Positioning mechanism and conveying device

Abstract

The utility model provides a positioning mechanism and a conveying device, and the positioning mechanism comprises a mounting seat which is provided with a mounting channel suitable for accommodating a workpiece in a limiting manner; the positioning assembly comprises a plurality of centering blocks, and the multiple centering blocks are arranged on the mounting base in the circumferential direction of the mounting channel; the transmission assembly is provided with an input end and an output end, the output end is connected with the centering blocks and drives the centering blocks to synchronously move in the radial direction of the mounting channel, so that the positioning assembly is switched between a first state and a second state, when the positioning assembly is in the first state, the centering blocks abut against the workpiece to position the workpiece, and when the positioning assembly is in the second state, the centering blocks abut against the workpiece; when the positioning assembly is in the second state, the multiple centering blocks are spaced from the workpiece. According to the positioning mechanism, the transmission assembly is used for driving the centering blocks to clamp or loosen the workpiece in the radial direction of the installation channel, automatic centering can be carried out in multiple directions, and the positioning precision can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of production equipment, and more specifically, to a positioning mechanism and a conveying device. Background Art

[0002] In the related art, the battery production process needs to first position the battery cell and then process it. For example, in the collector plate welding process, the positioning accuracy between the collector plate and the battery cell will greatly affect the welding quality, thereby affecting the battery yield. In the prior art, a clamping V-block pneumatic positioning mechanism is used to position the battery, but its positioning accuracy is not high, and it is difficult to ensure the concentricity of the battery cell and the collector plate. In addition, the positioning mechanism has high requirements on the battery cell incoming materials and parts machining accuracy. Utility Model Content

[0003] The utility model provides a new technical solution for a positioning mechanism, which can at least solve the problem of low positioning accuracy of the positioning mechanism in the prior art.

[0004] The utility model also provides a conveying device, comprising the above positioning mechanism.

[0005] According to the first aspect of the utility model, a positioning mechanism is provided, comprising: a mounting seat, the mounting seat defining a mounting channel suitable for accommodating a workpiece; a positioning assembly, the positioning assembly comprising a plurality of centering blocks, the plurality of centering blocks being arranged on the mounting seat along the circumference of the mounting channel; a transmission assembly, the transmission assembly having an input end and an output end, the output end being connected to the plurality of centering blocks and driving the plurality of centering blocks to move synchronously along the radial direction of the mounting channel, so that the positioning assembly switches between a first state and a second state, when the positioning assembly is in the first state, the plurality of centering blocks are respectively in contact with the workpiece to position the workpiece, and when the positioning assembly is in the second state, the plurality of centering blocks are respectively spaced apart from the workpiece to form gaps.

[0006] Optionally, the output end 1331 protrudes from the surface of the mounting seat 11 .

[0007] Optionally, the number of the centering blocks is ≥4.

[0008] Optionally, the centering block has a first arcuate surface at one end facing the mounting channel, and the first arcuate surface is recessed in a direction away from the mounting channel.

[0009] Optionally, the centering block has a second arcuate surface at one end away from the mounting channel, and the transmission assembly includes: a transmission wheel, which is annular, and has a plurality of first guide surfaces arranged circumferentially at intervals on its inner circumferential surface, the first guide surfaces abutting against the second arcuate surfaces, and in the radial direction of the transmission wheel, the first guide surfaces are inclined toward the mounting channel, and a step is formed between two adjacent first guide surfaces, the transmission wheel is coaxially arranged with the mounting channel, and the transmission wheel can rotate around its own axis to drive the plurality of centering blocks to move synchronously along the radial direction of the mounting channel.

[0010] Optionally, the positioning mechanism also includes: a plurality of first elastic members, the plurality of first elastic members are arranged along the circumference of the mounting channel, each of the first elastic members is retractable in the radial direction of the mounting channel, each of the first elastic members is connected to the mounting seat at one end close to the mounting channel, and each of the centering blocks is connected to the other end of at least one of the first elastic members to press the centering block against the second arc-shaped surface.

[0011] Optionally, each of the centering blocks is provided with a stop pin, each of the stop pins passes through the centering block in the circumferential direction of the installation channel, and connecting seats are respectively provided at both ends of the stop pin, and the connecting seats are connected to the first elastic member.

[0012] Optionally, a toggle portion is provided on the outer circumferential surface of the transmission wheel, and the transmission assembly further includes: a toggle member, which is movable between a first position and a second position along a first direction, and a matching portion is provided on the toggle member, and the matching portion cooperates with the toggle portion to drive the transmission wheel to rotate, and when the toggle member is in the first position, the positioning assembly is in the first state; when the toggle member is in the first position, the positioning assembly is in the second state.

[0013] Optionally, the transmission assembly further includes: a transmission rod capable of linear motion, one end of the transmission rod being connected to the toggle member, and the other end of the transmission rod forming the input end.

[0014] Optionally, the input end protrudes from the outer surface of the mounting seat, and when the toggle member is in the first position, the length of the input end protruding from the outer surface of the mounting seat is L1, and when the toggle member is in the first position, the length of the input end protruding from the outer surface of the mounting seat is L2, and L1<L2.

[0015] Optionally, the shifting portion includes a plurality of first teeth arranged along the circumference of the transmission wheel, the shifting member includes a rack, and the matching portion includes a plurality of second teeth arranged along the first direction, and the first teeth mesh with the second teeth for transmission.

