Pull head moving assembly and hook scale calibration device

Abstract

The present invention discloses a pull head moving assembly and a hook scale calibration device. The pull head moving assembly includes an upper pull head for hook scale calibration, and the upper pull head is slidably connected to a cross frame through a sliding member, and moves linearly and horizontally with the cross frame. The pull head of the hook scale calibration device adopts the pull head moving assembly provided by the present invention. The pull head moving assembly provided by the present invention drives the sliding member to move linearly and horizontally through a power mechanism to drive a ball screw transmission, thereby driving the upper pull head fixed on the sliding member to move linearly and horizontally; replacing the pull head of the hook scale calibration device in the prior art with the pull head moving assembly can greatly reduce the installation work of the hook scale, especially the large-capacity hook scale and the pull head, and improve work efficiency. At the same time, the present invention can accurately locate the position of the upper pull head through the displacement control function of the servo motor and the limit connection between the center suspension rod and the pull head adapter, thereby controlling the position of the hook scale to be calibrated on the upper pull head, and achieving accurate and reliable hook scale calibration results.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic weighing instruments, in particular to a pull head moving component and a hook scale calibration device. Background Art

[0002] Hook scales are widely used in heavy machinery, logistics warehousing, port terminal loading and unloading and weighing. With the development of economy and society, large-capacity hook scales (10t, 30t, 50t, 100t, etc.) are increasingly used. According to the traditional static weight principle, calibration by hanging weights is no longer suitable for large-capacity hook scales. At present, the static weight / superposition composite hook scale calibration device solves the above problems. It can realize the static weight principle (hanging weight loading) for small-capacity hook scale calibration, and the superposition force standard machine (hydraulic loading) for large-capacity hook scale calibration. It has the advantages of wide detection range, high precision and low manufacturing cost.

[0003] In the past, the pulling heads used in conjunction with the static weight / superposition composite hook scale calibration device were all fixedly installed on the calibration device. When calibrating the hook scale, especially the large-capacity hook scale, this pulling head assembly is very laborious and cumbersome due to the large weight and size of the hook scale. For example, a 100t hook scale usually has a deadweight of 1t and a length of 2m. The installation of the hook scale and the pulling head is very laborious and cumbersome. The present invention provides a pulling head moving assembly and applies the pulling head moving assembly to the hook scale calibration work for the first time, which greatly reduces the workload of the staff and improves work efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a pull head moving assembly and a hook scale calibration device to solve the problems raised in the above technical background.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A pull head moving assembly comprises an upper pull head for hook scale calibration. The upper pull head is slidably connected with a cross frame through a sliding piece and moves horizontally and linearly with the cross frame.

[0007] In the above technical solution, the upper slider is fixedly connected to the sliding member via a slider adapter, and the sliding member is slidably connected to the cross frame.

[0008] In the above technical solution, the horizontal frame includes two horizontally symmetrically arranged brackets, each bracket has a linear guide rail on the lower side, and each bracket has a fixing piece fixedly connected to the hook scale calibration device at one end on the upper side;

[0009] During installation, the parts of the two brackets provided with the fixing pieces are fixedly arranged in the hook scale calibration device, and the other parts of the two brackets extend out of the hook scale calibration device.

[0010] In the above technical solution, the sliding member includes a moving plate, a slider adapter is vertically passed through the middle of the moving plate, and the lower end of the slider adapter is connected to the upper slider;

[0011] A linear slider is symmetrically arranged on the left and right upper surfaces of the movable plate, and the two linear sliders are matched one by one with the linear guide rails correspondingly arranged on the lower sides of the two brackets and are horizontally slidably connected;

[0012] A moving seat is also provided on one side of the lower end surface of the moving plate, and a ball screw is passed through the moving seat. The ball screw is arranged parallel to the two linear guide rails, and one end of the ball screw is fixed to a bearing seat, and the other end is connected to a power mechanism. The bearing seat is fixed to one end of one of the brackets, and the power mechanism is arranged on one side of the other end of the bracket fixed to the bearing seat.

[0013] In the above technical solution, the power mechanism includes a servo motor and a reducer, the servo motor and the reducer are fixedly connected, the reducer is fixed on a bracket with a bearing seat through a motor seat, and the output end of the reducer is fixedly connected to an end of the ball screw away from the bearing seat.

[0014] In the above technical solution, a conical limiting slot with no taper angle is provided at the top center of the slider adapter, and the limiting slot extends to the side of the slider adapter through a trapezoidal opening.

