Adjusting screw testing tool

Abstract

The invention discloses an adjusting screw rod testing tool, which comprises a seat stand body, a locking connection body and a locking head, and the locking connection body is arranged at the front end part of the seat stand body; the lock attachment connecting body comprises a main driving piece located on the upper portion, a sleeve piece and a bit rod piece, the main driving piece is located above the sleeve piece and connected with the top of the bit rod piece, the bit rod piece penetrates through the position of a middle center shaft where the sleeve piece is located, and the bit rod piece is controlled by the main driving piece to rotate along the axis center; a connecting pipe fitting is arranged at the lower end part where the sleeve piece is located, and the sleeve piece is connected with a locking head through the connecting pipe fitting; through the sleeve lock arranged on the lock attaching head, matching and fixing of the positions of the lock screws of different models are realized, the torsion change of the positions of the lock screws is synchronously fed back, and the test is completed. Through the device, the screw rod is effectively fixed, the torsion measurement is synchronously completed, the requirement for locking screw rods of various models and sizes is met, and the locking efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of screw adjustment equipment, and in particular relates to a screw adjustment testing tool. Background Art

[0002] At present, screw adjustment test fixtures are widely used in manufacturing and assembly industries. With the continuous development of automation and precision manufacturing, the market demand for efficient and accurate screw adjustment test fixtures is also increasing. The manufacturing industry has higher and higher requirements for product quality. The screw adjustment test fixture can effectively ensure the tightening quality of the screw, thereby improving the reliability of the product. More and more screw adjustment test fixtures are equipped with intelligent control systems, which can realize automatic detection and data recording.

[0003] In the Chinese patent application announcement number CN202022918998.7, a screw cycle testing device for a screw rod is disclosed, which includes a base, a load plate is fixedly connected to one side of the top of the base, an adjustment frame is fixedly connected to one side of the load plate, and a notch is opened at the bottom of the adjustment frame. By utilizing the adjustable function of the adjustment frame and the movable function of the clamping frame, the clamping detection work of screw rods of different sizes and specifications is realized.

[0004] However, in this device, a similar adjustment frame structure is used while locking the screw. Although it can achieve clamping of different sizes, its clamping force is limited, making it difficult to achieve locking operations. The measured torque force is also limited, and it is difficult to feedback its torque. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a screw adjustment test fixture to solve the above-mentioned technical problems existing in the prior art.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A screw adjustment test tool, comprising a base body, a locking connector, and a locking head.

[0008] A locking connector is provided at the front end portion of the seat body;

[0009] The locking connection body includes a main driving member, a sleeve member, and a screwdriver bit rod member located at the upper part. The main driving member is located above the sleeve member and is connected to the top of the screwdriver bit rod member. The screwdriver bit rod member passes through the central axis position of the sleeve member. The main driving member controls the screwdriver bit rod member to rotate along the center of the axis.

[0010] The lower end portion of the sleeve member is provided with a connecting pipe member, which is connected to the locking head through the connecting pipe member;

[0011] By means of the sleeve lock arranged on the locking head, the positions of the lock screws of different models can be matched and fixed, and the torque change of the lock screw position can be synchronously fed back to complete the test.

[0012] Furthermore, a sliding block is provided along the vertical direction on the front end surface of the seat body, which is connected to the locking connector through the sliding block, and the locking connector can slide in the vertical direction synchronously.

[0013] Furthermore, an auxiliary driving component is disposed in the seat body, and the auxiliary driving component is used to enable the locking connection body to slide vertically along the up-and-down direction of the slider as a whole.

[0014] Furthermore, a plurality of groups of limit assemblies are arranged in the middle through hole where the sleeve is located, and the outer diameter of the bit rod is limited by the limit assemblies, so that the bit rod is located at the central axis position in the middle of the sleeve and realizes self-rotation synchronously.

[0015] Furthermore, the main driving member includes a rotation driving part and a lifting driving part, and the rotation driving part is used to realize the self-rotation movement of the screwdriver bit rod in the sleeve member in the direction of the central axis;

[0016] The lifting drive unit realizes the up and down position adjustment of the screwdriver bit rod in the direction of the central axis.

