Reciprocating driving mechanism and mechanical equipment

Abstract

The utility model provides a reciprocating driving mechanism and mechanical equipment, and relates to the technical field of automobile parts. The mechanism comprises a sliding piece, a rotating piece and a driving unit. The sliding piece is slidably arranged in a first set direction and is used for being in driving connection with a lifting table; the driving unit is in driving connection with the rotating part; the rotating piece is provided with a cam groove, the sliding piece is provided with a driven structure, and the driven structure is inserted into the cam groove; the cam groove is provided with a first groove section, a second groove section and a third groove section which are sequentially connected in the extending direction of the cam groove. When the driven structure and the cam groove move relatively in the extending direction of the cam groove, the first groove section and the third groove section are used for driving the driven structure to move in the first set direction through contact with the driven structure, and the second groove section is used for keeping the position of the driven structure in the first set direction unchanged. The position control requirement, the cost reduction requirement and the reliability requirement of the reciprocating driving mechanism can be met, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a reciprocating drive mechanism and mechanical equipment. Background Art

[0002] In some mechanical equipment, such as a pull-rod type lifting roller bed, a reciprocating drive mechanism is generally used to drive the lifting platform up and down, so that the lifting platform can meet the requirements of rising to contact the workpiece or falling to fall off the workpiece. However, when the lifting platform is driven up and down by the reciprocating drive mechanism, the position control accuracy of the lifting platform is low, and it is easy to collide with the workpiece and cause damage.

[0003] At present, servo motors are generally used and equipped with high-performance frequency converters and position detection units. The position of the lifting platform is detected by the position detection unit, and the motor speed is adjusted by the frequency converter to improve the speed control accuracy and position control accuracy of the lifting platform. However, its cost is relatively high, and the electronic components are easily damaged after long-term use. Utility Model Content

[0004] The utility model aims to solve the problem of how to take into account the position control requirements, cost reduction requirements and reliability requirements of the reciprocating drive mechanism in the related art to a certain extent.

[0005] In order to solve at least one aspect of the above problems to a certain extent, in a first aspect, the utility model provides a reciprocating drive mechanism, the reciprocating drive mechanism comprising a sliding member, a rotating member and a driving unit; the sliding member is slidably arranged in a first set direction, and the sliding member is used to be connected to the lifting platform driving;

[0006] The driving unit is drivingly connected to the rotating member; the rotating member is provided with a cam groove, the sliding member is provided with a driven structure, and the driven structure is inserted into the cam groove;

[0007] The cam groove has a first groove section, a second groove section and a third groove section connected in sequence in its extension direction; when the driven structure and the cam groove move relative to each other in the extension direction of the cam groove, the first groove section and the third groove section are used to drive the driven structure to move in the first set direction by contacting the driven structure, and the second groove section is used to keep the position of the driven structure in the first set direction unchanged.

[0008] Optionally, when the driven structure moves in the first slot segment and the third slot segment along one end of the cam slot to the other end, the movement direction of the driven structure in the first set direction is consistent.

[0009] Optionally, the axial direction of the rotating member is consistent with the first setting direction, and the cam groove is formed on a circumferential side wall of the rotating member.

[0010] Optionally, the cam groove further comprises at least one of a fourth groove segment and a fifth groove segment;

[0011] The fourth slot segment is connected to an end of the first slot segment away from the second slot segment, and when the driven structure and the fourth slot segment move relatively in the extending direction of the fourth slot segment, the fourth slot segment is used to keep the position of the driven structure in the first set direction unchanged;

[0012] The fifth slot segment is connected to an end of the third slot segment away from the second slot segment. When the driven structure and the fifth slot segment move relative to each other in the extension direction of the fifth slot segment, the fifth slot segment is used to keep the position of the driven structure in the first set direction unchanged.

[0013] Optionally, the reciprocating drive mechanism also includes a detection unit and a first reduction unit, the first reduction unit is connected to the drive unit or the rotating member, the reduction unit includes an end rotating wheel, the reduction ratio configuration of the first reduction unit makes the maximum rotation angle of the end rotating wheel less than 360 degrees when the driven structure moves in the cam groove, and the detection unit is used to detect the rotation position of the end rotating wheel.

[0014] Optionally, a positioning block is provided on the circumference of the terminal rotating wheel, and the detection unit is provided with a detection member for detecting the positioning block corresponding to the positioning block;

[0015] The positioning block includes one or more of a first positioning block, a second positioning block, a third positioning block, a fourth positioning block and a fifth positioning block;

[0016] When the first positioning block moves to the corresponding detection member, the driven structure is located at the first end of the cam groove along its extension direction, and the distance between the driven structure and the end surface of the cam groove at the first end of its extension direction is a first preset distance;

[0017] When the second positioning block moves to the corresponding detection member, the driven structure is located at the first end of the cam groove along its extension direction, and the distance between the driven structure and the end surface of the cam groove at the first end of its extension direction is less than a first preset distance;

[0018] When the third positioning block moves to the corresponding detection member, the driven structure is located at the second end of the cam groove along its extension direction, and the distance between the driven structure and the end surface of the cam groove at the second end of its extension direction is a second preset distance;

[0019] When the fourth positioning block moves to the corresponding detection member, the driven structure is located at the second end of the cam groove along its extension direction, and the distance between the driven structure and the end surface of the cam groove at the second end of its extension direction is less than a second preset distance;

[0020] When the fifth positioning block moves to the corresponding detection member, the driven structure is located in the second slot section.