[0015] A hook scale calibration device, comprising an upper pull head connection assembly, a moving beam on the hook scale calibration device, and a central suspension rod provided on the moving beam; a limit block corresponding to a pull head adapter is provided at the lower end of the central suspension rod, the upper pull head connection assembly adopts the pull head moving assembly described in the above technical solution, and the upper pull head connection assembly is fixed on the moving beam through a cross frame;

[0016] When the upper pull head moves to the loading axis where the central suspension rod is located, a limiting block provided at the lower end of the central suspension rod is limitedly connected to the pull head adapter connected to the upper pull head.

[0017] In the above technical solution, a conical limit slot without a taper angle is provided at the top center of the slider adapter, and the limit slot extends to the side of the slider adapter through a trapezoidal opening; when the upper slider moves to the loading axis where the center hanger is located, the limit block provided at the lower end of the center hanger enters the limit slot through the trapezoidal opening and is snap-fitted and connected with the limit slot.

[0018] In the above technical solution, the diameter of the end surface of one end of the limit block provided on the central suspension rod is 1 / 3 to 2 / 3 of the diameter of the top end surface of the pull head adapter.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The pull head moving assembly provided by the present invention is started by a power mechanism, which drives the ball screw transmission to make the sliding member move horizontally to the left or right, thereby driving the upper pull head fixed on the sliding member to move to the left or right; replacing the pull head of the hook scale calibration device in the prior art with the pull head moving assembly can greatly reduce the installation work of the hook scale, especially the large-capacity hook scale and the pull head, reduce the burden on the staff and improve work efficiency.

[0021] 2. The present invention can accurately locate the position of the upper pull head through the displacement control function of the servo motor and the limit connection between the center suspension rod and the pull head adapter, thereby controlling the position of the hook scale to be calibrated on the upper pull head, ensuring that after the hook scale to be calibrated is installed, its own axis can coincide with the loading axis of the composite force standard machine (i.e., the hook scale calibration device), thereby achieving accurate and reliable calibration results of the hook scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the slider moving assembly of the present invention;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 It is a side view of the slider moving assembly of the present invention;

[0025] Figure 4 A top view of the slider moving assembly of the present invention;

[0026] Figure 5 It is a front view of the slider adapter of the present invention;

[0027] Figure 6 It is a top view of the slider adapter of the present invention;

[0028] Figure 7 for Figure 5 Cross-sectional view of the middle BB;

[0029] Figure 8 It is a structural schematic diagram of the hook scale calibration device in the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the central suspension rod in the present invention;

[0031] Fig.10 It is a schematic diagram of the connection between the pull head adapter and the central suspension rod in the present invention;

[0032] In the figure, 1, upper pull head; 2, sliding part; 2.1, moving plate; 2.2, linear slider; 2.3, moving seat; 2.4, ball screw; 2.41, ball screw nut; 2.5, bearing seat; 2.6, power mechanism; 2.61, servo motor; 2.62, reducer; 2.7, motor seat; 3, cross frame; 3.1, bracket; 3.11, fixing part; 3.2, linear guide; 4, pull head adapter; 4.1, limit slot hole; 4.2, trapezoidal opening;

[0033] 100. Moving beam; 200. Center hanger; 300. Limit block. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] See also Figures 1 to 4 The present invention provides a pull head moving assembly, including an upper pull head 1 for hook scale calibration, wherein the upper pull head 1 is fixedly connected to a sliding member 2 through a pull head adapter 4, and the sliding member 2 is slidably connected to a cross frame 3 and moves horizontally linearly with the cross frame 3.

[0037] See also Figure 1 , Figure 3 and Figure 4 The horizontal frame 3 includes two horizontally symmetrically arranged brackets 3.1, each bracket 3.1 is provided with a linear guide rail 3.2 on the lower side, and each bracket 3.1 is provided with a fixing piece 3.11 fixedly connected to the hook scale calibration device at one end of the upper side; during installation, the parts of the two brackets 3.1 provided with the fixing pieces 3.11 are fixedly arranged in the hook scale calibration device, and the other parts of the two brackets 3.1 extend out of the hook scale calibration device.

