Cross-rod distance detection device

Abstract

The utility model relates to the technical field of gear detection devices, in particular to a cross-rod distance detection device. The cross-rod distance detection device comprises a base, a dial indicator, a carrying table, a fixed measuring rod, a swing rod assembly and a movable measuring rod, the carrying table is arranged on the base and used for carrying a gear, and the fixed measuring rod is arranged on the base and can be clamped in a tooth groove of the gear located on the carrying table. A micrometric screw of the dial indicator is connected with the swing rod assembly. The swing rod assembly is movably arranged on the base and is in transmission connection with the two movable measuring rods, so that the movable measuring rods have clamping positions far away from the fixed measuring rod and detection positions close to the fixed measuring rod. When the movable measuring rod is located at the clamping position, the gear can be placed on or moved out of the carrying table. When the movable measuring rods are located at the detection positions, the two movable measuring rods are clamped in different tooth grooves in the gear respectively. The cross-rod distance detection device provided by the utility model can detect the cross-rod distance of a non-full-tooth gear, reduces the detection cost, and improves the detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of gear detection devices, in particular to a cross-bar distance detection device. Background Art

[0002] In gear manufacturing, the span is a measurement indicator that reflects the pitch circle tooth thickness. Using the measuring stick method to measure this span helps control tooth thickness and avoid positioning errors. However, for parts with unusual tooth shapes, such as those with partial tooth formations, the span cannot be directly measured using the measuring stick method. Using specialized gear measuring devices or 3D measuring instruments is not only costly, but also time-consuming and inefficient, making it unsuitable for large-scale gear testing. Utility Model Content

[0003] The utility model aims to provide a cross-pitch detection device to improve the detection efficiency of the cross-pitch of a gear with incomplete teeth and reduce the detection cost.

[0004] To achieve this purpose, the technical solution adopted in this utility model is:

[0005] A cross-rod distance detection device includes a base, a micrometer, a carrier, and a fixed measuring rod, wherein the carrier is arranged on the base and is used to carry the gear, and the fixed measuring rod is arranged on the base and can be clamped in the tooth groove of the gear located on the carrier;

[0006] The cross-rod distance detection device further includes a pendulum assembly and a movable measuring rod, the micrometer screw of the micrometer being connected to the pendulum assembly; the pendulum assembly being movably disposed on the base and being in transmission connection with the two movable measuring rods, so that the movable measuring rods have a clamping position away from the fixed measuring rods and a detection position close to the fixed measuring rods;

[0007] When the movable measuring rod is located at the clamping position, the gear can be placed on or moved out of the carrier; when the movable measuring rod is located at the detection position, the two movable measuring rods are respectively engaged in different tooth grooves on the gear.

[0008] As an optional solution, the rocker assembly includes:

[0009] A shift lever, pivotally connected to the base, one end of which is provided with the movable measuring rod, and the micrometer screw is connected to the shift lever;

[0010] A connecting rod is pivotally connected to the base, and another movable measuring rod is provided at one end of the connecting rod; the shift rod is transmission-connected to the other end of the connecting rod so that when the shift rod is pressurized, it can rotate relative to the base and drive the connecting rod to rotate synchronously, thereby driving the two movable measuring rods to move to the clamping position.

[0011] As an optional solution, the rocker assembly further includes:

[0012] A first guide block is provided on the base and is provided with a first guide hole;

[0013] a push rod movably passing through the first guide hole, one end of the push rod being connected to or abutting against the shifting rod, and the other end of the push rod being connected to or abutting against the other end of the connecting rod; the shifting rod driving the connecting rod to rotate synchronously through the push rod;

[0014] The first elastic member is disposed between the first guide block and the shifting rod, and the first elastic member is configured to have a tendency to drive the shifting rod to rotate and to cause the movable measuring rod on the shifting rod to clamp the gear.

[0015] As an optional solution, the rocker arm assembly also includes a second guide block, which is arranged on the base and adjacent to the connecting rod; the second guide block is provided with a second guide hole coaxial with the first guide hole, and the other end of the top rod can move through the second guide hole.

[0016] As an optional solution, the first guide block is arranged adjacent to the shift rod, and the dial indicator is installed on the first guide block.

