Test tool for universal joint

Abstract

The utility model relates to the technical field of universal joints, in particular to a universal joint testing tool, which comprises a bottom frame and a top seat fixed at the top of the bottom frame, a fixed shaft is fixed at the center of the top seat, a movable track seat is rotatably sleeved on the fixed shaft, a fixed track groove is further arranged on the top seat along the radial direction, and the movable track seat is fixed on the fixed track groove. Sliding seats are arranged in the movable track seat and the fixed track groove in a sliding mode, the two sets of sliding seats are used for fixing two end shafts of the universal joint respectively, the sliding seat in the movable track seat is arranged on a first lead screw in a sleeving mode through a threaded hole, and the sliding seat in the fixed track groove is arranged on a second lead screw in a sleeving mode through a threaded hole; the distance between the two groups of sliding seats can be adaptively adjusted according to the overall length of the universal joint to be detected, so that the center of the universal joint can be quickly positioned, the distance between the two groups of sliding seats and the fixed shaft can be quickly adjusted by using the bidirectional transmission mechanism, and the installation efficiency of the universal joint is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joints, in particular to a testing tool for universal joints. Background Art

[0002] The universal joint is an auxiliary coupling for steering the output speed and torque of the drive shaft. When testing the universal joint's motion angle range, the universal joint needs to be installed on a test fixture that can adjust the angle.

[0003] As disclosed in the publication (announcement) No. CN218440302U, a test fixture for a universal joint fork preferably keeps the center of the universal joint between the left and right semicircular blocks when the universal joint is installed, so that the universal joint can be smoothly driven to rotate when the angle between the left and right semicircular blocks changes; however, the above scheme does not have a structure that can quickly install and position the universal joint, which affects the loading and unloading efficiency of the universal joint. Utility Model Content

[0004] The utility model aims at least to solve the problem of inconvenient installation and positioning of the universal joint in the prior art.

[0005] The present invention provides a universal joint test fixture, which is achieved by the following specific technical means: it includes a base frame and a top seat fixed on the top of the base frame, a fixed shaft is fixed at the center of the top seat, and a movable track seat is rotatably sleeved on the fixed shaft, and a fixed track groove is also radially opened on the top seat, and slide seats are slidably provided in the movable track seat and the fixed track groove, and two groups of the slide seats are respectively used to fix the two end shafts of the universal joint, a screw rod 1 is rotatably provided in the movable track seat, and a screw rod 2 is rotatably provided in the fixed track groove, the slide seat in the movable track seat is threadedly connected with the screw rod 1, and the slide seat in the fixed track groove is threadedly connected with the screw rod 2, and the spacing between the two groups of the slide seats is adjusted to correspond to the length of the universal joint by rotating the screw rod 1 and the screw rod 2, so that the center of the universal joint is located directly above the fixed shaft.

[0006] Optimal technical solution 1: A bidirectional transmission mechanism is provided on the bottom side of the top seat, and both ends of the bidirectional transmission mechanism are respectively connected to screw rod 1 and screw rod 2, and the bidirectional transmission mechanism is used to drive screw rod 1 and screw rod 2 to rotate synchronously.

[0007] Preferred technical solution two: The bidirectional transmission mechanism includes a transmission shaft rotatably arranged on the bottom side of the top seat, the middle part of the transmission shaft passes through the center of the top seat, and the two ends of the transmission shaft are respectively sleeved with gear one and gear two, and the gear one is intermittently meshed with gear three on screw rod one, and at the same time, the gear two is intermittently meshed with gear four on screw rod two. Before installing the universal joint, the movable track seat is first controlled to rotate around the fixed axis so that it remains in the same straight line with the fixed track groove. At this time, gear one is meshed with gear three, and gear two is meshed with gear four.

[0008] Preferred technical solution three: a vertical frame is fixed on the bottom side of the top seat, a mounting seat is slidably provided in the vertical frame, the transmission shaft rotates and passes through the mounting seat, and the height of the transmission shaft can be adjusted by sliding the mounting seat up and down in the vertical frame.

[0009] Preferred technical solution four: a spring is connected between the mounting seat and the end wall of the vertical frame.

[0010] Preferred technical solution five: the mounting seat is located directly below the center of the top seat, and the vertical axis fixed on the top of the mounting seat slides through the fixed axis. A protruding handle is fixed to the top of the vertical axis, and a limiting ring is fixed on the movable rail seat. The limiting ring is located above the protruding handle and the bottom wall contacts the top wall of the protruding handle pushed up by the spring. A notch is provided on the limiting ring. When the movable rail seat is rotated to be in the same straight line as the fixed rail groove, the notch moves to directly above the protruding handle. At this time, the upward thrust of the spring causes the protruding handle to pass through the notch, thereby causing the mounting seat to move up synchronously with the protruding handle.

