Long spring limit compression experiment device

Abstract

The utility model provides a long spring limit compression experiment device. The long spring limit compression experiment device comprises a rack, an air cylinder, a main rod, an extension rod, a bolt, a compression auxiliary sleeve and a compression locking sleeve, the rack is provided with a workbench and a through hole penetrating through the workbench, the air cylinder is fixed to the upper portion of the rack, and the moving end of the air cylinder faces the through hole. The top end of the main rod can be detachably and fixedly connected with the moving end of the air cylinder, the top end of the extension rod can be detachably and fixedly connected with the bottom end of the main rod, the extension rod can penetrate through the through hole, an insertion hole used for being matched with the plug pin is formed in the lower portion of the main rod, and the plug pin can be inserted into the insertion hole and penetrate through the main rod in the radial direction; the extension rod can be sleeved with the compression auxiliary sleeve, the compression auxiliary sleeve is of a hollow structure, the two ends of the compression auxiliary sleeve are open, and the compression locking sleeve can be detachably and fixedly connected with the bottom end of the main rod. According to the long spring compressing device, the long spring can be efficiently and safely compressed to a limit state and stably locked under the condition that a coating of the long spring is prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to a spring test device, in particular to a long spring limit compression test device, and belongs to the technical field of automobile parts manufacturing. Background Art

[0002] With the increasing application of chromium-free zinc-aluminum coating technology, customers have put forward higher requirements for the corrosion protection of automobile tailgate spring products. Due to the comprehensive consideration of cost control, durability and accessory costs, the solution of using zinc-aluminum coating for corrosion protection of tailgate springs has been adopted by more and more automobile parts manufacturers, making the application of zinc-aluminum coating in the tailgate spring market increasingly popular and with broad prospects.

[0003] After the car tailgate spring is treated with zinc-aluminum coating, it is necessary to verify its anti-corrosion ability. The conventional experimental scheme is to conduct a salt spray performance test in a natural elongation state, but the conventional scheme cannot fully simulate the actual working conditions of the product. The loading state of the car tailgate spring is an extreme compression state, and the car tailgate spring is only in an elongated state when the tailgate is opened. Therefore, the more ideal simulation test condition is to perform extreme compression on the long spring (i.e., the car tailgate spring) before the salt spray test and lock the compressed state before conducting the experiment. In the prior art, there is still a lack of effective devices for extreme compression of the long spring without damaging its coating. Utility Model Content

[0004] Based on the above background, the purpose of the utility model is to provide a long spring limit compression test device, which can efficiently and safely compress the long spring to the limit state and firmly lock it without damaging the long spring coating.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0006] A long spring limit compression test device comprises a frame, a cylinder, a main rod, an extension rod, a latch, a compression auxiliary sleeve and a compression locking sleeve; the frame is provided with a workbench and a through hole penetrating the workbench, the cylinder is fixed to the upper part of the frame, and the movable end of the cylinder faces the through hole, and the central axis of the movable end of the cylinder is in the same straight line as the central axis of the through hole; the top end of the main rod can be detachably fixedly connected to the movable end of the cylinder, the top end of the extension rod can be detachably fixedly connected to the bottom end of the main rod, the extension rod can pass through the through hole, the lower part of the main rod is provided with a socket for matching the latch, the latch can be inserted into the socket and radially penetrate the main rod; the compression auxiliary sleeve can be sleeved on the outside of the extension rod, the compression auxiliary sleeve is a hollow structure with openings at both ends, and the compression locking sleeve can be detachably fixedly connected to the bottom end of the main rod.

[0007] Preferably, the main rod is provided with a blocking portion adjacent to its top end, the blocking portion at least partially protruding from the outer wall surface of the main rod.

[0008] Preferably, the top end of the extension rod is provided with one of the stud and the screw hole, and the bottom end of the main rod is provided with the other of the stud and the screw hole, and the top end of the extension rod and the bottom end of the main rod are detachably fixedly connected by the stud and the screw hole.

[0009] Preferably, the outer diameter of the extension rod is the same as the outer diameter of the main rod.

[0010] Preferably, the outer diameter of the bottom end of the compression auxiliary sleeve is larger than the outer diameter of the top end thereof.

[0011] Preferably, an auxiliary avoidance groove is provided on the top outer wall of the compression auxiliary sleeve, the notch of the auxiliary avoidance groove is flush with the top end surface of the compression auxiliary sleeve, and the bottom position of the auxiliary avoidance groove is lower than the top end surface of the compression auxiliary sleeve.

