A detection device

Abstract

The present application relates to the technical field of precision measurement, and relates to a detection device, which comprises a base station, a detection mechanism and a detection unit, wherein the base station is provided with a detection area and is defined with a positioning end face in the horizontal direction; the detection mechanism is fixed on the base station and comprises the detection unit and a driving unit; the detection unit is located above the detection area; the detection unit is provided with an abutting piece, a first detection head and a second detection head; the first detection head and the second detection head are both capable of moving away from or approaching the abutting piece, and the first detection head and the second detection head are both located above the first ball channel probe head and the second ball channel probe head; wherein the first distance between the first detection head and the second detection head is greater than or equal to the second distance between the first ball channel probe head and the second ball channel probe head. Thus, the problem of how to quickly realize the center height of the connecting position between the straight line part and the arc line part in the end face of the clock-shaped shell in the existing measuring gauge is solved.

Description

Technical Field

[0001] This invention relates to the field of precision measurement technology, and more specifically, to a detection device. Background Technology

[0002] The bell-shaped shell, mounted on a ball-cage universal joint, serves as a steering connection. For bell-shaped shells with a hemispherical inner end face, after the spherical and inner end faces are machined, the current methods for inspecting the distance between the center heights at the connection point of the straight and curved sections on the inner end face mostly employ coordinate measuring machines (CMMs) or other complex inspection tools. However, both CMMs and other complex tooling methods have limitations. Data acquisition relies on evaluation from a few points, resulting in low reliability in practical use, low inspection efficiency, and cumbersome process quality control. These are the shortcomings of existing technologies. Summary of the Invention

[0003] To address the problem of how to quickly measure the center height at the connection point between the straight and curved sections of the inner end face of a bell-shaped shell in existing measuring fixtures, this invention provides a detection device.

[0004] In a first aspect, the present invention provides a detection device, comprising:

[0005] A base, on which a detection area is provided, and a positioning end face is defined along the horizontal direction of the detection area;

[0006] A testing mechanism, fixed on a base, includes a testing unit and a driving unit that drives the testing unit to move vertically. The testing unit is located above the area to be tested and has a contact member, a first testing head, and a second testing head. A first ball track probe and a second ball track probe are provided at the bottom of the contact member. The first ball track probe and the second ball track probe are symmetrically arranged along a first direction, and the first testing head and the second testing head are symmetrically arranged along a second direction. The first testing head and the second testing head can be relatively far away from or close to the contact member, and both the first testing head and the second testing head are located above the first ball track probe and the second ball track probe.

[0007] Wherein, the first distance between the first detection head and the second detection head is greater than or equal to the second distance between the first ball track probe and the second ball track probe.

[0008] In some embodiments, the detection unit further includes a positioning block, a first measuring element, and a second measuring element. The abutment is connected to the bottom of the positioning block. The first end of the first measuring element and the first end of the second measuring element are both movably connected to the positioning block. The second end of the first measuring element and the second end of the second measuring element are both arranged downwards. The first measuring element and the second measuring element are respectively located on opposite sides of the abutment along a second direction. The first measuring element and the second measuring element are respectively used to drive the first detection head and the second detection head so that they can move away from or closer to the abutment.

[0009] In some embodiments, the abutment includes a body portion connected to the bottom of the positioning block. The bottom end of the body portion extends to opposite sides along a first direction, with a first extension portion and a second extension portion respectively. The first ball track probe is disposed on the first extension portion and arranged at one end away from the side where the body portion is located, and the second ball track probe is disposed on the second extension portion and arranged at one end away from the side where the body portion is located.

[0010] In some embodiments, the first extension portion extends outward from the top of the end away from the main body portion and is provided with a first limiting portion. The first limiting portion forms a first limiting channel along the second direction. The end of the first limiting channel away from the main body portion forms a first limiting step. The first detection head is movably disposed in the first limiting channel. The first limiting step is used to limit the displacement of the first detection head along the second direction.

[0011] The first measuring element drives the first detection head to move toward the side where the first limiting step is located, so that part of the first detection head is exposed outside the first limiting channel.