[0016] Optionally, the transmission rod extends along the first direction and is movable along the first direction.

[0017] Optionally, the toggle portion includes a protrusion protruding radially outward along the transmission wheel, a groove is provided at one end of the protrusion away from the mounting channel, the toggle member includes a guide block, a guide groove is provided on the mounting seat, the guide groove extends along the first direction, the guide block is movable along the guide groove, and the mating portion is a first drive column, which is inserted into the groove.

[0018] Optionally, the transmission rod extends along a second direction and is movable along the second direction, the second direction is respectively perpendicular to the first direction and the axial direction of the transmission wheel, the end of the transmission rod connected to the toggle member has a second guide surface, the second guide surface is respectively inclined relative to the first direction and the second direction, a second driving column is provided on the toggle member, the second driving column is parallel to the first driving column, the second guide surface abuts against the second driving column and drives the toggle member to move along the first direction.

[0019] Optionally, it is characterized in that the positioning mechanism also includes: a second elastic member, one end of the second elastic member is connected to the toggle member, the other end of the second elastic member is connected to the mounting seat, the second elastic member is retractable in the first direction, and is used to drive the toggle member to move from the second position to the first position.

[0020] Optionally, the mounting seat includes: a front cover plate; a rear cover plate, the rear cover plate is covered on the front cover plate, and cooperates with the front cover plate to define an installation space suitable for accommodating the positioning assembly and the transmission assembly, the installation channel passes through at least one of the front cover plate and the rear cover plate along the thickness direction of the front cover plate, and the installation space has an opening, and the opening is located at the ends of the front cover plate and the rear cover plate; a side cover plate, and the side cover plate is covered at the opening.

[0021] According to a second aspect of the utility model, a conveying device is provided, comprising: a positioning mechanism, the positioning mechanism being any one of the positioning mechanisms described in the above embodiments; and a conveying mechanism, the conveying mechanism being used to convey the positioning mechanism.

[0022] According to the positioning mechanism of the utility model, a plurality of centering blocks are arranged around the installation channel, and the transmission assembly is used to drive the plurality of centering blocks to clamp or release the workpiece along the radial direction of the installation channel, so that automatic centering can be performed in multiple directions, thereby realizing positioning of the workpiece. Compared with the traditional V-shaped pneumatic positioning jaws, the positioning mechanism of the utility model can prevent the workpiece from being offset in one direction due to the problem of contact before and after during positioning, which is beneficial to improving the positioning accuracy, thereby improving the processing accuracy and the yield of the product.

[0023] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 This is a front view of a positioning mechanism according to an embodiment of the utility model;

[0026] Figure 2 is a cross-sectional view of a positioning mechanism according to an embodiment of the utility model when the positioning assembly is in a first state;

[0027] Figure 3 It is a three-dimensional diagram of a toggle member, a transmission rod and a second elastic member in a positioning mechanism according to an embodiment of the utility model when the positioning assembly is in a first state;

[0028] Figure 4 It is a cross-sectional view of a toggle member, a transmission rod and a second elastic member in a positioning mechanism according to an embodiment of the utility model when the positioning assembly is in a first state;

[0029] Figure 5 is a cross-sectional view of a positioning mechanism according to an embodiment of the utility model when the positioning assembly is in a second state;

[0030] Figure 6 It is a three-dimensional diagram of a toggle member, a transmission rod and a second elastic member in a positioning mechanism according to an embodiment of the utility model when the positioning assembly is in a second state;

[0031] Figure 7 It is a cross-sectional view of a toggle member, a transmission rod and a second elastic member in a positioning mechanism according to an embodiment of the utility model when the positioning assembly is in a second state;

[0032] Figure 8 It is a front view of a transmission wheel and a positioning assembly in a positioning mechanism according to an embodiment of the utility model;

[0033] Fig. 9 This is a front view of a transmission wheel in a positioning mechanism according to an embodiment of the utility model;

[0034] Fig.10 It is a stereoscopic diagram of a positioning component in a positioning mechanism according to an embodiment of the utility model;

[0035] Fig.11 It is a schematic diagram of the cooperation between a centering block, a stop pin, a connecting seat and a first elastic member in a positioning mechanism according to an embodiment of the present utility model;

[0036] Fig.12 It is a front view of a positioning mechanism according to another embodiment of the utility model;

[0037] Fig.13 is a cross-sectional view of a positioning mechanism according to another embodiment of the utility model when the positioning assembly is in a first state;

[0038] Fig.14 is a three-dimensional diagram of a conveying device according to an embodiment of the utility model;

[0039] Fig.15 It is a side view of a conveying device according to an embodiment of the utility model.

[0040] Reference numerals

[0041] Conveying device 100;

[0042] Positioning mechanism 10;

[0043] Mounting seat 11;

[0044] Front cover plate 111; rear cover plate 112; side cover plate 113; installation channel 114; installation space 115; guide channel 116; bushing 117;

[0045] Positioning assembly 12; centering block 121; first arc surface 1211; second arc surface 1212; stop pin 122; connecting seat 123; centering wheel 124;

[0046] Transmission assembly 13; transmission wheel 131; first guide surface 1311; step 1312; first tooth portion 1313; protrusion 1314; groove 1315; toggle member 132; rack 1321; guide block 1322; second tooth portion 1323; first driving column 1324; second driving column 1325; transmission rod 133; output end 1331; second guide surface 1332; first elastic member 14; second elastic member 15;

[0047] Conveying mechanism 20;

[0048] Driving mechanism 30. DETAILED DESCRIPTION

[0049] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0051] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0052] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0053] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0054] The positioning mechanism 10 according to the embodiment of the utility model is first described in detail below with reference to the accompanying drawings.