[0012] Preferably, the compression locking sleeve is a hollow structure, with an open top and a closed bottom.

[0013] Preferably, a locking avoidance groove is provided on the top outer wall of the compression locking sleeve, the notch of the locking avoidance groove is flush with the top end surface of the compression locking sleeve, and the bottom position of the locking avoidance groove is lower than the top end surface of the locking auxiliary sleeve.

[0014] Preferably, a fastening hole and a fastener are provided at the bottom end of the compression locking sleeve, and the bottom end of the compression locking sleeve can be detachably fixedly connected to the bottom end of the main rod through the fastener and the fastening hole.

[0015] Preferably, the inner diameter of the compression auxiliary sleeve is the same as the inner diameter of the compression locking sleeve.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The utility model discloses a long spring limit compression experimental device, which can efficiently and safely load and compress the long spring, and is easy to assemble and disassemble. Through the main rod, the extension rod and the compression auxiliary sleeve, the long spring can be safely sleeved on the outside of the main rod and the extension rod for compression operation, and damage to the surface coating of the long spring can be avoided. After the compression is completed, the compression state of the long spring is locked by a pin penetrating the main rod to form a first layer of limit insurance, and then the extension rod is removed, and the compression locking sleeve is fixed to the bottom end of the main rod to form a second layer of limit insurance, so that the limit state of the long spring is firmly locked for a long time, so as to carry out subsequent experimental operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the frame and the cylinder in the utility model;

[0020] Figure 2 It is a structural schematic diagram of the extension rod and the compression auxiliary sleeve in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the main rod, the latch pin and the compression locking sleeve in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the long spring limit compression test device of the utility model during pre-compression operation;

[0023] Figure 5 It is a structural schematic diagram of the long spring limit compression test device of the utility model during compression operation;

[0024] Figure 6 It is a structural schematic diagram of the long spring of the utility model in an extreme compression state.

[0025] In the figure: 1, frame; 2, cylinder; 3, main rod; 4, extension rod; 5, latch; 6, compression auxiliary sleeve; 7, compression locking sleeve; 101, workbench; 102, through hole; 301, blocking part; 302, plug hole; 303, screw hole; 401, stud; 601, auxiliary avoidance groove; 701, locking avoidance groove; 702, fastening hole; 703, fastener. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further described in detail below through specific embodiments and in combination with the accompanying drawings. It should be understood that the implementation of the utility model is not limited to the following embodiments, and any form of modification and / or change made to the utility model will fall within the protection scope of the utility model.

[0027] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the field. The methods in the following embodiments, unless otherwise specified, are conventional methods in the field. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0028] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may also be implemented by those skilled in the art without these specific details.

[0029] like Figure 1-3 As shown, an embodiment of the utility model discloses a long spring limit compression test device, including a frame 1, a cylinder 2, a main rod 3, an extension rod 4, a latch 5, a compression auxiliary sleeve 6 and a compression locking sleeve 7.

[0030] The frame 1 is provided with a workbench 101 and a through hole 102 penetrating the workbench 101 , the cylinder 2 is fixed to the upper part of the frame 1 , and the moving end of the cylinder 2 faces the through hole 102 , and the central axis of the moving end of the cylinder 2 is in the same straight line as the central axis of the through hole 102 .

[0031] The top end of the main rod 3 can be detachably fixedly connected to the movable end of the cylinder 2, the top end of the extension rod 4 can be detachably fixedly connected to the bottom end of the main rod 3, and the extension rod 4 can pass through the through hole 102. Specifically, in order to form a stable blockage for the top end of the long spring when the long spring is installed, the main rod 3 is provided with a blocking portion 301 protruding from the outer wall surface of the main rod 3 at a position adjacent to its top end. In this embodiment, the blocking portion 301 is annularly surrounding the outer wall surface of the main rod 3. Of course, the blocking portion 301 can also partially protrude from the outer wall surface of the main rod 3. Specifically, in order to facilitate the disassembly and assembly of the extension rod 4 and the main rod 3, a stud 401 is provided at the top end of the extension rod 4, and a screw hole 303 is provided at the bottom end of the main rod 3. The top end of the extension rod 4 and the bottom end of the main rod 3 are matched through the threads of the stud 401 and the screw hole 303, thereby forming a detachable fixed connection.

[0032] The lower part of the main rod 3 is provided with a socket 302 for cooperating with the pin 5. The pin 5 can be inserted into the socket 302 and radially penetrate the main rod 3. The opening position of the socket 302 is determined according to the straight-line distance between the moving end of the cylinder 2 and the workbench 101, the length of the main rod 3, the natural state length and the compressed state length of the long spring.

