Target of laser tracking measurement system and laser tracking measurement system

Abstract

The invention discloses a target of a laser tracking measurement system and the laser tracking measurement system, and relates to the technical field of laser measurement tools, the target of the laser tracking measurement system comprises a main body, and the main body comprises a first locking assembly; the probe is provided with a contact end; the probe comprises a second locking assembly; the first locking assembly comprises a lock head, one end of the lock head is provided with a locking part, and the locking part comprises a connecting section and a locking protrusion; the second locking assembly comprises a lock catch mounting seat and a lock catch, and the lock catch is movably arranged on the lock catch mounting seat; the lock catch mounting seat is provided with a first channel; the lock catch is provided with a locking connection cavity, the locking connection cavity is used for containing the locking connection part, the locking connection cavity is provided with an opening, the opening comprises a receding opening part allowing the locking connection part to be inserted into or leave the locking connection cavity and a necking part capable of limiting the locking connection protrusion, and the lock catch is opposite to the first channel by movably switching the receding opening part or the necking part. The space coordinates of the measurement position where the light beam cannot be received can be conveniently detected by using the measuring needle, and the universality of the target can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of laser measurement tools, and in particular to a target of a laser tracking measurement system and a laser tracking measurement system. Background Art

[0002] Laser tracker is a metrological inspection tool that can be used for applications such as dimension measurement, installation, positioning, calibration and reverse engineering. During the operation of the laser tracker, the target's retroreflector is used to reflect the light beam emitted by the laser tracker, so that the light beam is reflected to the laser tracker in the opposite direction of the incident direction, so that the laser tracker can calculate and determine the spatial coordinates of the target based on the incident light beam.

[0003] In actual application scenarios, if it is necessary to measure the spatial coordinates of multiple positions on the surface of a workpiece, the target can be set on the surface of the workpiece, and the spatial coordinates of the detection position can be determined based on the spatial coordinates of the target. However, some positions on the workpiece, such as countersunk holes, grooves, or the back, may not be able to directly receive the light beam, so it is difficult to set targets at these positions to determine the spatial coordinates of the position, and the versatility of the target needs to be improved. Summary of the invention

[0004] In order to improve the versatility of the target in different measurement scenarios, the present application provides a target of a laser tracking measurement system and a laser tracking measurement system.

[0005] According to the first aspect, an embodiment provides a target of a laser tracking measurement system, comprising:

[0006] A main body, the main body comprising at least one first locking assembly;

[0007] and at least one measuring needle, the measuring needle having a contact end, the contact end being used to abut against a measuring position of a workpiece; the measuring needle comprising a second locking assembly, the second locking assembly being used to detachably cooperate with the first locking assembly so that the measuring needle can be detachably arranged on the main body;

[0008] The first locking assembly includes a lock head, one end of which has a locking portion, and the locking portion includes a connecting section and a locking protrusion provided on a side of the connecting section;

[0009] The second locking assembly includes a lock buckle mounting seat and a lock buckle, the lock buckle is movably arranged on the lock buckle mounting seat, and the lock buckle mounting seat is provided with a first channel; the lock buckle is provided with a locking cavity, the locking cavity is used to accommodate the locking part, the locking cavity has an opening, the opening includes an avoidance portion allowing the locking part to insert into or leave the locking cavity and a shrinkage portion capable of limiting the locking protrusion, and the lock buckle movably switches the avoidance portion or the shrinkage portion to be opposite to the first channel.

[0010] In one embodiment, the size of the avoidance portion is not less than the outer contour size of the locking portion, so that the locking portion can enter the locking cavity through the avoidance portion; the width of the necked portion is less than the width of the locking portion along the protruding direction of the locking protrusion, and is not less than the width of the connecting section along the protruding direction of the locking protrusion, so that the locking portion can enter the necked portion from the avoidance portion and be locked in the locking cavity corresponding to the necked portion.

[0011] In one embodiment, the first locking assembly further includes a lock head mounting seat and an elastic member, wherein the lock head mounting seat is mounted on the main body, the lock head is flexibly connected to the lock head mounting seat via the elastic member, and the elastic member applies an elastic force to the lock head axially away from the lock buckle along the first channel.

[0012] In one embodiment, the lock also includes a locking rod portion and a positioning member, the locking rod portion is connected between the positioning member and the connecting section; the lock mounting seat has a locking through hole for the locking rod portion to movably pass through, and the lock mounting seat is provided with a limiting member for limiting the axial range of movement of the positioning member along the locking through hole; the elastic member is arranged between the positioning member and the lock mounting seat, and the elastic member is used to apply an elastic force to the positioning member to move in a direction away from the lock mounting seat.

