Grabbing device for grinding screw rod

Abstract

The utility model relates to the technical field of screw machining, and discloses a grabbing device for screw polishing. The gripping device comprises a fixing seat, a clamp, a first driving mechanism, a second driving mechanism and a controller, the clamp, the first driving mechanism and the second driving mechanism are arranged on the fixing seat, the clamp comprises a first chuck and a second chuck, the first chuck is connected with the first driving mechanism, and the second chuck is connected with the second driving mechanism. According to the grabbing device, the fixing base is connected to the mechanical arm, when the second driving mechanism drives the second clamping head to move towards the first clamping head, the second clamping head and the first clamping head are inserted into the clamping hole of the screw rod, and the screw rod is clamped and grabbed; and then, the first driving mechanism drives the first clamping head to rotate, the first clamping head drives the clamped screw to rotate, the mechanical arm drives the screw to move, the grabbed screw can be ground, integrated automatic grinding and polishing of the screw are achieved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screw rod processing, in particular to a grabbing device used for screw rod grinding. Background Art

[0002] The steering screw (lead screw) of the automobile steering system includes a smooth circle segment and a threaded segment, and a plane is provided on the circumferential side wall of the middle section of the smooth circle segment, and a linear rack is formed on the plane of the smooth circle segment. The steering screw for automobiles has very high requirements on the processing accuracy and finish of the screw tooth groove (thread) and the circumferential outer wall (tooth back) of the smooth circle segment.

[0003] The steering screw for automobiles is usually processed by rolling the bar into shape through a rolling machine, and then the tooth grooves and tooth backs of the screw are polished by polishing equipment to achieve the required processing accuracy and smoothness of the steering screw.

[0004] The inventor of the present application has found that the current polishing of the steering screw requires multiple devices and multiple processes, and the processing efficiency is low. Therefore, it is necessary to develop intelligent processing equipment for the steering screw, and realize the integrated automatic polishing of the steering screw by grabbing the screw with a manipulator. The screw needs to be rotated during grinding to grind the tooth groove (thread), so how to make the manipulator grab the screw and realize the rotation of the screw is a technical problem that needs to be solved urgently by technicians in the industry. Utility Model Content

[0005] The purpose of the utility model is to provide a gripping device for screw grinding to solve the problems in the above-mentioned background technology.

[0006] The embodiment of the utility model provides a gripping device for grinding a screw rod, wherein both ends of the screw rod are provided with clamping holes, and the gripping device comprises: a fixing seat, a clamp, a first driving mechanism, a second driving mechanism and a controller;

[0007] The fixing seat is used to connect with the manipulator;

[0008] The clamp, the first driving mechanism and the second driving mechanism are arranged on the fixing seat;

[0009] The clamp comprises: a first clamp and a second clamp;

[0010] The first chuck and the second chuck are both cylindrical, with conical sections at the ends;

[0011] The first chuck is rotatably disposed on the fixed seat and connected to the first driving mechanism, and the first driving mechanism is used to drive the first chuck to rotate;

[0012] The second chuck is slidably disposed on the fixing seat and connected to the second driving mechanism. The second driving mechanism is used to drive the second chuck to slide so as to approach and move away from the first chuck. When the second chuck approaches the first chuck, the first chuck and the second chuck are inserted into the clamping hole to clamp the screw, and the first chuck drives the screw to rotate when rotating.

[0013] The first driving mechanism and the second driving mechanism are electrically connected to the controller respectively.

[0014] Based on the above scheme, it can be known that the gripping device for screw grinding of the utility model is provided with a fixed seat, a clamp, a first driving mechanism, a second driving mechanism and a controller. The clamp, the first driving mechanism and the second driving mechanism are provided on the fixed seat. The clamp includes: a first chuck and a second chuck. The first chuck is provided on the fixed seat and connected to the first driving mechanism. The second chuck is provided on the fixed seat and connected to the second driving mechanism. The gripping device for screw grinding of the utility model has a fixed seat connected and fixed to a manipulator. The manipulator drives the gripping device to move. When the second driving mechanism drives the second chuck to move toward the first chuck, the second chuck and the first chuck are inserted into the clamping hole of the screw from both ends of the screw to clamp and grip the screw; then, the first driving mechanism drives the first chuck to rotate. When the first chuck rotates, it drives the clamped screw to rotate together. Then, the gripped screw can be polished and polished, realizing the integrated automatic polishing of the screw and improving the processing efficiency.