[0033] The compression auxiliary sleeve 6 can be sleeved on the outside of the extension rod 4. The compression auxiliary sleeve 6 is a hollow structure with openings at both ends. Specifically, in order to ensure the connection stability between the compression auxiliary sleeve 6 and the workbench 101 during the compression operation, the outer diameter of the bottom end of the compression auxiliary sleeve 6 is larger than the outer diameter of the top end. In addition, in order to facilitate the insertion of the pin 5 into the socket 302 during the compression operation, an auxiliary avoidance groove 601 is provided on the top outer wall of the compression auxiliary sleeve 6. The notch of the auxiliary avoidance groove 601 is flush with the top end face of the compression auxiliary sleeve 6, and the bottom position of the auxiliary avoidance groove 601 is lower than the top end face of the compression auxiliary sleeve 6.

[0034] The compression locking sleeve 7 can be detachably fixedly connected to the bottom end of the main rod 3. The compression locking sleeve 7 is a hollow structure, and the top end of the compression locking sleeve 7 is open and the bottom end is closed. Specifically, in order to facilitate the insertion of the pin 5 into the jack 302 during the compression operation, a locking avoidance groove 701 is provided on the top outer wall of the compression locking sleeve 7, and the notch of the locking avoidance groove 701 is flush with the top end face of the compression locking sleeve 7, and the bottom position of the locking avoidance groove 701 is lower than the top end face of the locking auxiliary sleeve. In addition, in order to facilitate the disassembly and assembly of the compression locking sleeve 7 and the main rod 3, a fastening hole 702 and a fastener 703 are provided at the bottom end of the compression locking sleeve 7, and the bottom end of the compression locking sleeve 7 can be detachably fixedly connected to the bottom end of the main rod 3 through the fastener 703 and the fastening hole 702. Among them, the fastener 703 is a fastening bolt.

[0035] Specifically, in order to facilitate processing and ensure the convenience of loading a long spring, the outer diameter of the extension rod 4 is the same as the outer diameter of the main rod 3. In addition, the inner diameter of the compression auxiliary sleeve 6 is the same as the inner diameter of the compression locking sleeve 7, and matches the inner diameter of the through hole 102 of the workbench 101. A clearance fit is formed between the main rod 3, the extension rod 4, the compression auxiliary sleeve 6, the compression locking sleeve 7, and the through hole 102 of the workbench 101.

[0036] The working principle of the long spring limit compression test device is that when in use, firstly thread the bottom end of the main rod 3 and the top end of the extension rod 4, then sleeve the long spring in the natural state on the outside of the main rod 3 and the extension rod 4, and then sleeve the compression auxiliary sleeve 6 on the extension rod 4. At this time, the compression auxiliary sleeve 6 is located near the bottom end of the extension rod 4, and the bottom end of the extension rod 4 extends out of the compression auxiliary sleeve 6. Connect the top end of the main rod 3 to the moving end of the cylinder 2, and make the bottom end of the extension rod 4 extend into the through hole 102, and the bottom end of the compression auxiliary sleeve 6 abuts against the surface of the workbench 101. At this time, Figure 4 As shown, the moving end of the cylinder 2, the main rod 3, the extension rod 4, the compression auxiliary sleeve 6 and the through hole 102 of the workbench 101 are coaxial. When the cylinder 2 is started, the moving end of the cylinder 2 is pressed downward, the main rod 3 and the extension rod 4 move downward relative to the compression auxiliary sleeve 6, the blocking portion 301 of the main rod 3 drives the top of the long spring to move downward, and the top end surface of the compression auxiliary sleeve 6 blocks the bottom of the long spring, so that the long spring is compressed, maintaining the power of the cylinder 2 until the long spring is compressed to the limit, at which time the socket 302 of the main rod 3 is located at the position corresponding to the auxiliary avoidance groove 601 of the compression auxiliary sleeve 6. Figure 5As shown, the pin 5 is inserted into the socket 302, replacing the top end face of the compression auxiliary sleeve 6 to form a blockage on the bottom end of the long spring, forming a first layer of limit insurance, thereby maintaining the long spring in an extreme compression state. The extension rod 4 is rotated and unscrewed to separate the extension rod 4 from the main rod 3, and the extension rod 4 can be removed from the bottom of the through hole 102, and the cylinder 2 is reset. The whole formed by the long spring in the extreme compression state, the main rod 3 and the pin 5 is taken out, and then the compression locking sleeve 7 is fixed to the bottom end of the main rod 3 to form a second layer of limit insurance to block the bottom end of the long spring. Finally, the long spring in a stable extreme compression state is as shown in FIG. Figure 6 shown.

