Disclosure of Invention
In order to solve the problem that limiting and fixing of parts with different sizes are inconvenient in the background technology, the invention provides an adjustable tool for automatic nondestructive testing.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an adjustable frock for automatic nondestructive test, includes the main part, the inside rotation on main part top is connected with the rolling disc, the quantity of rolling disc is two, two the top fixed mounting of rolling disc has a fixed splint, the standing groove has been seted up to the bottom of fixed splint;
The clamping mechanism is arranged at the top end of the rotating disc and comprises a fixing hole, the fixing hole is formed in the top end of the rotating disc, a sliding rod is fixedly arranged in the fixing hole, the surface of the sliding rod is connected with a first sliding block in a sliding mode, a second spring positioned on the surface of the sliding rod is fixedly arranged on one opposite side of the first sliding block, the other end of the second spring is fixedly connected with the inner wall of the fixing hole, a movable clamping plate is fixedly arranged at the top end of the first sliding block, a first spring is fixedly arranged in the movable clamping plate, a contact plate is fixedly arranged on one opposite side of the first spring, and a connecting block is fixedly arranged at the bottom end of the movable clamping plate;
The driving mechanism is arranged at the top end of the inside of the rotating disc and comprises a fixed ring, the fixed ring is fixedly connected to the top end of the inside of the rotating disc, the inside of the rotating disc is rotationally connected with a first toothed ring, the top end of the first toothed ring is fixedly provided with a second toothed ring, the bottom end of the first toothed ring is fixedly provided with a connecting plate, the bottom end of the fixed ring is rotationally connected with a toothed plate I meshed with the first toothed ring, the top end of the fixed ring is rotationally connected with a toothed plate II meshed with the second toothed ring, screw rods are fixedly arranged at the top ends of the first toothed plate and the second toothed plate, screw blocks are in threaded connection with the top ends of the screw rods, the top ends of the screw blocks are fixedly provided with a first extrusion block, the top end of the inside of the rotating disc is fixedly provided with a first motor, and the output end of the first motor is fixedly connected with the top end of the connecting plate.
Preferably, the method further comprises the following steps: the rotating mechanism is arranged at the bottom end of the rotating disc and comprises connecting columns, the connecting columns are fixedly connected to the bottom end of the rotating disc, the number of the connecting columns is two, driving wheels I are fixedly arranged at the bottom ends of the two connecting columns, a motor II is fixedly arranged at the bottom end inside the main body, a driving wheel II is fixedly arranged at the output end of the motor II, and a synchronous belt is connected with the surface transmission of the driving wheel I and the driving wheel II.
Preferably, the method further comprises the following steps: the positioning mechanism is arranged at the bottom end of the inside of the rotating disc and comprises a mounting plate, the mounting plate is fixedly connected to the bottom end of the inside of the rotating disc, a cross rod is fixedly arranged on one side, opposite to the mounting plate, of the mounting plate, a second sliding block is fixedly connected to the surface of the cross rod, a fourth spring positioned on the surface of the cross rod is fixedly arranged on one side, opposite to the mounting plate, of the second sliding block, a positioning plate positioned at the top end of the rotating disc is fixedly arranged on the top end of the second sliding block, a first hinging rod and a second hinging rod are hinged to the inside of the second sliding block, the other ends of the first hinging rod and the second hinging rod are hinged to each other, an arc plate is fixedly arranged at the top end of the rotating disc, and a second extrusion block is fixedly arranged at the rear end of the arc plate.
Preferably, the inside fixed mounting of fixed orifices has the square board that is located two bottoms of spring, the bottom fixed mounting of square board has the gag lever post that is located the inside of extrusion piece, extrusion piece one can slide in the inside of gag lever post, and extrusion piece one's surface is smooth design.
Preferably, the constant head tank has been seted up on the surface of spliced pole, the surface of spliced pole is provided with the fixed shell that is located the main part rear end, the fixed slot has been seted up to the inside of fixed shell, the inside fixed mounting of fixed slot has the spring III, the rear end fixed mounting of spring III has the locating piece that is located the constant head tank inside.
