Manual assembly device for inner links

Abstract

The utility model discloses a manual assembly device for an inner chain link. The manual assembly device comprises a rack, a pressure-bearing flat plate, a pressure plate and a hydraulic machine, wherein the pressure plate is longitudinally connected right above the pressure-bearing flat plate in a sliding manner; a positioning part is arranged between the pressure plate and the pressure-bearing flat plate; the positioning part comprises two chain plate positioning frames and two semicircular inner cylinders; wherein the two chain plate positioning frames are connected with each other in a sliding manner; two semicircular outer cylinders are longitudinally arranged on one chain plate positioning frame; and the semicircular inner cylinder is detachably and coaxially arranged in the semicircular outer cylinder. The chain plate positioning frame and the semicircular inner cylinder realize accurate positioning of the positions of the chain plate and the sleeve, the operation space and the operation position are large, and steps with high precision requirements such as perforation are avoided; after the chain plate and the sleeve are installed on the positioning part, the positioning part is placed at the upper end of the pressure-bearing flat plate at will, compression joint can be carried out, accurate adjustment is not needed, the manual workload and the working difficulty are integrally reduced, and the working efficiency of assembly is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chain plate assembly, in particular to a manual assembly device for inner chain links. Background Art

[0002] The chain is a primary component of a chain hoist. Due to the high degree of customization required for hoists, the chains' often large size and weight, and the wide variety of lengths and sizes, chain assembly is often performed manually. Chain assembly involves the assembly of inner and outer links. The inner link assembly consists of three main steps: 1. Assembling the inner link plate and sleeve: Assemble the sleeve onto the inner link plate. Because the inner link plate and sleeve have an interference fit, some pressure may be required during assembly. A small pressure tool or hammering can be used to interference fit the sleeve into the inner link plate. 2. Installing the roller onto the sleeve: Slide the roller onto the assembled sleeve. Since they have a clearance fit, the roller should slide easily into the sleeve and roll freely. 3. Following the same procedures as in step 1, assemble another inner link plate onto the sleeve to complete the inner link unit.

[0003] Chinese patent publication number CN113305266B discloses a chain inner link assembly method with reduced process steps, relating to the field of chain transmission technology. The method comprises the following steps: 1. Using a chain assembly machine, a sleeve is pressed into the lower inner link plate; 2. Using the chain assembly machine, a roller is mounted on the sleeve; and 3. Using a position-limiting assembly device provided on the chain assembly machine, the upper inner link plate and sleeve are press-fitted and the upper inner link plate's flat surface is flush with the sleeve's top end. The position-limiting assembly device comprises a base plate, a fixing seat, guide pins, a guide sleeve, a guide groove, a spring, and a position-limiting mechanism.

[0004] In the prior art, the method used in the aforementioned patent solution is often employed, whereby a positioning rod is sequentially inserted through the inner link plate and sleeve for press-fitting. Since the positioning rod requires perforation, manual operation requires precise adjustment of the positions of the inner link plate and sleeve, as well as accurate insertion of the positioning rod, which consumes considerable time. This results in low assembly efficiency for the inner chain links. Furthermore, a single chain often has numerous inner link units, resulting in a high level of manual labor, significantly limiting chain production efficiency. Utility Model Content

[0005] In order to overcome the technical problem that in the prior art, during the manual assembly of inner chain links, a positioning rod is often used to accurately position the inner chain plate and the sleeve, and the positioning rod needs to be adjusted time-consumingly during the perforation process, thus resulting in low manual operation efficiency. One purpose of the utility model is to provide a manual assembly device for inner chain links. By providing a semicircular inner cylinder that is positioned against the outside of the sleeve and a chain plate positioning frame that is positioned against the outside of the chain plate, the chain plate positioning frame and the semicircular inner cylinder can be crimped by a hydraulic press when placed at any position on the pressure plate. There is no need for precise alignment requirements such as perforation, and there is no need to deliberately adjust the position of the chain plate positioning frame, thereby reducing manual workload and improving production efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a manual assembly device for inner chain links, comprising a frame, a pressure plate horizontally arranged at the lower part of the frame, a pressure plate longitudinally slidably connected to the upper part of the pressure plate, and a hydraulic press arranged at the upper part of the frame; the pressure plate is arranged on the movable end of the hydraulic press; a positioning part is placed between the pressure plate and the pressure plate; the positioning part includes two chain plate positioning frames for positioning the chain plates, and two semicircular inner cylinders for positioning the sleeves; wherein, the two chain plate positioning frames are slidably connected to each other and are arranged longitudinally linearly; two semicircular outer cylinders are longitudinally arranged on one of the chain plate positioning frames; the semicircular inner cylinder is detachably coaxially arranged in the semicircular outer cylinder; the thickness of the semicircular inner cylinder is equal to the thickness of the corresponding sleeve.

