Inner hole groove diameter measuring device

Abstract

The invention discloses an inner hole groove diameter measuring device, which comprises a measuring instrument, a guide sleeve, a transmission rod, a driving mechanism and a measuring head mechanism, and is characterized in that the measuring instrument is mounted on the guide sleeve; the transmission rod is positioned in the guide sleeve; a measuring rod of the measuring instrument is connected with the transmission rod; the driving mechanism is used for driving the transmission rod to move along the axis direction so as to drive the measuring rod to move; the measuring head mechanism comprises a connecting rod, a measuring head and an end cover, the end cover is connected with the guide sleeve, the measuring head is connected with the end cover through a sliding assembly, and the measuring head is hinged to the transmission rod through the connecting rod. During use, the driving mechanism drives the transmission rod to move, the transmission rod pushes the connecting rod to move, the connecting rod pushes the measuring head to slide out of the measuring hole through the sliding assembly, so that the measuring head extends into the inner hole groove to reach the maximum extension amount, and the measured value of the measuring instrument is the diameter of the inner hole groove. According to the inner hole groove diameter measuring device, the size of the inner hole groove is captured through mechanical linkage, displacement information of the measuring head is converted into displacement of the transmission rod, and accurate measurement of the diameter of the inner hole groove is achieved.

Description

Technical Field

[0001] The present application relates to the field of measurement and calibration technology, and in particular to an inner hole groove diameter measuring device. Background Art

[0002] In the manufacturing process of cylinder heads, the effectiveness of the sealing ring is crucial to ensure the airtightness of the cylinder head. The sealing ring is usually installed in the inner groove of the cylinder head, and the measurement accuracy of the inner groove diameter will affect the effectiveness of the sealing ring.

[0003] Therefore, how to improve the accuracy of measuring the diameter of the inner hole groove of the cylinder head has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The present application proposes an inner hole groove diameter measuring device to improve the accuracy of measuring the diameter of the inner hole groove of a cylinder head.

[0005] In order to achieve the above object, the present application provides an inner hole groove diameter measuring device, comprising:

[0006] Measuring instruments;

[0007] A guide sleeve on which the measuring instrument is mounted;

[0008] A transmission rod is installed in the guide sleeve, and a first end of the transmission rod is connected to a measuring rod of the measuring instrument;

[0009] A driving mechanism, connected to the transmission rod, and used to drive the transmission rod to move along its own axis direction;

[0010] The probe mechanism includes a connecting rod, a probe and an end cover, wherein the first end of the connecting rod is hinged to the second end of the transmission rod, the second end of the connecting rod is hinged to the probe, the probe is connected to the end cover via a sliding assembly, the sliding direction of the sliding assembly is perpendicular to the axial direction of the transmission rod, and the end cover is connected to the guide sleeve and has a measuring hole for the probe to extend out.

[0011] Preferably, in the above-mentioned inner hole groove diameter measuring device, the guide sleeve includes an upper guide sleeve and a lower guide sleeve, and the transmission rod includes an upper transmission rod and a lower transmission rod.

[0012] The measuring instrument is installed on the upper guide sleeve, the upper guide sleeve is sleeved on the upper transfer rod, the first end of the upper transfer rod is connected to the measuring rod, and the second end of the upper transfer rod is connected to the driving mechanism;

[0013] The lower guide sleeve is connected to the end cover, the lower transfer rod is arranged in the lower guide sleeve, the first end of the lower transfer rod is connected to the upper transfer rod through a first spring, and the second end of the lower transfer rod is connected to the connecting rod.

[0014] Preferably, in the above-mentioned inner hole groove diameter measuring device, the driving mechanism comprises:

[0015] A driving block, fixedly connected to the upper transfer rod;

[0016] A sliding sleeve is sleeved on the upper transfer rod, a first end of the sliding sleeve abuts against the driving block, a second end of the sliding sleeve is slidably connected to the lower guide sleeve, and a second end of the sliding sleeve is connected to the first spring.

[0017] Preferably, in the above-mentioned inner hole groove diameter measuring device, the driving block is connected to the upper transmission rod through a thread.

[0018] Preferably, in the above-mentioned inner hole groove diameter measuring device, the second end of the sliding sleeve has a limit plate arranged along the circumference of the sliding sleeve.