[0015] In a feasible solution, the second driving mechanism includes: an electric cylinder and a fixed block;

[0016] The fixing block is arranged on the slide table of the electric cylinder, and the second clamp is arranged on the fixing block.

[0017] In a feasible solution, the first driving mechanism includes: a servo motor, a driving wheel, a driven wheel and a synchronous belt;

[0018] The servo motor is arranged on the fixing seat and is electrically connected to the controller;

[0019] The first chuck is arranged on the fixing seat through a bearing seat;

[0020] The driving wheel and the driven wheel are respectively arranged on the output shaft of the servo motor and the first clamping head, and are connected through the synchronous belt transmission.

[0021] In a feasible solution, it also includes: a supporting roller;

[0022] The supporting roller is rotatably arranged on the fixing seat via a rotating shaft, and is used for abutting against the screw rod.

[0023] In a feasible solution, it also includes: a support frame;

[0024] The support frame comprises: a first support plate, a second support plate, a spring, a connecting bolt and a fixing nut;

[0025] The first support plate is arranged on the fixing seat, the second support plate is connected to the first support plate through the connecting bolt and the fixing nut, the spring is sleeved on the connecting bolt, and two ends of the spring are respectively against the first support plate and the second support plate;

[0026] The rotating shaft is arranged on the second supporting plate.

[0027] In a feasible solution, the fixing seat is provided with a bolt groove;

[0028] The connecting bolt is slidably arranged in the bolt groove.

[0029] In a feasible solution, it also includes: an encoder;

[0030] The encoder is arranged on the rotating shaft and is electrically connected to the controller for detecting the rotation speed of the screw.

[0031] In a feasible solution, it also includes: a proximity sensor;

[0032] The proximity sensor is arranged on the fixing seat and is electrically connected to the controller, and is used for sending a position signal to the controller when sensing that the fixing block reaches a preset position.

[0033] In a feasible solution, the fixing seat is provided with a connecting flange, and the connecting flange is used to be connected to the manipulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 It is a three-dimensional schematic diagram of a gripping device for grinding a screw rod in an embodiment of the utility model;

[0036] Figure 2 In the embodiment of the utility model Figure 1 A partial enlarged view of the

[0037] Figure 3 In the embodiment of the utility model Figure 1 Another partial enlarged view in;

[0038] Figure 4 It is a front view schematic diagram of the grabbing device in the embodiment of the utility model;

[0039] Figure 5 It is a schematic diagram of the first clamp in the embodiment of the utility model.

[0040] Numbers in the figure:

[0041] 1. Fixed seat; 11. Bolt slot; 12. Connecting flange; 21. First chuck; 22. Second chuck; 31. Servo motor; 32. Protective cover; 4. Second driving mechanism; 41. Electric cylinder; 411. Slide; 42. Fixed block; 5. Support roller; 51. Rotating shaft; 6. Support frame; 61. First support plate; 62. Second support plate; 63. Spring; 64. Fixing nut; 7. Encoder; 8. Proximity sensor; 10. Screw. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0046] As described in the background technology of this application, during processing, steering screws for automobiles are generally formed by rolling rods through a rolling machine, and then the tooth grooves and tooth backs of the screws are ground and polished by polishing equipment to achieve the required processing accuracy and smoothness of the steering screws.

[0047] The inventor of the present application has found that the current polishing of steering screws requires multiple devices and multiple processes, and the processing efficiency is low. Therefore, it is necessary to develop intelligent processing equipment for steering screws, and realize integrated automatic polishing of steering screws by grabbing the screws with a manipulator. The screws need to be rotated during grinding to grind the tooth grooves (threads). Therefore, how to make the manipulator grab the screws and realize the rotation of the screws is a technical problem that needs to be solved urgently by technicians in the industry.

