Universal handling assembly and press-fitting mechanism and equidistant circulation assembly

Abstract

The utility model provides a universal handling assembly and press-fitting mechanism and an equidistant circulation assembly, which comprise a tool outer seat, a tool inner seat, a tool outer seat and a tool inner seat, wherein the tool outer seat is provided with mounting holes along the vertical direction; the pushing shaft sleeve is in clearance fit with the mounting hole, and a nesting hole is formed in the middle; the mandrel piece at least comprises a cylindrical part, a positioning column is convexly arranged in the middle of the upper end of the mandrel piece, and pre-limiting grooves are symmetrically formed in the two sides of the mandrel piece; the limiting piece is arranged in the tool outer seat; the elastic piece is arranged in the tool outer seat; the positioning structure is arranged on the end face of the tool outer base, located on the peripheral side of the mandrel piece and opposite to the limiting hole position of the inner bottom of the inner cover. Wherein at least part of the mandrel piece is exposed out of the end face of the tool outer base, the outer diameter of the mandrel piece is larger than or equal to the outer diameter of the rotating shaft end of the end portion of the handle, and the pre-limiting groove is matched with the limiting groove of the end portion of the handle in shape and size. The handle assembling tool is suitable for assembling handles of various different designs and sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling structures, in particular to a universal hand-held installation and press-installation mechanism and an equidistant circulation component. Background Art

[0002] The handle is an indispensable part of the door panel, which is designed to facilitate the user to manually open and close the door. The handle design on the current market shows a variety of forms, especially the handle and panel design have their own characteristics, while the core components such as the retaining spring, the edge limit block, the torsion spring and the gasket tend to be standardized.

[0003] like Figure 1 , 2 As shown, the handle in the prior art generally includes a handle, a sleeve, an inner cover (or a surface cover), a gasket, a torsion spring, an edge limit block and a retaining spring. The end of the handle has a cylindrical shaft end bent at 90 degrees. The middle of the shaft end is generally provided with a core shaft hole. A pair of limiting grooves are formed on both sides of the core shaft hole and along the radial direction of the shaft end. The side of the shaft end away from the handle is provided with a limiting ring groove distributed around it in a circumferential direction. The inner side of the retaining spring is clamped into the limiting ring groove so that the outer side of the retaining spring can be used to stop and limit other parts. A through hole is penetrated in the middle of the inner cover or the surface cover to match the clearance of the shaft end, and the inner bottom of the inner cover or the surface cover is located at one end of the through hole. A torsion spring limiting structure is provided on the side, and the first and second ends of the torsion spring respectively form a hook end limited by the torsion spring limiting structure and a clamping end limited in the limiting groove. The edge and corner limiting block is in the shape of a ring sheet, and has a pair of stop parts extending outward along its circumference and a pair of limiting ends provided on its inner annular surface and limited by the two limiting grooves. The two stop parts are placed on both sides of the torsion spring limiting structure so that the torsion spring limiting structure limits the circumferential rotation of the edge and corner limiting block. In addition, in order to facilitate the positioning of the inner cover or the surface cover and prevent the inner cover or the surface cover from twisting for easy assembly, the inner cover or the surface cover usually also has limiting holes.

[0004] The traditional assembly process usually involves manually placing the handle on a special positioning tool, then gradually adding intermediate components and finally installing the retaining spring. The limitation of this assembly mode is that each handle with different shapes requires a customized matching positioning tool, which makes the tooling equipment not universal and difficult to adapt to the changing handle models.

[0005] In view of this, exploring an efficient and flexible handle assembly solution has become an urgent need in the industry. There have been relevant studies in the prior art. For example, Chinese patent document CN109129272A discloses a fixture structure for assembling a handle lock. This design relies on the inner and outer cylinder structures, and uses the added sleeve and central rotating mandrel to construct a multifunctional assembly chamber. Precise grooves and holes are preset in the chamber to accurately guide the gasket, retaining ring (angle limit block), torsion spring, panel, sleeve and other components into place in sequence, and finally use the restoring force of the elastic element to ensure that all components are accurately embedded in the handle assembly position. The above solution simplifies the handle assembly process and significantly improves assembly efficiency and convenience.

[0006] Although the above solution has brought certain efficiency improvements, the following problems still exist:

[0007] 1. The limiting and moving design of the sleeve and the rotating mandrel is relatively complicated, which is easy to cause jamming during the assembly process, which has an adverse effect on the assembly accuracy and efficiency;

[0008] 2. The size and shape of the receiving holes and grooves in the assembly cavity are designed for parts of specific sizes, including the positioning area of ​​the panel boss and the rotating retaining ring, which limits its compatibility with handles of different sizes or design changes;

[0009] 3. Even if an improved fixture structure is used, the assembly process still requires the rotating mandrel to pass through the components one by one and then insert into the base, which increases the complexity of the operation.

[0010] In view of this, the inventor of the present invention specially designed a universal hand-operated installation and press-installation mechanism and an equidistant circulation component, and this case was thus created. Utility Model Content

[0011] In order to solve the above problems, one of the technical solutions of the utility model is as follows:

[0012] A universal type of manual installation, comprising:

[0013] The tooling outer seat is used as a positioning base for the tooling to be combined with other mounting surfaces, and a circular mounting hole is vertically penetrated through the tooling outer seat;

[0014] The push sleeve is cylindrical and has a clearance fit with the mounting hole, and a nesting hole with a circular cross section is vertically penetrated in the middle thereof;

[0015] The spindle member at least comprises a cylindrical portion which can be gap-matched with the nesting hole, a positioning column which can be engaged with the spindle hole at the end of the handle is protruded in the middle of the upper end, and a group of pre-limiting grooves distributed vertically are symmetrically arranged along the radial sides of the spindle member;

[0016] A limiter, arranged in the tooling outer seat, is used to limit the vertical sliding of the mandrel and the push sleeve so that the mandrel and the push sleeve form a lowest position and a highest position;

[0017] An elastic member is disposed in the tooling outer seat and is used to elastically contact the push sleeve so that the push sleeve has a tendency to maintain the lowest position and to elastically contact the mandrel member so that the mandrel member has a tendency to maintain the highest position;

[0018] A positioning structure is provided on the end surface of the tooling outer seat and is located on the peripheral side of the core shaft member, opposite to the limiting hole position at the inner bottom of the inner cover, and is used to position the inner cover and prevent the inner cover from twisting;

[0019] Among them, the core shaft is at least partially exposed from the end face of the tooling outer seat, the outer diameter of the core shaft is greater than or equal to the outer diameter of the rotating shaft end of the handle end, and the pre-limiting groove is adapted to the shape and size of the limiting groove at the handle end.