[0038] See also Figure 1 and Figure 2The sliding member 2 includes a moving plate 2.1, and a slider adapter 4 is vertically penetrated in the middle of the moving plate 2.1, and the lower end of the slider adapter 4 is connected to the upper slider 1;

[0039] A linear slider 2.2 is symmetrically provided on the left and right sides of the upper end surface of the movable plate 2.1, and the two linear sliders 2.2 correspond to the linear guide rails 3.2 provided on the lower sides of the two brackets 3.1 one by one and are horizontally slidably connected; a movable seat 2.3 is also provided on one side of the lower end surface of the movable plate 2.1, and a ball screw 2.4 is passed through the movable seat 2.3, and the ball screw 2.4 is rotatably connected to the ball screw nut 2.41 fixed on the movable seat, and the ball screw 2.4 is arranged in parallel with the two linear guide rails 3.2, and one end of the ball screw 2.4 is fixed to a bearing seat 2.5, and the other end is connected to a power mechanism 2.6, the bearing seat 2.5 is fixed to one end of one of the brackets 3.1, and the power mechanism 2.6 is arranged on one side of the other end of the bracket 3.1 corresponding to the bearing seat 2.5. The power mechanism 2.6 comprises a servo motor 2.61 and a reducer 2.62, wherein the servo motor 2.61 is fixedly connected to the reducer 2.62, the reducer 2.62 is fixedly connected to a bracket 3.1 provided with a bearing seat 2.5 through a motor seat 2.7, and the output end of the reducer 2.62 is fixedly connected to an end of the ball screw 2.4 away from the bearing seat 2.5.

[0040] See also Figures 5 to 7 A conical limiting slot 4.1 without a taper angle is provided at the top center of the slider adapter 4, and the limiting slot 4.1 extends to the side of the slider adapter 4 through a trapezoidal opening.

[0041] The method of using the pull head moving assembly in the present invention is as follows: when the pull head moving assembly provided by the present invention is installed in the hook scale calibration device (prior art) through the fixing part 3.11 on the horizontal frame 3, the power mechanism 2.6 (servo motor 2.61 and reducer 2.62) is started, driving the ball screw 2.4 to transmit and make the sliding part 2 move horizontally to the left or right, thereby driving the upper pull head 1 fixed on the sliding part 2 to move to the left or right. At the same time, the displacement control function of the servo motor can be used to accurately locate the position of the upper pull head, thereby controlling the position of the hook scale to be calibrated on the upper pull head.

[0042] See also Figures 8 to 10 The present invention provides a hook scale calibration device, comprising an upper pull head connection assembly, a moving beam 100 on the hook scale calibration device, and a central suspension rod 200 provided on the moving beam 100, wherein a limit block 300 corresponding to a pull head adapter 4 is provided at the lower end of the central suspension rod 200, and the upper pull head connection assembly adopts the pull head moving assembly described in the above technical solution, and the upper pull head connection assembly is fixed on the moving beam 100 through a cross frame 3;

[0043] When the power mechanism 2.6 drives the ball screw 2.4 to move the upper slider 1 to the loading axis where the central suspension rod 200 is located, the limit block 300 provided at the lower end of the central suspension rod 100 is limitedly connected to the slider adapter 4 connected to the upper slider 1.

[0044] Furthermore, a conical limit slot 4.1 with no taper angle is provided at the top center of the slider adapter 4, and the limit slot 4.1 extends to the side of the slider adapter 4 through a trapezoidal opening 4.2; when the upper slider 1 moves to the loading axis where the center hanger 200 is located, the limit block 300 provided at the lower end of the center hanger 200 enters the limit slot 4.1 through the trapezoidal opening 4.2, and is locked and connected with the limit slot 4.1. Furthermore, when the upper pull head 1 moves to the loading axis where the center hanger 200 is located, the upper end surface of the conical limit slot 4.1 on the pull head adapter 4 is stuck in the connection between the center hanger 200 and the limit block 300. During the loading process of the hook scale calibration, the center hanger 200 moves upward, and the limit block 300 of the center hanger 200 fits with the inner wall of the conical limit slot 4.1. At the same time, the upper pull head's own axis can be automatically adjusted so that its own axis coincides with the loading axis of the hook scale calibration device, thereby achieving accurate and reliable calibration results of the hook scale.

[0045] Furthermore, the center suspension rod 100 is provided with a limit block 300, and the diameter of one end face of the limit block 300 is 1 / 3 to 2 / 3 of the diameter of the top end face of the slider adapter 4, so that the center suspension rod 100 is stably connected to the slider adapter 4 and is not easy to be disengaged.

[0046] The other components of the hook scale calibration device also provided by the present invention and the connection relationship between the components are prior art, for example, the hook scale calibration device provided by patent publication number CN106679786A and named as a static weight and superposition composite hook scale calibration device, the difference is that the upper pull head used in the hook scale calibration device is the pull head moving assembly described in the above technical scheme provided by the present invention, and the central hanging rod 200 provided on the moving beam 100 is connected to the pull head adapter 4 through a limit block 300.