[0013] In one embodiment, the lock mount is provided with a second channel, the second channel and the first channel are arranged to intersect and communicate with each other, the lock is rotatably arranged in the second channel, the lock can rotate around the circumference of the second channel, the avoidance portion and the necking portion are arranged around the circumference of the lock, and the rotation of the lock can switch the avoidance portion or the necking portion to be opposite to the first channel.

[0014] In one embodiment, the locking protrusion has a locking arc surface on one side close to the connecting section, and when the lock buckle is in a position relative to the necked portion and the first channel, the locking arc surface is pressed tightly against the edge of the necked portion under the elastic force of the elastic member.

[0015] In one embodiment, when the lock buckle is in a position relative to the avoidance portion and the first channel, the vertex of the locking arc surface close to the side of the connecting section is flush with the edge of the avoidance portion or closer to the first channel than the edge of the avoidance portion, and the center of the locking arc surface is closer to the first channel than the axis of the cavity wall of the locking cavity.

[0016] In one embodiment, a rotation limiting structure is cooperatively provided on the lock buckle and the lock buckle mounting seat, and the rotation limiting structure is used to limit the rotation range of the lock buckle.

[0017] In one embodiment, one of the lock mounting seat and the lock buckle mounting seat is provided with a first power connector, and the other is provided with a second power connector. The main body can supply power to the first power connector or the second power connector installed on the lock mounting seat. When the measuring probe is installed on the main body, the first power connector and the second power connector are electrically connected so that the main body can identify the measuring probe.

[0018] According to a second aspect, an embodiment provides a laser tracking and measurement system, comprising a laser tracker and a target of the laser tracking and measurement system described in any one of the above embodiments.

[0019] According to the target of the laser tracking measurement system of the above embodiment, by setting the measuring needle, since the contact end of each measuring needle has a fixed relative position with the main body, during detection, the main body can be set at a position where the light beam can be received, and the contact end of the measuring needle is made to abut against the measuring position of the workpiece where the light beam cannot be received, so that the spatial coordinates of the measuring position can be detected and calculated; and by setting the first locking component and the second locking component, it is easy to replace the measuring needles of different models to meet the detection requirements of different measurement scenarios, which helps to fully improve the versatility of the target. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a target of a laser tracking and measurement system according to an embodiment;

[0021] Figure 2 It is a structural schematic diagram of the cooperation state of the first locking component and the second locking component of an embodiment;

[0022] Figure 3 is a structural schematic diagram of a first locking assembly according to an embodiment;

[0023] Figure 4 is a structural schematic diagram of a second locking assembly according to an embodiment;

[0024] Figure 5 for Figure 4 A perspective structural diagram of the second locking assembly;

[0025] Figure 6 is a schematic structural diagram of a lock buckle according to an embodiment;

[0026] Figure 7 It is a structural schematic diagram of a lock in a buckled state and a released state according to an embodiment;

[0027] Figure 8 The figure is a schematic structural diagram of a laser tracking measurement system according to an embodiment.

[0028] In the figure, 1, target; 2, laser tracker;

[0029] 100, main body; 110, retroreflector; 120, first locking assembly; 121, lock head; 1211, locking portion; 12111, connecting section; 12112, locking protrusion; 12113, locking arc surface; 1212, locking rod portion; 122, lock head mounting seat; 1221, locking through hole; 1222, positioning hole; 1223, protrusion structure; 12231, guiding surface; 1224, first electrical connection member;

[0030] 200, measuring needle; 210, contact end; 220, second locking component; 221, lock mounting seat; 2211, first channel; 2212, second channel; 2213, positioning pin; 2214, positioning structure; 22141, positioning body; 22142, positioning gap; 2215, second power connection member; 222, lock; 2221, locking cavity; 2222, avoidance portion; 2223, shrinkage portion; 2224, annular groove; 2225, protrusion; 22251, limiting slide groove; 2226, exposed portion; 2227, locking actuator; 22271, screw hole. DETAILED DESCRIPTION

[0031] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0032] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0033] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0034] During the operation of the laser tracker 2, the reflector 110 of the target 1 needs to be used to reflect the light beam emitted by the laser tracker 2 so that the light beam is reflected to the laser tracker 2 in the direction opposite to the incident direction, and the laser tracker 2 can determine the spatial coordinates of the target 1 based on the incident light beam. In practical applications, if it is necessary to measure the spatial coordinates of multiple positions on the surface of the workpiece, the target 1 can be set on the surface of the workpiece, and the spatial coordinates of the position can be determined based on the spatial coordinates of the target 1. However, some positions of the workpiece to be measured may be located at positions such as countersunk holes, grooves, or backs that cannot directly receive the light beam, so it is impossible to set the target 1 at these positions to determine the spatial coordinates of the position.

