Chain piece missing mistake proofing device
By designing a chain missing piece anti-error device and using the cooperation of probes and detection pins to detect the presence of external chain pieces during the riveting process, the problem of chain missing pieces is solved and the riveting efficiency and assembly quality are improved.
Patent Information
- Application Number
- CN202421572098.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-07-04
AI Technical Summary
During the riveting stage, the outer chain links of the chain are prone to untimely or stuck material removal, resulting in missing links and inability to flow into the next process normally.
A chain missing piece error prevention device was designed, which included an upper rivet head assembly block, a lower rivet head assembly block, a probe, a detection pin, a spring and a laser probe. The laser probe was connected to the PLC controller signal. The probe and the detection pin cooperated to detect the presence of the outer chain piece during the riveting process, thus avoiding the misjudgment of missing pieces.
The working efficiency of the rivet head is improved, the inflow rate of defective products due to missing pieces is reduced, and the assembly quality is ensured.
Smart Images
Figure CN223338295U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of chain cover riveting machines, and specifically relates to a chain missing piece anti-error device. Background Art
[0002] Chains are commonly used components in the mechanical field, often used for conveying and transmission. They usually include inner links, and two adjacent inner links are connected by two outer links. The outer links are connected to the inner links by pins, which are usually riveted. During the chain assembly process, the inner links are assembled first, and then the inner links are connected in sequence through the outer links and pins. Currently, the automatic assembly of pins and outer links can be achieved through chain cover riveting machines. However, during the riveting head stage of the chain, the outer links are not dropped in time or are stuck, resulting in missing links (missing outer links) and the chain cannot flow normally into the next process. Utility Model Content
[0003] In response to the problems of the prior art, the present invention discloses a chain missing piece anti-error device, which can effectively detect the phenomenon of chain missing pieces when riveting.
[0004] To achieve the above purpose, the new technical solution is:
[0005] A chain missing piece error prevention device comprises an upper rivet head assembly block, a lower rivet head assembly block, a probe, a detection pin, a spring, and a laser probe. The upper rivet head assembly block and the lower rivet head assembly block are fixedly connected by a first bolt. A first mounting hole is provided in the upper part of the upper rivet head assembly block along the horizontal direction. A laser probe is installed on one side of the first mounting hole. The laser probe is connected to the PLC controller signal of the cover riveting machine through a wire. The upper part of the upper rivet head assembly block is connected to the working end of the cover riveting machine. A second mounting hole is provided in the middle part of the first mounting hole along the vertical direction downward to penetrate the lower rivet head assembly block. The lower part of the second mounting hole is expanded to form a mounting groove for mounting the rivet head block. The detection pin and the probe are stacked up and mounted in the second mounting hole. The rivet head block is fixedly mounted in the mounting groove. The probe can slide through the bottom end of the rivet head block and partially expose its head. The second mounting hole is located at the lower part of the upper rivet head assembly block and is expanded to form a spring mounting hole. The spring is sleeved outside the detection pin. In the initial state, the tail of the detection pin does not enter the first mounting hole. When the bottom end of the probe is subjected to the resistance of the outer chain piece, the probe pushes the detection pin upward to overcome the elastic force of the spring and allow the tail of the detection pin to enter the first mounting hole.
[0006] Preferably, a first threaded hole is provided at the bottom of the upper rivet head assembly block and on both sides of the second mounting hole in the longitudinal direction, and a through hole is provided on the lower rivet head assembly block opposite to the first threaded hole, which passes through the upper and lower end surfaces. The upper rivet head assembly block and the lower rivet head assembly block are fixedly connected by a first bolt that passes through the through hole and is screwed to the first threaded hole.
[0007] Preferably, a positioning groove is provided at the bottom end of the upper rivet head assembly block, and a positioning block is provided at the top end of the lower rivet head assembly block, and the positioning block is used in conjunction with the positioning groove.
[0008] Preferably, the positioning groove and the positioning block are both cylindrical, and second threaded holes penetrating the mounting groove are respectively provided on both sides of the lower rivet head assembly block. The rivet head block is spliced by a first rivet head block and a second rivet head block, and the first rivet head block and the second rivet head block are respectively fixedly connected to the mounting groove by second bolts passing through the second threaded holes and screwed to the second threaded holes.
[0009] Preferably, the detection nail head is provided with a first protrusion structure, the probe head is provided with a second protrusion structure, the lower rivet head assembly block is located at the top and at the second mounting hole by expanding the diameter of the second mounting hole wall to form a limiting groove, and the heads of the first protrusion structure and the second protrusion structure are abutted against each other and located in the limiting groove.