[0017] As an optional solution, the connecting rod includes a first rod and a second rod connected in an L-shape, the connection between the first rod and the second rod is pivotally connected to the base, the end of the first rod away from the second rod is connected to or abuts the top rod, and the end of the second rod away from the first rod is provided with the movable measuring rod.

[0018] As an optional solution, the rocker assembly further includes:

[0019] A support block is provided on the base;

[0020] A second elastic member is provided between the supporting block and the second rod, and the second elastic member is configured to have a tendency to drive the connecting rod to rotate and to make the movable measuring rod on the connecting rod clamp the gear.

[0021] As an optional solution, the platform is provided with at least two avoidance grooves spaced apart along the circumferential direction, and the avoidance grooves pass through both ends of the platform in the height direction; the movable measuring rod passes through the corresponding avoidance grooves and protrudes from the upper surface of the platform.

[0022] As an optional solution, the cross-rod distance detection device further includes a base, the base is arranged on the base, and the carrier is arranged on the base;

[0023] The carrier is provided with three avoidance grooves, one end of the fixed measuring rod is provided on the base, and the other end of the fixed measuring rod passes through the corresponding avoidance groove and protrudes from the upper surface of the carrier.

[0024] As an optional solution, the carrier is provided with a clearance hole, and the clearance hole can avoid the hub of the gear.

[0025] The beneficial effects of the utility model are:

[0026] The utility model proposes a device for detecting the span of the gear, wherein the rocker assembly drives the mobile measuring rod to move to the clamping position, so that the gear is placed on the carrier, and the fixed measuring rod is engaged in the tooth groove of the gear. Then, the rocker assembly drives the mobile measuring rod to move to the detection position, and the two mobile measuring rods are respectively engaged in different tooth grooves on the gear, so that the fixed measuring rod and the two mobile measuring rods are clamped together in different tooth grooves on the gear. The micrometer screw of the micrometer is connected to the rocker assembly to detect the span of the gear. There is no need to use professional gear measuring devices or three-dimensional measuring instruments and other equipment, which reduces the detection cost. At the same time, it makes the detection operation of the span of the gear (especially the gear with non-full teeth) simple and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a gear span detection device provided by an embodiment of the present invention;

[0028] Figure 2 It is a structural diagram of a cross-rod distance detection device provided by an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a cross-rod distance detection device without a carrier provided by an embodiment of the present invention.

[0030] The names and numbers of the components in the figure are as follows:

[0031] 100, gear; 101, tooth groove;

[0032] 1. Base; 2. Micrometer; 21. Micrometer screw; 3. Carrier; 31. Avoidance groove; 32. Clearance hole; 4. Fixed measuring rod; 5. Mobile measuring rod; 6. Push rod; 7. Connecting rod; 71. First rod; 72. Second rod; 8. First guide block; 9. Push rod; 10. First elastic member; 11. Second guide block; 12. Support block; 13. Second elastic member; 14. Base. DETAILED DESCRIPTION

[0033] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] In gear manufacturing, the span is a measurement indicator that reflects the pitch circle tooth thickness. Using the measuring stick method to measure the span is used to control the tooth thickness and avoid positioning errors. Measuring the span of fully toothed gears is an existing technique and will not be detailed here.

[0039] For toothed parts with special tooth shapes, such as non-full toothed parts (such as Figure 1 Gear 100, whose circumferential profile features three equally spaced tooth grooves 101, cannot be directly measured using the measuring rod method. Using specialized gear measuring equipment or a three-dimensional measuring instrument is not only costly and time-consuming, but also inefficient, making it unsuitable for large-scale gear testing.