[0035] In the embodiment of the present application, a stylus 200 is provided on the main body 100 of the target 1. Since the contact end 210 of the stylus 200 has a fixed relative position with the main body 100, during detection, the main body 100 can be set at a position where the light beam can be received, and the contact end 210 of the stylus 200 is abutted against a measuring position of the workpiece where the light beam cannot be received, so as to calculate the spatial coordinates of the measuring position according to the spatial coordinates of the retroreflector 110 and the relative position between the contact end 210 of the stylus 200 and the retroreflector 110; and, by providing the first locking assembly 120 and the second locking assembly 220, it is convenient to replace stylus 200 of different models to adapt to the detection requirements of different measurement scenarios and different detection positions, which helps to fully improve the versatility of the target 1.

[0036] In one embodiment, a target of a laser tracking measurement system is disclosed, please refer to Figure 1-Figure 7 The target of the laser tracking measurement system includes a main body 100 and at least one measuring needle 200 arranged on the main body 100, wherein the main body 100 includes at least one first locking component 120, and the measuring needle 200 has a contact end 210, and the contact end 210 is used to abut the measuring position of the workpiece; the measuring needle 200 includes a second locking component 220, and the second locking component 220 is used to detachably cooperate with the first locking component 120, so that the measuring needle 200 can be detachably arranged on the main body 100.

[0037] For example, please refer to Figure 1 and Figure 2, the measuring needle 200 is a long strip structure, and the contact end 210 and the second locking component 220 are respectively arranged at the two ends of the measuring needle 200. The main body 100 is provided with a retroreflector 110 and at least one first locking component 120, wherein the retroreflector 110 is located on one side of the main body 100 so as to receive and reflect the light beam. The first locking component 120 can be a single part, and the number and position of the first locking component 120 can be flexibly set according to the design and use requirements, for example: the first locking component 120 is provided with two groups, one group is arranged at the top of the main body 100 in the perspective of the figure, and the other group is arranged on the side of the main body 100 away from the retroreflector 110, and the setting directions of the two groups of first locking components 120 are vertical or approximately vertical, so that the measuring needle 200 can be installed respectively along the height direction and width direction of the main body 100 in the figure, so as to realize the detection of the measurement position of the workpiece that cannot receive the light beam at different orientations. In other embodiments, the first locking components 120 may also be provided in one group, three groups or other numbers, and the setting position and setting angle of the first locking components 120 may also be adjusted as needed to meet the needs of the detection scene.

[0038] In one embodiment, please refer to Figure 3 The first locking assembly 120 includes a locking head 121, and one end of the locking head 121 has a locking portion 1211. In some embodiments, the locking portion 1211 includes a connecting section 12111 and a locking protrusion 12112 provided on the side of the connecting section 12111. For example, the locking protrusions 12112 are symmetrically provided on the opposite sides of the connecting section 12111, and the locking protrusions 12112 and one end of the connecting section 12111 can jointly form a ball-shaped structure that is easy to lock. In other embodiments, the locking protrusion 12112 can also be provided only on one side of the connecting section 12111, and can form a structure that can be locked with the connecting section 12111.

[0039] In one embodiment, please refer to Figure 4 and Figure 5The second locking assembly 220 includes a locking buckle mounting seat 221 and a locking buckle 222. The locking buckle mounting seat 221 is located at one end of the measuring needle 200. The locking buckle 222 is movably arranged on the locking buckle mounting seat 221. The locking buckle mounting seat 221 is provided with a first channel 2211. The first channel 2211 is used for the locking portion 1211 to be inserted into the locking buckle mounting seat 221. In some embodiments, the locking buckle mounting seat 221 is provided with a first channel 2211 and a second channel 2212. The first channel 2211 and the second channel 2212 are arranged to intersect and communicate with each other. The first channel 2211 is used for the locking portion 1211 to be inserted into the second channel 2212. The locking buckle 222 is movably arranged in the second channel 2212, and can lock and release the locking portion 1211 inserted into the second channel 2212 along the first channel 2211, so as to realize the detachable setting of the main body 100 and the measuring needle 200. Exemplarily, the lock buckle mounting seat 221 is a conical structure with a central axis, which is composed of a cylindrical section and a truncated cone section. The first channel 2211 is arranged in the middle of one end of the lock buckle mounting seat 221 along the central axis of the lock buckle mounting seat 221, and the second channel 2212 is arranged on one side of the lock buckle mounting seat 221 and arranged along the radial direction of the lock buckle mounting seat 221. The first channel 2211 and the second channel 2212 are perpendicular to each other and connected. In other embodiments, the lock buckle 222 can also be movably arranged on the outside of the lock buckle mounting seat 221, for example: a buckle is arranged on the side of the lock buckle mounting seat 221 away from the measuring needle 200, and the lock buckle 222 is movably arranged in the buckle. Any setting form and setting position that can make the lock buckle 222 movably arranged on the lock buckle mounting seat 221 are all acceptable.