[0010] Preferably, the upper end of the spring is connected to the top wall of the spring mounting hole, and the lower end of the spring is connected to the inner surface of the first bump structure. When the probe is lifted, the first bump structure is loosely fitted with the inner wall of the spring mounting hole.
[0011] Preferably, the first rivet head block and the second rivet head block have the same structure, both of which are cubic structures. The inner and outer ends of the cubic structure are symmetrically provided with semicircular grooves along the longitudinal direction. When the first rivet head block and the second rivet head block are closed, the two semicircular grooves are for the probe to pass through and slide with the probe.
[0012] Preferably, a dovetail groove passing through the front and rear ends is provided at the top of the upper rivet head assembly block, and the two groove walls of the dovetail groove are respectively provided with a third threaded hole passing through the side surface of the upper rivet head assembly block, and a rectangular groove is provided on the outer surface of the front and rear ends of the upper rivet head assembly block and below the dovetail groove.
[0013] The beneficial effects of the new chain missing piece anti-error device are:
[0014] (1) This new type improves the working efficiency of the rivet head and avoids the tedious error correction procedures caused by the missing piece chain entering the next process.
[0015] (2) The new method reduces the error rate of defective products with missing rivet heads flowing into the next process, thereby improving the assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of the new model.
[0017] Figure 2 This is a schematic diagram of the explosion structure of this new type.
[0018] Figure 3This is a front view structural diagram of the new upper rivet head assembly block.
[0019] Figure 4 It is a structural schematic diagram of the first rivet head block or the second rivet head block.
[0020] 1. Upper rivet head assembly block; 2. Lower rivet head assembly block; 3. Dovetail groove; 4. Third threaded hole; 5. First mounting hole; 6. Spring; 7. Detection pin and probe assembly; 71. Detection pin; 711. First bump structure; 72. Probe; 721. Second bump structure; 73. The first bump structure and the second bump structure abut against each other at the head portion here; 8. Second threaded hole; 9. Rivet head block; 91. First rivet head block; 92. Second rivet head block; 93. Semicircular groove; 10. Mounting groove; 11. Spring mounting hole; 12. Limiting groove; 13. Rectangular groove; 14. Through hole; 15. First threaded hole; 16. Positioning block. DETAILED DESCRIPTION
[0021] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
[0022] The following embodiments may be understood as individually expressing a part of the local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.
[0023] Example 1
[0024] A chain missing piece anti-error device, such as Figure 1-4As shown, it includes an upper rivet head assembly block 1, a lower rivet head assembly block 2, a probe 72, a detection pin 71, a spring 6, and a laser probe. The upper rivet head assembly block 1 is fixedly connected to the lower rivet head assembly block 2 by a first bolt. A first mounting hole 5 is provided in the upper part of the upper rivet head assembly block 1 along the horizontal direction. A laser probe is installed on one side of the first mounting hole 5. The laser probe is connected to the PLC controller signal of the cover riveting machine through a wire. The upper part of the upper rivet head assembly block 1 is connected to the working end of the cover riveting machine. The middle part of the first mounting hole 5 is provided with a second mounting hole that penetrates the lower rivet head assembly block 2 along the longitudinal direction downward. The lower part of the second mounting hole is formed by expanding the diameter to mount the rivet head. The mounting slot 10 of the block 9, the detection pin 71 and the probe 72 are stacked up and installed in the second mounting hole, the rivet head block 9 is fixedly installed in the mounting slot 10, and the probe 72 can slide through the bottom end of the rivet head block 9 and partially expose its head. The second mounting hole is located at the lower part of the upper rivet head assembly block 1 and is formed by expanding the diameter to form a spring mounting hole 11 for installing the spring 6. The spring 6 is sleeved on the outside of the detection pin 71. In the initial state, the tail (i.e., the upper end) of the detection pin 71 does not enter the first mounting hole 5. When the bottom end of the probe 72 is subjected to the resistance of the outer chain piece, the probe 72 pushes the detection pin 71 upward to overcome the elastic force of the spring 6 and allow the tail of the detection pin 71 to enter the first mounting hole 5.
[0025] Example 2
[0026] like Figure 2 As shown, the bottom of the upper rivet head assembly block 1 and on both sides of the second mounting hole are respectively provided with first threaded holes 15 along the longitudinal direction, and the lower rivet head assembly block 2 opposite to the first threaded holes 15 is provided with through holes 14 passing through the upper and lower end surfaces. The upper rivet head assembly block 1 and the lower rivet head assembly block 2 are fixedly connected by a first bolt that passes through the through hole 14 and is screwed to the first threaded hole 15.