Preferably, a supporting groove is formed in the top end of the main body, and a supporting ring positioned on the surface of the rotating disc is connected in a rotating mode in the supporting groove.
Preferably, the bottom fixed mounting of main part has the supporting shell, the bottom fixed mounting of supporting shell has the gyro wheel, the left end of main part and supporting shell has the holding rod.
Preferably, a rubber pad is arranged on one side of the fixed clamping plate close to the contact plate, and each two springs are arranged in the movable clamping plate in a group, and are designed transversely and symmetrically with respect to the center of the movable clamping plate.
Preferably, square holes are formed in the surface of the rotating disc, and the first hinge rod and the second hinge rod can move in the square holes.
The use method of the adjustable tool for automatic nondestructive testing comprises the following steps:
S1: an operator can put the parts into the placing groove, then the motor II can be driven to drive the driving wheel II to drive the connecting column to rotate, then the connecting column can drive the rotating disc and the fixed clamping plate to rotate, after the rotating disc and the fixed clamping plate rotate forty-five degrees, the fixed clamping plate and the placing groove without the parts can move to the front of the operator, and then the operator can put the parts into the corresponding placing groove according to the sizes of the parts;
S2: the first hinge rod and the second hinge rod rotate along with the rotating disc, the hinge part of the first hinge rod and the hinge part of the second hinge rod are contacted with the second extrusion block, the positioning plate moves in opposite directions, and then when the part is placed in the placing groove, and the first hinge rod and the second hinge rod are far away from the surface of the second extrusion block, the compressed spring IV pushes the positioning plate to move relatively, so that the part is positioned;
S3: after all parts are placed in the placing groove, the motor I can be driven to enable the toothed ring I and the toothed ring II, then the toothed ring I and the toothed ring II can drive the toothed plate I and the toothed plate II to rotate, and as the toothed plate I and the toothed plate II can generate speed difference, the clamping mechanism can clamp and fix the parts with different sizes;
S4: after the clamping and fixing are completed, the roller can be pushed to drive the tool to move, and then the tool is moved to a detection room for detection.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, the first toothed ring and the second toothed ring are driven to rotate by the driving motor, then the first toothed ring and the second toothed ring drive the first toothed plate and the second toothed plate to rotate, and as the first toothed plate and the second toothed plate are different in size, a speed difference is generated during rotation, then the first toothed plate and the second toothed plate drive the screw rod to rotate, then the screw rod drives the threaded block and the first extrusion block to move upwards, then the extrusion block extrudes the connecting block and the first sliding block for a while, then the sliding block drives the movable clamping plate, the first spring and the contact plate to move for a while, then the surface of the contact plate is contacted with the surface of a part, and finally the clamping mechanism can adjust the clamping distance and the clamping force according to the speed difference generated by rotation of the first toothed plate and the second toothed plate so as to adapt to the parts with different sizes and shapes; the detection efficiency is improved, the operation difficulty and the cost are reduced, and the fixing effect on the parts can be further improved through compression of the first spring;
according to the invention, the driving motor II is used for driving the driving wheel II to rotate, then the driving wheel II can drive the driving wheel I and the synchronous belt to rotate, then the driving wheel II can drive the connecting column and the rotating disc to rotate for a while, then the rotating disc is enabled to rotate for forty-five degrees, the fixed clamping plate and the placing groove which are not provided with parts can move to the front of an operator, then the operator can place the parts into the placing groove, finally the rotating disc is driven to rotate for forty-five degrees, and then the operator can place the parts into different placing grooves without walking, so that the convenience of the device is improved;