[0020] Preferably, a limiting surface is provided in the nesting hole, the elastic member is a first spring movably arranged between the bottom of the core shaft member and the limiting surface, the core shaft member is provided with a first limiting hole which passes horizontally through the core shaft member in a radial direction and is linear in a vertical direction, the nesting hole is provided with second limiting holes which pass through the mounting hole along the inner walls on both sides opposite to the radial direction, the second limiting hole is linearly parallel to the first limiting hole in the vertical direction, the limiting member is a rod-shaped connecting pin, the connecting pin passes through the push sleeve and the second limiting hole and the first limiting hole of the core shaft member in sequence so that the push sleeve and the core shaft member have a lowest position and a highest position which can be moved up and down.

[0021] Preferably, the bottom of the core shaft is concavely provided with a bottom groove for accommodating the first spring, or convexly provided with a positioning boss for the first spring to be inserted, or provided with a contact surface that can movably contact with the end of the first spring.

[0022] Preferably, the upper end surface of the tooling outer seat is provided with an inner cover sleeve seat centered on the mounting hole, the positioning structure is a columnar positioning rod protruding from the uppermost end of the inner cover sleeve seat, and the top of the inner cover sleeve seat forms a positioning portion that can adapt to the shape of the inner cover opening.

[0023] Preferably, the top of the inner cover sleeve is recessed to form a circular assembly groove concentric with the mounting hole, the lowest position of the push sleeve is not higher than the bottom of the assembly groove, and the inner cover sleeve is radially penetrated by an installation channel for facilitating the insertion of parts, the installation channel is connected to the assembly groove and its bottom extends below the bottom of the assembly groove.

[0024] Preferably, a torsion spring overlap structure is provided in the assembly groove, the torsion spring overlap structure is opposite to the torsion spring limiting structure at the inner bottom of the inner cover after positioning, and the torsion spring overlap structure is rod-shaped or block-shaped.

[0025] Preferably, the torsion spring lap structure is fixed in the assembly groove, or the torsion spring lap structure is movably arranged in the inner cover sleeve and the tooling outer seat in the vertical direction, and when the torsion spring lap structure is movably arranged, an outward-expanding limiting edge is formed at its end, and a second spring which is sleeved on the outside of the torsion spring lap structure is movably provided at the lower end of the limiting edge, and the torsion spring lap structure has a highest position which can be pressed down and retracted through the elastic support of the second spring.

[0026] In order to solve the above problems, the second technical solution of the utility model is as follows:

[0027] A handle pressing mechanism including a tooling, comprising:

[0028] A tooling bottom plate, on which the tooling is provided;

[0029] The pressing mechanism has a first output end that can be retracted vertically, and a flexible pressing block for flexibly pressing the handle is provided at the end of the first output end;

[0030] The lifting mechanism has a second output end that can be retracted vertically. The second output end is used to lift the tooling so that the parts in the tooling are transferred to the rotating shaft end of the handle.

[0031] In order to solve the above problems, the third technical solution of the utility model is as follows:

[0032] An isometric cycle assembly including a tooling, comprising:

[0033] A revolving surface, on which a number of toolings are provided;

[0034] The driving mechanism is used to drive the tooling on the rotating surface to cyclically transport it at equal intervals along a closed path.

[0035] Preferably, the rotating surface is disc-shaped, and a plurality of the toolings are arranged at equal intervals around the center of the rotating surface, so that the plurality of toolings are cyclically transported around the rotating surface along a circular path;

[0036] Alternatively, the rotating surface is enclosed by a plurality of rotating unit plates to form a closed rectangular plane in the horizontal or vertical direction, and a plurality of the toolings are arranged on the rotating unit plates in a one-to-one correspondence, so that the plurality of toolings are cyclically transmitted along the closed rectangular path in the horizontal or vertical direction.

[0037] The beneficial effects of the utility model are as follows:

[0038] Firstly, the utility model embeds the spindle member in the pushing shaft sleeve, uses elastic members and limiting members to make the spindle member and the pushing shaft sleeve form the highest position and the lowest position, arranges a positioning column which is engaged with the spindle hole at the end of the handle at the top of the spindle member, and symmetrically forms pre-limiting grooves which are opposite to the limiting grooves at the end of the handle on the outer wall of the spindle member on both sides of the positioning column, and forms a positioning structure which is opposite to the limiting hole position at the bottom of the inner cover at the top of the tooling outer seat, so that the tooling member to be installed on the handle can be The sleeve, inner cover, gasket, torsion spring, edge limit block and retaining spring on the shaft end are stacked in reverse from bottom to top on the circumferential side wall of the core shaft part. After the core shaft hole on the handle to be installed is aligned with the positioning column and inserted, the sleeve is pushed upward, and the sleeve, inner cover, gasket, torsion spring, edge limit block and retaining spring nested on the circumferential side wall of the core shaft part are smoothly transferred to the shaft end of the handle. The retaining spring at the bottom is assembled in the outermost limit ring groove at the shaft end to complete the assembly process of the handle.

[0039] Compared with the existing handle assembly tooling, this solution pre-stacks the parts to be assembled around the mandrel and then transfers these parts to the shaft end of the handle at one time by pushing the sleeve, eliminating the complex steps of installing one by one in traditional assembly, and significantly improving the assembly efficiency. In particular, there is no need for an additional step of inserting the rotating mandrel, which further simplifies the assembly process, and the interaction between the various parts is smooth, which fully avoids the hysteresis phenomenon caused by the complex mechanism setting during the handle assembly process, and fully improves the stability and assembly efficiency of the handle assembly;

[0040] In addition, the assembly area for standard parts such as sleeves, inner covers, gaskets, torsion springs, corner limit blocks and retaining springs has been transformed from the original dedicated accommodation design of specific sizes to a universal accommodation design that is nested according to the space between them. This design can also be used for other handles with slightly different sizes of parts, fully improving the versatility of the tooling.