[0055] like Figures 1 to 13 As shown, the positioning mechanism 10 according to the embodiment of the utility model includes: a mounting seat 11, a positioning assembly 12 and a transmission assembly 13.

[0056] Specifically, the mounting seat 11 is defined with a mounting channel 114 suitable for accommodating a workpiece. The positioning assembly 12 includes a plurality of centering blocks 121, and the plurality of centering blocks 121 are arranged on the mounting seat 11 along the circumference of the mounting channel 114. The transmission assembly 13 has an input end and an output end 1331, and the output end 1331 is connected to the plurality of centering blocks 121 and drives the plurality of centering blocks 121 to move synchronously along the radial direction of the mounting channel 114, so that the positioning assembly 12 switches between a first state and a second state. When the positioning assembly 12 is in the first state, the plurality of centering blocks 121 are respectively in contact with the workpiece to position the workpiece. When the positioning assembly 12 is in the second state, the plurality of centering blocks 121 are respectively spaced apart from the workpiece to form a gap.

[0057] In other words, the positioning mechanism 10 according to the embodiment of the utility model is mainly composed of a mounting seat 11, a positioning assembly 12 and a transmission assembly 13. The positioning mechanism 10 can position the workpiece, and the shape of the workpiece can include but is not limited to a cylindrical, elliptical, and polygonal shape. Optionally, the workpiece can be a battery cell for manufacturing cylindrical batteries, and the positioning mechanism 10 can position the battery cell without a welded collector plate, and then weld the collector plate to the end of the battery cell through a welding device to improve the concentricity of the collector plate and the battery cell, improve the welding quality and the yield rate of battery production.

[0058] Specifically, the mounting seat 11 may be provided with a mounting channel 114, and the size of the mounting channel 114 may allow the workpiece to enter and exit freely. For example, the mounting channel 114 may be cylindrical, and the diameter of the mounting channel 114 may be larger than the diameter of the battery cell used to produce the cylindrical battery. At least one of the two ends of the mounting channel 114 is open to allow the workpiece to enter and exit the mounting channel 114.

[0059] The positioning assembly 12 can be mainly composed of a plurality of centering blocks 121, and the plurality of centering blocks 121 are arranged around the mounting channel 114. Optionally, the plurality of centering blocks 121 can be evenly spaced along the circumference of the mounting channel 114. At least two centering blocks 121 are provided to achieve clamping and positioning of the workpiece. Each centering block 121 is movable relative to the mounting seat 11 along the radial direction of the mounting channel 114 to extend into or out of the mounting channel 114.

[0060] The transmission assembly 13 may have an input end and an output end 1331, and the input end and the output end 1331 may be connected to each other through a transmission structure, and the transmission method may include but is not limited to gear transmission, cam transmission, and linear transmission. The output end may be driven by an external driving mechanism 30 to transmit power, and the output end 1331 may be connected to a plurality of centering blocks 121.

[0061] The transmission assembly 13 can transmit the power of the external driving mechanism 30 to the centering block 121 to drive each centering block 121 to move synchronously along the axial direction of the installation channel 114 to achieve the switching of the positioning assembly 12 between the first state and the second state.

[0062] When the positioning assembly 12 is in the first state, a portion of the plurality of centering blocks 121 can extend into the installation channel 114 and respectively abut against the outer circumference of the workpiece, so that the axis of the workpiece coincides with the axis of the installation channel 114 to achieve concentric positioning of the workpiece.

[0063] When the positioning assembly 12 is in the second state, the multiple centering blocks 121 can be separated from the workpiece. For example, the multiple centering blocks 121 can withdraw from the installation channel 114. Since the size of the installation channel 114 is larger than the workpiece, the workpiece can freely enter and exit the installation channel 114 to facilitate loading or unloading of the workpiece.

[0064] Therefore, according to the positioning mechanism 10 of the embodiment of the utility model, a plurality of centering blocks 121 are arranged around the installation channel 114, and the transmission assembly 13 is used to drive the plurality of centering blocks 121 to clamp or release the workpiece radially along the installation channel 114, and automatic centering can be performed in multiple directions, thereby achieving concentric positioning of the workpiece. Compared with the traditional V-shaped pneumatic positioning jaws, the positioning mechanism 10 of the utility model can prevent the workpiece from being unidirectionally offset due to the problem of contact before and after during positioning, which is beneficial to improving the positioning accuracy, thereby improving the processing accuracy and the yield of the product.

[0065] In addition, multiple positioning blocks can be processed simultaneously in the same batch, which reduces the processing difficulty and reduces the impact on the final accuracy.

[0066] According to an embodiment of the present invention, the output end 1331 protrudes from the surface of the mounting seat 11 , so that the external driving mechanism 30 can drive the output end 1331 conveniently.

[0067] Specifically, since the output end 1331 protrudes from the surface of the mounting base 11, the size of the end of the driving mechanism 30 that contacts the output end 1331 can be designed to be larger than the size of the output end 1331, so that when the positioning mechanism 10 is positionally offset in the conveying direction, the driving mechanism 30 can still stably drive the output end 1331.

