprises a screw probe assembly and a nut probe assembly, so that the OBD values ​​of the screw and the nut can be measured simultaneously, thereby improving the measurement efficiency.

[0025] (2) The device for measuring the OBD value of a ball screw and a nut of the present invention can eliminate theoretical errors through the floating setting of the probe, so that the measurement result has a higher measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A structural diagram of a first embodiment of the present invention.

[0027] Description of reference numerals: 100, main support plate; 210, cylinder; 222, sliding block; 224, first support plate; 225, second support plate; 310, first limit plate; 320, first reinforcing rib; 330, limit block; 350, third limit plate; 360, second reinforcing rib; 410, fastener; 420, clamping block; 510, displacement sensor; 520, probe structure; 610, servo motor. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1 , which is a device for measuring OBD value of ball screw and nut provided by this embodiment, including: main support plate 100; thrust mechanism, the thrust mechanism includes cylinder 210 and sliding assembly, the output end of cylinder 210 is connected to sliding assembly, cylinder 210 and sliding assembly are both arranged on main support plate 100; limit mechanism, the limit mechanism is arranged on sliding assembly; clamping mechanism, the clamping mechanism is arranged on sliding assembly; measuring mechanism, the measuring mechanism is arranged on sliding assembly, the measuring mechanism includes displacement sensor 510 and probe structure 520, one end of displacement sensor 510 is connected to probe structure 520, probe structure 520 includes probe assembly, probe assembly includes screw probe assembly and nut probe assembly; servo mechanism, the servo mechanism includes servo motor 610 and transmission mechanism, the output end of servo motor 610 is connected to the other end of displacement sensor 510, and the measuring mechanism is connected to transmission mechanism.

[0030] In this embodiment, the main support plate 100 is used to place the thrust mechanism, the limit mechanism, the clamping mechanism, the measuring mechanism and the servo mechanism; the limit mechanism and the clamping mechanism are both arranged on the sliding assembly, and the cylinder 210 can be used to drive the sliding assembly to slide, and the extension and retraction of the cylinder 210 can drive the sliding of the limit mechanism and the clamping mechanism, so as to realize the measurement of the OBD values ​​of screw rods of different lengths; the probe assembly includes a screw probe assembly and a nut probe assembly, so as to realize the simultaneous measurement of the OBD values ​​of the screw rod and the nut, thereby improving the measurement efficiency; the servo motor 610 is used to drive the displacement sensor 510, and the transmission mechanism drives the movement of the probe assembly. Through the mutual cooperation between the servo motor 610 and the transmission assembly, it is possible to measure any position of the thread of the ball screw and the nut.

[0031] In a specific embodiment, the sliding assembly includes: a first slide rail; a sliding block 222, a first groove is provided at one end of the sliding block 222, the first groove matches the shape of the first slide rail, and the sliding block 222 can be slidably connected to the first slide rail; a first support plate 224, a first end surface of the first support plate 224 is connected to the other end surface of the sliding block 222; a second support plate 225, one end surface of the second support plate 225 is connected to the other end surface of the first support plate 224.

[0032] It should be noted that the sliding block 222 can be slidably assembled on the first sliding rail, and the movement of the sliding block 222 is driven by the extension and contraction of the cylinder 210 to promote the sliding of the limiting mechanism and the clamping mechanism, thereby realizing the measurement of the OBD value of the screw rods of different lengths; the first support plate 224 and the second support plate 225 are used to support the limiting mechanism and the clamping mechanism, and the first support plate 224 and the second support plate 225 are arranged on the sliding block 222, so that the limiting mechanism and the clamping mechanism can move with the movement of the sliding block 222.

[0033] In a specific embodiment, the limiting mechanism includes: a first limiting plate 310, the first limiting plate 310 is connected to the other end surface of the second support plate 225, the first end side wall of the first limiting plate 310 is provided with a first reinforcing rib 320, and the second end side wall of the first limiting plate 310 is connected to the output end of the cylinder 210; a limiting block 330, the limiting block 330 is provided on the upper surface of the first reinforcing rib 320, the side wall of one end of the limiting block 330 is connected to the first end side wall of the first limiting plate 310, the limiting block 330 is provided with a second groove, and the side wall of the second groove is against the side wall of the first end of the screw rod.

