Dismounting tool
By designing a disassembly tool that includes a housing, a drive shaft, and a screw, the problems of time-consuming, labor-intensive, and safety hazards in disassembling hydraulic end caps in existing technologies have been solved. This tool enables fast and safe cap disassembly, reduces labor intensity, and improves work efficiency.
Patent Information
- Application Number
- CN202423228215.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In the existing technology, disassembling the hydraulic end cap is labor-intensive and poses safety hazards. Using a cap puller is time-consuming and laborious, and can easily lead to accidents where fingers are pinched by a hammer.
A disassembly tool comprising a housing, a drive shaft, and a screw was designed. The drive shaft is connected to a torque wrench, and the screw threaded connection is used to remove the gland from the valve box, achieving quick disassembly.
It reduces the labor intensity of operators, improves work efficiency, reduces safety hazards, and enables quick disassembly of the pressure cap.
Smart Images
Figure CN223876922U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of oil and gas production equipment, in particular to a dismounting tool. BACKGROUND
[0002] The plunger pump is a core component of oil field operation, and is often used in cementing, acidizing and fracturing operations. The plunger pump reciprocates under the drive of an external diesel engine or motor to realize the pumping of high-pressure liquid. The fluid end assembly system, as a core component of the plunger pump, plays a crucial role in the pumping of medium in cementing, acidizing and fracturing operations. Through the reciprocating movement of the plunger of the fluid end, the volume of the sealing cavity changes periodically, thereby realizing the suction and discharge of medium in a high-pressure environment. However, each suction and discharge of medium causes wear to the internal fittings (such as plunger packing, valve body, valve seat, valve spring, etc.) of the fluid end, so the internal fittings need to be frequently replaced. Each time the above-mentioned internal fittings are replaced, the gland needs to be first dismounted from the valve box.
[0003] In the process of dismounting the fluid end gland, the tool of the existing technology usually uses a gland puller (commonly known as a "slide hammer") to dismount the gland. In dismounting, the gland puller is first connected with the gland, and then the inertia of the hammer on the gland puller is used to dismount the gland. Since the fit between the gland and the valve box is tight, the hammer is usually used to pull back and forth several times to dismount the gland, which is time-consuming and laborious. Moreover, due to the structure of the gland puller, the hammer may even squeeze the fingers sometimes, resulting in frequent safety accidents. Therefore, a quick, convenient and safe tool is needed to dismount the fluid end gland, so as to reduce the labor intensity of the operator, improve the operation efficiency and reduce the safety hazards. CONTENT OF THE UTILITY MODEL
[0004] Based on this, the purpose of the present application is to provide a dismounting tool to solve the problem of high labor intensity and frequent safety accidents caused by dismounting the gland by using the gland puller of the prior art.
[0005] According to one aspect of the present application, a dismounting tool is provided, which comprises:
[0006] a housing having a receiving cavity therein, and the housing being provided with a first through hole and a second through hole communicating with the receiving cavity;
[0007] a transmission shaft penetrating the first through hole and being rotatably connected to the housing about a central axis of the transmission shaft, the transmission shaft having a first end for connecting a torque wrench and a second end provided with a threaded hole communicating with the inside of the transmission shaft;
[0008] A screw rod is movably arranged in the threaded hole and the second through hole along the axial direction of the screw rod, and is threadedly connected to the transmission shaft through the threaded hole, one end of the screw rod being located in the transmission shaft and the other end being exposed outside the shell.
[0009] In one of the embodiments, the dismounting tool is used to dismount the first workpiece from the second workpiece, and the end of the screw rod exposed outside the shell is used to connect the first workpiece; the outer circumferential surface of the shell is provided with support seats, which are used to be supported by the second workpiece when the screw rod moves relative to the shell to dismount the first workpiece.
[0010] In one of the embodiments, the support seats are at least two, and all the support seats are arranged in pairs, and the two support seats arranged in pairs are symmetrically connected to the shell along the radial direction of the shell.