[0068] In some other embodiments, the output end 1331 may be accommodated in the positioning mechanism 10 , and a portion of the driving mechanism 30 may extend into the positioning mechanism 10 to drive the output end 1331 .

[0069] According to an embodiment of the utility model, the number of the centering blocks 121 is ≥ 4. The four centering blocks 121 can simultaneously perform concentric positioning of the workpiece from four directions, for example, the four directions can be the positive and negative directions of two directions perpendicular to each other, thereby limiting the two translational degrees of freedom and two rotational degrees of freedom of the centering blocks 121, which is not only conducive to improving the positioning accuracy and avoiding the workpiece from being offset in a certain direction, but also conducive to controlling the overall size of the positioning mechanism 10 and avoiding the positioning mechanism 10 from occupying too much space.

[0070] In addition, as the number of centering blocks 121 increases, the number of directions for concentrically positioning the workpiece 300 will also increase, which is beneficial to further improve the positioning accuracy and prevent the workpiece 300 from deviating.

[0071] Alternatively, if Figure 2As shown, the number of the centering blocks 121 can be 6, and the 6 centering blocks 121 can be evenly spaced around the installation channel 114. This not only improves the positioning accuracy, but also helps to control the overall size of the positioning mechanism 10 and avoid the positioning mechanism 10 occupying too much space.

[0072] According to some other embodiments of the present invention, one end of the centering block 121 facing the installation channel 114 has a first arcuate surface 1211 , and the first arcuate surface 1211 is recessed in a direction away from the installation channel 114 .

[0073] Specifically, the first arcuate surface 1211 can be adapted to the shape of the outer peripheral surface of the workpiece, that is, when the positioning component 12 is in the first state, the curvature of the first arcuate surface 1211 can fit the outer peripheral surface of the workpiece to ensure positioning accuracy and avoid a gap between the centering block 121 and the workpiece, thereby avoiding deviation of the workpiece.

[0074] In some specific embodiments of the present utility model, the end of the centering block 121 away from the mounting channel 114 has a second arcuate surface 1212, and the transmission assembly 13 includes a transmission wheel 131, which is annular. A plurality of first guide surfaces 1311 arranged at intervals along the circumferential direction are provided on the inner circumferential surface of the transmission wheel 131, and the first guide surfaces 1311 are abutted against the second arcuate surface 1212. In the radial direction of the transmission wheel 131, the first guide surface 1311 is inclined toward the mounting channel 114, and a step 1312 is formed between two adjacent first guide surfaces 1311. The transmission wheel 131 is coaxially arranged with the mounting channel 114, and the transmission wheel 131 can rotate around its own axis to drive the multiple centering blocks 121 to move synchronously along the radial direction of the mounting channel 114.

[0075] Specifically, the transmission wheel 131 may be a hollow wheel-shaped structure. The inner circumference of the transmission wheel 131 may include a plurality of first guide surfaces 1311 , which may be arranged along the circumference of the transmission wheel 131 , and a step 1312 may be formed between two adjacent first guide surfaces 1311 .

[0076] In the circumferential direction of the transmission wheel 131, the first guide surface 1311 may have two ends, namely a first end and a second end. The distance between the first end of the first guide surface 1311 and the center of the transmission wheel 131 may be R1, and the distance between the second end of the first guide surface 1311 and the center of the transmission wheel 131 may be R2, where R1<R2. In the direction in which the first end of the first guide surface 1311 extends toward the second end, the distance between the first guide surface 1311 and the center of the transmission wheel 131 gradually increases, so that the first guide surface 1311 is inclined toward the installation channel 114.

[0077] like Fig. 9As shown, for the convenience of explanation, two adjacent first guide surfaces 1311 may be defined as a first surface and a second surface, and a step 1312 is formed between the second end of the first surface and the first end of the second surface.

[0078] During the state switching of the positioning assembly 12, the first guide surface 1311 and the second arc surface 1212 can always abut against each other. The transmission wheel 131 can be coaxially arranged with the installation channel 114, so that when the transmission wheel 131 rotates around its own axis, it can drive multiple centering blocks 121 to move synchronously.

[0079] like Figure 2 As shown, when the transmission assembly 13 is in the first state, the centering block 121 is close to the first end of the first guide surface 1311 or abuts against the first end of the first guide surface 1311. Figure 5 As shown, when the transmission assembly 13 is in the second state, the centering block 121 can be close to the second end of the first guide surface 1311 or abut against the second end of the first guide surface 1311 .

[0080] In this embodiment, by utilizing the cooperation between the first guide surface 1311 on the inner circumference of the transmission wheel 131 and the second curved surface 1212 on the centering block 121, the rotation of the transmission wheel 131 can be converted into linear motion of the centering block 121, and the centering block 121 can be driven synchronously, thereby achieving concentric positioning of the workpiece from multiple directions at the same time, which is beneficial to improving positioning accuracy.

[0081] According to some optional embodiments of the utility model, the positioning mechanism 10 also includes a plurality of first elastic members 14, and the plurality of first elastic members 14 are arranged along the circumference of the mounting channel 114, and each first elastic member 14 is retractable in the radial direction of the mounting channel 114, and one end of each first elastic member 14 close to the mounting channel 114 is connected to the mounting seat 11, and each centering block 121 is connected to the other end of at least one first elastic member 14 to press the centering block 121 against the second arc surface 1212.