[0041] In addition, the utility model also proposes a handle pressing mechanism including a tooling and an equidistant circulation component, which further improves the automation level of the assembly line. Through the combination of the rotary surface and the drive mechanism, the continuous circulation transmission of multiple tooling can be realized, which is suitable for efficient and automated assembly of handles in a large-scale production environment.

[0042] In summary, the utility model not only fully simplifies the assembly process of handles by streamlining the mechanism, but also improves the versatility of the tooling, making it suitable for the assembly of handles of various designs and sizes. It also combines the handle pressing mechanism and the equidistant circulation component including the tooling to achieve continuous cyclic transmission of multiple tooling and convenient pressing of handles, which is suitable for efficient and automated assembly of handles in large-scale production environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0044] in:

[0045] Figure 1 It is one of the exploded structural diagrams of the handle in the prior art;

[0046] Figure 2 This is the second schematic diagram of the explosion structure of the handle in the prior art;

[0047] Figure 3 It is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0048] Figure 4 It is a schematic diagram of the top view of the structure of the first embodiment of the utility model;

[0049] Figure 5 It is a cross-sectional structural schematic diagram of the first embodiment of the utility model;

[0050] Figure 6 It is a schematic diagram of a partial explosion structure highlighting the connection between the core shaft member and the push sleeve in the embodiment of the utility model;

[0051] Figure 7 This is a schematic diagram of the overall structure of the second embodiment of the utility model;

[0052] Figure 8 This is a schematic diagram of the overall structure of the third embodiment of the present utility model;

[0053] Fig. 9 It is a schematic diagram of the overall structure of the fourth embodiment of the utility model;

[0054] Fig.10 This is a schematic diagram of the overall structure of the fifth embodiment of the present utility model;

[0055] Fig.11 It is a schematic diagram of the exploded structure of the handle assembly in the utility model.

[0056] Description of labels:

[0057] 10. Handle; 11. Handle; 111. Rotating shaft end; 112. Mandrel hole; 113. Limiting groove; 114. Limiting ring groove; 12. Bushing; 13. Inner cover; 131. Through hole; 132. Torsion spring limiting structure; 133. Limiting hole position; 14. Gasket; 15. Torsion spring; 151. Hook end; 152. Clamping end; 16. Angular limiting block; 161. Stopper; 162. Limiting end; 17. Circlip; 20. Tooling outer seat; 21. Mounting hole; 22. Pin hole; 23. Reset hole; 24. Second spring; 30. Pushing bushing; 31. Nesting hole; 32. Second limiting hole; 33. Limiting surface; 40. Mandrel Parts; 41. Positioning column; 42. Pre-limiting groove; 43. First limiting hole; 44. Bottom groove; 50. Limiting member; 60. Elastic member; 70. Inner cover sleeve; 71. Positioning structure; 72. Assembly groove; 73. Installation channel; 74. Torsion spring overlap structure; 741. Limiting edge; 75. Sliding hole; 80. Support frame; 81. Tooling bottom plate; 82. Pressing mechanism; 83. Flexible pressure block; 84. Pushing mechanism; 90. Rotating surface; 91. Driving motor; 92. Transmission combination; 93. Divider; 94. Circulation station detection assembly; 95. Rotation unit plate; 96. Rectangular rotary channel; 961. Circulation channel; 97. Push cylinder. DETAILED DESCRIPTION

[0058] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0059] In the prior art, such as Figure 1 , 2As shown, the handle 10 generally includes a handle 11, a sleeve 12, an inner cover 13 (or a surface cover), a gasket 14, a torsion spring 15, an edge limit block 16 and a retaining spring 17. The position and number of the gasket 14 are different according to the type of the handle 10. The end of the handle 11 has a cylindrical shaft end 111 bent by 90 degrees. The middle of the shaft end 111 generally has a core shaft hole 112. Both sides of the core shaft hole 112 and a pair of U-shaped opening limiting grooves 113 are formed along the radial direction of the shaft end 111. The side of the shaft end 111 away from the handle 11 is provided with a limiting ring groove 114 distributed around it in the circumferential direction. The inner side of the retaining spring 17 is stuck in the limiting ring groove 114 so that the outer side of the retaining spring 17 can be used to stop and limit other parts. The middle of the inner cover 13 is penetrated with a through hole 111 that is clearance-matched with the shaft end 111. 31, and a torsion spring limiting structure 132 is provided at one side of the through hole 131 at the inner bottom of the inner cover 13, and the first and second ends of the torsion spring 15 respectively form a hook end 151 limited by the torsion spring limiting structure 132 and a clamping end 152 limited in the limiting groove 113, the edge limiting block 16 is in the shape of an annular sheet, and has a pair of stoppers 161 extending outward along its circumference and a pair of limiting ends 162 provided on its inner annular surface and limited by the two limiting grooves 113, the two stoppers 161 are placed on both sides of the torsion spring limiting structure 132, so that the torsion spring limiting structure 132 limits the circumferential rotation of the edge limiting block 16. In addition, in order to facilitate the positioning of the inner cover 13 and prevent the inner cover 13 from twisting for easy assembly, the inner cover 13 or the surface cover is usually also provided with a limiting hole 133. Embodiment 1

[0060] See also Figures 3 to 6 , is a universal hand-held device as the best embodiment of the utility model.

[0061] The tooling outer base 20 is included as a positioning basis for combining the tooling with other mounting surfaces. A mounting hole 21 with a circular cross-section is vertically penetrated through the tooling outer base 20. The shape of the tooling outer base 20 can be formed by stretching a variety of shapes, such as a three-dimensional structure formed by stretching a rectangle, a circle, an ellipse, or a rectangle with rounded corners and right-angle transitions. The mounting hole 21 is specifically opened in the overall stretching direction of the tooling outer base 20, preferably with the stretching center, so as to facilitate the setting and forming of an area for placing accessories such as the sleeve 12, the inner cover 13, the gasket 14, the torsion spring 15, the edge limit block 16 and the retaining spring 17 on the shaft end 111 of the handle 10. In this embodiment, the tooling outer base 20 is a block-shaped structure formed by stretching a rectangle with a rounded cross-section, and the mounting holes 21 are distributed along the vertical center axis of the tooling outer base 20.