[0017] Further, the inner wall where the connecting pipe is located is sleeved with a first return spring member, the upper end of the first return spring member is in contact with the bottom of the sleeve member, and a connecting block is provided at the lower end of the first return spring member, and a first protrusion is provided at the inner central axis position of the lower edge where the connecting pipe is located, and two adjacent groups of the first protrusions are distributed at equal intervals to form a load-bearing mechanism for the bottom where the connecting block is located;

[0018] The connecting block is connected to the top of the locking head.

[0019] Furthermore, the locking head as a whole presents a rod-shaped structure, and a through-hole structure for the bit rod to pass through is formed in the middle, and at the same time, a second protrusion distributed at equal intervals is arranged at the top where the locking head is located, and the second protrusion is engaged with the first protrusion of the connecting pipe fitting, and is fixedly connected to the upper connecting block in the vertical direction to form a whole.

[0020] Further, the locking head includes a locking head configured as a double-cylinder structure, including an inner locking cylinder and an outer locking cylinder, so that the screwdriver bit rod passes through the middle through hole of the inner locking cylinder and extends downward, and is located at the bottom inner wall of the inner locking cylinder, forming a first sleeve lock;

[0021] The second protrusion is located at the upper end of the inner locking cylinder and extends upward from the upper part of the outer locking cylinder. The outer locking cylinder forms a wrap around the outer periphery of the inner locking cylinder, and a second return spring is arranged in the gap between the inner locking cylinder and the outer locking cylinder. The second return spring is used to realize the locking of the relative positions of the inner locking cylinder and the outer locking cylinder within the travel range.

[0022] When the second return spring is extended, the lower end of the inner locking cylinder extends downward; when the second return spring is compressed, the lower end of the outer locking cylinder extends downward and forms a second sleeve lock with the screwdriver bit rod penetrating the middle.

[0023] Furthermore, a pressure rod assembly is provided on the side where the locking connector is located, so that the extension direction of the pressure rod assembly is aligned with the up-and-down extension direction of the screwdriver bit rod;

[0024] The upper part of the outer locking cylinder is arranged as a boss extending outward, and the boss on the upper part of the outer locking cylinder is pressed down by the pressure rod assembly.

[0025] Furthermore, a covering head is provided at the bottom position where the inner locking cylinder is located, and a blind notch is provided at the upper part where the covering head is located, and is connected with the front end of the screwdriver bit rod through the blind notch, and a secondary screwdriver bit is extended downward from the lower end where the covering head is located, and the size of the screwdriver bit is smaller than the size of the screwdriver bit at the front end of the screwdriver bit rod;

[0026] The auxiliary screwdriver bit and the inner wall where the inner locking cylinder is located form a sleeve lock.

[0027] Beneficial effects of the present invention:

[0028] 1. The connecting pipe and the locking head used in this device cooperate with each other to achieve a good assembly relationship, and no special equipment is required for disassembly and assembly. The locking head is directly lifted so that the whole is implanted into the connecting pipe and fixed with the connecting block, ensuring the accuracy requirements of operation.

[0029] 2. The locking heads used in this device are of various models, which can meet the locking needs of screw parts of different sizes. On the same locking head, an inner locking cylinder and an outer locking cylinder are provided, which are used as a composite sleeve. Through the pressure rod assembly, the relative height adjustment of the outer locking cylinder can be controlled to meet the switching of the inner locking cylinder and the outer locking cylinder at any time. There is no need to disassemble the entire set of locking heads separately, which improves the locking efficiency.

[0030] 3. The bottom of the locking head used in this device is provided with a covering head. When a torque test of a smaller screw is required, since the upper and lower penetrations of the screwdriver bit rod are relatively long, when the bottom size is small, it is easy to break (and affect the torque test). This can further realize the locking operation of smaller screws and measure the various performances of the locking screw.

[0031] 4. The entire device uses the sleeve lock set on the lock head to achieve the coordination and fixation of the positions of lock screws of different models, synchronously feedback the torque changes of the lock screw position and complete the test.