[0021] Optionally, the reciprocating drive mechanism also includes an accumulator, a balancing cylinder and a fixed frame; the sliding member is slidably connected to the fixed frame in the first setting direction, the two ends of the balancing cylinder are respectively hinged to the sliding member and the fixed frame, the accumulator is connected to the setting chamber of the balancing cylinder, and the setting chamber is one of the hydraulic chambers of the balancing cylinder into which the hydraulic medium flows when the lifting platform rises.

[0022] In a second aspect, the utility model provides a mechanical device, which includes a lifting platform and a reciprocating drive mechanism as described in any one of the first aspects above, the lifting platform can be raised and lowered in the direction of gravity, and the sliding member of the reciprocating drive mechanism is drive-connected to the lifting platform.

[0023] Optionally, the sliding direction of the sliding member is set at an angle to the direction of gravity, and the mechanical device also includes a reversing transmission mechanism, which is connected to the sliding member and the lifting platform respectively to convert the sliding of the sliding member into the lifting movement of the lifting platform.

[0024] Optionally, the reversing transmission mechanism is a connecting rod mechanism; and / or, the mechanical equipment is a lifting roller bed.

[0025] Compared with the relevant prior art, in the reciprocating drive mechanism and mechanical equipment of the utility model, the driving unit is arranged to be connected to the driving of the rotating member; wherein, the rotating member is provided with a cam groove, and the sliding member is provided with a driven structure, and the driven structure is inserted in the cam groove; the groove wall of the cam groove in the direction of its groove width can be used to contact the driven structure; thereby, the driving unit can drive the rotating member to rotate, and the relative position of the cam groove and the driven structure will change. When this change in relative position drives the driven structure to move in a first set direction, such as the forward and backward direction, the lifting platform can be driven to rise or fall. Specifically, when the driven structure is inserted in the first slot section or the third slot section and the driving unit drives the rotating member to rotate, the relative positions of the cam slot and the driven structure will change and drive the driven structure to move in the first set direction, that is, the front-to-back direction, so that the lifting platform is lifted and lowered by the movement of the driven structure in the first set direction, such as the front-to-back direction; at the same time, when the driven structure is inserted in the second slot section and the driving unit drives the rotating member to rotate, the cam slot and the driven structure move relative to each other, but the position of the driven structure in the first set direction, such as the front-to-back direction, remains unchanged, so that the position of the lifting platform remains unchanged; in other words, when the reciprocating drive mechanism drives the lifting platform to move to a certain height position, such as the bearing When the height position of the workpiece is connected, the driven structure is inserted in the second groove section. Even if the driving unit drives the rotating part to rotate, the lifting platform will remain at this height position for a certain period of time, which is convenient for the lifting platform to undertake the workpieces transported by the handling robot, etc., and reduce the impact of the lifting platform on the workpiece. Even if the driving unit is not equipped with a frequency converter and a high-precision detection unit, it can ensure the lifting platform's stay at a certain height position and the position control accuracy requirements. The cost is relatively low, and this setting method has high reliability. The utility model can take into account the position control requirements, cost reduction requirements and reliability requirements of the reciprocating drive mechanism, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the exploded structure of the reciprocating drive mechanism in the embodiment of the utility model;

[0027] Figure 2 It is another exploded structural schematic diagram of the reciprocating drive mechanism in the embodiment of the utility model;

[0028] Figure 3 for Figure 1 A partial enlarged view of the middle A;

[0029] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0030] Figure 5 It is a top view schematic diagram of the reciprocating drive mechanism in the embodiment of the utility model;

[0031] Figure 6 for Figure 5 Schematic cross-sectional view of section AA;

[0032] Figure 7 for Figure 5 Schematic diagram of the cross-section of the middle BB section;

[0033] Figure 8 This is a schematic diagram of the state when the lifting platform of the mechanical equipment in the embodiment of the utility model is located at the lower limit position;

[0034] Fig. 9 It is a schematic diagram of the state when the driven structure of the reciprocating drive mechanism of the mechanical equipment in the embodiment of the utility model is located in the second slot section;

[0035] Fig.10 It is a schematic diagram of the state when the lifting platform of the mechanical equipment in the embodiment of the utility model is located at the upper limit position;