[0062] The push sleeve 30 is also included. The push sleeve 30 is cylindrical and has a clearance fit with the mounting hole 21. A nested hole 31 with a circular cross-section is vertically penetrated through the middle. The external shape of the push sleeve 30 may include a cylindrical shape, a square rod shape or other shapes, among which a cylindrical external shape is preferred, so that the push sleeve 30 can slide along the mounting hole 21 more smoothly. The mounting hole 21 is correspondingly set to a circular hole shape that is adapted to the external shape of the push sleeve 30. In order to facilitate the push sleeve 30 to push the sleeve 12, the inner cover 13, the gasket 14, the torsion spring 15, the edge limit block 16 and the retaining spring 17 and other accessories, the length of the push sleeve 30 is greater than the extension length of the mounting hole 21, so that the lower end of the push sleeve 30 passes through the mounting hole 21, so as to facilitate the connection of other driving components and realize the automatic extension and retraction of the push sleeve 30.

[0063] The spindle member 40 also includes a spindle member 40, which includes at least a cylindrical portion that can be gap-matched with the nesting hole. The upper end of the spindle member is cylindrical, and the middle and lower ends are cylindrical or polygonal. In this embodiment, the lower end is cylindrical, and a positioning column 41 that can be engaged with the spindle hole 112 at the end of the handle 11 is convexly provided in the middle of its upper end. The spindle member 40 is symmetrically provided with a group of vertically distributed and U-shaped pre-limiting grooves 42 along its radial sides, and the openings of the two pre-limiting grooves 42 are far away from each other, wherein the positioning column 41 is a square column, so as to form a shape that is engaged with the spindle hole 112 at the end of the handle 11, so that the handle 11 is inserted into the positioning column 41 for fixation, and when the handle 11 is inserted, The limiting grooves 113 on both sides of the rotating shaft end 111 are opposite to the pre-limiting grooves 42 in position and are adapted to the size and shape, so that the torsion spring 15 and the edge limiting block 16 limited by the pre-limiting grooves 42 can be transferred to the rotating shaft end 111 of the handle 11 in the same posture and then limited by the limiting grooves 113. The process is as follows: the clamping end 152 of the torsion spring 15 and the limiting end 162 of the edge limiting block 16 follow the torsion spring 15 and the edge limiting block 16, and are smoothly pushed into the limiting groove 113 opposite to the pre-limiting groove 42 along the pre-limiting groove 42 under the push of the pushing sleeve 30, thereby realizing the convenient transfer and assembly of the torsion spring 15 and the edge limiting block 16.

[0064] In order to facilitate the smooth movement of the clamping end 152 of the torsion spring 15 and the limiting end 162 of the corner limiting block 16 from the pre-limiting groove 42 into the limiting groove 113 at the end of the handle 10, the size of the pre-limiting groove 42 can be set to be slightly smaller than the limiting groove 113.

[0065] In addition, in order to enable accessories such as the sleeve 12, inner cover 13 or surface cover, gasket 14, torsion spring 15, edge limit block 16 and retaining spring 17 to be smoothly transferred from the core shaft 40 to the shaft end 111 on the handle 11, the outer diameter of the core shaft 40 is set to be greater than or equal to the outer diameter of the shaft end 111. When the outer diameter of the core shaft 40 is equal to the outer diameter of the shaft end 111, parts such as the sleeve 12, inner cover 13 or surface cover can be smoothly transferred; when the outer diameter of the core shaft 40 is greater than the outer diameter of the shaft end 111, parts such as the sleeve 12, inner cover 13 or surface cover can be more smoothly transferred from the side of the core shaft 40 with a larger cross-section to the side of the shaft end 111 with a smaller cross-section, thereby achieving a further transfer effect. Therefore, in this embodiment, the outer diameter of the core shaft 40 is set to be slightly larger than the outer diameter of the shaft end 111.

[0066] The tool also includes a limiter 50 , which is disposed in the tooling outer base 20 and is used to limit the vertical sliding of the core shaft 40 and the push sleeve 30 so that the core shaft 40 and the push sleeve 30 form a lowest position and a highest position.

[0067] Specifically, the limiting function of the limiting member 50 is realized as follows:

[0068] The spindle member 40 is provided with a first limiting hole 43 which passes horizontally through it in the radial direction and is linear in the vertical direction. The nesting hole 31 is provided with second limiting holes 32 which pass through the mounting hole 21 along the inner walls on both sides opposite to the radial direction. The second limiting holes 32 are linearly parallel to and opposite to the first limiting holes 43 in the vertical direction. The limiting member 50 is a rod-shaped connecting pin, which passes through the push sleeve 30 and the second limiting hole 32 and the first limiting hole 43 of the spindle member 40 in sequence so that the push sleeve 30 and the spindle member 40 have a lowest position and a highest position for vertical movement. Specifically, a pin hole 22 which passes through the mounting hole 21 is provided between the two side walls of the tooling outer seat 20. The push sleeve 30 is inserted into the lower end of the mounting hole 21 of the tooling outer seat 20 from bottom to top, and the spindle member 40 is inserted into the upper end of the mounting hole 21 from top to bottom and nested in the nesting hole 31 of the push sleeve 30. The spindle member 40 is rotated. And push the sleeve 30, so that the first limit hole 43 and the second limit hole 32 are kept aligned in the vertical direction and the line connecting the two ends of the pin shaft hole 22 just passes through the first limit hole 43 and the second limit hole 32. At this time, one end of the pin shaft hole 22 is inserted into the connecting pin, so that the connecting pin is inserted into the pushing sleeve 30 and the first limit hole 43 and the second limit hole 32 of the core shaft part 40 in turn, and finally passes through the other end of the pin shaft hole 22. At this time, under the limitation of the limiting member 50, the distance that the core shaft part 40 can move up and down is maintained within the vertical extension distance of the first limit hole 43, and the distance that the pushing sleeve 30 can move up and down is maintained within the vertical extension distance of the second limit hole 32, thereby forming the lowest position and the highest position of the pushing sleeve 30 and the core shaft part 40 in the vertical direction. In this embodiment, when the core shaft part 40 is in the highest position, it protrudes from the upper end surface of the tooling outer seat 20.

[0069] It also includes an elastic member 60, which is arranged in the tooling outer seat 20 and is used to elastically contact the push sleeve 30 so that the push sleeve 30 has a tendency to maintain the lowest position and elastically contact the core shaft member 40 so that the core shaft member 40 has a tendency to maintain the highest position.

