A lifting jack half-axle alignment welding device

Abstract

This invention solves the problem of asymmetry that easily occurs after welding a pair of trunnions to a jack. It relates to the field of jack technology, and particularly to a device for aligning and welding trunnions of a bottom-lifting jack. The device includes a base, a positioning structure installed in the center of the top surface of the base, two clamps slidably mounted on the top of the base on either side of the positioning structure, two grooves on the top of the base, and an electrically controlled displacement structure installed at the bottom of the base. This electrically controlled displacement structure drives the two clamps to adjust their relative distance. Each clamp includes a guide plate that mates with the electrically controlled displacement structure, a sleeve plate fitted onto the outer surface of the guide plate, and an electrically controlled chuck mounted on the top of the sleeve plate. This invention ensures that the two trunnions tightly attached to the jack are arranged 180° symmetrically, thus guaranteeing the accuracy of the welding. Simultaneously, the welding height of the trunnions relative to the jack surface can be adjusted as needed.

Description

Technical Field

[0001] This utility model relates to the field of jack technology, specifically to a bottom-lifting jack half-ear shaft alignment welding device. Background Technology

[0002] The main purpose of welding a pair of trunnions to both sides of the jack is to enhance the stability and durability of the structure. Trunnions are commonly used to connect the moving and stationary parts of the jack. Welding them can effectively improve the overall strength and service life, ensuring that the jack can better resist external forces during load-bearing.

[0003] In practical applications, when welding trunnions to jacks, they are usually butted together individually and then welded in place. In this case, it is difficult for the two trunnions to be arranged 180° symmetrically, which may lead to uneven stress distribution. As a result, when the jack is carrying a heavy load, one side may bear greater pressure, leading to structural instability and even damage. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a half-trunnion alignment welding device for lifting jacks, so as to solve the problem that asymmetry easily occurs after a pair of half-trunnions are welded to the jack as mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a half-ear shaft alignment welding device for lifting jacks, comprising a base, a positioning structure installed in the middle of the top surface of the base, two clamps respectively located on both sides of the positioning structure being slidably installed on the top of the base, two sliding grooves being provided on the top of the base, and an electrically controlled displacement structure being installed at the bottom of the base, the electrically controlled displacement structure being used to drive the two clamps to adjust the relative distance. The clamp includes a guide plate that docks with the electrically controlled displacement structure. A sleeve plate is fitted on the outer surface of the guide plate. An electrically controlled chuck is installed on the top of the sleeve plate. A lifting assembly for driving the sleeve plate to move up and down along the guide plate is installed on the top of the base.

[0006] Preferably, the lifting assembly includes two columns installed on the top surface of the base, and the front of the columns has several through holes arranged at equal intervals.

[0007] Preferably, the outer surfaces of both columns are fitted with a sleeve frame, and a connecting shaft is installed between the sleeve frame and the sleeve plate. The connecting shaft has an elastic clip that passes backward through the sleeve frame and the through hole.

[0008] Preferably, the connecting shaft has a columnar groove inside along the front-rear axial direction, and a guide groove communicating with the columnar groove is provided on the side of the connecting shaft. A spring column is provided inside the columnar groove, and the rear end of the spring column passes through a through hole on the surface of the column. A lever plate passing through the guide groove is installed on the surface of the spring column.

[0009] Preferably, a telescopic rod is installed between the sleeves fitted on the surfaces of the two columns, and a stop bar is rotatably installed on the connecting shaft.

[0010] Preferably, the positioning structure includes a threaded disc fixedly installed on the top surface of the base, and a cylinder support seat is detachably sleeved on the threaded disc.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model utilizes a positioning structure to hold the jack in the center of the base, and then uses two clamps to hold the half trunnion. With the help of an electric displacement structure, the two clamps are controlled to move relative to each other along the transverse central axis of the base. This can effectively ensure that the two half trunnions that are close to the jack are arranged symmetrically at 180°, thereby ensuring the accuracy of the welding joint.