[0011] The above structure enables this solution to have the following beneficial effects:

[0012] 1. The distance between the two sets of slides can be adaptively adjusted according to the overall length of the universal joint to be tested, so as to ensure that the center of the universal joint can be quickly located, and the two-way transmission mechanism can be used to quickly adjust the distance between the two sets of slides and the fixed shaft, thereby improving the efficiency of universal joint installation;

[0013] 2. Use springs, limit rings, cams, mounting seats and transmission shafts to ensure that gear one and gear three, gear two and gear four can be meshed only when the movable track seat rotates to be in the same straight line as the fixed track groove, thereby ensuring the synchronization of the rotation of screw rods one and two. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0016] Figure 2 This is the main view of this scheme;

[0017] Figure 3 This is a structural diagram of the bidirectional transmission mechanism of this scheme;

[0018] Figure 4 This is the exploded diagram of this solution.

[0019] Among them, 1. base frame, 2. top seat, 21. fixed track groove, 22. angle scale, 3. fixed shaft, 4. movable track seat, 5. slide seat, 6. screw one, 7. screw two, 8. two-way transmission mechanism, 81. transmission shaft, 82. gear one, 83. gear two, 84. gear three, 85. gear four, 86. vertical frame, 87. mounting seat, 88. crank handle, 89. spring, 810. vertical shaft, 811. protruding handle, 812. limiting ring, 813. notch, 9. connecting shaft, 10. clamping claw mechanism, 11. motor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 2 The universal joint test fixture comprises a base frame 1 and a top seat 2 fixed on the top of the base frame 1, a fixed shaft 3 is fixed at the center of the top seat 2, and a movable track seat 4 is rotatably sleeved on the fixed shaft 3, and a fixed track groove 21 is also radially provided on the top seat 2, and slide seats 5 are slidably provided in the movable track seat 4 and the fixed track groove 21, and at the same time, a connecting shaft 9 is rotatably provided on the two sets of slide seats 5, and a clamping mechanism 10 is fixed at the end of each set of connecting shaft 9, and the clamping mechanism 10, the two sets of clamping mechanisms 10 are located at the same height, and are respectively used to clamp and fix the two end shafts of the universal joint, and a motor 11 is fixed on one set of slide seats 5, and the motor 11 is connected to the connecting shaft 9 on the set of slide seats 5, and the motor 11 is used to drive the connecting shaft 9 to rotate, which can drive the universal joint to rotate in the swing angle test, and an angle scale 22 is provided on the circumferential side of the top seat 2, and the angle can be visually observed through the angle scale 22 when the movable track seat 4 rotates an angle;

[0022] A screw rod 1 6 is rotatably provided in the movable track seat 4, and a screw rod 2 7 is rotatably provided in the fixed track groove 21. The slide seat 5 in the movable track seat 4 is sleeved on the screw rod 1 6 through a threaded hole, and the slide seat 5 in the fixed track groove 21 is sleeved on the screw rod 2 7 through a threaded hole. The distance between the two groups of slide seats 5 is adjusted to correspond to the length of the universal joint by rotating the screw rod 1 6 and the screw rod 2 7, and the center of the universal joint is located directly above the fixed shaft 3; a two-way transmission mechanism 8 is provided on the bottom side of the top seat 2, and the two ends of the two-way transmission mechanism 8 are respectively connected to the screw rod 1 6 and the screw rod 2 7, and the two-way transmission mechanism 8 is used to drive the screw rod 1 6 and the screw rod 2 7 to rotate synchronously, thereby realizing the synchronous control of the distance between the two groups of slide seats 5 and the fixed shaft 3.

[0023] See also Figure 2-Figure 4, a test fixture for a universal joint, a bidirectional transmission mechanism 8 includes a transmission shaft 81 rotatably arranged on the bottom side of the top seat 2, the middle part of the transmission shaft 81 passes through the bottom side of the center of the top seat 2, and the two ends of the transmission shaft 81 are respectively sleeved with a gear 1 82 and a gear 2 83, and the gear 1 82 is intermittently meshed with a gear 3 84 sleeved on the end of the screw rod 1 6, and the gear 2 83 is intermittently meshed with a gear 4 85 sleeved on the end of the screw rod 2 7. Before installing the universal joint, first control the movable track seat 4 to rotate around the fixed shaft 3 so that it is kept in the same straight line with the fixed track groove 21, at this time, the gear 1 82 is meshed with the gear 3 84, and the gear 2 83 is meshed with the gear 4 85, and then the transmission shaft 81 can be rotated according to the length of the universal joint. The spacing between the two groups of slide seats 5 is adjusted to suit them; a vertical frame 86 is fixed to the bottom side of the top seat 2, and a mounting seat 87 is slidably provided in the vertical frame 86. The transmission shaft 81 rotates and passes through the mounting seat 87. The height of the transmission shaft 81 can be adjusted by sliding the mounting seat 87 up and down in the vertical frame 86, thereby controlling gear one 82 and gear two 83 to engage or disengage with gear three 84 and gear four 85 at the same time. A crank 88 is also installed at the end of the screw rod 2 7. When the transmission shaft 81 moves upward so that gear one 82 and gear three 84 are engaged, and gear two 83 is engaged with gear four 85, the screw rod two 7 can be driven to rotate by the crank 88, and then the screw rod one 6 can be rotated synchronously with the screw rod two 7 under the connection of the transmission shaft 81.