[0036] Fig.11 It is a schematic diagram of the corresponding relationship between the rotation angle of the rotating member and the movement speed of the sliding member in the embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1-sliding member; 11-driven structure; 12-first connecting hole; 2-rotating member; 21-cam groove; 211-first groove section; 212-second groove section; 213-third groove section; 3-driving unit; 31-motor; 32-reducer; 4-detection unit; 41-detection member; 411-first detection member; 412-second detection member; 413-third detection member; 414-fourth detection member; 5-first reduction unit; 51-end rotating wheel; 52-positioning block; 521-first positioning block; 522-second positioning block; 523-third positioning block; 524-fourth positioning block; 61-accumulator; 62-balancing cylinder; 63-slider guide mechanism; 64-connecting seat; 71-fixed frame; 8-lifting platform; 9-reversing transmission mechanism; 91-first rod; 92-second rod; 93-third rod; 94-fourth rod; 95-fifth rod. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or embodiment are included in at least one embodiment or embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0042] The terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0043] In the accompanying drawings, the Z axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis (that is, the direction of the arrow of the Z axis) represents the up, and the negative direction of the Z axis represents the down; the X axis in the accompanying drawings represents the front and back position, and the positive direction of the X axis (that is, the direction of the arrow of the X axis) represents the front side, and the negative direction of the X axis represents the back side; the Y axis in the accompanying drawings represents the horizontal direction and is designated as the left and right position, and the positive direction of the Y axis (that is, the direction of the arrow of the Y axis) represents the right side, and the negative direction of the Y axis represents the left side; it should be noted that the aforementioned Z axis, Y axis and X axis 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 cannot be understood as a limitation to the present invention.

[0044] like Figure 1 and Figure 2 , Figures 5 to 7 As shown, in the first aspect, an embodiment of the utility model provides a reciprocating drive mechanism, which includes a sliding member 1, a rotating member 2 and a driving unit 3; the sliding member 1 is slidably arranged in a first set direction, and the sliding member 1 is used to be connected to the lifting platform 8 by driving;

[0045] The driving unit 3 is drivingly connected to the rotating member 2; the rotating member 2 is provided with a cam groove 21, and the sliding member 1 is provided with a driven structure 11, and the driven structure 11 is inserted into the cam groove 21;

[0046] The cam groove 21 has a first groove section 211, a second groove section 212 and a third groove section 213 connected in sequence in its extension direction; when the driven structure 11 and the cam groove 21 move relative to each other in the extension direction of the cam groove 21, the first groove section 211 and the third groove section 213 are used to drive the driven structure 11 to move in a first set direction by contacting with the driven structure 11, and the second groove section 212 is used to keep the position of the driven structure 11 in the first set direction unchanged.

[0047] It should be understood that the driving connection between the sliding member 1 and the lifting platform 8 is not a limitation, and the sliding member 1 can drive the lifting platform 8 to rise and fall when it moves back and forth in the first set direction. This specification will later explain the content of the utility model by setting the sliding direction of the sliding member 1 at an angle to the gravity direction, for example, at a right angle. Specifically, the first set direction is consistent with the front-to-back direction, and the reversing transmission mechanism 9 is respectively connected to the sliding member 1 and the lifting platform 8 to convert the sliding of the sliding member 1 into the lifting movement of the lifting platform 8. The structure of the reversing transmission mechanism 9 is not a limitation, and an exemplary description will be given later.

[0048] The arrangement and structural form of the driven structure 11 on the sliding member 1 are not limited. Exemplarily, the two ends of the bottom of the sliding member 1 along the left and right directions are respectively connected to the fixing frame 71 through the slider guide mechanism 63, and the sliding positioning of the sliding member 1 in the first set direction is realized through the slider guide mechanism 63. The driven structure 11 is arranged at the bottom of the sliding member 1 near the rear end. For example, the sliding member 1 is provided with a connecting seat 64 near the rear end. The connecting seat 64 is passed through the sliding member 1 from top to bottom and is detachably connected to the connecting seat 64. The lower end of the connecting seat 64 is provided with a driven structure 11. The driven structure 11 can be set as, for example, a roller, which is rotatably installed at the lower end of the connecting seat 64, and the axial direction of the roller is consistent with the Z-axis direction.

[0049] In this embodiment, the groove wall of the cam groove 21 in the groove width direction is used to contact the driven structure 11; when the driven structure 11 moves in the cam groove 21 along its extension direction, the points on the first groove segment 211 and the third groove segment 213 in the groove width direction for contacting the driven structure 11 change in the first set direction respectively, and the point on the second groove segment 212 in the groove width direction for contacting the driven structure 11 remains unchanged in the first set direction.

[0050] Specifically, the rotating member 2 is rotatably mounted on the fixed frame 71, and the roller is inserted into the cam groove 21 of the rotating member 2. At any rotation stop position of the rotating member 2, the groove wall of the cam groove 21 in the groove width direction is used to contact the driven structure 11. In the first setting direction, that is, the front-back direction, the cam groove 21 has two side walls opposite to the roller. When the driven structure 11 moves in the cam groove 21 along its extension direction, the point on any groove section of the cam groove 21, such as the first groove section 211, in the groove width direction for contacting the driven structure 11 is constantly changing. When the position of the driven structure 11 is determined, the position of the contact point is determined, and the position of the contact point can change in the first setting direction at most (because the driven structure 11 can only move in the first setting direction). When the position of the contact point in the first setting direction changes, it will push the driven structure 11 to move in the first setting direction. When the position of the contact point in the first setting direction remains unchanged, the position of the driven structure 11 in the first setting direction remains unchanged.