[0034] It should be noted that the setting of the first reinforcing rib 320 on the first end side wall of the first limit plate 310 can stabilize the first limit plate 310. The limit block 330 is set on the upper surface of the first reinforcing rib 320. The first reinforcing rib 320 plays a role in supporting the limit plate. The second groove is used to place the screw rod. The first end side wall of the screw rod is against the inner side wall of the second groove to prevent the screw rod from causing errors in the measurement result due to unstable fixation during the measurement of the OBD value.

[0035] In a specific embodiment, the clamping mechanism includes: a fastener 410; a clamping block 420, the clamping block 420 is arranged on the second support plate 225, a third groove is provided at the upper end of the clamping block 420, a first through hole is provided at one end of the third groove, the fastener 410 passes through the first through hole and is abutted against the side wall of the screw rod for clamping; a second limiting plate, the second limiting plate is arranged on the side wall of the clamping block 420, a first limiting groove is provided in the middle of one end of the second limiting plate, and the inner side wall of the first limiting groove is abutted against the side wall of the screw rod.

[0036] It should be noted that the third groove is used to place the screw rod. A through hole is set at one end of the third groove. The fastener 410 passes through the through hole and abuts against the side wall of the screw rod, which enables the screw rod to be firmly fixed on the clamping block 420. The setting of the first limiting groove in the middle part of the second limiting plate and the placement of the screw rod in the first limiting groove can play a supporting role for the screw rod.

[0037] In a specific embodiment, the limiting mechanism also includes: a third limiting plate 350, a second through hole is provided at the first end of the third limiting plate 350, the servo mechanism is connected to the measuring mechanism through the second through hole, a second limiting groove is provided on the first side wall of the second end of the third limiting plate 350, and the inner side wall of the second limiting groove is abutted against the second end of the screw rod; a second reinforcing rib 360, the second reinforcing rib 360 is provided on the second side wall of the second end of the third limiting plate 350, and the second reinforcing rib 360 is used to support and fix the third limiting plate 350.

[0038] It should be noted that the inner side wall of the second limiting groove of the first side wall at the second end of the third limiting plate 350 abuts against the second end of the screw to fix the end of the screw and avoid measurement errors caused by loose fixation of the screw during the measurement process. The second reinforcing rib 360 is used to support and stabilize the third limiting plate 350 and indirectly fix the screw. In addition, a second through hole is provided at one end of the third limiting plate 350, and the servo mechanism is connected to the measuring mechanism through the through hole to facilitate the measurement of the OBD value of the thread at any position of the screw.

[0039] In a specific embodiment, the transmission mechanism includes: a second slide rail; a sliding chain, the sliding chain is slidably arranged on the second slide rail, and the sliding chain is connected to the measuring mechanism.

[0040] It should be noted that the sliding chain can be slidably disposed on the second sliding rail, and the sliding chain and the measuring mechanism, so that the measuring mechanism can measure the OBD value of the thread at any position of the screw rod.

[0041] In a specific embodiment, the probe structure 520 further includes: a probe fixing assembly, the probe fixing assembly is connected to the sliding chain; and the probe fixing assembly is arranged on the first slide rail.

[0042] It should be noted that the probe fixing assembly is used to fix the probe assembly. By connecting the probe fixing assembly to the sliding chain and arranging the probe fixing assembly on the first slide rail, the movement of the sliding chain can drive the movement of the probe fixing assembly to push the probe assembly to measure the OBD value of the thread at any position of the screw rod.

[0043] In a specific embodiment, the probe fixing assembly includes: a first connecting rod, a first connecting rod, the first end of the first connecting rod is connected to the first end of the first connecting rod through a first swing hinge, the second end side wall of the first connecting rod is provided with a first screw, and the first screw side wall is at a certain distance from the first side wall of the first connecting rod; a third connecting rod, a fourth connecting rod, the first end of the third connecting rod is connected to the first end of the fourth connecting rod through a second swing hinge, the second end side wall of the fourth connecting rod is provided with a second screw, and the second screw side wall is at a certain distance from the first side wall of the third connecting rod; a fifth connecting rod, a sixth connecting rod, the first end of the fifth connecting rod is connected to the first end of the sixth connecting rod through a third swing hinge, the second end side wall of the sixth connecting rod is provided with a third screw, and the third screw side wall is at a certain distance from the first side wall of the fifth connecting rod; a seventh connecting rod, an eighth connecting rod, the first end of the seventh connecting rod is connected to the first end of the eighth connecting rod through a fourth swing hinge, the second end side wall of the eighth connecting rod is provided with a fourth screw, and the fourth screw side wall is at a certain distance from the first side wall of the seventh connecting rod.