[0012] 2. This utility model uses an electrically controlled chuck to clamp the half trunnion, and then uses an electrically controlled displacement component to move the chuck toward the location of the jack, so that the half trunnion fits against the surface of the jack. In this way, a lifting structure can be used to move the sleeve plate up and down along the guide plate, thereby changing the welding height position of the half trunnion relative to the surface of the jack.

[0013] 3. This utility model allows for the replacement of the cylinder support base according to the diameter of different jacks, thereby improving the adaptability of the device to jacks of various specifications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the disassembled positioning structure of this utility model; Figure 3 This is a schematic diagram of the lifting assembly of this utility model; Figure 4 This is a schematic diagram showing the positions of the connecting shaft and the spring column of this utility model.

[0015] In the diagram: 1. Base; 101. Slide groove; 2. Positioning structure; 201. Threaded disc; 202. Cylinder support seat; 3. Clamp; 301. Guide plate; 302. Sleeve plate; 303. Electrically controlled chuck; 4. Electrically controlled displacement structure; 5. Lifting assembly; 501. Column; 5011. Through hole; 502. Sleeve frame; 503. Connecting shaft; 5031. Columnar groove; 5032. Guide groove; 5033. Spring column; 5034. Paddle plate; 504. Telescopic rod; 505. Stop bar. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 This embodiment proposes a welding device for aligning the trunnions of a lifting jack, which enables height adjustment of the welding point on the jack surface. Its specific structure is as follows: Figures 1-4 As shown, the system includes a base 1 serving as the basic carrier. A positioning structure 2 is installed in the center of the top surface of the base 1. Two clamps 3 are slidably mounted on the top of the base 1, located on either side of the positioning structure 2. Each clamp 3 includes a guide plate 301 that mates with an electrically controlled displacement structure 4. A sleeve plate 302 is fitted onto the outer surface of the guide plate 301. An electrically controlled chuck 303 is installed on the top of the sleeve plate 302. Two sliding grooves 101 are formed on the top of the base 1. The electrically controlled displacement structure 4 is installed at the bottom of the base 1. The electrically controlled displacement structure 4 is basically consistent with the structure and function of existing technologies, aiming to adjust the relative position of the two clamps 3 that are slidably connected to it. Therefore, it will not be described in detail here. In practical applications, the main body of the jack is fitted into the positioning structure 2 to ensure that the main body of the jack is located in the center of the base 1. Place the trunnion corresponding to the jack on the clamp 3 and use the clamp 3 to fasten it. In conjunction with the operation of the electric displacement structure 4, drive the two electric displacement structures 4 to move synchronously toward the location of the jack, so that the end of the trunnion clamped by the electric chuck 303 is in contact with the surface of the jack. Only then can other tools be used to perform welding operations on the two.

[0018] In addition, a lifting assembly 5 is installed on the top of the base 1 to drive the sleeve plate 302 to move up and down along the guide plate 301, so as to facilitate the adjustment of the welding height of the half trunnion on the surface of the jack.

[0019] Specifically, the lifting assembly 5 includes two columns 501 mounted on the top surface of the base 1. Each column 501 has several through holes 5011 arranged equidistantly on its front side. A frame 502 is fitted onto the outer surface of each column 501, and a connecting shaft 503 is installed between the frame 502 and the sleeve plate 302. The connecting shaft 503 has a columnar groove 5031 axially spaced inside, and a guide groove 5032 communicating with the columnar groove 5031 on its side. A spring column 5033 is located inside the columnar groove 5031, and the rear end of the spring column 5033 passes through a through hole 5011 on the surface of the column 501. A lever 5034 passing through the guide groove 5032 is mounted on the surface of the spring column 5033. When it is necessary to adjust the welding height of the half-earshaft relative to the jack surface, the spring column 5033 is squeezed to disengage it from the through hole 5011 on the column 501. Then, the connecting shaft 503 is lifted upwards, causing the sleeve 502 to slide up or down along the surface of the column 501 until the set position is reached. The squeezing force on the spring column 5033 is then released. Under its own elastic restoring action, the spring column 5033 passes backwards through the through hole 5011 at the set height position, thereby achieving the purpose of locking the height of the connecting shaft 503 and the sleeve plate 302. The application of the lever plate 5034 facilitates the direct application of squeezing force to the spring column 5033 along the side of the connecting shaft 503.