[0012] In some embodiments, the second extension portion extends outward from the top of the end away from the main body portion and is provided with a second limiting portion. The second limiting portion forms a second limiting channel along a second direction. The end of the second limiting channel away from the main body portion forms a second limiting step. The second detection head is movably disposed within the second limiting channel. The second limiting step is used to limit the displacement of the second detection head along the second direction.

[0013] The second measuring element drives the second detection head to move toward the side where the second limiting step is located, so that part of the second detection head is exposed outside the second limiting channel.

[0014] In some embodiments, the first measuring member includes a first body portion and a first contact portion, the top of the first body portion is hinged to the positioning block, and the first contact portion extends along a second direction to the bottom of the first body portion toward the end away from the body portion, and the first contact portion abuts against the first detection head;

[0015] The detection unit further includes a first telescopic control lever and a first elastic element. One end of the first elastic element is connected to the main body, and the other end of the first elastic element abuts against the first main body or the first abutting part. One end of the first telescopic control lever is fixed to the first main body, and the other end of the first telescopic control lever is exposed outside the positioning block.

[0016] In some embodiments, the second measuring element includes a second main body and a second contact portion. The top of the second main body is hinged to the positioning block, and the second contact portion extends along a second direction to the bottom of the second main body toward the end away from the main body. The second contact portion abuts against the second detection head.

[0017] The detection unit further includes a second telescopic control lever and a second elastic element. One end of the second elastic element is connected to the main body, and the other end of the second elastic element abuts against the second main body or the second abutting part. One end of the second telescopic control lever is fixed to the second main body, and the other end of the second telescopic control lever is exposed outside the positioning block.

[0018] In some embodiments, the detection mechanism further includes a first sensor and a second sensor, wherein the first sensor is used to measure the distance the first ball track probe moves in the vertical direction, and the second sensor is used to measure the distance between the first detection head and the second detection head.

[0019] In some embodiments, the workpiece is placed on the area to be inspected, and the workpiece has a receiving groove. The receiving groove is arranged in a detection unit. The inner surface of the receiving groove has a straight part and an arc part. The straight part is located above the arc part. The connection between the straight part and the arc part is a smooth transition connection. The value range of the height H between the connection between the straight part and the arc part and the positioning end face is: H=H1-H2+H3.

[0020] Wherein, H1 is the height from the center of the first ball track probe to the positioning end face when the detection unit rises to its highest point;

[0021] H2 is the distance the detection unit moves when it descends to the lowest point. At this time, the first ball track probe and the second ball track probe are in contact with the curved part, and the first detection head and the second detection head are in contact with the straight part.

[0022] H3 is the height between the connection point of the straight section and the curved section and the center of the fairway probe. H3 is obtained by the center distance M1 between the first fairway probe and the second fairway probe and the center distance M2 between the first detection head and the second detection head according to the first rule.

[0023] In some embodiments, the first rule is: In the formula, R1 is the radius of the first detection head and the second detection head, and R2 is the radius of the first ball track probe and the second ball track probe.

[0024] In some embodiments, the drive unit includes a column, a lifting control lever, a first connector, and a second connector. The column is vertically connected to the base. A slide rail is formed vertically at one end of the column facing the area to be detected. A slider is connected to the positioning block, and the positioning block is movably connected to the slide rail via the slider. A first fitting portion is formed in the middle of the lifting control lever, and the lifting control lever is hinged to the top of the column via the first fitting portion. One end of the lifting control lever is hinged to one end of the first connector, the other end of the first connector is hinged to one end of the second connector, and the other end of the second connector is connected to the top of the positioning block.