[0047] The hook scale calibration device provided by the present invention can accurately locate the position of the upper pulling head through the displacement control function of the servo motor and the limiting connection between the central suspension rod and the pulling head adapter, thereby controlling the position of the hook scale to be calibrated on the upper pulling head, ensuring that after the hook scale to be calibrated is installed, its own axis can coincide with the loading axis of the composite force standard machine, thereby achieving accurate and reliable calibration results of the hook scale.

[0048] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A pull head moving assembly, comprising an upper pull head (1) for hook scale calibration, characterized in that: The upper pull head (1) is slidably connected to the cross frame (3) via a sliding member (2) and moves horizontally and linearly with the cross frame (3); The upper slider (1) is fixedly connected to the sliding member (2) via a slider adapter (4), and the sliding member (2) is slidably connected to the cross frame (3); The horizontal frame (3) comprises two horizontally symmetrically arranged brackets (3.1), each bracket (3.1) is provided with a linear guide rail (3.2) on the lower side, and each bracket (3.1) is provided with a fixing piece (3.11) fixedly connected to the hook scale calibration device at one end of the upper side; During installation, a portion of the two brackets (3.1) provided with the fixing member (3.11) is fixedly arranged in the hook scale calibration device, and another portion of the two brackets (3.1) extends out of the hook scale calibration device; The sliding member (2) comprises a moving plate (2.1), a slider adapter (4) is vertically passed through the middle of the moving plate (2.1), and the lower end of the slider adapter (4) is connected to the upper slider (1); A linear slider (2.2) is symmetrically provided on the left and right upper end surfaces of the movable plate (2.1), and the two linear sliders (2.2) are matched one by one with the linear guide rails (3.2) provided on the lower sides of the two brackets (3.1) and are connected in a horizontal sliding manner; A moving seat (2.3) is also provided on one side of the lower end surface of the moving plate (2.1), a ball screw (2.4) is passed through the moving seat (2.3), the ball screw (2.4) is arranged in parallel with the two linear guide rails (3.2), one end of the ball screw (2.4) is fixed to a bearing seat (2.5), and the other end is connected to a power mechanism (2.6), the bearing seat (2.5) is fixed to one end of one of the brackets (3.1), and the power mechanism (2.6) is arranged on one side of the other end of the bracket (3.1) to which the bearing seat (2.5) is fixed; A conical limiting slot hole (4.1) without a taper angle is provided at the top center of the slider adapter (4), and the limiting slot hole (4.1) extends to the side of the slider adapter (4) through a trapezoidal opening.

2. The slider moving assembly according to claim 1, characterized in that: The power mechanism (2.6) comprises a servo motor (2.61) and a reducer (2.62); the servo motor (2.61) and the reducer (2.62) are fixedly connected; the reducer (2.62) is fixed to a bracket (3.1) provided with a bearing seat (2.5) via a motor seat (2.7); and an output end of the reducer (2.62) is fixedly connected to an end of the ball screw (2.4) away from the bearing seat (2.5).

3. The hook scale calibration device is characterized by: The invention comprises an upper slider connection assembly, a moving beam (100) on a hook scale calibration device, and a central suspension rod (200) provided on the moving beam (100); a limit block (300) corresponding to a slider adapter (4) is provided at the lower end of the central suspension rod (200); the upper slider connection assembly adopts the slider moving assembly described in any one of claims 1 to 2, and the upper slider connection assembly is fixed on the moving beam (100) through a cross frame (3); When the upper slider (1) moves to the loading axis where the central suspension rod (200) is located, a limit block (300) provided at the lower end of the central suspension rod (200) is limit-connected to a slider adapter (4) connected to the upper slider (1).

4. The hook scale calibration device according to claim 3, characterized in that: A conical limiting slot (4.1) without a taper angle is provided at the top center of the slider adapter (4), and the limiting slot (4.1) extends to the side of the slider adapter (4) through a trapezoidal opening (4.2); when the upper slider (1) moves to the loading axis where the central suspension rod (200) is located, a limiting block (300) provided at the lower end of the central suspension rod (200) enters the limiting slot (4.1) through the trapezoidal opening (4.2) and is locked and connected with the limiting slot (4.1).

5. The hook scale calibration device according to claim 4, characterized in that: The center suspension rod (200) is provided with a limit block (300) whose end surface has a diameter that is 1 / 3 to 2 / 3 of the diameter of the top end surface of the pull head adapter (4).

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