[0020] Following the above, a telescopic rod 504 is installed between the sleeves 502 fitted onto the surfaces of the two columns 501, and a stop bar 505 is rotatably mounted on the connecting shaft 503. The spring column 5033 is pressed backward by the lever 5034. After the spring column 5033 is pressed into place, the stop bar 505 is rotated so that it hangs downward and is located behind the lever 5034, thus limiting the pressed spring column 5033. This eliminates the need to continuously press the spring column 5033 while the sleeves 502 slide upward or downward along the surface of the columns 501.

[0021] The telescopic rod 504 connects the two sleeve frames 502 to form a whole, without obstructing the operation of the electrically controlled displacement structure 4. Furthermore, when moving the sleeve frames 502 on the surfaces of the two columns 501 up and down, the two spring columns 5033 can be pre-pressed and limited by the stop bar 505, keeping both spring columns 5033 in a retracted state. Then, only an upward or downward external force needs to be applied to the telescopic rod 504 to drive the two sleeve frames 502 to move synchronously upward or downward.

[0022] like Figure 2 As shown, the positioning structure 2 includes a threaded disc 201 fixedly installed on the top surface of the base 1. A cylinder support seat 202 is detachably mounted on the threaded disc 201, which facilitates the replacement of the cylinder support seat 202 according to the diameter of different jacks, so as to improve the adaptability of the device to jacks of various specifications.

[0023] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting jack half-trunnion alignment welding device, comprising a base (1), characterized in that: A positioning structure (2) is installed in the middle of the top surface of the base (1). Two clamps (3) are slidably installed on the top of the base (1) on both sides of the positioning structure (2). Two sliding grooves (101) are opened on the top of the base (1). An electrically controlled displacement structure (4) is installed at the bottom of the base (1). The electrically controlled displacement structure (4) is used to drive the two clamps (3) to adjust the relative distance. The clamp (3) includes a guide plate (301) that docks with the electrically controlled displacement structure (4). A sleeve plate (302) is fitted on the outer surface of the guide plate (301). An electrically controlled chuck (303) is installed on the top of the sleeve plate (302). A lifting assembly (5) for driving the sleeve plate (302) to move up and down along the guide plate (301) is installed on the top of the base (1).

2. The lifting jack half-trunnion alignment welding device according to claim 1, characterized in that: The lifting assembly (5) includes two columns (501) installed on the top surface of the base (1), and the front of the columns (501) has several through holes (5011) arranged at equal intervals.

3. The lifting jack half-trunnion alignment welding device according to claim 2, characterized in that: Both of the columns (501) are fitted with a sleeve frame (502) on their outer surfaces, and a connecting shaft (503) is installed between the sleeve frame (502) and the sleeve plate (302).

4. The lifting jack half-trunnion alignment welding device according to claim 3, characterized in that: The connecting shaft (503) has a columnar groove (5031) inside along the front and rear axial direction. The connecting shaft (503) has a guide groove (5032) on its side that communicates with the columnar groove (5031). The columnar groove (5031) has a spring column (5033) inside. The rear end of the spring column (5033) passes through a through hole (5011) on the surface of the column (501). A lever (5034) that passes through the guide groove (5032) is installed on the surface of the spring column (5033).

5. The lifting jack half-trunnion alignment welding device according to claim 4, characterized in that: A telescopic rod (504) is installed between the sleeves (502) fitted on the surfaces of the two columns (501), and a stop bar (505) is rotatably installed on the connecting shaft (503).

6. The lifting jack half-trunnion alignment welding device according to claim 1, characterized in that: The positioning structure (2) includes a threaded disc (201) fixedly installed on the top surface of the base (1), and a cylinder support seat (202) is detachably sleeved on the threaded disc (201).

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