[0027] like Figure 2 As shown, a positioning groove is provided at the bottom end of the upper rivet head assembly block 1, and a positioning block 16 is provided at the top end of the lower rivet head assembly block 2. The positioning block 16 is used in conjunction with the positioning groove.
[0028] Example 3
[0029] like Figure 1 、 2 As shown in , 4, the positioning groove and the positioning block 16 are both cylindrical, and the lower rivet head assembly block 2 is provided with a second threaded hole 8 passing through the mounting groove 10 on both sides. The rivet head block 9 is spliced by the first rivet head block 91 and the second rivet head block 92. The first rivet head block 91 and the second rivet head block 92 are fixedly connected to the mounting groove 10 by a second bolt passing through the second threaded hole 8 and screwed to the second threaded hole 8.
[0030] Example 4
[0031] like Figure 1 、 2 As shown, the head of the detection pin 71 is provided with a first protrusion structure 711, and the head of the probe 72 is provided with a second protrusion structure 721. The top of the lower rivet head assembly block 2 is located at the second mounting hole by expanding the diameter of the second mounting hole wall to form a limiting groove 12. The heads of the first protrusion structure 711 and the second protrusion structure 721 are abutted against each other and are located in the limiting groove 12.
[0032] Example 5
[0033] like Figure 1 As shown, the upper end of the spring 6 is connected to the top wall of the spring mounting hole 11, and the lower end of the spring 6 is connected to the inner surface of the first protrusion structure 711. The first protrusion structure 711 is loosely matched with the inner wall of the spring mounting hole 11 when the probe 72 is lifted.
[0034] Example 6
[0035] like Figure 1 、 4 As shown, the first and second rivet head blocks 91 and 92 have identical cubic structures. Semicircular grooves 93 are symmetrically provided longitudinally at the inner and outer ends of the cubic structures. When the first and second rivet head blocks 91 and 92 are closed, the two semicircular grooves 93 allow the probe to pass through and slide with the probe. This design allows for the corresponding first or second rivet head block to be flipped over if one semicircular groove wears out, allowing the opposite semicircular groove to be used.
[0036] Example 7
[0037] like Figure 1 、 3 As shown, a dovetail groove 3 is provided at the top of the upper rivet head assembly block 1, which passes through the front and rear ends. The two groove walls of the dovetail groove are respectively provided with a third threaded hole 4 that passes through the side surface of the upper rivet head assembly block 1. A rectangular groove 13 is provided on the outer surface of the front and rear ends of the upper rivet head assembly block 1 and below the dovetail groove.
[0038] In this embodiment, the connection method between the upper portion of the upper rivet head assembly block and the cover riveting machine is determined by the mechanical structure of the cover riveting machine. Those skilled in the art can configure the relevant connection structure on the upper rivet head assembly block based on the different mechanical structures of different types of cover riveting machines. In this embodiment, the working end of the cover riveting machine (the output end of the lower cover riveting action) is equipped with a trapezoidal guide rail. During use, the trapezoidal guide rail is inserted through the dovetail groove. The dovetail groove and the trapezoidal guide rail are fixed relative to each other using a third bolt inserted through a third threaded hole. The working end is then driven up and down by the trapezoidal guide rail. To prevent the upper rivet head assembly block from sliding relative to the trapezoidal guide rail, two limit blocks are also provided on the working end. Two limit blocks are connected to the working end and respectively engage within rectangular grooves on either side, effectively preventing relative sliding between the upper rivet head assembly block and the trapezoidal guide rail.
[0039] The working principle of this new model:
[0040] A laser probe is installed in the first mounting hole, and the laser passes through the first mounting hole. When riveting, the probe and the rivet head block fall down at the same time to perform the riveting operation. At this time, under the action of the spring force, the detection pin and the probe are pressed to the extreme position, and the tail of the detection pin does not appear in the first mounting hole. During the operation of the rivet head, the probe touches the outer plate of the chain. At this time, the probe will compress the spring and contract, and at the same time push the detection pin toward the upper channel, causing the tail of the detection pin to protrude from the first mounting hole. The protruding detection pin cuts off the laser beam. With the completion of the rivet head operation, the assembly block (a combination of the upper rivet head assembly block 1 and the lower rivet head assembly block 2) moves up, and the spring force resets the position of the detection pin and probe. At this time, the detection pin that originally cut off the laser beam falls, and the laser beam passes through the detection hole again. The PLC controller connected to the device will determine this process as a correct process and will not report an error.