[0025] To address the problem of how to quickly measure the center height at the connection point between the straight and curved sections of the inner end face of a bell-shaped shell in existing measuring fixtures, this invention offers the following advantages:

[0026] The technical solution of this invention utilizes a test area set on a base, with the test unit of the testing mechanism positioned above the test area. A drive unit drives the test unit to move vertically upwards, allowing the workpiece to be placed within the test area. The first and second ball track probes of the test unit are located at the bottom of the contact member. These probes can move relative to or away from the contact member, engaging with each other to place the workpiece into the test area. The test unit extends into the workpiece's receiving groove, causing the first and second ball track probes to contact the curved portion and the straight portion. The change in the center distance between the two probes at the straight portion determines the mathematical function relationship between the measured value and the radii of the two ball track probes. This allows for rapid measurement of the center height at the connection point between the straight and curved portions of the inner end face of a bell-shaped shell. Furthermore, it can also measure workpieces with different inner diameters and shapes that are not perfectly spherical, improving the versatility of the testing device. Attached Figure Description

[0027] Figure 1 A schematic diagram of the structure of a detection device is shown.

[0028] Figure 2 It shows Figure 1 A schematic diagram of another embodiment of the dashed coil D shown;

[0029] Figure 3 It shows Figure 1 The diagram shows the detection device inspecting a workpiece.

[0030] Reference numerals: 10-Detection device; 11-Base; 111-Detection area; 112-Positioning end face; 12-Detection unit; 121-Positioning block; 1211-Slider; 122-Abutting part; 1221-First ball track probe; 1222-Second ball track probe; A-Main body; B1-First extension; B2-Second extension; C1-First limiting part; C2-Second limiting part; 123-First measuring element; E1-First Main body; E2-First contact part; 1231-First detection head; 124-Second measuring element; E3-Second main body; E4-Second contact part; 1241-Second detection head; 125-First telescopic control lever; 126-Second telescopic control lever; 13-Drive unit; 131-Column; 1311-Slide rail; 132-Lifting control lever; 1321-First fitting part; 133-First connecting member; 134-Second connecting member. Detailed Implementation

[0031] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0032] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0033] This embodiment discloses a detection device 10, such as Figure 1 and Figure 2 As shown, the detection device 10 includes: a base 11, on which a detection area 111 is provided, and the detection area 111 is defined with a positioning end face 112 in the horizontal direction;

[0034] The detection mechanism is fixed on the base 11. The detection mechanism includes a detection unit 12 and a driving unit 13 that drives the detection unit 12 to move vertically. The detection unit 12 is located above the area to be detected 111. The detection unit 12 has an abutment 122, a first detection head 1231, and a second detection head 1241. The bottom of the abutment 122 is provided with a first ball track probe 1221 and a second ball track probe 1222. The first ball track probe 1221 and the second ball track probe 1222 are symmetrically arranged along a first direction. The first detection head 1231 and the second detection head 1241 are symmetrically arranged along a second direction. The first detection head 1231 and the second detection head 1241 can be relatively far away from or close to the abutment 122. The first detection head 1231 and the second detection head 1241 are both located above the first ball track probe 1221 and the second ball track probe 1222.

[0035] Wherein, the first distance between the first detection head 1231 and the second detection head 1241 is greater than or equal to the second distance between the first ball track probe 1221 and the second ball track probe 1222.

[0036] In this embodiment, a detection device 10 is provided. The detection device 10 includes a base 11, on which a detection area 111 is disposed. A detection mechanism is detachably connected to the detection area 111. The detection mechanism includes a detection unit 12 and a drive unit 13 that drives the detection unit 12 to move vertically, such that the drive unit 13 drives the detection unit 12 to move towards or away from the side where the detection area 111 is located in the vertical direction. The detection unit 12 includes an abutment 122, a first detection head 1231, and a second detection head 1241. Both the first detection head 1231 and the second detection head 1241 can move relatively away from or towards the side where the abutment 122 is located. In this application, the bottom of the abutment member 122 is further provided with a first ball track probe 1221 and a second ball track probe 1222, such that the first ball track probe 1221 and the second ball track probe 1222 are symmetrically arranged along a first direction, and the first detection head 1231 and the second detection head 1241 are symmetrically arranged along a second direction. In this application, both the first direction and the second direction are preferably arranged parallel to each other along the direction of the horizontal plane, and the first direction and the second direction can be the same or different.