[0011] In one of the embodiments, the hole wall of the second through hole is provided with a protrusion, and the outer circumferential surface of the screw rod is provided with a groove extending along the axial direction of the screw rod, and the protrusion is clamped in the groove.
[0012] In one of the embodiments, the groove extends along the axial direction of the screw rod from the end of the screw rod located in the transmission shaft, and the length of the groove extending along the axial direction of the screw rod is less than the length of the screw rod along the axial direction of itself.
[0013] In one of the embodiments, the outer circumferential surface of the transmission shaft is provided with a bearing, and the bearing is connected to the shell, so that the transmission shaft is rotatably connected to the shell through the bearing.
[0014] In one of the embodiments, the shell comprises a shell body and a plug cover, one end of the shell body is provided with an opening, the plug cover closes the opening, the first through hole penetrates through the plug cover, and the second through hole is arranged at the end of the shell body away from the plug cover.
[0015] In one of the embodiments, the transmission shaft is provided with a first shaft shoulder facing the first through hole and a second shaft shoulder facing the second through hole, and the bearing is provided with two, one side of one of the bearings abutting against the first shaft shoulder and the plug cover, and one side of the other bearing abutting against the second shaft shoulder and the bottom wall of the accommodating cavity.
[0016] In one of the embodiments, the screw rod is provided with a limiting piece at the end located in the transmission shaft, and the limiting piece is arranged along the radial direction of the screw rod and protrudes from the outer circumferential surface of the screw rod.
[0017] In one embodiment, the limiting member is detachably connected to the screw, the outer peripheral surface of the drive shaft has a first mounting hole communicating with the interior of the drive shaft, and the outer peripheral surface of the housing has a second mounting hole communicating with the receiving cavity; when the screw moves relative to the drive shaft and the housing along its own axial direction, the limiting member can be coaxially aligned with the first mounting hole and the second mounting hole.
[0018] The aforementioned disassembly tool, by comprising a housing, a drive shaft, and a screw, allows the drive shaft to pass through the first through hole of the housing and be rotatably connected to the housing around its central axis. When a torque wrench is connected to the first end of the drive shaft, the torque wrench can drive the drive shaft to rotate around its central axis. Simultaneously, by movably passing the screw through a threaded hole in the drive shaft and a second through hole in the housing, and threadedly connected to the drive shaft, the rotation of the drive shaft converts the screw's motion into reciprocating linear motion along its axial direction. Therefore, it allows for quick and convenient disassembly of the first workpiece (e.g., a pressure cap) mounted on a second workpiece (e.g., a valve box), eliminating the need for manual pulling with a sliding hammer, thus reducing labor intensity, improving work efficiency, and minimizing safety hazards. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of a cap puller for removing the cap according to a prior art embodiment.
[0020] Figure 2 This is a schematic diagram illustrating an application scenario of the disassembly tool provided in one embodiment of this application.
[0021] Figure 3 This is a schematic diagram of the appearance of a disassembly tool provided in one embodiment of this application.
[0022] Figure 4 This is a cross-sectional view of the internal structure of a disassembly tool provided in an embodiment of this application.
[0023] Figure 5 This is a cross-sectional view of the drive shaft in a disassembly tool provided in an embodiment of this application.
[0024] Figure 6 for Figure 4 An enlarged schematic diagram of region A in the middle.
[0025] Figure 7 This is an axonometric view of the housing in a disassembly tool provided in an embodiment of this application.
[0026] Figure 8 for Figure 4 Enlarged schematic diagram of region B in the middle.
[0027] Explanation of reference numerals in the attached figures:
[0028] 10, hydraulic end assembly; 11, valve box; 12, gland; 20, gland puller; 21, long rod; 22, hand hammer; 23, baffle; 30, torque wrench; 40, dismounting tool; 41, housing; 411, accommodating cavity; 412, first through hole; 413, second through hole; 414, protrusion; 415, second mounting hole; 41a, housing body; 41b, plug cover; 41c, fastener; 42, transmission shaft; 42a, first end; 42b, second end; 421, threaded hole; 422, inner square hole; 423, first shaft shoulder; 424, second shaft shoulder; 425, first mounting hole; 43, screw rod; 431, groove; 44, support seat; 45, bearing; 46, limiting piece; 47, plug. DETAILED DESCRIPTION
[0029] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and claimed in this disclosure and it is understood that it is in no way limited to the specific embodiments described in this disclosure.