[0019] It also includes a compression sleeve mounted on the sliding sleeve, the compression sleeve has a compression plate abutting against the end surface of the limit plate close to the upper guide sleeve, the sliding sleeve and the compression sleeve are slidably matched, and the compression sleeve is fixedly connected to the lower guide sleeve.

[0020] Preferably, in the above-mentioned inner hole groove diameter measuring device, the transmission rod and the measuring rod are connected via a second spring.

[0021] Preferably, in the above-mentioned inner hole groove diameter measuring device, the sliding assembly includes a sliding groove and a guide block, and the sliding groove and the guide block are slidably matched.

[0022] The guide block is disposed on one of the probe and the end cover, and the guide block is disposed on the other of the probe and the end cover.

[0023] Preferably, in the above-mentioned inner hole groove diameter measuring device, the groove wall of the slide groove has a limiting convex strip, and the guide block has a limiting groove cooperating with the limiting convex strip, which is used to limit the probe along the axial direction of the guide sleeve.

[0024] Preferably, in the above-mentioned inner hole groove diameter measuring device, a guide column is provided at the lower end of the transmission rod.

[0025] The end cover is located between the two measuring heads and has a guide block, and a guide hole matched with the guide column is arranged in the guide block.

[0026] Preferably, in the above-mentioned inner hole groove diameter measuring device, a clamping sleeve is provided on the guide sleeve, and the clamping sleeve is used to fix the measuring instrument.

[0027] The inner hole groove diameter measuring device provided by the embodiment of the present application includes a measuring instrument, a guide sleeve, a transmission rod, a driving mechanism and a probe mechanism, wherein the measuring instrument is installed on the guide sleeve; the transmission rod is located in the guide sleeve, and the measuring rod of the measuring instrument is connected to the first end of the transmission rod; the driving mechanism is connected to the transmission rod, and is used to drive the transmission rod to move along its own axis direction, thereby driving the measuring rod to move; the probe mechanism includes a connecting rod, a probe and an end cover, the end cover is connected to the guide sleeve, the probe is connected to the end cover through a sliding assembly, the sliding direction of the probe is perpendicular to the axis direction of the transmission rod, the first end of the connecting rod is hinged to the second end of the transmission rod, the second end of the connecting rod is hinged to the probe, and the end cover has a measuring hole for the probe to extend. When in use, the driving mechanism drives the transmission rod to move in a direction away from the measuring instrument, the transmission rod pushes the connecting rod to move, and the connecting rod pushes the probe to slide out of the measuring hole through the sliding assembly, so that the probe extends into the inner hole groove to reach the maximum extension amount, and the measurement value of the measuring instrument is the inner hole groove diameter. The inner hole groove diameter measuring device disclosed in the present scheme captures the size information of the inner hole groove through mechanical linkage, converts the displacement information of the probe into the displacement of the transmission rod, and realizes high-precision measurement of the inner hole groove diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the present application can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0029] Figure 1 This is a front view of the inner hole groove diameter measuring device of the present application;

[0030] Figure 2 It is a structural schematic diagram of the inner hole groove diameter measuring device of the present application;

[0031] Figure 3 yes Figure 2 A partial enlarged view of

[0032] Figure 4 It is a schematic structural diagram of the connection between the upper transfer rod and the measuring rod of the inner hole groove diameter measuring device of the present application;

[0033] Figure 5 It is a partial enlarged view of the inner hole groove diameter measuring device of the present application.

[0034] The accompanying drawings are as follows:

[0035] 1-measuring instrument; 11-measuring rod; 2-guide sleeve; 21-upper guide sleeve; 22-lower guide sleeve; 3-transmission rod; 31-upper transmission rod; 32-lower transmission rod; 33-first spring; 4-driving mechanism; 41-driving block; 42-sliding sleeve; 43-pressing sleeve; 5-probe mechanism; 51-connecting rod; 52-probe; 53-end cover; 6-second spring; 7-sliding assembly; 71-sliding groove; 711-limiting convex strip; 72-guide block; 721-limiting groove; 8-clamping cover. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the related application, rather than to limit the application. The described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0037] It should be noted that, for ease of description, only the parts related to the relevant applications are shown in the accompanying drawings. In the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.