[0048] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0049] Figure 1 It is a three-dimensional schematic diagram of a gripping device for screw grinding in an embodiment of the utility model. Figure 2 In the embodiment of the utility model Figure 1 A partial enlarged view of Figure 3 In the embodiment of the utility model Figure 1 Another enlarged view of the part, Figure 4 It is a front view schematic diagram of the grabbing device in the embodiment of the utility model, Figure 5 It is a schematic diagram of the first clamp in the embodiment of the utility model.

[0050] like Figures 1 to 5 As shown, the gripping device for screw grinding of this embodiment includes: a fixing seat 1, a clamp, a first driving mechanism, a second driving mechanism 4 and a controller.

[0051] The end faces of the left and right ends of the screw rod 10 are both provided with clamping holes, and the bottom ends of the clamping holes are conical.

[0052] The clamp, the first driving mechanism and the second driving mechanism 4 are respectively arranged on the fixed seat 1, and one side of the fixed seat 1 is connected to the rotating arm of the manipulator, so that the grasping device is fixed on the rotating arm of the manipulator, and the manipulator drives the entire grasping device to move.

[0053] The clamp includes a first clamp 21 and a second clamp 22 .

[0054] The first chuck 21 and the second chuck 22 of the clamp are both stepped cylindrical, and the ends of the first chuck 21 and the second chuck 22 are provided with tapered sections. The first chuck 21 and the second chuck 22 are adapted to the clamping holes of the screw 10 .

[0055] The first driving mechanism is disposed on the fixed seat 1, and is located at one end (left end) of the fixed seat 1. The first clamp 21 of the clamp is rotatably disposed on the fixed seat 1, and the first clamp 21 is transmission-connected to the first driving mechanism, and the first driving mechanism is used to drive the first clamp 21 to rotate.

[0056] The second driving mechanism 4 is arranged on the fixed seat 1, and is located at the other end (right end) of the fixed seat 1. The second chuck 22 is slidably arranged on the fixed seat 1, and is connected to the second driving mechanism 4. The second driving mechanism 4 is used to drive the second chuck 22 to slide left and right on the fixed seat 1, so that the second chuck 22 approaches and / or moves away from the first chuck 21. When the second chuck 22 approaches the first chuck 21, the second chuck 22 and the first chuck 21 of the clamp extend into the clamping hole of the screw 10 from both sides, and the second chuck 22 cooperates with the first chuck 21 to clamp and grasp the screw 10, and when the first driving mechanism drives the first chuck 21 to rotate, the first chuck 21 drives the grasped and clamped screw 10 to rotate together, so as to grind and polish the screw 10; when the second chuck 22 moves away from the first chuck 21, the clamp releases the grasped screw 10.

[0057] The first driving mechanism and the second driving mechanism are electrically connected to the controller respectively, and the controller controls the first driving mechanism and the second driving mechanism to perform corresponding preset actions according to a preset program.

[0058] In this embodiment, the fixed seat is connected to the rotating arm of the manipulator, and the manipulator drives the entire grasping device to move. The second chuck of the clamp is slidably arranged on the fixed seat and connected to the second driving mechanism. When grasping the screw rod, the second driving mechanism drives the second chuck to move toward the first chuck, and the second chuck cooperates with the first chuck to clamp and grasp the screw rod from both ends of the screw rod; then, the first driving mechanism drives the first chuck to rotate, and the first chuck drives the clamped screw rod to rotate together when rotating, and the grinding mechanism can grind and polish the grasped screw rod.

[0059] It is not difficult to find from the above content that the gripping device for screw grinding of this embodiment is provided with a fixed seat, a clamp, a first driving mechanism, a second driving mechanism and a controller. The clamp, the first driving mechanism and the second driving mechanism are provided on the fixed seat. The clamp includes: a first chuck and a second chuck. The first chuck is provided on the fixed seat and connected to the first driving mechanism. The second chuck is provided on the fixed seat and connected to the second driving mechanism. The gripping device for screw grinding of this embodiment has a fixed seat connected and fixed to a manipulator. The manipulator drives the gripping device to move. When the second driving mechanism drives the second chuck to move toward the first chuck, the second chuck and the first chuck are inserted from both ends of the screw into the clamping hole of the screw to clamp and grip the screw; then, the first driving mechanism drives the first chuck to rotate. When the first chuck rotates, it drives the clamped screw to rotate together. Then, the gripped screw can be polished and polished, realizing the integrated automatic polishing of the screw and improving the processing efficiency.