[0030] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or piece referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0031] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.
[0032] In the present application, unless specifically defined otherwise, if there is any appearance of the terms "mount", "connect", "connection", "fixed", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two parts or the interaction relationship between two parts, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0033] In the present application, unless specifically defined otherwise, if there is any appearance of the terms "mount", "connect", "connection", "fixed", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two parts or the interaction relationship between two parts, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0034] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.
[0035] As described in the background, the hydraulic end assembly system as the core component of the plunger pump plays a crucial role in the pumping of medium in cementing, acidizing, and fracturing operations. Through the reciprocating motion of the plunger of the hydraulic end, the volume of the sealing cavity changes periodically, thereby achieving the suction and discharge of the medium in a high-pressure environment. However, during each medium suction and discharge process, the internal fittings of the hydraulic end are subject to wear and tear, and therefore the internal fittings need to be frequently replaced. The frequency of replacement varies from several dozen to several hundred hours depending on the operating pressure and operating displacement. Figure 1 As shown in FIG. 1, Figure 1 A schematic diagram of the hydraulic end assembly 10 is shown, which includes a valve box 11, a gland 12, and various fittings (such as a plunger packing, a valve body, a valve seat, a valve spring, etc.), which are sealed in the valve box 11 by the gland 12. Each time the internal fittings are replaced, the gland 12 needs to be first disassembled.
[0036] The existing technology usually uses a tool of a gland puller (commonly known as "slip hammer") to disassemble the gland 12. Figure 1 A schematic diagram of the gland puller 20 is shown in the middle. When disassembling, the gland puller 20 is first connected with the gland 12. Specifically, the long rod 21 of the gland puller 20 is screwed into the thread of the gland 12. The operator moves the hand hammer 22 by hand. The inertial force of the hand hammer 22 acts on the baffle 23. The inertial force is transmitted to the long rod 21 by the baffle 23, so as to disassemble the gland 12 from the valve box 11. In use, sometimes the cooperation between the gland 12 and the valve box 11 is tight, and the hand hammer 22 needs to be moved back and forth to strike the baffle 23 for several times. Not only is it time-consuming and laborious, but even the hand hammer 22 may squeeze the fingers, resulting in frequent safety accidents.
[0037] In order to solve the above problems, the application provides a disassembly tool for replacing the existing gland puller to disassemble the gland from the valve box, so as to reduce the labor intensity of the operator, improve the work efficiency, and reduce the safety hazard.
[0038] The structure of the disassembly tool provided by the application will be described below with the disassembly tool used for disassembling the gland from the valve box as an example. The embodiment is only used as an example for illustration and will not limit the technical scope of the application. It can be understood that in other embodiments, the disassembly tool of the application is not limited to only being used for disassembling the gland from the valve box, but can also be used for disassembling any first workpiece which is not limited to the gland from any second workpiece which is not limited to the valve box, which is not limited here.
[0039] Referring to Figure 2 , Figure 2 A schematic diagram of the application scene of the disassembly tool 40 in an embodiment of the application is shown. The disassembly tool 40 provided by an embodiment of the application has one end for connecting the gland 12 on the valve box 11 and the other end for connecting the torque wrench 30 (such as an electric torque wrench). The torque wrench 30 cooperates with the disassembly tool 40 to provide power to disassemble the gland 12 from the valve box 11 by the torque wrench 30, so as to facilitate the replacement of various parts in the valve box 11.