According to the invention, the first hinge rod and the second hinge rod rotate along with the rotation of the rotating disc, then the hinge joint of the first hinge rod and the second hinge rod is contacted with the surface of the extrusion block II, then the first hinge rod and the second hinge rod are extruded to rotate, then the first hinge rod and the second hinge rod push the second slide block and the positioning plate to move in opposite directions, then the second slide block can extrude the fourth spring, and then when the first hinge rod and the second hinge rod are far away from the surface of the extrusion block II, the compressed fourth spring pushes the positioning plate and the second slide block to reset, so that the parts are positioned, the parts are prevented from being separated from the inside of the positioning groove when the rotating disc rotates, and the stability of the parts in the rotation process is ensured.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 10, the invention provides an adjustable tool for automatic nondestructive testing, which comprises a main body 1, wherein the inside of the top end of the main body 1 is rotationally connected with rotating discs 2, the number of the rotating discs 2 is two, the top ends of the two rotating discs 2 are fixedly provided with fixed clamping plates 3, and the bottom ends of the fixed clamping plates 3 are provided with placing grooves 4;
The clamping mechanism is arranged at the top end of the rotating disc 2 and comprises a fixing hole 5, the fixing hole 5 is formed in the top end of the rotating disc 2, a sliding rod 6 is fixedly arranged in the fixing hole 5, the surface of the sliding rod 6 is connected with a first sliding block 7 in a sliding mode, a second spring 20 positioned on the surface of the sliding rod 6 is fixedly arranged on one side, opposite to the first sliding block 7, the other end of the second spring 20 is fixedly connected with the inner wall of the fixing hole 5, a movable clamping plate 8 is fixedly arranged at the top end of the first sliding block 7, a first spring 9 is fixedly arranged in the movable clamping plate 8, a contact plate 10 is fixedly arranged on one side, opposite to the first spring 9, of the first spring, and a connecting block 21 is fixedly arranged at the bottom end of the movable clamping plate 8;
The driving mechanism is arranged at the top end inside the rotating disc 2 and comprises a fixed ring 11, the fixed ring 11 is fixedly connected to the top end inside the rotating disc 2, a toothed ring I12 is rotatably connected to the inside of the rotating disc 2, a toothed ring II 13 is fixedly arranged at the top end of the toothed ring I12, a connecting plate 14 is fixedly arranged at the bottom end of the toothed ring I12, a toothed plate I15 meshed with the toothed ring I12 is rotatably connected to the bottom end of the fixed ring 11, a toothed plate II 16 meshed with the toothed ring II 13 is rotatably connected to the top end of the fixed ring 11, screw rods 17 are fixedly arranged at the top ends of the toothed plate I15 and the toothed plate II 16, screw blocks 18 are in threaded connection with the top ends of the screw rods 17, an extrusion block I19 is fixedly arranged at the top end of the screw blocks 18, a motor I22 is fixedly arranged at the top end inside the rotating disc 2, and the output end of the motor I22 is fixedly connected with the top end of the connecting plate 14.
The scheme is adopted: after the parts with different sizes are respectively placed into the corresponding placing grooves 4 by operators, the first motor 22 can be driven, then the output end of the first motor 22 drives the connecting plate 14 to rotate, then the connecting plate 14 drives the first toothed ring 12 and the second toothed ring 13 to rotate, the first toothed ring 12 and the second toothed ring 13 are meshed with the first toothed plate 15 and the second toothed plate 16, the first toothed ring 12 and the second toothed ring 13 drive the first toothed plate 15 and the second toothed plate 16 to rotate, and due to the fact that the sizes of the first toothed plate 15 and the second toothed plate 16 are different, speed difference exists when the first toothed plate 15 and the second toothed plate 16 rotate, the speed difference drives the screw rod 17 to rotate, the screw rod 17 is in threaded connection with the threaded block 18, then when the screw rod 17 rotates, the threaded block 18 moves on the surface of the screw rod 17, then the threaded block 18 drives the first extrusion block 19 to move upwards, then the surface of the first extrusion block 19 is contacted with the bottom end of the connecting block 21, and the top end of the extrusion block 19 is in parallel with the bottom end of the extrusion block 21, and then the extrusion block 21 moves to the connecting block 21, and then the sliding block 21 is moved to the surface of the extrusion block 21 is reduced, and the sliding block 21 is moved to the connecting block 8;
when the first slide block 7 moves, the second spring 20 is stretched, the moving clamping plate 8 drives the first spring 9 and the contact plate 10 to move towards the surface of the part, then the surface of the contact plate 10 is contacted with the surface of the part, the first spring 9 is compressed while contacting, then the contact plate 10 can clamp and fix the part, finally, the clamping distance and force can be adjusted by the clamping mechanism through the speed difference generated by the rotation of the first toothed plate 15 and the second toothed plate 16, so as to adapt to the parts with different sizes and shapes; this not only improves the detection efficiency, but also reduces the operation difficulty and cost, and by compression of the first spring 9, the fixing effect on the parts can be increased.