[0082] Specifically, the first elastic member 14 is connected between the centering block 121 and the mounting seat 11, and the centering block 121 can be pressed against the workpiece by the first elastic member 14. Under the action of the first elastic member 14, the centering block 121 always abuts against the first guide surface 1311. Optionally, the first elastic member 14 may include a spring.

[0083] When the transmission assembly 13 is in the first state, the first elastic member 14 is in a compressed state, and the length of the first elastic member 14 may be S1. When the transmission assembly 13 is in the second state, the length of the first elastic member 14 may be S2, where S1<S2.

[0084] In the initial state, the input end is not driven by the external driving mechanism 30, and the positioning assembly 12 is in the first state. Then the driving mechanism 30 drives the transmission wheel 131 to rotate in the positive direction through the injection end, so that the centering block 121 moves in the direction away from the installation channel 114 and compresses the first elastic member 14. The workpiece is inserted into the installation channel 114, and then the driving mechanism 30 is released. The centering block 121 moves in the direction close to the installation channel 114 under the elastic force of the first elastic member 14 until it abuts against the workpiece, and the transmission wheel 131 rotates in the opposite direction, completing the concentric positioning of the workpiece.

[0085] In this embodiment, without interference from external structures, the first elastic member 14 can be used to stably and reliably maintain the workpiece in a concentrically positioned state, so as to facilitate subsequent processing of the workpiece.

[0086] According to some other embodiments of the utility model, each centering block 121 is provided with a stop pin 122, each stop pin 122 passes through the centering block 121 in the circumferential direction of the installation channel 114, and connecting seats 123 are respectively provided at both ends of the stop pin 122, and the connecting seat 123 is connected to the first elastic member 14.

[0087] Specifically, the centering block 121 may extend radially along the mounting channel 114, and the extending direction of the stop pin 122 on the centering block 121 may be perpendicular to the extending direction of the centering block 121. The stop pin 122 may penetrate the centering block 121, and both ends of the stop pin 122 protrude from the centering block 121.

[0088] A connection seat 123 for connecting the first elastic member 14 may be provided on each end of the stop pin 122. When the first elastic member 14 is a spring, a portion of the connection seat 123 may extend into the first elastic member 14, and an end of the first elastic member 14 away from the installation channel 114 may abut against the connection seat 123. A first elastic member 14 may be provided on both sides of the centering block 121, respectively, and the two first elastic members 14 may be provided in parallel with the centering block 121.

[0089] In some specific embodiments, a plurality of guide members may be provided on the mounting seat 11, and the plurality of guide members may be arranged along the circumference of the mounting channel 114. Each guide member may extend radially along the mounting channel 114 and be used to guide the centering block 121 to move radially along the mounting channel 114 to avoid displacement of the centering block 121.

[0090] Optionally, the guide member may be a guide channel 116, and the centering block 121, the first elastic member 14, the stop pin 122 and the connection seat 123 may be accommodated in the guide channel 116. The connection seat 123 may be slidably connected to the inner wall surface of the guide channel 116.

[0091] In some specific embodiments of the present utility model, a toggle portion is provided on the outer circumference of the transmission wheel 131, and the transmission assembly 13 further includes a toggle member 132, which is movable between a first position and a second position along a first direction, and a matching portion is provided on the toggle member 132, and the matching portion cooperates with the toggle portion to drive the transmission wheel 131 to rotate. When the toggle member 132 is in the first position, the positioning assembly 12 is in the first state. When the toggle member 132 is in the first position, the positioning assembly 12 is in the second state.

[0092] Thus, through the cooperation between the toggle member 132 and the toggle portion, the linear motion of the toggle member 132 can be converted into the rotational motion of the transmission wheel 131, so that the external driving mechanism 30 can control the synchronous movement of multiple centering blocks 121 by pushing the toggle member 132, which is beneficial to improve the positioning accuracy. In addition, the above structure has the advantages of simple structure and convenient driving.

[0093] According to some optional embodiments of the present invention, the transmission assembly 13 further includes a transmission rod 133 , which can perform linear motion, one end of the transmission rod 133 is connected to the toggle member 132 , and the other end of the transmission rod 133 forms an input end.

[0094] Specifically, the linear motion direction of the transmission rod 133 may coincide with the first direction or may intersect with the first direction, which is not limited here. The external driving mechanism 30 may drive the transmission rod 133 to move the toggle member 132 along the first direction to achieve state switching of the positioning assembly 12.

[0095] In this embodiment, the transmission rod 133 has a simple structure, is easy to manufacture, and is convenient to cooperate with the external driving mechanism 30 .

[0096] In some optional embodiments, a bushing 117 may be provided between the transmission rod 133 and the mounting seat 11 to reduce the friction between the transmission rod 133 and the mounting seat 11 .

[0097] According to some other embodiments of the present invention, the input end protrudes from the outer surface of the mounting seat 11. When the toggle member 132 is in the first position, the length of the input end protruding from the outer surface of the mounting seat 11 is L1. When the toggle member 132 is in the first position, the length of the input end protruding from the outer surface of the mounting seat 11 is L2, and L1<L2.

[0098] Therefore, the input end of the transmission rod 133 can always protrude from the mounting seat 11 to facilitate the external driving mechanism 30 to push the transmission rod 133. Through the transmission of the transmission rod 133, the toggle member 132 and the transmission wheel 131, the positioning assembly 12 switches from the first state to the second state.