[0040] Specifically, referring to Figure 3 and Figure 4 , Figure 3 A schematic diagram of the appearance of the disassembly tool 40 in an embodiment of the application is shown, Figure 4 A schematic diagram of the internal structure of the disassembly tool 40 is shown. The disassembly tool 40 provided by the embodiment of the application includes a housing 41, a transmission shaft 42, and a screw rod 43. The transmission shaft 42 is coaxially arranged in the housing 41 and connected to the housing 41. The screw rod 43 is coaxially and threadedly connected to the transmission shaft 42.
[0041] Specifically, in combination withFigure 4 and Figure 5 As shown in
[0042] Exemplarily, the first end 42a of the transmission shaft 42 is provided with an inner square hole 422, and the torque wrench 30 is an electric torque wrench which has an outer square shaft matched with the inner square hole 422. The outer square shaft can be inserted into the inner square hole 422, so that the torque wrench 30 is connected with the transmission shaft 42. At this time, the housing 41 is fixed, the electric torque wrench 30 is powered on, and the outer square shaft can rotate around the central axis thereof. With the rotation of the outer square shaft, the transmission shaft 42 can also be controlled to rotate around the central axis thereof relative to the housing 41 and drive the screw rod 43 to move. Since the screw rod 43 is threadedly connected with the transmission shaft 42, the rotational movement of the transmission shaft 42 can convert the movement of the screw rod 43 into linear reciprocating movement along the axial direction of the screw rod 43, so as to realize the pulling of the gland 12 from the valve box 11.
[0043] It can be understood that the connection structure of the transmission shaft 42 and the torque wrench 30 is not limited to the structure of the inner square hole 422 and the torque wrench 30, but can also be any other connection structure, as long as it can be connected with the torque wrench 30 and the torque wrench 30 can apply torque to make the transmission shaft 42 rotate, which is not limited herein.
[0044] Preferably, as shown in Figure 2 , Figure 3 and Figure 4 The outer circumferential surface of the housing 41 is provided with a support seat 44, Figure 2 In the embodiment shown in Figure 4 When the screw rod 43 moves upward relative to the housing 41 along the vertical direction, the support seat 44 can be supported by the valve box 11, so that the housing 41 can be prevented from moving downward by itself without being manually held, thereby freeing the hands of the operator and saving the labor of the operator.
[0045] It can be understood that the number of support seats 44 is not limited, but preferably, the number of support seats 44 is at least two, all support seats 44 are arranged in pairs, and the two support seats arranged in pairs are connected to the shell 41 radially symmetrically, so that the support seats 44 can be balanced and will not be tilted when supported by the valve box 11.
[0046] More preferably, please continue to refer to Figure 4 The outer circumferential surface of the transmission shaft 42 is sleeved with a bearing 45, the bearing 45 is connected to the shell 41, and the transmission shaft 42 is rotatably connected to the shell 41 through the bearing 45. The role of the bearing 45 is to reduce the friction between the transmission shaft 42 and the shell 41, so that when the transmission shaft 42 rotates, the torque provided by the torque wrench 30 will be substantially all transmitted to the transmission shaft 42, and will not be mostly consumed in overcoming the friction, thereby avoiding the shell 41 from rotating with the transmission shaft 42.
[0047] In a specific embodiment, the shell 41 is a cylindrical hollow tubular structure, which includes a shell body 41a and a plug 41b, wherein the shell body 41a has an opening at one end along its own axial direction, the plug 41b detachably closes the opening, the inner wall of the shell body 41a and one side surface of the plug 41b jointly form a containing cavity 411, a first through hole 412 penetrates the plug 41b, a second through hole 413 is arranged at one end of the shell body 41a away from the plug 41b, and the support seat 44 is connected to the shell body 41a.
[0048] Optionally, the support seat 44 and the shell 41 can be an integrally cast, forged processing structure, or a mutually welded or mutually assembled structure; and in order to prevent the plug 41b from loosening, the plug 41b can be detachably connected to the shell body 41a by a fastener 41c (for example, an inner hexagonal flat end set screw) as shown in Figure 4 , or can be detachably connected to the shell body 41a by clamping or the like, which are not limited.