[0037] Specifically, both the first detection head 1231 and the second detection head 1241 are located above the first lane probe 1221 and the second lane probe 1222, and the first distance between the first detection head 1231 and the second detection head 1241 is greater than or equal to the second distance between the first lane probe 1221 and the second lane probe 1222. The first lane probe 1221 and the second lane probe 1222 are detachably and fixedly connected to the abutment member 122. The second distance between the first lane probe 1221 and the second lane probe 1222 is a constant value. Since the first detection head 1231 and the second detection head 1241 can move relative to the side where the abutment member 122 is located along the second direction, the center distance between the first detection head 1231 and the second detection head 1241 is a variable value. In this application, the first distance between the first detection head 1231 and the second detection head 1241 is the effective detection distance, that is, the effective moving distance between the outermost edges of the first detection head 1231 and the second detection head 1241 when they move relative to each other.

[0038] Specifically, this application utilizes a test area 111 set on a base 11, with the test unit 12 of the testing mechanism positioned above the test area 111. The test unit 12 is driven by a drive unit 13 to move vertically upwards, allowing the workpiece (i.e., the bell-shaped shell) to be placed within the test area 111. The first ball track probe 1221 and the second ball track probe 1222 of the test unit 12 are located at the bottom of the contact member 122. The first test head 1231 and the second test head 1241 can move relatively away from or closer to the contact member 122, cooperating with the first ball track probe 1221 and the second ball track probe 1222 to place the workpiece into the test area 111. In the detection zone 111, the driving detection unit 12 extends into the receiving groove of the workpiece, causing the first ball track probe 1221 and the second ball track probe 1222 to abut against the arc portion, and the first detection head 1231 and the second detection head 1241 to abut against the straight portion. By utilizing the change in the size of the center distance between the two detection heads abutting against the straight portion, the mathematical function relationship between the measured value and the radii of the two ball track probes and the radii of the two detection heads can be determined. This allows for the rapid measurement of the center height at the connection position between the straight portion and the arc portion of the inner end face of the bell-shaped shell. At the same time, it can also measure workpieces with different inner diameters and shapes that are not complete spherical surfaces, thus improving the versatility of the detection device 10.

[0039] In some embodiments, such as Figure 3 As shown, the workpiece is placed on the inspection area 111. The workpiece has a receiving groove, which is arranged in the inspection unit 12. The inner surface of the receiving groove has a straight part and an arc part. The straight part is located above the arc part. The connection between the straight part and the arc part is a smooth transition. The value range of the height H between the connection between the straight part and the arc part and the positioning end face 112 is: H = H1 - H2 + H3.

[0040] Wherein, H1 is the height from the center of the first ball track probe 1221 to the positioning end face 112 when the detection unit 12 rises to the highest point;

[0041] H2 is the moving distance when the detection unit 12 descends to the lowest point. At this time, the first ball track probe 1221 and the second ball track probe 1222 abut against the arc part, and the first detection head 1231 and the second detection head 1241 abut against the straight part.

[0042] H3 is the height between the connection point of the straight section and the curved section and the center of the fairway probe. H3 is obtained by the center distance M1 between the first fairway probe 1221 and the second fairway probe 1222 and the center distance M2 between the first detection head 1231 and the second detection head 1241 according to the first rule.

[0043] Furthermore, the first rule is: In the formula, R1 is the radius of the first detection head 1231 and the second detection head 1241, and R2 is the radius of the first ball track probe 1221 and the second ball track probe 1222.

[0044] Furthermore, the detection mechanism also includes a first sensor and a second sensor. The first sensor is used to measure the distance that the first ball track probe 1221 moves in the vertical direction, and the second sensor is used to measure the distance between the first detection head 1231 and the second detection head 1241.

[0045] In this embodiment, the workpiece is placed in the inspection area 111, and the drive inspection unit 12 extends into the workpiece's receiving groove, causing the first ball track probe 1221 and the second ball track probe 1222 to abut against the curved portion. At this time, the first inspection head 1231 and the second inspection head 1241 abut against the straight portion. The center distance M2 between the first inspection head 1231 and the second inspection head 1241 can be obtained by the set sensor, as well as the values ​​of H1 and H2. The value of H3 can be quickly calculated using the above calculation formula, and finally the height H between the connection point of the straight portion and the curved portion and the positioning end face 112 can be obtained. In this application, since the first ball track probe 1221 and the second ball track probe 1222 are symmetrically arranged along the first direction, the radii of the two ball track probes are equal; the first detection head 1231 and the second detection head 1241 are symmetrically arranged along the second direction, that is, the radii of the two detection heads are also equal; preferably, the radius of the first detection head 1231 is also equal to the radius of the first ball track probe 1221, that is, the calculation formula of H3 can be simplified to .