As shown in fig. 3 and 4, the method further comprises: the rotating mechanism is arranged at the bottom end of the rotating disc 2 and comprises two connecting columns 27, the connecting columns 27 are fixedly connected to the bottom end of the rotating disc 2, driving wheels I28 are fixedly arranged at the bottom ends of the two connecting columns 27, a motor II 30 is fixedly arranged at the bottom end inside the main body 1, a driving wheel II 31 is fixedly arranged at the output end of the motor II 30, and a synchronous belt 29 is connected with the surfaces of the driving wheels I28 and II 31 in a driving manner.
The scheme is adopted: through the design of a rotating mechanism, an operator can drive a motor II 30 to rotate a driving wheel II 31 after placing a part in the front of the inside of a placing groove 4 through a controller, as the surfaces of the driving wheel II 31 and a driving wheel I28 are rotationally connected with a synchronous belt 29, the driving wheel II 31 can drive the synchronous belt 29 to rotate, the synchronous belt 29 can drive the two driving wheels I28 to rotate, then the driving wheel I28 can drive a connecting column 27 and two rotating discs 2 to rotate, then the rotating discs 2 of the rotating part can rotate, then the rotating discs 2 can rotate for forty-five degrees, after the rotating for forty-five degrees, the controller can cancel the power supply to the motor II 30, then the rotating discs 2 can stop rotating, then the fixed clamping plate 3 without the part and the placing groove 4 can rotate to the front of the operator, then the part can be placed in the inside of the placing groove 4, after the part is placed in the inside of the placing groove 4, the operator can continuously drive the motor II 30 to rotate the rotating discs 2 through the controller, so that the part is placed in the inside of all the placing grooves 4, finally, the rotating discs 2 can be driven for forty-five degrees, and then the operator can be placed in the place into the inside of the placing groove 4 without moving device.
As shown in fig. 2 and 5, the method further comprises: the positioning mechanism is arranged at the bottom end inside the rotating disc 2 and comprises a mounting plate 37, the mounting plate 37 is fixedly connected to the bottom end inside the rotating disc 2, a cross rod 38 is fixedly arranged on one side, opposite to the mounting plate 37, of the cross rod 38, a second sliding block 39 is fixedly connected to the surface of the cross rod 38, a fourth spring 40 positioned on the surface of the cross rod 38 is fixedly arranged on one side, opposite to the mounting plate 37, of the second sliding block 39, a positioning plate 43 positioned at the top end of the rotating disc 2 is fixedly arranged at the top end of the second sliding block 39, a first hinging rod 41 and a second hinging rod 42 are hinged inside the second sliding block 39, the other ends of the first hinging rod 41 and the second hinging rod 42 are mutually hinged, an arc-shaped plate 44 is fixedly arranged at the top end of the rotating disc 2, and a second extrusion block 45 is fixedly arranged at the rear end of the arc-shaped plate 44.
The scheme is adopted: through the design of the positioning mechanism, when the connecting column 27 drives the rotating disc 2 to rotate, the rotating disc 2 drives the first hinge rod 41 and the second hinge rod 42 to rotate, when the rotating disc 2 rotates forty-five degrees, the hinge joint of the first hinge rod 41 and the second hinge rod 42 is contacted with the surface of the second extrusion block 45, as the two sides of the second extrusion block 45 are designed into inclined planes, the first hinge rod 41 and the second hinge rod 42 are extruded by the second extrusion block 45, then the first hinge rod 41 and the second hinge rod 42 rotate, then the first hinge rod 41 and the second hinge rod 42 push the two sliding blocks 39 to move oppositely, the second sliding blocks 39 drive the positioning plate 43 to move oppositely, and when the second sliding blocks 39 move oppositely, the fourth sliding blocks 39 extrude the fourth spring 40, and then when the fixed clamping plate 3 and the placing groove 4 rotate to the front of an operator, parts can be placed in the placing groove 4;
The rotating disc 2 can be driven to rotate again, and when the first hinging rod 41 and the second hinging rod 42 are far away from the surface of the second extrusion block 45, the compressed spring IV 40 can push the second sliding block 39 and the locating plate 43 to move relatively, and as one side of the locating plate 43 contacts with one side of the fixed clamping plate 3, the opposite side of the locating plate 43 contacts with two sides of a part, the part can be located, the part is prevented from being separated from the inside of the placing groove 4 when the rotating disc 2 rotates, and the stability of the part in the rotating process is further ensured.