[0038] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0039] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0040] See also Figure 1 and Figure 2Some embodiments of the present application disclose an inner hole groove diameter measuring device, including a measuring instrument 1, a guide sleeve 2, a transmission rod 3, a driving mechanism 4 and a probe mechanism 5. Among them,

[0041] The measuring instrument 1 is fixedly mounted on the guide sleeve 2. The position of the measuring instrument 1 on the guide sleeve 2 is fixed. The measuring rod 11 of the measuring instrument 1 extends into the guide sleeve 2. The measuring rod 11 can move in the guide sleeve 2.

[0042] The guide sleeve 2 has a channel for installing a transmission rod 3, and the transmission rod 3 is located in the guide sleeve 2. Optionally, the guide sleeve 2 is coaxial with the transmission rod 3, and the first end of the transmission rod 3 is connected to the measuring rod 11 of the measuring instrument 1, and the second end of the transmission rod 3 is connected to the probe mechanism 5;

[0043] The driving mechanism 4 is connected to the transmission rod 3 and is used to drive the transmission rod 3 to move in the guide sleeve 2. The movement direction of the transmission rod 3 is along the axis direction of the transmission rod 3. The movement of the transmission rod 3 drives the measuring rod 11 to move. The movement direction of the measuring rod 11 is consistent with the movement direction of the transmission rod 3.

[0044] like Figure 2 As shown, the probe mechanism 5 includes a connecting rod 51, a probe 52 and an end cover 53. The end cover 53 is connected to the guide sleeve 2. The probe 52 is installed on the end cover 53 through a sliding assembly 7. The sliding assembly 7 guides the sliding of the probe 52. A measuring hole is opened on the end cover 53. The measuring holes are located at both ends of the guiding direction of the sliding assembly 7 for the probe 52. The guiding direction of the sliding assembly 7 for the probe 52 is perpendicular to the axial direction of the transmission rod 3. The first end of the connecting rod 51 is hinged to the second end of the transmission rod 3, and the second end of the connecting rod 51 is hinged to the probe 52. The movement of the transmission rod 3 is transmitted to the probe 52 through the connecting rod 51. The connecting rod 51 cooperates with the sliding assembly 7 to convert the vertical movement of the transmission rod 3 into the horizontal movement of the probe 52.

[0045] It should be noted here that the first end and the second end of the connecting rod 51 are the two ends in the length direction of the connecting rod 51, the first end and the second end of the transmission rod 3 are the two ends in the length direction of the transmission rod 3, and the length direction of the transmission rod 3 is parallel to the axial direction of the transmission rod 3.

[0046] When in use, the probe mechanism 5 extends into the inner hole, and the transmission rod 3 is driven to move along its own axis through the driving mechanism 4. The transmission rod 3 drives the connecting rod 51 to rotate toward the end cover 53. The connecting rod 51 cooperates with the sliding assembly 7. The end of the connecting rod 51 connected to the probe 52 pushes the probe 52 to extend from the measuring hole of the end cover 53 until it abuts against the groove wall of the inner hole groove. At this time, the reading of the measuring instrument 1 is the measurement result of the inner hole groove diameter. This solution converts the position information of the probe 52 into the displacement information of the transmission rod 3, and the transmission rod 3 transmits the displacement information to the measuring rod 11 to realize the measurement of the inner hole groove diameter by the measuring instrument 1.

[0047] like Figure 5 As shown, there are two probes 52 and they are symmetrically distributed on both sides of the axial direction of the transmission rod 3. There are also two connecting rods 51. The first end of each connecting rod 51 is hinged to the second end of the transmission rod 3, and the second end of each connecting rod 51 is hinged to the probe 52 corresponding to the position. The two connecting rods 51 are in a "human" shape.

[0048] After the measurement is completed, the driving mechanism 4 drives the transmission rod 3 to move along its own axial direction, and the transmission rod 3 drives the connecting rod 51 to move in the direction away from the end cover 53. The connecting rod 51 pulls the probe 52, and the probe 52 cooperates with the sliding assembly 7 through the connecting rod 51, retracts to the measuring hole, and takes out the inner hole groove diameter measuring device.

[0049] The inner hole groove diameter measuring device disclosed in the present application can replace the probe mechanism 5 according to the diameters of different inner hole grooves, so that the inner hole groove diameter measuring device can adapt to the measurement requirements of inner hole grooves with different diameters.