[0032] 5. In the present application, a lifting drive unit is used to adjust the screwdriver bit rod in the vertical direction, thereby avoiding the tediousness of frequent replacement of screw bits. It can adapt to the fastening of screws and nuts of different sizes and models, eliminating the need for frequent replacement of screw bits and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0034] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of the locking connector structure of an embodiment of the present invention;

[0036] Figure 3 is a schematic diagram of the front cross-sectional structure of a locking connector according to an embodiment of the present invention;

[0037] Figure 4 The embodiment of the present invention Figure 3 Schematic diagram of the partial structure at A in the middle;

[0038] Figure 5 is a schematic diagram of the structure of a connecting pipe fitting according to an embodiment of the present invention;

[0039] Figure 6 is a schematic diagram of the connection block structure of an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of the structure of the locking head in the first embodiment of the present invention;

[0041] Figure 8 It is a schematic cross-sectional view of the structure of the outer locking cylinder in a non-pressurized state in the first embodiment of the present invention;

[0042] Fig. 9 It is a schematic cross-sectional view of the structure of the outer locking cylinder under pressure in the first embodiment of the present invention;

[0043] Fig.10 It is a schematic diagram of the lock head structure in the second embodiment of the present invention;

[0044] Fig.11 It is a schematic diagram of the cross-sectional structure of the locking head in the second embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 1 As shown, an embodiment of the present invention provides a screw adjustment test tool, including a base body 1, a connecting pipe 2, a locking connector 3, and a locking head 4.

[0047] like Figure 2 , Figure 3 As shown, a locking connector 3 is provided at the front end portion of the base body 1; at this time, the base body 1 is divided into a multi-section arm shaft connection, and the locking connector 3 located at the front end portion can be rotated at multiple angles, and the overall deflection direction of the locking connector 3 can be controlled, that is, after the entire device is fixed, the direction can be synchronously adjusted through the offset of the base body 1.

[0048] The locking connector 3 includes a main driving member 31, a sleeve member 32, and a screwdriver rod member 33 located at the upper part. At this time, the main driving member 31 is located at the side of the rotating driving part 312 and the lifting driving part 311 is located at the top. The rotating driving part 312 is located above the sleeve member 32 and is fixedly connected to the top of the screwdriver rod member 33 through the rotating driving part 312. In the vertical direction, the screwdriver rod member 33 penetrates the central axis position of the sleeve member 32 (the middle of the sleeve member 32 forms a through hole). Through-hole structure), and a plurality of groups of limiting components 301 are arranged in the middle through-hole where the sleeve member 32 is located, and the limiting components 301 are used to limit the outer diameter of the screwdriver bit rod 33, so that the screwdriver bit rod 33 is located at the central axis position in the middle of the sleeve member 32, so as to ensure that the central axis position of the sleeve member 32 is coincident with the central axis position of the screwdriver bit rod 33, thereby improving the stability of the screwdriver bit rod 33 during rotation, and controlling the screwdriver bit rod 33 to rotate along the center of the axis through the main driving member 31.

[0049] And the lifting drive part 311 is located at the top of the screwdriver rod 33 and fixed. The lifting drive part 311 realizes the upper and lower position adjustment of the screwdriver rod 33 in the direction of the central axis, thereby realizing the adjustment of the screwdriver rod 33 in the vertical direction after the screw is locked. And this adjustment method realizes the adjustment of the height of the screw during the debugging process. According to the adjustment of the height of the screw according to the instruction, the length of the screw in the prior art cannot meet the length requirement of this position, and the screw often needs to be replaced. It is troublesome and laborious to remove the screw and it also affects the locking efficiency. It is also necessary to absorb a long screw of specified specifications after throwing it to the waste point through vacuum adsorption. The present application directly adopts the lifting drive part 311 to meet the adjustment of different specifications in the length direction.

[0050] A sliding block 11 is arranged along the vertical direction on the front end surface of the base body 1, which is connected to the locking connector 3 through the sliding block 11, and the locking connector 3 can slide in the vertical direction synchronously. At this time, an auxiliary driving member 12 is arranged in the base body 1, and the locking connector 3 can slide in the vertical direction along the upper and lower directions of the sliding block 11 as a whole through the auxiliary driving member 12, and the auxiliary driving member 12 is hidden, which improves the aesthetics of the entire device. At the same time, the sliding block 11 is only arranged in the vertical direction, which can limit the movement mode of the locking connector 3 and ensure the accuracy of the vertical movement.