[0099] In some specific embodiments of the present invention, the shifting portion includes a plurality of first teeth 1313 arranged circumferentially along the transmission wheel 131, the shifting member 132 includes a rack 1321, and the mating portion includes a plurality of second teeth 1323 arranged along the first direction, and the first teeth 1313 and the second teeth 1323 are meshed for transmission.

[0100] like Figure 2 and Figure 5 As shown, the transmission wheel 131 may be a gear, the toggle portion on the outer circumference of the transmission wheel 131 may be mainly composed of a plurality of first teeth 1313, and the matching portion on the toggle member 132 may be mainly composed of a plurality of second teeth 1323. The first teeth 1313 and the second teeth 1323 are meshed and transmitted, and the linear motion of the toggle member 132 may be converted into the rotational motion of the transmission wheel 131.

[0101] In this embodiment, the transmission between the shifting member 132 and the transmission wheel 131 is carried out by gear transmission, which has the advantages of high transmission accuracy, flexible spatial arrangement, reliable operation and long service life.

[0102] According to some optional embodiments of the present invention, the transmission rod 133 extends along the first direction and is movable along the first direction.

[0103] like Figures 1 to 7 As shown, the transmission rod 133 and the toggle member 132 extend in the same direction, and the transmission rod 133 and the toggle member 132 move in the same direction, which is beneficial to improving the reliability of the transmission mechanism.

[0104] According to some other embodiments of the utility model, the toggle portion includes a protrusion 1314 protruding radially outward along the transmission wheel 131, and a groove 1315 is provided at one end of the protrusion 1314 away from the mounting channel 114. The toggle member 132 includes a guide block 1322, and a guide groove is provided on the mounting seat 11, and the guide groove extends along a first direction. The guide block 1322 is movable along the guide groove, and the mating portion is a first driving column 1324, and the first driving column 1324 is inserted into the groove 1315.

[0105] like Fig.12 and Fig.13 As shown, a protrusion 1314 is provided on the outer circumference of the transmission wheel 131 . The protrusion 1314 protrudes toward the outside of the transmission wheel 131 . A groove 1315 may be provided on the protrusion 1314 .

[0106] The mounting seat 11 may be provided with a guide groove along the first direction, and the guide groove may guide and limit the movement of the guide block 1322 along the first direction. The guide block 1322 may be provided with a first driving column 1324, and the axis of the first driving column 1324 may be parallel to the axis of the mounting channel 114. The transmission wheel 131 may be limited in the mounting seat 11 to only rotate around its own axis.

[0107] In addition, the first guide column can be inserted into the groove 1315 , so that when the guide block 1322 moves along the guide groove, the first guide column can drive the transmission wheel 131 to rotate around its own axis by cooperating with the groove 1315 .

[0108] The groove 1315 can extend radially along the transmission wheel 131, that is, the line between the notch of the groove 1315 and the bottom surface of the groove 1315 can extend radially along the transmission wheel 131, so that the groove 1315 has a preset depth to avoid the first driving column 1324 from separating from the groove 1315 during transmission.

[0109] In this embodiment, the groove 1315 on the protrusion 1314 cooperates with the first driving column 1324, which has the advantages of flexible spatial arrangement and reliable operation. The structure of the groove 1315 and the first driving column 1324 is easy to process and manufacture, which is beneficial to reducing the production cost of the positioning mechanism 10.

[0110] In some specific embodiments of the utility model, the transmission rod 133 extends and is movable along the second direction, the second direction is respectively perpendicular to the first direction and the axial direction of the transmission wheel 131, and the end of the transmission rod 133 connected to the toggle member 132 has a second guide surface 1332, and the second guide surface 1332 is respectively inclined relative to the first direction and the second direction. A second driving column 1325 is provided on the toggle member 132, and the second driving column 1325 is arranged parallel to the first driving column 1324. The second guide surface 1332 abuts against the second driving column 1325 and drives the toggle member 132 to move along the first direction.

[0111] like Fig.12 and Fig.13 As shown, the movement direction of the transmission rod 133 and the movement direction of the toggle member 132 can be perpendicular to each other. By utilizing the second guide surface 1332 inclined at the end of the transmission member to cooperate with the second driving column 1325 on the toggle member 132, the linear motion of the transmission rod 133 along the second direction can be converted into the linear motion of the toggle member 132 along the first direction.

[0112] In addition, the axis of the second driving column 1325 and the axis of the first driving column 1324 may be parallel to each other. The second driving column 1325 and the first driving column 1324 may be spaced apart along the second direction.

[0113] In some specific embodiments, Fig.12 and Fig.13 The transmission rod 133 shown can be arranged on an external driving mechanism 30 , and the second driving column 1325 can be exposed from a hole on the surface of the mounting base 11 . The external mechanism can extend the transmission rod 133 into the hole to move the second driving column 1325 .

[0114] According to some optional embodiments of the utility model, the positioning mechanism 10 also includes a second elastic member 15, one end of the second elastic member 15 is connected to the toggle member 132, and the other end of the second elastic member 15 is connected to the mounting seat 11, and the second elastic member 15 is retractable in a first direction and is used to drive the toggle member 132 to move from the second position to the first position.

[0115] Therefore, when the external driving mechanism 30 releases the driving of the input end, the second elastic member 15 can reset the toggle member 132 .

