Pressure sensor welding tool
By designing a limiting structure for the clamp and upper clamping assembly, the problem of housing position displacement during the welding process of the gearbox pressure sensor was solved, achieving high-quality and efficient welding results and improving the welding quality and performance of the sensor.
Patent Information
- Application Number
- CN202520455969.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-17
AI Technical Summary
The existing welding fixture for gearbox pressure sensors cannot effectively limit the upper and lower housings, causing positional displacement during the welding process and affecting the welding quality.
A pressure sensor welding fixture was designed, including a clamp, a lower fixture, and an upper clamping assembly. The lower housing is limited by a first contour groove and a positioning groove, and the upper housing is clamped by the upper clamping assembly to ensure that the welding position is aligned and to prevent the housing from moving or rotating during the welding process.
This improved welding quality and efficiency, ensured the accuracy and stability of the welding position, reduced welding defects, and enhanced the overall performance of the sensor.
Smart Images
Figure CN223947174U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gearbox pressure sensor production technical field especially is pressure sensor welding frock. BACKGROUND
[0002] Gearbox pressure sensor is the key component in gearbox system. Gearbox pressure sensor includes upper shell and lower shell, and the upper shell and the lower shell need to be laser welded. For laser welding, the following requirements are as follows: 1. High-precision positioning system: due to small size and high precision requirements of the sensor. 2. Energy stability: the laser welding equipment should have good energy stability to ensure consistent energy output of each welding, so as to stabilize the welding quality and reduce the welding defects caused by energy fluctuation.
[0003] The existing frock does not limit the upper shell and the lower shell, so that the upper shell and the lower shell will be displaced during welding, thereby resulting in poor welding quality. UTILITY MODEL CONTENTS
[0004] Therefore, the utility model wants to solve the technical problem in prior art.
[0005] In order to solve the above technical problems, the utility model provides a pressure sensor welding frock, which comprises:
[0006] A clamp;
[0007] A lower frock is clamped in the clamp; a first profiling groove for placing the lower shell is arranged in the lower frock; a first positioning groove and a second positioning groove are arranged at the top of the side wall of the first profiling groove; the first positioning groove is used for limiting the first protrusion of the lower shell; the second positioning groove is used for limiting the second protrusion of the lower shell;
[0008] An upper pressing assembly comprises a pressing component and a pressure head connected to the bottom end of the pressing component; a second profiling groove for placing the upper shell is arranged at the bottom end of the pressure head; the pressing component moves downward to drive the pressure head to abut on the upper shell;
[0009] Wherein, the clamp drives the lower frock and the upper pressing assembly to rotate.
[0010] In an embodiment of the utility model, the application further comprises a pre-positioning piece, one end of the pre-positioning piece is provided with a third positioning groove; the second positioning groove and the third positioning groove are arranged in correspondence with each other; the third positioning groove is used for limiting the second protrusion of the lower shell and the third protrusion of the upper shell.
[0011] In an embodiment of the utility model, the application further comprises a fixing frame body; the pressing component comprises a power piece and an up-down moving rod; the power piece is connected with the up-down moving rod; the up-down moving rod is slidingly connected with the fixing frame body and rotates relative to the fixing frame body.
[0012] In one embodiment of the utility model, power piece includes elastic piece, elastic piece is set on up and down movement link, and elastic piece is located between fixed frame body and pressure head, elastic piece drives pressure head to press down lower casing.
[0013] In one embodiment of the utility model, the compression component further includes a guide sleeve and a bearing; the up and down movement link is slidingly connected to the fixed frame body through the guide sleeve; and the up and down movement link is rotatably connected to the fixed frame body through the bearing.
[0014] In one embodiment of the utility model, the top end of the up and down movement link is provided with a puller having a larger diameter than the up and down movement link.
[0015] In one embodiment of the utility model, the puller is moved upward to a target position, and the puller is fixed to the fixed frame body.
[0016] In one embodiment of the utility model, the pressure head is detachably connected to the up and down movement link.
[0017] In one embodiment of the utility model, the top of the sidewall of the first profiling groove is provided with at least one avoiding groove.
[0018] In one embodiment of the utility model, the edge of the pressure head in contact with the upper casing is chamfered.