[0040] In one embodiment, please refer to Figure 5 and Figure 6 The lock buckle 222 is provided with a locking cavity 2221, and the locking cavity 2221 is used to accommodate the locking part 1211. The locking cavity 2221 has an opening, and the opening includes an avoidance portion 2222 that allows the locking part 1211 to insert into or leave the locking cavity 2221 and a shrinkage portion 2223 that can limit the locking protrusion 12112. The lock buckle 222 can be switched to the avoidance portion 2222 or the shrinkage portion 2223 to be opposite to the first channel 2211 through movement.

[0041] Exemplarily, the lock buckle 222 has a release state and a snap-on state. When the lock buckle 222 is in the release state, the avoidance opening portion 2222 is opposite to the first channel 2211, so that the locking portion 1211 can be inserted into or leave the avoidance opening portion 2222; when the lock buckle 222 is in the snap-on state, the necking portion 2223 is opposite to the first channel 2211, and the edge of the necking portion 2223 can limit the locking protrusion 12112 to confine the locking portion 1211 in the necking portion 2223; the lock buckle 222 can flexibly switch between the release state and the snap-on state.

[0042] Before installation, first adjust the lock buckle 222 to the release state, then install the measuring needle 200, so that the locking part 1211 is inserted into the second channel 2212 along the first channel 2211, and inserted into the locking cavity 2221 from the avoidance portion 2222 opposite to the first channel 2211, and then move the lock buckle 222 so that the lock buckle 222 switches to the buckling state, restricting the locking part 1211 in the locking cavity 2221 opposite to the constricted portion 2223, and completing the fixation. When the measuring needle 200 needs to be replaced or removed, just follow the above steps in reverse order, and the disassembly and assembly are simple and convenient.

[0043] In one embodiment, the size of the avoidance portion 2222 is not less than the outer contour size of the locking portion 1211, so that the locking portion 1211 can freely enter or leave the locking cavity 2221 through the avoidance portion 2222; the width of the necked portion 2223 is less than the width of the locking portion 1211 along the protruding direction of the locking protrusion 12112, and is not less than the width of the connecting section 12111 along the protruding direction of the locking protrusion 12112, so that the locking portion 1211 can enter the necked portion 2223 from the avoidance portion 2222, and be locked in the locking cavity 2221 corresponding to the necked portion 2223.

[0044] For example, please refer to Figure 6 The lock buckle 222 is a columnar structure, and has a hollow inner cavity along the axial direction of the second channel 2212, and the hollow inner cavity serves as a locking cavity 2221. An opening is provided on the side surface of the lock buckle 222, and the opening includes an avoidance portion 2222 and a shrinkage portion 2223 arranged along the movable direction of the lock buckle 222.

[0045] For the movable setting method of the lock buckle 222, in some embodiments, please refer to Figure 5 and Figure 6 The lock buckle 222 can be rotatably set in the second channel 2212, and the lock buckle 222 can rotate around the circumference of the second channel 2212. The avoidance portion 2222 and the necking portion 2223 are arranged around the circumference of the lock buckle 222. The rotation of the lock buckle 222 can make the avoidance portion 2222 or the necking portion 2223 switch to be opposite to the first channel 2211, that is, the lock buckle 222 can switch between the engaged state and the released state.

[0046] In other embodiments, the lock buckle 222 can also be slidably disposed in the second channel 2212 axially along the second channel 2212, so that the lock buckle 222 can move axially along the second channel 2212, and the avoidance portion 2222 and the necking portion 2223 are disposed axially along the lock buckle 222, so that the lock buckle 222 can move axially along the second channel 2212 to switch between the engaged state and the released state.

[0047] Taking the lock buckle 222 being rotatably disposed in the second channel 2212 as an example, for example, please refer to Figure 5 and Figure 6 The lock buckle 222 is a cylindrical structure, the second channel 2212 is a circular channel adapted to the lock buckle 222, and the lock buckle 222 is inserted in the second channel 2212 and can rotate around the second channel 2212. The lock buckle 222 can be prevented from slipping out of the second channel 2212 by setting a pin without affecting the rotation of the lock buckle 222. For example, a pin (not shown in the figure) is set on the lock buckle mounting seat 221 to penetrate into the second channel 2212, and an annular groove 2224 is set on the lock buckle 222. The pin is inserted in the annular groove 2224 to axially limit the lock buckle 222, so that the pin can rotate but cannot axially slip out of the second channel 2212. Of course, in other embodiments, an end cover can be added or other structures or structural members can be used to achieve the purpose of preventing the lock buckle 222 from slipping out.

[0048] In one embodiment, a rotation limiting structure is cooperatively provided on the lock buckle 222 and the lock buckle mounting seat 221, and the rotation limiting structure is used to limit the rotation range of the lock buckle 222, so that the user can adjust the lock buckle 222 to a released state, and switch between the released state and the engaged state.