[0070] Specifically, the elastic member 60 is a first spring, which pushes the sleeve 30 and forms an annular limiting surface 33 at the bottom of the nesting hole 31. The bottom of the first spring movably contacts the limiting surface 33, and the top of the first spring movably contacts the bottom of the core shaft member 40. Therefore, the first spring can generate a downward elastic force on the sleeve 30 and an upward elastic force on the core shaft member 40 through the ends on both sides thereof. Through the cooperation of the first spring and the connecting pin, the core shaft member 40 is pushed upward and maintained at its highest position protruding from the tooling outer seat 20, and the sleeve 30 is pushed downward and maintained at its lowest position.

[0071] The arrangement of the elastic member 60, the limiting member, the first limiting hole 43 and the second limiting hole 32 allows a nested structure to be formed between the push sleeve 30 and the core shaft member 40, and an integrated elastic support structure to be formed relative to the outer seat 20 of the tooling. When the handle 10 is assembled, the handle 11 of the handle 10 is generally pressed down by external pressure, and the push sleeve 30 is generally pushed up by external pressure. Therefore, after the shaft end 111 is embedded in the positioning column 41, the elastic support structure formed between the core shaft member 40, the limiting member and the first spring allows the handle 11 to continue to be pressed down, thereby achieving elastic contact between the handle 11 and the tooling, and avoiding damage to the handle 11 or the tooling caused by hard pressure. In addition, by pushing the elastic support structure formed between the sleeve 30, the limiting member and the first spring, the push sleeve 30 can automatically reset after pushing the components into the shaft end 111 of the handle 11. The above structure makes the tooling more flexible and suitable for assembly of various types of handles 10.

[0072] It also includes a positioning structure 71, which is arranged on the end surface of the tooling outer seat 20 and is located on the circumferential side of the core shaft 40, opposite to the limiting hole position 133 at the bottom of the inner cover 13 or the surface cover, and is used to position the inner cover 13 or the surface cover and prevent the inner cover 13 or the surface cover from twisting.

[0073] Specifically, the upper end surface of the tooling outer seat 20 is provided with an inner cover sleeve seat 70 centered on the mounting hole 21, and the positioning structure 71 is a columnar positioning rod protruding from the uppermost end of the inner cover sleeve seat 70. The top of the inner cover sleeve seat 70 forms a positioning portion (not shown in the figure) that can adapt to the shape of the lower opening of the inner cover 13 or the face cover. In this embodiment, the inner cover sleeve seat 70 is cylindrical as a whole, so it can be suitable for the assembly of the handle 10 with a circular inner cover 13 or the face cover. The center of the inner cover 13 or the face cover has a through hole 131 that is clearance-matched with the core shaft member 40. When the inner cover 13 or the face cover penetrates the core shaft member 40, the limiting hole 133 on the inner cover 13 or the surface cover is aligned with the positioning rod for limiting, thereby limiting the inner cover 13 or the surface cover on the inner cover sleeve 70 to prevent it from twisting. The above operation is to make the torsion spring limiting structure 132 at the inner bottom of the inner cover 13 or the surface cover remain relative to the torsion spring lap structure 74, so that the hook end 151 of the torsion spring 15 is pushed up with the torsion spring 15, so that it can smoothly transition to the torsion spring limiting structure 132 at the inner bottom of the inner cover 13 or the surface cover, completing the assembly of the torsion spring 15 without the need for additional twisting assembly of the torsion spring 15.

[0074] Alternatively, the positioning structure can also be changed according to the corresponding structure of the inner cover 13 or the inner bottom of the surface cover. For example, if a protrusion or a groove is set at the inner bottom of the inner cover 13 or the surface cover, the positioning structure is correspondingly set as a groove or a protrusion, which is not limited here.

[0075] Preferably, Figure 5 As shown, in order to facilitate the installation and positioning of the first spring, the bottom of the core shaft member 40 is concavely provided with a bottom groove 44 for accommodating the first spring, or is convexly provided with a positioning boss for the first spring to be inserted, or is provided with a contact surface that can movably contact the end of the first spring. In this embodiment, a bottom groove 44 is specifically provided, and a positioning boss or contact surface that is convenient for positioning the first spring can also be selected, which is not limited here.

[0076] Preferably, Figure 3 , 4 As shown in , 5, the top of the inner cover sleeve 70 is concave to form a circular assembly groove 72 which is concentric with the mounting hole 21, and the lowest position of the push sleeve 30 is not higher than the bottom surface of the assembly groove 72. The inner cover sleeve 70 is provided with an installation channel 73 which is convenient for the insertion of parts along its radial direction. The installation channel 73 is connected with the assembly groove 72 and its bottom extends below the bottom surface of the assembly groove 72.

[0077] In this embodiment, the bottom of the installation channel 73 passes through the upper end surface of the tooling outer base 20. The installation channel 73 is provided to cooperate with the realization of automatic loading of components such as the sleeve 12, the inner cover 13 or the surface cover, the gasket 14, the torsion spring 15, the edge limit block 16 and the retaining spring 17 on the core shaft 40, and a certain space is reserved for a transfer device such as a robot to accurately place each component on the outer peripheral side of the core shaft 40.

[0078] Preferably, Figure 3 , 4 As shown in FIGS. 5 and 5 , a torsion spring lap structure 74 is provided in the assembly groove 72. The torsion spring lap structure 74 is opposite to the torsion spring limiting structure 132 at the inner bottom of the inner cover 13 or the surface cover after positioning. The torsion spring lap structure 74 is rod-shaped or block-shaped. The shape of the torsion spring lap structure 74 is set to facilitate the lap connection of the hook end 151 on the outer side of the torsion spring 15, so as to cooperate with the pre-limiting groove 42 to maintain the compressed state of the torsion spring 15, and to facilitate pushing the compressed torsion spring 15 into the inner cover 13 or the surface cover of the handle 10 to complete the integrated assembly of the torsion spring 15.