[0019] The above technical solution of the utility model has the following advantages compared with the prior art:
[0020] The pressure sensor welding tool disclosed by the utility model limits the lower casing up and down through the first profiling groove, and then limits the first protrusion through the first positioning groove to avoid the rotation of the lower casing; the upper casing is placed on the lower casing to ensure that the second protrusion and the third protrusion are aligned, thereby ensuring the welding position of the lower casing and the upper casing. Then the upper casing is compressed through the upper compression assembly to avoid the up and down movement and rotation of the lower casing and the upper casing during the welding process, thereby ensuring the welding quality. Therefore, the embodiment can improve the welding quality and welding efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to the specific embodiments of the utility model and in combination with the drawings, wherein:
[0022] Figure 1 is a structure schematic view of a pressure sensor welding tool in the preferred embodiment of the utility model;
[0023] Figure 2 is Figure 1 the enlarged view of A of
[0024] Figure 3 isFigure 1 a sectional view of the pressure sensor welding tool of the prior art;
[0025] Figure 4 is Figure 3 an enlarged view of B of the prior art;
[0026] Description of the drawings: 100, clamp;
[0027] 200, lower tool; 210, first profiling groove; 220, first positioning groove; 230, second positioning groove; 240, avoiding groove;
[0028] 300, lower shell; 310, first protrusion; 320, second protrusion;
[0029] 400, upper pressing assembly; 410, pressure head; 411, second profiling groove; 412, counterbore; 420, up-down moving rod; 430, elastic piece; 440, guide sleeve; 450, bearing; 460, pull head; 470, chamfering treatment;
[0030] 500, upper shell; 510, third protrusion;
[0031] 600, pre-positioning piece; 610, third positioning groove;
[0032] 700, fixed frame body; 710, connecting plate; 711, strip-shaped hole. DETAILED DESCRIPTION
[0033] The utility model will be further described below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the utility model and can be implemented, but the embodiments are not as the limitation of the utility model.
[0034] It should be noted that the outer wall of the lower shell is provided with the first protrusion and the second protrusion; the outer wall of the upper shell is provided with the third protrusion. The lower shell and the upper shell need to be welded in two positions, one of which is to weld a circle on the contact surface of the lower shell and the upper shell, and the other is to align the second protrusion and the third protrusion vertically, and then weld the connection between the second protrusion and the third protrusion. Therefore, the prior art cannot guarantee the welding position.
[0035] Referring to Figures 1-4 The utility model discloses a pressure sensor welding tool, comprising:
[0036] The clamp 100 is, for example, an electric three-angle claw;
[0037] The lower tooling 200 is clamped in the clamp 100; the lower tooling 200 is provided with a first profiling groove 210 for placing the lower shell 300; the top of the sidewall of the first profiling groove 210 is provided with a first positioning groove 220 and a second positioning groove 230; the first positioning groove 220 is used for limiting the first protrusion 310 of the lower shell 300; the second positioning groove 230 is used for limiting the second protrusion 320 of the lower shell 300;
[0038] The upper pressing assembly 400 includes a pressing component and a pressing head 410 connected to the bottom end of the pressing component; the bottom end of the pressing head 410 is provided with a second profiling groove 411 for placing the upper shell 500; the pressing component moves downward to drive the pressing head 410 to abut against the upper shell 500;
[0039] The clamp 100 drives the lower tooling 200 and the upper pressing assembly 400 to rotate, so as to facilitate the welding equipment to weld a circle at the connection position of the upper shell 500 and the lower shell 300.
[0040] Specifically, the first profiling groove 210 limits the upper and lower positions of the lower shell 300, and then the first positioning groove 220 limits the first protrusion 310 to avoid rotation of the lower shell 300; the upper shell 500 is placed on the lower shell 300, ensuring that the second protrusion 320 and the third protrusion 510 are aligned, thereby ensuring the welding position of the lower shell 300 and the upper shell 500; then the upper pressing assembly 400 is used to press the upper shell 500, avoiding the upper and lower movement and rotation of the lower shell 300 and the upper shell 500 during welding, thereby ensuring the welding quality. Therefore, the embodiment can improve the welding quality and efficiency.