[0049] For some examples, please refer to Figure 4-Figure 6 The rotation limiting structure includes a limiting groove 22251 and a limiting protrusion (not shown in the figure). The lock buckle 222 has a protrusion 2225 located outside the second channel 2212. The limiting groove 22251 is arranged on the protrusion 2225. The limiting groove 22251 is an arc-shaped groove. The axis of the limiting groove 22251 coincides with the rotation axis of the lock buckle 222. The limiting protrusion is fixedly arranged on the lock buckle mounting seat 221 corresponding to the limiting groove 22251. Exemplarily, the protrusion 2225 is a disc-shaped structure, the diameter of the protrusion 2225 is larger than the diameter of the second channel 2212, a mounting plane is provided on the side of the lock buckle mounting seat 221 corresponding to the channel opening of the second channel 2212, the protrusion 2225 is clamped on the mounting plane, the limiting slide groove 22251 is provided near the edge of the protrusion 2225, the limiting protrusion is provided on the mounting plane, and is inserted into the limiting slide groove 22251, the length of the limiting slide groove 22251 corresponds to the rotatable angle of the lock buckle 222, and the angle that the lock buckle 222 needs to rotate can be set according to the range of the avoidance portion 2222 and the constriction portion 2223. For example, if the range of the avoidance portion 2222 and the constriction portion 2223 accounts for about one-fourth of the circumference of the lock buckle 222, the lock buckle 222 can be set to be able to rotate 90°, and the length of the limiting slide groove 22251 can be set to one-fourth of the circumference of the corresponding circle.

[0050] In some other embodiments, other rotation limiting structures that meet the design and use requirements may also be used. For example, the annular groove 2224 set on the lock buckle 222 can be set to a length according to the required rotation angle. For details, please refer to the setting method of the length of the above-mentioned limiting groove 22251, which will not be repeated here.

[0051] In one embodiment, please refer to Figure 4-Figure 6 , the lock buckle 222 can partially expose the second channel 2212 so as to control the rotation of the lock buckle 222 from outside the second channel 2212 to switch the state. Exemplarily, the lock buckle 222 has an exposed portion 2226 extending from the second channel 2212, and the lock buckle 222 can be controlled to rotate by rotating the exposed portion 2226. In addition, in order to facilitate the rotation of the exposed portion 2226, a locking actuator 2227 can also be installed on the exposed portion 2226. In different embodiments, the locking actuator 2227 can be a knob, a handle or other structural member that is easy to operate and rotate. The locking actuator 2227 and the exposed portion 2226 can be connected by plug-in matching, snap-on matching or other matching methods. For example, the locking actuator 2227 has a socket for the exposed portion 2226 to be inserted and snap-on, and the exposed portion 2226 is inserted into the socket. In order to prevent the locking actuator 2227 from falling off, a fastener can also be provided on the locking actuator 2227. For example, a screw hole 22271 connected to the socket is provided on the locking actuator 2227. The fastener is a top screw or a screw. The fastener is installed in the screw hole 22271. One end of the fastener is pressed against the exposed portion 2226 inserted in the socket to achieve a fixed connection between the locking actuator 2227 and the lock buckle 222.

[0052] The second locking assembly 220 includes movable parts such as a lock buckle 222, and there may be gaps between the movable parts and adjacent parts, which may easily cause the measuring needle 200 to loosen; or the gap may be larger when installing a measuring needle 200 with a larger length specification and a heavier weight, and the gap may be smaller when installing a measuring needle 200 with a smaller length specification and a lighter weight, making it difficult to ensure installation accuracy; after the measuring needle 200 is installed, the actual relative position of the contact end 210 of the measuring needle 200 and the reflector 110 of the target 1 may deviate from the design value, resulting in affecting the measurement accuracy.

[0053] In this regard, in one embodiment, please refer to Figure 2 and Figure 3The first locking assembly 120 further includes a lock head mounting seat 122 and an elastic member (not shown in the figure). The lock head mounting seat 122 is mounted on the main body 100. The lock head 121 is flexibly connected to the lock head mounting seat 122 through the elastic member. The elastic member applies an elastic force to the lock head 121 axially away from the lock buckle 222 along the first channel 2211. The elastic force of the elastic member enables the first locking assembly 120 and the second locking assembly 220 to be tightly locked together, which helps to eliminate the influence of the gap on the installation accuracy and improve the measurement accuracy.

[0054] In one embodiment, the lock 121 also includes a locking rod portion 1212 and a positioning member, the locking rod portion 1212 is connected between the positioning member and the connecting section 12111; the lock mounting seat 122 has a locking through hole 1221 for the locking rod portion 1212 to movably pass through, and the lock mounting seat 122 is provided with a limit member (not shown in the figure) for limiting the axial range of movement of the positioning member along the locking through hole 1221, and an elastic member is arranged between the positioning member and the lock mounting seat 122, and the elastic member is used to apply an elastic force to the positioning member to move in a direction away from the lock mounting seat 122.