[0051] In some scenarios, the rotating member 2 can rotate so that the front side wall of the cam slot 21 contacts the driven structure 11 and pushes the driven structure 11 to move backward, thereby causing the sliding member 1 to slide backward and drive the lifting platform 8 to achieve one of the movements of rising and falling, such as driving the lifting platform 8 to rise. In some scenarios, the rotating member 2 can also rotate so that the rear side wall of the cam slot 21 contacts the driven structure 11 and pushes the driven structure 11 to move forward, thereby causing the sliding member 1 to slide forward and drive the lifting platform 8 to achieve the other movement of rising and falling, such as driving the lifting platform 8 to fall.

[0052] In this embodiment, the driving unit 3 is configured to be drivingly connected to the rotating member 2; wherein the rotating member 2 is provided with a cam groove 21, and the sliding member 1 is provided with a driven structure 11, and the driven structure 11 is inserted into the cam groove 21; the groove wall of the cam groove 21 in the direction of its groove width can be used to contact the driven structure 11; thereby, the driving unit 3 can drive the rotating member 2 to rotate, and the relative position of the cam groove 21 and the driven structure 11 will change. When this change in relative position pushes the driven structure 11 to move in a first set direction, such as the front and rear direction, the lifting platform 8 can be driven to rise or fall. Specifically, when the driven structure 11 is inserted in the first slot section 211 or the third slot section 213 and the driving unit 3 drives the rotating member 2 to rotate, the relative positions of the cam slot 21 and the driven structure 11 will change and drive the driven structure 11 to move in the first set direction, that is, the front-to-back direction, so that the lifting platform 8 is lifted and lowered by the movement of the driven structure 11 in the first set direction, such as the front-to-back direction; at the same time, when the driven structure 11 is inserted in the second slot section 212 and the driving unit 3 drives the rotating member 2 to rotate, the cam slot 21 and the driven structure 11 move relative to each other, but the position of the driven structure 11 in the first set direction, such as the front-to-back direction, remains unchanged, so that the position of the lifting platform 8 remains unchanged; in other words, when the reciprocating drive mechanism drives the lifting platform 8 to move When it reaches a certain height position, for example, a height position for receiving a workpiece, the driven structure 11 is inserted into the second groove section 212. Even if the driving unit 3 drives the rotating member 2 to rotate, the lifting platform 8 will remain at this height position for a certain period of time, which is convenient for performing corresponding operations at this height position, such as facilitating the lifting platform 8 to receive workpieces transported by a handling robot, etc., reducing the impact of the lifting platform 8 on the workpiece, etc. Even if the driving unit 3 is not equipped with a frequency converter and a high-precision detection unit 4, it can ensure the lifting platform 8's stay at a certain height position and the position control accuracy requirements. The cost is relatively low, and this setting method has high reliability. The utility model can take into account the position control requirements, cost reduction requirements and reliability requirements of the reciprocating drive mechanism, and is highly practical.

[0053] It should be understood that the arrangement of the cam groove 21 may be different if the arrangement of the rotating member 2 is different.

[0054] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, in this embodiment, optionally, the axial direction of the rotating member 2 is consistent with the first set direction, and the cam groove 21 is formed on the circumferential side wall of the rotating member 2.

[0055] Specifically, the rotating member 2 is a camshaft, and the cam groove 21 is generally distributed in a spiral on the circumferential side wall of the rotating member 2. From back to front, along the extension direction of the cam groove 21, the first groove segment 211, the second groove segment 212 and the third groove segment 213 are distributed in sequence.

[0056] In this case, the extension direction of the second slot segment 212 is perpendicular to the first setting direction, and thus, the position of the driven structure 11 in the first setting direction will not change when sliding in the second slot segment 212; correspondingly, or in other words, the extension direction of the second slot segment 212 is perpendicular to the first setting direction, the extension direction of the first slot segment 211 is inclined relative to the extension direction of the second slot segment 212 and the first setting direction, respectively, and the extension direction of the third slot segment 213 is inclined relative to the extension direction of the second slot segment 212 and the first setting direction, respectively. The extension direction of the first slot segment 211 and the third slot segment 213 is neither perpendicular nor parallel to the first set direction. Therefore, when the driven structure 11 slides in the first slot segment 211 or the third slot segment 213, it will be subjected to the force of the first slot segment 211 or the third slot segment 213 along the first set direction. In other words, when the first slot segment 211 or the third slot segment 213 rotates with the sliding member 1, a force will be applied to the driven structure 11 to drive the driven structure 11 to slide relative to the first slot segment 211 or the third slot segment 213, thereby causing the driven structure 11 to move along the first set direction.

[0057] In another embodiment, the axial direction, front-to-back direction, and left-to-right direction of the rotating member 2 can be arranged vertically in pairs. For example, the rotating member 2 is a cam plate, and the cam groove 21 is formed on the axial upper end surface of the cam plate. The following description of the utility model is based on the case where the axial direction of the rotating member 2 is consistent with the first set direction.

[0058] In this way, the layout of the rotating member 2 is facilitated, the structure is simple, and the practicability is strong.