[0050] The extension and retraction of the probe of the inner hole groove diameter measuring device disclosed in the present solution are realized by the connecting rod 51 and the sliding assembly 7, instead of the method of pulling back the probe 52 by a spring in the related art, thereby improving the reliability of the retraction of the probe 52.

[0051] In some embodiments, the guide sleeve 2 and the transfer rod 3 are an integral structure, and the inner hole groove diameter measuring device only includes a guide sleeve 2 and a transfer rod 3. The transfer rod 3 is installed in the guide sleeve 2, and the length of the guide sleeve 2 is equal to the length of the transfer rod 3. The first end of the guide sleeve 2 is installed with the measuring instrument 1, and the second end of the guide sleeve 2 is connected to the end cover 53 of the probe mechanism 5. The first end of the transfer rod 3 is connected to the side rod of the measuring instrument 1, and the second end of the transfer rod 3 is connected to the connecting rod 51 of the probe mechanism 5 after extending out of the guide sleeve 2.

[0052] In this embodiment, part of the length of the transmission rod 3 may be exposed outside the guide sleeve 2, and the driving mechanism 4 is connected to the part of the transmission rod 3 exposed outside the guide sleeve 2 to drive the transmission rod 3 to move. The part of the transmission rod 3 exposed outside the guide sleeve 2 may be located at the upper end of the guide sleeve 2, or at the lower end of the guide sleeve 2, or at the middle of the guide sleeve 2.

[0053] In some embodiments, the guide sleeve 2 and the transfer rod 3 are split structures. Specifically, the guide sleeve 2 includes an upper guide sleeve 21 and a lower guide sleeve 22, and the transfer rod 3 includes an upper transfer rod 31 and a lower transfer rod 32. Specifically, the measuring instrument 1 is installed on the upper guide sleeve 21, and the upper guide sleeve 21 is sleeved on the upper transfer rod 31. The first end of the upper transfer rod 31 is connected to the measuring rod 11 of the measuring instrument 1, and the second end of the upper transfer rod 31 is connected to the driving mechanism 4. The lower guide sleeve 22 is connected to the end cover 53, and the lower guide sleeve 22 is sleeved on the lower transfer rod 32. The first end of the lower transfer rod 32 is connected to the upper transfer rod 31 through the first spring 33, and the second end of the lower transfer rod 32 is connected to the connecting rod 51.

[0054] During measurement, the user presses the driving block 41, and the driving block 41 drives the upper transmission rod 31 to move toward the lower guide sleeve 22. The sliding sleeve 42 moves along with the upper transmission rod 31 toward the lower guide sleeve 22. The sliding sleeve 42 squeezes the first spring 33, and the first spring 33 applies a thrust to the lower transmission rod 32. The lower transmission rod 32 drives the connecting rod 51 to move, and the measuring head 52 extends out of the measuring hole.

[0055] After measurement, the user lifts up the driving block 41, and the driving block 41 drives the upper transfer rod 31 to move toward the direction of the upper guide sleeve 21. The sliding sleeve 42 moves along with the upper transfer rod 31 toward the direction of the upper guide sleeve 21. The sliding sleeve 42 drives the first spring 33 to move upward. The first spring 33 pulls the lower transfer rod 32 to move upward. The lower transfer rod 32 drives the connecting rod 51 to move, and the probe 52 retracts into the measuring hole.

[0056] In this embodiment, the upper transfer rod 31 is connected to the lower transfer rod 32 by the first spring 33, and the force of the upper transfer rod 31 is transmitted to the lower transfer rod 32 through the first spring 33. The probe 52 is in flexible contact with the inner hole groove, reducing damage to the probe 52; at the same time, the position of the probe 52 in the inner hole groove can be adaptively adjusted.

[0057] The guide sleeve 2 and the transmission rod 3 are separate structures, which can reduce the difficulty of assembling the driving mechanism 4, the guide sleeve 2 and the transmission rod 3.

[0058] In some embodiments, the driving mechanism 4 includes a driving block 41 and a sliding sleeve 42. The driving block 41 is fixedly connected to the upper transfer rod 31, and the driving block 41 drives the upper transfer rod 31 to move along its own axis.

[0059] The sliding sleeve 42 is sleeved on the upper transmission rod 31 , the first end of the sliding sleeve 42 abuts against the driving block 41 , the second end of the sliding sleeve 42 is slidably connected to the lower guide sleeve 22 , and the second end of the sliding sleeve 42 is connected to the first spring 33 .