[0060] Optionally, in the gripping device for screw grinding in this embodiment, the second driving mechanism 4 includes: an electric cylinder 41 and a fixing block 42 .

[0061] The electric cylinder 41 is disposed on the fixing base 1 and is electrically connected to the controller.

[0062] The fixing block 42 is arranged on the slide 411 of the electric cylinder 41 , and the second clamp 22 is arranged on the fixing block 42 through a bearing seat. The second clamp 22 moves left and right with the slide 411 of the electric cylinder 41 to clamp or release the screw.

[0063] Furthermore, in the gripping device for screw grinding in this embodiment, the first driving mechanism includes: a servo motor 31, a driving wheel, a driven wheel and a synchronous belt.

[0064] The servo motor 31 is disposed at the left end of the fixing base 1 and is electrically connected to the controller.

[0065] The driving wheel is arranged on the output shaft of the servo motor 31 .

[0066] The first chuck 21 is arranged on the fixed seat 1 through the bearing seat, the driven wheel is arranged on the first chuck 21, the driving wheel and the driven wheel are connected through a synchronous belt transmission, the servo motor 31 drives the first chuck 21 to rotate when it rotates, and the first chuck 21 drives the clamped screw 10 to rotate together when it rotates.

[0067] A protective cover 32 is provided on the fixing seat 1, and the protective cover 32 completely shields the synchronous belt, the driving wheel and the driven wheel to ensure the safe operation of the grabbing device.

[0068] Furthermore, the gripping device for screw grinding in this embodiment further includes: a supporting roller 5.

[0069] The support roller 5 is rotatably arranged on the fixed seat 1 through the rotating shaft 51, and is located between the first chuck 21 and the second chuck 22. When the first chuck 21 and the second chuck 22 grab and clamp the screw, the support roller 5 abuts against the circumferential side wall of the screw 10 to support the screw 10, thereby preventing the screw from bending and deforming during grinding and polishing, and ensuring the grinding accuracy of the screw.

[0070] Furthermore, the gripping device for screw grinding in this embodiment also includes: a support frame 6.

[0071] The support frame 6 includes: a first support plate 61, a second support plate 62, a spring 63, a fixing nut 64 and connecting bolts.

[0072] The first support plate 61 is arranged on the fixing seat 1, and the four vertices of the second support plate 62 are connected to the first support plate 61 by connecting bolts, and the fixing nuts 64 are engaged with the connecting bolts. The spring 63 is sleeved on the connecting bolts, and the spring 63 is in a compressed state, and the bottom end and the top end of the spring 63 are respectively against the first support plate 61 and the second support plate 62.

[0073] The rotating shaft 51 is disposed on the second supporting plate 62 , and the supporting roller 5 is rotatably disposed on the rotating shaft 51 .

[0074] In this embodiment, the support roller is elastically arranged on the fixed seat through the support frame, so that the support roller and the screw rod are kept in contact and fit, thereby providing better support for the screw rod.

[0075] Furthermore, in the gripping device for screw grinding in this embodiment, a bolt groove 11 is provided on the fixing seat 1.

[0076] The connecting bolts are slidably arranged in the bolt grooves 11 of the fixing seat 1, so that the support frame 6 and the supporting roller 5 are adjustable in position on the fixing seat 1 to adapt to the processing of screws with different length specifications.

[0077] Furthermore, the gripping device for screw grinding in this embodiment also includes: an encoder 7.

[0078] The encoder 7 is disposed on the rotating shaft 51 and is electrically connected to the controller for monitoring the rotation speed of the screw.

[0079] In this embodiment, the encoder is arranged on the rotating shaft to detect the rotation speed of the supporting roller and the screw, and sends the rotation speed information of the screw to the controller. When the rotation speed of the screw is lower than the set value due to the looseness of the clamp, the controller drives the second clamp to move through the second driving mechanism, increases the clamping force of the clamp on the screw, and synchronizes the rotation speed of the screw with the rotation speed of the servo motor to maintain it within the preset speed range.