[0044] It should be noted that, by using swing hinges to connect the first link and the first link, the third link and the fourth link, the fifth link and the sixth link, and the seventh link and the eighth link, and fixing the first link, the fourth link, the sixth link and the eighth link with screws, the first link, the third link, the fifth link and the seventh link can be swung, thereby realizing floating measurement of the probe, eliminating theoretical errors, and obtaining higher measurement accuracy.

[0045] In a specific embodiment, the screw probe assembly includes: a first probe, which is detachably mounted on the second side wall of the first connecting rod; a second probe, which is detachably mounted on the second side wall of the third connecting rod; and a third probe, which is detachably mounted on the second side wall of the third connecting rod; wherein the shape of one end of the first probe, the second probe and the third probe is annular and has the same size as the steel ball, the first probe is located on the first side of the screw, and the second probe and the third probe are located on the second side of the screw.

[0046] It should be noted that the first probe is used to measure the pitch of the thread in the screw, the second probe and the third probe are used to measure the lead of the thread of the screw, the shape of one end of the first probe, the second probe and the third probe are all annular, the end size is the same as the size of the steel ball, and the first probe, the second probe and the third probe are all detachable, that is, the OBD value of the screw is measured by using the first probe, the second probe and the third probe to obtain a steel ball of appropriate size.

[0047] In a specific embodiment, the nut probe assembly includes: a fourth probe, which is detachably mounted on the side wall of one end of the fifth connecting rod; a fifth probe, which is detachably mounted on the side wall of one end of the seventh connecting rod; and a sixth probe, which is detachably mounted on the side wall of one end of the seventh connecting rod; wherein the shape of one end of the fourth probe, the fifth probe and the sixth probe is annular and has the same size as the steel ball, the fourth probe is located on the first side inside the nut, and the fifth probe and the sixth probe are located on the second side inside the nut.

[0048] It should be noted that the fourth probe is used to measure the pitch of the thread in the nut, the fifth probe and the sixth probe are used to measure the lead of the thread of the nut, the shape of one end of the fourth probe, the fifth probe and the sixth probe are all annular, the end size is the same as the size of the steel ball, and the fourth probe, the fifth probe and the sixth probe are all detachable, that is, the OBD value of the nut is measured by using the fourth probe, the fifth probe and the sixth probe to obtain a steel ball of appropriate size.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring OBD value using a ball screw and a nut, characterized in that: include: Main pallet; A thrust mechanism, the thrust mechanism comprising a cylinder and a sliding assembly, the output end of the cylinder is connected to the sliding assembly, and the cylinder and the sliding assembly are both arranged on the main support plate; A limiting mechanism, wherein the limiting mechanism is arranged on the sliding assembly; A clamping mechanism, wherein the clamping mechanism is disposed on the sliding assembly; A measuring mechanism, the measuring mechanism is arranged on the sliding assembly, the measuring mechanism comprises a displacement sensor and a probe structure, one end of the displacement sensor is connected to the probe structure, the probe structure comprises a probe assembly, and the probe assembly comprises a screw probe assembly and a nut probe assembly; The servo mechanism comprises a servo motor and a transmission mechanism, the output end of the servo motor is connected to the other end of the displacement sensor, and the measuring mechanism is connected to the transmission mechanism.

2. The device for measuring OBD value using a ball screw and a nut according to claim 1, characterized in that: The sliding assembly comprises: First slide rail; A sliding block, wherein a first groove is provided at one end of the sliding block, the first groove matches the shape of the first slide rail, and the sliding block can be slidably connected to the first slide rail; a first supporting plate, wherein a first end surface of the first supporting plate is connected to the other end surface of the sliding block; A second support plate, wherein one end surface of the second support plate is connected to the other end surface of the first support plate.

3. The device for measuring OBD value using a ball screw and a nut according to claim 2, characterized in that: The limiting mechanism comprises: A first limit plate, wherein the first limit plate is connected to the other end surface of the second support plate, a first end side wall of the first limit plate is provided with a first reinforcing rib, and a second end side wall of the first limit plate is connected to the output end of the cylinder; A limit block is arranged on the upper surface of the first reinforcing rib, a side wall of one end of the limit block is connected to the side wall of the first end of the first limit plate, and the limit block is provided with a second groove, and the side wall of the second groove is against the side wall of the first end of the screw rod.