[0051] A connecting pipe fitting 2 is provided at the lower end portion where the sleeve member 32 is located. At this time, the connecting pipe fitting 2 and the sleeve member 32 are concentrically arranged, and are connected to the locking head 4 through the connecting pipe fitting 2. At this time, the locking head 4 is provided with a variety of models, which can facilitate the detachable connection with the connecting pipe fitting 2. During disassembly, the connecting pipe fitting 2 can be directly replaced with a locking head 4 of a different model.

[0052] Specifically: Figure 4 , Figure 5 , Figure 6 In the figure, the connecting pipe fitting 2 is a cylindrical structure, and the inner wall thereof is sleeved with a first return spring member 21, the upper end of the first return spring member 21 is in contact with the bottom of the sleeve member 32, and a connecting block 22 is provided at the lower end of the first return spring member 21 (and forms a downward extrusion force on the connecting block 22), and a first protrusion 201 is provided at the inner central axis position of the lower edge where the connecting pipe fitting 2 is located (at this time, the first protrusion 201 forms a support for the bottom of the connecting block 22), and the gaps between two adjacent groups of first protrusions 201 are equidistant and uniform, and the protruding part of the first protrusion 201 forms a mutual bite fixation with the protruding part of the top of the locking head 4.

[0053] The first return spring member 21 always forms a downward squeezing force on the connecting block 22, thereby synchronously generating a downward squeezing force on the screwdriver bit rod member 33 connected to the connecting block 22. When the bottom of the screwdriver bit rod member 33 is in contact with the force, the force will be released in the vertical direction through the first return spring member 21 connected to the connecting block 22. If the first return spring member 21 is not provided, there will be no buffering, and hard contact is easy to occur. In addition, the first return spring member 21 keeps the connecting pipe member 2 vertical so that its force in the vertical direction is balanced, so as to keep the connecting block 22 from being disengaged.

[0054] When the top of the locking head 4 is engaged with the first protrusion 201 , the locking head 4 is fixed to the connecting pipe 2 as a whole, and then the top of the locking head 4 is locked to the connecting block 22 located in the inner cavity of the connecting pipe 2 by bolts.

[0055] The locking head 4 is a rod-shaped structure as a whole, and a through-hole structure is formed in the middle for the screwdriver bit rod 33 to pass through. At the same time, the top of the locking head 4 is provided with second protrusions 401 distributed at equal intervals. The second protrusions 401 and the first protrusions 201 of the connecting pipe 2 are engaged with each other, thereby forming a whole with the connecting pipe 2 and the locking head 4.

[0056] This installation method is also convenient and can be used for disassembly and assembly without the need for additional proprietary tools (the clearance between the first protrusion 201 and the second protrusion 401 at the top of the locking head 4 is matched to enable the locking head 4 to be detached from or engaged with the connecting pipe 2). Ordinary operators can operate it, which greatly improves the overall adaptability of the equipment and meets the measurement requirements of different types of screw locking.

[0057] Embodiment 1:

[0058] like Figure 7-9 As shown, the locking head 4 is configured as a double-barrel structure (i.e., used as a composite screw), including an inner locking barrel 41 and an outer locking barrel 42, so that the screwdriver bit rod 33 passes through the middle through hole of the inner locking barrel 41 and extends downward, and is located on the bottom inner wall of the inner locking barrel 41 (at this time, the inner locking barrel 41 is a cylindrical structure passing through from top to bottom), forming a first sleeve lock; at this time, the center position of the first sleeve lock is fixed by the position generated by the front end of the screwdriver bit rod 33, and the outer end is locked by the bottom inner wall of the inner locking barrel 41.

[0059] The second protrusion 401 is located at the upper end of the inner locking cylinder 41 and extends upward from the upper part of the outer locking cylinder 42. The outer locking cylinder 42 wraps the outer periphery of the inner locking cylinder 41, and a second return spring 402 is provided in the gap between the inner locking cylinder 41 and the outer locking cylinder 42. The second return spring 402 realizes the locking of the relative position of the inner locking cylinder 41 and the outer locking cylinder 42 within the travel range.