[0007] Furthermore, a concave cavity is provided at one end of the chain plate positioning frame away from the semicircular inner cylinder; the cross-sectional shape of the concave cavity is half of the cross-sectional shape of the chain plate.

[0008] Nearly half of the chain plate and the sleeve are exposed on the outside of the positioning part, which is convenient for observing the crimping position and making real-time adjustments to the movement of the hydraulic press according to the observed situation.

[0009] Furthermore, a baffle is provided on the chain plate positioning frame; the chain plate is confined between the concave cavity and the baffle.

[0010] Specifically, one end of the concave cavity away from the semicircular inner cylinder and one end of the baffle away from the semicircular inner cylinder are provided with chamfers.

[0011] The baffle enables the chain plate to have a unique positional relationship on the corresponding chain plate positioning frame, and the chamfer facilitates the installation of the chain plate in the corresponding chain plate positioning frame. The chain plate is firmly installed on the chain plate positioning frame to prevent the relative positional relationship between the chain plate positioning frame and the sleeve from changing during the crimping process.

[0012] Preferably, the depth of the concave cavity is smaller than the thickness of the chain plate. During the crimping process of the hydraulic press, the positioning portion does not contact the pressure-bearing plate and the pressure plate, thereby ensuring that the positioning portion has a long service life.

[0013] Furthermore, a connecting frame is provided in the middle of the lower ends of the two semicircular inner cylinders; a positioning plate is provided on the connecting frame; a positioning groove is provided on the chain plate positioning frame located below; and the positioning plate can be optionally provided in the positioning groove.

[0014] Specifically, the semicircular outer cylinder is arranged at the upper end of the chain plate positioning frame located below; two semicircular plates are provided at the lower end of the chain plate positioning frame located above; a longitudinal sliding groove is coaxially provided at the upper end of the semicircular outer cylinder; the semicircular plates are slidably connected in the corresponding longitudinal sliding grooves.

[0015] Specifically, a plurality of springs are provided in the longitudinal slide groove between the bottom end of the longitudinal slide groove and the lower end of the semicircular plate.

[0016] Optionally, the inner wall and outer wall of the semicircular inner cylinder are respectively provided with a plurality of magnets, and the magnets are used to magnetically attract the roller and the semicircular outer cylinder, which helps the preparation work before crimping, assists in positioning, and improves work efficiency.

[0017] Specifically, the minimum distance between the upper end and the lower end of the positioning portion is smaller than the height of the sleeve.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The chain plate positioning frame is against the outside of the chain plate, and the semicircular inner cylinder is against the outside of the sleeve, so that the chain plate and the sleeve are accurately positioned. The operating space and operating position are large, and there is no need for steps with high precision such as punching. In addition, after the chain plate and the sleeve are installed on the positioning part, the positioning part can be placed arbitrarily on the upper end of the pressure plate, and the hydraulic press can perform crimping without the need for precise adjustment of the placement position. This reduces the overall workload and work difficulty, and improves the assembly work efficiency.

[0020] 2. When the semicircular inner cylinder is located between the two chain plate positioning frames, the semicircular inner cylinder defines the relative position of the chain plate and the sleeve, thereby achieving accurate crimping of the lower chain plate and sleeve; after the semicircular inner cylinder is removed, the roller placed instead of the semicircular inner cylinder can crimp the upper chain plate and sleeve.