[0060] In this embodiment, the driving block 41 drives the upper transfer rod 31 to move, and the driving block 41, the upper transfer rod 31 and the sleeve 42 move synchronously. The upper transfer rod 31 is connected to the first spring 33 through the sleeve 42. When the upper transfer rod 31 drives the probe 52 to extend, the upper transfer rod 31 applies downward pressure to the first spring 33 through the sleeve 42 to compress the first spring 33.

[0061] There are many ways to fix the drive block 41 and the upper transfer rod 31. One is that the drive block 41 is threadedly connected to the upper transfer rod 31. Specifically, the drive block 41 has an internal thread, and the upper transfer rod 31 has an external thread. The drive block 41 and the upper transfer rod 31 are threadedly connected by the internal thread and the external thread. One is that the drive block 41 corresponds to the upper transfer rod 31 with an interference fit. Specifically, the drive block 41 has a hole that matches the upper transfer rod 31, and the position of the drive block 41 corresponding to the upper transfer rod 31 is interference fit with the hole. One is that the drive block 41 is connected to the upper transfer rod 31 by snapping. Specifically, a snap block is provided on the drive block 41, and the transfer rod 3 has a snap groove that matches the snap block. The snap connection between the drive block 41 and the upper transfer rod 31 is achieved by the cooperation between the snap block and the snap groove. One is that the drive block 41 is connected to the upper transfer rod 31 by welding or bonding.

[0062] like Figure 1 and Figure 2 As shown, the driving block 41 is disc-shaped and is sleeved on the transmission rod 3 . The diameter of the driving block 41 is larger than the diameter of the transmission rod 3 , so that the user can press the driving block 41 conveniently.

[0063] The driving block 41 is not limited to a disc shape, but may also be a fan shape or a long strip shape. In the embodiment where the driving block 41 is connected to the upper transmission rod 31 by threaded connection, interference fit or snap connection, the driving block 41 has a hole that matches the transmission rod 3; in the embodiment where the driving block 41 is connected to the upper transmission rod 31 by welding or bonding, the driving block 41 may only be provided with an arc structure that matches the rod wall of the transmission rod 3 on the side that fits the transmission rod 3, and the driving block 41 is located on one side of the transmission rod 3.

[0064] The second end of the sliding sleeve 42 is fixedly connected to the first spring 33. The connection between the sliding sleeve 42 and the first spring 33 can be a welding connection, a clamping connection, or other fixed connection methods.

[0065] The sliding sleeve 42 is slidably connected to the lower guide sleeve 22. Specifically, the sliding sleeve 42 is coaxially arranged with the lower guide sleeve 22. When the sliding sleeve 42 moves synchronously with the upper transfer rod 31 and the driving block 41, the sliding sleeve 42 slides in the lower guide sleeve 22, and the end of the sliding sleeve 42 sliding in the lower guide sleeve 22 is limitedly engaged with an end of the lower guide sleeve 22 close to the upper guide sleeve 21 to prevent the sliding sleeve 42 from escaping from the end of the sliding sleeve 42 close to the upper guide sleeve 21 when the sliding sleeve 42 moves toward the measuring instrument with the upper transfer rod 31.

[0066] Optionally, the second end of the sliding sleeve 42 is limitedly matched with the lower guide sleeve 22, and the second end of the sliding sleeve 42 has a limiting plate arranged along the circumference of the sliding sleeve 42;

[0067] It also includes a compression sleeve sleeved on the sliding sleeve 42 . The compression sleeve 43 has a compression plate abutting against the end surface of the limit plate close to the upper guide sleeve 21 . The sliding sleeve 42 and the compression sleeve 43 are slidably matched, and the compression sleeve 43 is fixedly connected to the lower guide sleeve 22 .

[0068] The lower transmission rod 32 has a connection boss connected to the first spring 33, and the first spring 33 is fixedly connected to the connection boss. The first spring 33 and the connection boss can be fixedly connected by welding, clamping, or other fixed connection methods.