[0037] Therefore, the long spring limit compression experimental device can efficiently and safely load and compress the long spring, and is easy to disassemble and assemble. Through the main rod 3, the extension rod 4 and the compression auxiliary sleeve 6, the long spring can be safely sleeved on the outside of the main rod 3 and the extension rod 4 for compression operation, and damage to the surface coating of the long spring can be avoided. After the compression is completed, the compression state of the long spring is locked by passing the pin 5 through the main rod 3 to form a first layer of limit insurance. After that, the extension rod 4 is removed, and the compression locking sleeve 7 is fixed to the bottom end of the main rod 3 to form a second layer of limit insurance, thereby locking the limit state of the long spring for a long time and stably for subsequent experimental operations.

[0038] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A long spring limit compression test device, characterized in that: The long spring limit compression test device comprises a frame (1), a cylinder (2), a main rod (3), an extension rod (4), a latch (5), a compression auxiliary sleeve (6) and a compression locking sleeve (7); the frame (1) is provided with a workbench (101) and a through hole (102) penetrating the workbench (101); the cylinder (2) is fixed to the upper part of the frame (1), and the moving end of the cylinder (2) faces the through hole (102), and the central axis of the moving end of the cylinder (2) and the central axis of the through hole (102) are located in the same straight line; the top end of the main rod (3) can be aligned with the moving end of the cylinder (2) The top end of the extension rod (4) can be detachably fixedly connected to the bottom end of the main rod (3); the extension rod (4) can pass through the through hole (102); the lower part of the main rod (3) is provided with a socket (302) for cooperating with the plug (5); the plug (5) can be inserted into the socket (302) and radially pass through the main rod (3); the compression auxiliary sleeve (6) can be sleeved on the outside of the extension rod (4); the compression auxiliary sleeve (6) is a hollow structure with openings at both ends; the compression locking sleeve (7) can be detachably fixedly connected to the bottom end of the main rod (3).

2. A long spring limit compression test device according to claim 1, characterized in that: The main rod (3) is provided with a blocking portion (301) at a position adjacent to the top end thereof, the blocking portion (301) at least partially protruding from the outer wall surface of the main rod (3).

3. A long spring limit compression test device according to claim 1, characterized in that: The top end of the extension rod (4) is provided with one of the stud (401) and the screw hole (303), and the bottom end of the main rod (3) is provided with the other of the stud (401) and the screw hole (303). The top end of the extension rod (4) and the bottom end of the main rod (3) are detachably fixedly connected via the stud (401) and the screw hole (303).

4. A long spring limit compression test device according to claim 1, characterized in that: The outer diameter of the extension rod (4) is the same as the outer diameter of the main rod (3).

5. The long spring limit compression test device according to claim 1, characterized in that: The outer diameter of the bottom end of the compression auxiliary sleeve (6) is larger than the outer diameter of the top end.

6. The long spring limit compression test device according to claim 1, characterized in that: The top outer wall of the compression auxiliary sleeve (6) is provided with an auxiliary avoidance groove (601), the notch of the auxiliary avoidance groove (601) is flush with the top end surface of the compression auxiliary sleeve (6), and the bottom position of the auxiliary avoidance groove (601) is lower than the top end surface of the compression auxiliary sleeve (6).

7. The long spring limit compression test device according to claim 1, characterized in that: The compression locking sleeve (7) is a hollow structure, with an open top end and a closed bottom end.

8. A long spring limit compression test device according to claim 7, characterized in that: The top outer wall of the compression locking sleeve (7) is provided with a locking avoidance groove (701), the notch of the locking avoidance groove (701) is flush with the top end surface of the compression locking sleeve (7), and the bottom position of the locking avoidance groove (701) is lower than the top end surface of the locking auxiliary sleeve.

9. The long spring limit compression test device according to claim 7, characterized in that: The bottom end of the compression locking sleeve (7) is provided with a fastening hole (702) and a fastener (703), and the bottom end of the compression locking sleeve (7) can be detachably fixedly connected to the bottom end of the main rod (3) through the fastener (703) and the fastening hole (702).

10. The long spring limit compression test device according to claim 1, characterized in that: The inner diameter of the compression auxiliary sleeve (6) is the same as the inner diameter of the compression locking sleeve (7).

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