4. The device for measuring OBD value using a ball screw and a nut according to claim 2, characterized in that: The clamping mechanism comprises: fastener; A clamping block, the clamping block is arranged on the second supporting plate, a third groove is arranged on the upper end of the clamping block, a first through hole is arranged at one end of the third groove, and the fastener passes through the first through hole and abuts against and clamps the side wall of the screw rod; A second limiting plate, wherein the second limiting plate is arranged on the side wall of the clamping block, a first limiting groove is arranged in the middle of one end of the second limiting plate, and an inner side wall of the first limiting groove abuts against a side wall of the screw rod.

5. The device for measuring OBD value using a ball screw and a nut according to claim 2, characterized in that: The limiting mechanism also includes: A third limiting plate, wherein a second through hole is provided at the first end of the third limiting plate, the servo mechanism is connected to the measuring mechanism through the second through hole, a second limiting groove is provided on the first side wall at the second end of the third limiting plate, and an inner side wall of the second limiting groove abuts against the second end of the screw rod; A second reinforcing rib is provided on the second side wall of the second end of the third limiting plate, and the second reinforcing rib is used to support and fix the third limiting plate.

6. The device for measuring OBD value using a ball screw and a nut according to claim 2, characterized in that: The transmission mechanism comprises: Second slide rail; A sliding chain, the sliding chain can be slidably arranged on the second slide rail, and the sliding chain is connected to the measuring mechanism.

7. The device for measuring OBD value using a ball screw and a nut according to claim 6, characterized in that: The probe structure also includes: A probe fixing assembly is connected to the sliding chain; the probe fixing assembly is arranged on the first slide rail.

8. The device for measuring OBD value using a ball screw and a nut according to claim 7, characterized in that: The probe fixing assembly comprises: A first connecting rod and a second connecting rod, wherein the first end of the first connecting rod is connected to the first end of the second connecting rod through a first swing hinge, a first screw is disposed on a side wall of the second end of the second connecting rod, and a certain distance exists between the side wall of the first screw and the first side wall of the first connecting rod; A third connecting rod and a fourth connecting rod, wherein the first end of the third connecting rod is connected to the first end of the fourth connecting rod through a second swing hinge, a second screw is disposed on the side wall of the second end of the fourth connecting rod, and a certain distance is formed between the side wall of the second screw and the first side wall of the third connecting rod; A fifth connecting rod and a sixth connecting rod, wherein the first end of the fifth connecting rod is connected to the first end of the sixth connecting rod through a third swing hinge, a third screw is disposed on the side wall of the second end of the sixth connecting rod, and a certain distance is formed between the side wall of the third screw and the first side wall of the fifth connecting rod; A seventh connecting rod and an eighth connecting rod, wherein the first end of the seventh connecting rod is connected to the first end of the eighth connecting rod via a fourth swing hinge, a fourth screw is disposed on the second end side wall of the eighth connecting rod, and a certain distance exists between the fourth screw side wall and the first side wall of the seventh connecting rod.

9. The device for measuring OBD value using a ball screw and a nut according to claim 8, characterized in that: The screw probe assembly comprises: A first measuring head, wherein the first measuring head is detachably mounted on the second side wall of the first connecting rod; a second measuring head, the second measuring head being detachably mounted on the second side wall of the third connecting rod; A third measuring head, the third measuring head is detachably mounted on the second side wall of the third connecting rod; Among them, the shapes of one ends of the first probe, the second probe and the third probe are ring-shaped and have the same size as the steel ball. The first probe is located on the first side of the screw rod, and the second probe and the third probe are located on the second side of the screw rod.

10. The device for measuring OBD value using a ball screw and a nut according to claim 8, characterized in that: The nut probe assembly comprises: A fourth measuring head, the fourth measuring head is detachably mounted on a side wall of one end of the fifth connecting rod; a fifth measuring head, the fifth measuring head being detachably mounted on a side wall of one end of the seventh connecting rod; a sixth measuring head, the sixth measuring head being detachably mounted on a side wall of one end of the seventh connecting rod; Among them, the shape of one end of the fourth probe, the fifth probe and the sixth probe is annular and has the same size as the steel ball. The fourth probe is located on the first side inside the nut, and the fifth probe and the sixth probe are located on the second side inside the nut.

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