[0059] Optionally, when the driven structure 11 moves from one end to the other end of the cam slot 21 in the first slot segment 211 and the third slot segment 213 , the moving direction of the driven structure 11 in the first set direction is consistent.

[0060] Specifically, when viewed along the positive direction of the X-axis, the counterclockwise rotation of the rotating member 2 around its axis is defined as the positive rotation of the rotating member 2 , and the clockwise rotation of the rotating member 2 around its axis is defined as the negative rotation of the rotating member 2 .

[0061] Exemplarily, when the driven structure 11 is located in the cam groove 21, and the rotating member 2 rotates forward, so that the driven structure 11 moves from the first groove section 211 to the third groove section 213, the rear side wall of the cam groove 21 contacts the driven structure 11 and pushes the driven structure 11 to move forward, so that the sliding member 1 slides forward and drives the lifting platform 8 to descend. In this process, when the driven structure 11 moves in the first groove section 211 and the third groove section 213, the driven structure 11 moves forward and drives the sliding member 1 to slide forward, thereby driving the lifting platform 8 to descend. When the driven structure 11 moves in the second groove section 212, the position of the driven structure 11 in the front-to-back direction remains unchanged, and the position of the lifting platform 8 remains unchanged.

[0062] When the driven structure 11 is located in the cam groove 21, and the rotating member 2 is reversed, so that the driven structure 11 moves from the third groove section 213 to the first groove section 211, the front side wall of the cam groove 21 contacts the driven structure 11 and pushes the driven structure 11 to move backward, so that the sliding member 1 slides backward and drives the lifting platform 8 to rise. In this process, when the driven structure 11 moves in the first groove section 211 and the third groove section 213, the driven structure 11 moves backward and drives the sliding member 1 to slide backward, thereby driving the lifting platform 8 to rise. When the driven structure 11 moves in the second groove section 212, the position of the driven structure 11 in the front-to-back direction remains unchanged, and the position of the lifting platform 8 remains unchanged.

[0063] In this way, during the forward or reverse rotation of the rotating part 2, the sliding part 1 moves in a single direction forward or backward, thereby driving the lifting platform 8 to rise or fall. During the rising or falling process of the lifting platform 8, it will stay at a height position for a period of time (corresponding to the second groove section 212), thereby meeting the use requirements at this height position. For example, it can stay at this height position and receive the workpiece and then continue to move upward.

[0064] Optionally, the cam groove 21 further comprises a fourth groove section; when the driven structure 11 and the fourth groove section move relative to each other in the extension direction of the fourth groove section, the fourth groove section is used to keep the position of the driven structure 11 in the first set direction unchanged. That is, the extension direction of the fourth groove section is perpendicular to the first set direction, and thus, the position of the driven structure 11 in the first set direction does not change when sliding in the fourth groove section.

[0065] Specifically, when the driven structure 11 moves in the cam groove 21 along its extending direction, the point on the fourth groove segment in the groove width direction for contacting the driven structure 11 remains unchanged in the first set direction.

[0066] In this way, when the driven structure 11 and the fourth slot segment move relative to each other through the rotation of the rotating member 2, the position of the driven structure 11 in the first set direction remains unchanged, so that the lifting platform 8 maintains its position unchanged at another height position for a short time, achieving an effect similar to position locking and meeting corresponding usage requirements.

[0067] Optionally, the cam groove 21 further comprises a fifth groove section; when the driven structure 11 and the fifth groove section move relative to each other in the extension direction of the fifth groove section, the fifth groove section is used to keep the position of the driven structure 11 in the first set direction unchanged. That is, the extension direction of the fifth groove section is perpendicular to the first set direction, and thus, the position of the driven structure 11 in the first set direction does not change when sliding in the fifth groove section.

[0068] Similarly, when the driven structure 11 and the fifth slot segment move relative to each other through the rotation of the rotating member 2, the position of the driven structure 11 in the first set direction remains unchanged, so that the lifting platform 8 maintains its position unchanged at another height position for a short time, achieving an effect similar to position locking and meeting corresponding usage requirements.

[0069] It should be understood that in some scenarios, the cam groove 21 has both the fourth groove segment and the fifth groove segment, which will not be described in detail here.

[0070] like Figures 1 to 4 As shown, optionally, the reciprocating drive mechanism also includes a detection unit 4 and a first reduction unit 5, the first reduction unit 5 is connected to the drive unit 3 or the rotating member 2, the reduction unit includes an end rotating wheel 51, and the reduction ratio configuration of the first reduction unit 5 makes the maximum rotation angle of the end rotating wheel 51 less than 360 degrees when the driven structure 11 moves in the cam groove 21, and the detection unit 4 is used to detect the rotation position of the end rotating wheel 51.