[0046] In some embodiments, the detection unit 12 further includes a positioning block 121, a first measuring element 123, and a second measuring element 124. The abutment 122 is connected to the bottom of the positioning block 121. The first end of the first measuring element 123 and the first end of the second measuring element 124 are movably connected to the positioning block 121. The second ends of the first measuring element 123 and the second measuring element 124 are both arranged downwards. The first measuring element 123 and the second measuring element 124 are located on opposite sides of the abutment 122 along a second direction. The first measuring element 123 and the second measuring element 124 are respectively used to drive the first detection head 1231 and the second detection head 1241 so that they can move away from or closer to the abutment 122.

[0047] Furthermore, the abutment member 122 includes a body part A, which is connected to the bottom of the positioning block 121. The bottom end of the body part A has a first extension part B1 and a second extension part B2 extending from opposite sides along the first direction. The first ball track probe 1221 is disposed on the first extension part B1 and arranged at one end away from the side where the body part A is located. The second ball track probe 1222 is disposed on the second extension part B2 and arranged at one end away from the side where the body part A is located.

[0048] In this embodiment, the above-described configuration allows the two first detection heads 1231 and the second detection head 1241 to move freely relative to the main body A of the abutment member 122 during movement. Furthermore, by configuring the abutment member 122 with a special structure consisting of the main body A, the first extension B1, and the second extension B2, the first measuring member 123 can drive the first detection head 1231 to move freely within the space formed between the main body A and the first extension B1, while the second measuring member 124 can drive the second detection head 1241 to move freely within the space formed between the main body A and the second extension B2. This arrangement effectively optimizes the usable space of the detection unit 12.

[0049] In some embodiments, the first extension portion B1 extends outward from the top of the end away from the main body portion A and is provided with a first limiting portion C1. The first limiting portion C1 forms a first limiting channel along the second direction. The end of the first limiting channel away from the main body portion A forms a first limiting step. The first detection head 1231 is movably disposed in the first limiting channel. The first limiting step is used to limit the displacement of the first detection head 1231 along the second direction.

[0050] The first measuring element 123 drives the first detection head 1231 to move toward the side where the first limiting step is located, so that part of the first detection head 1231 is exposed outside the first limiting channel.

[0051] Furthermore, the first measuring element 123 includes a first main body part E1 and a first contact part E2. The top of the first main body part E1 is hinged to the positioning block 121. The first contact part E2 extends along a second direction from the bottom of the first main body part E1 toward the end away from the main body part A. The first contact part E2 abuts against the first detection head 1231.

[0052] The detection unit 12 further includes a first telescopic control lever 125 and a first elastic element. One end of the first elastic element is connected to the main body A, and the other end of the first elastic element abuts against the first main body E1 or the first abutting part E2. One end of the first telescopic control lever 125 is fixed to the first main body E1, and the other end of the first telescopic control lever 125 is exposed outside the positioning block 121.

[0053] In this embodiment, with the above-described structure, the first telescopic lever 125 can be moved to force the first main body E1 or the first contact part E2 to compress the first elastic member. This causes the first contact part E2 of the first measuring member 123 to move towards the end away from the first limiting channel of the first limiting part C1. This allows the first detection head 1231 to move freely within the first limiting channel, thereby adjusting the movable position of the first detection head 1231. This reduces the distance between the outermost parts of the first detection head 1231 and the second detection head 1241, facilitating their insertion into the workpiece's receiving groove. Both the first and second detection heads 1231 then abut against the straight portion of the inner side of the workpiece's receiving groove, effectively measuring the diameter at the straight portion located on the inner side of the workpiece's receiving groove. Preferably, the other end of the first elastic member abuts against the first main body E1.