[0060] When the second return spring 402 is extended (at this time, the second return spring 402 is located in the gap between the inner locking cylinder 41 and the outer locking cylinder 42, forming a relative position connection between the two locking cylinders), the lower end of the inner locking cylinder 41 extends downward, that is, the bottom height of the inner locking cylinder 41 is lower than the bottom height of the outer locking cylinder 42. When the second return spring 402 is compressed, the lower end of the outer locking cylinder 42 extends downward (that is, after the outer locking cylinder 42 is pressed down, the bottom height is lower than the bottom height of the inner locking cylinder 41), and forms a second sleeve lock with the screwdriver bit rod 33 passing through the middle.

[0061] In order to achieve rapid downward pressing of the external locking cylinder 42, a pressure rod assembly 34 is provided on the side where the locking connector 3 is located, so that the extension direction of the pressure rod assembly 34 is aligned with the upper and lower extension directions of the screwdriver bit rod 33 to ensure accuracy during downward pressing.

[0062] The upper portion of the outer locking tube 42 is provided with a boss 421 extending outward, and the boss 421 on the upper portion of the outer locking tube 42 is pressed downward by the pressure rod assembly 34 .

[0063] When a larger outer locking cylinder 42 is required for positioning, the connecting pipe 2 located above the outer locking cylinder 42 is squeezed downward, and the outer locking cylinder 42 is pressed downward simultaneously, so that the inner locking cylinder 41 located at the bottom of the outer locking cylinder 42 extends downward. At the same time, the screwdriver bit rod 33 is synchronously lowered under the action of the lifting drive part 311, forming a second sleeve lock, and completing the locking and tightening of the locking screw.

[0064] When the pressure rod assembly 34 is lifted, the outer locking tube 42 is reset under the action of the second reset spring 402 , thereby achieving the lifting and reset of the outer locking tube 42 .

[0065] Embodiment 2:

[0066] like Figure 10-11 As shown, according to needs, the locking head 4 is set to an independent sleeve structure (that is, there is only one sleeve structure, and there is no external locking tube structure), which is an inner locking tube 41, and a covering head 411 is provided at the bottom position of the inner locking tube 41 (the covering head 411 forms a blockage for the bottom of the inner locking tube 41), and a blind notch 412 is provided at the upper part where the covering head 411 is located, and is connected with the front end (lower end) of the bit rod 33 through the blind notch 412, and at the same time, a sub-bite bit 413 is extended downward from the lower end where the covering head 411 is located (the sub-bite bit 413 and the blind notch 412 are coaxially arranged), and the size of the bit 413 is smaller than the bit size at the front end of the bit rod 33, so that the sub-bite bit 413 and the inner wall where the inner locking tube 41 is located form a sleeve lock. That is, when a torque test of a smaller screw is required, since the screwdriver bit rod 33 is longer in length, when the bottom size is small, it is easy to break (and affect the torque test). The unique setting method of the present application can further realize the locking operation of smaller screws and perform various performance tests of the locking screw.

[0067] The entire device, through the sleeve lock provided on the locking head 4, realizes the matching and fixing of the positions of the lock screws of different models, synchronously feeds back the torque change of the lock screw position and completes the test.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A screw adjustment test tool, comprising a base body (1), a locking connector (3), and a locking head (4), characterized in that ； A locking connector (3) is provided at the front end portion of the seat body (1); The locking connection body (3) comprises a main driving member (31) located at the upper part, a sleeve member (32), and a screwdriver bit rod member (33); the main driving member (31) is located above the sleeve member (32) and is connected to the top of the screwdriver bit rod member (33); the screwdriver bit rod member (33) penetrates the central axis position of the sleeve member (32); the main driving member (31) controls the screwdriver bit rod member (33) to perform rotational movement along the center of the axis; The lower end of the sleeve member (32) is provided with a connecting pipe member (2), and is connected to the locking head (4) through the connecting pipe member (2); By means of the sleeve lock arranged on the locking head (4), the positions of locking screws of different models can be fixed in coordination, and the torque change of the locking screw position can be synchronously fed back to complete the test.

2. The screw adjustment test tool according to claim 1, characterized in that: A sliding block (11) is provided along the vertical direction on the front end surface of the seat body (1), which is connected to the locking connection body (3) through the sliding block (11) and synchronously realizes the sliding of the locking connection body (3) in the vertical direction.