[0069] In some embodiments, such as Figure 4 As shown, the transmission rod 3 is connected to the measuring rod 11 through the second spring 6. During measurement, after the driving mechanism 4 drives the transmission rod 3 to move in the direction of the measuring head mechanism 5, the second spring 6 is stretched; after measurement, the user releases the driving mechanism 4, and the transmission rod 3 moves in the direction away from the measuring head mechanism 5 under the restoring force of the second spring 6, and then the transmission rod 3 drives the measuring head 52 assembly to automatically reset.

[0070] In this embodiment, the transmission assembly and the probe 52 assembly are automatically reset by the second spring 6, and no manual operation is required, which further improves the convenience of using the inner hole groove diameter measuring device.

[0071] In some embodiments, the sliding assembly 7 includes a slide groove 71 and a guide block 72 . The slide groove 71 is provided on one of the probe 52 and the end cover 53 , and the guide block 72 is provided on the other of the probe 52 and the end cover 53 .

[0072] like Figure 3 As shown, a slide groove 71 is provided below the probe 52, and a guide block 72 is provided on the end cover 53. The slide groove 71 of the probe 52 and the guide block 72 of the end cover 53 are slidably matched to realize the sliding of the probe 52 along the length direction of the guide block 72. It should be noted here that the guide block 72 is a linear type, and the length direction of the guide block 72 is perpendicular to the axial direction of the lower guide sleeve 22, and the two ends of the guide block 72 correspond to the measuring holes on the end cover 53 respectively.

[0073] The sliding assembly 7 can guide the movement of the probe 52 toward the measuring hole, thereby improving the reliability of the measurement by the probe 52 .

[0074] In some embodiments, such as Figure 3As shown, the groove wall of the slide groove 71 has a limiting convex strip 711 , and the guide block 72 has a limiting groove 721 that cooperates with the limiting convex strip 711 . When the probe 52 slides, the limiting convex strip 711 slides in the limiting groove 721 .

[0075] like Figure 3 As shown, the length direction of the limiting ridge 711 is parallel to the length direction of the slide slot 71, and the length direction of the limiting groove 721 is parallel to the length direction of the slide slot 71. The limiting ridge 711 cooperates with the limiting groove 721 to limit the probe 52 along the axial direction of the lower guide sleeve 22.

[0076] In some implementations, a guide column is disposed at the lower end of the transfer rod 3 , the guide column is located between the two connecting rods 51 , and the end cover 53 has a guide hole that cooperates with the guide column.

[0077] During measurement, the transmission rod 3 moves toward the end cover 53, and the guide column moves in the guide hole, and the guide hole plays a guiding and limiting role for the guide column;

[0078] After the measurement, the transfer rod 3 moves in a direction away from the end cover 53, and the guide column moves in the guide hole, and the guide hole guides the movement of the guide column.

[0079] The measuring instrument 1 is connected to the guide sleeve 2 via a clamping sleeve 8, and the clamping sleeve 8 is fixedly connected to the guide sleeve 2; a connecting sleeve is also provided on the measuring rod 11, and the connecting sleeve is fixedly connected to the measuring rod 11, and the second spring 6 is fixedly connected to the connecting sleeve.

[0080] The inner hole groove diameter measuring device disclosed in the present scheme is small in size and can be handheld for measurement. It captures the size information of the inner hole groove through mechanical linkage, and converts the displacement information of the probe 52 into the displacement of the transmission rod 3, which helps to achieve high-precision measurement of the inner hole groove diameter.

[0081] The inner hole groove diameter measuring device cooperates with the transmission rod 3 and the probe mechanism 5. The probe 52 of the probe mechanism 5 is pushed out by pressing the transmission rod 3. Automatic measurement can be achieved by pressing once, and no secondary adjustment is required. The operation steps are simple, which reduces the skill and experience requirements for the operator and improves the convenience and efficiency of measurement. The probe mechanism 5 can enter the space where the inner hole groove to be measured is located, and the probe 52 can probe into the inner hole groove. Compared with external measurement, the accuracy of the inner hole groove diameter measurement is improved. The probe 52 can extend to different lengths according to the diameter of the inner hole groove, and has a certain degree of versatility.

[0082] Optionally, the end cover 53 is connected to the guide sleeve 2 by bolts, and the end cover 53 can be easily disassembled and replaced, so that the inner hole groove diameter measuring device can meet the measurement requirements of inner hole grooves with different apertures, while simplifying the maintenance and servicing process.

[0083] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used, and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. The scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned application concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in this application (but not limited to) to form a technical solution.