[0116] like Figures 2 to 7 As shown, a mounting hole may be provided on the toggle member 132, a portion of the second elastic member 15 may be located in the mounting hole, and another portion of the second elastic member 15 may protrude from the toggle member 132. The second elastic member 15 may be located at an end of the toggle member 132 away from the transmission rod 133. There are two second elastic members 15, and the two second elastic members 15 may be spaced apart along the axial direction of the mounting channel 114, which is beneficial to improving the stability of the movement of the toggle member 132 during resetting, and preventing the toggle member 132 from being offset and affecting the positioning accuracy.

[0117] When the positioning assembly 12 is in the first state, Figure 3 and Figure 4 As shown in FIG. 1 , the portion of the second elastic member 15 protruding from the toggle member 132 is longer. When the positioning assembly 12 is in the second state, the portion of the second elastic member 15 protruding from the toggle member 132 is shorter, or as shown in FIG. Figure 6 and Figure 7 As shown, the second elastic member 15 is completely accommodated in the mounting hole of the toggle member 132 .

[0118] Optionally, the second elastic member 15 may include but is not limited to a spring.

[0119] According to some other embodiments of the utility model, the mounting base 11 includes a front cover plate 111, a rear cover plate 112 and a side cover plate 113. The rear cover plate 112 is covered on the front cover plate 111, and cooperates with the front cover plate 111 to define an installation space 115 suitable for accommodating the positioning assembly 12 and the transmission assembly 13. The installation channel 114 penetrates at least one of the front cover plate 111 and the rear cover plate 112 along the thickness direction of the front cover plate 111. The installation space 115 has an opening, and the opening is located at the ends of the front cover plate 111 and the rear cover plate 112. The side cover plate 113 is covered at the opening.

[0120] In other words, the mounting seat 11 of this embodiment can be mainly composed of a front cover plate 111, a rear cover plate 112 and a side cover plate 113. The front cover plate 111 can be covered on one side of the rear cover plate 112, and the thickness direction of the front cover plate 111, the thickness direction of the rear cover plate 112 and the axial direction of the mounting channel 114 coincide with each other. The mounting channel 114 can penetrate the front cover plate 111 and the rear cover plate 112 and form holes on the front cover plate 111 and the rear cover plate 112 respectively. The front cover plate 111 and the rear cover plate 112 can be detachably connected together by pins.

[0121] The front cover plate 111 and the rear cover plate 112 may cooperate to define an installation space 115, and the positioning assembly 12 and the transmission assembly 13 may be accommodated in the installation space 115. The installation channel 114 may pass through the installation space 115. In addition, one of the front cover plate 111 or the rear cover plate 112 may also be penetrated by the input end.

[0122] In addition, the front cover 111 can be covered on the rear cover 112 to form an opening at the end, and a part of the transmission assembly 13 can be exposed from the opening for easy observation. The side cover 113 can be covered on the opening to close the installation space 115.

[0123] In this embodiment, the front cover 111, the rear cover 112 and the side cover 113 cooperate to protect at least a portion of the positioning assembly 12 and the transmission assembly 13 inside the mounting base 11, so as to keep the interior clean and prevent external dust, stains, etc. from entering the mounting space 115 to damage the positioning assembly 12 and the transmission assembly 13 and affect the positioning accuracy.

[0124] In some optional embodiments, the positioning mechanism 10 further includes a centering wheel 124, on which the centering block 121, the first elastic member 14, the stop pin 122 and the connecting seat 123 can be mounted, and the mounting channel 114 penetrates the centering wheel 124 along the axial direction of the centering wheel 124, and the centering wheel 124 is coaxially arranged with the mounting channel 114. One end of the centering block 121 can protrude from the inner surface of the centering wheel 124, and the other end of the centering block 121 can protrude from the outer surface of the centering wheel 124.

[0125] like Fig.14 and Fig.15 As shown, the embodiment of the utility model further provides a conveying device 100, which comprises a positioning mechanism 10 and a conveying mechanism 20 according to any of the above embodiments. The conveying mechanism 20 is used to convey the positioning mechanism 10.

[0126] The conveying device 100 has a loading station and a processing station, and the conveying mechanism 20 is used to convey the positioning mechanism 10 from the loading station to the processing station.

[0127] In some optional embodiments, the processing station may be provided with a welding device, which can weld the collecting plate to the end of the battery cell positioned by the positioning mechanism 10 .

[0128] Since the positioning mechanism 10 according to the embodiment of the utility model has the above-mentioned technical effects, the conveying device 100 according to the embodiment of the utility model also has the corresponding technical effects, that is, a plurality of centering blocks 121 are arranged around the installation channel 114, and the transmission assembly 13 is used to drive the plurality of centering blocks 121 to clamp or release the workpiece along the radial direction of the installation channel 114, and automatic centering can be performed in multiple directions, thereby achieving concentric positioning of the workpiece. Compared with the traditional V-shaped pneumatic positioning jaws, the positioning mechanism 10 of the utility model can prevent the workpiece from being offset in one direction due to the problem of contact before and after during positioning, which is beneficial to improving the positioning accuracy, thereby improving the processing accuracy and the yield of the product.

[0129] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A positioning mechanism, characterized in that: include: a mounting seat, the mounting seat defining a mounting channel adapted to receive a workpiece; A positioning assembly, the positioning assembly comprising a plurality of centering blocks, wherein the plurality of centering blocks are arranged on the mounting seat along the circumference of the mounting channel; A transmission assembly, wherein the transmission assembly has an input end and an output end, wherein the output end is connected to the plurality of centering blocks and drives the plurality of centering blocks to move synchronously along the radial direction of the installation channel, so that the positioning assembly switches between the first state and the second state. When the positioning assembly is in the first state, the plurality of centering blocks respectively abut against the workpiece to position the workpiece. When the positioning assembly is in the second state, the plurality of centering blocks are respectively spaced apart from the workpiece to form gaps.