[0071] The specific structure of the first reduction unit 5 is not limited, and it only needs to meet the configuration requirements of the reduction ratio, for example Figures 1 to 4 It is shown that the driving unit 3 includes a motor 31 and a reducer 32, the output shaft of the reducer 32 and the cam shaft are coaxially arranged, and the first reduction unit 5 may include a synchronous pulley set, wherein the small pulley of the synchronous pulley set is coaxially arranged and connected with the output shaft, and the terminal rotating wheel 51 is formed on the large pulley of the synchronous pulley set. Therefore, when the driven structure 11 is at any position of the cam groove 21, the terminal rotating wheel 51 has a rotation position corresponding to it, and the detection unit 4 can obtain the position of the driven structure 11 in the cam groove 21 by detecting the rotation position of the terminal rotating wheel 51, and obtain the position of the lifting platform 8 in the up and down direction.

[0072] Optionally, a positioning block 52 is provided on the circumference of the terminal rotating wheel 51 , and the detection unit 4 is provided with a detection member 41 corresponding to the positioning block 52 for detecting the positioning block 52 .

[0073] Specifically, when the detection member 41 detects the positioning block 52 , it indicates that the driven structure 11 moves to a certain position in the positioning groove, and the lifting platform 8 moves to a certain lifting height.

[0074] Optionally, the positioning block 52 includes one or more of a first positioning block 521 , a second positioning block 522 , a third positioning block 523 , a fourth positioning block 524 and a fifth positioning block.

[0075] When the first positioning block 521 moves to the corresponding detection member 41 (for example, the first detection member 411), the driven structure 11 is located at the first end of the cam groove 21 along its extension direction, and the distance between the driven structure 11 and the end face of the cam groove 21 at the first end of its extension direction is a first preset distance.

[0076] The first preset distance and the second preset distance described below can be determined according to actual conditions, for example, can be 5-20 mm.

[0077] That is, when the first detection member 411 detects the first positioning block 521, it indicates that the driven structure 11 moves to the set limit position of the first end of the cam slot 21. In this case, illustratively, when the lifting platform 8 moves to the set upper limit position, the motor 31 needs to be controlled to stop rotating, so as to stop the lifting platform 8 at this position.

[0078] When the second positioning block 522 moves to the corresponding detection member 41 (for example, the second detection member 412), the driven structure 11 is located at the first end of the cam groove 21 along its extension direction, and the distance between the driven structure 11 and the end face of the cam groove 21 at the first end of its extension direction is less than the first preset distance.

[0079] That is to say, when the second detection member 412 detects the second positioning block 522, it indicates that the driven structure 11 moves to a position exceeding the set limit position of the first end of the cam slot 21, for example, moves to the physical limit position of the first end of the cam slot 21, for example, is in a position where it will collide with the end face of the first end. In this case, illustratively, when the driven structure 11 moves beyond the set limit position of the first end of the cam slot 21, that is, when the lifting platform 8 moves upward beyond its upper limit position, it is necessary to control the motor 31 to stop rotating again to play a safety protection role.

[0080] When the third positioning block 523 moves to the corresponding detection member 41 (for example, the third detection member 413), the driven structure 11 is located at the second end of the cam groove 21 along its extension direction, and the distance between the driven structure 11 and the end face of the cam groove 21 at the second end of its extension direction is a second preset distance.

[0081] That is, when the third detection member 413 detects the third positioning block 523, it indicates that the driven structure 11 moves to the set limit position of the second end of the cam slot 21. In this case, illustratively, when the lifting platform 8 moves to the set lower limit position, the motor 31 needs to be controlled to stop rotating, so as to stop the lifting platform 8 at this position.

[0082] When the fourth positioning block 524 moves to the corresponding detection member 41 (for example, the fourth detection member 414), the driven structure 11 is located at the second end of the cam groove 21 along its extension direction, and the distance between the driven structure 11 and the end face of the cam groove 21 at the second end of its extension direction is less than the second preset distance.

[0083] That is to say, when the fourth detection member 414 detects the fourth positioning block 524, it indicates that the driven structure 11 moves to a position exceeding the set limit position of the second end of the cam slot 21, for example, moves to a physical limit position of the second end of the cam slot 21, for example, is in a position where it will collide with the end face of the second end. In this case, illustratively, when the driven structure 11 moves beyond the set limit position of the second end of the cam slot 21, that is, when the lifting platform 8 moves downward beyond its lower limit position, it is necessary to control the motor 31 to stop rotating again to play a safety protection role.

[0084] When the fifth positioning block moves to the corresponding detection member 41 (for example, the fourth detection member 414 ), the driven structure 11 is located in the second slot section 212 .

[0085] That is to say, when the fifth detection member 41 detects the fifth positioning block, it indicates that the driven structure 11 moves to exceed the second slot section 212 of the cam slot 21, and the lifting platform 8 moves to the preset stop position. It is necessary to control the motor 31 to stop rotating to ensure that the position of the lifting platform 8 remains unchanged.

[0086] like Figure 1 and Figure 2 As shown, optionally, the reciprocating drive mechanism also includes an accumulator 61, a balancing cylinder 62 and a fixed frame 71; the sliding member 1 is slidably connected to the fixed frame 71 in a first set direction, and the two ends of the balancing cylinder 62 are respectively hinged to the sliding member 1 and the fixed frame 71, and the accumulator 61 is connected to the setting chamber of the balancing cylinder 62, and the setting chamber is a hydraulic chamber of the balancing cylinder 62 into which the hydraulic medium flows when the lifting platform 8 rises.