[0024] See also Figure 2-Figure 3 , a universal joint test fixture, a spring 89 is connected between the mounting seat 87 and the end wall of the vertical frame 86, and the spring 89 is used to realize the upward movement of the transmission shaft 81, thereby completing the meshing of the gear 1 82 and the gear 3 84, and the meshing of the gear 2 83 and the gear 4 85;

[0025] The mounting seat 87 is located directly below the center of the top seat 2. The vertical shaft 810 fixed on the top of the mounting seat 87 slides through the fixed shaft 3. A lug 811 is fixed to the top of the vertical shaft 810. At the same time, a limiting ring 812 is fixed on the movable track seat 4. The limiting ring 812 is located above the lug 811 and the bottom wall contacts the top wall of the lug 811 pushed up by the spring 89. A notch 813 is provided on the limiting ring 812. When the movable track seat 4 rotates to be on the same straight line as the fixed track groove 21, the notch 813 moves to directly above the lug 811. At this time, the upward thrust of the spring 89 causes the lug 811 to pass through the notch 813, so that the mounting seat 87 moves up synchronously with the lug 811, thereby completing the meshing of gear 1 82 and gear 3 84, and the meshing of gear 2 83 and gear 4 85.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal joint test fixture, comprising a base frame (1) and a top seat (2) fixed on the top of the base frame (1), characterized in that: A fixed shaft (3) is fixed at the center of the top seat (2), and a movable track seat (4) is rotatably sleeved on the fixed shaft (3), and a fixed track groove (21) is radially provided on the top seat (2), and slide seats (5) are slidably provided in both the movable track seat (4) and the fixed track groove (21), and the two groups of slide seats (5) are respectively used to fix the two end shafts of the universal joint, and a screw rod (6) is rotatably provided in the movable track seat (4), and a screw rod (6) is rotatably provided in the fixed track groove (21). A second screw rod (7) is provided, the slide seat (5) in the movable track seat (4) is sleeved on the first screw rod (6) through a threaded hole, and the slide seat (5) in the fixed track groove (21) is sleeved on the second screw rod (7) through a threaded hole; a bidirectional transmission mechanism (8) is provided on the bottom side of the top seat (2), and the two ends of the bidirectional transmission mechanism (8) are respectively connected to the first screw rod (6) and the second screw rod (7), and the bidirectional transmission mechanism (8) is used to drive the first screw rod (6) and the second screw rod (7) to rotate synchronously.

2. A universal joint testing tool according to claim 1, characterized in that: Angle scales (22) are provided on the circumference of the top seat (2).

3. A universal joint testing tool according to claim 1, characterized in that: The bidirectional transmission mechanism (8) comprises a transmission shaft (81) rotatably arranged on the bottom side of the top seat (2), the middle part of the transmission shaft (81) passes through the center of the top seat (2), and the two ends of the transmission shaft (81) are respectively sleeved with a gear 1 (82) and a gear 2 (83), the gear 1 (82) intermittently meshes with a gear 3 (84) sleeved on the end of the screw rod 1 (6), and the gear 2 (83) intermittently meshes with a gear 4 (85) sleeved on the end of the screw rod 2 (7).

4. A universal joint testing tool according to claim 3, characterized in that: A vertical frame (86) is fixed on the bottom side of the top seat (2), a mounting seat (87) is slidably provided in the vertical frame (86), the transmission shaft (81) rotates and passes through the mounting seat (87), and a spring (89) is connected between the mounting seat (87) and the end wall of the vertical frame (86).

5. A universal joint testing tool according to claim 4, characterized in that: The mounting seat (87) is located directly below the center of the top seat (2); a vertical shaft (810) fixed on the top of the mounting seat (87) slides through the fixed shaft (3); a protruding handle (811) is fixed on the top of the vertical shaft (810); and a limiting ring (812) is fixed on the movable track seat (4); the limiting ring (812) is located above the protruding handle (811) and the bottom wall of the limiting ring (812) contacts the top wall of the protruding handle (811) pushed upward by the spring (89); a notch (813) is provided on the limiting ring (812); when the movable track seat (4) rotates to be on the same straight line as the fixed track groove (21), the notch (813) moves to the top of the protruding handle (811), and at this time, the upward thrust of the spring (89) causes the protruding handle (811) to pass through the notch (813).

6. A universal joint testing tool according to claim 1, characterized in that: The end of the second screw rod (7) is also provided with a crank handle (88).

7. A universal joint testing tool according to claim 1, characterized in that: The two groups of slide seats (5) are both rotatably provided with connecting shafts (9), and the ends of each group of connecting shafts (9) are fixed with clamping claw mechanisms (10).

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