[0079] The cam 74 is provided with a plurality of cams 76a and 77b , and the cam 74b is provided with a plurality of cams 76c , and the cam 74b is provided with a plurality of cams 76b ... The hook end 151 of the compressed torsion spring 15 is overlapped on the side wall of the torsion spring overlap structure 74, and the clamping end 152 is clamped into the pre-limiting groove 42 of the core shaft member 40, so that the torsion spring 15 maintains a twisted and compressed state on the tooling, and the torsion spring limiting structure 132 on the inner cover 13 or the surface cover is opposite to the torsion spring overlap structure 74 in the assembly groove 72. When the handle 11 of the handle 10 continues to be pressed down, the torsion spring limiting structure 132 presses the torsion spring overlap structure 74 down to retract it into the sliding hole 75 and the reset hole 23, and cooperates with the upward push action of the sleeve 30 to smoothly transition the compressed torsion spring 15 to the inner cover 13 or the surface cover. At this time, the hook end 151 of the torsion spring 15 smoothly transitions to the torsion spring limiting structure 132, and the clamping end 152 of the torsion spring 15 transitions to the limiting groove 113 at the end of the handle 11.

[0080] In order to facilitate the smooth transition of the hook end 151 , the upper end surface of the torsion spring overlap structure 74 can be set to be slightly larger than the torsion spring limiting structure 132 .

[0081] In this embodiment, the torsion spring overlapping structure 74 is in the shape of a round rod. Embodiment 2

[0082] See also Figure 7, is a universal type of hand-held assembly as the second embodiment of the utility model. The difference from the first embodiment is that the torsion spring lap structure 74 is fixed in the assembly groove 72. In this embodiment, the torsion spring lap structure 74 is in the shape of a square, and the torsion spring limiting structure 132 is in the shape of a square with an arc surface at one end. Compared with the torsion spring limiting structure 132, the torsion spring lap structure 74 has two more corners, and the torsion spring 15 can be smoothly transferred to the torsion spring limiting structure 132 during the upward movement.

[0083] Among them, part of the inner cover 13 or the surface cover is limited by the opening depth and other reasons, and does not require a spring-loaded torsion spring lap structure 74. The torsion spring 15 can be smoothly moved upward by simply pushing the top of the sleeve 30. Therefore, the torsion spring lap structure 74 can also be fixed in the assembly groove 72.

[0084] In addition, in this embodiment, the tooling outer seat 20 is designed to be a square block, and the circumferential side corners are transitioned through right-angled surfaces. The torsion spring limiting structure 132 on the inner cover 13 or the surface cover is a block with a circular arc surface on the side wall, and the radius corresponding to the circular arc surface is slightly smaller than the torsion spring lap structure 74. Embodiment 3

[0085] See also Figure 8 , is a handle pressing mechanism including tooling as the third embodiment of the present utility model, comprising:

[0086] A tooling bottom plate 81, on which tooling is provided;

[0087] The pressing mechanism 82 has a first output end that can be retracted vertically, and a flexible pressing block 83 for flexibly pressing the handle 10 and the handle 11 is provided at the end of the first output end;

[0088] The lifting mechanism 84 has a second output end that can be retracted vertically. The second output end is used to lift the tooling so that the parts in the tooling are transferred to the rotating shaft end 111 of the handle 10.

[0089] Specifically, the tooling referred to in this embodiment is the tooling in the first embodiment, and for ease of implementation, it also includes a square frame-type support frame 80.

[0090] A tooling bottom plate 81 is disposed in the middle of the support frame 80 , and the tooling outer seat 20 of the tooling is installed on the upper end surface of the tooling bottom plate 81 to push the shaft sleeve 30 to pass through the lower end of the tooling bottom plate 81 .

[0091] The lifting mechanism 84 is a cylinder, a motor or other retractable mechanism, specifically a lifting cylinder in the present embodiment, the output end of the lifting cylinder is opposite to the central axis where the pushing sleeve 30 is located, and the end of the output end can be directly connected and fixed to the bottom of the pushing sleeve 30, or can be movably fixed, so that when the output end of the lifting mechanism 84 is extended, the pushing sleeve 30 is driven to rise, and the sleeve 12, inner cover 13 or surface cover, gasket 14, torsion spring 15, edge limit block 16 and retaining spring 17 and other parts sleeved on the outer wall of the core shaft 40 are pushed to smoothly transition to the rotating shaft end 111 of the handle 11.

[0092] The pressing mechanism 82 is a cylinder, a motor or other retractable mechanism, specifically a pressing cylinder in the present embodiment, and a flexible pressing block 83 is fixed to the output end of the pressing cylinder, so that when the handle 11 is inserted into the positioning column 41 at the upper end of the spindle member 40 through the spindle hole 112 on the rotating shaft end 111 at its end, the output end of the pressing mechanism 82 extends out, and the flexible pressing block 83 presses against the upper end surface of the handle 11 opposite to the rotating shaft end 111, so that it can be further stably pressed onto the spindle member 40. During the pushing process of the upper cylinder, the handle 11 is kept stable, which facilitates the stable assembly of parts such as the sleeve 12, the inner cover 13 or the surface cover, the gasket 14, the torsion spring 15, the edge limit block 16 and the retaining spring 17.

[0093] Among them, the flexible pressing block 83 is a rubber block or a silicone block, specifically a rubber block in this embodiment, and its shape can be columnar, block-shaped or other shapes that can easily adapt to the shape of the handle 11. The shapes of ordinary handles 11 are different according to their types. The flexible pressing block 83 can be adapted to different shapes of handles 11, and can adapt to the shapes of various types of handles 11, thereby realizing the press-fitting of handles 11 with different shapes, so that the present press-fitting mechanism can be suitable for the assembly of different types of handles 10. Embodiment 4

[0094] See also Fig. 9 , is an isometric circulation assembly including tooling as the fourth embodiment of the utility model, comprising:

[0095] A rotating surface 90, on which a plurality of toolings are provided;

[0096] The driving mechanism is used to drive the tooling on the rotating surface 90 to cyclically transport along a closed path.

[0097] The tooling in this embodiment is the tooling in the first embodiment.

[0098] In this embodiment, the rotating surface 90 is disc-shaped, and a plurality of toolings are arranged at equal intervals around the center of the rotating surface 90 , so that the plurality of toolings are cyclically transmitted around the rotating surface 90 along a circular path.