Claims

1. An inner hole groove diameter measuring device, characterized in that: include: Measuring instruments (1); A guide sleeve (2), the measuring instrument (1) being mounted on the guide sleeve (2); A transmission rod (3) is installed in the guide sleeve (2), and a first end of the transmission rod (3) is connected to a measuring rod (11) of the measuring instrument (1); A driving mechanism (4) connected to the transmission rod (3) and used for driving the transmission rod (3) to move along its own axis direction; A probe mechanism (5) comprises a connecting rod (51), a probe (52) and an end cover (53), wherein the first end of the connecting rod (51) is hinged to the second end of the transmission rod (3), the second end of the connecting rod (51) is hinged to the probe (52), the probe (52) is connected to the end cover (53) via a sliding assembly (7), the sliding direction of the sliding assembly (7) is perpendicular to the axial direction of the transmission rod (3), and the end cover (53) is connected to the guide sleeve (2) and has a measuring hole for the probe (52) to extend out.

2. The inner hole groove diameter measuring device according to claim 1, characterized in that: The guide sleeve (2) comprises an upper guide sleeve (21) and a lower guide sleeve (22); the transfer rod (3) comprises an upper transfer rod (31) and a lower transfer rod (32); The measuring instrument (1) is mounted on the upper guide sleeve (21), the upper guide sleeve (21) is sleeved on the upper transfer rod (31), a first end of the upper transfer rod (31) is connected to the measuring rod (11), and a second end of the upper transfer rod (31) is connected to the driving mechanism (4); The lower guide sleeve (22) is connected to the end cover (53), the lower transfer rod (32) is arranged in the lower guide sleeve (22), the first end of the lower transfer rod (32) is connected to the upper transfer rod (31) via a first spring (33), and the second end of the lower transfer rod (32) is connected to the connecting rod (51).

3. The inner hole groove diameter measuring device according to claim 2, characterized in that: The driving mechanism (4) comprises: A driving block (41) fixedly connected to the upper transfer rod (31); A sliding sleeve (42) is sleeved on the upper transfer rod (31), a first end of the sliding sleeve (42) abuts against the driving block (41), a second end of the sliding sleeve (42) is slidably connected to the lower guide sleeve (22), and a second end of the sliding sleeve (42) is connected to the first spring (33).

4. The inner hole groove diameter measuring device according to claim 3, characterized in that: The driving block (41) is connected to the upper transmission rod (31) via threads.

5. The inner hole groove diameter measuring device according to claim 3, characterized in that: The second end of the sliding sleeve (42) has a limiting plate arranged along the circumference of the sliding sleeve (42). It also includes a compression sleeve (43) sleeved on the sliding sleeve (42), the compression sleeve (43) having a compression plate abutting against the end surface of the limit plate close to the upper guide sleeve (21), the sliding sleeve (42) and the compression sleeve (43) slidingly cooperate, and the compression sleeve (43) is fixedly connected to the lower guide sleeve (22).

6. The inner hole groove diameter measuring device according to any one of claims 1 to 5, characterized in that: The transmission rod (3) is connected to the measuring rod (11) via a second spring (6).

7. The inner hole groove diameter measuring device according to claim 1, characterized in that: The sliding assembly (7) comprises a sliding groove (71) and a guide block (72), wherein the sliding groove (71) and the guide block (72) are slidably matched. The guide block (72) is provided on one of the measuring head (52) and the end cover (53), and the guide block (72) is arranged on the other of the measuring head (52) and the end cover (53).

8. The inner hole groove diameter measuring device according to claim 7, characterized in that: The groove wall of the slide groove (71) has a limiting convex strip (711), and the guide block (72) has a limiting groove (721) that cooperates with the limiting convex strip (711) and is used to limit the measuring head (52) along the axial direction of the guide sleeve (2).

9. The inner hole groove diameter measuring device according to claim 1, characterized in that: A guide column is provided at the lower end of the transmission rod (3). The end cover (53) is located between the two measuring heads (52) and has a guide block, wherein a guide hole cooperating with the guide column is provided in the guide block.

10. The inner hole groove diameter measuring device according to claim 1, characterized in that: A meter clamping sleeve (8) is provided on the guide sleeve (2), and the meter clamping sleeve (8) is used to fix the measuring instrument (1).

Images