A connector seat locking device

Abstract

This utility model discloses a connecting seat locking device, which is installed on the frame of a piston rod tightening machine for locking a lifting ring and a piston rod. The connecting seat locking device includes a first base; a first transmission assembly; a first power assembly, the first power assembly including a first reducer mounted on a first bearing seat b and located in a first middle layer, the output shaft of the first reducer extending downward from the first bearing seat b into a first lower layer, the first power assembly also including a first servo motor connected to the input shaft of the first reducer; a first vertical floating assembly, the first vertical floating assembly being disposed on top of a first torque sensor and located in a first upper layer; and a lifting ring fixing fixture disposed on the first vertical floating assembly. The beneficial effects of this utility model are: this technical solution, through modular structural design, high-precision torque control, and adaptive floating function, significantly improves the locking quality and production efficiency of the piston rod and lifting ring, and is suitable for automated assembly production lines.

Description

Technical Field

[0001] This utility model relates to the field of automated assembly technology, and in particular to a connecting seat locking device. Background Technology

[0002] In automated assembly lines in fields such as construction machinery and automobile manufacturing, the reliable connection between the piston rod and the lifting ring is a crucial factor in ensuring the stability of equipment operation. Currently, two technical solutions are commonly used for locking the piston rod and lifting ring: one is the traditional mechanical locking device, which directly applies torque manually or with a pneumatic wrench to complete the locking. This type of device has significant drawbacks: on the one hand, the locking force depends on the operator's experience or the fixed pressure of the pneumatic tool, and it is impossible to monitor and provide feedback on the actual torque value in real time, which can easily lead to problems such as being too tight (causing thread stripping) or too loose (loosening and falling off during operation); on the other hand, there is a height tolerance (usually ±2-3mm) in the assembly of the lifting ring and piston rod, and the rigid contact locking method can easily cause damage to the end face of the lifting ring or piston rod, affecting the assembly quality. Secondly, while some improved electric locking devices incorporate servo motor drives, their transmission structures and positioning components often employ a distributed layout (e.g., the power motor, reduction mechanism, and sensors are placed in different positions on the frame). This not only occupies a large space but also leads to significant accumulation of transmission errors between components (e.g., gear meshing clearance, shaft runout), resulting in a final output torque accuracy of only ±5%FS (full-scale error), which is insufficient to meet high-precision assembly requirements. Furthermore, existing devices often use single-pin positioning for the lifting ring fixing fixture. During the locking process, the lifting ring is prone to rotational displacement (the displacement can reach ±0.5mm), causing a misalignment between the piston rod and the lifting ring, affecting connection reliability.

[0003] Therefore, it is necessary to develop a locking device for the connecting seat. After searching, no technical solution identical to this utility model was found. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a connecting seat locking device, thereby solving one or more of the above-mentioned prior art problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a connecting seat locking device, which is installed on the frame of a piston rod tightening machine for locking the lifting ring and the piston rod. Its innovation lies in that the connecting seat locking device includes...

[0006] A first base, wherein a first partition a and a first partition b are provided on the first base, the first partition a and the first partition b dividing the first base into a first lower layer, a first middle layer and a first upper layer arranged sequentially from bottom to top;

[0007] A first transmission assembly, the first transmission assembly including a first torque sensor, the upper part of the first torque sensor being assembled with a first bearing housing c and its top end extending upward from the first bearing housing c and into a first upper layer, the lower part of the first torque sensor being assembled with a first bearing housing a and its bottom end extending downward from the first bearing housing a and into a first lower layer.

[0008] The first power assembly includes a first reducer mounted on a first bearing housing b and located in a first middle layer, the output shaft of the first reducer extending downward from the first bearing housing b and into a first lower layer, and the first power assembly also includes a first servo motor that is connected to the input shaft of the first reducer.

[0009] The first vertical floating component is disposed on top of the first torque sensor and is located within the first upper layer;

[0010] A lifting ring fixing fixture is disposed on the first vertical floating assembly.

[0011] In some embodiments, a first bearing seat a and a first bearing seat b are provided on the first partition a, and a first bearing seat c is provided on the first partition b, with the first bearing seat c located directly above the first bearing seat a.

[0012] In some embodiments, the first transmission assembly further includes a first conversion gear a disposed at the bottom end of the first torque sensor.

[0013] In some embodiments, the first power assembly further includes a first shift gear b mounted at the end of the output shaft of the first reducer and located in the first lower layer, wherein the first shift gear a and the first shift gear b mesh with each other.

[0014] In some embodiments, the first vertical floating assembly includes a first fixed seat and a first floating seat coaxially arranged. The first fixed seat is provided with a first spring groove, and a first spring is provided in the first spring groove. One end of the first spring is fixed to the bottom of the first spring groove, and the other end is fixedly connected to the top of the first floating seat.

[0015] In some embodiments, the eye-fixing fixture is disposed on a first floating seat, the eye-fixing fixture including a first support and a first eye-pin, the first support having at least one first mounting groove for assembling the first eye-pin.

[0016] In some embodiments, the number of first mounting slots is 2-4, which are evenly distributed along the circumference of the first support.