[0087] In this embodiment, when the sliding member 1 moves from front to back, the lifting platform 8 rises, and the setting chamber can be the front hydraulic chamber of the balancing cylinder 62. In this way, when the lifting platform 8 rises, the accumulator 61 does positive work, and when the lifting platform 8 descends, the accumulator 61 does negative work. A continuous unidirectional thrust is provided by the accumulator 61 and the balancing cylinder 62 to balance the self-gravity of the lifting platform 8. The thrust can be controlled by adjusting the pressure of the accumulator 61, which can reduce the power demand for the motor 31 and improve the stability of the lifting and lowering movement of the lifting platform 8 to a certain extent.

[0088] The balancing cylinder 62 can be provided in two on the left and right sides, and correspondingly, the accumulator 61 can also be provided in two on the left and right sides, which will not be described in detail here.

[0089] like Fig.11As shown, it schematically shows a schematic diagram of the corresponding relationship between the rotation angle of the rotating member 2 and the movement speed of the sliding member 1. The sliding member 1 has a zero-speed interval during the movement process, and the zero-speed interval corresponds to the second slot segment 212 of the cam slot 21. The sliding member 1 can also have zero-speed intervals at both ends of the movement stroke, corresponding to the fourth slot segment and the fifth slot segment respectively, which will not be described in detail here.

[0090] like Figures 8 to 10 As shown, in the second aspect, the utility model provides a mechanical device, which includes a lifting platform 8 and a reciprocating drive mechanism as described in the above embodiment. The lifting platform 8 can be raised and lowered in the direction of gravity, and the sliding member 1 of the reciprocating drive mechanism is drivingly connected to the lifting platform 8.

[0091] Optionally, the sliding direction of the sliding member 1 is set at an angle to the gravity direction, and the mechanical equipment also includes a reversing transmission mechanism 9, which is respectively connected to the sliding member 1 and the lifting platform 8 to convert the sliding of the sliding member 1 into the lifting movement of the lifting platform 8.

[0092] Exemplarily, the sliding direction of the sliding member 1 is consistent with the front-rear direction, and the reversing rotation mechanism converts the backward movement of the sliding member 1 into the upward movement of the lifting platform 8, and converts the forward movement of the sliding member 1 into the downward movement of the lifting platform 8.

[0093] Optionally, the reversing transmission mechanism 9 is a connecting rod mechanism.

[0094] Exemplarily, the connecting rod mechanism is a parallel four-bar linkage mechanism, and the sliding member 1 is slidably and rotatably connected to one of the rocker arms, so that the forward and backward movement of the sliding member 1 can drive the rocker arm to swing, and both rocker arms are slidably and rotatably connected to the lifting platform 8. The lifting platform 8 can have a sliding guide for lifting movement, which will not be described in detail here.

[0095] like Figures 8 to 10As shown, exemplarily, the connecting mechanism includes a first rod 91, a second rod 92, a third rod 93, a fourth rod 94 and a fifth rod 95; the first end of the first rod 91 is hinged to the first connecting hole 12 of the sliding member 1; the second end of the first rod 91, the first end of the second rod 92 and the first end of the third rod 93 are hinged; the second end of the third rod 93 and the first end of the fourth rod 94 are hinged; the first end of the fifth rod 95 is hinged to the lifting platform 8, and the second end is slidably and rotatably connected to the frame at the A connection position, and the fifth The position between the first end and the second end of the rod 95 is hinged to the second end of the fourth rod 94; the second end of the second rod 92 is connected to the lifting platform 8 in a sliding and rotatable manner; the position between the first end and the second end of the fourth rod 94 is hinged to the frame at the B connection position, and the first end, the second end and the B connection position of the fourth rod 94 are roughly distributed in a triangle; the position between the first end and the second end of the second rod 92 is hinged to the frame at the C connection position, and the first end, the second end and the C connection position of the second rod 92 are roughly distributed in a triangle. When the sliding member 1 slides backward, it can drive the first rod 91 to swing, and together with the third rod 93, the second rod 92, the fourth rod 94 and the fifth rod 95 move with it, so that the lifting platform 8 moves upward under the guidance of the guide structure, and when the sliding member 1 slides forward, the lifting platform 8 moves downward.

[0096] Optionally, the mechanical equipment is a lifting roller bed, for example, when the reversing transmission structure is a connecting rod mechanism, it is a pull rod type lifting roller bed.

[0097] In a third aspect, the utility model provides an automobile production line, which includes the mechanical equipment of the above embodiment.

[0098] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A reciprocating drive mechanism, characterized in that: The reciprocating drive mechanism comprises a sliding member (1), a rotating member (2) and a driving unit (3); the sliding member (1) is arranged to slide in a first set direction, and the sliding member (1) is used to be connected to the lifting platform (8) for driving; The driving unit (3) is drivingly connected to the rotating member (2); the rotating member (2) is provided with a cam groove (21), the sliding member (1) is provided with a driven structure (11), and the driven structure (11) is inserted into the cam groove (21); The cam groove (21) has a first groove section (211), a second groove section (212) and a third groove section (213) connected in sequence in its extension direction; when the driven structure (11) and the cam groove (21) move relative to each other in the extension direction of the cam groove (21), the first groove section (211) and the third groove section (213) are used to drive the driven structure (11) to move in the first set direction by contacting the driven structure (11), and the second groove section (212) is used to keep the position of the driven structure (11) in the first set direction unchanged.