[0041] Further, the application also includes a pre-positioning piece 600, one end of the pre-positioning piece 600 is provided with a third positioning groove 610; the second positioning groove 230 and the third positioning groove 610 are arranged in an upper and lower correspondence; the second protrusion 320 exposes the upper surface of the second positioning groove 230, and the third positioning groove 610 is used for limiting the second protrusion 320 of the lower shell 300 and the third protrusion 510 of the upper shell 500. Specifically, during actual welding, first, the lower shell 300 is placed in the first profiling groove 210 and the first protrusion 310 is ensured to be located in the first positioning groove 220; then the upper shell 500 is placed on the lower shell 300, and the upper shell 500 is rotated so that the third protrusion 510 is rotated to the vicinity of the second protrusion 320, until the second protrusion 320 and the third protrusion 510 are both located in the third positioning groove 610; then the upper pressing assembly 400 is started to press the upper shell 500 and the lower shell 300, at this time the pre-positioning piece 600 can be removed. Therefore, the embodiment can quickly align the second protrusion 320 and the third protrusion 510 through the pre-positioning piece 600, thereby ensuring the welding position and improving the welding quality.
[0042] Further, the application further comprises a fixed frame body 700; the pressing component comprises a power element and an up-down moving rod 420; the power element is connected with the up-down moving rod 420, the up-down moving rod 420 is slidingly connected with the fixed frame body 700 and rotates relative to the fixed frame body 700. Specifically, the power element drives the up-down moving rod 420 to move up and down to realize the pressing of the upper shell. The structure of the embodiment is simple, convenient and fast to operate, and the manufacturing cost is low.
[0043] Further, the power element comprises an elastic element 430 (for example, a spring); the elastic element 430 is sleeved on the up-down moving rod 420, and the elastic element 430 is located between the fixed frame body 700 and the pressing head 410; the elastic element 430 drives the pressing head 410 to press the lower shell 300 downward. Pulling the up-down moving rod 420 upward makes the elastic element 430 compressed, so that the elastic element 430 exerts pressure on the upper shell 500 in the state of restoring to freedom. Specifically, the embodiment provides the pressing force through the deformation of the elastic element 430, without the power part, reducing the investment of the equipment. The cost is reduced.
[0044] Further, the pressing component further comprises a guide sleeve 440 and a bearing 450; the up-down moving rod 420 is slidingly connected with the fixed frame body 700 through the guide sleeve 440; the up-down moving rod 420 is rotatably connected with the fixed frame body 700 through the bearing 450.
[0045] Further, the top end of the up-down moving rod 420 is provided with a pull head 460 which is larger in diameter than the up-down moving rod 420. Specifically, the embodiment is provided with the pull head 460, which is convenient for the operator to hold and move up and down.
[0046] Further, the pull head 460 is moved upward to a target position, and the pull head 460 is fixed with the fixed frame body 700. In some possible embodiments, the pull head 460 is in a long strip structure. The upper portion of the fixed frame body 700 is connected with a connecting plate 710 which is parallel to the top surface of the fixed frame body 700, and the connecting plate 710 is provided with a strip-shaped hole 711. The pull head 460 passes through the strip-shaped hole 711, and the pull head 460 is arranged on the side of the strip-shaped hole 711 by rotating the pull head 460. Specifically, the detachable connection between the pull head 460 and the fixed frame body 700 can be quickly realized from the embodiment. In this way, when the welding of the previous workpiece is completed, the operator pulls the pull head 460 upward until the pull head 460 passes through the strip-shaped hole 711, and then rotates the pull head 460 to arrange the pull head 460 on the connecting plate 710 so that the pressing head 410 is away from the upper shell 500, which is convenient for taking out the workpiece which has been welded and putting in the next workpiece. After the next workpiece is put in, the pull head 460 is rotated to pass through the long strip hole and move downward, so that the workpiece is pressed by the pressing head 410. As can be seen, the embodiment can move the upper pressing assembly 400 upward and be fixedly connected with the fixed frame body 700 when the workpiece is replaced, so that the operator does not need to hold the upper pressing assembly 400 all the time, which is convenient for operation.
[0047] Further, the pressure head 410 is detachably connected with the up-down moving rod 420. In some embodiments, the pressure head 410 is connected with the up-down moving rod 420 through a screw. For example, the pressure head 410 is provided with a countersunk hole 412 communicating with the second profiling groove 411, and the bottom end of the up-down moving rod 420 is provided with a threaded hole, and the countersunk hole 412 and the threaded hole are connected through a thread. Specifically, the embodiment facilitates the alignment of the pressure head 410 for separate replacement after damage, thereby reducing maintenance costs.