[0017] In some implementations, the input shaft of the first reducer is connected to the output shaft of the first servo motor via a coupling.

[0018] The beneficial effects of this utility model are: through modular structural design, high-precision torque control and adaptive floating function, this technical solution significantly improves the locking quality and production efficiency of piston rod and lifting ring, and is suitable for automated assembly production lines. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0020] Figure 1 This is an axial view of a connecting seat locking device according to this utility model.

[0021] Figure 2 This is a front view of a connecting seat locking device according to this utility model.

[0022] Figure 3 This is a rear view of a connecting seat locking device according to this utility model.

[0023] Figure 4 This is a cross-sectional view of a connecting seat locking device according to this utility model. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figures 1 to 4 As shown, this utility model embodiment includes: a connecting seat locking device, applied to the frame of a piston rod tightening machine, mainly used to achieve high-precision locking between the lifting ring and the piston rod. The specific structure, working principle, and advantages of this device are described in detail below with reference to the accompanying drawings:

[0026] The first base (110) is cast from Q235 steel and has a rectangular structure with a thickness of 20mm. The bottom surface is fixedly connected to the frame of the piston rod tightening machine by four M12 bolts. The first base 110 has a first partition a111 and a first partition b112 arranged vertically. Both partitions are 10mm thick steel plates and are fixed to the inner wall of the first base 110 by welding. The first partition a111 and the first partition b112 divide the first base 110 into a first lower layer, a first middle layer and a first upper layer arranged from bottom to top: the first lower layer is 50mm high and is used to arrange the transmission gear and the lower end of the sensor; the first middle layer is 400mm high and is used to install the reducer; the first upper layer is 600mm high and is used to set up the floating component and the lifting ring fixing fixture. This layered design arranges the power transmission, torque monitoring and floating positioning functions in separate areas, which is convenient for subsequent maintenance and fault diagnosis. Its advantages are: high space utilization and clear modular layout.

[0027] The first transmission assembly includes a first torque sensor 121 (model TRT-500, range 0-500 N·m, accuracy ±0.5% FS). Its upper part is assembled with a first bearing housing c124 (deep groove ball bearing 6205) on the first partition b112, with its top end extending upwards through the first bearing housing c124 and into the first upper layer. Its lower part is assembled with a first bearing housing a122 (deep groove ball bearing 6205) on the first partition a111, with its bottom end extending downwards through the first bearing housing a122 and into the first lower layer. A first conversion gear a125 (module 2, number of teeth 20) is coaxially fixed to the bottom of the first torque sensor 121, used to transmit torque and monitor the locking force value in real time. Its advantages are: high control accuracy due to direct acquisition of torque data through the sensor.

[0028] The first power assembly is located in the first middle layer and includes a first reducer 152 (model RV-40, reduction ratio 1:10) and a first servo motor 151 (model MS1H5-20B, rated torque 20 N·m). The first reducer 152 is fixed to the first bearing housing b123 (thrust ball bearing 51105) on the first partition a111 by four M6 bolts. Its input shaft is connected to the output shaft of the first servo motor 151 through a flexible coupling (model JM2-14). The output shaft passes downward through the first bearing housing b123 and extends into the first lower layer. The end is coaxially fixed with a first conversion gear b126 (module 2, number of teeth 30). The first conversion gear b126 meshes with the first conversion gear a125 (transmission ratio 1.5:1) to convert the high speed and low torque of the motor into low speed and high torque output. Its advantages are: high gear transmission efficiency, up to 98%, and the locking force requirement is met after reduction and torque increase.

[0029] The first vertical floating assembly is located at the top of the first torque sensor 121 (inside the first upper layer), including a first fixed seat 131 and a first floating seat 132 (both made of aluminum alloy with anodized surface) arranged coaxially. The bottom of the first fixed seat 131 is fixedly connected to the external thread at the top of the first torque sensor 121 via an internal thread. The top of the fixed seat 131 has a first spring groove 133 with a diameter of 25 mm and a depth of 30 mm. A first spring 134 (elastic coefficient 50 N / mm, free length 40 mm) is installed in the groove. One end of the first spring 134 is welded and fixed to the bottom of the spring groove, and the other end is welded and fixed to the bottom of the first floating seat 132, so that the first floating seat 132 can float elastically relative to the first fixed seat 131 in the vertical direction (maximum floating stroke ±5 mm). This design can adapt to the height tolerance of the lifting ring (e.g., ±2 mm) and avoid damage to parts caused by rigid contact. Its advantages are: floating buffer protection and strong compatibility.

[0030] The lifting ring fixing fixture is set on the top of the first floating seat 132, including a first support 141 (circular steel plate, diameter 80mm) and three first lifting ring inserts 143 (cylindrical pins, diameter 12mm, height 20mm). The first support 141 is fixedly connected to the first floating seat 132 by four M4 bolts. It has three first mounting grooves 142 (diameter 12.5mm, depth 15mm) evenly opened around its circumference. The first lifting ring inserts 143 are interference-fitted into the grooves (fit tolerance H7 / k6). In use, the positioning hole of the lifting ring is aligned with the first lifting ring insert 143 and inserted. The quick positioning is achieved by the gap fit between the insert and the hole (gap 0.1-0.2mm), which prevents the lifting ring from rotating and shifting during the locking process. Its advantages are: high positioning accuracy of multiple inserts, ±0.1mm, ensuring consistent locking.