[0099] Specifically, the driving mechanism includes a driving motor 91, a transmission combination 92 and a divider 93. The transmission combination 92 is a sprocket chain or a synchronous belt. The driving motor 91 is connected to the divider 93 through the transmission combination 92. The divider 93 is connected to the rotating surface 90 for converting the transmission of the driving motor 91 and the transmission combination 92 into intermittent rotation of the rotating surface 90, such as a cam divider 93.

[0100] In order to make the intermittent rotation of the rotating surface 90 more precise, a circulation station detection component 94 is provided at the lower end of the rotating surface 90 and at the transmission connection position between the divider 93 and the rotating surface 90, which can realize the above function through photoelectric sensors, in-position sensors, etc.

[0101] The equidistant circulation assembly of this embodiment is suitable for manual assembly or automatic assembly process of the handle 10. Embodiment 5

[0102] See also Fig.10 , is an equidistant circulation component including tooling as the fifth embodiment of the utility model. The difference from the fourth embodiment is that the rotating surface 90 is surrounded by a plurality of rotating unit plates 95 to form a closed rectangle in the horizontal or vertical direction, and the tooling outer seats 20 of the plurality of tooling are arranged on the rotating unit plates 95 in a one-to-one correspondence, so that the plurality of tooling can be cyclically transmitted along the closed rectangular path in the horizontal or vertical direction.

[0103] Specifically, in the present embodiment, the equidistant circulation component further includes a planar rectangular rotary channel 96, in which a circulation channel 961 is formed for the rotary unit plate 95 to be circulated and transported along its rectangular path. A group of push cylinders 97 are respectively arranged at both ends of the circulation channel 961. One push cylinder 97 in each group is arranged on one side of the long side of the circulation channel 961, and is responsible for pushing the rotary unit plate 95 in front of it to be transported forward along the first side (i.e., the long side) of the circulation channel 961 by the spacing of one rotary unit plate 95. The other push cylinder 97 is arranged on one side of the short side of the circulation channel 961, and is responsible for pushing the rotary unit plate 95 in front of it to transition from one long side of the circulation channel 961 to the long side of the other side. In addition, the rotary unit plates 95 are continuously and densely laid on the circulation channel 961 and a gap of the rotary unit plates 95 is left. Thus, through two groups of push cylinders 97, the circulation transmission of a number of rotary unit plates 95 in the circulation channel 961 can be realized.

[0104] In addition, it can also be set to a vertical up and down circulation transmission form according to needs, which is not limited here.

[0105] In this embodiment, the tooling outer base 20 is disposed on the rotary unit plate 95 .

[0106] The equidistant circulation assembly of this embodiment is suitable for manual assembly or automatic assembly process of the handle 10.

[0107] In addition, the driving mechanism for driving the rotary unit plate 95 can also be realized by a ring guide rail or a belt transmission structure, which is not limited here.

[0108] The beneficial effects of the utility model are as follows:

[0109] First, the utility model embeds the spindle member 40 in the pushing shaft sleeve 30, uses the elastic member 60 and the limiting member 50 to make the spindle member 40 and the pushing shaft sleeve 30 form the highest position and the lowest position, and sets a positioning column 41 at the top of the spindle member 40 to fit with the spindle hole 112 at the end of the handle 11, and symmetrically forms pre-limiting grooves 42 on the outer wall of the spindle member 40 on both sides of the positioning column 41, which are opposite to the limiting groove 113 at the end of the handle 11, and forms a positioning structure 71 at the top of the tooling outer seat 20, which is opposite to the limiting hole position 133 at the bottom of the inner cover 13 or the face cover. Therefore, in the process of assembling the handle 10, the part to be installed on the rotating shaft end 111 of the handle 11 can be The sleeve 12, inner cover 13 or surface cover, gasket 14, torsion spring 15, edge limit block 16 and retaining spring 17 are reversely stacked on the peripheral side wall of the core shaft member 40 from bottom to top. After the core shaft hole 112 on the handle 11 to be installed with the positioning column 41 is inserted, the sleeve 30 is pushed upward, and the sleeve 12, inner cover 13 or surface cover, gasket 14, torsion spring 15, edge limit block 16 and retaining spring 17 embedded in the peripheral side wall of the core shaft member 40 are smoothly transferred to the rotating shaft end 111 of the handle 11, and the retaining spring 17 located at the bottom is assembled in the outermost limiting ring groove 114 of the rotating shaft end 111, completing the assembly process of the handle 10.

[0110] Compared with the existing assembly tooling for the handle 10, this solution pre-stacks the components to be assembled around the mandrel 40, and then transfers these components to the rotating shaft end 111 of the handle 11 at one time by pushing the sleeve 30, thereby eliminating the complicated steps of installing one by one in the traditional assembly, and significantly improving the assembly efficiency. In particular, no additional step of rotating the mandrel is required, which further simplifies the assembly process, and the mutual actions between the various components are smooth, which fully avoids the hysteresis phenomenon caused by the complex mechanism setting during the assembly process of the handle 10, and fully improves the stability and assembly efficiency of the handle 10 assembly;

[0111] In addition, the assembly area of ​​standard parts such as the shaft sleeve 12, the inner cover 13 or the surface cover, the gasket 14, the torsion spring 15, the edge limit block 16 and the retaining spring 17 is transformed from the original special accommodation design of specific size to a universal accommodation design for nesting according to the middle space, which is also applicable to other handles 10 with slightly different sizes of parts, thereby fully improving the versatility of the tooling;

[0112] In addition, the present invention also proposes a press-fitting mechanism for the handle 10 including a tool and an equidistant circulation assembly, which further improves the automation level of the assembly line. Through the combination of the rotary surface 90 and the drive mechanism, continuous circulation transmission of multiple tooling can be achieved, which is suitable for efficient and automated assembly of the handle 10 in a large-scale production environment.

[0113] In summary, the utility model not only fully simplifies the assembly process of the handle 10 by streamlining the mechanism, but also improves the versatility of the tooling, making it suitable for the assembly of handles 10 of various designs and sizes. It also combines the handle 10 pressing mechanism including the tooling and the equidistant circulation component to achieve continuous cyclic transmission of multiple tooling and convenient pressing of the handle 10, which is suitable for efficient and automated assembly operations of the handle 10 in a large-scale production environment.