[0040] To solve the above problems, Figures 1 and 2 As shown, this embodiment provides a device for detecting cross-rod distance, comprising a base 1, a micrometer 2, a platform 3, a fixed measuring rod 4, a rocker assembly, and a movable measuring rod 5. The platform 3 is mounted on the base 1 and is used to support a gear 100. The fixed measuring rod 4 is mounted on the base 1 and can be engaged with a tooth groove 101 of the gear 100 located on the platform 3. The micrometer screw 21 of the micrometer 2 is connected to the rocker assembly. The rocker assembly is movably mounted on the base 1 and is transmission-connected to two movable measuring rods 5, so that the movable measuring rods 5 have a clamping position away from the fixed measuring rod 4 and a testing position close to the fixed measuring rod 4. When the movable measuring rods 5 are in the clamping position, the gear 100 can be placed on or removed from the platform 3. When the movable measuring rods 5 are in the testing position, the two movable measuring rods 5 are respectively engaged with different tooth grooves 101 on the gear 100.

[0041] Specifically, if Figure 1 and Figure 3 As shown, the rocker assembly includes a lever 6 and a connecting rod 7. The lever 6 is pivotally connected to the base 1. A movable measuring rod 5 is mounted on one end of the lever 6, and a micrometer screw 21 is connected to the lever 6. The connecting rod 7 is pivotally connected to the base 1. Another movable measuring rod 5 is mounted on one end of the connecting rod 7. The lever 6 and the other end of the connecting rod 7 are in a transmission connection, allowing the lever 6 to rotate relative to the base 1 when pressed, driving the connecting rod 7 to rotate synchronously, thereby moving the two movable measuring rods 5 to the clamping position. In other words, simply pressing the lever 6 achieves synchronous rotation of the two movable measuring rods 5, making operation simple and easy, and improving detection efficiency.

[0042] In this embodiment, the lever 6 and the connecting rod 7 are both mounted on the base 1 via a pivot, so that the lever 6 and the connecting rod 7 can rotate relative to the base 1. Figure 2 Press one end of the lever 6 in the direction indicated by the middle arrow, so that the lever 6 moves along Figure 2 The connecting rod 7 rotates in the direction indicated by the arrow, and at the same time drives the connecting rod 7 along Figure 2 The two movable measuring rods 5 rotate synchronously in the direction indicated by the middle arrow, so that the two movable measuring rods 5 rotate along with their corresponding shifting rods 6 and connecting rods 7, and move away from the fixed measuring rod 4, thereby increasing the diameter of the same virtual circle where the fixed measuring rod 4 and the two movable measuring rods 5 are located, so as to facilitate the placement of the gear 100 to be measured on the carrier 3.

[0043] like Figures 1 to 3 As shown, the rocker assembly further includes a first guide block 8, a push rod 9, and a first elastic member 10. The first guide block 8 is disposed on the base 1 and defines a first guide hole. The push rod 9 moves through the first guide hole. One end of the push rod 9 is connected to or abuts the shift lever 6, and the other end of the push rod 9 is connected to or abuts the other end of the connecting rod 7. The shift lever 6 drives the connecting rod 7 to rotate synchronously via the push rod 9. The first elastic member 10 is disposed between the first guide block 8 and the shift lever 6. The first elastic member 10 is configured to drive the shift lever 6 to rotate and clamp the gear 100 on the moving measuring rod 5 on the shift lever 6. The provision of the first guide block 8 enables the push rod 9 to move axially along the first guide hole, thereby limiting the axial position of the push rod 9. In this embodiment, one end of the push rod 9 abuts the shift lever 6. In other embodiments, one end of the push rod 9 may be hingedly connected to the shift lever 6, so that rotation of the shift lever 6 drives the push rod 9 along the first guide hole.

[0044] It should be noted that the first elastic member 10 is a spring and is sleeved on the top rod 9. The spring has a simple structure and is easy to install. Figure 2 When the pressing force on the lever 6 is removed, the first elastic member 10 applies an elastic restoring force to the lever 6 (the same as the Figure 2 and rotate the lever 6 in the opposite direction (in the opposite direction to the direction indicated by the arrow of the pressing force in the Figure 2 The first elastic member 10 exerts a restorative force on the movable measuring rod 5 on the lever 6 through the lever action of the lever 6, exerting a constant tendency to maintain the movable measuring rod 5 in the detection position. Alternatively, the first elastic member 10 may be a spring or elastic rubber member, which are not specifically enumerated here.