[0049] As shown in Figure 4 and Figure 5 , the transmission shaft 42 is also a cylindrical hollow tubular structure, which has a first shaft shoulder 423 arranged towards the first through hole 412 and a second shaft shoulder 424 arranged towards the second through hole 413 at opposite ends along its own axial direction, and the bearing 45 correspondingly has two, one of which abuts against the first shaft shoulder 423 and the plug 41b at two sides along its own axial direction, and the other abuts against the second shaft shoulder 424 and the bottom wall of the containing cavity 411 at two sides along its own axial direction. In this way, both bearings 45 can be fixed in the shell 41, and balanced and stable rotation can be achieved when the transmission shaft 42 rotates relative to its central axis.
[0050] Optionally, the transmission shaft 42 can be a structure welded by two parts, the first end 42a is located in one part, the second end 42b is located in the other part, or can be a structure integrally machined, forged or cast, and the present application is not limited thereto.
[0051] Further, in order to completely prevent the screw rod 43 from rotating with the transmission shaft 42, the screw rod 43 can only move linearly along the axial direction of itself. In an embodiment, as shown in Figure 4 、 Figure 6 and Figure 7 , the second through hole 413 of the housing 41 is provided with a protrusion 414 on the hole wall, and the outer circumferential surface of the screw rod 43 is provided with a groove 431 extending along the axial direction of the screw rod 43, and the protrusion 414 is clamped in the groove 431. In this way, when the transmission shaft 42 rotates around its central axis, the protrusion 414 abuts against the groove wall of the groove 431, so that the screw rod 43 can only move linearly along the axial direction of itself and cannot rotate with the transmission shaft 42, thereby more smoothly converting the rotation of the transmission shaft 42 into the linear motion of the screw rod 43.
[0052] Preferably, the groove 431 extends along the axial direction of the screw rod 43 from one end of the screw rod 43 located in the transmission shaft 42, and the length of the groove 431 extending along the axial direction of the screw rod 43 is less than the length of the screw rod 43 along the axial direction of itself, so that after the screw rod 43 moves upward along the axial direction of itself by a certain distance, the protrusion 414 can abut against the groove wall of the groove 431 along the axial direction of the screw rod 43, thereby limiting the screw rod 43 from continuing to move upward and positioning the screw rod 43.
[0053] Further, in order to also position the screw rod 43 when it moves downward along the axial direction of itself and prevent the screw rod 43 from sliding out of the transmission shaft 42, the screw rod 43 is provided with a limiting piece 46 at one end located in the transmission shaft 42, and the limiting piece 46 is arranged along the radial direction of the screw rod 43 and protrudes from the outer circumferential surface of the screw rod 43.
[0054] In some embodiments, the limiting piece 46 can be a protrusion protruding from the outer circumferential surface of the screw rod 43, or can be a screw or cylindrical pin detachably connected with the screw rod 43, and the present application is not limited thereto. When the limiting piece 46 is detachable from the screw rod 43, in order to facilitate the installation or removal of the limiting piece 46, as Figure 8As shown, the outer circumferential surface of the transmission shaft 42 is provided with a first mounting hole 425 communicating with the inside of the transmission shaft 42, and the outer circumferential surface of the shell 41 is provided with a second mounting hole 415 communicating with the accommodating cavity 411; when the screw rod 43 moves along the axial direction of the screw rod 43 relative to the transmission shaft 42 and the shell 41, the limiting piece 46 can be coaxially located in the first mounting hole 425 and the second mounting hole 415. In this way, when the limiting piece 46 is coaxially located in the first mounting hole 425 and the second mounting hole 415, the limiting piece 46 can be conveniently mounted on the screw rod 43 through the first mounting hole 425 and the second mounting hole 415, or the limiting piece 46 can be taken out from the first mounting hole 425 and the second mounting hole 415 after being disassembled from the screw rod 43.