2. The reciprocating drive mechanism according to claim 1, characterized in that: When the driven structure (11) moves along one end of the cam groove (21) to the other end in the first groove section (211) and the third groove section (213), the movement direction of the driven structure (11) in the first set direction is consistent.

3. The reciprocating drive mechanism according to claim 1, characterized in that: The axial direction of the rotating member (2) is consistent with the first set direction, and the cam groove (21) is formed on the circumferential side wall of the rotating member (2).

4. The reciprocating drive mechanism according to claim 1, characterized in that: The cam groove (21) further comprises at least one of a fourth groove segment and a fifth groove segment; The fourth slot section is connected to an end of the first slot section (211) away from the second slot section (212), and when the driven structure (11) and the fourth slot section move relative to each other in the extension direction of the fourth slot section, the fourth slot section is used to keep the position of the driven structure (11) in the first set direction unchanged; The fifth slot section is connected to an end of the third slot section (213) away from the second slot section (212), and when the driven structure (11) and the fifth slot section move relative to each other in the extension direction of the fifth slot section, the fifth slot section is used to keep the position of the driven structure (11) in the first set direction unchanged.

5. The reciprocating drive mechanism according to any one of claims 1 to 4, characterized in that: The reciprocating drive mechanism further comprises a detection unit (4) and a first reduction unit (5), wherein the first reduction unit (5) is connected to the drive unit (3) or the rotating member (2), and the reduction unit comprises a terminal rotating wheel (51). The reduction ratio of the first reduction unit (5) is configured such that when the driven structure (11) moves in the cam groove (21), the maximum rotation angle of the terminal rotating wheel (51) is less than 360 degrees, and the detection unit (4) is used to detect the rotation position of the terminal rotating wheel (51).

6. The reciprocating drive mechanism according to claim 5, characterized in that: A positioning block (52) is provided on the circumference of the terminal rotating wheel (51), and the detection unit (4) is provided with a detection member (41) corresponding to the positioning block (52) for detecting the positioning block (52); The positioning block (52) comprises one or more of a first positioning block (521), a second positioning block (522), a third positioning block (523), a fourth positioning block (524) and a fifth positioning block; When the first positioning block (521) moves to the corresponding detection member (41), the driven structure (11) is located at the first end of the cam groove (21) along its extension direction, and the distance between the driven structure (11) and the end surface of the cam groove (21) located at the first end of its extension direction is a first preset distance; When the second positioning block (522) moves to the corresponding detection member (41), the driven structure (11) is located at the first end of the cam groove (21) along its extension direction, and the distance between the driven structure (11) and the end surface of the cam groove (21) located at the first end of its extension direction is less than a first preset distance; When the third positioning block (523) moves to the corresponding detection member (41), the driven structure (11) is located at the second end of the cam groove (21) along its extension direction, and the distance between the driven structure (11) and the end surface of the cam groove (21) located at the second end of its extension direction is a second preset distance; When the fourth positioning block (524) moves to the corresponding detection member (41), the driven structure (11) is located at the second end of the cam groove (21) along its extension direction, and the distance between the driven structure (11) and the end surface of the cam groove (21) located at the second end of its extension direction is less than a second preset distance; When the fifth positioning block moves to the corresponding detection member (41), the driven structure (11) is located in the second slot section (212).

7. The reciprocating drive mechanism according to any one of claims 1 to 4, characterized in that: The reciprocating drive mechanism further comprises an accumulator (61), a balancing cylinder (62) and a fixed frame (71); the sliding member (1) is slidably connected to the fixed frame (71) in the first setting direction, the two ends of the balancing cylinder (62) are respectively hinged to the sliding member (1) and the fixed frame (71), the accumulator (61) is connected to the setting chamber of the balancing cylinder (62), and the setting chamber is a hydraulic chamber of the balancing cylinder (62) into which the hydraulic medium flows when the lifting platform (8) rises.

8. A mechanical device, characterized in that: The mechanical device comprises a lifting platform (8) and a reciprocating drive mechanism as described in any one of claims 1 to 7, wherein the lifting platform (8) can be raised and lowered in the direction of gravity, and a sliding member (1) of the reciprocating drive mechanism is drivingly connected to the lifting platform (8).

9. The mechanical device according to claim 8, characterized in that: The sliding direction of the sliding member (1) is set at an angle with the direction of gravity. The mechanical device also includes a reversing transmission mechanism (9). The reversing transmission mechanism (9) is respectively connected to the sliding member (1) and the lifting platform (8) to convert the sliding of the sliding member (1) into the lifting movement of the lifting platform (8).

10. The mechanical device according to claim 9, characterized in that: The reversing transmission mechanism (9) is a connecting rod mechanism; and / or the mechanical device is a lifting roller bed.

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