[0080] Furthermore, the gripping device for screw grinding in this embodiment also includes: a proximity sensor 8.

[0081] The proximity sensor 8 is disposed on the fixing base 1 at an end away from one end of the first driving mechanism, and the proximity sensor 8 is electrically connected to the controller.

[0082] In this embodiment, the electric cylinder drives the second chuck to move left and right through the fixed block. When the proximity sensor senses that the fixed block and the second chuck have reached a preset position, a position signal of the fixed block is sent to the controller to stop the movement of the fixed block and prevent the fixed block and the second chuck from slipping out of the electric cylinder.

[0083] Furthermore, in the gripping device for screw grinding in this embodiment, a connecting flange 12 is provided on one side of the fixing seat 1, and the connecting flange 12 of the fixing seat 1 is used to connect with the connecting flange of the manipulator, so as to facilitate the connection and fixation of the fixing seat 1 and the manipulator.

[0084] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0085] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A gripping device for grinding a screw, wherein both ends of the screw are provided with clamping holes, characterized in that: include: A fixing seat, a fixture, a first driving mechanism, a second driving mechanism and a controller; The fixing seat is used to connect with the manipulator; The clamp, the first driving mechanism and the second driving mechanism are arranged on the fixing seat; The clamp comprises: a first clamp and a second clamp; The first chuck and the second chuck are both cylindrical, with conical sections at the ends; The first chuck is rotatably disposed on the fixed seat and connected to the first driving mechanism, and the first driving mechanism is used to drive the first chuck to rotate; The second chuck is slidably disposed on the fixing seat and connected to the second driving mechanism. The second driving mechanism is used to drive the second chuck to slide so as to approach and move away from the first chuck. When the second chuck approaches the first chuck, the first chuck and the second chuck are inserted into the clamping hole to clamp the screw, and the first chuck drives the screw to rotate when rotating. The first driving mechanism and the second driving mechanism are electrically connected to the controller respectively.

2. The gripping device for screw grinding according to claim 1, characterized in that: The second driving mechanism comprises: an electric cylinder and a fixed block; The fixing block is arranged on the slide table of the electric cylinder, and the second clamp is arranged on the fixing block.

3. The gripping device for screw grinding according to claim 1, characterized in that: The first driving mechanism comprises: a servo motor, a driving wheel, a driven wheel and a synchronous belt; The servo motor is arranged on the fixing seat and is electrically connected to the controller; The first chuck is arranged on the fixing seat through a bearing seat; The driving wheel and the driven wheel are respectively arranged on the output shaft of the servo motor and the first clamping head, and are connected through the synchronous belt transmission.

4. The gripping device for screw grinding according to claim 1, characterized in that: Also includes: Support rollers; The supporting roller is rotatably arranged on the fixing seat via a rotating shaft, and is used for abutting against the screw rod.

5. The gripping device for screw grinding according to claim 4, characterized in that: Also includes: Support frame; The support frame comprises: a first support plate, a second support plate, a spring, a connecting bolt and a fixing nut; The first support plate is arranged on the fixing seat, the second support plate is connected to the first support plate through the connecting bolt and the fixing nut, the spring is sleeved on the connecting bolt, and two ends of the spring are respectively against the first support plate and the second support plate; The rotating shaft is arranged on the second supporting plate.

6. The gripping device for screw grinding according to claim 5, characterized in that: The fixing seat is provided with a bolt slot; The connecting bolt is slidably arranged in the bolt groove.

7. The gripping device for screw grinding according to claim 5, characterized in that: Also includes: Encoder; The encoder is arranged on the rotating shaft and is electrically connected to the controller for detecting the rotation speed of the screw.

8. The gripping device for screw grinding according to claim 2, characterized in that: Also includes: Proximity sensor; The proximity sensor is arranged on the fixing seat and is electrically connected to the controller, and is used for sending a position signal to the controller when sensing that the fixing block reaches a preset position.

9. The gripping device for screw grinding according to any one of claims 1 to 8, characterized in that: The fixing seat is provided with a connecting flange, and the connecting flange is used to be connected to the manipulator.

Images