[0055] On this basis, please continue to refer to Figure 8 The second mounting hole 415 is also provided with a plug 47, the plug 47 is inserted into the second mounting hole 415 and closes the second mounting hole 415, so that dust or foreign matter can be prevented from entering the shell 41 or entering the transmission shaft 42 from the second mounting hole 415.
[0056] As can be seen, the dismounting tool 40 provided by the present application, when in use, only needs to be lapped on the valve box 11 by the support seat 44, and after one end of the threaded rod is screwed with the threaded hole 421 of the gland 12, the transmission shaft 42 is driven by the torque wrench 30 to rotate around the central axis of the transmission shaft 42, so that the screw rod 43 can reciprocatingly and linearly move along the axial direction of the screw rod 43, thus the gland 12 installed on the valve box 11 can be quickly and conveniently disassembled, without the need for manual use of a slide hammer to pull back and forth multiple times, so as to reduce the labor intensity of the laborers, improve the work efficiency, and reduce the occurrence of safety hazards.
[0057] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.
[0058] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A dismounting tool, characterized in that The dismounting tool comprises: a housing having a receiving cavity therein, and first and second through holes communicating with the receiving cavity; a transmission shaft passing through the first through hole and rotatably connected to the housing about a central axis of the transmission shaft, the transmission shaft having a first end for connecting a torque wrench and a second end having a threaded hole communicating with the interior of the transmission shaft; a screw rod movably passing through the threaded hole and the second through hole along the axial direction of the screw rod and threadedly connected to the transmission shaft, one end of the screw rod being located in the transmission shaft and the other end being exposed to the housing.
2. The disassembly tool according to claim 1, characterized in that The dismounting tool is used for dismounting a first workpiece from a second workpiece, and the end of the screw rod exposed to the housing is used for connecting the first workpiece; the outer peripheral surface of the housing is provided with support seats for being supported by the second workpiece when the screw rod moves relative to the housing to dismount the first workpiece.
3. The tool of claim 2, wherein The support seats are at least two, and all the support seats are arranged in pairs and symmetrically connected to the housing along the radial direction of the housing.
4. The tool of claim 1, wherein The hole wall of the second through hole is provided with a protrusion, and the outer peripheral surface of the screw rod is provided with a groove extending along the axial direction of the screw rod, and the protrusion is clamped in the groove.
5. The tool of claim 4, wherein The groove extends along the axial direction of the screw rod from the end of the screw rod located in the transmission shaft, and the length of the groove extending along the axial direction of the screw rod is less than the length of the screw rod along the axial direction of itself.
6. The tool of claim 1, wherein The outer peripheral surface of the transmission shaft is provided with a bearing connected to the housing, so that the transmission shaft is rotatably connected to the housing through the bearing.
7. The disassembly tool according to claim 6, characterized in that The housing comprises a housing body and a plug, one end of the housing body has an opening, the plug closes the opening, the first through hole penetrates the plug, and the second through hole is formed in the end of the housing body away from the plug.
8. The disassembly tool according to claim 7, characterized in that The transmission shaft has a first shaft shoulder facing the first through hole and a second shaft shoulder facing the second through hole, the bearing has two, and the two sides of one of the bearings abut against the first shaft shoulder and the plug, respectively, and the two sides of the other bearing abut against the second shaft shoulder and the bottom wall of the receiving cavity, respectively.
9. The tool of claim 1, wherein The screw rod is provided with a limiting piece at the end located in the transmission shaft, the limiting piece is arranged along the radial direction of the screw rod and protrudes from the outer peripheral surface of the screw rod.
10. The disassembly tool according to claim 9, characterized in that The limiting piece is detachably connected to the screw rod, the outer peripheral surface of the transmission shaft is provided with a first mounting hole communicating with the interior of the transmission shaft, and the outer peripheral surface of the housing is provided with a second mounting hole communicating with the receiving cavity; when the screw rod moves relative to the transmission shaft and the housing, the limiting piece can be coaxially located in the first mounting hole and the second mounting hole.