3. The screw adjustment test tool according to claim 2, characterized in that: An auxiliary driving component (12) is arranged inside the seat body (1), and the auxiliary driving component (12) enables the locking connecting body (3) to slide vertically along the up-and-down direction of the sliding block (11) as a whole.

4. The screw adjustment test tool according to claim 1, characterized in that: A plurality of groups of limiting components (301) are arranged in the middle through hole where the sleeve member (32) is located, and the limiting components (301) are used to limit the outer diameter of the screwdriver bit rod member (33), so that the screwdriver bit rod member (33) is located at the central axis position in the middle of the sleeve member (32) and realizes self-rotation synchronously.

5. The screw adjustment test tool according to claim 1, characterized in that: The main driving member (31) comprises a rotation driving part (312) and a lifting driving part (311), and the rotation driving part (312) enables the screwdriver bit rod (33) to perform self-rotational motion in the direction of the central axis in the sleeve member (32); The lifting drive unit (311) realizes the up and down position adjustment of the screwdriver bit rod (33) in the direction of the central axis.

6. The screw adjustment test tool according to claim 1, characterized in that: The inner wall of the connecting pipe (2) is sleeved with a first return spring (21), the upper end of the first return spring (21) contacts the bottom of the sleeve (32), and a connecting block (22) is arranged at the lower end of the first return spring (21). A first protrusion (201) is arranged at the inner central axis position of the lower edge of the connecting pipe (2), and two adjacent groups of the first protrusions (201) are evenly spaced to form a bearing for the bottom of the connecting block (22); The connecting block (22) is connected to the top of the locking head (4).

7. The screw adjustment test tool according to claim 6, characterized in that: The locking head (4) is a rod-shaped structure as a whole, and a through-hole structure is formed in the middle for the screwdriver bit rod (33) to pass through. At the same time, second protrusions (401) are arranged at equal intervals on the top where the locking head (4) is located. The second protrusions (401) are mutually engaged with the first protrusions (201) of the connecting pipe (2), and are fixedly connected to the upper connecting block (22) in the vertical direction to form a whole.

8. The screw adjustment test tool according to claim 7, characterized in that: The locking head (4) includes a locking head (4) configured as a double-tube structure, including an inner locking tube (41) and an outer locking tube (42), so that the screwdriver bit rod (33) passes through the middle through hole of the inner locking tube (41) and extends downward, and is located at the bottom inner wall of the inner locking tube (41), forming a first sleeve lock; The second protrusion (401) is located at the upper end of the inner locking cylinder (41) and extends upward from the upper part where the outer locking cylinder (42) is located. The outer locking cylinder (42) wraps around the outer periphery of the inner locking cylinder (41), and a second return spring (402) is provided in the gap between the inner locking cylinder (41) and the outer locking cylinder (42). The second return spring (402) is used to realize the locking of the relative positions of the inner locking cylinder (41) and the outer locking cylinder (42) within the travel range; When the second return spring (402) is extended, the lower end of the inner locking cylinder (41) extends downward; when the second return spring (402) is compressed, the lower end of the outer locking cylinder (42) extends downward and forms a second sleeve lock with the screwdriver bit rod (33) passing through the middle.

9. The screw adjustment test tool according to claim 8, characterized in that: A pressure rod assembly (34) is arranged on the side where the locking connector (3) is located, so that the extension direction of the pressure rod assembly (34) is aligned with the up-and-down extension direction of the screwdriver bit rod (33); The upper part of the outer locking cylinder (42) is provided with a boss (421) extending outward, and the boss (421) on the upper part of the outer locking cylinder (42) is pressed down by the pressure rod assembly (34).

10. The screw adjustment test tool according to claim 8, characterized in that: A covering head (411) is arranged at the bottom of the inner locking cylinder (41), a blind notch (412) is arranged at the upper part of the covering head (411), and the blind notch (412) is connected with the front end of the screwdriver bit rod (33), and a sub-screw bit (413) extends downward from the lower end of the covering head (411), and the size of the screwdriver bit (413) is smaller than the size of the screwdriver bit at the front end of the screwdriver bit rod (33); The auxiliary screwdriver bit (413) and the inner wall of the inner locking cylinder (41) form a sleeve lock.

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