[0021] 3. The utility model has a simple and reliable structure, uses a minimum amount of parts and components to position the chain plate and the sleeve, and is easy to operate manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the front exploded structure of the positioning part of the utility model;

[0024] Figure 3 This is a schematic diagram of the exploded structure of the back side of the positioning part of the present invention;

[0025] Figure 4 This is a schematic diagram of the lower chain plate and sleeve during the crimping process of the present invention;

[0026] Figure 5 This is a schematic diagram of the utility model after the roller is installed and the upper chain plate and sleeve are pressed together.

[0027] In the figure: 1. frame; 11. pressure plate; 12. hydraulic press; 13. pressure plate; 21. chain plate positioning frame; 211. semicircular outer cylinder; 2111. longitudinal slide groove; 212. semicircular plate; 213. chamfer; 214. baffle; 215. positioning groove; 216. concave cavity; 22. semicircular inner cylinder; 2221. connecting frame; 222. positioning plate; 31. chain plate; 32. sleeve; 33. roller. DETAILED DESCRIPTION

[0028] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. In the description of this utility model, "several" means two or more, unless otherwise specifically defined.

[0031] In this utility model, unless otherwise specified or limited, terms such as "disposed" and "installed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection; direct connection, connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0032] See also Figure 1-Figure 5 A manual assembly device for inner chain links includes a frame 1, a pressure plate 11 horizontally arranged at the lower part of the frame 1, a hydraulic press 12 arranged at the upper part of the frame 1, and a pressure plate 13 arranged at the lower end of the moving end of the hydraulic press 12; a positioning part is detachably connected between the pressure plate 11 and the pressure plate 13.

[0033] The positioning part includes two chain plate positioning frames 21 for positioning the chain plate 31, and two semicircular inner cylinders 22 for positioning the sleeve 32; the two chain plate positioning frames 21 are arranged longitudinally linearly; the upper end of the chain plate positioning frame 21 located at the bottom is symmetrically provided with two longitudinally arranged semicircular outer cylinders 211; the upper end of the semicircular outer cylinder 211 is coaxially provided with a longitudinal sliding groove 2111; the lower end of the chain plate positioning frame 21 located at the top is provided with two semicircular plates 212; the semicircular plates 212 are slidably connected in the corresponding longitudinal sliding grooves 2111; the thickness of the semicircular inner cylinder 22 is equal to the thickness of the corresponding roller.

[0034] A plurality of springs are provided in the longitudinal slide groove 2111 between the bottom end of the longitudinal slide groove 2111 and the lower end of the semicircular plate 212. A plurality of magnets are provided on the inner and outer walls of the semicircular inner cylinder 22, respectively. The magnets attract the roller and the semicircular outer cylinder. The minimum distance between the upper and lower ends of the positioning portion is less than the height of the sleeve.

[0035] A concave cavity 216 is provided at one end of the chain plate positioning frame 21 away from the semicircular inner cylinder 22; the cross-sectional shape of the concave cavity 216 is half of the cross-sectional shape of the chain plate; a baffle 214 is provided on the chain plate positioning frame 21; the chain plate is confined between the concave cavity 216 and the baffle 214; a chamfer 213 is provided at one end of the concave cavity 216 away from the semicircular inner cylinder 22 and one end of the baffle 214 away from the semicircular inner cylinder 22; the depth of the concave cavity 216 is less than the thickness of the chain plate.

[0036] A connecting frame 2221 is provided in the middle of the lower ends of the two semicircular inner cylinders 22 ; a positioning plate 222 is provided on the connecting frame 2221 ; a positioning groove 215 is provided on the chain plate positioning frame 21 located below; the positioning plate 222 can be optionally arranged in the positioning groove 215 .