As shown in fig. 9, a square plate 23 positioned at the bottom end of the second spring 20 is fixedly installed in the fixing hole 5, a limiting rod 24 positioned in the first extrusion block 19 is fixedly installed at the bottom end of the square plate 23, the first extrusion block 19 can slide in the limiting rod 24, and the surface of the first extrusion block 19 is of a smooth design.
The scheme is adopted: through square plate 23 and gag lever post 24's design, when lead screw 17 rotates, gag lever post 24 can carry out spacingly to extrusion piece one 19, through the spacing to extrusion piece one 19, and then ensures that lead screw 17 can drive screw thread piece 18 and extrusion piece one 19 and remove.
As shown in fig. 4, a positioning groove 33 is formed in the surface of the connecting column 27, a fixing shell 32 located at the rear end of the main body 1 is arranged on the surface of the connecting column 27, a fixing groove 34 is formed in the fixing shell 32, a third spring 35 is fixedly mounted in the fixing groove 34, and a positioning block 36 located in the positioning groove 33 is fixedly mounted at the rear end of the third spring 35.
The scheme is adopted: by the design of the third spring 35 and the positioning block 36, when the connecting column 27 rotates, the positioning block 36 is far away from the inside of the positioning groove 33, while the positioning block 36 of the mounting plate 37 is far away from the inside of the positioning groove 33, the third spring 35 is extruded, when the connecting column 27 rotates forty-five degrees, the positioning block 36 and the positioning groove 33 are overlapped again, and then the third compressed spring 35 pushes the positioning block 36 into the inside of the positioning groove 33 again, so that positioning is completed.
As shown in fig. 1 and 10, a supporting groove 25 is formed in the top end of the main body 1, a supporting ring 26 located on the surface of the rotating disc 2 is rotatably connected in the supporting groove 25, a supporting shell 46 is fixedly installed at the bottom end of the main body 1, a roller 47 is fixedly installed at the bottom end of the supporting shell 46, and a holding rod 48 is fixedly installed at the left ends of the main body 1 and the supporting shell 46.
The scheme is adopted: through the design of supporting slot 25 and supporting ring 26, when rotating disk 2 rotates, supporting ring 26 can rotate in the inside of supporting slot 25, owing to the inner wall of supporting slot 25 is laminated on the surface of supporting ring 26, and then can support and spacing rotating disk 2, ensure that rotating disk 2 can stably rotate, through the design of gyro wheel 47 and holding rod 48, after the part is fixed, the surface of holding rod 48 can be held to the operating personnel, then promote gyro wheel 47 rotation, then pivoted gyro wheel 47 can drive whole device and remove, thereby can make the frock remove the detection room and detect.
As shown in fig. 3 and 9, a rubber pad is disposed on one side of the fixed clamping plate 3 close to the contact plate 10, each two springs 9 are disposed in the movable clamping plate 8, and are designed to be transversely symmetrical about the center of the movable clamping plate 8, square holes are formed in the surface of the rotating disc 2, and the hinge rod one 41 and the hinge rod two 42 can move in the square holes.
The scheme is adopted: through the design of fixed splint 3 and spring one 9, owing to be provided with the rubber pad on one side of fixed splint 3, and then can increase the frictional force with between the part, and then can improve the centre gripping effect to the part, then can protect the part, and spring one 9 is two, and then when contact plate 10 and part contact, can make contact plate 10 parallel movement, avoid appearing the phenomenon of buckling, and then make contact plate 10 abundant with the surface contact of part, and then improved fixed effect, through the design of rolling disc 2, when hinge rod one 41 and hinge rod two 42 rotate, hinge rod one 41 and hinge rod two 42 can remove in square hole, owing to square hole size and hinge rod one 41's size looks adaptation, and then can support hinge rod one 41, and the moving of hinge rod two 42 can not be interfered to rolling disc 2.