[0055] Exemplarily, the lock head 121 includes a positioning member and a lock body that are integrally arranged, the positioning member is a clamping plate, and the lock body includes a locking rod portion 1212 and a locking portion 1211 , and the locking rod portion 1212 is connected between the positioning member and the connecting section 12111 .

[0056] The lock head mounting seat 122 has a central axis, the locking through hole 1221 is arranged along the central axis of the lock head mounting seat 122, the locking rod portion 1212 is movably arranged in the locking through hole 1221, the positioning member is located on one side of the locking through hole 1221, and the locking portion 1211 is located on the other side of the locking through hole 1221, wherein the diameter of the circumscribed circle of the positioning member is larger than the diameter of the locking through hole 1221, so that the positioning member cannot enter the locking through hole 1221. The limiting member is two limiting screws arranged on one side of the lock head mounting seat 122 close to the positioning member, and the positioning member is provided with mounting holes on both sides of the locking rod portion 1212 for the screw rod portion of the limiting screw to pass through, the screw head diameter of the limiting screw is larger than the diameter of the mounting hole, and there is a gap between the screw head of the limiting screw and the lock head mounting seat 122 that is larger than the thickness of the positioning member, and the difference between the gap width and the thickness of the positioning member is the maximum movable width of the lock head 121 along the axial direction of the locking through hole 1221.

[0057] The elastic member is a compression spring, which is sleeved on the lock rod portion 1212. One end of the elastic member abuts against the positioning member, and the other end abuts against the lock head mounting seat 122, so as to apply an elastic force to the lock head 121 through the positioning member to move axially along the first channel 2211 away from the lock head mounting seat 122.

[0058] In other embodiments, the limiting member may also be a blocking structure or other component or structure that can limit the positioning member and is disposed on the side of the clamping plate away from the lock mounting seat 122. The elastic member may also be a disc spring, a rubber pad or other elastic material or structural member. The number and location of the elastic member may be adjusted as required, as long as the required elastic force can be provided to the positioning member.

[0059] In one embodiment, please refer to Figure 7 The locking protrusion 12112 has a locking arc surface 12113 on one side close to the connecting section 12111, and the lock buckle 222 is located at a position opposite to the necked portion 2223 and the first channel 2211, that is, when in a buckled state, the locking arc surface 12113 is pressed against the edge of the necked portion 2223 under the elastic force of the elastic member.

[0060] In some further embodiments, when the lock buckle 222 is at a position where the avoidance opening portion 2222 and the first channel 2211 are opposite, the vertex of the locking arc surface 12113 close to the connecting section 12111 is flush with the edge of the avoidance opening portion 2222 or closer to the first channel 2211 than the edge of the avoidance opening portion 2222, and the center of the locking arc surface 12113 is closer to the first channel 2211 than the axis of the cavity wall of the locking cavity 2221. Figure 7 Taking the perspective shown as an example, when the lock buckle 222 is in a released state, the vertex of the locking arc surface 12113 close to the connecting section 12111 is not lower than the edge of the avoidance portion 2222, and the center of the locking arc surface 12113 is higher than the center of the cavity wall of the locking cavity 2221. In this way, when locking, as the lock buckle 222 rotates, the part of the locking cavity 2221 opposite to the first channel 2211 transitions from the avoidance portion 2222 to the necking portion 2223, and the locking arc surface 12113 gradually contacts the edge of the necking portion 2223. Under the pressure of the edge of the necking portion 2223, the lock head 121 moves as a whole toward the locking cavity 2221, and the gap between the positioning member and the lock head mounting seat 122 is reduced until the vertex of the locking arc surface 12113 close to the side of the connecting section 12111 contacts the edge of the necking portion 2223. At this time, the lock head 121 is subjected to the pulling force from the lock buckle 222 and the elastic force in the opposite direction from the elastic member, thereby tightly combining the first locking component 120 and the second locking component 220 together.

[0061] For a further embodiment, please refer to Figure 7 The curvature of the locking arc surface 12113 is adapted to the curvature of the cavity wall of the locking cavity 2221. For example, the vertex of the locking arc surface 12113 close to the connecting section 12111 can be tangent to the cavity wall of the locking cavity 2221 to facilitate the rotation of the lock buckle 222, reduce wear and avoid rotation jamming.

[0062] In order to facilitate the docking and locking of the lock head 121 and the lock buckle 222, in one embodiment, please refer to Figure 3-Figure 5 One of the lock head mounting seat 122 and the lock buckle mounting seat 221 is provided with at least one positioning pin 2213, and the other is provided with a positioning hole 1222 for inserting the positioning pin 2213, so as to position the lock head mounting seat 122 and the lock buckle mounting seat 221 circumferentially.