[0037] During use, the operator places a chain plate 31 on the upper end of the pressure plate 11, and then places the chain plate positioning frame 21 located below on the chain plate 31, and the chain plate 31 enters the concave cavity 216. Subsequently, the two semicircular inner cylinders 22 are placed into the semicircular outer cylinder 211, and at the same time, the two sleeves 32 are placed into the semicircular inner cylinders 22 respectively. The hydraulic press 12 is started, and the hydraulic press 12 is pressed down until it contacts the sleeve 32, and the sleeve 32 is driven downward until the sleeve 32 is pressed into the hydraulic press 12. Figure 4 shown.

[0038] After one crimping is completed, the hydraulic press 12 drives the pressure plate 13 back to its original position, removes the semicircular inner cylinder 22, and then puts the two rollers 33 on the sleeve 32 respectively, with the outer wall of the roller abutting against the inner wall of the semicircular outer cylinder 211. Finally, a chain plate 31 is placed in the concave cavity 216 of the upper chain plate positioning frame 21. The hydraulic press 12 is started again, and the hydraulic press 12 presses the upper chain plate 31 onto the sleeve 32 according to the same movement path as above. Figure 5 The figure shows the assembly process of an inner link.

[0039] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A manual assembly device for inner chain links, characterized in that: The machine comprises a frame, a pressure plate horizontally arranged at the lower part of the frame, a pressure plate longitudinally slidably connected to the upper part of the pressure plate, and a hydraulic press arranged at the upper part of the frame; the pressure plate is arranged on the movable end of the hydraulic press; a positioning part is placed between the pressure plate and the pressure plate; the positioning part comprises two chain plate positioning frames for positioning chain plates, and two semicircular inner cylinders for positioning sleeves; wherein, the two chain plate positioning frames are slidably connected to each other and are arranged longitudinally linearly; two semicircular outer cylinders are longitudinally arranged on one chain plate positioning frame; the semicircular inner cylinder is detachably coaxially arranged in the semicircular outer cylinder; the thickness of the semicircular inner cylinder is equal to the thickness of the corresponding sleeve.

2. The assembly device according to claim 1, wherein: A concave cavity is provided at one end of the chain plate positioning frame away from the semicircular inner cylinder; the cross-sectional shape of the concave cavity is half of the cross-sectional shape of the chain plate.

3. The assembly device according to claim 2, wherein: A baffle is provided on the chain plate positioning frame; the chain plate is confined between the concave cavity and the baffle.

4. The assembly device according to claim 3, wherein: An end of the concave cavity away from the semicircular inner cylinder and an end of the baffle away from the semicircular inner cylinder are provided with chamfers.

5. The assembly device according to any one of claims 2 to 4, characterized in that: The depth of the concave cavity is smaller than the thickness of the chain plate. During the crimping process of the hydraulic press, the positioning portion does not contact the pressure-bearing plate and the pressure plate, thereby ensuring that the positioning portion has a long service life.

6. The assembly device according to any one of claims 1 to 4, characterized in that: A connecting frame is provided in the middle of the lower ends of the two semicircular inner cylinders; a positioning plate is provided on the connecting frame; a positioning groove is provided on the chain plate positioning frame located below; the positioning plate can be optionally arranged in the positioning groove.

7. The assembly device according to any one of claims 1 to 4, characterized in that: The semicircular outer cylinder is arranged at the upper end of the chain plate positioning frame located below; two semicircular plates are arranged at the lower end of the chain plate positioning frame located above; a longitudinal sliding groove is coaxially arranged at the upper end of the semicircular outer cylinder; the semicircular plates are slidably connected in the corresponding longitudinal sliding grooves.

8. The assembly device according to claim 7, wherein: A plurality of springs are arranged in the longitudinal slide groove between the bottom end of the longitudinal slide groove and the lower end of the semicircular plate.

9. The assembly device according to any one of claims 1 to 4, characterized in that: The inner wall and outer wall of the semicircular inner cylinder are respectively provided with a plurality of magnets, and the magnets are used for magnetically attracting the roller and the semicircular outer cylinder.

10. The assembly device according to any one of claims 1 to 4, characterized in that: The minimum distance between the upper end and the lower end of the positioning portion is smaller than the height of the sleeve.

Images