[0045] like Figures 1 to 3 As shown, the rocker assembly also includes a second guide block 11, which is mounted on the base 1 and adjacent to the connecting rod 7. This second guide block 11 defines a second guide hole coaxial with the first guide hole, through which the other end of the push rod 9 slides. This second guide block 11 guides and limits the end of the push rod 9 near the connecting rod 7, preventing positional deviation at that end and ensuring that the push rod 9 consistently reciprocates along its axial direction.

[0046] Furthermore, the first guide block 8 is provided adjacent to the shift rod 6, and the dial gauge 2 is mounted on the first guide block 8. The dial gauge 2 and the push rod 9 share the same guide block, which not only achieves a stable installation of the dial gauge 2 but also eliminates the need for an additional mounting structure for the dial gauge 2, thereby improving the compactness of the cross-rod distance detection device.

[0047] like Figure 3 As shown, the connecting rod 7 includes a first rod 71 and a second rod 72 connected in an L-shape. The connection between the first rod 71 and the second rod 72 is pivotally connected to the base 1. The end of the first rod 71 away from the second rod 72 is connected to or abuts the top rod 9. The end of the second rod 72 away from the first rod 71 is provided with a movable measuring rod 5. By configuring the connecting rod 7 into an L-shape, the length of a single side of the connecting rod 7 is shortened, reducing the area swept by the connecting rod 7 during rotation, thereby reducing the installation space of the connecting rod 7 and improving the compactness of the cross-rod distance detection device. The other end of the top rod 9 in this embodiment abuts against the first rod 71. In other embodiments, the other end of the top rod 9 can also be hingedly connected to the first rod 71.

[0048] When along Figure 2 When one end of the lever 6 is pressed in the direction indicated by the middle arrow, the lever 6 pushes the top rod 9 to move along the axial direction of the top rod 9, so that the top rod 9 pushes the connecting rod 7 along the axial direction of the top rod 9. Figure 2 The connecting rod 7 rotates in the direction indicated by the middle arrow, and at the same time drives the movable measuring rod 5 on the connecting rod 7 to rotate synchronously in the direction away from the fixed measuring rod 4 and rotate to the clamping position.

[0049] like Figure 3 As shown, the rocker assembly further includes a support block 12 and a second elastic member 13. The support block 12 is disposed on the base 1. The second elastic member 13 is disposed between the support block 12 and the second rod 72. The second elastic member 13 is configured to have a tendency to drive the connecting rod 7 to rotate and to cause the moving measuring rod 5 on the connecting rod 7 to clamp the gear 100. The second elastic member 13 is a spring and is compressed and installed between the support block 12 and the second rod 72. The spring has a simple structure and is easy to install. When the connecting rod 7 is pushed along the top rod 9, the connecting rod 7 moves along the top rod 9. Figure 2 When the connecting rod 7 rotates in the direction indicated by the middle arrow, the second elastic member 13 is compressed. When the pressing force on the lever 6 is removed, the second elastic member 13 applies elastic restoring force to the second rod 72 and causes the connecting rod 7 to rotate in the opposite direction (with the connecting rod 7 rotating in the opposite direction). Figure 2), thereby driving the movable measuring rod 5 on the second rod 72 to rotate synchronously and bring the movable measuring rod 5 closer to the fixed measuring rod 4 until it moves to the detection position. At this time, the movable measuring rod 5 on the second rod 72 and the movable measuring rod 5 on the shift lever 6 jointly clamp the gear 100 on the carrier 3. At the same time, when the shift lever 6 rotates in the opposite direction, it can push the push rod 9 to reset and press the push rod 9 against the shift lever 6. The elastic restoring force of the second elastic member 13 is applied to the movable measuring rod 5 on the second rod 72 through the second rod 72, so that the movable measuring rod 5 on the second rod 72 always has a tendency to remain in the detection position. The second elastic member 13 can also be a spring or elastic rubber, etc., which are not listed here.

[0050] like Figure 2 and Figure 3 As shown, the platform 3 is circumferentially spaced apart with at least two escape slots 31 extending through both ends of the platform 3 in the height direction. The movable measuring rod 5 passes through the corresponding escape slots 31 and protrudes from the upper surface of the platform 3. In this embodiment, the shift lever 6 and connecting rod 7 are located below the platform 3 to prevent interference with the removal and placement of the gear 100 on the platform 3. One end of each movable measuring rod 5 extends from the corresponding escape slot 31 beyond the platform 3, allowing for easy engagement with the tooth groove 101 of the gear 100 on the platform 3.