[0063] Exemplarily, the lock buckle mounting seat 221 and the lock head mounting seat 122 both have a docking surface for docking with each other, and two positioning pins 2213 are arranged on the docking surface of the lock buckle mounting seat 221 at intervals, and the two positioning pins 2213 are arranged on the circumference of the first channel 2211, and two positioning holes 1222 are arranged on the lock head mounting seat 122 corresponding to the two positioning pins 2213, and the two positioning holes 1222 are arranged on the circumference of the lock head 121. Through the docking and cooperation of the positioning pins 2213 and the positioning holes 1222, the circumferential positioning of the lock head mounting seat 122 and the lock buckle mounting seat 221 can be achieved.

[0064] In other embodiments, the positioning pin 2213 may be disposed on the lock mounting seat 122, and the positioning hole 1222 may be disposed on the lock buckle mounting seat 221. The number and specific location of the positioning pins 2213 and the positioning holes 1222 may be disposed in different ways as required.

[0065] Although the positioning pin 2213 and the positioning hole 1222 cooperate to achieve circumferential positioning of the lock head mounting seat 122 and the lock buckle mounting seat 221, the positioning accuracy is limited due to the influence of processing tolerance or matching clearance.

[0066] In order to further improve the positioning accuracy, in one embodiment, please refer to Figure 3-Figure 5 One of the lock head mounting seat 122 and the lock buckle mounting seat 221 is provided with at least one protruding structure 1223, and the other is provided with a positioning structure 2214 adapted to the protruding structure 1223, the protruding structure 1223 has a guide surface 12231, and the positioning structure 2214 is formed with a positioning gap 22142, and the positioning gap 22142 is used to position the guide surface 12231 so that the lock head mounting seat 122 and the lock buckle mounting seat 221 are aligned.

[0067] In one embodiment, please refer to Figure 3-Figure 5 The cross-section of the guide surface 12231 is arc-shaped or V-shaped; the positioning structure 2214 includes two positioning bodies 22141 arranged side by side, and the sides of the two positioning bodies 22141 close to each other have positioning surfaces for abutting against the guide surface 12231, and the positioning surfaces are arc surfaces or inclined surfaces, and a positioning gap 22142 is formed between the two positioning surfaces.

[0068] Exemplarily, three groups of protrusion structures 1223 are arranged at intervals on the docking surface of the lock mounting seat 122, including cylindrical protrusions embedded in the lock mounting seat 122, the axis of the cylindrical protrusions is arranged along the radial direction of the docking surface, and the cylindrical protrusions have arc-shaped guide surfaces 12231 protruding from the docking surface. Three groups of positioning structures 2214 are arranged on the docking surface of the lock mounting seat 221 corresponding to the protrusion structures 1223. The positioning structure 2214 includes two hemispherical positioning bodies 22141 embedded in the docking surface of the lock mounting seat 221. The two positioning bodies 22141 are arranged side by side along the circumferential direction of the docking surface of the lock mounting seat 221. The hemispherical surfaces of the two positioning bodies 22141 are arc-shaped positioning surfaces, and a positioning gap 22142 is formed between the two positioning bodies 22141.

[0069] In other embodiments, the protruding structure 1223 may also be a prism having a V-shaped guide surface 12231; it may also be a sphere or other shaped protruding structure 1223; the positioning structure 2214 may also include a groove, for example: a groove with a V-shaped or inverted trapezoidal cross section, the groove walls on both sides of the groove are used to abut against the guide surface 12231, and a positioning gap 22142 is formed between the groove walls on both sides of the groove. In addition, the protruding structure 1223 may also be arranged on the lock mounting seat 221, and the positioning structure 2214 is arranged on the lock head mounting seat 122. The number and specific arrangement positions of the protruding structures 1223 and the positioning structures 2214 may be arranged differently according to needs.

[0070] In one embodiment, please refer to Figure 3-Figure 5 In order to facilitate the determination of the relative position between the retroreflector 110 and the contact end 210, one of the lock mounting seat 122 and the lock buckle mounting seat 221 is provided with a first power connector 1224, and the other is provided with a second power connector 2215. The main body 100 can supply power to the first power connector 1224 or the second power connector 2215 installed on the lock mounting seat 122. When the measuring probe 200 is installed on the main body 100, the first power connector 1224 and the second power connector 2215 are electrically connected so that the main body 100 can identify the measuring probe 200.

[0071] Exemplarily, two groups of first power connectors 1224 are arranged at intervals on the docking surface of the lock mounting seat 122, and two groups of second power connectors 2215 are arranged at intervals on the docking surface of the lock mounting seat 221 corresponding to the first power connectors 1224. The first power connector 1224 can be a contact, and the second power connector 2215 can be a contact point. The second power connector 2215 can be connected to the power supply in the main body 100 or the external power supply of the main body 100, so that the first power connector 1224 and the second power connector 2215 can form an electrical signal after contact, so that the main body 100 or the matching laser tracker 2 can confirm the model of the installed measuring needle 200, and then calculate the spatial coordinates of the detection position.