[0054] In some embodiments, the second extension portion B2 extends outward from the top of one end away from the main body portion A and is provided with a second limiting portion C2. The second limiting portion C2 forms a second limiting channel along the second direction. The end of the second limiting channel away from the main body portion A forms a second limiting step. The second detection head 1241 is movably disposed in the second limiting channel. The second limiting step is used to limit the displacement of the second detection head 1241 along the second direction.

[0055] The second measuring element 124 drives the second detection head 1241 to move toward the side where the second limiting step is located, so that part of the second detection head 1241 is exposed outside the second limiting channel.

[0056] Furthermore, the second measuring element 124 includes a second main body portion E3 and a second contact portion E4. The top of the second main body portion E3 is hinged to the positioning block 121. The second contact portion E4 extends along a second direction from the bottom of the second main body portion E3 toward the end away from the main body portion A. The second contact portion E4 abuts against the second detection head 1241.

[0057] The detection unit 12 further includes a second telescopic control lever 126 and a second elastic member. One end of the second elastic member is connected to the main body A, and the other end of the second elastic member abuts against the second main body E3 or the second abutting part E4. One end of the second telescopic control lever 126 is fixed to the second main body E3, and the other end of the second telescopic control lever 126 is exposed outside the positioning block 121.

[0058] In this embodiment, with the above-described structure, the second telescopic lever 126 can be moved to force the second main body E3 or the second contact part E4 to compress the second elastic member. This causes the second contact part E4 of the second measuring member 124 to move towards the end away from the second limiting channel of the second limiting part C2, thereby enabling the second detection head 1241 to move freely within the second limiting channel. This allows adjustment of the movable position of the second detection head 1241, reducing the distance between the outermost parts of the first detection head 1231 and the second detection head 1241. This facilitates the insertion of both the second detection head 1241 and the first detection head 1231 into the receiving groove of the workpiece, ensuring that both abut against the straight portion of the inner side of the receiving groove of the workpiece. This achieves an equivalent measurement of the diameter located at the straight portion of the inner side of the receiving groove of the workpiece. In this application, it is preferable that the other end of the second elastic member abuts against the second main body E3.

[0059] In some embodiments, such as Figure 1 As shown, the first detection head 1231 can also be detachably connected to the first contact portion E2 of the first measuring element 123, and the second detection head 1241 can also be detachably connected to the second contact portion E4 of the second measuring element 124. This application is not limited thereto.

[0060] In some embodiments, the drive unit 13 includes a column 131, a lifting control lever 132, a first connector 133, and a second connector 134. The column 131 is vertically connected to the base 11. A slide rail 1311 is formed vertically at one end of the column 131 facing the detection area 111. A slider 1211 is connected to the positioning block 121, and the positioning block 121 is movably connected to the slide rail 1311 through the slider 1211. A first fitting portion 1321 is formed in the middle of the lifting control lever 132. The lifting control lever 132 is hinged to the top of the column 131 through the first fitting portion 1321. One end of the lifting control lever 132 is hinged to one end of the first connector 133, and the other end of the first connector 133 is hinged to one end of the second connector 134. The other end of the second connector 134 is connected to the top of the positioning block 121.

[0061] In this embodiment, the drive unit 13 has two columns 131, which are vertically arranged around the detection area 111 on the base 11. The detection area 111 is fixedly connected to a ball track worktable, so that a workpiece with a non-perfect spherical surface can be mounted on the ball track worktable with the side of the workpiece's receiving groove facing upwards. Each of the two columns 131 has a slide rail 1311 formed vertically at one end facing the detection area 111. Slider blocks 1211 are fixedly connected to opposite sides of the positioning block 121, allowing the positioning block 121 to be respectively fitted onto the two slide rails 1311 via the two sliders 1211. A lifting control lever 132 is hinged to one of the columns 131, so that a first fitting portion 1321 formed in the middle of the lifting control lever 132 is movably disposed at the top of the column 131, thereby allowing the lifting control lever 132 to swing vertically relative to the column 131. In this configuration, the end of the lifting control lever 132 facing the side near the positioning block 121 is hinged to one end of the first connecting member 133, and the other end of the first connecting member 133 is hinged to one end of the second connecting member 134. The other end of the second connecting member 134 is detachably connected to the top of the positioning block 121. With this structural arrangement, the end of the lifting control lever 132 facing away from the positioning block 121 can be swung downwards, causing the lifting control lever 132 to drive the first connecting member 133 and the second connecting member 134 to swing and move upwards. This, in turn, causes the positioning block 121 to move vertically upwards via the slide rail 1311, thus enabling the drive unit 13 to drive the detection unit 12 to move upwards.