[0051] It should be noted that the platform 3 is an annular structure with a clearance groove 31 extending radially along the platform 3. The movable measuring rods 5 can move within the clearance groove 31 and switch between the clamping position and the detection position. When the two movable measuring rods 5 are in the detection position, the same virtual circle containing the three measuring rods is concentric with the platform 3. Furthermore, the platform 3 is provided with a clearance hole 32 that clears the hub of the gear 100, allowing the gear 100 to rest flatly on the upper surface of the platform 3.

[0052] Specifically, the cross-rod distance detection device also includes a base 14, which is arranged on the base 1, and the carrier 3 is arranged on the base 1. The carrier 3 is provided with three avoidance grooves 31, and one end of the fixed measuring rod 4 is arranged on the base 14, and the other end of the fixed measuring rod 4 passes through the corresponding avoidance groove 31 and protrudes from the upper surface of the carrier 3. By providing the base 1, the height of the carrier 3 is raised, so that a space is formed between the carrier 3 and the base 1 to accommodate the shift rod 6 and the connecting rod 7. At the same time, three avoidance grooves 31 are opened on the carrier 3, and the fixed measuring rods 4 are installed on the base 14, so that the three measuring rods pass through the corresponding avoidance grooves 31 in a one-to-one correspondence.

[0053] For ease of understanding, the steps of measuring the span of the gear 100 by the span detection device of this embodiment are as follows:

[0054] Step S1, manually or by applying a force tool along Figure 2 Press one end of the lever 6 in the direction indicated by the middle arrow, so that the lever 6 moves along Figure 2 The connecting rod 7 rotates in the direction indicated by the arrow in the middle, while the push rod 9 is simultaneously driven to move, thereby driving the connecting rod 7 to rotate synchronously in the direction indicated by the arrow in the middle. This causes the two movable measuring rods 5 to move away from the fixed measuring rod 4 and move to the clamping position. A standard gear is placed on the carrier 3, and the fixed measuring rod 4 is engaged in a tooth groove on the standard gear. It should be noted that the standard gear is a high-precision standard component, and the standard gear is marked with the span distance.

[0055] Step S2, the pressing force is removed, and under the action of the first elastic member 10 and the second elastic member 13, the lever 6 and the connecting rod 7 rotate in the opposite direction (with the Figure 2 (In the opposite direction of the arrow in the figure), push rod 9 is reset, and the two movable measuring rods 5 rotate synchronously and move to the measuring position, so that they are respectively engaged in two different tooth grooves on the standard gear. Thus, the three measuring rods jointly clamp the standard gear on the carrier 3. At this time, the micrometer 2 measures a reference value of the standard gear through the lever 6.

[0056] Step S3, adjust the micrometer 2 to zero.

[0057] Step S4, repeating step S1, moving the standard gear out of the carrier 3 and placing the gear 100 to be measured on the carrier 3, repeating step S2 and reading the value of the micrometer 2.

[0058] The value measured by the dial gauge 2 in step S4 is added or subtracted from the standard value of the standard gear to determine the span of the gear 100 to be tested. Alternatively, the value measured by the dial gauge 2 in step S4 is checked to see if it falls within the acceptable size range for the span of the gear 100 to determine whether the gear 100 to be tested is qualified.

[0059] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A cross-rod distance detection device, characterized in that: The invention comprises a base (1), a micrometer (2), a carrier (3) and a fixed measuring rod (4), wherein the carrier (3) is arranged on the base (1) and is used to carry a gear (100), and the fixed measuring rod (4) is arranged on the base (1) and can be engaged in a tooth groove (101) of the gear (100) located on the carrier (3); The cross-rod distance detection device further comprises a pendulum assembly and a mobile measuring rod (5), wherein the micrometer screw (21) of the micrometer (2) is connected to the pendulum assembly; the pendulum assembly is movably arranged on the base (1) and is transmission-connected to the two mobile measuring rods (5), so that the mobile measuring rod (5) has a clamping position away from the fixed measuring rod (4) and a detection position close to the fixed measuring rod (4); When the movable measuring rod (5) is located at the clamping position, the gear (100) can be placed on or moved out of the carrier (3); when the movable measuring rod (5) is located at the detection position, the two movable measuring rods (5) are respectively engaged in different tooth grooves (101) on the gear (100).