[0048] Further, the top of the side wall of the first profiling groove 210 is provided with at least one avoiding groove 240. Specifically, the avoiding groove 240 is provided to facilitate the placement of the lower shell 300 into the first profiling groove 210, and to facilitate the entry of a welding device, thereby welding the contact surface of the upper shell 500 and the lower shell 300.
[0049] Further, the edge of the pressure head 410 in contact with the upper shell 500 is chamfered 470. For example, a 45° bevel chamfer. For another example, a round chamfer. Specifically, the chamfering 470 of the embodiment can avoid the direct contact of the right angle at the outer circle of the pressure head 410 with the upper shell 500, thereby causing scratches, damage, etc. to the upper shell 500.
[0050] When welding the gearbox pressure sensor according to the present application, the following controls need to be performed:
[0051] Welding seam integrity: The welding seam is continuous and uniform, without defects such as cracks, pores, and incomplete penetration, to avoid problems such as leakage and unstable signal transmission of the sensor during use due to welding seam defects.
[0052] Small heat-affected zone: The heat-affected zone needs to be strictly controlled to prevent the sensitive elements of the sensor from changing in performance due to heat, and to ensure that the precision, sensitivity, and other indicators of the sensor are not affected.
[0053] Welding strength: The welding site needs to have sufficient strength to withstand mechanical actions such as pressure and vibration during the operation of the gearbox, to ensure that the connection between the sensor and the gearbox is firm and reliable.
[0054] Sealing: For sensors that need to be sealed, such as sensors used to measure the oil pressure of the gearbox, good sealing needs to be ensured after welding to prevent hydraulic oil from leaking.
[0055] Obviously, the above embodiments are merely examples for clear illustration, and are not limiting to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.
Claims
1. A pressure sensor welding fixture, characterized by: The utility model relates to a shell pressing device, including: A clamp; A lower tooling clamped in the clamp; A first profiling groove for placing a lower shell is arranged in the lower tooling; The top of the sidewall of the first profiling groove is provided with a first positioning groove and a second positioning groove; the first positioning groove is used for limiting a first protrusion of the lower shell; the second positioning groove is used for limiting a second protrusion of the lower shell; An upper pressing assembly, including a pressing part and a pressing head connected to the bottom end of the pressing part; the bottom end of the pressing head is provided with a second profiling groove for placing an upper shell; the pressing part moves downward to drive the pressing head to abut on the upper shell; Wherein, the clamp drives the lower tooling and the upper pressing assembly to rotate.
2. The pressure sensor welding fixture of claim 1, wherein: Further including a pre-positioning piece, one end of the pre-positioning piece is provided with a third positioning groove; the second positioning groove and the third positioning groove are arranged in upper and lower correspondence; the third positioning groove is used for limiting the second protrusion of the lower shell and a third protrusion of the upper shell.
3. The pressure sensor welding fixture of claim 1, wherein: Further including a fixed frame body; the pressing part includes a power piece and an up-down moving rod; the power piece is connected with the up-down moving rod, and the up-down moving rod is slidingly connected with the fixed frame body and rotates relative to the fixed frame body.
4. The pressure sensor welding fixture of claim 3, wherein: The power piece includes an elastic piece; the elastic piece is sleeved on the up-down moving rod, and the elastic piece is located between the fixed frame body and the pressing head; the elastic piece drives the pressing head to press the lower shell downward.
5. The pressure sensor welding fixture of claim 3, wherein: The pressing part further includes a guide sleeve and a bearing; the up-down moving rod is slidingly connected with the fixed frame body through the guide sleeve; the up-down moving rod is rotatably connected with the fixed frame body through the bearing.
6. The pressure sensor welding fixture of claim 3, wherein: The top end of the up-down moving rod is provided with a pull head larger than the diameter of the up-down moving rod.
7. The pressure sensor welding fixture of claim 6, wherein: The pull head moves upward to a target position, and the pull head is fixed with the fixed frame body.
8. The pressure sensor welding fixture of claim 3, wherein: The pressing head is detachably connected with the up-down moving rod.
9. The pressure sensor welding fixture of claim 1, wherein: The top of the sidewall of the first profiling groove is provided with at least one avoiding groove.
10. The pressure sensor welding fixture of claim 1, wherein: The edge of the pressing head in contact with the upper shell is chamfered.