[0031] The working principle of this technical solution is as follows: When it is necessary to lock the lifting ring and the piston rod, firstly, align the positioning hole of the lifting ring with the first lifting ring insert 143 and press it down. The first floating seat 132 compresses the first spring 134 (the spring force provides the preload force) until the bottom surface of the lifting ring is in contact with the first support 141. Then, start the first servo motor 151. The motor output torque is reduced and increased by the first reducer 152, and then drives the first conversion gear a125 to rotate through the first conversion gear b126, thereby driving the first torque sensor 121 to rotate synchronously. The first torque sensor 121 monitors the torque value in real time. When the preset locking torque (e.g., 300 N·m) is reached, the first servo motor 151 stops, completing the locking operation. After locking, the elastic force of the first spring 134 keeps the lifting ring in contact with the piston rod, avoiding loosening due to machining errors.

[0032] The advantages of this technical solution are:

[0033] Compact structure and easy maintenance: The layered base divides the power, transmission and positioning components into sections, reducing space occupation, and the opening design of each layer facilitates daily maintenance (such as replacing gears or sensors).

[0034] High locking accuracy: The torque is monitored in real time by the first torque sensor 121 (accuracy ±2.5N·m), combined with the high transmission efficiency (98%) of the gear transmission, ensuring accurate and controllable locking force.

[0035] Strong adaptability: The elastic design of the first floating component can accommodate a lifting ring height tolerance of ±2mm, expanding the applicability of the device.

[0036] High positioning reliability: The three first lifting eyelet pins are evenly distributed circumferentially, with a positioning accuracy of ±0.1mm, effectively preventing the lifting eyelet from rotating and shifting, and ensuring consistent locking.

[0037] In summary, this connecting seat locking device, through its modular structural design, high-precision torque control, and adaptive floating function, significantly improves the locking quality and production efficiency of the piston rod and lifting ring, making it suitable for automated assembly lines.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A connecting seat locking device, which is arranged on a frame of a piston rod tightening machine, and is used for locking a lifting ring and a piston rod, characterized in that: The connecting seat locking device includes A first base (110) is provided with a first partition a (111) and a first partition b (112). The first partition a (111) and the first partition b (112) divide the first base (110) into a first lower layer, a first middle layer and a first upper layer arranged sequentially from bottom to top. The first transmission assembly includes a first torque sensor (121), the upper part of which is assembled with a first bearing seat c (124) and its top end extends upward from the first bearing seat c (124) and into the first upper layer; the lower part of which is assembled with a first bearing seat a (122) and its bottom end extends downward from the first bearing seat a (122) and into the first lower layer. The first power assembly includes a first reducer (152) mounted on a first bearing housing b (123) and located in a first middle layer. The output shaft of the first reducer (152) extends downward from the first bearing housing b (123) and into a first lower layer. The first power assembly also includes a first servo motor (151) that is connected to the input shaft of the first reducer (152). The first vertical floating component is disposed on top of the first torque sensor (121) and is located in the first upper layer; A lifting ring fixing fixture is disposed on the first vertical floating assembly.

2. A connection seat locking device according to claim 1, characterized in that: The first partition a (111) is provided with a first bearing seat a (122) and a first bearing seat b (123), and the first partition b (112) is provided with a first bearing seat c (124), and the first bearing seat c (124) is located directly above the first bearing seat a (122).

3. The connection seat locking device according to claim 1, characterized in that: The first transmission assembly also includes a first conversion gear a (125) disposed at the bottom end of the first torque sensor (121).

4. A connection seat locking device according to claim 3, characterized in that: The first power assembly also includes a first conversion gear b (126) mounted at the end of the output shaft of the first reducer (152) and located in the first lower layer, wherein the first conversion gear a (125) meshes with the first conversion gear b (126).

5. The connection seat locking device according to claim 1, characterized in that: The first vertical floating assembly includes a first fixed seat (131) and a first floating seat (132) arranged coaxially. The first fixed seat (131) is provided with a first spring groove (133), and a first spring (134) is provided in the first spring groove (133). One end of the first spring (134) is fixed to the bottom of the first spring groove (133), and the other end is fixedly connected to the top of the first floating seat (132).

6. A connection seat locking device according to claim 5, characterized in that: The lifting ring fixing fixture is disposed on the first floating seat (132). The lifting ring fixing fixture includes a first support (141) and a first lifting ring insert (143). The first support (141) is provided with at least one first mounting groove (142) for assembling the first lifting ring insert (143).

7. A connection seat locking device according to claim 6, characterized in that: The number of the first mounting slots (142) is 2-4, and they are evenly distributed along the circumference of the first support (141).

8. The connection seat locking device according to claim 1, characterized in that: The input shaft of the first speed reducer (152) is butted with the output shaft of the first servo motor (151) through a shaft coupling.

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