2. The cross-rod distance detection device according to claim 1, characterized in that: The rocker assembly comprises: A shift lever (6) is pivotally connected to the base (1), one end of the shift lever (6) is provided with the movable measuring rod (5), and the micrometer screw (21) is connected to the shift lever (6); A connecting rod (7) is pivotally connected to the base (1), and one end of the connecting rod (7) is provided with another movable measuring rod (5); the shifting rod (6) is transmission-connected to the other end of the connecting rod (7), so that when the shifting rod (6) is pressed, it can rotate relative to the base (1) and drive the connecting rod (7) to rotate synchronously, thereby driving the two movable measuring rods (5) to move to the clamping position.

3. The cross-rod distance detection device according to claim 2, characterized in that: The rocker assembly further comprises: A first guide block (8) is arranged on the base (1) and is provided with a first guide hole; A push rod (9) is movable through the first guide hole, one end of the push rod (9) is connected to or abuts the shift rod (6), and the other end of the push rod (9) is connected to or abuts the other end of the connecting rod (7); the shift rod (6) drives the connecting rod (7) to rotate synchronously through the push rod (9); A first elastic member (10) is arranged between the first guide block (8) and the shifting rod (6), and the first elastic member (10) is configured to have a tendency to drive the shifting rod (6) to rotate and to cause the movable measuring rod (5) on the shifting rod (6) to clamp the gear (100).

4. The cross-rod distance detection device according to claim 3, characterized in that: The rocker assembly further comprises a second guide block (11), which is arranged on the base (1) and adjacent to the connecting rod (7); the second guide block (11) is provided with a second guide hole coaxial with the first guide hole, and the other end of the top rod (9) is movable through the second guide hole.

5. The cross-rod distance detection device according to claim 3, characterized in that: The first guide block (8) is arranged adjacent to the shifting rod (6), and the dial gauge (2) is mounted on the first guide block (8).

6. The cross-rod distance detection device according to claim 3, characterized in that: The connecting rod (7) comprises a first rod (71) and a second rod (72) connected in an L-shape, wherein the connection between the first rod (71) and the second rod (72) is pivotally connected to the base (1), an end of the first rod (71) away from the second rod (72) is connected to or abuts the top rod (9), and an end of the second rod (72) away from the first rod (71) is provided with the movable measuring rod (5).

7. The cross-rod distance detection device according to claim 6, characterized in that: The rocker assembly further comprises: A support block (12) is provided on the base (1); A second elastic member (13) is provided between the support block (12) and the second rod (72), and the second elastic member (13) is configured to have a tendency to drive the connecting rod (7) to rotate and to cause the movable measuring rod (5) on the connecting rod (7) to clamp the gear (100).

8. The cross-rod distance detection device according to any one of claims 1 to 7, characterized in that: The carrier (3) is provided with at least two avoidance grooves (31) spaced apart along the circumferential direction, and the avoidance grooves (31) pass through both ends of the carrier (3) in the height direction; the movable measuring rod (5) passes through the corresponding avoidance grooves (31) and protrudes from the upper surface of the carrier (3).

9. The cross-rod distance detection device according to claim 8, characterized in that: The cross-rod distance detection device further comprises a base (14), wherein the base (14) is arranged on the base (1), and the carrier (3) is arranged on the base (1); The carrier (3) is provided with three avoidance grooves (31), one end of the fixed measuring rod (4) is provided on the base (14), and the other end of the fixed measuring rod (4) passes through the corresponding avoidance groove (31) and protrudes from the upper surface of the carrier (3).

10. The cross-rod distance detection device according to claim 8, characterized in that: The carrier (3) is provided with a clearance hole (32), and the clearance hole (32) can avoid the hub of the gear (100).

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