2. The positioning mechanism according to claim 1, characterized in that: The output end protrudes from the surface of the mounting seat.

3. The positioning mechanism according to claim 1, characterized in that: The number of the centering blocks is ≥4.

4. The positioning mechanism according to claim 1, characterized in that: The centering block has a first arcuate surface at one end facing the installation channel, and the first arcuate surface is concave in a direction away from the installation channel.

5. The positioning mechanism according to claim 1, characterized in that: The centering block has a second arc surface at one end away from the installation channel, and the transmission assembly includes: A transmission wheel, which is annular in shape, and has an inner circumferential surface provided with a plurality of first guide surfaces arranged at intervals along the circumferential direction, the first guide surfaces abutting against the second arcuate surfaces, and in the radial direction of the transmission wheel, the first guide surfaces are inclined toward the mounting channel, and a step is formed between two adjacent first guide surfaces, the transmission wheel is coaxially arranged with the mounting channel, and the transmission wheel can rotate around its own axis to drive the plurality of centering blocks to move synchronously along the radial direction of the mounting channel.

6. The positioning mechanism according to claim 5, characterized in that: Also includes: A plurality of first elastic members are arranged along the circumference of the mounting channel, each of the first elastic members is retractable in the radial direction of the mounting channel, each of the first elastic members is connected to the mounting seat at one end close to the mounting channel, and each of the centering blocks is connected to the other end of at least one of the first elastic members to press the centering block against the second arc surface.

7. The positioning mechanism according to claim 6, characterized in that: Each of the centering blocks is provided with a stop pin, and each of the stop pins penetrates the centering block in the circumferential direction of the installation channel. Both ends of the stop pin are provided with connecting seats, and the connecting seats are connected to the first elastic member.

8. The positioning mechanism according to claim 5, characterized in that: The outer circumference of the transmission wheel is provided with a toggle portion, and the transmission assembly further comprises: A toggle member, the toggle member is movable between a first position and a second position along a first direction, a matching portion is provided on the toggle member, and the matching portion cooperates with the toggle portion to drive the transmission wheel to rotate, When the toggle member is in the first position, the positioning assembly is in the first state; When the toggle member is in the first position, the positioning assembly is in the second state.

9. The positioning mechanism according to claim 8, characterized in that: The transmission assembly also includes: A transmission rod, wherein the transmission rod can perform linear motion, one end of the transmission rod is connected to the toggle member, and the other end of the transmission rod forms the input end.

10. The positioning mechanism according to claim 9, characterized in that: The input end protrudes from the outer surface of the mounting seat. When the toggle member is in the first position, the length of the input end protruding from the outer surface of the mounting seat is L1. When the toggle member is in the first position, the length of the input end protruding from the outer surface of the mounting seat is L2, and L1<L2.

11. The positioning mechanism according to claim 9, characterized in that: The toggle portion includes a plurality of first teeth arranged along the circumference of the transmission wheel, the toggle member includes a rack, and the matching portion includes a plurality of second teeth arranged along the first direction, and the first teeth mesh with the second teeth for transmission.

12. The positioning mechanism according to claim 11, characterized in that: The transmission rod extends along the first direction and is movable along the first direction.

13. The positioning mechanism according to claim 9, characterized in that: The toggle portion includes a protrusion protruding radially outward along the transmission wheel, a groove is provided at one end of the protrusion away from the mounting channel, the toggle member includes a guide block, a guide groove is provided on the mounting seat, the guide groove extends along the first direction, the guide block is movable along the guide groove, and the mating portion is a first driving column, which is inserted into the groove.

14. The positioning mechanism according to claim 13, characterized in that: The transmission rod extends along a second direction and is movable along the second direction, the second direction is respectively perpendicular to the first direction and the axial direction of the transmission wheel, the end of the transmission rod connected to the toggle member has a second guide surface, the second guide surface is respectively inclined relative to the first direction and the second direction, a second driving column is provided on the toggle member, the second driving column is parallel to the first driving column, the second guide surface abuts against the second driving column and drives the toggle member to move along the first direction.

15. The positioning mechanism according to any one of claims 8 to 14, characterized in that: Also includes: A second elastic member, one end of the second elastic member is connected to the toggle member, the other end of the second elastic member is connected to the mounting seat, the second elastic member is retractable in the first direction, and is used to drive the toggle member to move from the second position to the first position.

16. The positioning mechanism according to claim 1, characterized in that: The mounting base comprises: Front cover; a rear cover plate, the rear cover plate being disposed on the front cover plate and cooperating with the front cover plate to define an installation space suitable for accommodating the positioning assembly and the transmission assembly, the installation channel penetrating at least one of the front cover plate and the rear cover plate along the thickness direction of the front cover plate, the installation space having an opening, and the opening being located at the ends of the front cover plate and the rear cover plate; A side cover plate is arranged to cover the opening.

17. A conveying device, characterized in that: include: A positioning mechanism, wherein the positioning mechanism is the positioning mechanism according to any one of claims 1 to 16; A conveying mechanism is used to convey the positioning mechanism.

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