[0062] When it is necessary to inspect the workpiece, the lifting control lever 132 can be swung upward toward the end away from the positioning block 121, so that the lifting control lever 132 drives the first connecting member 133 and the second connecting member 134 to swing and move downward, thereby driving the positioning block 121 to move downward in the vertical direction through the slide rail 1311, thus realizing the driving unit 13 driving the detection unit 12 to move downward.

[0063] In summary, through the above structural arrangement, by setting a test area 111 on the base 11, the detection unit 12 of the detection mechanism is positioned above the test area 111, and the detection unit 12 is driven to move vertically upward by the drive unit 13, so that the workpiece can be placed in the test area 111. The first ball track probe 1221 and the second ball track probe 1222 of the detection unit 12 are located at the bottom of the contact member 122, and the first detection head 1231 and the second detection head 1241 can move relatively away from or closer to the contact member 122, cooperating with the first ball track probe 1221 and the second ball track probe 1222 to place the workpiece into the test area. In the inspection area 111, the driving inspection unit 12 extends into the receiving groove of the workpiece, causing the first ball track probe 1221 and the second ball track probe 1222 to abut against the arc portion, and the first inspection head 1231 and the second inspection head 1241 to abut against the straight portion. By utilizing the change in the size of the center distance between the two inspection heads abutting against the straight portion, the mathematical function relationship between the measured value and the radii of the two ball track probes and the radii of the two inspection heads can be determined. This allows for the rapid measurement of the center height at the connection position between the straight portion and the arc portion of the inner end face of the bell-shaped shell. At the same time, it can also measure workpieces with different inner diameters and shapes that are not complete spherical surfaces, thus improving the versatility of the inspection device.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A detection device for detecting workpieces, characterized in that, The utility model relates to a kind of detection device, including: Base, which is provided with a to-be-detected area, and the to-be-detected area defines a positioning end face in the horizontal direction; Detection mechanism, fixed on the base, including a detection unit and a drive unit for driving the detection unit to move in the vertical direction; The detection unit is located above the to-be-detected area, and the detection unit has an abutting piece, a first detection head and a second detection head, the abutting piece is provided with a first ball channel probe and a second ball channel probe at the bottom, the first ball channel probe and the second ball channel probe are symmetrically arranged in the first direction, the first detection head and the second detection head are symmetrically arranged in the second direction, the first detection head and the second detection head can be relatively away from or close to the abutting piece, and the first detection head and the second detection head are located above the first ball channel probe and the second ball channel probe. The first distance between the first detection head and the second detection head is greater than or equal to the second distance between the first ball channel probe and the second ball channel probe. The workpiece is placed on the to-be-detected area, and the workpiece has a receiving groove arranged in the detection unit, and the inner side surface of the receiving groove has a straight line part and an arc part, the straight line part is located above the arc part, the connection between the straight line part and the arc part is smoothly connected, and the height H between the connection of the straight line part and the arc part and the positioning end face is in the range of H=H1-H2+H3. Wherein, H1 is the height from the center of the first ball channel probe to the positioning end face when the detection unit rises to the highest point; H2 is the moving distance when the detection unit drops to the lowest point, at this time, the first ball channel probe and the second ball channel probe are in contact with the arc part, and the first detection head and the second detection head are in contact with the straight line part; H3 is the height between the connection of the straight line part and the arc part and the center of the first ball channel probe and the second ball channel probe, which is obtained by the first rule from the center distance M1 of the first ball channel probe and the second ball channel probe and the center distance M2 of the first detection head and the second detection head.