[0072] In other embodiments, the locations of the first power connector 1224 and the second power connector 2215 may be interchanged, and other conductive elements capable of conducting current and generating electrical signals may be used as required.

[0073] In one embodiment of a laser tracking measurement system, please refer to Figure 8 The laser tracking and measuring system includes a laser tracker 2 and a target 1 of the laser tracking and measuring system of any one of the above embodiments.

[0074] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. The target of the laser tracking measurement system is characterized by: include: A main body, the main body comprising at least one first locking assembly; and at least one measuring needle, the measuring needle having a contact end, the contact end being used to abut against a measuring position of a workpiece; the measuring needle comprising a second locking assembly, the second locking assembly being used to detachably cooperate with the first locking assembly so that the measuring needle can be detachably arranged on the main body; The first locking assembly includes a lock head, one end of which has a locking portion, and the locking portion includes a connecting section and a locking protrusion provided on a side of the connecting section; The second locking assembly includes a lock buckle mounting seat and a lock buckle, the lock buckle is movably arranged on the lock buckle mounting seat; the lock buckle mounting seat is provided with a first channel; the lock buckle is provided with a locking cavity, the locking cavity is used to accommodate the locking part, the locking cavity has an opening, the opening includes an avoidance portion allowing the locking part to insert into or leave the locking cavity and a shrinkage portion capable of limiting the locking protrusion, and the lock buckle movably switches the avoidance portion or the shrinkage portion to be opposite to the first channel.

2. The target according to claim 1, characterized in that The size of the avoidance portion is not less than the outer contour size of the locking portion, so that the locking portion can enter the locking cavity through the avoidance portion; the width of the necked portion is less than the width of the locking portion along the protruding direction of the locking protrusion, and is not less than the width of the connecting section along the protruding direction of the locking protrusion, so that the locking portion can enter the necked portion from the avoidance portion and be locked in the locking cavity corresponding to the necked portion.

3. The target according to claim 1, characterized in that The first locking assembly also includes a lock head mounting seat and an elastic member, wherein the lock head mounting seat is mounted on the main body, the lock head is flexibly connected to the lock head mounting seat through the elastic member, and the elastic member applies an elastic force to the lock head axially away from the lock buckle along the first channel.

4. The target according to claim 3, characterized in that The lock also includes a locking rod and a positioning member, the locking rod is connected between the positioning member and the connecting section; the lock mounting seat has a locking through hole for the locking rod to movably pass through, and the lock mounting seat is provided with a limiting member for limiting the axial range of movement of the positioning member along the locking through hole; the elastic member is arranged between the positioning member and the lock mounting seat, and the elastic member is used to apply an elastic force to the positioning member to move in a direction away from the lock mounting seat.

5. The target according to claim 3, characterized in that The lock buckle mounting seat is provided with a second channel, the second channel and the first channel are arranged to intersect and communicate with each other, the lock buckle is rotatably arranged in the second channel, the lock buckle can rotate around the circumference of the second channel, the avoidance portion and the shrinkage portion are arranged around the circumference of the lock buckle, and the rotation of the lock buckle can switch the avoidance portion or the shrinkage portion to be opposite to the first channel.

6. The target according to claim 5, characterized in that The locking protrusion has a locking arc surface on one side close to the connecting section. When the lock buckle is at a position relative to the necked portion and the first channel, the locking arc surface is pressed tightly against the edge of the necked portion under the elastic force of the elastic member.

7. The target according to claim 6, characterized in that When the lock buckle is in a position relative to the avoidance opening portion and the first channel, the vertex of the locking arc surface close to the connecting section is flush with the edge of the avoidance opening portion or closer to the first channel than the edge of the avoidance opening portion, and the center of the locking arc surface is closer to the first channel than the axis of the cavity wall of the locking cavity.

8. The target according to claim 5, characterized in that The lock buckle and the lock buckle mounting seat are cooperatively provided with a rotation limiting structure, and the rotation limiting structure is used to limit the rotation range of the lock buckle.

9. The target according to any one of claims 1 to 8, characterized in that One of the lock mounting seat and the lock buckle mounting seat is provided with a first power connector, and the other is provided with a second power connector. The main body can supply power to the first power connector or the second power connector installed on the lock mounting seat. When the measuring probe is installed on the main body, the first power connector and the second power connector are electrically connected so that the main body can identify the measuring probe.

10. Laser tracking measurement system, characterized in that, A target of the laser tracking and measuring system comprising a laser tracker and any one of claims 1-9.

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