[0041] When the outer piece of the chain is missing, the probe cannot touch the outer piece of the chain during the falling process, resulting in the above process not happening. The laser beam remains in the path state, and the PLC controller will determine that the process is abnormal and thus issue an alarm.
Claims
1. A chain missing piece anti-error device, characterized by: The upper rivet head assembly block includes an upper rivet head assembly block, a lower rivet head assembly block, a probe, a detection pin, a spring, and a laser probe. The upper rivet head assembly block and the lower rivet head assembly block are fixedly connected by a first bolt. A first mounting hole is provided in the upper part of the upper rivet head assembly block along the horizontal direction. A laser probe is installed on one side of the first mounting hole. The laser probe is connected to the PLC controller signal of the cover riveting machine through a wire. The upper part of the upper rivet head assembly block is connected to the working end of the cover riveting machine. A second mounting hole is provided in the middle of the first mounting hole along the vertical direction downward to penetrate the lower rivet head assembly block. The lower part of the second mounting hole The upper portion is expanded to form a mounting groove for mounting the rivet head block, the detection pin and the probe are stacked up and mounted in the second mounting hole, the rivet head block is fixedly mounted in the mounting groove, the probe can slide through the bottom end of the rivet head block and partially expose its head, the second mounting hole is located at the lower part of the upper rivet head assembly block and is expanded to form a spring mounting hole, the spring is sleeved outside the detection pin, in the initial state, the tail of the detection pin does not enter the first mounting hole, when the bottom end of the probe is subjected to the resistance of the outer chain piece, the probe pushes the detection pin upward to overcome the elastic force of the spring and allow the tail of the detection pin to enter the first mounting hole.
2. A chain missing piece error prevention device according to claim 1, characterized in that: The bottom of the upper rivet head assembly block is provided with a first threaded hole in the longitudinal direction on both sides of the second mounting hole, and the lower rivet head assembly block opposite to the first threaded hole is provided with a through hole penetrating the upper and lower end surfaces. The upper rivet head assembly block and the lower rivet head assembly block are fixedly connected by a first bolt that passes through the through hole and is screwed to the first threaded hole.
3. A chain missing piece error prevention device according to claim 2, characterized in that: The bottom end of the upper rivet head assembly block is provided with a positioning groove, and the top end of the lower rivet head assembly block is provided with a positioning block, and the positioning block is used in conjunction with the positioning groove.
4. A chain missing piece error prevention device according to claim 3, characterized in that: The positioning groove and positioning block are both cylindrical, and second threaded holes penetrating the mounting groove are respectively provided on both sides of the lower rivet head assembly block. The rivet head block is spliced by a first rivet head block and a second rivet head block. The first rivet head block and the second rivet head block are respectively fixedly connected to the mounting groove by second bolts passing through the second threaded holes and screwed to the second threaded holes.
5. A chain missing piece error prevention device according to claim 4, characterized in that: The detection nail head is provided with a first bump structure, and the probe head is provided with a second bump structure. The top of the lower rivet head assembly block is located at the second mounting hole and a limiting groove is formed by expanding the diameter of the second mounting hole wall. The heads of the first bump structure and the second bump structure are abutted against each other and located in the limiting groove.
6. A chain missing piece error prevention device according to claim 5, characterized in that: The upper end of the spring is connected to the top wall of the spring mounting hole, and the lower end of the spring is connected to the inner surface of the first bump structure. When the probe is lifted, the first bump structure is loosely matched with the inner wall of the spring mounting hole.
7. A chain missing piece error prevention device according to claim 6, characterized in that: The first rivet head block and the second rivet head block have the same structure, both of which are cubic structures. The inner and outer ends of the cubic structure are symmetrically provided with semicircular grooves along the longitudinal direction. When the first rivet head block and the second rivet head block are closed, the two semicircular grooves allow the probe to pass through and slide with the probe.
8. A chain missing piece error prevention device according to claim 7, characterized in that: A dovetail groove is provided at the top of the upper rivet head assembly block, which passes through the front and rear ends. The two groove walls of the dovetail groove are respectively provided with a third threaded hole that passes through the side surface of the upper rivet head assembly block. A rectangular groove is provided on the outer surface of the front and rear ends of the upper rivet head assembly block and below the dovetail groove.