[0114] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A universal type of manual assembly, characterized in that: include: A tooling outer seat (20) serving as a positioning base for combining the tooling with other mounting surfaces, wherein a circular mounting hole (21) is vertically penetrated through the tooling outer seat (20); The push sleeve (30) is cylindrical and has a clearance fit with the mounting hole (21), and a nesting hole (31) with a circular cross section is vertically penetrated through the middle thereof; The spindle member (40) comprises at least a cylindrical portion which can be clearance-matched with the nesting hole (31), a positioning column (41) which can be engaged with the spindle hole (112) at the end of the handle (11) is protruded from the middle of the upper end thereof, and the spindle member (40) is symmetrically provided with a group of pre-limiting grooves (42) distributed in the vertical direction along two sides of the radial direction thereof; A limiting member (50) is disposed in the tooling outer seat (20) and is used to limit the vertical sliding of the core shaft member (40) and the pushing shaft sleeve (30) so that the core shaft member (40) and the pushing shaft sleeve (30) form a lowest position and a highest position; An elastic member (60) is disposed in the tooling outer seat (20) and is used to elastically contact the push sleeve (30) so that the push sleeve (30) has a tendency to maintain a lowest position and to elastically contact the core shaft member (40) so that the core shaft member (40) has a tendency to maintain a highest position; The spindle member (40) is at least partially exposed from the end surface of the tooling outer seat (20), the outer diameter of the spindle member (40) is greater than or equal to the outer diameter of the rotating shaft end (111) at the end of the handle (11), and the pre-limiting groove (42) is compatible with the limiting groove (113) at the end of the handle (11) in shape and size.

2. A universal hand-held device according to claim 1, characterized in that: A limiting surface (33) is provided in the nesting hole (31); the elastic member (60) is a first spring movably arranged between the bottom of the core shaft member (40) and the limiting surface (33); the core shaft member (40) is provided with a first limiting hole (43) which is horizontally penetrated along its radial direction and linear in the vertical direction; the nesting hole (31) is provided with second limiting holes (32) which penetrate to the mounting hole (21) along the inner walls on both sides opposite to each other in the radial direction; the second limiting hole (32) is linearly parallel to and opposite to the first limiting hole (43) in the vertical direction; the limiting member (50) is a rod-shaped connecting pin, which passes through the second limiting hole (32) and the first limiting hole (43) of the pushing sleeve (30) and the core shaft member (40) in sequence so that the pushing sleeve (30) and the core shaft member (40) have a lowest position and a highest position for upward and downward movement.

3. A universal hand-held device according to claim 2, characterized in that: The bottom of the core shaft member (40) is concavely provided with a bottom groove (44) for accommodating the first spring, or convexly provided with a positioning boss for the first spring to be inserted, or provided with a contact surface that can movably contact the end of the first spring.

4. A universal hand-held device according to claim 1, characterized in that: It also includes a positioning structure (71), which is arranged on the end surface of the tooling outer seat (20) and is located on the circumference of the core shaft member (40), opposite to the limiting hole position (133) at the bottom of the inner cover (13) or the surface cover, and is used to position the inner cover (13) or the surface cover and prevent the inner cover (13) or the surface cover from twisting; The upper end surface of the tooling outer seat (20) is provided with an inner cover seat (70) centered on the mounting hole (21), the positioning structure (71) is provided at the upper end of the inner cover seat, and the top of the inner cover seat (70) forms a positioning portion that can adapt to the opening shape of the inner cover (13).

5. A universal hand-held device according to claim 4, characterized in that: The top of the inner cover sleeve (70) is concave to form a circular assembly groove (72) concentric with the mounting hole (21); the lowest position of the push shaft sleeve (30) is not higher than the bottom surface of the assembly groove (72); the inner cover sleeve (70) is provided with an installation channel (73) penetrating along its radial direction for facilitating the insertion of parts; the installation channel (73) is communicated with the assembly groove (72) and its bottom extends below the bottom surface of the assembly groove (72).

6. A universal hand-held device according to claim 5, characterized in that: A torsion spring overlap structure (74) is provided in the assembly groove (72), the torsion spring overlap structure (74) being opposite to the torsion spring limiting structure (132) at the bottom of the positioned inner cover (13), and the torsion spring overlap structure (74) is rod-shaped or block-shaped.

7. A universal hand-held device according to claim 6, characterized in that: The torsion spring lap joint structure (74) is fixed in the assembly groove (72), or the torsion spring lap joint structure (74) is movably arranged in the inner cover sleeve (70) and the tooling outer seat (20) in the vertical direction, and when the torsion spring lap joint structure (74) is movably arranged, an outwardly expanded limiting edge (741) is formed at its end, and a second spring (24) sleeved on the outside of the torsion spring lap joint structure (74) is movably arranged at the lower end of the limiting edge (741), so that the torsion spring lap joint structure (74) has a highest position that can be pressed downward and retracted through the elastic support of the second spring (24).

8. A handle press-fitting mechanism, comprising a universal handle press-fitting mechanism as claimed in claim 1, characterized in that: Also includes: A tool base plate (81) on which the tool as claimed in claim 1 is provided; The pressing mechanism (82) has a first output end that can be retracted vertically, and a flexible pressing block (83) for flexibly pressing the handle (11) of the handle (10) is provided at the end of the first output end; The lifting mechanism (84) has a second output end that can be retracted vertically, and the second output end is used to lift the tooling, so that the parts in the tooling are transferred to the rotating shaft end (111) of the handle (10).

9. An equidistant circulation assembly, comprising a universal handle assembly as claimed in claim 1, characterized in that: Also includes: A revolving surface (90) on which a plurality of toolings according to claim 1 are provided; The driving mechanism is used to drive the tooling on the rotary surface (90) to be cyclically transmitted along a closed path at equal intervals.

10. The equidistant circulation assembly according to claim 9, characterized in that: The rotating surface (90) is disc-shaped, and a plurality of the toolings are arranged at equal intervals around the center of the rotating surface (90), so that the plurality of toolings are cyclically transported along a circular path around the rotating surface (90); Alternatively, the rotating surface (90) is enclosed by a plurality of rotating unit plates (95) to form a closed rectangle in the horizontal or vertical direction, and the plurality of toolings are arranged on the rotating unit plates (95) in a one-to-one correspondence, so that the plurality of toolings are cyclically transmitted along the closed rectangular path in the horizontal or vertical direction.

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