2. The detection device of claim 1, wherein, The detection unit further includes a positioning block, a first measuring member and a second measuring member, the abutting piece is connected to the bottom of the positioning block, the first end of the first measuring member and the first end of the second measuring member are movably connected to the positioning block, the second end of the first measuring member and the second end of the second measuring member are arranged in an extending manner downward, and the first measuring member and the second measuring member are respectively located on the opposite sides of the abutting piece in the second direction, and the first measuring member and the second measuring member are respectively used to drive the first detection head and the second detection head to be relatively away from or close to the abutting piece.

3. The detection device of claim 2, wherein, The abutting piece includes a body part, the body part is connected to the bottom of the positioning block, the first extension and the second extension are respectively arranged on the opposite sides of the body part in the first direction, the first ball channel probe is arranged on the first extension and away from one end of the side where the body part is located, and the second ball channel probe is arranged on the second extension and away from one end of the side where the body part is located.

4. The detection device of claim 3, wherein, The first extension portion extends outward from the top of the end away from the main body portion and is provided with a first limiting portion. The first limiting portion forms a first limiting channel along the second direction. The end of the first limiting channel away from the main body portion forms a first limiting step. The first detection head is movably disposed in the first limiting channel. The first limiting step is used to limit the displacement of the first detection head along the second direction. The first measuring element drives the first detection head to move toward the side where the first limiting step is located, so that part of the first detection head is exposed outside the first limiting channel.

5. The detection device of claim 3, wherein, The second extension extends outward from the top of the end away from the main body and is provided with a second limiting part. The second limiting part forms a second limiting channel along the second direction. The end of the second limiting channel away from the main body forms a second limiting step. The second detection head is movably disposed in the second limiting channel. The second limiting step is used to limit the displacement of the second detection head along the second direction. The second measuring element drives the second detection head to move toward the side where the second limiting step is located, so that part of the second detection head is exposed outside the second limiting channel.

6. The detection device of claim 4, wherein, The first measuring element includes a first main body and a first contact portion. The top of the first main body is hinged to the positioning block. The first contact portion extends along a second direction from the bottom of the first main body toward the end away from the main body. The first contact portion abuts against the first detection head. The detection unit further includes a first telescopic control lever and a first elastic element. One end of the first elastic element is connected to the main body, and the other end of the first elastic element abuts against the first main body or the first abutting part. One end of the first telescopic control lever is fixed to the first main body, and the other end of the first telescopic control lever is exposed outside the positioning block.

7. The detection device of claim 5, wherein, The second measuring element includes a second main body and a second contact portion. The top of the second main body is hinged to the positioning block. The second contact portion extends along a second direction to the bottom of the second main body towards the end away from the main body. The second contact portion abuts against the second detection head. The detection unit further includes a second telescopic control lever and a second elastic element. One end of the second elastic element is connected to the main body, and the other end of the second elastic element abuts against the second main body or the second abutting part. One end of the second telescopic control lever is fixed to the second main body, and the other end of the second telescopic control lever is exposed outside the positioning block.

8. The detection device of claim 1, wherein, The detection mechanism further includes a first sensor and a second sensor. The first sensor is used to measure the distance the first ball track probe moves in the vertical direction, and the second sensor is used to measure the distance between the first detection head and the second detection head.

9. The detection device of claim 1, wherein, The first rule is: where R1 is the radius of the first probe head and the second probe head, and R2 is the radius of the first ballbar probe head and the second ballbar probe head.

10. The detection device of claim 2, wherein, The drive unit includes a column, a lifting control lever, a first connector, and a second connector. The column is vertically connected to the base. A slide rail is formed vertically at one end of the column facing the area to be detected. A slider is connected to the positioning block, and the positioning block is movably connected to the slide rail via the slider. A first fitting portion is formed in the middle of the lifting control lever, and the lifting control lever is hinged to the top of the column via the first fitting portion. One end of the lifting control lever is hinged to one end of the first connector, the other end of the first connector is hinged to one end of the second connector, and the other end of the second connector is connected to the top of the positioning block.

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