As shown in fig. 1 to 10, the method of use is as follows:
S1: an operator can put the parts into the placing groove, then the motor II can be driven to drive the driving wheel II to drive the connecting column to rotate, then the connecting column can drive the rotating disc and the fixed clamping plate to rotate, after the rotating disc and the fixed clamping plate rotate forty-five degrees, the fixed clamping plate and the placing groove without the parts can move to the front of the operator, and then the operator can put the parts into the corresponding placing groove according to the sizes of the parts;
S2: the first hinge rod and the second hinge rod rotate along with the rotating disc, the hinge part of the first hinge rod and the hinge part of the second hinge rod are contacted with the second extrusion block, the positioning plate moves in opposite directions, and then when the part is placed in the placing groove, and the first hinge rod and the second hinge rod are far away from the surface of the second extrusion block, the compressed spring IV pushes the positioning plate to move relatively, so that the part is positioned;
S3: after all parts are placed in the placing groove, the motor I can be driven to enable the toothed ring I and the toothed ring II, then the toothed ring I and the toothed ring II can drive the toothed plate I and the toothed plate II to rotate, and as the toothed plate I and the toothed plate II can generate speed difference, the clamping mechanism can clamp and fix the parts with different sizes;
S4: after the clamping and fixing are completed, the roller can be pushed to drive the tool to move, and then the tool is moved to a detection room for detection.
The working principle and the using flow of the invention are as follows:
Firstly, an operator can put parts into the placing groove 4, then a motor II 30 can be driven to enable a driving wheel II 31 to rotate, then the driving wheel II 31 can drive a driving wheel I28 and a synchronous belt 29 to rotate, then the driving wheel I28 can drive a connecting column 27 and a rotating disc 2 to rotate, then the rotating disc 2 rotates forty-five degrees, a fixed clamping plate 3 without parts and the placing groove 4 can move to the front of the operator, and then the operator can put the parts into the placing groove 4; the rotating disc 2 can be driven to rotate continuously, so that corresponding parts can be placed into the corresponding placing grooves 4 in sequence;
While the rotating disc 2 rotates, the hinge rod I41 and the hinge rod II 42 rotate, then the hinge joint of the hinge rod I41 and the hinge rod II 42 is contacted with the surface of the extrusion block II 45, then the hinge rod I41 and the hinge rod II 42 are extruded and rotated, then the hinge rod I41 and the hinge rod II 42 push the slide block II 39 and the positioning plate 43 to move oppositely, then the slide block II 39 extrudes the spring IV 40, and then when the part is placed in the placing groove 4, and the hinge rod I41 and the hinge rod II 42 are far away from the surface of the extrusion block II 45, the compressed spring IV pushes the positioning plate 43 and the slide block II 39 to reset, so that the part is positioned;
After all the parts are placed in the placing groove 4, the first motor 22 can be driven to rotate the first toothed ring 12 and the second toothed ring 13, then the first toothed ring 12 and the second toothed ring 13 can drive the first toothed plate 15 and the second toothed plate 16 to rotate, the first toothed plate 15 and the second toothed plate 16 are different in size, further, when the toothed plates rotate, speed difference is generated, then the first toothed plate 15 and the second toothed plate 16 can drive the screw rod 17 to rotate, then the screw rod 17 can drive the threaded block 18 and the first extrusion block 19 to move upwards, then the first extrusion block 19 can extrude the connecting block 21 and the first slider 7 to move, then the first slider 7 can drive the movable clamping plate 8, the first spring 9 and the contact plate 10 to move, then the surface of the contact plate 10 can be contacted with the surface of the parts, and the cooperation between the contact plate 10 and the placing groove 4 is adopted, so that the parts with different sizes are fixed, and after the fixing is completed, a tool can be pushed to move to a detection room for detection.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.